Page 2 Safety Precautions Please read the following safety precautions carefully before installing the unit to ensure safety. Indicates a risk of death or serious injury. Indicates a risk of serious injury or structural damage. Make sure that this manual is passed on to the end user to retain for future reference. Retain this manual for future reference.
Page 3 To reduce the risk of burns or frost bites, do To reduce the risk of electric shock, smoke, not touch the refrigerant pipes or refrigerant and fire due to infiltration of dust and water, circuit components with bare hands during properly install all required covers and pan- and immediately after operation.
Page 4 Any additional parts must be installed by water leaking, injury, electric shock, and the dealer or qualified personnel. Only use fire. the parts specified by Mitsubishi Electric. Dispose of the packing material. There is a Installation by unauthorized personnel or risk of an injury.
Page 5 To keep the ceiling and floor from getting plosion due to abnormal pressure rise, do wet due to condensation, properly insulate not allow any substances other than R410A the pipes. (such as air) to enter the refrigerant circuit. [5] Wiring Work...
Page 6 To reduce the risk of current leakage, over- Grounding (earth) work must be performed heating, smoke, or fire, use properly rated by a qualified electrician. Do not connect cables with adequate current carrying ca- the ground wire to a gas pipe, water pipe, pacity.
Page 7 R410A leak. Infiltration of the age the compressor. residual refrigerant, refrigerant oil, or water Charge refrigerant in the liquid state.
Page 8: Table Of Contents
CONTENTS Chapter 1 Check Before Servicing Preparation for Piping Work........................3 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ....... 5 Working with Refrigerant Piping......................9 Precautions for Wiring ......................... 13 Chapter 2 Restrictions System Configurations ........................17 Types and Maximum Allowable Length of Cables ................
Page 9 CONTENTS Chapter 8 Troubleshooting Based on Observed Symptoms MA Remote Controller Problems ...................... 237 ME remote Controller Problems ....................... 241 Refrigerant Control Problems ......................245 Checking Transmission Waveform and for Electrical Noise Interference ........250 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ..253 Troubleshooting Solenoid Valve Problems ..................255 Troubleshooting Outdoor Unit Fan Problems .................
Page 10 Chapter 1 Check Before Servicing Preparation for Piping Work ........................ 3 1-1-1 Read before Servicing ..........................3 1-1-2 Tool Preparation ............................. 4 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil...... 5 1-2-1 Piping Materials ............................5 1-2-2 Storage of Piping Materials........................6 1-2-3 Pipe Processing ............................
Page 11 HWE14080 - 2 -...
Page 12: Preparation For Piping Work
1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type Multi air conditioner for building application CITY MULTI TLMU, YLMU series:R410A 2. Check the symptoms exhibited by the unit to be serviced. Refer to this service handbook for symptoms relating to the refrigerant cycle.
Page 13: Tool Preparation
Refrigerant Recovery Equipment Refrigerant recovery May be used if compatible with R410A. 3. Tools and materials that are used with R22 or R407C that may also be used with R410A Tools/Materials Notes Vacuum Pump with a Check Valve Vacuum drying...
Page 14: Handling And Characteristics Of Piping Materials, Refrigerant, And Refrigerant Oil
Select piping materials that meet the requirements set forth in ASTM B280. 4. Thickness and refrigerant type indicated on the piping materials Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant (R410A). 5. Flare processing Select piping materials that meet the requirements set forth in ASTM.
Page 15: Storage Of Piping Materials
[1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 1-2-2 Storage of Piping Materials 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner's warehouse) If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe. 2.
Page 16: Characteristics Of The New And Conventional Refrigerants
2. Refrigerant composition R410A is a pseudo-azeotropic HFC blend and can almost be handled the same way as a single refrigerant, such as R22. To be safe, however, draw out the refrigerant from the cylinder in the liquid phase. If the refrigerant in the gaseous phase is drawn out, the composition of the remaining refrigerant will change and become unsuitable for use.
Page 17: Refrigerant Oil
Refrigerating machine oil Mineral oil R407C Ester oil R410A Ester oil 2. Effects of contaminants Refrigerating machine oil used in the HFC system must be handled with special care to keep contaminants out. The table below shows the effect of contaminants in the refrigerating machine oil on the refrigeration cycle.
Page 18: Working With Refrigerant Piping
[1-3 Working with Refrigerant Piping ] Working with Refrigerant Piping 1-3-1 Pipe Brazing No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system. Example: Inside the brazed connection Use of no inert gas during brazing Use of inert gas during brazing...
Page 19: Air Tightness Test
[1-3 Working with Refrigerant Piping ] 1-3-2 Air Tightness Test No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak. Halide torch R22 leakage detector 1. Items to be strictly observed Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight-...
Page 20: Vacuum Drying
[1-3 Working with Refrigerant Piping ] 1-3-3 Vacuum Drying (Photo1) 15010H (Photo2) 14010 Recommended vacuum gauge: ROBINAIR 14010 Thermistor Vacuum Gauge 1. Vacuum pump with a reverse-flow check valve (Photo1) To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.
Page 21: Refrigerant Charging
1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled the same way as a single refrigerant, such as R22. To be safe, however, draw out the refrigerant from the cylinder in the liquid phase.
Page 22: Precautions For Wiring
[1-4 Precautions for Wiring ] Precautions for Wiring Control boxes house high-voltage and high-temperature electrical parts. They may still remain energized or hot after the power is turned off. When opening or closing the front cover of the control box, keep out of contact with the internal parts. Before inspecting the inside of the control box, turn off the power, leave the unit turned off for at least 10 minutes, and check that the voltage of the electrolytic capacitor (inverter main circuit) has dropped to 20 VDC or less.
Page 23 [1-4 Precautions for Wiring ] 2) Check the wires are securely fastened to the screw terminals. Screw the screws straight down so as not to damage the screw threads. Hold the two round terminals back to back to ensure that the screw will screw down straight. After tightening the screw, mark a line through the screw head, washer, and terminals with a permanent marker.
Page 24: Chapter 2 Restrictions
Chapter 2 Restrictions System Configurations........................17 Types and Maximum Allowable Length of Cables................18 Switch Settings ........................... 20 M-NET Address Settings ........................21 2-4-1 Address Settings List ..........................21 2-4-2 Outdoor Unit Power Jumper Connector Connection................22 2-4-3 Outdoor Unit Centralized Controller Switch Setting ................22 2-4-4 Room Temperature Detection Position Selection .................
Page 25 HWE14080 - 16 -...
Page 26: System Configurations
36 - 93 P06 - P96models R410A series indoor units 48 - 124 60 - 156 72 - 187 72 - 187 84 - 218 84 - 218 96 - 249...
Page 27: Types And Maximum Allowable Length Of Cables
[2-2 Types and Maximum Allowable Length of Cables ] Types and Maximum Allowable Length of Cables 1. Wiring work (1) Notes 1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man- ual.
Page 28 [2-2 Types and Maximum Allowable Length of Cables ] Types and maximum allowable length of cables Control lines are categorized into 2 types: transmission line and remote controller line. Use the appropriate type of cables and observe the maximum allowable length specified for a given system. If a given system has a long transmission line or if a noise source is located near the unit, place the unit away from the noise source to reduce noise interference.
Page 29: Switch Settings
[2-3 Switch Settings ] Switch Settings 1. Switch setting The necessary switch settings depend on system configuration. Before performing wiring work, refer to the following page(s). [2-7 Example System with an MA Remote Controller](page 30) [2-8 Example System with an ME Remote Controller](page 40) [2-9 Example System with an MA and an ME Remote Controller](page 42) If the switch settings are changed while the unit is being powered, those changes will not take effect, and the unit will not function properly.
Page 30: M-Net Address Settings
[2-4 M-NET Address Settings ] M-NET Address Settings 2-4-1 Address Settings List 1. M-NET Address settings (1) Address settings table The need for address settings and the range of address setting depend on the configuration of the system. Unit or controller Symbol Address Setting method...
Page 31: Outdoor Unit Power Jumper Connector Connection
[2-4 M-NET Address Settings ] 2-4-2 Outdoor Unit Power Jumper Connector Connection System configu- Connection to Power supply unit Group operation Power supply switch connector connection ration the system con- for transmission of units in a sys- troller lines tem with multiple outdoor units System with Leave CN41 as it is...
Page 32: Start/Stop Control Of Indoor Units
[2-4 M-NET Address Settings ] 2-4-5 Start/Stop Control of Indoor Units Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10. *4 *5 Setting (SW1) Operation of the indoor unit when the operation is resumed after the unit was Function stopped Power ON/OFF by...
Page 33: Various Control Methods Using The Signal Input/Output Connector On Outdoor Unit
[2-4 M-NET Address Settings ] 2-4-7 Various Control Methods Using the Signal Input/Output Connector on Outdoor Unit (1) Various connection options Terminal Type Usage Function to be Option used Input Prohibiting cooling/heating operation (thermo OFF) by an external DEMAND (level) CN3D Adapter for input to the outdoor unit.
Page 34 [2-4 M-NET Address Settings ] (2) Example of wiring connection CAUTION 1) Wiring should be covered by insulation tube with supplementary insulation. 2) Use relays or switches with IEC or equivalent standard. 3) The electric strength between accessible parts and control circuit should have 2750V or more. (1) CN51 (2) CN3S Outdoor unit...
Page 35: Demand Control Overview
[2-5 Demand Control Overview ] Demand Control Overview (1) General outline of control Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the outdoor units (OC, OS1, and OS2). Between 2 and 12 steps of demand control is possible by setting DIP SW6-8 on the outdoor units (OC, OS1, and OS2). DipSW6-8 Demand control switch Input to CN3D *2...
Page 36 [2-5 Demand Control Overview ] (*3) 2) When SW6-8 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND) CN3D 1-2P CN3D 1-3P Open Short-circuit Open 100% (No DEMAND) Short-circuit 0% (Compressor OFF) *3.
Page 37: System Connection Example
[2-6 System Connection Example ] System Connection Example Examples of typical system connection are shown below. Refer to the Installation Manual that came with each device or controller for details. (1) An example of a system to which an MA remote controller is connected System Address start up for in- Connection to the system controller...
Page 38 [2-6 System Connection Example ] HWE14080 - 29 -...
Page 39: Example System With An Ma Remote Controller
[2-7 Example System with an MA Remote Controller ] Example System with an MA Remote Controller 2-7-1 Single Refrigerant System (Automatic Indoor/Outdoor Address Startup) (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Leave the male Group Group...
Page 40 [2-7 Example System with an MA Remote Controller ] MA remote controller function selection or the installation (4) Wiring method manual for the MA remote controller for the setting meth- 1) Indoor/outdoor transmission line od.) Daisy-chain terminals M1 and M2 on the terminal block Group operation of indoor units for indoor-outdoor transmission line (TB3) on the outdoor To perform a group operation of indoor units (IC), daisy-...
Page 41: Single Refrigerant System With Two Or More Lossnay Units
[2-7 Example System with an MA Remote Controller ] 2-7-2 Single Refrigerant System with Two or More LOSSNAY Units (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Leave the male Group Group connector on connector on connector on...
Page 42 [2-7 Example System with an MA Remote Controller ] Connect terminals M1 and M2 on the terminal block (4) Wiring method (TB5) on the indoor unit (IC) to the appropriate terminals 1) Indoor/outdoor transmission line on the terminal block (TB5) on LOSSNAY (LC). (Non-po- larized two-wire) Same as 2-7-1 Interlock setting between the indoor units and LOSS-...
Page 43: Grouped Operation Of Units In Separate Refrigerant Circuits
[2-7 Example System with an MA Remote Controller ] 2-7-3 Grouped Operation of Units in Separate Refrigerant Circuits (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male Group from CN41 to CN40. Group Group connector on...
Page 44 [2-7 Example System with an MA Remote Controller ] a power failure, daisy-chain TB7 of OC, OS1, and OS2. (4) Wiring method (If there is a problem with the outdoor unit whose power 1) Indoor/outdoor transmission line jumper was moved from CN41 to CN40, centralized con- trol is not possible, even if TB7's are daisy-chained).
Page 45: System With A Connection Of System Controller To Centralized Control Transmission Line
[2-7 Example System with an MA Remote Controller ] 2-7-4 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring An example of a system in which a system controller is connected to the transmission cable for the centralized control system and the power is supplied from the outdoor unit Interlock operation with the ventilation unit...
Page 46 [2-7 Example System with an MA Remote Controller ] trol is not possible, even if TB7's are daisy-chained). (4) Wiring method c) When connecting TB7, only commence after checking 1) Indoor/outdoor transmission line that the voltage is below 20 VDC. Same as 2-7-1 Only use shielded cables.
Page 47: System With A Connection Of System Controller To Indoor-Outdoor Transmission Line
[2-7 Example System with an MA Remote Controller ] 2-7-5 System with a Connection of System Controller to Indoor-Outdoor Transmission Line (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
Page 48 [2-7 Example System with an MA Remote Controller ] same refrigerant circuit, connect the transmission line for (4) Wiring method centralized control to TB7 on the OC (Note a). To maintain centralized control even during an OC failure or a power fail- 1) Indoor/outdoor transmission line ure, daisy-chain TB7 of OC, OS1, and OS2.
Page 49: Example System With An Me Remote Controller
[2-8 Example System with an ME Remote Controller ] Example System with an ME Remote Controller 2-8-1 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
Page 50 [2-8 Example System with an ME Remote Controller ] When 2 remote controllers are connected to the sys- (4) Wiring method 1) Indoor/outdoor transmission line Refer to the section on Switch Setting. Same as 2-7-1 Performing a group operation (including the group Shielded cable connection operation of units in different refrigerant circuits).
Page 51: Example System With An Ma And An Me Remote Controller
[2-9 Example System with an MA and an ME Remote Controller ] Example System with an MA and an ME Remote Controller 2-9-1 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring Leave the male Leave the male Move the male connector Group...
Page 52 [2-9 Example System with an MA and an ME Remote Controller ] Same as 2-7-1 (4) Wiring method Group operation of indoor units 1) Indoor/outdoor transmission line Same as 2-7-1 Same as 2-7-1 4) M-NET remote controller wiring Shielded cable connection Same as 2-7-1 Same as 2-7-1 When 2 remote controllers are connected to the sys-...
Page 53: 2-10 Restrictions On Refrigerant Pipes
[2-10 Restrictions on Refrigerant Pipes ] 2-10 Restrictions on Refrigerant Pipes 2-10-1 Restrictions on Refrigerant Pipe Length (1) P72 - P168 models Outdoor unit Branch header First branch (Branch joint) Indoor Indoor Indoor Branch joint Indoor Indoor Indoor Unit: m [ft] Allowable length of Operation Pipe sections...
Page 54 [2-10 Restrictions on Refrigerant Pipes ] (2) P144 - P360 models The figure shows a system with three outdoor units. (P264-P360 models) Provide a trap on the pipe (gas pipe only) within 2 m from the Note1 Install the pipe that connects the branch pipe and the outdoor units in joint pipe if the total length of the pipe that connects the joint the way that it has a downward inclination toward the branch pipe.
Page 55: Restrictions On Refrigerant Pipe Size
[2-10 Restrictions on Refrigerant Pipes ] 2-10-2 Restrictions on Refrigerant Pipe Size (1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size) Outdoor unit set name Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] (total capacity) 72 model ø9.52 [3/8"]...
Page 56 [2-10 Restrictions on Refrigerant Pipes ] (4) Size of the refrigerant pipe between the first distributor and the second distributor Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] ø19.05 [3/4"] ø34.93 [1-3/8"] (5) Size of the refrigerant pipe between the first distributor or the second distributor and outdoor units Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] 72 model ø9.52 [3/8"]...
Page 57 [2-10 Restrictions on Refrigerant Pipes ] HWE14080 - 48 -...
Page 58: Chapter 3 Major Components, Their Functions And Refrigerant Circuits
Chapter 3 Major Components, Their Functions and Refrigerant Circuits External Appearance and Refrigerant Circuit Components of Outdoor Unit........ 51 3-1-1 External Appearance of Outdoor Unit ....................51 3-1-2 Outdoor Unit Refrigerant Circuits......................53 Outdoor Unit Refrigerant Circuit Diagrams..................56 Functions of the Major Components of Outdoor Unit..............57 Functions of the Major Components of Indoor Unit................
Page 59 HWE14080 - 50 -...
Page 60: External Appearance And Refrigerant Circuit Components Of Outdoor Unit
[3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] 3 Major Components, Their Functions and Refrigerant Circuits External Appearance and Refrigerant Circuit Components of Outdoor Unit 3-1-1 External Appearance of Outdoor Unit (1) PUHY-P72, P96TLMU PUHY-P72, P96YLMU Fan guard Fan guard Fan guard Fin guard...
Page 61 [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] (2) PUHY-P120, P144, P168TLMU PUHY-P120, P144, P168YLMU Fan guards Fan guards Fans Fans Side panel Side panel Fin guard Fin guard Control box Control box Fan box Fan box Heat exchanger Heat exchanger Side panel...
Page 62: Outdoor Unit Refrigerant Circuits
[3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] 3-1-2 Outdoor Unit Refrigerant Circuits (1) PUHY-P72TLMU PUHY-P72YLMU High-pressure switch Solenoid valve (SV2) High-pressure sensor (63H1) (63HS1) Check valve Low-pressure sensor (CV1) (63LS) 4-way valve (21S4b) 4-way valve (21S4a) Linear expansion Transformer box Transformer box...
Page 63 [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] (2) PUHY-P96TLMU PUHY-P96YLMU Solenoid valve (SV2) Solenoid valve (SV2) High-pressure switch (63H1) High-pressure switch (63H1) High-pressure sensor (63HS1) High-pressure sensor (63HS1) Check valve (CV1) Check valve (CV1) 4-way valve 4-way valve (21S4b) (21S4b)
Page 64 [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] (3) PUHY-P120, P144, P168TLMU PUHY-P120, P144, P168YLMU 4-way valve 4-way valve (21S4a) Check valve (CV1) (21S4b) High-pressure sensor (63HS1) Solenoid Low-pressure check joint valve (SV2) 2-way valve (SV5b) High-pressure swich (63H1) Subcool coil Accumulator Linear expansion valve...
Page 65: Outdoor Unit Refrigerant Circuit Diagrams
[3-2 Outdoor Unit Refrigerant Circuit Diagrams ] Outdoor Unit Refrigerant Circuit Diagrams (1) PUHY-P72, P96 models 63LS 21S4b 21S4a 63H1 63HS1 Motor SV1a Comp LEV2b LEV2a LEV1 (2) PUHY-P120, P144, P168 models 21S4c 63LS 21S4b HEX2 21S4a FAN2 (for HEX2) Motor 63H1 63HS...
Page 66: Functions Of The Major Components Of Outdoor Unit
[3-3 Functions of the Major Components of Outdoor Unit ] Functions of the Major Components of Outdoor Unit Part Symbols Notes Usage Specifications Check method name (functions) Com- Adjusts the amount of cir- P72, 96 models pressor (Comp1) culating refrigerant by ad- Low-pressure shell scroll com- justing the operating pressor...
Page 67 [3-3 Functions of the Major Components of Outdoor Unit ] Part Symbols Notes Usage Specifications Check method name (functions) Thermis- 1) Detects discharge air Degrees Celsius Resistance check (Discharge) temperature = 7.465k = 4057 2) Provides high-pres- 25/120 sure protection 7.465 4057 0°C[32°F] :698k...
Page 68 [3-3 Functions of the Major Components of Outdoor Unit ] Part Symbols Notes Usage Specifications Check method name (functions) Solenoid SV1a 1) High/low pressure by- AC208-230V Continuity check valve Discharge-suc- Open while being powered/ with a tester pass at start-up and tion closed while not being powered stopping, and capacity...
Page 69: Functions Of The Major Components Of Indoor Unit
[3-4 Functions of the Major Components of Indoor Unit ] Functions of the Major Components of Indoor Unit Part Symbol Notes Usage Specification Check method Name (functions) Linear 1) Adjusts superheat at the DC12V Refer to the section expan- Opening of stepping motor "Continuity Test with a indoor heat exchanger sion valve...
Page 70: Chapter 4 Electrical Components And Wiring Diagrams
Chapter 4 Electrical Components and Wiring Diagrams Outdoor Unit Circuit Board Arrangement..................63 4-1-1 Outdoor Unit Control Box........................63 4-1-2 Transformer Box ........................... 66 4-1-3 Fan Box..............................67 Outdoor Unit Circuit Board Components ..................68 4-2-1 Control Board............................68 4-2-2 M-NET Board (Transmission Power Supply Board) ................
Page 71 HWE14080 - 62 -...
Page 72: Outdoor Unit Circuit Board Arrangement
[4-1 Outdoor Unit Circuit Board Arrangement ] 4 Electrical Components and Wiring Diagrams Outdoor Unit Circuit Board Arrangement 4-1-1 Outdoor Unit Control Box <HIGH VOLTAGE WARNING> Control box houses high-voltage parts. When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
Page 73 [4-1 Outdoor Unit Circuit Board Arrangement ] (2) PUHY-P168TLMU Rush current FAN board protection resistor INV board Control board (R1) Note 2 DC reactor (DCL) Electromagnetic contactor (72C) Diode stack Noise filter Note 2 Current sensor (DCCT1) Terminal block M-NET board for power supply (TB1) Ground...
Page 74 [4-1 Outdoor Unit Circuit Board Arrangement ] (3) PUHY-P72, P96, P120, P144, P168YLMU Capacitor Electromagnetic relay Rush current protection resistor (R1, R5) Note 2 (72C) (C100) Control board FAN board DC reactor (DCL) Noise filter Note 2 M-NET board Terminal block for power supply (TB1) Fuse (F4)
Page 75: Transformer Box
[4-1 Outdoor Unit Circuit Board Arrangement ] 4-1-2 Transformer Box (1) Transformer Box (PUHY-P72, P96, P120, P144, P168YLMU) Transformer (T02) Transformer (T03) HWE14080 - 66 -...
Page 76: Fan Box
[4-1 Outdoor Unit Circuit Board Arrangement ] 4-1-3 Fan Box (1) PUHY-P120, P144, P168TLMU PUHY-P120, P144, P168YLMU FAN board Connector board Note 1 1. Handle the fan box with care. If the front or the bottom panel becomes damaged, water or dust may enter the fan box, dam- aging its internal parts.
Page 77: Outdoor Unit Circuit Board Components
[4-2 Outdoor Unit Circuit Board Components ] Outdoor Unit Circuit Board Components 4-2-1 Control Board 16 VDC CN4/4A GND(FAN INV board 1) 5 VDC output CN2/2A 17 VDC CN332 Serial communication 17 VDC CN801 signal input Serial communication 18 VDC output GND(INV board) GND(FAN INV board 2) Pressure switch connection...
Page 78: M-Net Board (Transmission Power Supply Board)
[4-2 Outdoor Unit Circuit Board Components ] 4-2-2 M-NET Board (Transmission Power Supply Board) CNS2 CNIT CN102 12VDC Input Transmission line Power supply output for centralized input/output for control system (30VDC) 5VDC Input centralized control CN04 Indoor/outdoor transmission line Power supply system (30VDC) detection output Bus voltage input...
Page 79: Inv Board
[4-2 Outdoor Unit Circuit Board Components ] 4-2-3 INV Board (1) PUHY-P72, P96, P120, P144TLMU LED4 Lit during normal CNFAN CNVDC CPU operation Serial signal output Bus voltage output Bus voltage output N GND (FAN board) F001 17VDC input P LED1 Serial communication signal input Fuse...
Page 80 [4-2 Outdoor Unit Circuit Board Components ] (2) PUHY-P168TLMU 1) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter- minals to remove them. 2) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
Page 81 [4-2 Outdoor Unit Circuit Board Components ] (3) PUHY-P72, P96, P120, P144, P168YLMU 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
Page 82: Fan Board
[4-2 Outdoor Unit Circuit Board Components ] 4-2-4 Fan Board (1) PUHY-P72, P96, P120, P144, P168TLMU 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
Page 83 [4-2 Outdoor Unit Circuit Board Components ] (2) PUHY-P72, P96, P120, P144, P168YLMU LED1 LED4 Lit: Inverter operation Microcomputer in operation (Lit) Blinking: Inverter error RSH02 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
Page 84: Noise Filter
[4-2 Outdoor Unit Circuit Board Components ] 4-2-5 Noise Filter (1) PUHY-P72, P96, P120, P144TLMU TB32 CN110 Bus voltage input (P) Power supply detection Ground CN72C signal output 72C drive signal input X001 CN012 Electromagnetic Output relay (72C) TB31 Bus voltage output (P) CNR1 Rush current protection...
Page 85 [4-2 Outdoor Unit Circuit Board Components ] (2) PUHY-P168TLMU F003 CN110 TB31 Fuse CN72C Power supply detection Bus voltage output (P) Ground 250 VAC 6.3A T 72C drive input signal output X001 Electromagnetic relay (72C) CNR1 Rush current protection registor (R1) connection TB42 Bus voltage output (N)
Page 86 [4-2 Outdoor Unit Circuit Board Components ] (3) PUHY-P72, P96, P120, P144, P168YLMU Output Output (Rectified L2-L3 current) (Rectified L2-L3 current) Input Surge absorber circuit Surge absorber circuit Short circuit Short circuit Grounding F1,F2,F3,F4 Fuse 250VAC 6.3A Grounding CN1A Input CN1B TB21 TB22...
Page 87: Connect Board
[4-2 Outdoor Unit Circuit Board Components ] 4-2-6 Connect Board 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
Page 88: Outdoor Unit Electrical Wiring Diagrams
[4-3 Outdoor Unit Electrical Wiring Diagrams ] Outdoor Unit Electrical Wiring Diagrams (1) PUHY-P72, P96TLMU HWE14080 - 79 -...
Page 89 [4-3 Outdoor Unit Electrical Wiring Diagrams ] (2) PUHY-P120, P144TLMU HWE14080 - 80 -...
Page 90 [4-3 Outdoor Unit Electrical Wiring Diagrams ] (3) PUHY-P168TLMU HWE14080 - 81 -...
Page 91 [4-3 Outdoor Unit Electrical Wiring Diagrams ] (4) PUHY-P72, P96YLMU HWE14080 - 82 -...
Page 92 [4-3 Outdoor Unit Electrical Wiring Diagrams ] (5) PUHY-P120, P144, P168YLMU HWE14080 - 83 -...
Page 93: Transmission Booster Electrical Wiring Diagrams
[4-4 Transmission Booster Electrical Wiring Diagrams ] Transmission Booster Electrical Wiring Diagrams Terminal block for power supply (TB1) 250V 2A Red Red Red Black White White Green/Yellow AC208V/230V Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply Blue Black Grounding...
Page 94: Chapter 5 Control
Chapter 5 Control Dipswitch Functions and Factory Settings ..................87 5-1-1 Outdoor Unit Switch Functions and Factory Settings ................87 5-1-2 Indoor Unit Switch Functions and Factory Settings ................91 5-1-3 Remote Controller Switch Functions and Factory Settings..............92 Outdoor Unit Control .......................... 94 5-2-1 Overview ...............................
Page 95 HWE14080 - 86 -...
Page 96: Dipswitch Functions And Factory Settings
[5-1 Dipswitch Functions and Factory Settings ] 5 Control Dipswitch Functions and Factory Settings 5-1-1 Outdoor Unit Switch Functions and Factory Settings (1) Control board Function according to switch setting Units that require Switch Function Switch setting timing switch setting (Note 2) Unit address set- Set to 00 or 51-100 with the dial switch...
Page 97 [5-1 Dipswitch Functions and Factory Settings ] (2) Additional dipswitch settings at time of shipment Function according to switch setting Units that require Switch Function Switch setting timing switch setting OFF (LED3 Unlit) ON (LED3 Lit) (Note 2) Refer to the following page(s). [9 LED Status Indicators on SW6-10: 1-10 Self-diagnosis/operation monitor...
Page 98 [5-1 Dipswitch Functions and Factory Settings ] (3) INV board 1) PUHY-P72, P96, P120, P144, P168YLMU Functions are switched with the following connector. Function according to connec- Connector Function Setting timing Enabled Disabled CN6 short- Enabling/disabling the following error Error detec- Error detec- Anytime after power on circuit con-...
Page 99 [5-1 Dipswitch Functions and Factory Settings ] (4) Fan board (Control box side, Fan box side) Function according to switch setting Switch Function Switch setting timing Enabling/Disabling no-load operation No-load oper- No-load oper- Anytime after power on No-load operation will continue for ap- ation disabled ation enabled proximately 30 seconds, and then the unit...
Page 100: Indoor Unit Switch Functions And Factory Settings
[5-1 Dipswitch Functions and Factory Settings ] 5-1-2 Indoor Unit Switch Functions and Factory Settings (1) Dipswitches 1) SW1,3 Function according to switch setting Switch setting timing Switch Function Notes Set to ON (built-in sensor on the remote controller) Room temperature Built-in sensor on Indoor unit inlet on All Fresh (PEFY-VMH-F) model units...
Page 101: Remote Controller Switch Functions And Factory Settings
[5-1 Dipswitch Functions and Factory Settings ] 5-1-3 Remote Controller Switch Functions and Factory Settings (1) MA remote controller (PAR-20MAU) The SW is located at the bottom of the remote controller under the cover. Operate the switches to perform the remote con- troller main/sub setting or other function settings.
Page 102 [5-1 Dipswitch Functions and Factory Settings ] (2) ME remote controller (PAR-F27MEA-US) Set the address of the remote controller with the rotary switch. Rotary switch 10's digit 1's digit (left) (right) Remote controller unit Example: In case of address 108 Address setting range Setting method Main remote controller...
Page 103: Outdoor Unit Control
[5-2 Outdoor Unit Control ] Outdoor Unit Control 5-2-1 Overview The outdoor units are designated as OC, OS1 and OS2 in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large). The setting of outdoor unit can be verified by using the self-diagnosis switch (SW4).
Page 104: Refrigerant Bypass Control
[5-2 Outdoor Unit Control ] 5-2-5 Refrigerant Bypass Control Bypass solenoid valves (SV1a), which bypass the high- and low- pressure sides, perform the following functions. (1) Bypass solenoid valve (SV1a) (ON = Open), (SV9) (ON = Open), (SV2) (ON = Open) SV1a Operation When starting-up the compressor of each...
Page 105: Frequency Control
[5-2 Outdoor Unit Control ] 5-2-6 Frequency Control Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temperature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi]) during heating operation.
Page 106: Defrost Operation Control
[5-2 Outdoor Unit Control ] 5-2-7 Defrost Operation Control (1) Starting the defrost operation The defrost cycle will start when all of the three conditions (outside temperature, cumulative compressor operation time, and pipe temperature) under <Condition 1>, <Condition 2>, or <Condition 3> are met. Condition 1 Condition 2 Condition 3...
Page 107 [5-2 Outdoor Unit Control ] (3) Stopping the defrost operation The defrost cycle ends when 12 minutes have passed since the beginning of the cycle, or when the pipe temperature (TH3) has been continuously detected for 4 minutes (when SW4 (916) is set to OFF) or 2 minutes (when SW4 (916) is set to ON) that exceeds the values in the table below.
Page 108: Refrigerant Recovery Control
[5-2 Outdoor Unit Control ] 5-2-8 Refrigerant Recovery Control Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heating mode with thermo off. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat ex- changer.
Page 109: Outdoor Unit Fan Control
[5-2 Outdoor Unit Control ] 5-2-9 Outdoor Unit Fan Control (1) Control method Depending on the capacity required, the rotation speed of the outdoor unit fan is controlled by the inverter, targeting a constant evaporation temperature of (0°C [32°F]= 0.71 MPa [103 psi]) during cooling operation and constant condensing temperature of (49°C [120°F]= 2.88 MPa [418 psi]) during heating operation.
Page 110 [5-2 Outdoor Unit Control ] (2) P144, P168, P192, P216, P240 models Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P96 or above. (*1 Qj The compressor on the OC starts up.
Page 111 [5-2 Outdoor Unit Control ] (3) P264, P288, P312, P336, P360 models Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P96 or above. ( *1 The total operating load of the indoor unit after 5 minutes of operation is between P96 and P400.
Page 112: Emergency Operation Mode
[5-2 Outdoor Unit Control ] 5-2-13 Emergency Operation Mode 1. Problems with the outdoor unit Emergency operation mode is a temporary operation mode in which the outdoor unit that is not in trouble operates when one of the outdoor units in the P144 through P240 models is in trouble or when one or two of the outdoor units in the P264 througt P360 models are in trouble.
Page 113 [5-2 Outdoor Unit Control ] (2) Ending the emergency operation 1) End conditions When one of the following conditions is met, emergency operation stops, and the unit makes an error stop. When the integrated operation time of compressor in cooling mode has reached four hours. When the integrated operation time of compressor in heating mode has reached two hours.
Page 114 [5-2 Outdoor Unit Control ] Emergency operation pattern (2 outdoor units) OC failure OS failure pattern pattern Trouble Normal Normal Trouble Cooling Emergency Permitted Permitted operation Heating Permitted Permitted Capacity that matches Maximum total capacity the total capacity of the of indoor units (Note 1) operable outdoor units Emergency operation pattern (3 outdoor units)
Page 115: Operation Mode
[5-2 Outdoor Unit Control ] 5-2-14 Operation Mode (1) Indoor unit operation mode The operation mode can be selected from the following 5 modes using the remote controller. Cooling mode Heating mode Dry mode Fan mode Stopping mode (2) Outdoor unit operation mode Cooling mode All indoor units in operation are in cooling mode.
Page 116: Operation Flowcharts
[5-3 Operation Flowcharts ] Operation Flowcharts 5-3-1 Operation Sequence Flowchart (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Unit in the stopped state turned on From outdoor unit Operation SW turned on 1. Protection function self-holding cancelled.
Page 117 [5-3 Operation Flowcharts ] (2) Outdoor unit (cooling and heating modes) Start Normal operation Error Breaker Unit in the stopped state turned on "HO" / "PLEASE WAIT" blinks on the remote controller *Note 1 Indoor units registered to the remote controller From indoor unit Operation command...
Page 118: Actions Performed In Different Modes
[5-3 Operation Flowcharts ] 5-3-2 Actions Performed in Different Modes (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat ON 3-minute restart prevention 1.
Page 119 [5-3 Operation Flowcharts ] (2) Heating operation Normal operation Defrost operation Heating operation Unit in the stopped state *Note 1,2 During test run mode Defrost operation 4-way valve ON 4-way valve OFF 1. Indoor unit fan stops 2. Inverter defrost frequency control Test run mode 3.
Page 120 [5-3 Operation Flowcharts ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18°C[64°F] *Note 1 1. Indoor unit fan stop 1. Outdoor unit (compressor) 2.
Page 121 [5-3 Operation Flowcharts ] HWE14080 - 112 -...
Page 122: Chapter 6 Test Run
Chapter 6 Test Run Read before Test Run........................115 MA and ME Remote Controller Functions and Specifications ............. 116 6-2-1 Function/Specification Comparison ....................116 6-2-2 Local Remote Controller Selection Tips....................116 Making the Group and Interlock Settings from an ME Remote Controller........117 6-3-1 Overview .............................
Page 123 HWE14080 - 114 -...
Page 124: Read Before Test Run
[6-1 Read before Test Run ] 6 Test Run Read before Test Run (1) Check for refrigerant leak and loose cables and connectors. (2) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
Page 125: Ma And Me Remote Controller Functions And Specifications
[6-2 MA and ME Remote Controller Functions and Specifications ] MA and ME Remote Controller Functions and Specifications There are two types of remote controllers: ME remote controller, which is connected on the indoor-outdoor transmission line, and MA remote controller, which is connected to each indoor unit. 6-2-1 Function/Specification Comparison *1*2...
Page 126: Making The Group And Interlock Settings From An Me Remote Controller
[6-3 Making the Group and Interlock Settings from an ME Remote Controller ] Making the Group and Interlock Settings from an ME Remote Controller 6-3-1 Overview Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the indoor/outdoor unit address.
Page 127 [6-3 Making the Group and Interlock Settings from an ME Remote Controller ] (A) Group Settings (B) Interlock Settings Bring up the Group Setting window. Bring up the Interlock Setting window. -Press and hold buttons [FILTER] and [LOUVER] -Press button [MODE] to bring up the following display.
Page 128: Address Search
[6-3 Making the Group and Interlock Settings from an ME Remote Controller ] 6-3-3 Address Search To search for the address of indoor units that have been entered into the remote controller, follow steps (A) To search group settings (B) Interlock setting search After performing step , proceed as follows: Bring up the Group Setting window.
Page 129: Address Deletion
[6-3 Making the Group and Interlock Settings from an ME Remote Controller ] 6-3-4 Address Deletion The addresses of the indoor units that have been entered into the remote controller can be deleted by deleting the group settings. The interlock settings between units can be deleted by deleting the interlock settings. Follow the steps in section 6-3-3 “Address Search”...
Page 130: Selecting Remote Controller Functions From An Me Remote Controller
[6-4 Selecting Remote Controller Functions from an ME Remote Controller ] Selecting Remote Controller Functions from an ME Remote Controller In the remote controller function selection mode, the settings for three types of functions can be made or changed as necessary. 1) Operation mode display selection mode (Display or non-display of COOL/HEAT during automatic operation mode) When the automatic operation mode is selected, the indoor unit will automatically perform a cooling or heating operation based on the room temperature.
Page 131 [6-4 Selecting Remote Controller Functions from an ME Remote Controller ] [Operation Procedures] 1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal display).
Page 132: Making Interlock Settings From An Ma Remote Controller
[6-5 Making Interlock Settings from an MA Remote Controller ] Making Interlock Settings from an MA Remote Controller LOSSNAY interlock setting (Make this setting only when necessary.) 6-5-1 MA Remote Controller (PAR-21MAAU) * When the upper controller is connected, make the setting using the upper controller. NOTE: When using LOSSNAY units in conjunction, interlock the addresses of all indoor units within the group and address of LOSSNAY units.
Page 133 [6-5 Making Interlock Settings from an MA Remote Controller ] < 2. Search Procedures > To search for the LOSSNAY unit that is interlocked with a particular indoor unit, enter the address of the indoor unit into the remote controller that is connected to it.
Page 134: Changing The Room Temperature Detection Position
[6-6 Changing the Room Temperature Detection Position ] Changing the Room Temperature Detection Position 1. Selecting the position of temperature detection (Factory setting: SW1-1 on the controller board on the indoor unit is set to OFF.) To use the built-in sensor on the remote controller, set the SW1-1 on the controller board on the indoor unit to ON. Some models of remote controllers are not equipped with a built-in temperature sensor.
Page 135: Test Run Method
[6-7 Test Run Method ] Test Run Method 6-7-1 MA Remote Controller (PAR-21MAAU) The figure shows an MA remote controller (PAR-21MAAU). ON/OFF button Set Temperature buttons Down Fan Speed button TIME SUN MON TUE WED THU FRI SAT TIMER AFTER AFTER ERROR CODE FUNCTION...
Page 136: Operation Characteristics And Refrigerant Charge
[6-8 Operation Characteristics and Refrigerant Charge ] Operation Characteristics and Refrigerant Charge It is important to have a clear understanding of the characteristics of refrigerant and the operating characteristics of air conditioners before attempting to adjust the refrigerant amount in a given system. The following table shows items of particular importance.
Page 137: The Amount Of Refrigerant To Be Added
[6-9 Evaluating and Adjusting Refrigerant Charge ] 6-9-3 The Amount of Refrigerant to Be Added The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Outdoor unit model P120 P144...
Page 138 [6-9 Evaluating and Adjusting Refrigerant Charge ] 1) Maximum refrigerant charge There is a limit to the amount of refrigerant that can be charged into a unit. Regardless of the amount yielded by the formula above, observe the maximum refrigerant charge in the table below. Total index of the outdoor units P120 P144...
Page 139 [6-9 Evaluating and Adjusting Refrigerant Charge ] (2) Example: PUHY-P168T(Y)SLMU 9.52 9.52 (3 m) (1 m) 9.52 (10 m) 15.88 (10 m) × Liquid separator 9.52 9.52 9.52 9.52 6.35 (10 m) (20 m) (10 m) (10 m) (10 m) 15.88 (30 m) model model...
Page 140: Refrigerant Charge Adjustment Mode
[6-9 Evaluating and Adjusting Refrigerant Charge ] 6-9-4 Refrigerant Charge Adjustment Mode Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch (SW4 (922)) on the main board on the outdoor unit (OC only) is turned to ON, the unit goes into the refrigerant amount adjust mode, and the following sequence is followed.
Page 141 [6-9 Evaluating and Adjusting Refrigerant Charge ] Start Turn on SW4 (922) on the OC. Put all indoor units in the test run mode and run the units in cooling mode. Has the initial start-up mode been completed? Has it been at least 30 minutes since start up? Gradually add refrigerant from...
Page 142: 6-10 The Following Symptoms Are Normal
[6-10 The Following Symptoms Are Normal ] 6-10 The Following Symptoms Are Normal Remote controller Symptoms Cause display The indoor unit does not start "Cooling (heating)" The unit cannot perform a heating (cooling) operation when other indoor after starting cooling (heating) icon blinks on the units on the same refrigerant system, are performing a cooling (heating) operation.
Page 143: Standard Operation Data (Reference Data)
[6-11 Standard Operation Data (Reference Data) ] 6-11 Standard Operation Data (Reference Data) 6-11-1 Single Unit (Standard) Outdoor unit model PUHY-P72T(Y)LMU PUHY-P96T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating)
Page 144 [6-11 Standard Operation Data (Reference Data) ] Outdoor unit model PUHY-P120T(Y)LMU PUHY-P144T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit...
Page 145 [6-11 Standard Operation Data (Reference Data) ] Outdoor unit model PUHY-P168T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Indoor unit Number of units in operation Conditions Model Conditions...
Page 146: Dual Unit Combination (Standard)
[6-11 Standard Operation Data (Reference Data) ] 6-11-2 Dual Unit Combination (Standard) Packaged unit model PUHY-P144T(Y)SLMU Outdoor unit model PUHY-P72T(Y)LMU PUHY-P72T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit...
Page 147 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P168T(Y)SLMU Outdoor unit model PUHY-P72T(Y)LMU PUHY-P96T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 148 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P192T(Y)SLMU Outdoor unit model PUHY-P72T(Y)LMU PUHY-P120T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 149 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P216T(Y)SLMU Outdoor unit model PUHY-P96T(Y)LMU PUHY-P120T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 150 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P240T(Y)SLMU Outdoor unit model PUHY-P120T(Y)LMU PUHY-P120T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 151: Triple Unit Combination (Standard)
[6-11 Standard Operation Data (Reference Data) ] 6-11-3 Triple Unit Combination (Standard) Packaged unit model PUHY-P264T(Y)SLMU Outdoor unit model PUHY-P72T(Y)LMU PUHY-P72T(Y)LMU PUHY-P120T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/- Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected...
Page 152 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P288T(Y)SLMU Outdoor unit model PUHY-P72T(Y)LMU PUHY-P96T(Y)LMU PUHY-P120T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/- Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 153 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P312T(Y)SLMU Outdoor unit model PUHY-P72T(Y)LMU PUHY-P120T(Y)LMU PUHY-P120T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/- Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 154 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P336T(Y)SLMU Outdoor unit model PUHY-P96T(Y)LMU PUHY-P120T(Y)LMU PUHY-P120T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/- Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 155 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P360T(Y)SLMU Outdoor unit model PUHY-P96T(Y)LMU PUHY-P120T(Y)LMU PUHY-P144T(Y)LMU Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/- Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
Page 156: Chapter 7 Troubleshooting Using Error Codes
Chapter 7 Troubleshooting Using Error Codes Error Code and Preliminary Error Code Lists ................151 7-1-1 Inverter Protection Level Table ......................155 Error Code Definitions and Solutions: Codes [0 - 999] ..............156 7-2-1 Error Code [0403] ..........................156 7-2-2 Error Code [0404] ..........................
Page 157 7-5-28 Error Code [4260] (TLMU) ........................190 7-5-29 Error Code [4260] (YLMU) ........................190 Error Code Definitions and Solutions: Codes [5000 - 5999] ............191 7-6-1 Error Codes [5101, 5102, 5103, 5104]....................191 7-6-2 Error Codes [5102, 5103, 5104, 5105, 5106, 5107]................192 7-6-3 Error Code [5110] (TLMU) ........................
Page 158 7-8-2 Error Code [7101] ..........................227 7-8-3 Error Code [7102] ..........................228 7-8-4 Error Code [7105] ..........................229 7-8-5 Error Code [7106] ..........................229 7-8-6 Error Code [7110] ..........................230 7-8-7 Error Code [7111] ..........................230 7-8-8 Error Code [7113] ..........................231 7-8-9 Error Code [7117] ..........................
Page 159 HWE14080 - 150 -...
Page 160: Error Code And Preliminary Error Code Lists
[7-1 Error Code and Preliminary Error Code Lists ] 7 Troubleshooting Using Error Codes Error Code and Preliminary Error Code Lists Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4300 0403 4305 Serial communication error/Panel communication error (page 156)
Page 161 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Backup operation [101] IPM error (page 185) [103] DCCT overcurrent (H/W detection) (page 187) 4250 4350 [104]...
Page 162 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Backup operation [115] ACCT sensor fault (page 195) [116] DCCT sensor fault (page 197) 5301 4300 [117]...
Page 163 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 7106 Attribute setting error (page 229) Connection information signal transmission/reception er- 7110 (page 230) 7111 Remote controller sensor fault (page 230)
Page 164: Inverter Protection Level Table
[7-1 Error Code and Preliminary Error Code Lists ] 7-1-1 Inverter Protection Level Table Overload Current effective Temperature Current peak value INV board Outdoor units protection value error protection TOL error (Apeak) Imax (Arms) (Arms) (°C) PUHY-P72TLMU PUHY-P96TLMU INV24 PUHY-P120TLMU PUHY-P144TLMU INV25 PUHY-P168TLMU...
Page 165: Error Code Definitions And Solutions: Codes [0 - 999]
[7-2 Error Code Definitions and Solutions: Codes [0 - 999] ] Error Code Definitions and Solutions: Codes [0 - 999] 7-2-1 Error Code [0403] 1. Error code definition Serial communication error 2. Error definition and error detection method Serial communication error between the control board and the INV board on the compressor, and between the control board and the Fan board Detail code 1: Between the control board and the INV board Detail code 5, 6: Between the control board and the Fan board...
Page 166: Error Code [0404]
[7-2 Error Code Definitions and Solutions: Codes [0 - 999] ] 7-2-2 Error Code [0404] 1. Error code definition A control communication reception error 2. Error definition and error detection method Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board. 3.
Page 167: Error Code Definitions And Solutions: Codes [1000 - 1999]
[7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] Error Code Definitions and Solutions: Codes [1000 - 1999] 7-3-1 Error Code [1102] 1. Error code definition Discharge temperature fault 2. Error definition and error detection method 1) If the discharge temperature of 120 °C [248°F] or more is detected during the above operation (the first detection), the outdoor unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically.
Page 168: Error Code [1301]
[7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-2 Error Code [1301] 1. Error code definition Low pressure fault 2. Error definition and error detection method When starting the compressor from Stop Mode for the first time if low pressure reads 0.098MPa [14psi] immediately before start-up, the operation immediately stops.
Page 169: Error Code [1302] (During Operation)
[7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-3 Error Code [1302] (during operation) 1. Error code definition High pressure fault 1 (Outdoor unit) 2. Error definition and error detection method 1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the out- door stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.
Page 170: Error Code [1302] (At Startup)
[7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-4 Error Code [1302] (at startup) 1. Error code definition High pressure fault 2 (Outdoor unit) 2. Error definition and error detection method If the pressure of 0.098MPa [14psi] or lower is registered on the pressure sensor immediately before start-up, it will trigger an abnormal stop, and error code "1302"...
Page 171: Error Code Definitions And Solutions: Codes [2000 - 2999]
[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] Error Code Definitions and Solutions: Codes [2000 - 2999] 7-4-1 Error Code [2500] (Models with a drain sensor) 1. Error code definition Drain sensor submergence 2. Error definition and error detection method 1) If an immersion of the drain sensor in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.
Page 172: Error Code [2500] (Models With A Float Switch)
[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-2 Error Code [2500] (Models with a float switch) 1. Error code definition Drain sensor submergence 2. Error definition and error detection method 1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.
Page 173: Error Code [2502] (Models With A Drain Sensor)
[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-3 Error Code [2502] (Models with a drain sensor) 1. Error code definition Drain pump fault 2. Error definition and error detection method 1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water.
Page 174: Error Code [2502] (Models With A Float Switch)
[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-4 Error Code [2502] (Models with a float switch) 1. Error code definition Drain pump fault 2. Error definition and error detection method 1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch. Submergence of the sensor When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water.
Page 175: Error Code [2503]
[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-5 Error Code [2503] 1. Error code definition Drain sensor (Thd) fault 2. Error definition and error detection method If the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode.
Page 176: Error Code [2600]
[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-6 Error Code [2600] 1. Error code definition Water leakage 2. Cause, check method and remedy Check that water does not leak from the pipes in such as the humidifier. 7-4-7 Error Code [2601] 1.
Page 177: Error Code Definitions And Solutions: Codes [4000 - 4999]
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] Error Code Definitions and Solutions: Codes [4000 - 4999] 7-5-1 Error Code [4102] (TLMU) 1. Error code definition Open phase 2. Error definition and error detection method An open phase of the power supply was detected at power on. The open phase of the power supply may not always be detected if a power voltage from another circuit is applied.
Page 178: Error Code [4102] (Ylmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-2 Error Code [4102] (YLMU) 1. Error code definition Open phase 2. Error definition and error detection method An open phase of the power supply (L1 phase, L2 phase) was detected at power on. The L3 phase current is outside of the specified range.
Page 179: Error Code [4106]
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-3 Error Code [4106] 1. Error code definition <Transmission power supply fault Error detail code FF (Outdoor unit)> 2. Error definition and error detection method Transmission power output failure 3.
Page 180: Error Code [4115] (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-5 Error Code [4115] (TLMU) 1. Error code definition Power supply signal sync error 2. Error definition and error detection method The frequency cannot be determined when the power is switched on. 3.
Page 181: Error Code [4116]
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-7 Error Code [4116] 1. Error code definition RPM error/Motor error 2. Error definition and error detection method LOSSNAY The motor keep running even if the power is OFF. The thermal overload relay is ON.
Page 182: Error Code [4124]
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-9 Error Code [4124] 1. Error code definition Electric system not operate due to damper abnormality 2. Error definition and error detection method When the damper is not located at the designated position. 3.
Page 183: Error Codes [4220, 4225, 4226] Detail Code 108 (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-10 Error Codes [4220, 4225, 4226] Detail Code 108 (TLMU) 1. Error code definition Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 160V or less is detected during Inverter operation. (S/W detection) 3.
Page 184 [7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] For 4226 (For P120, P144 and P168 the fan board is applicable.) When the inverter is stopped, check the fan board ( CNVDC ) If above 253V, then check as below. 1) Check CN72C voltage Go to (3).
Page 185: Error Codes [4220, 4225, 4226] Detail Code 108 (Ylmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-11 Error Codes [4220, 4225, 4226] Detail Code 108 (YLMU) 1. Error code definition Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 289V or less is detected during Inverter operation. (S/W detection) 3.
Page 186 [7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] In case of 4226 (For P120, P144, and P168 type units, the fan box's fan board is applicable) Check the voltage at CNVDC on the Fan board while the inverter is stopped and if it is 420 V or above, check the following items.
Page 187: Error Codes [4220, 4225, 4226] Detail Code 109 (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-12 Error Codes [4220, 4225, 4226] Detail Code 109 (TLMU) 1. Error code definition Abnormal bus voltage rise (Detail code 109) 2. Error definition and error detection method If Vdc 400V is detected during inverter operation.
Page 188: Error Codes [4220, 4225, 4226] Detail Code 111 (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-15 Error Codes [4220, 4225, 4226] Detail Code 111 (TLMU) 1. Error code definition Logic error (Detail code 111) 2. Error definition and error detection method H/W error If only the H/W error logic circuit operates, and no identifiable error is detected. 3.
Page 189: Error Codes [4220, 4225, 4226] Detail Code 111 (Ylmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-16 Error Codes [4220, 4225, 4226] Detail Code 111 (YLMU) 1. Error code definition Logic error (Detail code 111) 2. Error definition and error detection method H/W error If only the H/W error logic circuit operates, and no identifiable error is detected. 3.
Page 190: Error Codes [4220, 4225, 4226] Detail Code 131
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-17 Error Codes [4220, 4225, 4226] Detail Code 131 1. Error code definition Low bus voltage at startup (Detail code 131) 2. Error definition and error detection method When Vdc 160 V is detected just before the inverter operation.
Page 191: Error Code [4230] (Ylmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-19 Error Code [4230] (YLMU) 1. Error code definition Heatsink overheat protection 2. Error definition and error detection method When the heat sink temperature (THHS) remains at or above 105°C [212°F] is detected. 3.
Page 192: Error Code [4240] (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-20 Error Code [4240] (TLMU) 1. Error code definition Overload protection 2. Error definition and error detection method If the output current of "(Iac) >Imax (Arms)" or "THHS > TOL" is continuously detected for 10 minutes during inverter operation. Refer to the relevant pages for the details of model names and the specified values.
Page 193: Error Code [4240] (Ylmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-21 Error Code [4240] (YLMU) 1. Error code definition Overload protection 2. Error definition and error detection method If the output current of "(Iac) >Imax (Arms)" or "THHS > TOL" is continuously detected for 10 minutes or more during inverter operation.
Page 194: Error Codes [4250, 4255, 4256] Detail Code 101 (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-22 Error Codes [4250, 4255, 4256] Detail Code 101 (TLMU) 1. Error code definition IPM error (Detail code 101) 2. Error definition and error detection method In the case of 4250 P72, P96, P120, P144 models Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board.
Page 195: Error Codes [4250, 4255, 4256] Detail Code 101 (Ylmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-23 Error Codes [4250, 4255, 4256] Detail Code 101 (YLMU) 1. Error code definition IPM error (Detail code 101) 2. Error definition and error detection method In the case of 4250 Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board.
Page 196: Error Code [4250] Detail Codes 103, 106, And 107 (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-24 Error Code [4250] Detail Codes 103, 106, and 107 (TLMU) 1. Error code definition DCCT overcurrent (H/W detection) (Detail code 103) Instantaneous overcurrent (Detail code 106) Overcurrent (effective value) (Detail code 107) 2.
Page 197: Error Codes [4250, 4255, 4256] Detail Code 104
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-25 Error Codes [4250, 4255, 4256] Detail Code 104 1. Error code definition Short-circuited IPM/Ground fault (Detail code 104) 2. Error definition and error detection method When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter. 3.
Page 198: Error Codes [4250, 4255, 4256] Detail Code 105
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-26 Error Codes [4250, 4255, 4256] Detail Code 105 1. Error code definition Overcurrent error due to short-circuited motor (Detail code 105) 2. Error definition and error detection method When a short is detected on the load side just before starting the inverter operation.
Page 199: Error Code [4260] (Tlmu)
[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-5-28 Error Code [4260] (TLMU) 1. Error code definition Heatsink overheat protection at startup 2. Error definition and error detection method The heatsink temperature (THHS) remains at or above TOH for 10 minutes or more at inverter startup. Refer to the relevant pages for the details of model names and the specified values.
Page 200: Error Code Definitions And Solutions: Codes [5000 - 5999]
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] Error Code Definitions and Solutions: Codes [5000 - 5999] 7-6-1 Error Codes [5101, 5102, 5103, 5104] 1. Error code definition 5101 Return air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit) 5102 Pipe temperature sensor (TH22) fault (Indoor unit)
Page 201: Error Codes [5102, 5103, 5104, 5105, 5106, 5107]
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-2 Error Codes [5102, 5103, 5104, 5105, 5106, 5107] 1. Error code definition 5102 HIC bypass circuit outlet temperature sensor (TH2) fault (Outdoor unit) 5103 Heat exchanger outlet temperature sensor (TH3) fault (Outdoor unit) 5104 Discharge temperature sensor (TH4) fault (Outdoor unit) 5105...
Page 202: Error Code [5110] (Tlmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-3 Error Code [5110] (TLMU) 1. Error code definition (P96, P120, P144 models only) Heatsink temperature sensor (THHS) fault (Detail code 01) 2. Error definition and error detection method When a short or an open of THHS is detected just before or during the inverter operation.
Page 203: Error Code [5201]
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-5 Error Code [5201] 1. Error code definition High-pressure sensor fault (63HS1) 2. Error definition and error detection method If the high pressure sensor detects 0.098MPa [14psi] or less during the operation, the outdoor unit stops once, turns to anti- restart mode for 3 minutes, and restarts after 3 minutes when the detected high pressure sensor is 0.098MPa [14psi] or more.
Page 204: Error Code [5301] Detail Code 115 (Tlmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-6 Error Code [5301] Detail Code 115 (TLMU) 1. Error code definition ACCT sensor fault (Detail code 115) 2. Error definition and error detection method When the formula "output current < 2 Arms" remains satisfied for 10 seconds while the inverter is in operation. 3.
Page 205: Error Code [5301] Detail Code 115 (Ylmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-7 Error Code [5301] Detail Code 115 (YLMU) 1. Error code definition ACCT sensor fault (Detail code 115) 2. Error definition and error detection method When the formula "output current < 1.5 Arms" remains satisfied for 10 seconds while the inverter is in operation. 3.
Page 206: Error Code [5301] Detail Code 116 (Tlmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-8 Error Code [5301] Detail Code 116 (TLMU) 1. Error code definition (P168 model only) DCCT sensor fault (Detail code116) 2. Error definition and error detection method When the bus current less than 18 Apeak is detected at startup (6Hz) 3.
Page 207: Error Code [5301] Detail Code 118 (Tlmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-10 Error Code [5301] Detail Code 118 (TLMU) 1. Error code definition (P168 model only) DCCT sensor circuit fault (Detail code118) 2. Error definition and error detection method When an error value is detected with the DCCT detection circuit just before the inverter starts 3.
Page 208: Error Code [5301] Detail Code 119 (Tlmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-11 Error Code [5301] Detail Code 119 (TLMU) 1. Error code definition Open-circuited IPM/Loose ACCT connector (Detail code 119) 2. Error definition and error detection method Presence of enough current cannot be detected during the self-diagnostic operation immediately before inverter startup. 3.
Page 209: Error Code [5301] Detail Code 119 (Ylmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-12 Error Code [5301] Detail Code 119 (YLMU) 1. Error code definition Open-circuited IPM/Loose ACCT connector (Detail code 119) 2. Error definition and error detection method Presence of enough current cannot be detected during the self-diagnostic operation immediately before inverter startup. 3.
Page 210: Error Code [5301] Detail Code 120 (Tlmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-13 Error Code [5301] Detail Code 120 (TLMU) 1. Error code definition Faulty ACCT wiring (Detail code 120) 2. Error definition and error detection method Presence of target current cannot be detected during the self-diagnostic operation immediately before startup. (Detection of improperly mounted ACCT sensor) 3.
Page 211: Error Code [5301] Detail Code 120 (Ylmu)
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-14 Error Code [5301] Detail Code 120 (YLMU) 1. Error code definition Faulty ACCT wiring (Detail code 120) 2. Error definition and error detection method Presence of target current cannot be detected during the self-diagnostic operation immediately before startup. 3.
Page 212: Error Codes [5305, 5306] Detail Code 133
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-16 Error Codes [5305, 5306] Detail Code 133 1. Error code definition Position detection error during operation (Detail code 133) 2. Error definition and error detection method An error from a motor sensor is detected during fan moter operation. 3.
Page 213: Error Codes [5305, 5306] Detail Code 134
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-17 Error Codes [5305, 5306] Detail Code 134 1. Error code definition RPM error before start up (Detail code 134) 2. Error definition and error detection method The fan RPM will not drop to the set RPM. 3.
Page 214: Error Code [5701]
[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-6-19 Error Code [5701] 1. Error code definition Loose float switch connector 2. Error definition and error detection method Detection of the disconnected float switch (open-phase condition) during operation 3.
Page 215: Error Code Definitions And Solutions: Codes [6000 - 6999]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] Error Code Definitions and Solutions: Codes [6000 - 6999] 7-7-1 Error Code [6201] 1. Error code definition Remote controller board fault (nonvolatile memory error) 2. Error definition and error detection method This error is detected when the data cannot be read out from the built-in nonvolatile memory on the remote controller.
Page 216: Error Code [6600]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-3 Error Code [6600] 1. Error code definition Address overlap 2. Error definition and error detection method An error in which signals from more than one indoor units with the same address are received The address and attribute that appear on the remote controller indicate the controller that detected the error.
Page 217: Error Code [6602]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-5 Error Code [6602] 1. Error code definition Transmission processor hardware error 2. Error definition and error detection method Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
Page 218: Error Code [6603]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-6 Error Code [6603] 1. Error code definition Transmission line bus busy error 2. Error definition and error detection method Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
Page 219: Error Code [6607] Error Source Address = Outdoor Unit (Oc)
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-8 Error Code [6607] Error Source Address = Outdoor Unit (OC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 220: Error Code [6607] Error Source Address = Indoor Unit (Ic)
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-9 Error Code [6607] Error Source Address = Indoor Unit (IC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 221: Error Code [6607] Error Source Address = Lossnay (Lc)
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-10 Error Code [6607] Error Source Address = LOSSNAY (LC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 222: Error Code [6607] Error Source Address = Me Remote Controller
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-11 Error Code [6607] Error Source Address = ME Remote Controller 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 223: Error Code [6607] Error Source Address = System Controller
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-12 Error Code [6607] Error Source Address = System Controller 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 224: Error Code [6607] All Error Source Addresses
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-13 Error Code [6607] All Error Source Addresses 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 225: Error Code [6607] No Error Source Address
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-14 Error Code [6607] No Error Source Address 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 226: Error Code [6608]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-15 Error Code [6608] 1. Error code definition No response error 2. Error definition and error detection method When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- When the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side.
Page 227: Error Code [6831]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-16 Error Code [6831] 1. Error code definition MA controller signal reception error (No signal reception) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes.
Page 228: Error Code [6832]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-17 Error Code [6832] 1. Error code definition MA remote controller signal transmission error (Synchronization error) 2. Error definition and error detection method MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals Indoor unit: 3 minutes Remote controller: 6 seconds...
Page 229: Error Code [6833]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-18 Error Code [6833] 1. Error code definition MA remote controller signal transmission error (Hardware error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. An error occurs when the transmitted data and the received data differ for 30 times in a row.
Page 230: Error Code [6834]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-19 Error Code [6834] 1. Error code definition MA controller signal reception error (Start bit detection error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 2 minutes.
Page 231: Error Code [6840]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-20 Error Code [6840] 1. Error code definition A control communication reception error 2. Error definition and error detection method Indoor/outdoor unit communication error (Signal receiving error) Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on Abnormal if indoor controller board could not receive any signal normally for 3 minutes.
Page 232: Error Code [6842]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-22 Error Code [6842] 1. Error code definition A control communication transmission/reception hardware trouble 2. Error definition and error detection method Indoor/outdoor unit communication error (Transmitting error) Abnormal if "1" receiving is detected 30 times continuously though indoor controller board has transmitted "0". 3.
Page 233: Error Code [6843]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-23 Error Code [6843] 1. Error code definition A control communication start bit detection error 2. Error definition and error detection method Indoor/outdoor unit communication error (Signal receiving error) Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on.
Page 234: Error Code [6846]
[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-7-24 Error Code [6846] 1. Error code definition Start-up time over 2. Error definition and error detection method Start-up time over The unit cannot finish start-up process within 4 minutes after power on. 3.
Page 235: Error Code Definitions And Solutions: Codes [7000 - 7999]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] Error Code Definitions and Solutions: Codes [7000 - 7999] 7-8-1 Error Code [7100] 1. Error code definition Total capacity error 2. Error definition and error detection method The model total of indoor units in the system with one outdoor unit exceeds limitations. 3.
Page 236: Error Code [7101]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-8-2 Error Code [7101] 1. Error code definition Capacity code setting error 2. Error definition and error detection method Connection of incompatible (wrong capacity code) indoor unit or outdoor unit 3.
Page 237: Error Code [7102]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-8-3 Error Code [7102] 1. Error code definition Wrong number of connected units 2. Error definition and error detection method The number of connected indoor units is "0" or exceeds the allowable value. 3.
Page 238: Error Code [7105]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-8-4 Error Code [7105] 1. Error code definition Address setting error 2. Error definition and error detection method Erroneous setting of OC unit address 3. Cause, check method and remedy Error source Cause Check method and remedy...
Page 239: Error Code [7110]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-8-6 Error Code [7110] 1. Error code definition Connection information signal transmission/reception error 2. Error definition and error detection method The given indoor unit is inoperable because it is not properly connected to the outdoor unit in the same system. 3.
Page 240: Error Code [7113]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-8-8 Error Code [7113] 1. Error code definition Function setting error (improper connection of CNTYP) 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15)
Page 241: Error Code [7117]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-8-9 Error Code [7117] 1. Error code definition Model setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15) Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for...
Page 242: Error Code [7130]
[7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-8-10 Error Code [7130] 1. Error code definition Incompatible unit combination 2. Error definition and error detection method The check code will appear when the indoor units for use with a different type of refrigerant or incompatible units are connect- 3.
Page 243 [7-8 Error Code Definitions and Solutions: Codes [7000 - 7999] ] HWE14080 - 234 -...
Page 244 Chapter 8 Troubleshooting Based on Observed Symptoms MA Remote Controller Problems..................... 237 8-1-1 The LCD Does Not Light Up....................... 237 8-1-2 The LCD Momentarily Lights Up and Then Goes Off................. 238 8-1-3 "HO" and "PLEASE WAIT" Do Not Go Off the Screen............... 239 8-1-4 Air Conditioning Units Do Not Operate When the ON Button Is Pressed.
Page 245 8-10-2 Checking the Inverter Board Error Detection Circuit................278 8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Problems ........278 8-10-4 Checking the Inverter for Damage at No-Load ................... 278 8-10-5 Checking the Inverter for Damage during Compressor Operation............279 8-10-6 Checking the Fan Motor for Ground Fault and Coil Resistance Problems .........
Page 246: Ma Remote Controller Problems
[8-1 MA Remote Controller Problems ] 8 Troubleshooting Based on Observed Symptoms MA Remote Controller Problems 8-1-1 The LCD Does Not Light Up. 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start run- ning.(Power indicator does not appear on the screen.) 2.
Page 247: The Lcd Momentarily Lights Up And Then Goes Off
[8-1 MA Remote Controller Problems ] 8-1-2 The LCD Momentarily Lights Up and Then Goes Off. 1. Phenomena When the remote controller operation SW is turned on, the operation status briefly appears on the display, then it goes off, and the display lights out immediately, and the unit stops. 2.
Page 248: Ho" And "Please Wait" Do Not Go Off The Screen
[8-1 MA Remote Controller Problems ] 8-1-3 "HO" and "PLEASE WAIT" Do Not Go Off the Screen. 1. Phenomena "HO" or "PLEASE WAIT" display on the remote controller does not disappear, and no operation is performed even if the button is pressed.
Page 249: Air Conditioning Units Do Not Operate When The On Button Is Pressed
[8-1 MA Remote Controller Problems ] 8-1-4 Air Conditioning Units Do Not Operate When the ON Button Is Pressed. 1. Phenomena Even if the operation button on the remote controller is pressed, the indoor and the outdoor units do not start running. 2.
Page 250: Me Remote Controller Problems
[8-2 ME remote Controller Problems ] ME remote Controller Problems 8-2-1 The LCD Does Not Light Up. 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running. (Power indicator does not appear on the screen.) 2.
Page 251: The Lcd Momentarily Lights Up And Then Goes Off
[8-2 ME remote Controller Problems ] 8-2-2 The LCD Momentarily Lights Up and Then Goes Off. 1. Phenomena When the remote controller operation SW is turned on, a temporary operation display is indicated, and the display lights out immediately. 2. Cause 1) The power is not supplied to the indoor unit.
Page 252: Ho" Does Not Go Off The Screen
[8-2 ME remote Controller Problems ] 8-2-3 "HO" Does Not Go Off the Screen. 1. Phenomena "HO" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. 2. Cause Without using MELANS 1) Outdoor unit address is set to "00"...
Page 253: 88" Appears On The Lcd
[8-2 ME remote Controller Problems ] 8-2-4 "88" Appears on the LCD. 1. Phenomena "88" appears on the remote controller when the address is registered or confirmed. 2. Cause, check method and remedy Cause Check method and remedy An error occurs when the address is registered or con- firmed.
Page 254: Refrigerant Control Problems
[8-3 Refrigerant Control Problems ] Refrigerant Control Problems 8-3-1 Units in the Cooling Mode Do Not Operate at Expected Capacity. 1. Phenomena Although cooling operation starts with the normal remote controller display, the capacity is not enough 2. Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
Page 255 [8-3 Refrigerant Control Problems ] Cause Check method and remedy RPM error of the outdoor unit FAN Refer to the following page(s). [8-7 Troubleshooting Outdoor Unit Fan Prob- Motor failure or board failure, or airflow rate de- lems](page 257) crease due to clogging of the heat exchanger [7-6-2 Error Codes [5102, 5103, 5104, 5105, 5106, The fan is not properly controlled as the outdoor 5107]](page 192)
Page 256: Units In The Heating Mode Do Not Operate At Expected Capacity
[8-3 Refrigerant Control Problems ] 8-3-2 Units in the Heating Mode Do Not Operate at Expected Capacity. 1. Phenomena Although heating operation starts with the normal remote controller display, the capacity is not enough. 2. Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
Page 257 [8-3 Refrigerant Control Problems ] Cause Check method and remedy Indoor unit LEV malfunction Refer to the following page(s).[8-8 Troubleshooting Insufficient refrigerant flows due to LEV malfunction LEV Problems](page 258) (not enough opening). Temperature reading error on the indoor unit piping Check the thermistor.
Page 258: Outdoor Units Stop At Irregular Times
[8-3 Refrigerant Control Problems ] 8-3-3 Outdoor Units Stop at Irregular Times. 1. Phenomena Outdoor unit stops at times during operation. 2. Cause, check method and remedy Cause Check method and remedy The first stop is not considered as an error, as the Check the mode operated in the past by displaying unit turns to anti-restart mode for 3 minutes as a pre- preliminary error history on LED display with SW4.
Page 259: Checking Transmission Waveform And For Electrical Noise Interference
[8-4 Checking Transmission Waveform and for Electrical Noise Interference ] Checking Transmission Waveform and for Electrical Noise Interference 8-4-1 M-NET Control is performed by exchanging signals between the outdoor unit and the indoor unit (ME remote controller) through M- NET transmission. Noise interference on the transmission line will interrupt the normal transmission, leading to erroneous op- eration.
Page 260 [8-4 Checking Transmission Waveform and for Electrical Noise Interference ] (3) Check method and remedy 1) Measures against noise Check the followings when noise exists on the wave or the errors described in (1) occur. Error code definition Remedy Check that the wiring 1.
Page 261: Ma Remote Controller
[8-4 Checking Transmission Waveform and for Electrical Noise Interference ] 8-4-2 MA Remote Controller The communication between the MA remote controller and the indoor unit is performed with current tone burst. (1) Symptoms caused by noise interference on the transmission line If noise is generated on the transmission line, and the communication between the MA remote controller and the indoor unit is interrupted for 3 minutes in a row, MA transmission error (6831) will occur.
Page 262: Pressure Sensor Circuit Configuration And Troubleshooting Pressure Sensor Problems
[8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems 8-5-1 Comparing the High-Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the high-pressure sensor appears on the LED1 on the control board.
Page 263: Comparing The Low-Pressure Sensor Measurement And Gauge Pressure
[8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] 8-5-3 Comparing the Low-Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the low-pressure sensor appears on the LED1 on the control board.
Page 264: Troubleshooting Solenoid Valve Problems
[8-6 Troubleshooting Solenoid Valve Problems ] Troubleshooting Solenoid Valve Problems Check whether the output signal from the control board and the operation of the solenoid valve match. Setting the self-diagnosis switch (SW4) as shown in the figure below causes the ON signal of each relay to be output to the LED's. Each LED shows whether the relays for the following parts are ON or OFF.
Page 265 [8-6 Troubleshooting Solenoid Valve Problems ] (3) In case of SV1a (Bypass valve) This solenoid valve opens when powered (Relay ON). 1) At compressor start-up, the SV1a turns on for 4 minutes, and the operation can be checked by the self-diagnosis LED display and the closing sound.
Page 266: Troubleshooting Outdoor Unit Fan Problems
[8-7 Troubleshooting Outdoor Unit Fan Problems ] Troubleshooting Outdoor Unit Fan Problems (1) Fan motor (common items) To check the revolution of the fan, check the inverter output state on the self-diagnosis LED, as the inverter on the outdoor fan controls the revolutions of the fan. When starting the fan, the fan runs at full speed for 5 seconds.
Page 267: Troubleshooting Lev Problems
[8-8 Troubleshooting LEV Problems ] Troubleshooting LEV Problems 8-8-1 General Overview on LEV Operation LEV (indoor unit: linear expansion valve) and LEV2 (LEV2a, LEV2b) (outdoor unit: linear expansion valve) are stepping-motor- driven valves that operate by receiving pulse signals from the indoor and outdoor unit control boards. (1) Indoor LEV and Outdoor LEV (LEV2a, LEV2b) The valve opening changes according to the number of pulses.
Page 268 [8-8 Troubleshooting LEV Problems ] 3) Pulse signal output and valve operation Output pulses change in the following orders when the Output Output state Valve is closed; 1 (phase) number Valve is open; *1. When the LEV opening angle does not change, all the output phases will be off.
Page 269 [8-8 Troubleshooting LEV Problems ] (2) Outdoor LEV (LEV1) The valve opening changes according to the number of pulses. 1) Connections between the outdoor control board and LEV1 (outdoor expansion valve) Outdoor control board DC 12V Brown Drive circuit Blue Orange Yellow White...
Page 270: Possible Problems And Solutions
[8-8 Troubleshooting LEV Problems ] 8-8-2 Possible Problems and Solutions The specifications of the outdoor unit (outdoor LEV) and the indoor unit (indoor LEV) differ.Therefore, remedies for each failure may vary. Check the remedy specified for the appropriate LEV as indicated in the right column. Malfunction Judgment method Remedy...
Page 271: Coil Removal Instructions
[8-8 Troubleshooting LEV Problems ] 8-8-3 Coil Removal Instructions (1) Outdoor unit LEV (LEV1) coil removal procedure 1) LEV component As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Body Coils Stopper...
Page 272 [8-8 Troubleshooting LEV Problems ] (2) Removal procedure of outdoor unit LEV (LEV2a, LEV2b) coil 1) Components The outdoor unit LEV consists of a coil and a valve body that can be separated from each other. Body Stopper Coil Lead wire 2) Removing the coil Securely hold the LEV at the bottom (as indicated by A in the figure), and turn the coil.
Page 273: Troubleshooting Inverter Problems (Tlmu)
[8-9 Troubleshooting Inverter Problems (TLMU) ] Troubleshooting Inverter Problems (TLMU) 8-9-1 Inverter-Related Problems and Solutions Replace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.
Page 274 [8-9 Troubleshooting Inverter Problems (TLMU) ] Error display/failure condition Measure/inspection item Inverter related errors Implement solutions that correspond to the error codes or preliminary error codes.[7- 4250, 4255, 4256, 4220, 4225, 4226, 4230, 4240, 4260, 1 Error Code and Preliminary Error Code Lists](page 151) 5301, 5305, 5306, 0403 Main power breaker trip <1>...
Page 275: Checking The Inverter Board Error Detection Circuit
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-2 Checking the Inverter Board Error Detection Circuit Items to be checked Phenomena Remedy <P72, P96, P120, P144 models> 1) IPM/overcurrent breaker trip Replace the INV board. Error code: 4250 Remove power supply. Detail code: No. 101, 104, 105, 106, and 107 Disconnect the inverter out- 2) Logic error...
Page 276: Checking The Inverter For Damage At No-Load
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-4 Checking the Inverter for Damage at No-Load Items to be checked Phenomena Remedy <P72, P96, P120, P144 models> Inverter-related problems Turn off SW1-1 and go to section 8-9-2. are detected. Remove power supply. Inverter voltage is not out- Replace the INV board.
Page 277: Checking The Inverter For Damage During Compressor Operation
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-5 Checking the Inverter for Damage during Compressor Operation Items to be checked Phenomena Remedy Put the outdoor unit into operation. Overcurrent-related prob- Check items 8-9-2 through 8-9-4 for prob- Check the inverter output voltage lems occur immediately af- lems.
Page 278: Checking The Fan Inverter For Damage At No Load
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-8 Checking the Fan Inverter for Damage at No Load Check list Phenomenon Resolution Turn off breaker. Within 30 seconds from the start of Change fan board. *Turn power off without fail. operation, an error other than a posi- tion error (5305, 5306) (detail code 132) is detected.
Page 279: Checking The Fan Inverter For Damage With Load
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-9 Checking the Fan Inverter for Damage with Load Check list Phenomenon Resolution Turn off breaker. After operation, electrical overload error Check for fan motor lock. or position detection error and unit stops If locked, change for fan motor. within 10 seconds.
Page 280: Solutions For The Main No-Fuse Breaker Trip
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-11 Solutions for the Main No-Fuse Breaker Trip Items to be checked Phenomena Remedy Perform Meg check be- Zero to several ohm, or Meg failure a. Check each part in the main inverter circuit. tween the terminals on the Refer to the following page(s).
Page 281: Simple Check On Inverter Circuit Components
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-13 Simple Check on Inverter Circuit Components Turn off the power of the unit and leave it turned off for 10 minutes. Check that the voltage of the electrolytic capacitor (inverter main circuit) is 20 VDC or below. Then, remove the relevant parts from the control box. Before checking, turn the power off and remove the parts to be checked from the control box.
Page 282: Troubleshooting Problems With Intelligent Power Module
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-14 Troubleshooting Problems with Intelligent Power Module (P168 model) Measure resistances between each pair of terminals on the IPM with a tester, and use the results for troubleshooting. 1) Notes on measurement Check the polarity before measuring. (On the tester, black normally indicates plus.) Check that the resistance is not open ( ) or not shorted (to 0 ).
Page 283: Troubleshooting Problems With Diode Stack
[8-9 Troubleshooting Inverter Problems (TLMU) ] 8-9-15 Troubleshooting Problems with Diode Stack (P168 model) Measure resistances between each pair of terminals on the diode stack with a tester, and use the results for troubleshooting. For cautionary notes on measuring diode stack resistance and information on the types of testers to be used, refer to the fol- lowing page(s).
Page 284 [8-9 Troubleshooting Inverter Problems (TLMU) ] Judgment value (reference) Black ( + ) SC-P1 TB-N SC-R SC-S SC-T SC-P1 5 - 200 5 - 200 5 - 200 TB-N Red (-) SC-R 5 - 200 SC-S 5 - 200 SC-T 5 - 200 Black ( + ) SC-P2...
Page 285: Troubleshooting Inverter Problems (Ylmu)
[8-10 Troubleshooting Inverter Problems (YLMU) ] 8-10 Troubleshooting Inverter Problems (YLMU) 8-10-1 Inverter-Related Problems and Solutions Replace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.
Page 286 [8-10 Troubleshooting Inverter Problems (YLMU) ] Error display/failure condition Measure/inspection item Inverter related errors Implement solutions that correspond to the error codes or preliminary error 4250, 4255, 4256, 4220, 4225, 4226, 4230, 4240, 4260, codes.[7-1 Error Code and Preliminary Error Code Lists](page 151) 5301, 5305, 5306, 0403 Main power breaker trip Refer to the following page(s).
Page 287: Checking The Inverter Board Error Detection Circuit
[8-10 Troubleshooting Inverter Problems (YLMU) ] 8-10-2 Checking the Inverter Board Error Detection Circuit Items to be checked Phenomena Remedy Remove power supply. Overcurrent error Replace the INV board. Error code: 4250 Detail code: No. 101, 104, 105, 106, and Disconnect the inverter Logic error Replace the INV board.
Page 288: Checking The Inverter For Damage During Compressor Operation
[8-10 Troubleshooting Inverter Problems (YLMU) ] 8-10-5 Checking the Inverter for Damage during Compressor Operation Items to be checked Phenomena Remedy Put the outdoor unit into operation. Overcurrent-related problems occur im- Check items 8-10-2 through 8- Check the inverter output voltage af- mediately after compressor startup.
Page 289: Checking The Fan Inverter For Damage At No Load
[8-10 Troubleshooting Inverter Problems (YLMU) ] 8-10-8 Checking the Fan Inverter for Damage at No Load Items to be checked Phenomena Remedy Turn off breaker. Within 30 seconds from the start of Change fan board. *Turn power off without fail. operation, an error other than a posi- tion error (5305, 5306) (detail code 132) is detected.
Page 290: Checking The Fan Inverter For Damage With Load
[8-10 Troubleshooting Inverter Problems (YLMU) ] 8-10-9 Checking the Fan Inverter for Damage with Load Items to be checked Phenomena Remedy Turn off breaker. After operation, electrical overload error Check for fan motor lock. or position detection error and unit stops If locked, change for fan motor.
Page 291: Solutions For The Main No-Fuse Breaker Trip
[8-10 Troubleshooting Inverter Problems (YLMU) ] 8-10-11 Solutions for the Main No-Fuse Breaker Trip Items to be checked Phenomena Remedy Check the breaker capacity. Use of a non-specified break- Replace it with a specified breaker. Perform Meg check between the Zero to several ohm, or Meg Check each part and wiring.
Page 292: Simple Check On Inverter Circuit Components
[8-10 Troubleshooting Inverter Problems (YLMU) ] 8-10-13 Simple Check on Inverter Circuit Components Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less. Part name Judgment method IGBT module...
Page 293 [8-10 Troubleshooting Inverter Problems (YLMU) ] Judgment value (reference) Black ( + ) SC-P1 FT-N SC-L1 SC-L2 SC-L3 SC-P1 5 - 200 5 - 200 5 - 200 FT-N Red (-) SC-L1 5 - 200 SC-L2 5 - 200 SC-L3 5 - 200 Black ( + ) SC-P2...
Page 294: Control Circuit (Tlmu)
[8-11 Control Circuit (TLMU) ] 8-11 Control Circuit (TLMU) 8-11-1 Control Power Supply Function Block 1) PUHY-P72, P96TLMU Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter INV board Compressor Noise filter Rectifier Smoothing capacitor Inverter...
Page 295 [8-11 Control Circuit (TLMU) ] 2) PUHY-P120, P144TLMU Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter INV board Compressor Rectifier Smoothing capacitor Inverter Noise filter AC 208 / 230 V Terminal block for Inverter drive Fuse 17V Power supply...
Page 296 [8-11 Control Circuit (TLMU) ] 3) PUHY-P168TLMU Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter Compressor Inverter Smoothing capacitor Noise filter Rectifier AC 208 / 230 V INV board Inverter drive Fuse Terminal block for 15V Power supply...
Page 297: Troubleshooting Problems With Outdoor Unit Transmission Power Supply Circuit
[8-11 Control Circuit (TLMU) ] 8-11-2 Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit 1) PUHY-P72, P96, P120, P144TLMU Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. DC 24 ~ 30 V Check whether the transmission line is disconnected, check for contact failure, and repair the problem.
Page 298 [8-11 Control Circuit (TLMU) ] 2) PUHYP168TLMU Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
Page 299: Control Circuit (Ylmu)
[8-12 Control Circuit (YLMU) ] 8-12 Control Circuit (YLMU) 8-12-1 Control Power Supply Function Block 1) PUHY-P72, P96YLMU Power source system (AC 230 / 460 V) Control system (DC 5 ~ 30 V) INV board Noise filter Compressor Rectifier Smoothing capacitor Inverter Noise filter AC 460V...
Page 300 [8-12 Control Circuit (YLMU) ] 2) PUHY-P120, P144, P168YLMU Power source system (AC 230 / 460 V) Control system (DC 5 ~ 30 V) INV board Noise filter Compressor Smoothing capacitor Inverter Noise filter Rectifier AC 460V Fuse Terminal block for Inverter drive 17V Power supply power source...
Page 301: Troubleshooting Problems With Outdoor Unit Transmission Power Supply Circuit
[8-12 Control Circuit (YLMU) ] 8-12-2 Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit 1) PUHY-P72, P96, P120, P144, P168YLMU Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem.
Page 302: 8-13 Measures For Refrigerant Leakage
[8-13 Measures for Refrigerant Leakage ] 8-13 Measures for Refrigerant Leakage 1. Leak spot: In the case of extension pipe for indoor unit (Cooling season) 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side. 2) Stop all the indoor units, and close the liquid service valve (BV2) inside the outdoor unit while the compressor is being stopped.
Page 303 [8-13 Measures for Refrigerant Leakage ] When the power to the outdoor/indoor unit must be turned off to repair the leak after closing the service valves specified in the item 4, turn the power off in approximately one hour after the outdoor/indoor units stop. 1) When 30 minutes have passed after the item 4 above, the indoor unit lev turns from fully closed to slightly open to prevent the refrigerant seal.
Page 304: 8-14 Compressor Replacement Instructions
[8-14 Compressor Replacement Instructions ] 8-14 Compressor Replacement Instructions Follow the procedures below (Steps 1 through 6) to remove the compressor components and replace the compressor. Reassemble them in the reverse order after replacing the compressor. 1. Remove both the top and bottom service panels 2.
Page 305 [8-14 Compressor Replacement Instructions ] Compressor cover Compressor cover (right) (top) 4. Remove the compressor cover (top). 5. Remove the compressor wires, compressor cover, and the right. Protection for the sealing material Suction piping Protection for the compressor cover 6. Place protective materials on the insulation lining of 7.
Page 306: 8-15 Heat Exchanger Replacement Instructions
[8-15 Heat exchanger Replacement Instructions ] 8-15 Heat exchanger Replacement Instructions The heat exchanger of this model uses aluminum pipes. When replacing the heat exchanger, be sure to remove it at the copper pipe brazed part (A). Do not perform the replacement work at the joint part (C) of the copper pipe and aluminum pipe or at the aluminum pipe part (B).
Page 307: Troubleshooting Problems Using The Led Status Indicators On The Outdoor Unit
[8-16 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ] 8-16 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit If the LED error display appear as follows while all the SW4 switches and SW6-10 are set to OFF, check the items under the ap- plicable item numbers below.
Page 308: Chapter 9 Led Status Indicators On The Outdoor Unit Circuit Board
Chapter 9 LED Status Indicators on the Outdoor Unit Circuit Board LED Status Indicators........................301 9-1-1 How to Read the LED ......................... 301 9-1-2 Initial LED Display..........................302 9-1-3 Clock Memory Function ........................303 LED Status Indicators Table ......................304 HWE14080 - 299 -...
Page 309 HWE14080 - 300 -...
Page 310: Led Status Indicators
[9-1 LED Status Indicators ] 9 LED Status Indicators on the Outdoor Unit Circuit Board LED Status Indicators 9-1-1 How to Read the LED By setting the DIP SW 4-1 through 4-10 (Set SW6-10 to OFF.)(Switch number 10 is represented by 0), the operating condition of the unit can be monitored on the service monitor.
Page 311: Initial Led Display
Remarks Software version [0103] : Version 1.03 Refrigerant type [ 410] : R410A Model and capacity [H-20] : Cooling/Heating 20 HP For the first few minutes after power on, the capacity of each outdoor unit is displayed. Thereafter, the com- bined capacity is displayed.
Page 312: Clock Memory Function
[9-1 LED Status Indicators ] 9-1-3 Clock Memory Function The outdoor unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiv- ing the time set by the system controller, such as AG-150A. If an error (including a preliminary error) occurs, the error history data and the error detection time are stored into the service memory.
Page 313: Led Status Indicators Table
[9-2 LED Status Indicators Table] HWE14080 - 304 -...
Page 314 [9-2 LED Status Indicators Table] HWE14080 - 305 -...
Page 315 [9-2 LED Status Indicators Table] HWE14080 - 306 -...
Page 316 [9-2 LED Status Indicators Table] HWE14080 - 307 -...
Page 317 [9-2 LED Status Indicators Table] HWE14080 - 308 -...
Page 318 [9-2 LED Status Indicators Table] HWE14080 - 309 -...
Page 319 [9-2 LED Status Indicators Table] HWE14080 - 310 -...
Page 320 [9-2 LED Status Indicators Table] HWE14080 - 311 -...
Page 321 [9-2 LED Status Indicators Table] HWE14080 - 312 -...
Page 322 [9-2 LED Status Indicators Table] HWE14080 - 313 -...
Page 323 [9-2 LED Status Indicators Table] HWE14080 - 314 -...
Page 324 [9-2 LED Status Indicators Table] HWE14080 - 315 -...
Page 325 [9-2 LED Status Indicators Table] HWE14080 - 316 -...
Page 326 [9-2 LED Status Indicators Table] HWE14080 - 317 -...
Page 327 [9-2 LED Status Indicators Table] HWE14080 - 318 -...
Page 328 [9-2 LED Status Indicators Table] HWE14080 - 319 -...
Page 329 [9-2 LED Status Indicators Table] HWE14080 - 320 -...
Page 330 [9-2 LED Status Indicators Table] HWE14080 - 321 -...
Page 331 [9-2 LED Status Indicators Table] HWE14080 - 322 -...
Page 332 [9-2 LED Status Indicators Table] HWE14080 - 323 -...
Page 333 [9-2 LED Status Indicators Table] HWE14080 - 324 -...
Page 334 [9-2 LED Status Indicators Table] HWE14080 - 325 -...
Page 335 [9-2 LED Status Indicators Table] HWE14080 - 326 -...
Page 336 [9-2 LED Status Indicators Table] HWE14080 - 327 -...
Page 337 [9-2 LED Status Indicators Table] HWE14080 - 328 -...
Page 338 [9-2 LED Status Indicators Table] HWE14080 - 329 -...
Page 339 [9-2 LED Status Indicators Table] HWE14080 - 330 -...
Page 340 [9-2 LED Status Indicators Table] HWE14080 - 331 -...
Page 341 [9-2 LED Status Indicators Table] HWE14080 - 332 -...
Page 342 [9-2 LED Status Indicators Table] HWE14080 - 333 -...
Page 343 [9-2 LED Status Indicators Table] HWE14080 - 334 -...
Page 344 [9-2 LED Status Indicators Table] HWE14080 - 335 -...
Page 345 [9-2 LED Status Indicators Table] HWE14080 - 336 -...

This manual is also suitable for:

Puhy-p72 P96 P120 P144 P168t(y)lmu-a Puhy-p144 ... Show all

Mitsubishi Electric R410A Service Handbook

Chapter 2 Restrictions

Chapter 3 Major Components, Their Functions and Refrigerant Circuits

Chapter 4 Electrical Components and Wiring Diagrams

Chapter 5 Control

Chapter 6 Test Run

Chapter 7 Troubleshooting Using Error Codes

Chapter 9 LED Status Indicators on the Outdoor Unit Circuit Board

Quick Links

Troubleshooting

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Summary of Contents for Mitsubishi Electric R410A