Mitsubishi Electric PUMY-P200YKM Technical & Service Manual

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Page 1 October 2014 No. OCH575 TECHNICAL & SERVICE MANUAL <Outdoor unit> Note: [Service Ref.] [Model Name] • This service manual PUMY-P200YKM describes technical data of PUMY-P200YKM the outdoor units only. Salt proof model PUMY-P200YKM-BS PUMY-P200YKM-BS CONTENTS 1. SAFETY PRECAUTION ........2 2.
Page 2: Safety Precaution
SAFETY PRECAUTION 1-1. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. Avoid using thin pipes. Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc.
Page 3 [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.
Page 4 Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
Page 5: Overview Of Units
OVERVIEW OF UNITS 2-1. UNIT CONSTRUCTION PUMY-P200YKM Outdoor unit PUMY-P200YKM-BS Capacity Type 15 to Type 250 Applicable indoor unit Number of units 1 to 12 unit 50 to 130% of outdoor unit capacity * Total system wide capacity CMY-Y62-G-E CMY-Y64-G-E...
Page 6: Unit Specifications
2-2. UNIT SPECIFICATIONS (1) Outdoor Unit PUMY-P200YKM Service Ref. PUMY-P200YKM-BS Cooling (kW) 22.4 Capacity Heating (kW) 25.0 Compressor (kW) Cooling/Heating capacity indicates the maximum value at operation under the following condition. *Cooling Indoor : D.B. 27°C/ W.B. 19.0°C Outdoor : D.B. 35°C...
Page 7: Specifications
SPECIFICATIONS PUMY-P200YKM Service Ref. PUMY-P200YKM-BS Power source 380/400/415 V, 50 Hz Cooling capacity 22.4 (Nominal) kcal/h 19,300 BTU/h 76,400 Power input 6.05 Current input 9.88, 9.39, 9.05 kW/kW 3.70 Temp. range of Indoor temp. W.B. 15 to 24°C cooling Outdoor temp.
Page 8: Data.
, the total capacity of the indoor unit will be: 2.8 + 5.6 o 4 = 25.2 The following figures are obtained from the 25.2 total capacity of indoor units, referring the standard capacity diagram in "4-3-1. PUMY-P200YKM PUMY-P200YKM-BS <cooling>" and "4-3-2. PUMY-P200YKM PUMY-P200YKM-BS <heating>" : Capacity (kW)
Page 9 4-2. STANDARD OPERATION DATA (REFERENCE DATA) PUMY-P200YKM Operation PUMY-P200YKM-BS Indoor 27°C/ 19°C Ambient 20°C/ — DB/WB temperature Outdoor 35°C 7°C/ 6°C No. of connected units Unit Indoor unit No. of units in operation Model — 25 × 7/ 50 × 1...
Page 10 4-3. STANDARD CAPACITY DIAGRAM Before calculating the sum of total capacity of indoor units, please convert the value into the kW model capacity following the formula on "4-1-1. Method for obtaining system cooling and heating capacity". 4-3-1. PUMY-P200YKM PUMY-P200YKM-BS <Cooling> 25.0 20.0...
Page 11 4-3-2. PUMY-P200YKM PUMY-P200YKM-BS <Heating> 30.0 25.0 20.0 15.0 10.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 Total capacity of indoor units(kW) 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 Total capacity of indoor units(kW) 12.0...
Page 12: Correcting Cooling And Heating Capacity
Individual capacity under stated conditions = total capacity under the stated conditions o total capacity at the rated time (3) Capacity correction factor curve PUMY-P200YKM PUMY-P200YKM-BS Figure 1 Figure 2 Cooling performance curve...
Page 13 4-4-2. Correcting Capacity for Changes in the Length of Refrigerant Piping (1) During cooling, obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total in-use indoor capacity, and find the capacity ratio corresponding to the standard piping length from Figure 3. Then multiply by the cooling capacity from Figure 1 to obtain the actual capacity.
Page 14: Table Of Contents
4-5. NOISE CRITERION CURVES SPL(dB) MODE LINE PUMY-P200YKM COOLING PUMY-P200YKM-BS HEATING COOLING SILENT MODE NC-70 MICROPHONE NC-60 UNIT NC-50 1.5m NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 GROUND CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz OCH575...
Page 15: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit : mm PUMY-P200YKM PUMY-P200YKM-BS OCH575...
Page 16: Wiring Diagram
WIRING DIAGRAM PUMY-P200YKM PUMY-P200YKM-BS LEV-A LEV-B TH7 TH6 TH3 TH4 63LS 63HS SYMBOL NAME Terminal Block <Power Supply> MULTI. B. is the switch position. t° t° t° t° t° Terminal Block <Indoor/Outdoor Transmission Line> CN3D CN3S CN3N SWU2 SWU1 (WHT)
Page 17: Necessary Conditions For System Construction
NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 7-1. TRANSMISSION SYSTEM SETUP OCH575...
Page 18: Refrigerant System Diagram
7-2. REFRIGERANT SYSTEM DIAGRAM PUMY-P200YKM PUMY-P200YKM-BS Unit: mm Thermistor(TH7) Check valve <Ambient> <High pressure> Service port 4-way valve Strainer Refrigerant gas pipe Distributor High pressure Ball valve switch(63H) Check valve Solenoid Oil separator <Low pressure> Valve(SV1) Capillary Strainer tube Thermistor(TH6) Strainer <Suction pipe>...
Page 19: System Control
7-3. SYSTEM CONTROL 7-3-1. Example for the System • Example for wiring control cables, wiring method and address setting, permissible lengths, and the prohibited items are listed in the standard system with detailed explanation. A. Example of a M-NET remote controller system (address setting is necessary.) Example of wiring control cables Wiring Method and Address Setting 1. Standard operation a.
Page 20 • Name, Symbol and the Maximum Remote controller Units for Connection Name Symbol Maximum units for connection Outdoor unit — Indoor unit 1 OC unit can be connected to 1 to 12(P175)/1 to 12 (P200)/1 to 12 (P225) IC units M-NET remote Maximum 2 RC for 1 indoor unit, Maximum 12 RC for 1 OC controller...
Page 21 B. Example of a group operation system with 2 or more outdoor units and a M-NET remote controller. (Address settings are necessary.) (51) (01) (02) (05) (06) M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S (105) (155)
Page 22 • Name, Symbol, and the Maximum Units for Connection • Longest length via outdoor units : L [ 500 meters (1.25mm²) • Longest transmission cable length : L [ 200 meters (1.25mm²) • Remote controller cable length : R [ 10 meters (0.5 to 1.25mm²) If the length exceeds 10 meters, use a 1.25 mm² shielded wire. The length of this sec- tion (L ) should be included in the calculation of the maximum length and overall length.
Page 23 C. Example of a MA remote controller system (address setting is not necessary.) NOTE : In the case of same group operation, need to set the address that is only main indoor unit. Example of wiring control cables Wiring Method and Address Setting 1.
Page 24 Permissible Lengths Prohibited items The MA remote controller and the Longest transmission cable length: M-NET remote controller cannot be [ 200 m (1.25 mm²) used together with the indoor unit MA remote controller cable length: of the same group. [ 200 m (0.3 to 1.25 mm²) TB15 TB15 M1 M2 S...
Page 25 D. Example of a group operation with 2 or more outdoor units and a MA remote controller. (Address settings are necessary.) (51) (01) (02) (05) (06) TB15 TB15 TB15 TB15 M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S (53)
Page 26 • Name, Symbol, and the Maximum Units for Connection Longest length via outdoor unit (M-NET cable): L and L [ 500 m (1.25 E more) Longest transmission cable length (M-NET cable): L and L and L and L and L [ 200 m (1.25 E or more) Remote controller cable length: m1 and m1+m2+m3 and m1+m2+m3+m4 [ 200 m (0.3 to 1.25 E) (51)
Page 27: Troubleshooting
TROUBLESHOOTING 8-1. CHECK POINTS FOR TEST RUN 8-1-1. Procedures before test run (1) Before a test run, make sure that the following work is completed. • Installation related : Make sure that the panel of cassette type and electrical wiring are done. Otherwise electrical functions like auto vane will not operate normally. • Piping related : Perform leakage test of refrigerant and drain piping.
Page 28 8-1-1-2. Test run for wired remote controller <PAR-31MAA> MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Test run" with the F1 or F2 button, and press the button.
Page 29 8-1-2. Special Function Operation and Settings (for M-NET Remote Controller) • It is necessary to perform “group settings” and “paired settings” at making group settings of different refrigerant systems (multiple outdoor unit). (A) Group settings: Enter the indoor unit controlled by the remote controller, check the content of entries, and clear entries, etc.
Page 30 (2) Address check: Refer to section (1) regarding address entry. a) In making group settings: • Turn off the remote controller: Press the remote controller's ON/OFF button to stop operation (the indicator light will go off). • Locate the indoor unit address display mode: Press the FILTER and k buttons on the remote controller simultaneously and hold for 2 seconds. • Display indoor unit address: The entered indoor units address and type will be displayed each time the button is pressed. Note that when 1 entry is made, only 1 address will be displayed no matter how many times the w button is pressed. • Returning to the normal mode after completing check: Simultaneously press the FILTER and k buttons on the remote controller and hold for 2 seconds to return to the normal mode.
Page 31: Table Of Contents
8-1-3. Countermeasures for Error During Test Run • If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Determine the nature of the abnormality and apply corrective measures. Detected Unit Check Remarks Trouble Remote code Indoor Outdoor Controller Outdoor multi controller circuit board – 0403 Serial communication error Power circuit board communication trouble...
Page 32: Serial Communication Error
Check code Serial communication error 0403 Abnormal points and detection methods Causes and check points Abnormal if serial communication between the outdoor multi controller Wire breakage or contact failure of connector CN2 or circuit board and outdoor power circuit board is defective. Malfunction of communication circuit to power circuit board on outdoor multi controller circuit board Malfunction of communication circuit on outdoor...
Page 33 Check code Compressor temperature trouble 1102 Chart 1 of 2 Abnormal points and detection methods Causes and check points (1) Abnormal if TH4 falls into following temperature conditions; Malfunction of stop valve Over-heated compressor operation caused by ●exceeds 110 [230°F] continuously for 5 minutes shortage of refrigerant ●exceeds 125 [257°F] Defective thermistor Defective outdoor multi controller circuit board...
Page 34 Check code Compressor temperature trouble 1102 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Disconnect the thermistor wiring to check the resistance. Is there a resistance detected? Replace the thermistor.
Page 35 Check code High pressure trouble 1302 Chart 1 of 4 Abnormal points and detection methods Causes and check points <63H equipped model (63HS non-equipped)> Defective operation of stop valve (not fully open) (1) High pressure abnormality (63H operation) Clogged or broken pipe Abnormal if 63H operates(*) during compressor operation.
Page 36 Check code High pressure trouble 1302 Chart 2 of 4 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is the indoor unit filter clogged? Clean the filter. (Clogged filter) (No clog) Is there dirt on the indoor heat Wash the indoor heat exchanger.
Page 37 Check code High pressure trouble 1302 Chart 3 of 4 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the TH7. Disconnect the indoor LEV wiring to check the resistance.
Page 38 Check code High pressure trouble 1302 Chart 4 of 4 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the SV1. <63H equipped model (63HS non-equipped)>...
Page 39 Check code Superheat due to low discharge temperature trouble 1500 Chart 1 of 2 Abnormal points and detection methods Causes and check points Abnormal if the discharge superheat is continuously detected less than Disconnection or loose connection of TH4 or equal to −15 [5°F]* for 5 minutes even though the indoor LEV has Defective holder of TH4 minimum open pulse after the compressor starts operating for 10 minutes.
Page 40 Check code Superheat due to low discharge temperature trouble 1500 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the indoor LEV.
Page 41 Check code Refrigerant shortage trouble 1501 Chart 1 of 2 Abnormal points and detection methods Causes and check points (1) Abnormal when all of the following conditions are satisfied: Defective operation of stop valve (not fully open) 1. The compressor is operating in HEAT mode Defective thermistor 2.Discharge super heat is 80 [176-F] or more. Defective outdoor multi controller circuit board 3.Difference between TH7 and the TH3 applies to the formula of Indoor LEV performance failure...
Page 42 Check code Refrigerant shortage trouble 1501 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the thermistor. Check the 63HS voltage.
Page 43: Blocked Valve In Cooling Mode
Check code Blocked valve in cooling mode 1501 Abnormal points and detection methods Causes and check points Abnormal if stop valve is blocked during cooling operation. Outdoor liquid/gas valve is blocked. Mulfunction of outdoor LEV (LEV1)(blockage) Abnormal when both of the following temperature conditions are satisfied for 20 minutes or more during cooling operation. 1. TH22j−TH21j ] −2°C [28.4-F] 2. TH23j−TH21j ] −2°C [28.4-F] TH21: Indoor intake temperature thermistor...
Page 44: Way Valve Trouble In Heating Mode
Check code 4-way valve trouble in heating mode 1508 Abnormal points and detection methods Causes and check points Abnormal if 4-way valve does not operate during heating operation. 4-way valve failure Disconnection or failure of 4-way valve coil Abnormal when any of the following temperature conditions is satisfied for Clogged drain pipe 3 min.
Page 45 Check code Water leakage 2500 Chart 1 of 2 Abnormal points and detection methods Causes and check points Abnormal if drain sensor or float switch detects to be in the water during Reverse connection of extended piping (when cooling or dry operation. connecting multiple units) Reverse connection of indoor/ outdoor connector To release this abnormality, reset the power (turn OFF and ON). Defective thermistor of TH21 or TH22/23 Defective drain sensor or float switch TH21: Indoor intake temperature thermistor...
Page 46 Check code Water leakage 2500 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy Continued from the previous page [Drain sensor] [Float switch] Disconnect the connector for Disconnect the connector for drain sensor (CN31) and short- float switch (CN4F) and short- circuit between pins 1-2 on...
Page 47 Check code <Drain sensor models> Check cod Drain overflow protection 2502 Chart 1 of 3 Abnormal points and detection methods Causes and check points Drain pump (DP) 1 Malfunction of drain pump 1Let drain sensor self-heated, and if temperature rises slightly, as 2 Defective drain suspensive abnormality operation stops and changes to protect mode of Clogged drain pump...
Page 48 Check code <Drain sensor models> Drain overflow protection 2502 Chart 2 of 3 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is the resistance of drain Replace the drain sensor. sensor normal? <How to check the resistance>...
Page 49 Check code <Drain sensor models> Drain overflow protection 2502 Chart 3 of 3 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Check the voltage on both ends of the branch connector. Check the branch connector for breakage Is 200 V AC output? or contact failure.
Page 50 Check code <Float switch models> Drain overflow protection 2502 Chart 1 of 2 Abnormal points and detection methods Causes and check points Drain pump (DP) 1 Malfunction of drain pump 2 Defective drain 1Judge whether the sensor is in the water or in the air by turning the float switch ON/OFF. Clogged drain pump In the water: Detected that the float switch is ON for 15 seconds. Clogged drain pipe In the air: Detected that the float switch is OFF for 15 seconds.
Page 51 Check code <Float switch models> Drain overflow protection 2502 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a difficulty on the Solve the problem. moving part when pulling up ·...
Page 52 Check code <Drain sensor models> Drain sensor abnormality 2503 Abnormal points and detection methods Causes and check points <Drain sensor models> Contact failure of connector CN31 Abnormal if drain sensor detects to be short/open . Characteristic defect of thermistor Breakage or contact failure of drain sensor wiring. Replace the indoor controller board.
Page 53 Check code Compressor current interruption (Locked compressor) 4100 Chart 1 of 2 Abnormal points and detection methods Causes and check points Abnormal if overcurrent of DC bus or compressor is detected 30 seconds Closed stop valve after the compressor starts operating. Decrease of power supply voltage Looseness, disconnection or converse of compressor wiring connection...
Page 54 Check code Compressor current interruption (Locked compressor) 4100 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Set the model selection switch correctly, Are they set properly? then restart.
Page 55 Check code Compressor overcurrent interruption 4210 Chart 1 of 2 Abnormal points and detection methods Causes and check points Abnormal if overcurrent of DC or the compressor is detected within 30 Closed outdoor stop valve seconds after the compressor starts operating. Decrease of power supply voltage Looseness, disconnection or reverse phase of compressor wiring connection...
Page 56 Check code Compressor overcurrent interruption 4210 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Connect the compressor wiring (U, V and W phase) properly, then turn the power Are they connected properly? back ON.
Page 57 Check code Undervoltage/Overvoltage/PAM error/L1 open-phase/ 4220 Power synchronization signal error Chart 1 of 2 Abnormal points and detection methods Causes and check points Abnormal if any of following symptoms are detected; Decrease/increase of power supply voltage, or T open-phase ●Decrease of DC bus voltage to 400 V Disconnection of compressor wiring ●Increase of DC bus voltage to 760 V Malfunction of 52C...
Page 58 Check code Voltage shortage/Overvoltage/PAM error/L1 open-phase/ 4220 Power synchronization signal error Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. The black square (■) indicates a switch position. Diagnosis Remedy Continued from the previous page Is CN5 connected properly Correct the CN5 wiring.
Page 59 Check code Heat sink temperature trouble 4230 Abnormal points and detection methods Causes and check points Abnormal if TH8 detects a temperature outside the specified range, 95: Blocked outdoor fan [203-F] or more, during compressor operation. Malfunction of outdoor fan motor Blocked airflow path Thermistor <Heat sink> TH8: Rise of ambient temperature Characteristic defect of thermistor Malfunction of input circuit on outdoor power circuit board Malfunction of outdoor fan driving circuit...
Page 60 Check code Power module trouble 4250 Abnormal points and detection methods Causes and check points Abnormal if overcurrent of DC bus or compressor is detected 30seconds Closed outdoor stop valve after the compressor starts operating. To determine the source of Decrease of power supply voltage abnormality, either the compressor or the power module, drive the power Disconnection, looseness or conversed connection...
Page 61 Check code Rotational frequency of outdoor fan motor trouble 4400 Abnormal points and detection methods Causes and check points Abnormal if no rotational frequency is detected, or detected a value Malfunction of fan motor outside the specified range during fan motor operation. Disconnection of CNF connector Defective outdoor multi controller circuit board ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Page 62: Compressor Temperature Thermistor (Th4) Open/Short
Check code Compressor temperature thermistor (TH4) open/short 5101 <Detected in outdoor unit> Abnormal points and detection methods Causes and check points Abnormal if TH4 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled for 10 minutes after compressor Characteristic defect of thermistor starts, during defrosting operation, or for 10 minutes after returning from Defective outdoor multi controller circuit board...
Page 63: Suction Pipe Temperature Thermistor (Th6) Open/Short
Check code Suction pipe temperature thermistor (TH6) open/short 5102 <Detected in outdoor unit> Abnormal points and detection methods Causes and check points Abnormal if TH6 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled during 10 sec. to 10 min. after Characteristic defect of thermistor compressor starts, during defrosting operation, or for 10 min.
Page 64 Air inlet thermistor trouble (TH21) Check code Liquid pipe temperature thermistor trouble (TH22) 5101, 5102, 5103 Gas pipe temperature thermistor trouble (TH23) <Detected in indoor unit> Abnormal points and detection methods Causes and check points Abnormal if any of the following thermistor detected to be open/ short. Contact failure of connectors Characteristic defect of thermistor TH21: Air inlet thermistor...
Page 65: Outdoor Liquid Pipe Temperature Thermistor (Th3) Open/Short
Check code Outdoor liquid pipe temperature thermistor (TH3) open/short 5105 Abnormal points and detection methods Causes and check points Abnormal if TH3 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled during 10 sec. to 10 min. after Characteristic defect of thermistor compressor starts, during defrosting operation, or for 10 min.
Page 66: Ambient Thermistor (Th7) Open/Short
Check code Ambient thermistor (TH7) open/short 5106 Abnormal points and detection methods Causes and check points Abnormal if TH7 detects to be open/short Disconnection or contact failure of connectors Open:−40 [−40-F] or less Characteristic defect of thermistor Short: 90 [194-F] or more TH7: Thermistor <Ambient> Defective outdoor multi controller circuit board ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting...
Page 67: Hic Pipe Temperature Thermistor (Th2) Open/Short
Check code HIC pipe temperature thermistor (TH2) open/short 5109 Abnormal points and detection methods Causes and check points Abnormal if TH2 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled during 10 sec. to 10 min. after Characteristic defect of thermistor compressor starts, during defrosting operation, or for 10 min.
Page 68 Check code Heat sink temperature thermistor(TH8) open/short 5110 Abnormal points and detection methods Causes and check points Abnormal if TH8 detects to be open/short. Disconnection or contact failure of connectors Characteristic defect of thermistor Open:−34.8 [−36.6-F] or less Defective outdoor multi controller circuit board Short: 102 [215.6-F] or more TH8: Thermistor <Heat sink>...
Page 69 Check code High-pressure sensor (63HS) trouble 5201 Abnormal points and detection methods Causes and check points When the detected pressure in the high-pressure sensor is 1kgf/F or Defective high-pressure sensor less during operation, the compressor stops operation and enters into Decrease of internal pressure caused by gas an anti-restart mode for 3 minutes.
Page 70 Check code Low-pressure sensor (63LS) trouble 5202 Abnormal points and detection methods Causes and check points When the detected pressure in the low-pressure sensor is −2.3kgf/F Defective low-pressure sensor or less, or 23.1kgf/F or more during operation, the compressor stops Decrease of internal pressure caused by gas operation with a check code <5202>. leakage For 3 minutes after compressor restarting, during defrosting operation, Disconnection or contact failure of connector...
Page 71 Check code Models equipped with the float switch Contact failure of drain float switch 5701 Abnormal points and detection methods Causes and check points <Models equipped with the float switch> Contact failure of connector CN4F Abnormal if the connector on the drain float switch side CN4F is detected Defective indoor controller board to be disconnected. ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy <Models equipped with the float switch>...
Page 72: Duplex Address Error
Check code Duplex address error 6600 Abnormal points and detection methods Causes and check points Abnormal if 2 or more units with the same address are existing. There are 2 units or more with the same address in their controller among outdoor unit, indoor unit, Fresh Master, Lossnay or remote controller Noise interference on indoor/outdoor connectors ●Diagnosis of defectives...
Page 73 Check code Transmission processor H/W error 6602 Abnormal points and detection methods Causes and check points Abnormal if the transmission line shows "1" although the transmission A transmitting data collision occurred because of a processor transmitted "0". wiring work or polarity change has performed while the power is ON on either of the indoor/outdoor unit, Fresh Master or Lossnay Malfunction of transmitting circuit on transmission...
Page 74: Transmission Bus Busy Error
Check code Transmission bus BUSY error 6603 Abnormal points and detection methods Causes and check points Over error by collision The transmission processor is unable to transmit due Abnormal if no-transmission status caused by a transmitting data to a short-cycle voltage such as noise is mixed on collision is consecutive for 8 to 10minutes.
Page 75: Signal Communication Error With Transmission Processor
Check code Signal communication error with transmission processor 6606 Abnormal points and detection methods Causes and check points Abnormal if the data of unit/transmission processor were not normally Accidental disturbance such as noise or lightning transmitted. surge Hardware malfunction of transmission processor Abnormal if the address transmission from the unit processor was not normally transmitted.
Page 76 Check code No ACK error 6607 Chart 1 of 4 Abnormal points and detection methods Causes and check points Represents a common error detection The previous address unit does not exist since An abnormality detected by the sending side controller when receiving the address switch was changed while in electric no ACK from the receiving side, though signal was once sent.The continuity status.
Page 77 Check code No ACK error 6607 Chart 2 of 4 Abnormal points and detection methods Causes and check points While the indoor unit is operating with multi refrigerant system Fresh Master, an abnormality The cause of displayed address and attribute is on the Fresh Master is detected when the indoor unit transmits signal side to the remote controller while the outdoor unit with...
Page 78 Check code No ACK error 6607 Chart 3 of 4 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Procedure 1: Turn the power OFF of indoor/outdoor unit, Fresh Master, Lossnay and remote controller simultaneously for 2 minutes or more, then turn the power back ON.
Page 79 Check code No ACK error 6607 Chart 4 of 4 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Apply the correct kind of transmission line, Is the correct kind of transmission then perform the procedure 1.
Page 80: No Response Frame Error
Check code No response frame error 6608 Abnormal points and detection methods Causes and check points Abnormal if receiving no response command while already received ACK. Continuous failure of transmission due to noise etc The sending side searches the error in 30 seconds interval for 6 times Decline of transmission voltage/signal caused by continuously.
Page 81 Check code MA communication receive error 6831 6834 Chart 1 of 2 Abnormal points and detection methods Causes and check points Detected in remote controller or indoor unit: Contact failure of remote controller wirings Irregular Wiring When the main or sub remote controller cannot receive signal from (A wiring length, number of connecting remote indoor unit which has the "0"...
Page 82 Check code MA communication receive error 6831 6834 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy Continued from the previous page Refer to the chapter "Electrical Work". Connect the wiring properly as specified in Is the wiring connected the chapter "Electrical Work"...
Page 83 Check code MA communication send error 6832 6833 Chart 1 of 2 Abnormal points and detection methods Causes and check points Detected in remote controller or indoor unit. There are 2 remote controllers set as main. Malfunction of remote controller sending/receiving circuit Malfunction of sending/receiving circuit on indoor controller board...
Page 84 Check code MA communication send error 6832 6833 Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy Continued from the previous page Refer to the chapter "Electrical Work". Connect the wiring properly as specified in Is the wiring connected the chapter "Electrical Work"...
Page 85: Total Capacity Error
Check code Total capacity error 7100 Abnormal points and detection methods Causes and check points When the total of the number on connected indoor unit model names The total of number on connected indoor unit model exceeds the specified capacity level (130% of the number on the outdoor names exceeds the specified capacity level unit model name), a check code <7100> is displayed. ·P200 model: up to code 62 The model name code of the outdoor unit is registered wrongly.
Page 86: Capacity Code Error
Check code Capacity code error 7101 Abnormal points and detection methods Causes and check points When a connected indoor unit is incompatible, a check code <7101> is The model name of connected indoor unit (model code) displayed. is read as incompatible. The connectable indoor units are: ·P200 model: P15 to P250 model (code 3 to 50) ●Diagnosis of defectives...
Page 87: Connecting Excessive Number Of Units
Check code Connecting excessive number of units 7102 Abnormal points and detection methods Causes and check points When the connected AC unit exceeds the limit, a check code <7102> is Connecting more AC units than the limit displayed. Abnormal if connecting status does not comply with the following limit;...
Page 88: Address Setting Error
Check code Address setting error 7105 Abnormal points and detection methods Causes and check points The address setting of outdoor unit is wrong. Wrongly set address of indoor unit The outdoor unit is not set in 000, or in the range of 51 to 100.
Page 89: Remote Controller Diagnosis
8-2. REMOTE CONTROLLER DIAGNOSIS · For M-NET remote controller system If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below. First, check that the power-on indicator is lit. If the correct voltage (12 V DC) is not supplied to the remote controller, the indicator will not light.
Page 90 · For MA remote controller system Select "Service" from the Main menu, and press the button. Maintenance password Remote controller check Function setting Select "Remote controller check" with the F1 or F2 button, and press button. Select "Remote controller check" from the Service menu, and press Remote controller check button to start the remote controller check and see the check re- sults.
Page 91 8-3. REMOTE CONTROLLER TROUBLE 1Hr. CENTRALLY CONTROLLED ON OFF °C CLOCK CHECK FILTER CHECK MODE °C TEST RUN STAND BY “ ” Indicator: appears when current is carried. ERROR CODE FUNCTION NOT AVAILABLE DEFROST TEMP. ON/OFF FILTER CHECK TEST TIMER SET (M-NET Remote controller) (1) For M-NET remote controller systems Symptom or inspection code...
Page 92 8-4. THE FOLLOWING SYMPTOM DO NOT REPRESENT TROUBLE (EMERGENCY) Symptom Display of remote controller CAUSE Even the cooling (heating) "Cooling (Heating)" blinks The indoor unit can not cool (Heat) if other indoor units are heating operation selection button (Cooling). is pressed, the indoor unit cannot be operated.
Page 93 8-5. INTERNAL SWITCH FUNCTION TABLE PUMY-P200YKM PUMY-P200YKM-BS The black square (■) indicates a switch position. Continue to the next page OCH575...
Page 94 ■ The black square ( ) indicates a switch position. OCH575...
Page 95 8-6. OUTDOOR UNIT INPUT/OUTPUT CONNECTOR State (CN51) A Distant control board E Lamp power supply F Procure locally B Relay circuit C External output adapter (PAC-SA88HA-E) G Max. 10m CN51 D Outdoor unit control board : Error display lamp : Compressor operation lamp X, Y: Relay (Coil standard of 0.9W or less for 12 V DC) X, Y: Relay (1 mA DC) Auto change over (CN3N)
Page 96 8-7. HOW TO CHECK THE PARTS PUMY-P200YKM PUMY-P200YKM-BS Parts name Check points Thermistor (TH2) Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10 to 30 :) <HIC Pipe> Thermistor (TH3) Normal Abnormal <Outdoor liquid pipe>...
Page 97 Check method of DC fan motor (fan motor/outdoor multi controller circuit board) Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
Page 98 8-8. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <HIC pipe> (TH2) • Thermistor <Outdoor liquid pipe> (TH3) • Thermistor <Suction pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 k" ± 3 % B constant = 3480 ± 2 % =15exp{3480( – 273+t 15 k" 4.3 k" 9.6 k" 3.0 k"...
Page 99 8-9. TEST POINT DIAGRAM Outdoor multi controller circuit board PUMY-P200YKM PUMY-P200YKM-BS <CAUTION> TEST POINT 1 is high voltage. CN51 External signal Model selection Pump down Test run Forced defrost Model selection output CN102 Connect to the M-NET P.B (M-NET power circuit board)
Page 100 Outdoor power circuit board Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. PUMY-P200YKM Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken.
Page 101 M-NET power circuit board PUMY-P200YKM PUMY-P200YKM-BS Connect to the outdoor multi controller circuit board 1–2: 24–30 V DC 3–4: 24–30 V DC Connect to the electrical parts box Connect to the outdoor noise filter circuit board 1–3 : 220–240 V AC...
Page 102 Outdoor noise filter circuit board PUMY-P200YKM PUMY-P200YKM-BS LI1, LI2, LI3, NI CNAC1 POWER SUPPLY 220/230/240 V AC LI1-LI2/LI2-LI3/LI3-LI1 : 380/400/415 V AC input (Connect to the outdoor M-NET power LI1-NI/LI2-NI/LI3-NI : 220/230/240 V AC input circuit board (CN1)) (Connect to the terminal block (TB1))
Page 103 SW:setting 0..OFF 8-10. OUTDOOR UNIT FUNCTIONS 1..ON OCH575...
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Page 111: Electrical Wiring
· malfunction of unit or fire. Be sure to install N-Line. Without N-Line, it could cause damage to the unit. · 9-2. WIRING OF MAIN POWER SUPPLY AND EQUIPMENT CAPACITY PUMY-P200YKM PUMY-P200YKM-BS Breaker for Wiring and Current Leakage Power supply...
Page 112 Cross section area of Wire for Main Power and ON/OFF capacities 9-2-1. PUMY-P200YKM PUMY-P200YKM-BS Minimum Wire Cross-sectional area (mm Breaker Power Supply Breaker for Current Leakage Main for Wiring *1 Branch Ground Model Cable Outdoor 3N~380/400/415 P200 – 25 A 25 A 30 mA 0.1 sec.
Page 113: Wiring Transmission Cables
9-3. DESIGN FOR CONTROL WIRING Please note that the types and numbers of control wires needed by the CITY MULTI-S series will depend on the remote controllers and whether they are linked with the system. 9-3-1. Selection number of control wires M-NET remote controller Remote controller used in system control operations.
Page 114 9-5. SYSTEM SWITCH SETTING In order to identify the destinations of signals to the outdoor units, indoor units, and remote controller of the MULTI-S series, each microprocessor must be assigned an identification number (address). The addresses of outdoor units, indoor units, and remote controller must be set using their settings switches.
Page 115: Refrigerant Piping Tasks
REFRIGERANT PIPING TASKS Line-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit Total Piping Length A+B+C+a+b+c+d [ 150 m Permissible Farthest Piping Length A+B+C+d [ 80 m Length Farthest Piping Length After First Branch B+C+d [ 30 m High/Low Difference in Indoor/Outdoor Section 50 meters or less (If the outdoor unit is lower, 40 meters or less)
Page 116 Header-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit Total Piping Length A+a+b+c+d [ 150 m Permissible Farthest Piping Length A+d [ 80 m Length Farthest Piping Length After First Branch d is 30 meters or less Permissible High/ High/Low Difference in Indoor/Outdoor Section 50 meters or less (If the outdoor unit is lower, 40 meters or less)
Page 117 Note: Pipe re-branching after the header branching is not possible. Outdoor unit Method of Combined Branching of Lines and First branching (branching Headers joint) Connection Examples Branching joint (Connecting to 5 Indoor Units) Indoor unit Branching header Blind caps Total Piping Length A+B+C+a+b+c+d+e is 150 meters or less Permissible Farthest Piping Length...
Page 118: Precautions Against Refrigerant Leakage
10-2. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 10-2-1. Introduction R410A refrigerant of this air conditioner is non-toxic and non-flam- mable but leaking of large amount from an indoor unit into the room Outdoor unit where the unit is installed may be deleterious. Direction To prevent possible injury, the rooms should be large enough to of refrigerant flow...
Page 119: Disassembly Procedure
DISASSEMBLY PROCEDURE PUMY-P200YKM PUMY-P200YKM-BS Note: Turn OFF the power supply before disassembly. PHOTOS & ILLUSTRATION OPERATING PROCEDURE 1. Removing the service panel and top panel Top panel Photo 1 Top panel fixing screws (1) Remove 4 service panel fixing screws (5 × 12) and slide...
Page 120 From the previous page. OPERATING PROCEDURE PHOTOS & ILLUSTRATION Photo 5 Electrical parts box (6) Remove 2 electrical parts box fixing screws (4 × 10) and detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.
Page 121: Heating
PHOTOS OPERATING PROCEDURE Photo 9-1 6. Removing the thermistors Thermistor Thermistor <HIC> (TH2) and thermistor <Compressor> (TH4) <HIC> (TH2) (1) Remove the service panel. (See Photo 1) Thermistor (2) Disconnect the connectors, TH2 (black) and TH4 (white), <Compressor> (TH4) on the Multi controller board in the electrical parts box. (3) Loosen the clamp for the lead wire in the rear of the electri- cal parts box.
Page 122 OPERATING PROCEDURE PHOTOS Photo 11 & 12 9. Removing bypass valve coil (SV1) and bypass valve (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and Bypass valve Bypass valve remove the front cover panel.
Page 123 OPERATING PROCEDURE PHOTOS 13. Removing the reactor (DCL) Photo 13 (1) Remove the service panel. (See Photo 1) Electrical parts (2) Disconnect the lead wires from the reactor. (See Photo5) (3) Disconnect the connectors of reactor on the bottom plate of the electrical parts box.
Page 124 OPERATING PROCEDURE PHOTOS Photo 14 14. Removing the compressor (MC) (1) Remove the service panel. (See Photo 1) Valve bed (2) Remove the top panel. (See Photo 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and Valve bed remove the front cover panel.
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Page 126 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2014 MITSUBISHI ELECTRIC CORPORATION Distributed in Oct. 2014 No.OCH575 New publication, effective Oct. 2014 Made in Japan Specifications are subject to change without notice.

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