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Mitsubishi Electric MSZ-FS18NA-U1 User Manual

Mitsubishi Electric MSZ-FS18NA-U1
38 pages
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INDOOR UNIT
SERVICE MANUAL
INDOOR UNIT
Models
MSZ-FS06NA
-
U1
MSZ-FS09NA
-
U1
MSZ-FS12NA
-
U1
MSZ-FS15NA
-
U1
MSZ-FS18NA
-
U1
No. OBH872
PARTS CATALOG (OBB872)
Outdoor unit service manual
MUZ-FS∙NA(H) Series (OBH873)
MXZ-C∙NA,NAHZ Series (OBH702)
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ·········································5
4. OUTLINES AND DIMENSIONS ·····················6
5. WIRING DIAGRAM ·····································7
6. REFRIGERANT SYSTEM DIAGRAM ·············8
7. SERVICE FUNCTIONS ································9
8. MICROPROCESSOR CONTROL ················· 11
9. TROUBLESHOOTING ······························· 20
10. DISASSEMBLY INSTRUCTIONS ·················33
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Mitsubishi Electric MSZ-FS18NA-U1 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMSZ-FS18NA-U1
CategoryAir Conditioner
LanguageEnglish

Summary

Service Functions

Microprocessor Control

Wireless Remote Controller Overview

Explains the functions and buttons of the wireless remote controller.

Setting the Weekly Timer

Step-by-step guide to set weekly timer settings on the remote controller.

i-see Control Mode

Explains i-see control mode for temperature regulation based on sensible temperature.

Emergency and Test Operation

Instructions for using the emergency operation switch for test runs or emergencies.

Troubleshooting

Troubleshooting Precautions

Provides essential precautions and checks before starting troubleshooting procedures.

Failure Mode Recall Function

Explains how to recall and check memorized failure details for diagnosis.

Indoor Unit Failure Mode Table

Lists indoor unit failures, symptoms, conditions, and remedies based on indicator lamp blinks.

Troubleshooting Instructions

Provides a flowchart for troubleshooting unit operation issues based on indicator lamp status.

Troubleshooting Check Table

A table detailing troubleshooting for abnormal points based on indicator lamp patterns.

Main Parts Trouble Criteria

Lists main parts and their resistance criteria for checking functionality with a tester.

Indoor Fan Motor Troubleshooting Flow

A troubleshooting flow chart for checking the indoor fan motor.

Remote Controller and PC Board Check

Guides on checking the remote controller and indoor electronic control P.C. board functionality.

Indoor PC Board and Fan Motor Check

Troubleshooting steps for indoor P.C. boards and the indoor fan motor.

Checking Miswiring and Serial Signal Error

Steps to diagnose and resolve miswiring and serial signal errors in the MUZ type.

Test Point Diagram and Voltage

Provides diagrams and voltage test points for various electronic boards.

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