Table of Contents
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SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Series PCY
Indoor unit
[Model Name]
PCY-P18KA
PCY-P24KA
PCY-P30KA
PCY-P36KA
PCY-P42KA
PCY-P48KA
INDOOR UNIT
WIRELESS REMOTE
CONTROLLER
ON/OFF
TEMP
(Option)
[Service Ref.]
PCY-P18KA.TH
PCY-P24KA.TH
PCY-P30KA.TH
PCY-P36KA.TH
PCY-P42KA.TH
PCY-P48KA.TH
Model name
indication
WIRED REMOTE
CONTROLLER
TEMP.
ON/OFF
(Option)
Revision:
• Added
• Some descriptions has
• Please void OCH550.
Note:
• This manual describes ser-
• RoHS compliant products
CONTENTS
1. REFERENCE MANUAL .................................. 2
2. SAFETY PRECAUTION .................................. 3
3. PARTS NAMES AND FUNCTIONS ................ 4
4. SPECIFICATIONS ........................................... 9
5. NOISE CRITERION CURVES ....................... 11
6. OUTLINES AND DIMENSIONS ..................... 12
7. WIRING DIAGRAM ............................................. 15
8. REFRIGERANT SYSTEM DIAGRAM ............. 16
9. TROUBLESHOOTING ................................... 17
10. DISASSEMBLY PROCEDURE ...................... 32
PARTS CATALOG (OCB550)
March 2014
No. OCH550
REVISED EDITION-A
PCY-P42KA.TH and
PCY-P48KA.TH in
REVISED EDITION-A.
been modified.
vice data of the indoor units
only .
have <G> mark on the
spec name plate.
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Table of Contents
Related Manuals for Mitsubishi Electric Mr.Slim PCY-P18KA.TH
Summary of Contents for Mitsubishi Electric Mr.Slim PCY-P18KA.TH
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Page 1: Table Of Contents
SPLIT-TYPE, AIR CONDITIONERS March 2014 No. OCH550 REVISED EDITION-A SERVICE MANUAL Series PCY Revision: • Added Indoor unit PCY-P42KA.TH and [Model Name] [Service Ref.] PCY-P48KA.TH in PCY-P18KA.TH REVISED EDITION-A. PCY-P18KA • Some descriptions has been modified. PCY-P24KA.TH PCY-P24KA • Please void OCH550. PCY-P30KA.TH Note: PCY-P30KA... -
Page 2: Reference Manual
REFERENCE MANUAL 1-1. OUTDOOR UNIT’S SERVICE MANUAL Service Ref Service Manual No. OCH552 SUY-KA18/24/30/36VA.TH OCB552 PUY-P42/48VKA.TH(-T) OCH558 PUY-P42/48YKA.TH(-T) OCB558 1-2. TECHNICAL DATA BOOK Series (Outdoor unit) Data Book No. SUY-KA▪VA.TH OCS27 PUY-P▪VKA.TH OCS29 PUY-P▪YKA.TH OCH550A... -
Page 3: Safety Precaution
SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. -
Page 4: Parts Names And Functions
[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 5 3-2. WIRED REMOTE CONTROLLER <PAR-21MAA> The functions which can be used are restricted according to the model. “Sensor” indication Display Section Day-of-Week Displays when the remote controller sensor is used. Shows the current day of the week. For the purpose of explanation, all parts of the display are shown.
- Page 6 3-3. WIRELESS REMOTE CONTROLLER (OPTION) The functions which can be used are restricted according to each model. CHECK TEST RUN display Indicate that the unit is being checked or test-run. MODEL SELECT display display Blinks when model is selected. Lights up while the signal is transmitted to the indoor unit when the button is pressed.
- Page 7 3-4. WIRED REMOTE CONTROLLER (OPTION) <PAR-31MAA> The functions which can be used are restricted according to each model. The main display can be displayed in two different modes: "Full" and "Basic." Display The initial setting is "Full." 1 Operation mode Appears when the buttons are locked.
- Page 8 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. • Select a desired vane setting from five different settings. (Lossnay) Use to turn ON / OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
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Page 9: Specifications
SPECIFICATIONS 4-1. SPECIFICATIONS Service Ref. PCY-P18KA.TH Mode Cooling Power supply(phase, cycle, voltage) Single phase, 50Hz, 220-240V/Single phase, 60Hz, 220V Input 0.07 Running current 0.61 External finish Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan(drive) × No. Sirocco fan (direct) × 3 Fan motor output 0.095 Airflow(Low-Medium2-Medium1-High) - Page 10 Service Ref. PCY-P36/42/48KA.TH Mode Cooling Power supply(phase, cycle, voltage) Single phase, 50Hz, 220-240V/Single phase, 60Hz, 220V Input 0.16 Running current 1.35 External finish Munsell 6.4Y 8.9/0.4 Heat exchanger Plate fin coil Fan(drive) × No. Sirocco fan (direct) × 4 Fan motor output 0.160 Airflow(Low-Medium2-Medium1-High) 27-29-32-34...
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Page 11: Noise Criterion Curves
NOISE CRITERION CURVES PCY-P18KA.TH PCY-P24KA.TH NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High Medium1 Medium1 Medium2 Medium2 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE... -
Page 12: Outlines And Dimensions
OUTLINES AND DIMENSIONS PCY-P18KA.TH Unit: mm PCY-P24KA.TH OCH550A... - Page 13 PCY-P30KA.TH Unit: mm PCY-P36KA.TH PCY-P42KA.TH PCY-P48KA.TH OCH550A...
- Page 14 Unit: mm WIRED REMOTE CONTROLLER PAR-21MAA PAR-31MAA (Option) 19.5 WIRELESS REMOTE CONTROLLER (Option) OCH550A...
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Page 15: Wiring Diagram
WIRING DIAGRAM PCY-P18KA.TH PCY-P24KA.TH PCY-P30KA.TH PCY-P36KA.TH PCY-P42KA.TH PCY-P48KA.TH [LEGEND] SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) CN2L TB5,TB6 TERMINAL BLOCK (REMOTE CONTROLLER CONNECTOR (LOSSNAY) CN32 CONNECTOR (REMOTE SWITCH) TRANSMISSION LINE) CN41 CONNECTOR (HA TERMINAL-A) ROOM TEMP. THERMISTOR CN51 CONNECTOR (CENTRALLY CONTROL) (0°C/15kΩ, 25°C/5.4kΩ... -
Page 16: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PCY-P18KA.TH PCY-P24KA.TH PCY-P30KA.TH PCY-P36KA.TH PCY-P42KA.TH PCY-P48KA.TH Strainer Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant flow in cooling Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid Room temperature (TH2) thermistor (TH1) Strainer Distributor with strainer 1/2 #50/#50 OCH550A... -
Page 17: Troubleshooting
TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code display by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged and displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below. Check the contents below before investigating details. - Page 18 9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER <In case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> Wired remote controller 1 Turn on the power.
- Page 19 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp flash pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
- Page 20 • If the unit cannot be operated properly after test run, refer to the following table to find the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) •For about 2 minutes following power-on,op- For about 2 After LED 1, 2 are lighted, LED 2 is PLEASE WAIT turned off, then only LED 1 is...
- Page 21 9-3. SELF-DIAGNOSIS ACTION TABLE Abnormal point and detection method Countermeasure Check code Cause Room temperature thermistor (TH1) 1 Defective thermistor 1–3 Check resistance value of thermistor. 1 The unit is in 3-minute resume characteristics 0: ...15.0k" prevention mode if short/open of 2 Contact failure of connector 10: ..
- Page 22 Abnormal point and detection method Countermeasure Check code Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) operating 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove blockage.
- Page 23 Check code Abnormal point and detection method Countermeasure Cause Remote controller transmission 1 Contact failure at transmission 1 Check disconnection or looseness of indoor error(E0)/signal receiving error(E4) wire of remote controller unit or transmission wire of remote controller. 1 Abnormal if main or sub remote con- 2 All remote controllers are set 2 Set one of the remote controllers “main”...
- Page 24 Check code Abnormal point and detection method Countermeasure Cause Indoor/outdoor unit communication 1 Defective transmitting receiving 1-3 Turn the power off, and on again to check. error (Transmitting error) circuit of indoor controller board If abnormality generates again, replace Abnormal if “1” receiving is detected 30 2 Noise has entered into power indoor controller board.
- Page 25 9-4. TROUBLESHOOTING OF PROBLEMS Phenomena Cause Countermeasure (1) LED2 on indoor controller board • When LED1 on indoor controller board is also off. is off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power door unit.
- Page 26 Phenomena Cause Countermeasure (2) LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire is blinking. Connection failure of indoor/outdoor unit connecting for connection failure. wire • When LED1 is lit. 1 Check the connection of remote controller 1 Miswiring of remote controller wires wires in case of twin triple indoor unit...
- Page 27 9-5. EMERGENCY OPERATION 9-5-1. When wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote control- ler malfunctions, the emergency operation can be done using the emer- gency buttons on the grille.
- Page 28 9-6. HOW TO CHECK THE PARTS PCY-P18KA.TH PCY-P24KA.TH PCY-P30KA.TH PCY-P36KA.TH PCY-P42KA.TH PCY-P48KA.TH Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature of 10°C~30°C) Pipe temperature thermistor/ liquid (TH2) Normal Abnormal (Refer to the Thermistor characteristic graph below.)
- Page 29 9-6-2. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. board and fan motor.) (It causes trouble of the indoor controller circuit Self check...
- Page 30 9-7. TEST POINT DIAGRAM Indoor controller board PCY-P18KA.TH PCY-P24KA.TH PCY-P30KA.TH PCY-P36KA.TH PCY-P42KA.TH PCY-P48KA.TH LED3 Transmission (Indoor/outdoor) CN90 Connect to the wireless Vane motor output (MV) remote controller board 12 V pulse output (CNB) Model selection CN105 Capacity setting Jumper wire J41, J42 Emergency operation Pair No.
- Page 31 9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the DIP switch and the jumper wire on controller board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are preset in the nonvolatile memory of the controller board of the unit. (Marks in the table below) Jumper wire ( : Short...
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Page 32: Disassembly Procedure
DISASSEMBLY PROCEDURE PCY-P18KA.TH PCY-P24KA.TH PCY-P30KA.TH Be careful when removing heavy parts. PCY-P36KA.TH PCY-P42KA.TH PCY-P48KA.TH Photo: PCY-P36KA.TH OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Figure 1 1. Removing the air intake grilles (with air filters) (1) Slide the air intake grille holding knobs (at 2 or 3 locations) to the rear to open each air intake grille. - Page 33 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 4. Removing the room temperature thermistor (TH1) Photo 3 (1) Remove the air intake grilles. (See Figure 1, 2) Casing (2) Remove the beam. (See Photo 1) (3) Remove the electrical box cover. (See Photo 1) (4) Pull down the electrical box by removing 2 screws (4 ×...
- Page 34 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 6. Removing the sirocco fans (3-connection side) Photo 8 (1) Remove the air intake grilles. (See Figure 1, 2) 3-connection (2) Remove the beam. (See Photo 1) side (3) Pull down the electrical box cover. (See Photo 1) (4) Remove the electrical box.
- Page 35 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 12 9. Removing the under panel (1) Remove the air intake grilles. (See Figure 1, 2) (2) Remove the side panels (right and left). (See Figure 4, 5) (3) Remove the beam. (See Photo 1) (4) Remove the electric box cover.
- Page 36 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 18 12. Removing the guide vane (1) Remove the air intake grilles. (See Figure 1, 2) (2) Remove the side panels (right and left). (See Figure 4, 5) Guide vane fixing screw (3) Remove the under panel. (See Photo 12) (4) Remove the drain pan.
- Page 37 OCH550A...
- Page 38 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2013 MITSUBISHI ELECTRIC CORPORATION Distributed in Mar. 2014 No.OCH550 REVISED EDITION-A Distributed in Oct. 2013 No.OCH550 New publication, effective Mar. 2014 Made in Japan Specifications are subject to change without notice.