Mitsubishi Electric PUH-P125YHA User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES
.................................
3
2. REFERENCE MANUAL
..................................
4
3. SAFETY PRECAUTION
..................................
5
4. FEATURES
......................................................
8
5. SPECIFICATIONS
...........................................
9
6. DATA
.............................................................
11
7. OUTLINES AND DIMENSIONS
....................
15
8. WIRING DIAGRAM
.......................................
19
9. WIRING SPECIFICATIONS
..........................
23
10. REFRIGERANT SYSTEM DIAGRAM
...............
28
11. TROUBLESHOOTING
...................................
30
12. FUNCTION SETTING
....................................
66
13. DISASSEMBLY PROCEDURE
.....................
73
14. PARTS LIST
..................................................
82
15. RoHS PARTS LIST
.......................................
88
No.OC379
REVISED EDITION-F
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
R410A
April 2012
Outdoor unit
[Model names]
PU-P71VHA PUH-P71VHA
PU-P71YHA PUH-P71YHA
PU-P100VHA PUH-P100VHA
PU-P100YHA PUH-P100YHA
PU-P125YHA PUH-P125YHA
PU-P140YHA PUH-P140YHA
PU(H)-P71VHA(1).UK PU(H)-P71VHA#2.UK
PU(H)-P71YHA
(1).UK PU(H)-P71YHA#2.UK
PU(H)-P100VHA
(1).UK PU(H)-P100VHA#2.UK
PU(H)-P100YHA
(1).UK PU(H)-P100YHA#2.UK
Note:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products
have <G> mark on the spec
nameplate.
• For servicing of RoHS com-
pliant products, refer to the
RoHS Parts List.
Revision:
• PU(H)-P125/140YHAR4.UK
have been added in
REVISED EDITION-F.
• Some descriptions have
been modified.
• Please void OC379
REVISED EDITION-E.
[Service Ref.]
Service Ref. is on page 2.

Mitsubishi Electric PUH-P125YHA Specifications

General

Cooling Capacity	12.5 kW
Heating Capacity	14.0 kW
Refrigerant	R410A
Sound Pressure Level (Heating)	49 dB(A)
Series	YHA
Type	Heat Pump

Summary

1 TECHNICAL CHANGES

2 REFERENCE MANUAL

2-1. INDOOR UNIT’S SERVICE MANUAL

Lists service manuals for indoor units with their corresponding service reference numbers.

2-2. TECHNICAL DATA BOOK

Refers to the technical data book manual number OCS07.

3 SAFETY PRECAUTION

3-1. ALWAYS OBSERVE FOR SAFETY

Emphasizes disconnecting all supply circuits before accessing terminals for safety.

3-2. CAUTIONS RELATED TO NEW REFRIGERANT

Provides specific cautions for using refrigerant R410A, covering pipes, tools, and handling.

4 FEATURES

5 SPECIFICATIONS

6 DATA

6-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

Details the required refrigerant charge in kg based on piping length for various models.

6-2. COMPRESSOR TECHNICAL DATA

Provides technical data for compressors, including winding resistance at 20°C.

6-3. NOISE CRITERION CURVES

6-4. STANDARD OPERATION DATA

7 OUTLINES AND DIMENSIONS

1 FREE SPACE (Around the unit)

Specifies required clearance around the unit for proper operation and ventilation.

2 SERVICE SPACE

Details the dimensions of space needed for service access to the unit.

3 FOUNDATION BOLTS

Describes the requirements for securing the unit firmly with foundation bolts.

4 PIPING-WIRING DIRECTIONS

Explains that piping and wiring connections can be made from four directions: front, right, rear, and below.

8 WIRING DIAGRAM

9 WIRING SPECIFICATIONS

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

Provides specifications for power wiring, including wire size, circuit rating, and model matching.

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

9-3. INDOOR – OUTDOOR CONNECTING CABLE

9-4. M-NET WIRING METHOD

9-4-3. Regulations in address settings

9-4-1. M-NET address setting

Explains how to set M-NET addresses using rotary switches on the outdoor unit.

9-4-2. Refrigerant address setting

Details how to set refrigerant addresses using DIP switches on the outdoor controller board.

10 REFRIGERANT SYSTEM DIAGRAM

11 TROUBLESHOOTING

11-1. General Troubleshooting Steps

Summarizes actions for reoccurring and non-reoccurring inferior phenomena based on error code display.

11-3. Self-Diagnosis Procedures

Explains how to proceed with self-diagnosis, including remote controller and wireless methods.

11-4. Self-Diagnosis Action Table

Provides a table to look up error codes, their meanings, cases, and judgment/action steps.

12 FUNCTION SETTING

12-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER

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

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

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

13 DISASSEMBLY PROCEDURE

1. Removing the service panel and top panel

Instructions for removing the service panel and top panel of the unit.

2. Removing the fan motor (MF)

Steps to remove the fan motor, including disconnecting its connector.

3. Removing the electrical parts box

Guide to removing the electrical parts box and its internal components.

10. Removing the motor for compressor (MC)

Detailed procedure for removing the compressor motor, including refrigerant recovery.

14 PARTS LIST ( non-RoHS compliant )

15 RoHS PARTS LIST