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Operating Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model Name]
PCA-RP71HAQ
PCA-RP125HAQ
INDOOR UNIT
Model name
indication
TEMP.
REMOTE CONTROLLER
[Service Ref.]
PCA-RP71HAQ
PCA-RP71HAQ-ER
PCA-RP125HAQ
ON/OFF
(Option)
REVISED EDITION-A
Revision:
Added
•
PCA-RP71HAQR-ER in
REVISED EDITION-A.
• Some descriptions have been
modified.
• Please void OCH492.
Notes:
• This manual describes service
data of the indoor units only.
• RoHS compliant products have
<G> mark on the spec name
plate.
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. PARTS NAMES AND FUNCTIONS ................. 6
4. SPECIFICATIONS ........................................... 10
5. NOISE CRITERION CURVES ........................ 11
6. OUTLINES AND DIMENSIONS ...................... 12
7. WIRING DIAGRAM ............................................. 14
8. REFRIGERANT SYSTEM DIAGRAM ............. 15
9. TROUBLESHOOTING .................................... 16
10. SPECIAL FUNCTION ..................................... 27
11. DISASSEMBLY PROCEDURE ....................... 32
PARTS CATALOG (OCB492)
July 2014
No. OCH492
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Summary of Contents for Mitsubishi PCA-RP71HAQ
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Page 1: Table Of Contents
No. OCH492 REVISED EDITION-A SERVICE MANUAL Indoor unit Revision: Added • [Model Name] [Service Ref.] PCA-RP71HAQR-ER in PCA-RP71HAQ REVISED EDITION-A. PCA-RP71HAQ • Some descriptions have been modified. PCA-RP71HAQ-ER • Please void OCH492. PCA-RP125HAQ Notes: PCA-RP125HAQ • This manual describes service data of the indoor units only. -
Page 2: Reference Manual
REFERENCE MANUAL 1-1. OUTDOOR UNIT’S SERVICE MANUAL Model Name Service Ref. Service Manual No. PUHZ-RP71VHA4 PUHZ-RP71VHA4 OCH451 PUHZ-RP125/140VKA PUHZ-RP125/140VKA OCB451 PUHZ-RP125/140/250YKA PUHZ-RP125/140/250YKA PU(H)-P71VHAR3 PU(H)-P71VHAR3.UK OC379 PU(H)-P71/125/140YHAR3 PU(H)-P71/125/140YHAR3.UK PUHZ-P125/140VHA3R2 PUHZ-P125/140VHA3R2.UK OCH415/OCB415 PUHZ-P125/140YHAR1 PUHZ-P125/140YHAR1.UK PUHZ-P250YHA3R2 PUHZ-P250YHA3R2 OCH424/OCB424 OCH527 PUHZ-ZRP71VHA PUHZ-ZRP71VHAR1(-ER) OCB527 1-2. TECHNICAL DATA BOOK Series (Outdoor unit) Manual No. -
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 R407C Do not use the existing refrigerant piping. Use liquid refrigerant to charge the system. The old refrigerant and lubricant in the existing piping If gas refrigerant is used to seal the system, the composition contains a large amount of chlorine which may cause the... - Page 4 [1] Cautions for service · After recovering the all refrigerant in the unit, proceed to working. · Do not release refrigerant in the air. · After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [2] Refrigerant recharging (1) Refrigerant recharging process 1Direct charging from the cylinder.
- Page 5 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. In case of using the existing pipes for R22, be careful with Vacuum pump oil may flow back into refrigerant cycle and the followings.
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Page 6: Parts Names And Functions
Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Tool name Specifications Gauge manifold · Only for R410A · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·... -
Page 7: Basic Mode
3-2. WIRED REMOTE CONTROLLER (OPTION) <PAR-30MAA><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: Operation Section
3-3. WIRED REMOTE CONTROLLER (OPTION) <PAR-21MAA> The functions which can be used are restricted according to each 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 purposes of explanation, all parts of the display are shown. -
Page 10: Specifications
SPECIFICATIONS PCA-RP71HAQ PCA-RP71HAQ-ER Service Ref. Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230V Input 0.09 0.09 Running current 0.43 0.43 Starting current 0.86 0.86 External finish Stainless steel Heat exchanger Plate fin coil Fan (drive) × No. -
Page 11: Noise Criterion Curves
NOISE CRITERION CURVES PCA-RP125HAQ NOTCH PCA-RP71HAQ SPL(dB) LINE NOTCH SPL(dB) LINE High High PCA-RP71HAQ-ER 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 PCA-RP71HAQ Unit: mm PCA-RP71HAQ-ER OCH492A... - Page 13 Unit: mm PCA-RP125HAQ OCH492A...
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Page 14: Wiring Diagram
WIRING DIAGRAM PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER [LEGEND] Check code Symptom SYMBOL NAME SYMBOL NAME P. B INDOOR POWER BOARD MF1, MF2 FAN MOTOR Abnormality of room temperature thermistor TH1) I. B INDOOR CONTROLLER BOARD C1, C2 CAPACITOR (FAN MOTOR Abnormality of pipe temperature thermistor/Liquid... -
Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER Strainer Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid Room temperature (TH2) thermistor (TH1) Strainer... -
Page 16: Troubleshooting
TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. - Page 17 Note: Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. Please 9-2. SELF-DIAGNOSIS ACTION TABLE refer to the outdoor unit's service manual for the details. Abnormal point and detection method Countermeasure Check Code...
- Page 18 Abnormal point and detection method Countermeasure Check Code Cause Freezing/overheating protection is oper- (Cooling or drying mode) (Cooling or drying mode) ating 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 19 Abnormal point and detection method Countermeasure Check Code Cause Pipe temperature thermistor / 1 Defective thermistor 1–3 Check resistance value of thermistor. For characteristics, refer to (P1) above. Condenser-Evaporator (TH5) characteristics 2 Check contact failure of connector (CN44) 1 The unit is in 3-minute resume protec- 2 Contact failure of connector on the indoor controller board.
- Page 20 Abnormal point and detection method Countermeasure Check Code Cause Indoor/outdoor unit communication Note: 1 Contact failure, short circuit or, error (Signal receiving error) Check LED display on the outdoor control miswiring (converse wiring) of circuit board. (Connect A-control service 1 Abnormal if indoor controller board indoor/outdoor unit connecting cannot receive any signal normally for 6 tool, PAC-SK52ST.)
- Page 21 9-3. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is also off. 1 Check the voltage of outdoor power 1 Power supply of rated voltage is not supplied to out- supply terminal block (L, N) or (L3, N).
- Page 22 Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure (2)LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire Connection failure of indoor/outdoor unit connecting for connection failure.
- Page 23 9-5. HOW TO CHECK THE PARTS PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature 10 to 30:) Pipe temperature thermistor/liquid (TH2) Normal Abnormal Refer to the <Thermistor Characteristic Graph>...
- Page 24 9-6. TEST POINT DIAGRAM 9-6-1. Power board PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER CNSK Connect to the indoor controller board (CNDK) Between 1 to 3 220–240 V AC CN2S Connect to the indoor controller board (CN2D) Between 1 to 3 12.6–13.7 V DC (Pin1 (+))
- Page 25 9-6-2. Indoor controller board PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER CN2D LED1 LED3 Connector to the indoor LED2 Power supply Transmission power board (CN2S) Power supply (I.B) (Indoor/outdoor) (12.5–13.7 V DC) (R.B) CN3C Transmission – (Indoor/outdoor) (0–24 V DC) CN22 Remote controller connecting wire –...
- Page 26 1 2 3 4 5 settings PCA-RP • HAQ Service board MODEL Capacity 1 2 3 4 5 settings PCA-RP71HAQ 1 2 3 4 5 PCA-RP125HAQ <Initial setting> Wireless remote controller: 0 Control PCB setting Wireless remote Control PCB: (for both J41 and J42)
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Page 27: Special Function
SPECIAL FUNCTION 10-1. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 10-1-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub unit operate alternately according to the interval of rotation setting. Main and sub unit should be set by refrigerant address. (Outdoor DIP switch setting) Refrigerant address "00"... - Page 28 10-1-2. How to set rotation function (Back-up function, 2nd stage cut-in function) You can set these functions by wired remote controller. (Maintenance monitor) NOTICE Both main and sub unit should be set in same setting. Every time replacing indoor controller board for servicing, the function should be set again. (1) Request Code List Rotation setting Setting No.
- Page 29 (2) Setting method of each function by wired remote controller B: Refrigerant address C: Data display area D: Request code display area 1. Stop operation(1). 2. Press the button (2) for 3 seconds so that [Maintenance mode] appears on the screen (A). TEST After a while, [00] appears in the refrigerant address number display area.(at B ) 3.
- Page 30 (3) Setting method of each function by wired remote controller ■ PAR-30MAA/PAR-31MAA Stop operation ( Check menu Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Select "Service" from the Main menu, and press the button. Request code Service menu: Cursor Select "Check"...
- Page 31 (4) Rotation and back up operation PAR-30MAA/PAR-31MAA Press the button. Main Main menu Maintenance Initial setting Select "Service" with the [Cursor] buttons ( ) or the [Page] buttons ( Service ), and press the button. Main display: Cursor Page Enter the current maintenance password (4 numerical digits). Service menu •...
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Page 32: Disassembly Procedure
DISASSEMBLY PROCEDURE PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the oil filter Figure 1 (1) Slide the oil filter towards you to remove. (See Figure 1) Oil filter Photo 1 2. Removing the terminal block box cover... - Page 33 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 4. Removing the fan motor Photo 4 (1) Remove the oil filter. (See Figure 1) (2) Remove the control box cover. (See Photo 2) Filter rail (3) Remove the room temperature thermistor connector (CN20) on the indoor controller board. (See Photo 3) (4) Remove a filter rail that is the nearest to the control box.
- Page 34 OPERATING PROCEDURE PHOTOS 6. Removing the pipe temperature thermistor Photo 8 Relay connector (1) Remove the oil filter. (See Figure 1) (2) Remove the fan guard. (See Photo 1) (3) Remove the terminal block box cover. (4) Remove the white relay connector (2P) in the terminal block box.
- Page 35 OPERATING PROCEDURE PHOTOS 9. Removing the guide vane Photo 13 Guide vanes (1) Remove the oil filter. (See Figure 1) (2) Remove the 3 filter rails. (See Photo 1, 4) (3) Remove the under panel. (See Photo 11) (4) Remove the drain pan. (See Photo 12) (5) Remove the 3 screws (4 ×...
- Page 36 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2010 MITSUBISHI ELECTRIC CORPORATION New publication, effective Jul. 2014 Distributed in Jul. 2014 No.OCH492 REVISED EDITION-A Specifications are subject to change without notice. Distributed in Dec. 2010 No.OCH492...