Table of Contents
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Outdoor unit
[Model Name]
PUZ-ZM200YKA
PUZ-ZM250YKA
[Service Ref.]
PUZ-ZM200YKA.UK
PUZ-ZM250YKA.UK
R32
CONTENTS
1. REFERENCE MANUAL ···························· 2
2. SAFETY PRECAUTION ···························· 2
3. FEATURES ·········································· 12
4. SPECIFICATIONS ································· 13
5. DATA ·················································· 14
6. OUTLINES AND DIMENSIONS ················ 17
7. WIRING DIAGRAM ································ 18
8. WIRING SPECIFICATIONS ····················· 19
9. REFRIGERANT SYSTEM DIAGRAM ·········· 24
10. TROUBLESHOOTING ·························· 26
11. FUNCTION SETTING ··························· 80
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ·91
13. EASY MAINTENANCE FUNCTION ········100
14. DISASSEMBLY PROCEDURE ··············103
PARTS CATALOG (OCB738)
March 2020
No. OCH738
Note:
• This manual describes service
data of the outdoor units only.
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Table of Contents
Troubleshooting
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Summarization of Contents
Safety Precautions
General Safety Observance
Emphasizes disconnecting power before access and following safety guidelines.
Refrigerant Handling and Service Cautions
Details precautions for R32 refrigerant, general service, and additional refrigerant charging.
R32 Specific Unit Cautions
Highlights specific cautions related to using R32 refrigerant in the unit.
Data
Refilling and Adjusting Refrigerant Charge
Details refrigerant refill and adjustment procedures based on piping length.
Compressor Technical Data and Noise Curves
Provides compressor technical data and noise criterion curves.
Standard Operation Data
Lists standard operating parameters for various modes.
Wiring Specifications
Electrical Wiring and Cable Requirements
Covers field electrical wiring, separate power supplies, and connecting cables.
M-NET Wiring and Address Settings
Explains M-NET wiring methods and address settings for units.
Troubleshooting
General Troubleshooting and Test Run Procedures
Covers initial troubleshooting, test run checks, and pre-test procedures.
Self-Diagnosis and Action Tables
Details self-diagnosis, remote controller checks, and action tables for error codes.
Problem-Specific Troubleshooting
Lists common problems, their causes, and troubleshooting steps.
Function Setting
Unit Function Settings via Remote Controller
Details setting unit functions using wired and wireless remote controllers.
Remote Controller Function Selection Overview
Explains general function selection options for remote controllers.
Monitoring Operation Data by Remote Controller
Monitoring Operation Data and Request Codes
Guides on monitoring data and using request codes with the remote controller.
Easy Maintenance Function
Smooth Maintenance Procedures
Explains the smooth maintenance feature for checking operation data and stabilizing performance.
Disassembly Procedure
Panel Removal Procedures
Details removal of service, top, front, and rear panels.
Thermistor and Sensor Removal
Guides the removal of various thermistors and the thermal protector.
Valve and Switch Component Removal
Explains removal of 4-way valve, LEV, and high pressure switch.
Major Component Removal
Details the removal of the compressor and power receiver.
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