SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS May 2008 No.OC330 REVISED EDITION-B SERVICE MANUAL Indoor unit [Model names] PKA-RP35GAL PKA-RP50GAL PKH-P35GALH PKH-P50GALH [Service Ref.] PKA-RP35GAL PKA-RP35GAL#1 PKA-RP50GAL PKA-RP50GAL#1 PKH-P35GALH PKH-P50GALH Revision : • PKA-RP35·50GAL#1 are added in REVISEDEDITION-B. • Some discriptions have been modified. • Please void OC330 REVISED EDITION-A. Note : • This manual describes only service data of the indoor units.
1 TECHNICAL CHANGES PKA-RP35GAL PKA-RP50GAL PKA-RP35GAL#1 PKA-RP50GAL#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 utilizing refrigerant R407C Do not use the existing refrigerant piping. Use liquid refrigerant to seal 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 utilizing 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. · Change flare nut to the one provided with this product. Use a newly flared pipe. · Avoid using thin pipes. If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.
Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Tool name Specifications ·Only for R410A 1 Gauge manifold ·Use the existing fitting specifications. (UNF1/2) ·Use high-tension side pressure of 5.3MPa·G or over. ·Only for R410A 2 Charge hose 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 Unit Filter Air intake grille Air intake Auto vane Guide vane Air outlet 7
Wireless remote controller When cover is open. CHECK TEST RUN display CHECK&TEST RUN display indicates that the unit is being checked or test-run. MODEL SELECT display Blinks when model is selected. display Lights up while transmission to the indoor unit is mode using switches. display SET TEMP. display temperature set. Displays the current time. TIMER display CHECK TEST RUN MODEL SELECT °C AMPM Displays when in timer operation or when setting timer.
INDOOR UNIT INDOOR UNIT 5 SPECIFICATIONS Service Ref. Mode Power supply(phase, cycle, voltage) Input kW Running current A Starting current A External finish Heat exchanger Fan Fan(drive) x No. Fan motor output kW Airflow(Low-Medium2-Medium1-High) */min(CFM) External static pressure Pa(mmAq) Operation control & Thermostat Noise level(Low-Medium2-Medium1-High) dB Unit drain pipe O.D. mm(in.) Dimensions mm(in.) W mm(in.) D mm(in.
Service Ref. Mode Power supply(phase, cycle,voltage) Input +1 kW Running current +1 A Starting current +1 A External finish Heat exchanger Fan Fan(drive) x No. Fan motor output kW Airflow(Low-Medium2-Medium1-High) */min(CFM) External static pressure Pa(mmAq) Booster heater +1 kW Operation control & Thermostat Noise level(Low-Medium2-Medium1-High) dB Unit drain pipe O.D. mm(in.) Dimensions W mm(in.) D mm(in.) H mm(in.) Weight kg(lbs) +1 : < > Shows the only booster heater rating. PKH-P35GALH Cooling 0.07 0.
NOISE CRITERION CURVES NOTCH SPL(dB) High 43 Medium1 41 38 Medium2 Low 36 PKA-RP35/50GAL PKA-RP35/50GAL#1 PKH-P35/50GALH LINE 90 80 OCTAVE BAND SOUND PRESSURE LEVEL, dB (0dB=0.
495 Model 35, 50 Knockout hole for left-rear piping Left-rear piping hole 49-:5hole for tapping screw Details of installation plate 300 360 Sleeve +1 :90 150 or more MITSUBISHI ELECTRIC Through hole :90~:100 R52.5 Liquid pipe Gas pipe 990 705Air outlet 80 715 Air intake 400 12-Louvers(manual) 340 Air intake 581 449 225 54 86 153 3/8F(:9.52) Knockout hole for right piping Refrigerant pipe.Drain pipe.
WIRING DIAGRAM 8 PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1 PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#1 P.B CNDK (RED) CN2S (WHT) MF 1 2 3 +1 (Fig.1) 1 2 TB4 YLW S1 S2 ORN S3 ORN BRN X4 BCR BLK WHT TO OUTDOOR UNIT POWER POWER 1 2 1 3 VANE CNDK 1 3 CND 1 3 CN6V INDOOR/OUTDOOR (GRN) (ORN) (RED) POWER CN2D(WHT) COMMUNICATION CN3C(BLU) ZNR X4 CN41 CN2L CN51 CN32 I.B 6 FUSE FAN 1 3 5 (WHT) YLW ORN I.
9 REFRIGERANT SYSTEM DIAGRAM PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1 PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#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 Strainer #50 14
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.
10-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. [Procedure] Refrigerant address display CHECK CHECK display Temperature button TEMP ON/OFF 1. Press the CHECK button twice. • "CHECK" lights, and refrigerant address "00" flashes.
• Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds OPERATION INDICATOR lamp flash pattern Beep Beep Beep Beep Off Beep 1st 2 nd 3 rd nth On On On On Beep Beep 1st Off On 2 nd · · · Repeated On 0.5 sec. Approx. 2.5 sec. 0.5 sec. 0.5 sec. Self-check Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
• On wireless remote controller The continuous buzzer sounds from receiving section of indoor unit. Blink of operation lamp • On wired remote controller Check code displayed in the LCD. • If the unit cannot be operated properly after test run, refer to the following table to find the cause.
Note: Refer to the manual of outdoor unit for the details of display such as F, U, and other E. 10-3. SELF-DIAGNOSIS ACTION TABLE Error Code P1 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 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.
10-4. 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 Cause Countermeasure (2)LED2 on indoor controller board is blinking. • 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. EMERGENCY OPERATION 10-5-1. When wireless remote controller troubles or its battery is exhausted 1. Emergency operation is available in such a case using emergency operation switch equipped next to the receiver of indoor unit. 2. To start operation • Cooling Operation·······Press (Cooling) switch. • Heating Operation·······Press (Heating) switch. wWhen the unit starts operating, the power lamp is lit.
10-6. HOW TO CHECK THE PARTS PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1 PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#1 Parts name Check points Room temperature thermistor (TH1) Pipe temperature thermistor (TH2) Condenser/evaporator temperature thermistor (TH5) Disconnect the connector then measure the resistance with a tester. (Surrounding temperature 10 ~30 ) Fan motor Measure the resistance between the terminals with a tester.
10-7. TEST POINT DIAGRAM 10-7-1. Indoor controller board PKA-RP35GAL PKA-RP35GAL#1 PKA-RP50GAL PKA-RP50GAL#1 CN3C Transmission (Indoor/ outdoor) (0~24V DC) CN2D Connect to the indoor power board (CN2S) (12.5~13.7V DC) PKH-P35GALH PKH-P50GALH LED1 Power supply (I.B) LED2 Power supply (R.B) LED3 Transmission (Indoor/ outdoor) CN22 Connect to the terminal block(TB5) (Remote controller connecting wire) (10.4~14.
10-7-2. Indoor power board PKA-RP35GAL PKA-RP35GAL#1 PKA-RP50GAL PKA-RP50GAL#1 PKH-P35GALH PKH-P50GALH CN2S Connect to the indoor controller board (CN2D) Between 1 to 3 12.6-13.
10-8. 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.
SPECIAL FUNCTION 11 11-1. ROTATION FUNCTION(AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) For PKA-RP35GAL#1, PKA-RP50GAL#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.
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 PKA-RP35GAL PKA-RP35GAL#1 PKA-RP50GAL PKA-RP50GAL#1 OPERATION PROCEDURE PKH-P35GALH PKH-P50GALH PHOTOS & ILLUSTRATION 1. REMOVE THE LOWER SIDE OF THE INDOOR UNIT FROM THE INSTALLATION PLATE. (1) Remove the left / right corner box of the indoor unit. (2) Hold and pull down the lower and both ends of the indoor unit, and remove the ▼ section from the square hole. (Refer to the figure 2.1) Or remove the front panel and push the ▼ section down by using hexagonal wrench ,etc.
OPERATION PROCEDURE PHOTOS & ILLUSTRATION 4. REMOVING THE POWER BOARD (1) Remove the front panel.(see the photo 1) (2) Remove the electrical parts box(2screws).(see the photo 2) (3) Disconnect the whole connector in the control board. (4) After lifting the controller case with pressing it’s convex section, remove the controller case and the control board simultaneously.(see the photo 3) (5) Disconnect the connector in the power board. (6) Remove the power board. (Photo 4) 5.
OPERATION PROCEDURE PHOTOS & ILLUSTRATION 9. REMOVING THE FAN MOTOR. (1) Remove the terminal block cover. (2) Disconnect the connector of the wireless remote controller board. (3) Remove the front panel.(see the photo 1) (4) Remove the electrical parts box.(see the photo 8) (5) Remove the nozzle assemble.(see the photo 7) (6) Remove the fan motor leg fixing 3screws. (7) Unscrew the set screws using by alankey and remove it by sliding the fan motor to right.
OPERATION PROCEDURE PHOTOS & ILLUSTRATION 13. REMOVING the SIGNAL RECEIVING P.C. BOARD (1) Remove the terminal block cover. (2) Disconnect the connector for the wireless remote controller. (3) Remove the front panel.(see the photo 1) (4) Remove the 2screws and signal receiving p.c. board cover. (5) Remove the signal receiving p.c. board. (Photo 14) Front panel Set screws Signal receiving p.c. board cover (Photo 15) Front panel Signal receiving p.c.
13 PARTS LIST (non-RoHS compliant) STRUCTURAL PARTS PKH-P35GALH, PKA-RP35GAL PKH-P50GALH, PKA-RP50GAL 1 2 4 3 12 5 6 11 13 8 7 9 PKH- PKARP35 / RP50 GAL 1 R01 07Y 808 BACK PLATE 2 R01 09Y 658 CORNER COVER 3 R01 07Y 623 UNDER COVER 1 1 1 1 1 1 4 R01 89Y 651 FRONT PANEL 5 R01 07Y 096 SCREW CAP 6 R01 07Y 092 VANE SLEEVE 1 1 3 3 1 1 7 R01 07Y 691 FRONT GRILLE 8 R01 A16 500 AIR FILTER 9 R01 07Y 002 AUTO VANE 10 R01 24K 658 RECEIVING UNIT 1 1 2 2 1 1 1 1 11 R01 07Y 658 CORNER C
ELECTRICAL PARTS PKH-P35GALH, PKA-RP35GAL PKH-P50GALH, PKA-RP50GAL 37 1 4 3 36 35 2 5 34 6 32 33 7 9 24 15 10 19 20 21 13 Parts No. 23 16 12 2 25 30 11 1 26 31 29 17 10 No. 28 1 8 27 Parts Name 14 22 18 Specifications R01 E48 480 HEAT EXCHANGER PKHP35 / P50 GALH PKARP35 / RP50 GAL Wiring RecomRemarks Diagram mended (Drawing No.
From the preceding page. Part numbers that is circled is not shown in the figure. No. Parts No. 18 — Specifications Parts Name PKHP35 / P50 GALH TERMINAL COVER 1 19 T7W A14 716 TERMINAL BLOCK PKA- Remarks 1 (BG02V195H10) Wiring Recom- RP35 / RP50 (Drawing No.) Diagram mended Symbol Q'ty GAL 3P(L, N, ) 1 20 T7W E23 716 TERMINAL BLOCK 3P(S1, S2, S3) 1 1 TB4 21 R01 588 255 CAPACITOR 2.0 ×440V 1 1 C 1 1 I.
14 RoHS PARTS LIST ELECTRICAL PARTS PKH-P35GALH, PKA-RP35GAL, PKA-RP35GAL#1 PKH-P50GALH, PKA-RP50GAL, PKA-RP50GAL#1 37 1 4 3 36 35 2 5 34 6 32 33 7 9 Parts No. 23 15 10 19 20 21 13 RoHS 24 16 12 2 25 30 11 1 26 31 29 17 10 No. 28 1 8 27 Parts Name 14 22 18 Specifications G R01 E70 480 HEAT EXCHANGER PKHP35 / P50 GALH PKA- Remarks Wiring Recom- RP35 / RP50 (Drawing No.
From the preceding page. No. RoHS Part number that is circled is not shown in the figure. 18 G Parts No. — Parts Name PKHPKAWiring RecomRemarks Diagram mended Specifications P35/P50 RP35/RP50 RP35/RP50 (Drawing No.) Symbol Q'ty GALH GAL GAL#1 TERMINAL COVER 19 G T7W E23 716 TERMINAL BLOCK 1 3P(L, N, ;) 1 1 (BG02V195H10) 1 TB2 20 G R01 E20 246 TERMINAL BLOCK 3P(S1, S2,S3) 1 1 1 TB4 21 G R01 E13 255 CAPACITOR 2.
STRUCTURAL PARTS PKH-P35GALH, PKA-RP35GAL, PKA-RP35GAL#1 PKH-P50GALH, PKA-RP50GAL, PKA-RP50GAL#1 1 2 4 3 12 5 6 11 13 8 No. RoHS 7 9 Parts Name PKA- Wiring RecomRemarks Diagram mended Specifications P35/P50 RP35/RP50 RP35/RP50 (Drawing No.
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.OC330 REVISED EDITION-B PDF 7 Distributed in Jun. 2006 No.OC330 REVISED EDITION-A PDF 8 Distributed in Apr. 2005 No.OC330 PDF 9 Made in Japan. New publication, effective May 2008 Specifications subject to change without notice.
