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Mitsubishi Electric MSC-A07YV-E1 - User Manual

Mitsubishi Electric MSC-A07YV-E1
32 pages
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SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM················8
8. MICROPROCESSOR CONTROL ······················9
9. SERVICE FUNCTIONS ····································17
10. TROUBLESHOOTING······································19
11. DISASSEMBLY INSTRUCTIONS·····················26
12. PARTS LIST······················································28
Wireless type
Models
MSC-A07YV -
(WH)
MSC-A09YV -
(WH)
MSC-A12YV -
(WH)
E1
E1
E1
MSC-A07YV -
MSC-A09YV -
MSC-A12YV -
E1
E1
E1
No. OB329
HFC
utilized
R410A
SPLIT-TYPE, AIR CONDITIONERS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Indication of model name
NOTE:
•This manual describes technical data of indoor units.
•As for outdoor units MU-A07/A09/A12YV - , refer to the service manual OB330.
•As for outdoor units MUH-A07/A09/A12YV - , refer to the service manual OB331.
•As for outdoor units MUX-A10/A19/A20/A25/A26WV - , refer to the service manual OB307 REVISED
EDITION-A.
•As for outdoor units MUX-A22WV - , refer to the service manual OB318.
•As for outdoor units MXZ-A18/A26/A32WV - , refer to the service manual OB319.
E1
E1
E1
E1
E1
OB329-1.qxp 03.12.3 1:16 PM Page 1
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Summary

Technical Changes

Indoor Unit Part Names and Functions

Indoor Unit Component Identification

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

Accessories and Remote Controller

Indoor Unit Accessories List

Lists included accessories for the indoor unit such as installation plates and screws.

Remote Controller Layout and Functions

Details the components, buttons, and display sections of the wireless remote controller.

Specification

Indoor Unit Specifications

Provides technical data including capacity, power, dimensions, and noise levels for indoor units.

Noise Criteria Curves

Sound Pressure Level Charts

Graphs illustrating sound pressure levels across different frequencies and fan speeds.

Outlines and Dimensions

Indoor Unit Dimensional Drawings

Presents detailed diagrams showing the physical dimensions and installation points of the indoor unit.

Wiring Diagram

Indoor Unit Electrical Wiring Diagram

Illustrates the electrical connections and symbol key for the indoor unit.

Refrigerant System Diagram

Indoor Unit Refrigerant Piping

Shows the refrigerant pipes and the locations of thermistors within the indoor unit.

Microprocessor Control

Remote Controller and Indicator Operation

Explains the remote controller's interface and the meaning of the indoor unit's operation indicator lamp.

Cool Operation Modes and Controls

Details thermostat control and fan speed adjustments during cooling operation.

Microprocessor Control

Cool Operation: Frost Prevention and Dry Mode

Covers coil frost prevention mechanisms and the setup for dry operation mode.

Dry Mode Operation Details

Explains dry mode operation, including set temperature determination and fan speed.

Microprocessor Control

Dry Mode Controls and Fan Operation

Details compressor/fan cycles, cold air prevention, and fan-only operation.

Fan and Heat Operation Modes

Describes fan-only mode and heat operation controls, including cold air prevention.

Microprocessor Control

Warm Air Control and I Feel Control

Explains warm air control, the 'I Feel Control' mode, and its operation.

Microprocessor Control

I Feel Control Mode Settings and Fuzzy Logic

Details initial set temperature decisions, fuzzy control logic, and mode specifics.

Microprocessor Control

Fan Motor Control and Auto Vane Operation

Covers fan motor feedback control, lock-up protection, and automatic vane positioning.

Microprocessor Control

Econo Cool and Timer Operation Setup

Explains Econo Cool mode, swing operations, and how to set timer functions.

Microprocessor Control

Timer Cancellation and Emergency Operation

Describes how to cancel timers and use the emergency operation switch.

Service Functions

Timer Short Mode and PC Board Modification

Details setting timer short mode and modifying PC boards for multiple unit operation.

Service Functions

Remote Controller Type Setting and Auto Restart

Covers setting the remote controller type and configuring the auto restart function.

Troubleshooting Guide

Troubleshooting Precautions and Procedures

Outlines safety precautions, servicing care, and general troubleshooting procedures.

Troubleshooting Flowchart

Operation Status Troubleshooting

Provides a flowchart to diagnose issues based on the unit's operational status.

Troubleshooting Check Table

Abnormality Indicators and Checks

A table mapping operation indicator lamp patterns to symptoms and required checks.

Trouble Criterion of Main Parts

Component Resistance and Voltage Checks

Details methods for checking resistance and voltage of key components like thermistors and motors.

Remote Controller and Board Checks

Indoor Electronic Control Board Checks

Guides on checking the indoor electronic control PC board for faults.

Mis-wiring and Serial Signal Error Checks

Serial Signal Error Diagnosis Flowchart

A flowchart to diagnose and resolve issues related to serial signal errors.

Test Point Diagram and Voltage

Indoor Electronic Control P.C. Board Details

Diagrams showing test points, voltages, and component locations on the indoor electronic PC board.

Disassembly Instructions

Front Panel and Electronic Board Removal

Step-by-step guide for removing the front panel and the indoor electronic control PC board.

Disassembly Instructions

Electrical Box, Nozzle, and Fan Removal

Instructions for removing the electrical box, nozzle assembly, vane motor, and fan components.

Parts List

Indoor Unit Structural Parts

A list of structural components for the indoor unit with part numbers.

Parts List

Indoor Unit Electrical and Heat Exchanger Parts

Lists electrical parts and components of the indoor unit heat exchanger.

Parts List

Air Cleaning Filter Information

Details on the air cleaning filter's function, life, and maintenance.

Summary

Technical Changes

Indoor Unit Part Names and Functions

Indoor Unit Component Identification

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

Accessories and Remote Controller

Indoor Unit Accessories List

Lists included accessories for the indoor unit such as installation plates and screws.

Remote Controller Layout and Functions

Details the components, buttons, and display sections of the wireless remote controller.

Specification

Indoor Unit Specifications

Provides technical data including capacity, power, dimensions, and noise levels for indoor units.

Noise Criteria Curves

Sound Pressure Level Charts

Graphs illustrating sound pressure levels across different frequencies and fan speeds.

Outlines and Dimensions

Indoor Unit Dimensional Drawings

Presents detailed diagrams showing the physical dimensions and installation points of the indoor unit.

Wiring Diagram

Indoor Unit Electrical Wiring Diagram

Illustrates the electrical connections and symbol key for the indoor unit.

Refrigerant System Diagram

Indoor Unit Refrigerant Piping

Shows the refrigerant pipes and the locations of thermistors within the indoor unit.

Microprocessor Control

Remote Controller and Indicator Operation

Explains the remote controller's interface and the meaning of the indoor unit's operation indicator lamp.

Cool Operation Modes and Controls

Details thermostat control and fan speed adjustments during cooling operation.

Microprocessor Control

Cool Operation: Frost Prevention and Dry Mode

Covers coil frost prevention mechanisms and the setup for dry operation mode.

Dry Mode Operation Details

Explains dry mode operation, including set temperature determination and fan speed.

Microprocessor Control

Dry Mode Controls and Fan Operation

Details compressor/fan cycles, cold air prevention, and fan-only operation.

Fan and Heat Operation Modes

Describes fan-only mode and heat operation controls, including cold air prevention.

Microprocessor Control

Warm Air Control and I Feel Control

Explains warm air control, the 'I Feel Control' mode, and its operation.

Microprocessor Control

I Feel Control Mode Settings and Fuzzy Logic

Details initial set temperature decisions, fuzzy control logic, and mode specifics.

Microprocessor Control

Fan Motor Control and Auto Vane Operation

Covers fan motor feedback control, lock-up protection, and automatic vane positioning.

Microprocessor Control

Econo Cool and Timer Operation Setup

Explains Econo Cool mode, swing operations, and how to set timer functions.

Microprocessor Control

Timer Cancellation and Emergency Operation

Describes how to cancel timers and use the emergency operation switch.

Service Functions

Timer Short Mode and PC Board Modification

Details setting timer short mode and modifying PC boards for multiple unit operation.

Service Functions

Remote Controller Type Setting and Auto Restart

Covers setting the remote controller type and configuring the auto restart function.

Troubleshooting Guide

Troubleshooting Precautions and Procedures

Outlines safety precautions, servicing care, and general troubleshooting procedures.

Troubleshooting Flowchart

Operation Status Troubleshooting

Provides a flowchart to diagnose issues based on the unit's operational status.

Troubleshooting Check Table

Abnormality Indicators and Checks

A table mapping operation indicator lamp patterns to symptoms and required checks.

Trouble Criterion of Main Parts

Component Resistance and Voltage Checks

Details methods for checking resistance and voltage of key components like thermistors and motors.

Remote Controller and Board Checks

Indoor Electronic Control Board Checks

Guides on checking the indoor electronic control PC board for faults.

Mis-wiring and Serial Signal Error Checks

Serial Signal Error Diagnosis Flowchart

A flowchart to diagnose and resolve issues related to serial signal errors.

Test Point Diagram and Voltage

Indoor Electronic Control P.C. Board Details

Diagrams showing test points, voltages, and component locations on the indoor electronic PC board.

Disassembly Instructions

Front Panel and Electronic Board Removal

Step-by-step guide for removing the front panel and the indoor electronic control PC board.

Disassembly Instructions

Electrical Box, Nozzle, and Fan Removal

Instructions for removing the electrical box, nozzle assembly, vane motor, and fan components.

Parts List

Indoor Unit Structural Parts

A list of structural components for the indoor unit with part numbers.

Parts List

Indoor Unit Electrical and Heat Exchanger Parts

Lists electrical parts and components of the indoor unit heat exchanger.

Parts List

Air Cleaning Filter Information

Details on the air cleaning filter's function, life, and maintenance.

Mitsubishi Electric MSC-A07YV-E1 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMSC-A07YV-E1
CategoryAir Conditioner
LanguageEnglish

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