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Mitsubishi Electric MSZ-WR NA Series User Manual

Mitsubishi Electric MSZ-WR NA Series
58 pages
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Models
MUZ-WR09NA
-
U1
MUZ-WR12NA
-
U1
MUZ-WR18NA
-
U1
MUZ-WR24NA
-
U1
HFC
utilized
R410A
MUZ-WR24NA
PARTS CATALOG (OBB819)
SERVICE MANUAL
No. OBH819
REVISED EDITION-A
Indoor unit service manual
MSZ-WR•NA Series (OBH818)
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································4
4. OUTLINES AND DIMENSIONS ·····················7
5. WIRING DIAGRAM ·····································9
6. REFRIGERANT SYSTEM DIAGRAM ··········· 11
7. DATA······················································ 14
8. ACTUATOR CONTROL ····························· 24
9. SERVICE FUNCTIONS ······························ 25
10. TROUBLESHOOTING ······························· 26
11. DISASSEMBLY INSTRUCTIONS ················· 50
OUTDOOR UNIT
OBH819 is void.
Revision A:
• 7. DATA has been corrected.
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Mitsubishi Electric MSZ-WR NA Series Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMSZ-WR NA Series
CategoryAir Conditioner
LanguageEnglish

Summary

OUTDOOR UNIT SERVICE MANUAL

Models

Lists the supported outdoor unit models: MUZ-WR09NA, MUZ-WR12NA, MUZ-WR18NA, MUZ-WR24NA.

1 TECHNICAL CHANGES

2 PART NAMES AND FUNCTIONS

External Components Illustration

Visual identification of the main external parts of the outdoor units.

3 SPECIFICATION

Model Specifications Overview

Key performance and technical data for all supported models.

4 OUTLINES AND DIMENSIONS

Dimensional Drawings and Clearances

Provides dimensions and required installation clearances for models.

5 WIRING DIAGRAM

Wiring Schematics by Model

Detailed electrical wiring diagrams for different outdoor unit models.

6 REFRIGERANT SYSTEM DIAGRAM

Refrigerant Flow Diagrams

Illustrates the refrigerant circuit for various models.

MAX. REFRIGERANT PIPING & HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE

Guidelines for calculating additional refrigerant charge based on piping length.

7 DATA

PERFORMANCE DATA: COOLING & HEATING

Detailed performance data for cooling and heating capacities.

7-2. PERFORMANCE CURVE Cooling

Cooling Capacity & Power Curves

Graphical representation of cooling capacity and power consumption.

7-3. CONDENSING PRESSURE Cooling

Condensing Pressure Charts

Charts showing condensing pressure under different conditions.

7-4. STANDARD OPERATION DATA

Standard Operating Parameters

Typical operational values for different models and modes.

7-5. CAPACITY & INPUT CORRECTION (INVERTER)

Inverter Frequency Corrections

How inverter frequency affects capacity and input power.

8 ACTUATOR CONTROL

Actuator Control Functions

Relationship between sensors and actuators for unit control.

9 SERVICE FUNCTIONS

Defrost & Pre-heat Settings

Configuration of defrost finish temperature and pre-heat control.

10 TROUBLESHOOTING

Troubleshooting Cautions & Failure Recall

Important safety precautions and procedures for recalling failure modes.

10-3. TROUBLESHOOTING CHECK TABLE

Troubleshooting Codes & Remedies

List of symptoms, LED indications, conditions, and remedies.

10-4. TROUBLE CRITERION OF MAIN PARTS

Component Resistance & Criteria

Methods for checking component resistance and normal criteria.

10-5. TROUBLESHOOTING FLOW

Inverter & Compressor Checks

Step-by-step troubleshooting for inverter and compressor issues.

10-6. TEST POINT DIAGRAM AND VOLTAGE

Inverter P.C. Board Diagrams

Diagrams showing test points and voltage measurements on the inverter P.C. board.

11 DISASSEMBLY INSTRUCTIONS

Disassembly Procedures (MUZ-WR09/12/18NA)

Steps for disassembling the outdoor unit for smaller models.

11-2. MUZ-WR24NA Disassembly

Cabinet Removal

Detailed steps for removing the cabinet of the MUZ-WR24NA model.

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