Mitsubishi Electric PUHZ-W50VHA-BS User Manual

SERVICE MANUAL
AIR TO WATER HEAT PUMP
No. OCH439
REVISED EDITION-H
CONTENTS
1. TECHNICAL CHANGES
..................................
3
2. SAFETY PRECAUTION
...................................
4
3. SPECIFICATIONS
............................................
7
4. DATA
.............................................................
24
5. OUTLINES AND DIMENSIONS
.....................
27
6. WIRING DIAGRAM
........................................
30
7. WIRING SPECIFICATIONS
...........................
40
8. REFRIGERANT SYSTEM DIAGRAM
...............
41
9. TROUBLESHOOTING
...................................
43
10. DISASSEMBLY PROCEDURE
......................
82
August 2012
Note:
• This manual describes only service data of outdoor unit.
• RoHS compliant products have <G> mark on the spec name plate.
R410A
[Model name]
PUHZ-W50VHA
PUHZ-W85VHA
PUHZ-HW112YHA
PUHZ-HW112YHA2
PUHZ-HW140VHA
PUHZ-HW140YHA
PUHZ-HW140VHA2
PUHZ-HW140YHA2
PUHZ-W85VHA(R1)
PUHZ-W85VHA(R1)-BS
PARTS CATALOG (OCB439)
Revision:
• PUHZ-W50VHAR2(-BS),
PUHZ-HW112YHA2R3(-BS),
PUHZ-HW140YHA2R3(-BS)
and PUHZ-HW140VHA2R3(-BS)
have been added in REVISED
EDITION-H.
• Some descriptions have been
modified.
• Please void OCH439 REVISED
EDITION-G.
PUHZ-W50VHA-BS
PUHZ-W85VHA-BS
PUHZ-HW112YHA-BS
PUHZ-HW112YHA2-BS
PUHZ-HW140VHA-BS
PUHZ-HW140YHA-BS
PUHZ-HW140VHA2-BS
PUHZ-HW140YHA2-BS
[Service Ref.]
Refer to page 2.

Mitsubishi Electric PUHZ-W50VHA-BS Specifications

General

Brand	Mitsubishi Electric
Model	PUHZ-W50VHA-BS
Category	Heat Pump
Language	English

Summary

Technical Changes

Safety Precautions

Always Observe for Safety

General safety guidelines to follow before and during repair service.

Cautions Related to New Refrigerant

Precautions for units using R410A refrigerant and specific tools.

Specifications

Specifications

Detailed specifications for various models including operating conditions and dimensions.

Data

Noise Criterion Curves

Noise criterion curves showing sound pressure levels across frequency bands.

Outlines and Dimensions

Free Space Around the Unit

Recommended clearances around the unit for proper installation and service.

Service Space

Required space around the unit for service access and maintenance.

Foundation Bolts

Specifications for securing the unit firmly with foundation bolts.

Wiring Diagram

Refrigerant System Diagram

Troubleshooting

Troubleshooting

General approach to troubleshooting based on error code display and reoccurrence.

Check Point Under Test Run

Important checks to perform before initiating a test run after installation.

Disassembly Procedure

Removing the Service Panel and Top Panel

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

Removing the Fan Motor (MF1)

Step-by-step guide to remove the fan motor assembly from the unit.

Removing the Electrical Box

Procedure for removing the electrical parts box containing circuit boards.