SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS May 2008 No. OC329 REVISED EDITION-B SERVICE MANUAL Indoor unit [Model names] [Service Ref.] PCA-RP71HA PCA-RP71HA#1 PCA-RP125HA PCA-RP125HA#1 PCA-RP71HA PCA-RP125HA Revision: • PCA-RP71·125HA#1 are added in REVISED EDITION-B. • Some descriptions have been modified. • Please void OC329 REVISED EDITION-A. Note: • This manual describes only service data of the indoor units.
1 TECHNICAL CHANGES PCA-RP71HA PCA-RP125HA PCA-RP71HA#1 PCA-RP125HA#1 INDOOR CONTROLLER BOARD(I.B.) has been changed. 2 REFERENCE MANUAL 2-1. OUTDOOR UNIT’S SERVICE MANUAL Service Ref. Service Manual No. PUHZ-RP35/50/60/71/100/125/140VHA(1) PUHZ-RP100/125/140YHA PUHZ-RP71/100/125/140VHA(1)-A PUHZ-RP200/250YHA(1)(2) PUHZ-RP200/250YHA(1)-A PU(H)-P • VGAA.UK PU(H)-P • YGAA.UK PUHZ-P100/125/140VHA.
SAFETY PRECAUTION 3-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 3-2. 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 contains a large amount of chlorine which may cause the lubricant deterioration of the new unit.
[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. ·R407C cylinder are available on the market has a syphon pipe. ·Leave the syphon pipe cylinder standing and recharge it.
CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. In case of using the existing pipes for R22, be careful with the followings. · For RP71VHA3 and RP125 be sure to perform replacement operation before test run. · Change flare nut to the one provided with this product. Use a newly flared pipe. · Avoid using thin pipes. If other refrigerant (R22 etc.
Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. 1 Tool name Gauge manifold Specifications ·Only for R410A ·Use the existing fitting specifications. (UNF1/2) ·Use high-tension side pressure of 5.3MPa·G or over. 2 Charge hose ·Only for R410A ·Use pressure performance of 5.09MPa·G or over. 3 Electronic scale 4 Gas leak detector ·Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check ·Attach on vacuum pump.
4 PART NAMES AND FUNCTIONS Indoor (Main) Unit Left/right guide vanes Change the direction of airflow from the horizontal blower. Air outlet Oil filter (Air intake) + It prevents oil from getting into the unit. Up/down guide vanes Change the direction of airflow from the vartical blower. Air intake Remote controller Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
Display “Sensor” indication Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit. Shows the current day of the week. Time/Timer Display “Locked” indicator Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, shows the time remaining. Indicates that remote controller buttons have been locked.
INDOOR UNIT INDOOR UNIT 5 SPECIFICATIONS Service Ref. Mode Power supply(phase, cycle, voltage) Input Running current Starting current External finish Heat exchanger Fan Fan(drive) x No. Fan motor output Airflow(Low-High) External static pressure Operation control & Thermostat Noise level(Low-High) Unit drain pipe I.D. Dimensions W D H Weight Service Ref. Mode Power supply(phase, cycle, voltage) Input Running current Starting current External finish Heat exchanger Fan Fan(drive) x No.
6 NOISE CRITERION CURVES NOTCH SPL(dB) High 38 Low 34 LINE PCA-RP125HA PCA-RP125HA#1 90 90 80 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 OCTAVE BAND SOUND PRESSURE LEVEL, dB ( 0dB = 0.0002 μbar ) OCTAVE BAND SOUND PRESSURE LEVEL, dB ( 0dB = 0.0002 μbar ) PCA-RP71HA PCA-RP71HA#1 LINE NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 NC-20 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-20 10 10 63 125 250 500 1000 2000 4000 63 8000 ceiling 1m about 1.
1098 1136 986 75 175 70 Filter element for the exchange model:PAC-SG38KF-E (12pcs.
Use the current nuts meeting the pipe size of the outdoor unit. NOTES. 1.Use M10 or W3/8 screw for anchor bolt. The half bottom of FAN CASING can be separated. 1482 1520 outlet> 75 21 GAS SIDE LIQUID SIDE Available pipe size 1370 320 495 : 19.05 : 15.88 : 9.
8 WIRING DIAGRAM PCA-RP71HA PCA-RP71HA#1 PCA-RP125HA PCA-RP125HA#1 [ LEGEND ] SYMBOL P. B I. B FUSE ZNR CN2L CN32 CN41 CN51 LED1 LED2 LED3 X1 X4 X5 X6 SW1 SW2 NAME INDOOR POWER BOARD INDOOR CONTROLLER BOARD FUSE (T6.3AL250V) VARISTOR CONNECTOR (LOSSNAY) CONNECTOR (REMOTE SWITCH) CONNECTOR (HA TERMINAL-A) CONNECTOR (CENTRALLY CONTROLL) POWER SUPPLY (I. B) POWER SUPPLY (R.
9 REFRIGERANT SYSTEM DIAGRAM PCA-RP71HA PCA-RP125HA PCA-RP71HA#1 PCA-RP125HA#1 Strainer #50 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 (TH2) Room temperature thermistor (TH1) Distributor with strainer #50 Downloaded from AC-Manual.
10 TROUBLESHOOTING 10-1. TROUBLESHOOTING Present and past error 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. Note : Refer to the manual of outdoor unit for malfunction-diagnosis method by remote controller.
10-2. SELF-DIAGNOSIS ACTION TABLE Error Code P1 Note: Refer to the manual of outdoor unit for the details of display such as F, U, and other E. Abnormal point and detection method Cause Countermeasure Room temperature thermistor (TH1) 1 The unit is in 3-minute resume prevention mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after 3 minutes. (The unit returns to normal operation, if it has been reset normally.
Error Code P6 Abnormal point and detection method Freezing/overheating protection is working 1 Freezing protection (Cooling mode) The unit is in 6-minute resume prevention mode if pipe temperature stays under -15: for 3 minutes, 3 minutes after the compressor started. Abnormal if it stays under -15: for 3 minutes again within 16 minutes after 6-minute resume prevention mode.
Error Code P9 Abnormal point and detection method Pipe temperature thermistor / Condenser-Evaporator (TH5) 1 The unit is in 3-minute resume protection mode if short/open of thermistor is detected. Abnormal if the unit does not get back to normal within 3 minutes. (The unit returns to normal operation, if it has been reset normally.
Error Code Abnornal point and detection method Cause Countermeasure E6 Indoor/outdoor unit communication error (Signal receiving error) 1 Abnormal if indoor controller board cannot receive any signal normally for 6 minutes after turning the power on. 2 Abnormal if indoor controller board cannot receive any signal normally for 3 minutes.
10-3. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena (1)LED2 on indoor controller board is off. Cause • When LED1 on indoor controller board is also off. 1 Power supply of rated voltage is not supplied to outdoor unit. 2 Defective outdoor controller circuit board. 3 Power supply of 220~240V is not supplied to indoor unit. 4 Defective indoor power board. 5 Defective indoor controller board.
Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena (2)LED2 on indoor controller board is blinking. Cause Countermeasure • 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. wire • When LED1 is lit.
10-5. HOW TO CHECK THE PARTS PCA-RP71HA PCA-RP71HA#1 PCA-RP125HA PCA-RP125HA#1 Parts name Room temperature thermistor (TH1) Check points Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10 ~30 ) Pipe temperature thermistor (TH2) Condenser/Evaporator temperature thermistor (TH5) Fan motor(MF) Relay connector Protector Normal Abnormal 4.3k ~9.6k Open or short Measure the resistance between the terminals with a tester.
10-6. TEST POINT DIAGRAM 10-6-1. Power board PCA-RP71HA PCA-RP125HA PCA-RP71HA#1 PCA-RP125HA#1 CN2S Connect to the indoor controller board (CN2D) Between 1 to 3 12.6-13.7V DC (Pin1 (+)) CNSK Connect to the indoor controller board (CNDK) Between 1 to 3 220-240V AC Downloaded from AC-Manual.
10-6-2. Indoor controller board PCA-RP71HA PCA-RP125HA PCA-RP71HA#1 PCA-RP125HA#1 LED3 Transmission (Indoor/outdoor) LED2 Power supply (R.B) – + + CN3C Transmission (Indoor/outdoor) (0~24V DC) LED1 Power supply (I.B) } CN2D Connector to the indoor power board (CN2S) (12.5~13.7V DC) – CND Power supply input (220~240V AC) CN22 Remote controller connecting wire (10.4~14.
10-7. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the dip switch and the jumper wire on control p.c. board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are memorized in the nonvolatile memory of the control p.c. board of the unit.
11 SPECIAL FUNCTION 11-1. ROTATION FUNCTION(AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) For PCA-RP71/125HA#1 11-1-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub unit operate alternately according to the interval of rotation setting. w Main and sub unit should be set by refrigerant address.(Outdoor Dip switch setting) Refrigerant address"00" Main unit Refrigerant address"01" Sub unit · When error occurrs to one unit, another unit will start operation.
11-1-2. 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. (Request code) No.1 (310) No.2 (311) No.3 (312) No.4 (313) No.5 (314) No.6 (315) No.7 (316) No.8 (317) No.
(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( ). 2. Press the TEST button ( ) for 3 seconds so that [Maintenance mode] appears on the screen ( ). After a while, [00] appears in the refrigerant address number display area.(at ) 3. Press the CHECK button ( ) for 3 seconds to switch to [Maintenance monitor].
12 DISASSEMBLY PROCEDURE PCA-RP71HA PCA-RP125HA PCA-RP71HA#1 PCA-RP125HA#1 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Removing the oil filter (1) Slide the oil filter towards you to remove. (See figure 1.) Figure 1 Oil filter e Slid 2. Removing the terminal block box cover (1) Remove the oil filter. (See figure 1.) (2) Remove a screw for terminal block box cover, and remove the terminal block box cover. (See photo 1.) Photo 1 Filter rail Terminal block box Screw 3.
OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 4. Removing the fan motor (1) Remove the oil filter. (See figure 1.) (2) Remove the control box cover. (See photo 2.) (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. (See photo 4.) (5) Remove the fan guard. (See photo 5.) (6) Remove the room temperature thermistor together with the holder at the right side of the casing.
OPERATING PROCEDURE PHOTOS 6. Removing the pipe temperature thermistor (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. (See photo 8.) (5) Remove the service panel. (See photo 9.) (6) Remove the pipe temperature thermistor from the holder. (See photo 10.
OPERATING PROCEDURE PHOTOS 9. Removing the guide vane (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 × 10) for guide vane, and remove the guide vane. (See photo 13.) Photo 13 Drain pan 10. Removing the vane (1) Slide the vane to the center of the unit, and pull it towards you to remove. (See photo 14.
13 PARTS LIST (non-RoHS compliant) STRUCTURAL PART PCA-RP71HA PCA-RP125HA 19 18 17 16 15 14 1 13 2 3 12 4 11 5 10 6 9 8 7 Q'ty / set No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Parts No.
20 FAN PARTS PCA-RP71HA PCA-RP125HA 18,19 17 16 15 14 1 2 3 4 5 13 4 6 6 12 8 11 7 8 10 9 Part numbers that are circled are not shown in the figure. Q'ty / set No. Parts No.
ELECTRICAL PARTS PCA-RP71HA PCA-RP125HA 7, 8 6 TEMP. ON/OFF 1 11 5 2 1 3 4 S1 S2 S3 TO OUTDOOR UNIT 9 1 2 TO REMOTE CONTROLLER 10 Q'ty / set No. Parts No. Parts Name Remarks (Drawing No.) PCA-RP Specifications 71HA 125HA Wiring Diagram Symbol 1 R01 18J 054 SUPPORT 9 9 2 T7W E41 310 CONTROLLER BOARD 1 1 I.B 3 R01 E02 239 FUSE 1 1 FUSE 4 R01 E02 313 POWER BOARD 1 1 P.B 5 R01 A00 255 RUN CAPACITOR 2.
14 RoHS PARTS LIST STRUCTURAL PART PCA-RP71/125HA PCA-RP71/125HA#1 19 18 17 16 15 14 1 13 2 3 12 4 11 5 10 6 9 8 No. RoHS 7 Q'ty / set Parts No.
20 FAN PARTS PCA-RP71/125HA PCA-RP71/125HA#1 18,19 17 16 15 14 1 2 3 4 5 13 4 6 6 12 8 11 7 8 10 9 No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 RoHS Part numbers that are circled are not shown in the figure. G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G Q'ty / set Parts No. Parts Name Specifications Remarks (Drawing No.
ELECTRICAL PARTS PCA-RP71/125HA PCA-RP71/125HA#1 7, 8 6 TEMP. ON/OFF 1 11 5 2 1 3 4 S1 S2 S3 TO OUTDOOR UNIT No. RoHS 9 Q'ty / set Parts No. Parts Name TO REMOTE CONTROLLER 10 71HA 71HA#1 125HA 125HA#1 1 G R01 20J 054 SUPPORT 2 2 Remarks (Drawing No.) PCA-RP Specifications 1 9 G T7W E51 310 CONTROLLER BOARD 9 1 250V 6.3A 4 G R01 E38 313 POWER BOARD 5 G R01 14N 255 RUN CAPACITOR 2.
Downloaded from AC-Manual.
TM HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in May 2008 No.OC329 REVISED EDITION-B PDF 7 Distributed in Jul. 2006 No.OC329 REVISED EDITION-A PDF 8 Distributed in Jun. 2005 No.OC329 PDF 9 Made in Japan. Downloaded from AC-Manual.com Manuals New publication, effective May 2008. Specifications subject to change without notice.
