Mitsubishi Electric PUZ-A18NKA7 User Manual

1
SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL ································· 2
2. SAFETY PRECAUTION ································· 2
3. FEATURES ····················································· 7
4. SPECIFICATIONS ·········································· 8
5. DATA ····························································· 10
6. OUTLINES AND DIMENSIONS ··················· 14
7. WIRING DIAGRAM ······································ 17
8. WIRING SPECIFICATIONS ·························· 20
9. REFRIGERANT SYSTEM DIAGRAM ············· 21
10. TROUBLESHOOTING ·································· 24
11. EASY MAINTENANCE FUNCTION·············· 84
12. FUNCTION SETTING ··································· 87
13. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ·····95
14. DISASSEMBLY PROCEDURE ··················· 104
R410A
Outdoor unit
[Model Name]
PUZ-A12NKA7
PUZ-A18NKA7
PUZ-A24NHA7
PUZ-A30NHA7
PUZ-A36NKA7
PUZ-A42NKA7
PUZ-A12NKA7-BS
PUZ-A18NKA7-BS
PUZ-A24NHA7-BS
PUZ-A30NHA7-BS
PUZ-A36NKA7-BS
PUZ-A42NKA7-BS
PUY-A12NKA7
PUY-A18NKA7
PUY-A24NHA7
PUY-A30NHA7
PUY-A36NKA7
PUY-A42NKA7
PUY-A12NKA7-BS
PUY-A18NKA7-BS
PUY-A24NHA7-BS
PUY-A30NHA7-BS
PUY-A36NKA7-BS
PUY-A42NKA7-BS
[Service Ref.]
PUZ-A12NKA7
PUZ-A18NKA7
PUZ-A24NHA7
PUZ-A30NHA7
PUZ-A36NKA7
PUZ-A42NKA7
PUZ-A12NKA7-BS
PUZ-A18NKA7-BS
PUZ-A24NHA7-BS
PUZ-A30NHA7-BS
PUZ-A36NKA7-BS
PUZ-A42NKA7-BS
PUY-A12NKA7
PUY-A18NKA7
PUY-A24NHA7
PUY-A30NHA7
PUY-A36NKA7
PUY-A42NKA7
PUY-A12NKA7-BS
PUY-A18NKA7-BS
PUY-A24NHA7-BS
PUY-A30NHA7-BS
PUY-A36NKA7-BS
PUY-A42NKA7-BS
PUZ-A12/18NKA7
PUY-A12/18NKA7
PARTS CATALOG (OCB636)
Notes:
•Thismanualdescribesservice
dataoftheoutdoorunitsonly.
• RoHScompliantproductshave
<G> markonthespecname
plate.
SPLIT-TYPE,HEATPUMPAIRCONDITIONERS
SPLIT-TYPE,AIRCONDITIONERS
February 2017
No. OCH636
REVISED EDITION-A
Revision:
•
CorrectedtheSHFvaluein
"5-4.STANDARDOPERATION
DATA"inREVISEDEDITION-A.
• Somedescriptionshavebeen
modified.
• OCH636 isvoid.

Mitsubishi Electric PUZ-A18NKA7 Specifications

General

Brand	Mitsubishi Electric
Model	PUZ-A18NKA7
Category	Air Conditioner
Language	English

Summary

Safety Precaution

General Safety Guidelines

Essential safety guidelines to follow before and during repair services.

New Refrigerant Handling Cautions

Guidelines for using R410A, including piping, tools, and handling.

Refrigerant Piping Work Safety

Cautions and tool requirements for R410A refrigerant piping work.

Specifications

Standard Operation Data (Heat Pump Models)

Standard Operation Data (Cooling Only Models)

Wiring Diagram

Wiring Specifications

Refrigerant System Diagram

Troubleshooting

Troubleshooting Summary and Initial Checks

Guidance on handling recurring vs. non-recurring issues and pre-test run checks.

Test Run Procedures

Self-Diagnosis and Controller Checks

How to access self-diagnosis codes and perform remote controller checks.

Self-Diagnosis Action Table

Table detailing check codes, abnormal points, and recommended actions.

Problem Resolution Guide

Guidance on resolving issues like compressor overcurrent, sensor errors, and low pressure.

Component Checking Procedures

Emergency Operation Procedures

Steps and cautions for operating the unit in emergency mode.

Test Point Diagrams

Outdoor Unit Inspection Display Codes

Function Setting

Monitoring Operation Data

Request Code List for Operation Data

Disassembly Procedure

Outdoor Unit Component Removal Steps

Step-by-step instructions for disassembling outdoor unit components like panels, motors, and valves.