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Mitsubishi Electric MSZ-WR24NA-U1 User Manual

Mitsubishi Electric MSZ-WR24NA-U1
40 pages
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Outdoor unit service manual
MUZ-WRNA Series (OBH819)
PARTS CATALOG (OBB818)
MSZ-WR24NA
INDOOR UNIT
SERVICE MANUAL
INDOOR UNIT
Models
MSZ-WR09NA
-
U1
,
U2
MSZ-WR12NA
-
U1
,
U2
MSZ-WR18NA
-
U1
MSZ-WR24NA
-
U1
CONTENTS
1. TECHNICAL CHANGES
· ·······························
2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································5
4. OUTLINES AND DIMENSIONS ·····················7
5. WIRING DIAGRAM ·····································8
6. REFRIGERANT SYSTEM DIAGRAM ···········10
7. SERVICE FUNCTIONS ······························11
8. MICROPROCESSOR CONTROL ················13
9. TROUBLESHOOTING ······························· 17
10. DISASSEMBLY INSTRUCTIONS ·················32
No. OBH818
REVISED EDITION-C
OBH818 REVISED EDITION-B is void.
Revision C:
• MSZ-WR09/12NA -
U2
have been added.
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Mitsubishi Electric MSZ-WR24NA-U1 Specifications

General IconGeneral
CategoryAir Conditioner
BrandMitsubishi Electric
ModelMSZ-WR24NA-U1
TypeSplit System
Cooling Capacity24000 BTU/h
Seasonal Energy Efficiency Ratio (SEER)20.5
RefrigerantR410A
HSPF (Heating)10.0
Operating Temperature (Cooling)14°F to 115°F
Power Supply208-230V, 60Hz

Summary

Technical Changes and Revisions

Indoor Unit Components and Accessories

Indoor Unit Part Identification

Identifies and describes the various parts of the indoor air conditioning unit.

Specifications and Operating Parameters

Model Performance Specifications

Details technical specifications like power, airflow, sound level, and dimensions for different models.

Wiring Diagrams

Indoor Unit Electrical Schematics

Illustrates the internal wiring schematic for indoor unit electronic components and connections.

Refrigerant System Diagram

Refrigerant Circuit and Thermistor Locations

Depicts the refrigerant flow path and the location of associated thermistors within the indoor unit.

Microprocessor Control and Operation

Wireless Remote Controller Functions

Explains the functions, buttons, and operation of the wireless remote controller.

Emergency and Test Operation Modes

Procedures for activating emergency or test operations using the unit's switch.

Troubleshooting and Diagnostics

General Troubleshooting Precautions

Important safety and preparatory steps before commencing any troubleshooting.

Failure Mode Recall Function Operation

Method for recalling and displaying memorized failure codes from the unit's memory.

Step-by-Step Troubleshooting Guide

A structured guide for diagnosing common unit malfunctions and issues.

Troubleshooting Check Table for Malfunctions

A table correlating indicator patterns with failure points and recommended remedies.

Checking for Miswiring and Serial Signal Errors

Guide to identifying and rectifying wiring errors and communication signal issues.

Test Point Diagram and Voltage Measurement

Illustrates test points and required voltage measurements for electronic board diagnostics.

Disassembly and Component Removal Instructions

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