Mitsubishi Electric PUHZ-RP125YHA2 User Manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. REFERENCE MANUAL··································2
2. SAFETY PRECAUTION··································3
3. FEATURES ·····················································7
4. SPECIFICATIONS···········································8
5. DATA ·····························································10
6. OUTLINES AND DIMENSIONS····················15
7. WIRING DIAGRAM·······································18
8. WIRING SPECIFICATIONS ··························21
9. REFRIGERANT SYSTEM DIAGRAM ··············26
10. TROUBLESHOOTING ··································29
11. FUNCTION SETTING····································86
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ············92
13. EASY MAINTENANCE FUNCTION············102
14. DISASSEMBLY PROCEDURE ···················107
15. PARTS LIST ················································129
16. RoHS PARTS LIST ·····································140
No.OC374
REVISED EDITION-A
R410A
July 2006
Outdoor unit
[model names]
PUHZ-RP35VHA2
PUHZ-RP50VHA2
PUHZ-RP60VHA2
PUHZ-RP71VHA2
PUHZ-RP100VHA2
PUHZ-RP125VHA2
PUHZ-RP140VHA2
PUHZ-RP100YHA2
PUHZ-RP125YHA2
PUHZ-RP140YHA2
[Service Ref.]
PUHZ-RP35VHA2
PUHZ-RP50VHA2
PUHZ-RP60VHA2
PUHZ-RP71VHA2
PUHZ-RP100VHA2
PUHZ-RP125VHA2
PUHZ-RP140VHA2
PUHZ-RP100YHA2
PUHZ-RP125YHA2
PUHZ-RP140YHA2
PUHZ-RP60VHA2
PUHZ-RP71VHA2
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:
• RoHS PARTS LIST is added.
• Some descriptions have been
modified.
• Please void OC374.
OC374A--1.qxp 06.7.26 5:07 PM Page 1

Mitsubishi Electric PUHZ-RP125YHA2 Specifications

General

Type	Heat Pump
Cooling Capacity	12.5 kW
Heating Capacity	14.0 kW
Refrigerant	R410A
Power Supply	380-415V, 50Hz

Summary

1 REFERENCE MANUAL

1-1. INDOOR UNIT SERVICE MANUAL

Lists indoor unit service manuals and their reference codes.

1-2. TECHNICAL DATA BOOK

Refers to a technical data book for further information.

2 SAFETY PRECAUTION

2-1. CAUTIONS RELATED TO NEW REFRIGERANT

Provides precautions for using R410A refrigerant and related procedures.

3 FEATURES

CHARGELESS SYSTEM

Describes the pre-charged refrigerant system for simplified installation.

REFRIGERANT LEAKAGE DETECTION FUNCTION

Explains the unit's capability to detect refrigerant leaks.

4 SPECIFICATIONS

6 OUTLINES AND DIMENSIONS

1. FOUNDATION BOLTS

Instructions for securely attaching the unit with foundation bolts.

2. PIPING-WIRING DIRECTION

Specifies the direction for piping and wiring connections.

3. ATTACHING THE CONDUIT

Guidance on attaching the conduit to the unit.

7 WIRING DIAGRAM

8 WIRING SPECIFICATIONS

8-1. FIELD ELECTRICAL WIRING

Details power wiring specifications for different models and systems.

8-3. INDOOR – OUTDOOR CONNECTING CABLE

Specifies requirements and limitations for indoor-outdoor connecting cables.

8-4. M-NET WIRING METHOD AND ADDRESS SETTINGS

Explains M-NET wiring, address settings, and regulations for noise prevention.

9 REFRIGERANT SYSTEM DIAGRAM

10 TROUBLESHOOTING

10-1. TROUBLESHOOTING

Provides a summary of error code displays and recommended service actions.

10-2. CHECK POINT UNDER TEST RUN

Lists checks to perform before starting a test run to ensure proper operation.

10-3. HOW TO PRECEED "SELF-DIAGNOSIS"

10-3-1. When a Problem Occurs During Operation

Explains how problems are displayed on the remote controller during operation.

10-3-2. Self-Diagnosis During Maintenance or Service

Details how to recall error code history for unit diagnosis during maintenance.

10-3-3. Remote Controller Diagnosis

10-3-4. Malfunction-diagnosis method by wireless remote controller

10-4. SELF-DIAGNOSIS ACTION TABLE

10-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches

Details the functions of various DIP switches and push switches on the control boards.

(2) Function of connectors and switches

Explains the roles of connectors and switches, including special functions.

Special function

Describes special functions like low-level sound priority and demand control.

11 FUNCTION SETTING

11-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER

Explains how to set various unit functions using the remote controller.

12 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

12-1. HOW TO "MONITOR THE OPERATION DATA"

Step-by-step guide on accessing and viewing operation data using the remote controller.

13 EASY MAINTENANCE FUNCTION

13-1. MAINTENANCE MODE OPERATION METHOD

Details how to enter and navigate the maintenance mode for checking unit data.

13-3 INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION

1. How to select the "Refrigerant Leakage Detection" mode

Instructions for selecting the refrigerant leakage detection mode on the remote controller.

2. How to start the initial learning

Steps to initiate the initial learning process for refrigerant leakage detection.

3. How to start "Judgment of refrigerant leakage " mode

Procedure to start the refrigerant leakage judgment mode for checking operation.

14 DISASSEMBLY PROCEDURE

1. Removing External Panels

Step-by-step instructions for removing the outer panels of the unit.

2. Removing the Fan Motor

Procedure for safely removing the fan motor assembly from the unit.

3. Removing the Electrical Parts Box

Steps to safely remove the electrical parts box containing control components.

4. Removing Thermistors

Procedure for removing outdoor thermistors.

5. Removing Valves and Coils

Instructions for removing solenoid valves, linear expansion valves, and bypass valves.

6. Removing Other Components

Covers removal of high pressure switch, reactor, and capacitor.

7. Removing Compressor and Power Receiver

Steps to remove the compressor motor and power receiver.

15 PARTS LIST (non-RoHS compliant)

STRUCTURAL PARTS

Lists structural components of the PUHZ-RP35VHA2 and PUHZ-RP50VHA2 outdoor units.

16 RoHS PARTS LIST

FUNCTIONAL PARTS

Lists functional components for PUHZ-RP35VHA2 and PUHZ-RP50VHA2 outdoor units, compliant with RoHS.