Mitsubishi Electric PUHZ-HRP71VHA User Manual

SERVICE MANUAL
No.OCH425
REVISED EDITION-D
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
October 2011
PUHZ-HRP71VHA
PUHZ-HRP100VHA
PUHZ-HRP100YHA
PUHZ-HRP125YHA
Note:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
PARTS CATALOG (OCB425)
Outdoor unit
[Model names]
PUHZ-HRP71VHA
PUHZ-HRP100VHA
PUHZ-HRP100YHA
PUHZ-HRP125YHA
PUHZ-HRP71VHA2
PUHZ-HRP100VHA2
PUHZ-HRP100YHA2
PUHZ-HRP125YHA2
[Service Ref.]
PUHZ-HRP71VHA
PUHZ-HRP100VHA
PUHZ-HRP100YHA
PUHZ-HRP125YHA
PUHZ-HRP71VHA2
PUHZ-HRP71VHA2R1
PUHZ-HRP100VHA2
PUHZ-HRP100VHA2R1
PUHZ-HRP100VHA2R2
PUHZ-HRP100YHA2
PUHZ-HRP100YHA2R1
PUHZ-HRP125YHA2
PUHZ-HRP125YHA2R1
CONTENTS
1. TECHNICAL CHANGES ·······························2
2. REFERENCE MANUAL ································2
3. SAFETY PRECAUTION ·······························3
4. FEATURES ···················································7
5. SPECIFICATIONS ········································8
6. DATA ·····························································9
7. OUTLINES AND DIMENSIONS··················12
8. WIRING DIAGRAM ·····································14
9. WIRING SPECIFICATIONS ························20
10. REFRIGERANT SYSTEM DIAGRAM ········25
11. TROUBLESHOOTING ································27
12. FUNCTION SETTING ·································85
13. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ····92
14. EASY MAINTENANCE FUNCTION ·········102
15. DISASSEMBLY PROCEDURE ·················107
Revision:
• "11-10 FUNCTION OF
SWITCHES, CONNECTORS
AND JUMPERS" has been
modified in REVISED
EDITION-D. (See page 80)
• Some descriptions have been
modified.
• Please void OCH425
REVISED EDITION-C.

Mitsubishi Electric PUHZ-HRP71VHA Specifications

General

Brand	Mitsubishi Electric
Model	PUHZ-HRP71VHA
Category	Air Conditioner
Language	English

Summary

3 SAFETY PRECAUTION

3-1. ALWAYS OBSERVE FOR SAFETY

General safety rules to follow before and during repair service.

3-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A, including handling and usage.

8 WIRING DIAGRAM

9 WIRING SPECIFICATIONS

9-1. FIELD ELECTRICAL WIRING (power wiring specifications)

Electrical wiring specifications for outdoor units and connection types.

9-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

Information on separate power supply patterns for indoor and outdoor units.

9-3. INDOOR – OUTDOOR CONNECTING CABLE

Specifications for indoor-outdoor connecting cables, including length and wire size.

9-4. M-NET WIRING METHOD

9-4-1. M-NET address setting

9-4-2. Refrigerant address setting

9-4-3. Regulations in address settings

10 REFRIGERANT SYSTEM DIAGRAM

11 TROUBLESHOOTING

11-1. TROUBLESHOOTING

Summary of actions for recurring and non-recurring troubles based on error codes.

11-2. CHECK POINT UNDER TEST RUN

Pre-test run checks, including electrical safety and switch settings.

11-3. HOW TO PROCEED “SELF-DIAGNOSIS”

Procedure for accessing and interpreting self-diagnosis results via the remote controller.

11-3-1. When a Problem Occurs During Operation

How problems are displayed and how to clear error codes during operation.

11-3-2. Self-Diagnosis During Maintenance or Service

Recalling and checking error code history during maintenance.

11-3-3. Remote Controller Diagnosis

Diagnosing the remote controller itself for malfunctions or communication issues.

11-3-4. Malfunction-diagnosis method by wireless remote controller

Method for diagnosing malfunctions using the wireless remote controller.

11-4. SELF-DIAGNOSIS ACTION TABLE

Table detailing error codes, abnormal points, and corresponding judgment/actions.

11-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

Troubleshooting common issues like remote controller not working or incorrect displays.

12 FUNCTION SETTING

12-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER

12-1-1. Selecting functions using the wired remote controller

12-1-2. Selecting functions using the wireless remote controller (Type C)

12-2. FUNCTION SELECTION OF REMOTE CONTROLLER

13 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

13-1. HOW TO "MONITOR THE OPERATION DATA"

13-2. REQUEST CODE LIST

13-2-1. Detail Contents in Request Code

14 EASY MAINTENANCE FUNCTION

14-1. MAINTENANCE MODE OPERATION METHOD

Method to enter and use the maintenance mode for checking unit data.

14-2. GUIDE FOR OPERATION CONDITION

Guide for checking operation conditions and using graphs for judgment.

14-3. INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION

Initial settings required to enable refrigerant leakage detection functionality.

15 DISASSEMBLY PROCEDURE

1. Removing the service panel and top panel

2. Removing the fan motor (MF1, MF2)

3. Removing the electrical parts box

4. Disassembling the electrical parts box

5. Removing the thermistor <Outdoor 2-phase pipe> (TH6) and thermistor <Outdoor> (TH7)

6. Removing the thermistor <Discharge> (TH4)

7. Removing the thermistor <Outdoor pipe> (TH3) (TH32) (TH33)

8. Removing the 4-way valve coil (21S4), and linear expansion valve coil (LEV-A, LEV-B, LEV-C)

9. Removing the 4-way valve

10. Removing linear expansion valve

11. Removing the high pressure switch (63H) and the low pressure switch (63L)

12. Removing bypass valve coil (SV) and bypass valve

13. Removing the pressure sensor (63HS) (HRP100/125YHA2)

14. Removing the reactors (ACL1, ACL2, ACL3)

15. Removing the compressor (MC)

16. Removing the power receiver