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Mitsubishi Electric MSZ-FT25VGK-SC1 User Manual

Mitsubishi Electric MSZ-FT25VGK-SC1
44 pages
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INDOOR UNIT
PARTS CATALOG (OBB864)
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································4
4. NOISE CRITERIA CURVES ··························5
5. OUTLINES AND DIMENSIONS ·····················6
6. WIRING DIAGRAM ·····································7
7. REFRIGERANT SYSTEM DIAGRAM ··········· 10
8. SERVICE FUNCTIONS ······························ 11
9. MICROPROCESSOR CONTROL ················ 13
10. TROUBLESHOOTING ······························· 22
11. DISASSEMBLY INSTRUCTIONS ················· 36
SERVICE MANUAL
No. OBH864
Models
MSZ-FT25VG
-
E1
MSZ-FT25VGK
-
E1
,
ET1
,
SC1
MSZ-FT35VG
-
E1
MSZ-FT35VGK
-
E1
,
ET1
,
SC1
MSZ-FT50VG
-
E1
MSZ-FT50VGK
-
E1
,
ET1
,
SC1
Outdoor unit service manual
MUZ-FT∙VG Series (OBH865)

Table of Contents

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Mitsubishi Electric MSZ-FT25VGK-SC1 Specifications

General IconGeneral
Cooling Capacity2.5 kW
Heating Capacity3.2 kW
Power Supply220-240 V, 50 Hz
RefrigerantR32
Energy Efficiency Ratio (EER)3.5
Indoor Unit Noise Level19 dB (Low)
Energy Efficiency Ratio (Cooling)3.5
Energy Efficiency Ratio (Heating)4.0
Noise Level (Indoor Unit)19 dB (Low)

Summary

1 TECHNICAL CHANGES

New Model Introduction

Describes the introduction of a new model and its associated changes.

8 SERVICE FUNCTIONS

8-1. TIMER SHORT MODE

Shortens ON/OFF timer and compressor start times for service.

9 MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER OVERVIEW

Explains the functions and buttons of the wireless remote controller.

9-12. EMERGENCY TEST OPERATION

Covers emergency and test run operations for servicing.

10 TROUBLESHOOTING

10-1. CAUTIONS ON TROUBLESHOOTING

Important safety and preliminary checks before troubleshooting.

10-2. FAILURE MODE RECALL FUNCTION

How to recall and identify past error conditions using indicator lamps.

10-3. INSTRUCTION OF TROUBLESHOOTING

Provides a flowchart for diagnosing unit issues.

10-5. TROUBLE CRITERION OF MAIN PARTS

Details how to check main components like thermistors and motors for faults.

10-6. TROUBLESHOOTING FLOW

Step-by-step troubleshooting flow for indoor fan motor issues.

D. CHECK MISWIRING AND SERIAL SIGNAL ERROR

Guide to identify and resolve miswiring or serial signal communication errors.

10-7. TEST POINT DIAGRAM AND VOLTAGE

Provides voltage test points and diagrams for diagnosing electronic components.

11 DISASSEMBLY INSTRUCTIONS

2. REMOVING INTERNAL BOARDS AND ELECTRICAL BOX

Detailed steps for removing various internal P.C. boards and the electrical box.

6. REMOVING INDOOR FAN MOTOR, COIL THERMISTOR, AND LINE FLOW FAN

Steps to remove the indoor fan motor, coil thermistor, and line flow fan.

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