Service manual

ManualsBrandsMitsubishi ManualsAir ConditionerPUHZ-RP60VHA

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

CONTENTS

1. TECHNICAL CHANGES·································3

2. REFERENCE MANUAL··································4

3. SAFETY PRECAUTION··································5

4. FEATURES ·····················································9

5. SPECIFICATIONS·········································10

6. DATA ·····························································13

7. OUTLINES AND DIMENSIONS····················20

8. WIRING DIAGRAM·······································25

9. WIRING SPECIFICATIONS ··························32

10.

REFRIGERANT SYSTEM DIAGRAM

··············37

11. TROUBLESHOOTING···································40

12. FUNCTION SETTING··································107

13.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

······114

14. EASY MAINTENANCE FUNCTION············124

15. DISASSEMBLY PROCEDURE ···················129

16. PARTS LIST ················································151

17. RoHS PARTS LIST ·····································162

No.OC374

REVISED EDITION-C

R410A

February 2008

Outdoor unit

[model names]

PUHZ-RP35VHA2 PUHZ-RP35VHA3

PUHZ-RP50VHA2 PUHZ-RP50VHA3

PUHZ-RP60VHA2 PUHZ-RP60VHA3

PUHZ-RP71VHA2 PUHZ-RP71VHA3

PUHZ-RP100VHA2 PUHZ-RP100VHA3

PUHZ-RP125VHA2

PUHZ-RP140VHA2

PUHZ-RP100YHA2 PUHZ-RP100YHA3

PUHZ-RP125YHA2

PUHZ-RP140YHA2

[Service Ref.]

Service Ref. is on page 2.

PUHZ-RP60VHA2 PUHZ-RP60VHA2

PUHZ-RP71VHA2 PUHZ-RP71VHA2

PUHZ-RP60VHA3 PUHZ-RP71VHA3

NOTE:

• This manual describes only

service data of the outdoor

units.

• RoHS compliant products have

<G> mark on the spec name

plate.

• For servicing of RoHS compli-

ant products, refer to the RoHS

PARTS LIST.

Revision:

• PUHZ-RP35/50/60/71/100VHA3

and PUHZ-RP100YHA3 are

added in REVISED EDITION-

• Some descriptions have been

modified.

• Please void OC374 REVISED

EDITION-B.

OC374C--1.qxp 08.2.22 8:18 AM Page 1

Summary of content (178 pages)

PAGE 1
OC374C--1.qxp 08.2.22 8:18 AM Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS February 2008 No.OC374 REVISED EDITION-C SERVICE MANUAL R410A Outdoor unit [model names] PUHZ-RP35VHA2 PUHZ-RP50VHA2 PUHZ-RP60VHA2 PUHZ-RP71VHA2 PUHZ-RP100VHA2 PUHZ-RP125VHA2 PUHZ-RP140VHA2 PUHZ-RP100YHA2 PUHZ-RP125YHA2 PUHZ-RP140YHA2 Revision: • PUHZ-RP35/50/60/71/100VHA3 and PUHZ-RP100YHA3 are added in REVISED EDITIONC. • Some descriptions have been modified.
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OC374C--1.qxp 08.2.22 8:18 AM Page 2 [Service Ref.
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OC374C--1.qxp 1 08.2.22 8:18 AM Page 3 TECHNICAL CHANGES PUHZ-RP35/50VHA21 PUHZ-RP35/50VHA3 · Muffler has been changed. · Compressor (MC) has been changed. · Controller circuit board(C.B.) and power circuit board(P.B.) have been changed. PUHZ-RP60/71VHA21 · · · · PUHZ-RP60/71VHA3 Compressor (MC) and oil(type and amount) have been changed. Refigerant circiuit has been changed. Ball valve(Gas) Stop valve Controller circuit board(C.B.) has been changed.
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OC374C--1.qxp 2 08.2.22 8:18 AM Page 4 REFERENCE MANUAL 2-1. INDOOR UNIT SERVICE MANUAL Model name Service Ref. PLA-RP35/50/60/71/100/125/140BA PLA-RP71/100/125BA2 PLA-RP35/50/60/71/100/125/140BA.UK PLA-RP71/100/125BA2.UK Service Manual No. OCH412 OCB412 PLA-RP35/50/60/71AA.UK OC335 PLA-RP35/50/60/71AA OC327 PLA-RP35/50/60/71AA PLA-RP100/125/140AA2 PLA-RP100/125/140AA2.
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OC374C--1.qxp 08.2.22 8:18 AM 3 Page 5 SAFETY PRECAUTION 3-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to termnal, all supply ciucuits must disconnected. 3-2. 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. · For RP60/71VHA3 and RP100/125/140, be sure to perform replacement operation before test run.
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OC374C--1.qxp 08.2.22 8:18 AM Page 6 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 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.
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OC374C--1.qxp 08.2.22 8:18 AM Page 7 3-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES (1) Flowchart Measure the existing pipe thickness and check for damage. The existing pipe thickness meets specifications and the pipes are not damaged. The existing pipe thickness does not meet specifications or the pipes are damaged. Check if existing air conditioner can operate. Existing air conditioner can operate. Existing air conditioner cannot operate.
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OC374C--1.qxp 08.2.22 8:18 AM Page 8 (2) 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 time higher than that of R22, their sizes of flared sections and flare nuts are different.
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OC374C--1.qxp 08.2.22 8:18 AM 4 Page 9 FEATURES PUHZ-RP35/ 50VHA2 PUHZ-RP35/ 50VHA21 PUHZ-RP35/ 50VHA3 PUHZ-RP60/ 71VHA2 PUHZ-RP60/ 71VHA21 PUHZ-RP60/ 71VHA3 PUHZ-RP100/ 125/ 140VHA2 PUHZ-RP100/ 125/ 140VHA21 PUHZ-RP100/ 125/ 140YHA2 PUHZ-RP100/ 125/ 140YHA21 PUHZ-RP100VHA3 PUHZ-RP100YHA3 CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. Max.
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OC374C--1.qxp 5 08.2.22 8:18 AM Page 10 SPECIFICATIONS PUHZ-RP35VHA2(1) / VHA3 Cooling OUTDOOR UNIT Service Ref. Mode Power supply (phase, cycle, voltage) Running current Max. current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices Crankcase heater Heat exchanger Fan Fan(drive) o No. Fan motor output Airflow Defrost method Noise level REFRIGERANT PIPING Dimensions Weight Refrigerant Charge Oil (Model) Pipe size O.D.
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OC374C--1.qxp 08.2.22 8:18 AM Page 11 PUHZ-RP100VHA2 Service Ref. OUTDOOR UNIT Mode Power supply (phase, cycle, voltage) Running current Max. current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices Crankcase heater Heat exchanger Fan Fan(drive) o No. Fan motor output Airflow Defrost method Noise level Dimensions REFRIGERANT PIPING Between the indoor & outdoor unit Cooling Heating W D H ANV33FDDMT 1.
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OC374C--1.qxp 08.2.22 8:18 AM Page 12 PUHZ-RP100VHA21 / VHA3 Service Ref. OUTDOOR UNIT Mode Power supply (phase, cycle, voltage) Running current Max. current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices Crankcase heater Heat exchanger Fan Fan(drive) o No. Fan motor output Airflow Defrost method Noise level Dimensions kW REFRIGERANT PIPING Between the indoor & outdoor unit Cooling Heating W D H dB dB mm(in.) mm(in.) mm(in.
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OC374C--1.qxp 08.2.22 8:18 AM 6 Page 13 DATA 6-1. REFILLING REFRIGERANT CHARGE (R410A : kg) Service Ref. PUHZ-RP35VHA2(1) PUHZ-RP35VHA3 PUHZ-RP50VHA2(1) PUHZ-RP50VHA3 PUHZ-RP60VHA2(1) PUHZ-RP60VHA3 PUHZ-RP71VHA2(1) PUHZ-RP71VHA3 PUHZ-RP100VHA2(1) PUHZ-RP100VHA3 PUHZ-RP100YHA2(1) PUHZ-RP100YHA3 PUHZ-RP125VHA2 PUHZ-RP125VHA21 PUHZ-RP125YHA2 PUHZ-RP125YHA21 PUHZ-RP140VHA2 PUHZ-RP140VHA21 PUHZ-RP140YHA2 PUHZ-RP140YHA21 10m 20m Piping length (one way) 30m 40m 50m 2.1 2.3 2.5 2.7 2.1 2.3 2.5 3.
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OC374C--1.qxp 08.2.22 8:18 AM Page 14 6-3. NOISE CRITERION CURVES MICROPHONE 1m UNIT 1.5m GROUND 90 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 10 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 63 NC-20 125 250 500 1000 2000 4000 BAND CENTER FREQUENCIES, Hz PUHZ-RP100VHA2(1) PUHZ-RP100VHA3 PUHZ-RP100YHA2(1) PUHZ-RP100YHA3 OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.
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OC374C--1.qxp 08.2.22 8:18 AM Page 15 6-4. STANDARD OPERATION DATA PLA-RP35AA Representative matching Electrical circuit Total Mode Refrigerant circuit PLA-RP60AA PLA-RP71AA Cooling Heating Cooling Heating Cooling Heating Cooling Heating Capacity W 3,600 4,100 5,000 6,000 6,000 7,000 7,100 8,000 Input kW 1.07 1.12 1.55 1.62 1.65 1.85 1.97 2.
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OC374C--1.qxp 08.2.22 8:18 AM Page 16 PLA-RP100AA2 Representative matching Electrical circuit Total Mode Refrigerant circuit PLA-RP140AA2 Cooling Heating Cooling Heating Cooling Heating Capacity W 10,000 11,200 12,500 14,000 14,000 16,000 Input kW 3.02 3.02 3.87 3.88 4.65 4.69 Indoor unit PLA-RP100AA2 PLA-RP125AA2 PLA-RP140AA2 Phase , Hz 1 , 50 1 , 50 1 , 50 Voltage V 230 230 230 Current A 0.92 0.92 0.
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OC374C--1.qxp 08.2.22 8:18 AM Page 17 PLA-RP100AA2 Representative matching Electrical circuit Total Mode Refrigerant circuit PLA-RP140AA2 Cooling Heating Cooling Heating Cooling Heating Capacity W 10,000 11,200 12,500 14,000 14,000 16,000 Input kW 3.02 3.02 3.87 3.88 4.65 4.69 Indoor unit PLA-RP100AA2 PLA-RP125AA2 PLA-RP140AA2 Phase , Hz 1 , 50 1 , 50 1 , 50 Voltage V 230 230 230 Current A 0.92 0.92 0.
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OC374C--1.qxp 08.2.22 8:18 AM Page 18 PLA-RP35BA Representative matching Electrical circuit Total Mode Refrigerant circuit PLA-RP60BA PLA-RP71BA2 Cooling Heating Cooling Heating Cooling Heating Cooling Heating Capacity W 3,600 4,100 5,000 6,000 6,000 7,000 7,100 8,000 Input kW 1.07 1.12 1.55 1.62 1.65 1.85 1.94 1.90 Indoor unit PLA-RP35BA PLA-RP50BA PLA-RP60BA PLA-RP71BA2 Phase , Hz 1 , 50 1 , 50 1 , 50 1 , 50 Voltage V 230 230 230 230 Current A 0.
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OC374C--1.qxp 08.2.22 8:18 AM Page 19 PLA-RP100BA2 Representative matching Electrical circuit Total Mode Cooling Heating Cooling Heating Capacity W 10,000 11,200 10,000 11,200 Input kW 2.44 2.54 2.50 2.60 Indoor unit PLA-RP100BA2 PLA-RP100BA2 Phase , Hz 1 , 50 1 , 50 Voltage V 230 230 Current A 1.00 0.
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OC374C--1.qxp 08.2.22 8:18 AM 7 Page 20 OUTLINES AND DIMENSIONS Unit : mm PUHZ-RP35/50VHA2(1) PUHZ-RP35/50VHA3 400 [33 drain hole 347.5 330 300 Air intake [33 drain hole 365 155 152 43.6 Air intake 45.4 40 18 23 32.5 4-10 o 21 oval hole (M10 foundation bolt) Service panel Service panel for charge plug Air discharge Handle for moving 150 43 Connection for gas pipe 90 10 155 300 35 600 Connection for liquid pipe 183 69 287.
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er er 50 0m FREE Ov mm 0m 10 10 er er Ov m 1 • • Refrigerant GAS pipe connection (FLARE)[15.88 (5/8 inch) 2 • • Refrigerant LIQUID pipe connection (FLARE)[ 9.52 (3/8 inch) w1• • Indication of STOP VALVE connection location. m mm 10 08.2.22 8:18 AM Ov Ov OC374C--1.
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er 0m m Ov 0m mm 10 10 er er Ov m Example of Notes 50 mm FREE Front piping hole (Knockout) Front trunking hole (Knockout) 92 {92 40 65 45 19 92 75 55 65 45 Power supply wiring hole (2-{27Knockout) Right trunking hole (Knockout) 40 {92 Right piping hole (Knockout) 63 23 27 92 73 Power supply wiring hole (2-{27Knockout) Piping Knockout Hole Details 55 27 Air Intake Handle for moving w 1 ···Indication of STOP VALVE connection location.
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r m m 0m 1 0m 0 10 er Ov 15 0 1 0m er er Ov m mm 10 Service space Over 500 Over Front piping hole (Knockout) 92 [92 Front trunking hole 40 (Knockout) 65 45 Power supply wiring hole (2-[27Knockout) 19 92 75 Right piping hole (Knockout) Piping Knockout Hole Details 55 [92 Air intake Handle for moving w1 • • • Indication of STOP VALVE connection location. 150 Dimensions of space needed for service access are shown in the below diagram.
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er 1 0m m er 15 0 1 0m er m 10 Service space Over Example of Notes Ov Ov mm 500 Over Front piping hole (Knockout) 92 {92 65 Power supply wiring hole (2-{27Knockout) Front trunking hole 40 45 (Knockout) 19 92 75 Right piping hole (Knockout) Piping Knockout Hole Details 55 {92 Air intake Handle for moving w 1 ···Indication of STOP VALVE connection location. 150 Dimensions of space needed for service access are shown in the below diagram.
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OC374C--1.qxp 08.2.22 8:18 AM 8 Page 25 WIRING DIAGRAM PUHZ-RP35VHA2 PUHZ-RP50VHA2 PUHZ-RP60VHA2 PUHZ-RP71VHA2 Symbols used in wiring diagram above are, SYMBOL TB1 MC MF1 21S4 63H SV TH3, TH33 TH4 TH6 TH7 TH8 LEV(A),LEV(B) ACL P.B.
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OC374C--1.qxp 08.2.
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OC374C--1.qxp 08.2.22 8:18 AM Page 27 PUHZ-RP35VHA3 PUHZ-RP50VHA3 PUHZ-RP60VHA3 PUHZ-RP71VHA3 SYMBOL TB1 MC MF1 21S4 63H SV TH3, TH33 TH4 TH6 TH7 TH8 LEV-A, LEV-B ACL P.B.
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OC374C--1.qxp 08.2.
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OC374C--1.qxp 08.2.22 8:18 AM Page 29 PUHZ-RP100VHA21 PUHZ-RP125VHA21 PUHZ-RP140VHA21 PUHZ-RP100VHA3 SYMBOL TB1 MC MF1, MF2 21S4 63H SV TH3, TH33 TH4 TH6 TH7 TH8 LEV-A, LEV-B DCL ACTM CB P.B.
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OC374C--1.qxp 08.2.22 8:18 AM Page 30 PUHZ-RP100YHA2 PUHZ-RP125YHA2 PUHZ-RP140YHA2 SYMBOL TB1 TB2 MC MF1,MF2 21S4 SV 63H TH3 TH4 TH6 TH7 TH33 LEV ACL1~ACL4 CB1,CB2 CK RS P.B.
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OC374C--2.qxp 08.2.22 8:16 AM Page 31 PUHZ-RP100YHA21 PUHZ-RP125YHA21 PUHZ-RP140YHA21 PUHZ-RP100YHA3 SYMBOL TB1 TB2 MC MF1, MF2 21S4 63H SV TH3, TH33 TH4 TH6 TH7 LEV-A, LEV-B ACL1~ACL4 CB1, CB2 CK RS P.B.
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OC374C--2.qxp 9 08.2.22 8:16 AM Page 32 WIRING SPECIFICATIONS 9-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model Outdoor unit power supply RP35, 50V ~/N (single), 50 Hz, 230 V *1 Circuit rating Wiring Wire No.
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OC374C--2.qxp 08.2.22 8:16 AM Page 33 9-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES The following connection patterns are available. The outdoor unit power supply patterns vary on models.
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OC374C--2.qxp 08.2.22 8:16 AM Page 34 9-3. INDOOR – OUTDOOR CONNECTING CABLE The cable shall not be lighter than design 60245 IEC or 60227 IEC. Wire No. o Size (E) Outdoor power supply Indoor unit-Outdoor unit Indoor unit-Outdoor unit earth Max. 45m Max. 50m Max. 80m 3 o 1.5 (polar) 3 o 2.5 (polar) 3 o 2.5 (polar) and S3 separated 1 o Min. 1.5 1 o Min. 2.5 1 o Min. 2.5 w The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.
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OC374C--2.qxp 08.2.22 8:16 AM Page 35 9-4. M-NET WIRING METHOD (Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube. (2) Terminal block (TB7) for transmission wires should never be connected to 220~240V power supply. If it is connected, electronic parts on M-NET P.C.
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OC374C--2.qxp 08.2.22 8:16 AM Page 36 ● M-NET wiring (1) Use 2-core x 1.25mm2 shield wire for electric wires. M-NET terminal (Excluding the case connecting to system controller.) Ground block wire (2) Connect the wire to the M-NET terminal block.Connect one core of the transmission wire (non-polar) to A terminal and the other to B. Peel the A B S shield wire, twist the shield part to a string and connect it to S terminal.
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OC374C--2.qxp 08.2.
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OC374C--2.qxp 08.2.22 8:16 AM Page 38 PUHZ-RP60VHA3 PUHZ-RP71VHA3 unit : mm(inch) Heat exchanger Refrigerant GAS pipe connection [15.
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OC374C--2.qxp 08.2.22 8:16 AM Page 39 10-1. Refrigerant recovering (pump down) Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit. 1Turn on the power supply (circuit breaker). wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally.
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OC374C--2.qxp 11 08.2.22 8:16 AM Page 40 TROUBLESHOOTING 11-1. TROUBLESHOOTING Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.
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OC374C--2.qxp 08.2.22 8:16 AM Page 41 "TEST RUN" and the currently selected operation mode are displayed altemately. Displays the remaining test run time. Operating procedures 1. Turn on the main power supply. While the room temperature display on the remote controller is “PLEASE WAIT”, the remote controller is disabled. Wait until “PLEASE WAIT” disappears before using remote controller. “PLEASE WAIT” appears for about 2 minutes after power supply is turned on. w1 2. Press A TEST button twice.
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OC374C--2.qxp 08.2.22 8:16 AM Page 42 Test run [for wireless remote controller] TEST RUN TEMP ON/OFF 7 FAN AUTO STOP VANE AUTO START 5 MODE 6 3,4 CHECK LOUVER min TEST RUN 2 SET h RESET Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M". 1 Turn on the main power to the unit. TEST RUN 2 Press the button twice continuously.
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OC374C--2.qxp 08.2.22 8:16 AM Page 43 11-3. HOW TO PROCEED "SELF-DIAGNOSIS" 11-3-1. When a Problem Occurs During Operation If a problem occurs in the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display. [CHECK] and the refrigerant address are displayed on the temperature display, and the error code and unit number are displayed alternately as shown below. I F 1 (If the outdoor unit is malfunctioning, the unit number will be "00".
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OC374C--2.qxp 08.2.22 8:16 AM Page 44 D Press the ON/OFF button twice within 3 seconds. The self-diagnosis address or refrigerant address will blink. When the error history is reset, the display will look like the one shown below. However, if you fail to reset the error history, the error content will be displayed again. 5 Cancel self-diagnosis. Self-diagnosis can be cancelled by the following 2 methods. H Press the CHECK 5 Press the button twice within 3 seconds. ON/OFF button.
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OC374C--2.qxp 08.2.22 8:16 AM Page 45 11-3-4. Malfunction-diagnosis method by wireless 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] 1. Press the CHECK button twice. • "CHECK" lights, and refrigerant address "00" flashes.
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OC374C--2.qxp 08.2.22 8:16 AM Page 46 • 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.
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OC374C--2.qxp 08.2.22 8:16 AM Page 47 11-4. SELF-DIAGNOSIS ACTION TABLE Error Code None (Note 1) Refer to indoor unit section for code P and code E. Abnormal points and detection method — Case Judgment and action 1 No voltage is supplied to termi- 1 Check following items. nal block(TB1) of outdoor unit. a) Power supply breaker a) Power supply breaker is turned off. b) Connection of power supply terminal b) Contact failure or disconblock.
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OC374C--2.qxp Error Code EA (6844) Eb (6845) EC (6846) 08.2.22 8:16 AM Page 48 Abnormal points and detection method Case Judgment and action Miswiring of indoor/outdoor unit connecting wire 1. Outdoor controller circuit board can automatically check the number of connected indoor units. Abnormal if the number cannot be checked automatically due to miswiring of indoor/outdoor unit connecting wire and etc. after power is turned on for 4 minutes. 2.
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OC374C--2.qxp 08.2.22 8:16 AM Page 49 Error Code Abnormal points and detection method High pressure (High-pressure switch 63H worked) Abnormal if high-pressure switch 63H worked ( w ) during compressor operation. w 4.15 MPa 63H: High-pressure switch U1 (1302) High discharging temperature (1) Abnormal if discharge temperature thermistor (TH4) exceeds 125: or 110: continuously for 5 minutes.
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OC374C--2.qxp Error Code U3 (5104) 08.2.22 8:16 AM Page 50 Abnormal points and detection method Open/short circuit of discharge temperature thermistor (TH4) Abnormal if open (3: or less) or short (217: or more) is detected during compressor operation. (Detection is inoperative for 10 minutes of compressor starting process and for 10 minutes after and during defrosting.) Open/short of outdoor unit thermistors (TH3, TH6, TH7, and TH8) Abnormal if open or short is detected during compressor operation.
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OC374C--2.qxp 08.2.22 8:16 AM Error Code U8 (4400) Page 51 Abnormal points and detection method Outdoor fan motor 1 Failure in the operation of Abnormal if rotational frequency of the fan the DC fan motor motor is not detected during DC fan motor 2 Failure in the outdoor circuit operation. controller board Fan motor rotational frequency is abnormal if; • 100 rpm or below detected continuously for 15 seconds at 20: or more outside air temperature.
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OC374C--2.qxp Error Code UH (5300) UL (1300) 08.2.22 8:16 AM Page 52 Abnormal points and detection method Case Judgment and action Current sensor error 1 Disconnection of compressor 1 Correct the wiring (U•V•W phase) to compresAbnormal if current sensor detects –1.5A to sor. Refer to 11-9 (Outdoor power circuit wiring 1.5A during compressor operation. (This board). 2 Defective circuit of current senerror is ignored in case of test run mode.
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OC374C--2.qxp 08.2.22 8:16 AM Error Code E1 or E2 E3 or E5 Page 53 Abnormal points and detection method Remote controller control board 1 Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board. (Error code: E1) 2 Abnormal if the clock function of remote controller cannot be normally operated.
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OC374C--2.qxp Error Code P8 08.2.22 8:16 AM Page 54 Abnormal points and detection method Pipe temperature 1 Slight temperature difference between indoor room Detected as abnormal when the pipe temtemperature and pipe utes after compressor start and 6 minutes temperature thermistor after the liquid or condenser/evaporator pipe • Shortage of refrigerant is out of cooling range.
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OC374C--2.qxp 08.2.22 8:16 AM Page 55 Error Code Abnormal points and detection method Case Judgment and action A6 (6606) Communication error with communication processor Defective communication between unit processor and transmission processor Note) The address and attribute display at remote controller indicate the controller that detected abnormality. 1 Data of transmission processor or unit processor is not transmitted normally because of accidental trouble such as noise or thunder surge.
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OC374C--2.qxp 08.2.22 8:16 AM Page 56 From the previous page. Error Code Case Judgment and action 4. If displayed address or attribute is remote controller, indoor unit detects abnormality when indoor unit transmits signal to remote controller and there was no reply (ACK).
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OC374C--2.qxp 08.2.22 8:16 AM Error Code A8 (6608) Page 57 Abnormal points and detection method Case M-NET NO RESPONSE 1 Transmitting condition is Abnormal if a message was transmitted repeated fault because of and there were reply (ACK) that message noise and the like. was received, but response command 2 Extension of transmission wire does not return. Transmitting side detects voltage and signal is caused abnormality every 30 seconds, 6 times by over-range transmission continuously. wire.
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OC374C--2.qxp 08.2.22 8:16 AM Page 58 Factor Phenomena 4. Even controlling by the wireless 1The pair number settings of the wireless remote remote controller, no beep is heard controller and indoor controller board are misand the unit does not start operatmatched. ing. Operation display is indicated on wireless remote controller. Countermeasure 1Check the pair number settings. 5. When operating by the wireless remote controller, beep sound is heard, however, unit does not start operating.
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OC374C--2.qxp 08.2.22 8:16 AM Page 59 Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller. Diagnosis flow Cause Inspection method and troubleshooting Check the display time of “PLEASE WAIT” after turning on the main power. 6 minutes or more How long is “PLEASE WAIT” kept being displayed on the remote controller? 2 minutes or less 2 to 6 minutes Are any error codes displayed on the remote controller? Check the LED display of the outdoor controller circuit board.
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OC374C--2.qxp 08.2.22 8:16 AM Page 60 Symptoms: Nothing is displayed on the remote controller 1 Diagnosis flow Cause LED display of the indoor controller board LED1 : LED2 : LED3 : Inspection method and troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit. AC 198V to AC 264V? YES NO Check the voltage among L(L3) and N on the terminal block (TB1) of the outdoor power circuit board.
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OC374C--3.qxp 08.2.22 8:15 AM Page 61 Symptoms: Nothing is displayed on the remote controller 2 Diagnosis flow Cause LED display of the indoor controller board LED1 : LED2 : LED3 : or Inspection method and troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit. NO AC 198V to AC 264V? YES Not lighting. Check the status of the indoor controller board LED3 display.
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OC374C--3.qxp 08.2.22 8:15 AM Page 62 Symptoms: Nothing is displayed on the remote controller 3 Diagnosis flow Cause LED display of the indoor controller board LED1 : LED2 : or LED3 : — Inspection method and troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. DC 10V to DC 16V? YES • Defective remote controller • Replace the remote controller. NO Check the status of the LED2.
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OC374C--3.qxp 08.2.22 8:15 AM Page 63 • Before repair Frequent calling from customers Phone Calls From Customers How to Respond Unit does 1 The operating display of remote 1 Check if power is supplied to air conditioner. not operate controller does not come on. Nothing appears on the display unless power is at all. supplied. 2 Unit cannot be restarted for a while after it’s stopped. 2 Wait around 3 minutes to restart unit.
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OC374C--3.qxp 08.2.22 8:15 AM Page 64 Phone Calls From Customers How to Respond The room cannot be cooled or heated sufficiently. 1 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature. HEAT: When the set temperature is higher than the room temperature. Note 2 Check if filters are not dirty and clogged.
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OC374C--3.qxp 08.2.22 8:15 AM Page 65 Phone Calls From Customers Something 3 Air blows out for a while after is wrong HEAT operation is stopped. with the blower….. How to Respond Note However, this control is also 3 This is not a malfunction. The blower is operating just for cooling down the applied to the models which heated-up air conditioner. This will be done within has no electric heater. 1 minute. This control is conducted only when the HEAT operation is stopped with the electric heater ON.
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OC374C--3.qxp 08.2.22 8:15 AM Page 66 Phone Calls From Customers A white mist is expelled from the indoor unit. Water or moisture is expelled from the outdoor unit. How to Respond This is not a malfunction. This may occur when the operation gets started in the room of high humidity. Cooling; when pipes or piping joints are cooled, they get sweated and water drips down. Heating; water drips down from the heat exchanger.
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OC374C--3.qxp 08.2.22 8:15 AM Page 67 11-6. HOW TO CHECK THE PARTS PUHZ-RP35/50/60/71/100VHA2(1) PUHZ-RP100/125/140YHA2(1) PUHZ-RP35/50/60/71/100VHA3 PUHZ-RP100YHA3 Check points Parts name Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10:~30:) Thermistor (TH4) Normal Abnormal Thermistor (TH6) TH4 160k"~410k" TH3 Thermistor (TH7) TH6 Open or short 4.3k"~9.
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OC374C--3.qxp 08.2.22 8:15 AM Page 68 Check method of DC fan motor (fan motor / outdoor controller circuit board) 1 Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Give attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor.) 2 Self check Symptom : The outdoor fan cannot turn around. Fuse check Check the fuse (F5) on outdoor controller board.
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OC374C--3.qxp 08.2.22 8:15 AM Page 69 11-7. HOW TO CHECK THE COMPONENTS 50 Low temperature thermistors (TH3) (TH6) (TH7) (TH33) 40 Resistance (k") • Thermistor • Thermistor • Thermistor • Thermistor Thermistor R0 = 15k' ± 3% B constant = 3480 ± 2% 1 1 Rt =15exp{3480( 273+t – 273 )} 0: 15k' 30: 4.3k' 10: 9.6k' 40: 3.0k' 20: 6.3k' 25: 5.
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OC374C--3.qxp 08.2.22 8:15 AM Page 70 Linear expansion valve (RP35-RP71) (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal.
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OC374C--3.qxp 08.2.22 8:15 AM Page 71 (RP100-RP140) Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal.
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OC374C--3.qxp 08.2.22 8:15 AM Page 72 (3) How to attach and detach the coil of linear expansion valve (RP35-RP71) Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Coil Lead wire Stopper Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward. Be sure to detach the coil holding main body firmly.
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OC374C--3.qxp 08.2.22 8:15 AM Page 73 (4) How to attach and detach the coil of linear expansion valve (RP100-RP140) Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Stopper Main body Coil Lead wire Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward. Be sure to detach the coil holding main body firmly.
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OC374C--3.qxp 08.2.22 8:15 AM Page 74 11-8. EMERGENCY OPERATION (1) When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency operation switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board. ●When following abnormalities occur, emergency operation will be available.
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OC374C--3.qxp 08.2.22 8:15 AM Page 75 (5) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values: Operation mode Operation data Remarks COOL HEAT Intake temperature (TH1) 27: 20.
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OC374C--3.qxp 08.2.22 8:15 AM Page 76 11-9. TEST POINT DIAGRAM TEST POINT1 is high voltage.
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OC374C--3.qxp 08.2.22 8:15 AM Page 77 Outdoor controller circuit board PUHZ-RP35/50/60/71/100VHA21 PUHZ-RP35/50/60/71/100VHA3 PUHZ-RP100/125/140YHA21 PUHZ-RP100YHA3 CN51 CNDM SW1 Forced defrost, detect history record reset, refrigerant address TEST POINT1 is high voltage.
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OC374C--3.qxp 08.2.22 8:15 AM Page 78 Outdoor noise filter circuit board PUHZ-RP35VHA2 PUHZ-RP50VHA2 LI, NI Voltage of 220-240V AC is input. (Connect to the terminal block(TB1)) EI Connect to the earth CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC)) CN5 Primary current (Connect to the outdoor power circuit board (CN5)) LO, NO Voltage of 220-240V AC is output.
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OC374C--3.qxp 08.2.22 8:15 AM Page 79 Outdoor noise filter circuit board PUHZ-RP35VHA21 PUHZ-RP35VHA3 PUHZ-RP50VHA21 PUHZ-RP50VHA3 LI, NI Voltage of 220-240V AC is input. (Connect to the terminal block(TB1)) EI Connect to the earth E2 Connect to the earth E3 Connect to the earth CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC)) CN5 Primary current (Connect to the outdoor power circuit board (CN5)) LO, NO Voltage of 220-240V AC is output.
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OC374C--3.qxp 08.2.22 8:15 AM Page 80 Outdoor noise filter circuit board PUHZ-RP60VHA2 PUHZ-RP71VHA2 EI Connect to the earth CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC)) CN5 Primary current (Connect to the outdoor power circuit board (CN5)) CN52C 52C relay signal (Connect to the outdoor controller circuit board (CN52C)) LO, NO Voltage of 220-240V AC is output. (Connect ACL) 80 LI, NI Voltage of 220-240V AC is input.
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OC374C--3.qxp 08.2.22 8:15 AM Page 81 Outdoor noise filter circuit board PUHZ-RP60VHA21 PUHZ-RP60VHA3 PUHZ-RP71VHA21 PUHZ-RP71VHA3 EI, E2 Connect to the earth E3 Connect to the earth CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC)) CN5 Primary current (Connect to the outdoor power circuit board (CN5)) CN52C 52C relay signal (Connect to the outdoor controller circuit board (CN52C)) LO, NO Voltage of 220-240V AC is output.
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OC374C--3.qxp 08.2.22 8:15 AM Page 83 Outdoor noise filter circuit board PUHZ-RP100VHA21 PUHZ-RP125VHA21 PUHZ-RP140VHA21 PUHZ-RP100VHA3 CN52C 52C driving signal (Connect to the outdoor controller circuit board (CN52C).
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OC374C--3.qxp 08.2.22 8:15 AM Page 86 Brief Check of DIP-IPM and DIP-PFC W Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. 1. Check of DIP-IPM P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W 2.
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OC374C--3.qxp 08.2.22 8:15 AM Page 87 Outdoor power circuit board PUHZ-RP35VHA21 PUHZ-RP50VHA21 PUHZ-RP60VHA21 PUHZ-RP71VHA21 PUHZ-RP35VHA3 PUHZ-RP50VHA3 PUHZ-RP60VHA3 PUHZ-RP71VHA3 Brief Check of DIP-IPM and DIP-PFC W Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. 1. Check of DIP-IPM P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W 2.
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OC374C--3.qxp 08.2.22 8:15 AM Page 88 Outdoor power circuit board PUHZ-RP100VHA2 PUHZ-RP100VHA21 PUHZ-RP125VHA2 PUHZ-RP125VHA21 PUHZ-RP140VHA2 PUHZ-RP140VHA21 PUHZ-RP100VHA3 CN2 Connect to the outdoor controller circuit board (CN2) 1-5:Transmitting signal to the outdoor controller circuit board (0~5V DC) 2-5:Zero cross signal (0~5V DC) 3,4:Not used 6-5:16V DC 7-5:16V DC Brief Check of POWER MODULE W Usually, they are in a state of being short-circuited if they are broken.
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OC374C--3.qxp 08.2.22 8:15 AM Page 89 Brief Check of POWER MODULE W Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. 1. Check of POWER MODULE 1.Check of DIODE circuit L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2.
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OC374C--4.qxp 08.2.22 8:14 AM Page 93 11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches Type of Switch No. switch 1 Forced defrost w1 2 Abnormal history clear 3 Dip switch SW1 Action by the switch operation Function OFF Start Normal When compressor is working in heating operation.
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OC374C--4.qxp 08.2.22 8:14 AM Page 94 PUHZ-RP35-140VHA21, PUHZ-RP100-140YHA21, PUHZ-RP35-100VHA3, PUHZ-RP100YHA3 Type of Switch Switch No.
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OC374C--4.qxp 08.2.22 8:14 AM Page 95 Special function (a) Low-level sound priority mode (Local wiring) Unit enters into Low-level sound priority mode by external signal input setting. Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual.
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OC374C--4.qxp 08.2.22 8:14 AM Page 96 The blinking patterns of both LED1(green) and LED2(red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on outdoor controller board.
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OC374C--4.qxp 08.2.22 8:14 AM Indication Outdoor controller board LED1 (Green) LED2 (Red) Page 97 Contents Error Error Inspection method code w1 U2 1Check if stop valves are open. 3 blinking 1 blinking Abnormality of shell thermostat 2Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller and discharging temperature (TH4) board are not disconnected. if unit is filled with specified amount of refrigerant.
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OC374C--4.qxp 08.2.22 8:14 AM Page 98 [When optional part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on ‘A-Control Service Tool’.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting ON Page 99 Pipe temperature / Liquid(TH3) – 40~90 1 2 3 4 5 6 Discharge temperature (TH4) 3~217 ON 1 2 3 4 5 6 ON Explanation for display Unit – 40~90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When -10:; 0.5 secs. 0.5secs. 2 secs. 10 : 3~217 (When the discharge thermistor detects 100: or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105:; 0.5 secs. 0.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting ON Page 100 Display detail Explanation for display Unit Pipe temperature / Liquid(TH3) on error occurring – 40~90 – 40~90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When –15:; 0.5 secs. 0.5secs. 2 secs.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting Page 101 Explanation for display Display detail The number of connected indoor units ON 0~3 (The number of connected indoor units are displayed.) Unit Unit 1 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting ON Page 102 Explanation for display Display detail Indoor setting temperature 17~30 17~30 Outdoor pipe temperature / 2-phase (TH6) -39~88 -39~88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.) Outdoor ambient temperature (TH7) -39~88 -39~88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting ON Page 103 Explanation for display Display detail 0~100 (When the capacity is 100% hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 100%; 0.5 secs. 0.5secs. 2 secs. 1 00 Capacity save 0~100 When air conditioner is connected to M-NET and capacity save mode is demanded, “0”~”100” is displayed. 1 2 3 4 5 6 Unit % When there is no setting of capacity save “100” is displayed.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting Page 104 Display detail Explanation for display LEV-A opening pulse on error occurring 0~480 0~480 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130 pulse; 0.5 secs. 0.5secs. 2 secs.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting Page 105 Display detail Explanation for display Unit Discharge superheat on error occurring SHd 0~255 0~255 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 150°C; 0.5 secs. 0.5secs. 2 secs. 1 50 : 0~130 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 115°C; 0.5 secs. 0.5secs. 2 secs.
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OC374C--4.qxp 08.2.22 8:14 AM SW2 setting Page 106 Explanation for display Display detail Controlling status of compressor operating frequency Unit The following code will be a help to know the operating status of unit. •The tens digit Display Compressor operating frequency control 1 Primary current control Secondary current control 2 •The ones digit (In this digit, the total number of ON 1 2 3 4 5 6 activated control is displayed.
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OC374C--4.qxp 08.2.22 8:14 AM 12 Page 107 FUNCTION SETTING 12-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set according to necessity using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. (1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.
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OC374C--4.qxp 08.2.22 8:14 AM Page 108 (2) Functions available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller) • When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the indoor unit number of Operating Procedure.
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OC374C--4.qxp 08.2.22 8:14 AM Page 109 12-1-1. Selecting functions using the wired remote controller First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room temperature detection position is given. For actual operations, refer to steps 1 to 0 .
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OC374C--4.qxp 08.2.22 8:14 AM Page 110 [Operating Procedure] 1 Check the setting items provided by function selection. If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps 2 to 7 , fill in the "Check" column in Table 1, then change them as necessary. For initial settings, refer to the indoor unit's installation manual. 2 Switch off the remote controller.
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OC374C--4.qxp 08.2.22 8:15 AM Page 111 12-1-2. Selecting functions using the wireless remote controller (Type C) Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] The flow of the function selection procedure is shown below.
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OC374C--4.qxp 08.2.22 8:15 AM Page 112 12-2. FUNCTION SELECTION OF REMOTE CONTROLLER The setting of the following remote controller functions can be changed using the remote controller function selection mode. Change the setting when needed. Item 2 Item 1 Language setting to display 1.Change Language ("CHANGE LANGUAGE") (1) Operation function limit setting (operation lock) ("LOCKING FUNCTION") 2.
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OC374C--4.qxp 08.2.22 8:15 AM Page 113 [Function selection flowchart] Setting language (English) Normal display (Display when the air conditioner is not running) Hold down the E button and press the D button for 2 seconds. Hold down the E button and press the D button for 2 seconds. Press the operation mode button. Press theTIMER MENU button. Press theTIMER ON/OFF button. Remote controller function selection mode Item 1 G Change Language Item 2 English Dot display G Germany F Spanish TEMP.
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OC374C--4.qxp 13 08.2.22 8:15 AM Page 114 MONITORING THE OPERATION DATABYTHE REMOTE CONTROLLER 13-1. HOW TO "MONITOR THE OPERATION DATA" • Turn on the [Monitoring the operation data] C Example) Request code "004" Discharge temperature 69; Refrigerant address "00" A D B (7) (3) (5) (1) (2) (6) (4) (1) Press the TEST A: Maintenance mode B: Refrigerant address C: Data display area D: Request code display area button for 3 seconds so that [ Maintenance mode] appears on the screen (at A ).
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OC374C--4.qxp 08.2.22 8:15 AM Page 115 13-2. REQUEST CODE LIST Request code * Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Description Request content (Display range) Unit 0 Operation state Refer to 13-2-1. Detail Contents in Request Code.
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08.2.22 8:15 AM Request code OC374C--4.qxp Page 116 Description Request content (Display range) Unit 50 Indoor unit-Control state Refer to 13-2-1.Detail Contents in Request Code. – 51 Outdoor unit-Control state Refer to 13-2-1.Detail Contents in Request Code. – 52 Compressor-Frequency control state Refer to 13-2-1.Detail Contents in Request Code. – 53 Outdoor unit-Fan control state Refer to 13-2-1.Detail Contents in Request Code. – 54 Actuator output state Refer to 13-2-1.
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08.2.22 8:15 AM Request code OC374C--4.qxp Page 117 Description Request content (Display range) Unit 103 Error history 1 (latest) Displays error history. (" - - " is displayed if no history is present.) Code 104 Error history 2 (second to last) Displays error history. (" - - " is displayed if no history is present.) Code 105 Error history 3 (third to last) Displays error history. (" - - " is displayed if no history is present.
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08.2.22 8:15 AM Request code OC374C--4.qxp Page 118 Description Request content (Display range) Unit Remarks 153 154 155 Indoor-Fan operating time (After filter is reset) Indoor-Total operating time (Fan motor ON time) 0 – 9999 1 hour 0 – 9999 10 hours 156 0 – 255 Fan control data – For indoor fan phase control "00 **" "**" indicates fan control data. – For indoor fan pulsation control "00 **" "**" indicates fan control data.
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OC374C--4.qxp 08.2.22 8:15 AM Page 119 13-2-1.
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OC374C--5.qxp 08.2.22 8:12 AM Page 123 [Indoor unit – Model setting information] (Request code : 162) Data display 0 Display 0 See the table on the right.
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OC374C--5.qxp 14 08.2.22 8:12 AM Page 124 EASY MAINTENANCE FUNCTION ● Reduces maintenance work drastically. ● Enables you to check operation data of the indoor and outdoor units by remote controller. Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models. Smooth Maintenance Function Discharge temperature 64: ● Conventional inspection work ●Outdoor unit ● ●Indoor unit ● Measure the intake air temperature.
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OC374C--5.qxp 08.2.22 8:12 AM Page 125 ● Data measurement When the operation is stabilized, measure operation data as explained below. (4) Press the [TEMP] buttons ( and ) to select the desired refrigerant address. [Screen B ] (5) Select the type of data to be displayed. After selecting, go to step (6).
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OC374C--5.qxp 08.2.22 8:12 AM Page 126 14-2. GUIDE FOR OPERATION CONDITION Check Points Retightened Outdoor Unit Good Retightened Indoor Unit Good Retightened (Insulation resistance) M" (Voltage) Com- CleanliTemperature ness Temperature Cleanliness Outdoor Unit pressor Indoor Unit V 1 Accumulated operating time Time 2 Number of ON/OFF times Times 3 Current Enter the temperature differences between 5 , 4 , 7 and 8 into the graph given below.
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OC374C--5.qxp 08.2.22 8:12 AM Page 127 14-3. INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION ■Remote controller button position A C B This air conditioner (Outdoor unit) can detect refrigerant leakage which may happen during a long period of use. In order to enable the leakage detection, the following settings are required to let the unit memorize the initial condition (initial refregerant amount).
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OC374C--5.qxp 08.2.22 8:12 AM Page 128 3. How to start "Judgment of refrigerant leakage " mode. To know the current condition of refrigerant amount, same operation must be performed. Please repeat the same procedure 1~3 as when "Initial learning operation" for "Checking operation". 4Press w CLOCK button and select the [GAS LEAK JUDGE] Refrigerant leakage detection (initial teaching) Refrigerant leakage detection judgment GAS LEAK TEST START 5Press FILTER GAS LEAK JUDGE ( ) button to confirm.
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OC374C--5.qxp 08.2.22 8:12 AM 15 Page 129 DISASSEMBLY PROCEDURE PUHZ-RP35, 50VHA2(1)/VHA3 OPERATING PROCEDURE PHOTOS 1. Removing the top panel, service panel, front panel and back panel (1) Remove the top panel fixing screws (4 ✕ 10), one from the right and two from the eft side, and detach the top panel. Photo 1 Top panel Back panel (2) Remove 1 service panel fixing screw (4 ✕ 10) and detach the service panel by pulling it downward. (See photo 2.
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OC374C--5.qxp 08.2.22 8:12 AM Page 130 OPERATING PROCEDURE PHOTOS 3. Removing the electrical parts box Photo 5 (1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Disconnect the indoor/outdoor connecting wire from terminal block.
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OC374C--5.qxp 08.2.22 8:12 AM Page 131 OPERATING PROCEDURE PHOTOS 5. Removing the thermistor (TH7) Photo 7 (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the electrical parts box. (See photo 4.) (5) Pull out the thermistor (TH7) from the sensor holder.
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OC374C--5.qxp 08.2.22 8:12 AM Page 132 OPERATING PROCEDURE PHOTOS 8. Removing the 4-way valve (1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Remove the back panel. (See photo 1.) (5) Remove the electrical parts box. (See photo 5.) (6) Remove the 4-way valve (See photo 8.) (7) Recover refrigerant. (8) Remove the welded part of 4-way valve. Note 1: Recover refrigerant without spreading it in the air.
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OC374C--5.qxp 08.2.22 8:12 AM Page 133 OPERATING PROCEDURE PHOTOS 12. Removing the compressor (MC) (1) Remove the service panel. (See photo 2.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) (4) Remove the back panel. (See photo 1.) (5) Remove the electrical parts box. (See photo 5.) (6) Remove 3 separator fixing screws (4 ✕ 10) and remove the separator. (7) Recover refrigerant. (8) Remove 3 compressor fixing nuts by using a spanner or a adjustable wrench.
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OC374C--5.qxp 08.2.22 8:12 AM Page 134 PUHZ-RP60,71VHA2(1)/VHA3 PHOTOS & ILLUSTRATION OPERATING PROCEDURE 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 ✕ 10) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top panel and remove it. Figure 1 Top panel fixing screws Top panel Slide Service panel Service panel fixing screws Fan grille Grille fixing screws 2.
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OC374C--5.qxp 08.2.22 8:12 AM Page 135 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor (TH6) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connectors, TH7/6 (red), on the controller circuit board in the electrical parts box. Photo 4 Controller circuit board (C.B.) Electrical parts box Thermistor (TH6) (4) Loosen the clamp for the lead wire in the rear of the electrical parts box.
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OC374C--5.qxp 08.2.22 8:13 AM Page 136 PHOTOS OPERATING PROCEDURE 7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A), LEV(B)) and bypass valve coil (SV) (1) Remove the service panel. (See figure 1) (2) Remove the top panel. (See figure 1) (3) Remove the electrical parts box. (See photo 4) [Removing the 4-way valve coil] (4) Remove 4-way valve coil fixing screw (M4 ✕ 6). (5) Remove the 4-way valve coil by sliding the coil toward you.
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OC374C--5.qxp 08.2.22 8:13 AM Page 137 OPERATING PROCEDURE PHOTOS 10. Removing the bypass valve (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 right side panel fixing screws (5 ✕ 10) in the rear of the unit and remove the right side panel. (5) Remove the bypass valve solenoid coil. (See photo 7.). (6) Recover refrigerant. (7) Remove the welded part of bypass valve.
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OC374C--5.qxp 08.2.22 8:13 AM Page 138 OPERATING PROCEDURE PHOTOS 13. Removing the compressor (MC) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and remove the front cover panel. (See photo 3.) (4) Remove 2 back cover panel fixing screws (5 ✕ 10) and remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.
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OC374C--5.qxp 08.2.22 8:13 AM Page 139 PUHZ-RP100, 125, 140VHA2(1) PUHZ-RP100VHA3 PHOTOS & ILLUSTRATION OPERATING PROCEDURE 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 ✕ 10) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top panel and remove it. Figure 1 Top panel fixing screws Top panel Service panel Slide Grille fixing screws Fan grille Grille fixing screws 2.
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OC374C--5.qxp 08.2.22 8:13 AM Page 140 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor (TH6) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connectors, TH7/6 (red), on the controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the electrical parts box. (5) Pull out the thermistor (TH6) from the sensor holder.
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OC374C--5.qxp 08.2.22 8:13 AM Page 141 PHOTOS OPERATING PROCEDURE 7. Removing the 4-way valve coil (21S4), and LEV coil (LEV(A), LEV(B)) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) Photo 7 4-way valve coil (21S4) [Removing the 4-way valve coil] (3) Remove 4-way valve coil fixing screw (M4 ✕ 6). (4) Remove the 4-way valve coil by sliding the coil toward you.
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OC374C--5.qxp 08.2.22 8:13 AM Page 142 OPERATING PROCEDURE PHOTOS 10. Removing the bypass valve coil (SV) and bypass valve (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 ✕ 10) in the rear of the unit and remove the right side panel. (4) Remove the bypass valve coil fixing screw (M4 ✕ 6). (5) Remove the bypass valve coil by sliding the coil upward.
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OC374C--5.qxp 08.2.22 8:13 AM Page 143 OPERATING PROCEDURE PHOTOS 13. Removing the compressor (MC) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and remove the front cover panel. (See photo 3.) (4) Remove 2 back cover panel fixing screws (5 ✕ 10) and remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.
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OC374C--5.qxp 08.2.22 8:13 AM Page 144 PUHZ-RP100/125/140YHA2(1) PUHZ-RP100YHA3 PHOTOS & ILLUSTRATION OPERATING PROCEDURE 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 ✕ 10) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top panel and remove it.
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OC374C--5.qxp 08.2.22 8:13 AM Page 145 From the previous page. PHOTOS & ILLUSTRATION OPERATING PROCEDURE (6) Remove the terminal cover and disconnect the compressor lead wire. (7) 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. Photo 4 Electrical parts box Electrical parts box fixing screw 4.
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OC374C--5.qxp 08.2.22 8:13 AM Page 146 PHOTOS OPERATING PROCEDURE 5. Removing the thermistor (TH6) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7/6 (red), on the controller circuit board in the electrical parts box. (4) Loosen the 2 wire clamps on top of the electrical parts box. (5) Pull out the thermistor (TH6) from the sensor holder.
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OC374C--5.qxp 08.2.22 8:13 AM Page 147 PHOTOS OPERATING PROCEDURE 8. Removing the 4-way valve coil (21S4), and LEV coil (LEV(A), LEV(B)) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) Photo 13 4-way valve coil (21S4) [Removing the 4-way valve coil] (3) Remove 4-way valve coil fixing screw (M4 ✕ 6). (4) Remove the 4-way valve coil by sliding the coil toward you.
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OC374C--5.qxp 08.2.22 8:13 AM Page 148 OPERATING PROCEDURE PHOTOS 11. Removing bypass valve coil (SV) and bypass valve (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 ✕ 10) in the rear of the unit and remove the right side panel. (4) Remove the bypass valve coil fixing screw (M4 ✕ 6). (5) Remove the bypass valve coil by sliding the coil upward.
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OC374C--5.qxp 08.2.22 8:13 AM Page 149 OPERATING PROCEDURE PHOTOS 13. Removing the reactors (ACL1, ACL2, ACL3) Photo 17 (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the 6 screws, screw 8 and 9 (5 ✕ 10), that fix the front panel and remove the front panel. (See photo 3.
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OC374C--5.qxp 08.2.22 8:13 AM Page 150 OPERATING PROCEDURE PHOTOS 14. Removing the compressor (MC) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and remove the front cover panel. (See photo 3.) (4) Remove 2 back cover panel fixing screws (5 ✕ 10) and remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.
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OC374C--6.qxp 08.2.22 8:11 AM 16 Page 151 PARTS LIST (non-RoHS compliant) STRUCTURAL PARTS PUHZ-RP35VHA2 PUHZ-RP50VHA2 10 9 8 7 6 13 12 1 11 2 3 4 5 , Q ty/set No. Part No.
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OC374C--6.qxp 08.2.22 8:11 AM STRUCTURAL PARTS PUHZ-RP60VHA2 PUHZ-RP71VHA2 Page 152 17 1 18 16 2 15 14 13 12 9 5 6 7 8 9 11 10 3 4 Q'ty/set No. Part No. 1 — 2 R01 E01 Part Name F.ST SCREW Specification (5✕10) PUHZ-RP60VHA2 PUHZ-RP71VHA2 31 662 SIDE PANEL (L) (DG12F536H10) 1 3 T7W E02 691 FAN GRILLE 1 4 T7W E01 667 FRONT PANEL 1 5 1 — Remarks (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 153 STRUCTURAL PARTS PUHZ-RP100VHA2 PUHZ-RP125VHA2 PUHZ-RP140VHA2 PUHZ-RP100YHA2 PUHZ-RP125YHA2 PUHZ-RP140YHA2 17 2 1 18 16 15 14 13 12 9 3 5 6 7 8 9 10 11 4 No. Part No. 1 — 2 T7W E02 3 T7W 4 T7W 5 — Part Name Specification (5✕10) , Q ty/set PUHZ-RP 100, 125, 140 VHA2 YHA2 38 38 662 SIDE PANEL (L) 1 1 E02 691 FAN GRILLE 2 2 E02 667 FRONT PANEL 1 1 F.
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OC374C--6.qxp 08.2.22 8:11 AM Page 155 Part numbers that are circled are not shown in the figure. , Q ty/set No. Part No. Part Name Specification PUHZ-RP35VHA2 PUHZ-RP50VHA2 1 R01 E40 221 FAN MOTOR 1 2 R01 E02 115 PROPELLER 1 3 R01 E04 097 NUT 1 4 R01 E09 467 MUFFLER Remarks (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 157 Part numbers that are circled are not shown in the figure. , Q ty/set No. Part Name Part No. Specification PUHZ-RP Remarks (Drawing No.) 60/71VHA2 EHDS81B86MS1 1 R01 E44 221 FAN MOTOR 2 R01 E01 115 PROPELLER 1 3 R01 E02 097 NUT 1 — 5 T7W E15 242 SOLENOID VALVE COIL 1 6 R01 E11 428 BYPASS VALVE 1 7 R01 E15 425 CAPILLARY TUBE [4.0 ✕ [2.4 ✕ 500mm 1 [2.5 ✕ [0.
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OC374C--6.qxp 08.2.22 8:11 AM Page 159 Part numbers that are circled are not shown in the figures. , Q ty/set No. Part No. Part Name Specification PUHZ-RP 100 125 140 Remarks (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 161 Part numbers that are circled are not shown in the figures. , Q ty/set No. Part No. Part Name Specification PUHZ-RP 100 125 140 Remarks (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 163 No. RoHS Part numbers that are circled are not shown in the figure. , Q ty/set Part No. Part Name Specification PUHZ-RP35,50 Remarks (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 165 No. RoHS Part numbers that are circled are not shown in the figure. , Q ty/set Part No. Part Name Specification PUHZ-RP60,71 VHA2 EHDS81B86MS1 VHA21 1 1 115 PROPELLER FAN 1 1 097 NUT 1 1 1 1 5 G T7W E15 242 SOLENOID VALVE COIL 1 1 6 G R01 E13 428 BYPASS VALVE 1 1 7 G R01 E24 425 CAPILLARY TUBE [4.0 ✕ [2.4 ✕ 500mm 1 1 8 G R01 E25 425 CAPILLARY TUBE [2.5 ✕ [0.
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OC374C--6.qxp 08.2.22 8:11 AM Page 167 No. RoHS Part numbers that are circled are not shown in the figure. Q'ty/set Part No. Part Name Specification PUHZ-RP60, 71 VHA3 1 G T7W E27 763 FAN MOTOR EHDS81B86MS1 MF1 1 2 G R01 E08 115 PROPELLER FAN 1 3 G R01 E09 097 NUT 1 4 G T7W E07 467 MUFFLER 1 5 G R01 E13 428 BYPASS VALVE 1 6 G R01 E14 201 THERMISTOR (DISCHARGE) SNB172FDGM1 Including RUBBER MOUNT Wiring RecomRemarks Diagram mended (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 169 No. RoHS Part numbers that are circled are not shown in the figures. Part No. Part Name Specification , Q ty/set PUHZ-RP 100 125 140 Remarks (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 171 No. RoHS Part numbers that are circled are not shown in the figure. Part No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 173 No. 1 RoHS Part numbers that are circled are not shown in the figures. G R01 G T7W Part No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 174 STRUCTURAL AND ELECTRICAL PARTS PUHZ-RP35VHA2 PUHZ-RP35VHA21 PUHZ-RP35VHA3 PUHZ-RP50VHA2 PUHZ-RP50VHA21 PUHZ-RP50VHA3 10 9 8 7 6 13 12 No. RoHS 1 11 2 3 4 5 , Q ty/set Part No. Part Name Specification PUHZ-RP35,50 1 VHA2 VHA2 VHA3 1 G R01 E30 691 GRILLE 1 1 2 G R01 E09 668 FRONT PANEL 1 1 3 G R01 E29 686 BASE ASSY 1 1 1 4 G 5 G R01 — SEPARATOR 1 E14 667 SERVICE PANEL 1 G T7W E12 668 SERVICE PANEL Remarks (Drawing No.
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OC374C--6.qxp 08.2.22 8:11 AM Page 175 STRUCTURAL PARTS PUHZ-RP60/71VHA2 PUHZ-RP60/71VHA21 PUHZ-RP60/71VHA3 17 1 18 16 2 15 14 13 12 9 5 6 7 8 9 11 10 4 No. RoHS 3 1 G Q'ty/set Part No. — Part Name F.
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OC374C--6.qxp 08.2.22 8:11 AM STRUCTURAL PARTS PUHZ-RP100VHA2 PUHZ-RP125VHA2 PUHZ-RP140VHA2 PUHZ-RP100YHA2 PUHZ-RP125YHA2 PUHZ-RP140YHA2 Page 176 17 2 1 18 16 15 14 13 12 9 3 5 6 7 8 9 10 11 4 No. RoHS , Q ty/set PUHZ-RP 100, 125, 140 VHA2 YHA2 1 G — 38 38 2 G T7W E03 662 SIDE PANEL (L) 1 1 3 G T7W E03 691 FAN GRILLE 2 2 4 G T7W E06 667 FRONT PANEL 1 1 5 Part No. G G — Part Name F.
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OC374C--6.qxp 08.2.22 8:11 AM Page 177 STRUCTURAL PARTS PUHZ-RP100VHA21 PUHZ-RP125VHA21 PUHZ-RP140VHA21 PUHZ-RP100YHA21 PUHZ-RP125YHA21 PUHZ-RP140YHA21 PUHZ-RP100VHA3 PUHZ-RP100YHA3 17 2 1 18 16 15 14 13 12 9 3 5 6 7 8 9 10 11 4 RoHS , Q ty/set Part No. 1 G — 2 G R01 E20 662 SIDE PANEL (L) 1 1 3 G T7W E03 691 FAN GRILLE 2 2 4 G T7W E06 667 FRONT PANEL 1 1 No. 5 G G — Part Name F.
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OC374C--6.qxp 08.2.22 8:11 AM Page 178 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Feb. 2008 No.OC374 REVISED EDITION-C PDF 8 Distributed in May 2007 No.OC374 REVISED EDITION-B PDF 9 Distributed in Jul. 2006 No.OC374 REVISED EDITION-A PDF 8 Distributed in Feb. 2006 No.OC374 PDF 9 Made in Japan New publication, effective Feb.