Mitsubishi Electric PUHZ-SW75YAA User Manual

SERVICE MANUAL
No. OCH651
R410A
May 2017
PARTS CATALOG (OCB651)
[Model Name]
PUHZ-SHW80VAA
PUHZ-SHW112VAA
PUHZ-SHW80YAA
PUHZ-SHW112YAA
PUHZ-SW75VAA
PUHZ-SW100VAA
PUHZ-SW75YAA
PUHZ-SW100YAA
Salt proof model
PUHZ-SHW80VAA-BS
PUHZ-SHW112VAA-BS
PUHZ-SHW80YAA-BS
PUHZ-SHW112YAA-BS
PUHZ-SW75VAA-BS
PUHZ-SW100VAA-BS
PUHZ-SW75YAA-BS
PUHZ-SW100YAA-BS
CONTENTS
1. REFERENCE MANUAL ································ 2
2. SAFETY PRECAUTION ······························· 3
3. SPECIFICATIONS ········································ 7
4. DATA ····························································· 9
5. OUTLINES AND DIMENSIONS·················· 11
6. WIRING DIAGRAM ····································· 12
7. WIRING SPECIFICATIONS ························ 16
8. REFRIGERANT SYSTEM DIAGRAM ········ 17
9. TROUBLESHOOTING ································ 20
10. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ···· 59
11. DISASSEMBLY PROCEDURE ··················· 65
Note:
• This manual describes
service data of the outdoor
units only.
AIR TO WATER HEAT PUMP UNITS
[Service Ref.]
PUHZ-SHW80VAA.UK
PUHZ-SHW112VAA.UK
PUHZ-SHW80YAA.UK
PUHZ-SHW112YAA.UK
PUHZ-SW75VAA.UK
PUHZ-SW100VAA.UK
PUHZ-SW75YAA.UK
PUHZ-SW100YAA.UK
PUHZ-SHW80VAA-BS.UK
PUHZ-SHW112VAA-BS.UK
PUHZ-SHW80YAA-BS.UK
PUHZ-SHW112YAA-BS.UK
PUHZ-SW75VAA-BS.UK
PUHZ-SW100VAA-BS.UK
PUHZ-SW75YAA-BS.UK
PUHZ-SW100YAA-BS.UK

Mitsubishi Electric PUHZ-SW75YAA Specifications

General

Brand	Mitsubishi Electric
Model	PUHZ-SW75YAA
Category	Heat Pump
Language	English

Summary

Reference Manual

Air to Water System Models

Safety Precautions

General Service Safety

Essential safety rules before and during repair operations.

R410A Refrigerant & Piping Safety

Cautions for R410A refrigerant, piping, and specific model requirements.

Specifications

Outdoor Unit Technical Specifications

Data

Refrigerant & Compressor Data

Wiring Diagram

Outdoor Unit Electrical Schematics

Wiring Specifications

Field Electrical Wiring Specifications

Refrigerant System Diagram

Outdoor Unit Refrigerant Flow Paths

Troubleshooting

Self-Diagnosis Overview

Summary of check codes, conditions, and initial actions for troubleshooting.

Self-Diagnosis: Power On & Operating Issues

Action tables for abnormalities detected on power-on and during operation.

Component Checking Procedures

Component Checking: Fan Motor & Control Board

Step-by-step guide to check DC fan motor and related circuit board issues.

Disassembly Procedure

Removing Panels, Fan Motor & Electrical Boxes

Steps to remove external panels, fan motor, and electrical boxes for maintenance.

Disassembling Electrical Components

Procedures for removing various electrical components from the unit.

Removing Thermistors and Refrigerant Lines

Removing Valves, Sensors, and Compressor