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Mitsubishi Electric MUX-18RV User Manual

Mitsubishi Electric MUX-18RV
186 pages
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SERVICE MANUAL
SPLIT-TYPE,AIR CONDITIONERS
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················4
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························7
4. INDOOR UNITS COMBINATION ·······················8
5. SPECIFICATION···············································13
6. NOISE CRITERIA CURVES···························· 19
7. OUTLINES AND DIMENSIONS ······················ 22
8. WIRING DIAGRAM ··········································28
9. REFRIGERANT SYSTEM DIAGRAM··············35
10. PERFORMANCE CURVES······························46
11. MICROPROCESSOR CONTROL···················102
12. SERVICE FUNCTIONS···································120
13. TROUBLESHOOTING····································122
14. DISASSEMBLY INSTRUCTIONS···················148
15. PARTS LIST····················································166
16. OPTIONAL PARTS·········································184
Wireless type
Models
MSC-07RV -
(
WH
)
· MU-07RV -
MSC-09RV -
(
WH
)
· MU-09RV -
MSC-12RV -
(
WH
)
· MU-12RV -
MSC-07RV -
(
WH
)
· MUH-07RV -
MSC-09RV -
(
WH
)
· MUH-09RV -
MSC-12RV -
(
WH
)
· MUH-12RV -
Multi system type
MSC-07RV -
(
WH
)
· MUX-10RV -
MSC-09RV -
(
WH
)
· MUX-18RV -
MSC-12RV -
(
WH
)
· MUX-24RV -
Inverter controlled multi system type
· MXZ-18RV -
· MXZ-32RV -
E1
E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
No. OB227
REVISED EDITION-B
MSC-07RV -
MSC-09RV -
MSC-12RV -
E1
E1
E1
Revision:
MUX-10/18/24RV - has been added.
MXZ-18/32RV - has been added.
Noise criteria curves has been added.
Performance data has been added.
Specification has been partially modified.
Refrigerant system diagram has been partially
modified.
• Please void OB227 REVISED EDITION-A
E1
E1
NOTE: (Only MXZ-32RV - )
This manual describes technical data of MSC
type indoor unit .
For other indoor unit refer to the service manuals
No. OB229 REVISED EDITION-A of correspond-
ing models.
E1

Table of Contents

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Mitsubishi Electric MUX-18RV Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMUX-18RV
CategoryAir Conditioner
LanguageEnglish

Summary

Technical Changes

SW2 Functionality

Details about SW2 on the indoor electronic control P.C. board, including AUTO RESTART FUNCTION setting.

Feature Updates

Notes additions like ECONO COOL and removal of SLEEP MODE function.

Outdoor Model Changes

States that the outdoor model has been changed, listing specific model updates.

Part Names and Functions

Indoor Unit Components

Lists and illustrates the components of the indoor unit.

Outdoor Unit Components

Lists and illustrates the components of the outdoor unit.

Indoor/Outdoor Correspondence Tables

MXZ-18RV Combinations

Details the indoor/outdoor unit combinations for the MXZ-18RV model.

MXZ-32RV Combinations

Details the indoor/outdoor unit combinations for the MXZ-32RV model.

Indoor Unit Combinations

MXZ-18RV Capacity Data

Provides cooling and heating capacity data for MXZ-18RV indoor unit combinations.

MXZ-32RV Capacity Data

Provides cooling capacity data for MXZ-32RV indoor unit combinations.

Specifications

Indoor Unit Specifications

Details specifications for MSC, MUH, and MSC (multi-system) indoor units.

Outdoor Unit Specifications

Details specifications for MU, MUX, and MXZ outdoor units.

Noise Criteria Curves

MSC-07/09RV Noise Curves

Noise criteria curves for MSC-07/09RV indoor units.

MU-07/09RV Noise Curves

Noise criteria curves for MU-07/09RV outdoor units.

MXZ-18RV Noise Curves

Noise criteria curves for MXZ-18RV outdoor units.

Outlines and Dimensions

Indoor Unit Dimensions

Provides outlines and dimensions for MSC series indoor units.

MU Outdoor Unit Dimensions

Provides outlines and dimensions for MU series outdoor units.

MUX Outdoor Unit Dimensions

Provides outlines and dimensions for MUX series outdoor units.

MXZ Outdoor Unit Dimensions

Provides outlines and dimensions for MXZ series outdoor units.

Wiring Diagrams

Indoor Unit Wiring

Shows the wiring diagram for the indoor unit, including symbols and connections.

MU Series Outdoor Unit Wiring

Shows the wiring diagram for MU series outdoor units.

MUX Series Outdoor Unit Wiring

Shows the wiring diagram for MUX series outdoor units.

MXZ Series Outdoor Unit Wiring

Shows the wiring diagram for MXZ series outdoor units.

Refrigerant System Diagrams

MSC/MU Series Refrigerant Diagram

Shows the refrigerant system diagram for MSC indoor and MU outdoor units.

MSC/MUH Series Refrigerant Diagram

Shows the refrigerant system diagram for MSC indoor and MUH outdoor units.

Refrigerant Piping and Charge

Maximum Refrigerant Piping Length

Specifies the maximum allowable refrigerant piping length.

Additional Refrigerant Charge

Details the additional refrigerant charge required based on piping length and model.

Piping Preparation

Provides specifications for commercially available pipes and installation notes.

Performance Curves

Capacity and Input Curves

Shows capacity and input curves for various indoor and outdoor unit combinations.

Outdoor Low Pressure and Current

Presents outdoor low pressure and current graphs for various units in COOL mode.

Inverter Frequency Correction

Shows capacity and input correction curves based on inverter output frequency.

Microprocessor Control

Wireless Remote Controller

Explains the functions and layout of the wireless remote controller.

Indoor Unit Operation Indicators

Details the meaning of the operation indicator lamp on the indoor unit.

Cool Operation Modes

Cool Operation Details

Explains COOL operation, fan speed control, and frost prevention.

Dry Operation Details

Explains how to perform DRY operation and its functioning.

Other Operation Modes and Controls

Fan Operation and Controls

Explains FAN operation, compressor/fan logic, and coil frost prevention.

Heat Operation Details

Explains how to perform HEAT operation and its controls.

I FEEL CONTROL Operation

Explains how to operate the 'I FEEL CONTROL' mode and its features.

Service Functions

Compulsory Defrosting Mode

Explains how to perform compulsory defrosting for service purposes.

Defrost Setting Adjustments

Details how to change defrost interval time and temperature settings.

Timer Short Mode

Explains how to shorten timer settings for service purposes.

Remote Controller Modification

Describes modifications to P.C. boards for individual indoor unit operation.

Troubleshooting

Troubleshooting Cautions

Provides essential cautions and checks before starting troubleshooting.

Troubleshooting Procedures

Outlines the general procedure for diagnosing and resolving abnormalities.

Indoor Unit Troubleshooting Table

Diagnoses indoor unit abnormalities based on indicator lights and symptoms.

Outdoor Unit Troubleshooting Table

Lists outdoor unit symptoms, detecting methods, and check points for abnormalities.

Trouble Criterion of Main Parts

Indoor Component Criteria

Provides criteria for checking indoor components like thermistors and motors.

Compressor and Motor Checks

Provides criteria for checking the compressor and outdoor fan motor.

Reversing Valve and Solenoid Coil Checks

Provides criteria for checking reversing valve coils and solenoid coils.

Safety Switch and Thermistor Checks

Provides criteria for checking high/low pressure switches and thermistors.

Simple Check Methods

Inverter and Compressor Checks

Details methods for checking inverter, compressor phase, and winding.

Mis-wiring and Serial Signal Error Checks

Troubleshooting steps for mis-wiring and serial signal errors.

Test Point Diagrams and Voltages

Indoor Electronic Control P.C. Board

Provides test points and voltage information for the indoor electronic control P.C. board.

Outdoor Deicer P.C. Board

Shows test points and connections for the outdoor deicer P.C. board.

MXZ-18RV Outdoor P.C. Board

Provides thermistor characteristics and test points for MXZ-18RV outdoor P.C. board.

MXZ-32RV Electronic Control P.C. Board

Provides thermistor characteristics and test points for MXZ-32RV electronic control P.C. board.

Disassembly Instructions

Indoor Unit Disassembly

Details the procedure for removing indoor unit components like panels and boards.

MU Series Outdoor Unit Disassembly

Details the procedure for removing cabinet and electrical parts of MU outdoor units.

MUH Series Outdoor Unit Disassembly

Details the procedure for removing cabinet and deicer P.C. board of MUH outdoor units.

MUX Series Outdoor Unit Disassembly

Details the procedure for removing cabinet, propeller, and fan motor of MUX outdoor units.

MXZ Series Outdoor Unit Disassembly

Details the procedure for removing compressor and outdoor fan motor.

Parts List

Indoor Unit Structural Parts

Lists structural parts of the indoor units with part numbers.

Indoor Unit Electrical Parts

Lists electrical parts for indoor units with part numbers.

Outdoor Unit Structural Parts

Lists structural parts for MU series outdoor units.

Outdoor Unit Functional and Electrical Parts

Lists functional and electrical parts for MUX and MUH outdoor units.

Remote Controller and Accessory Parts

Lists the remote controller and accessory parts.

Optional Parts

Air Cleaning Filter

Describes the air cleaning filter and its maintenance.

Deodorizing Filter

Describes the deodorizing filter and its cleaning.

Different-Diameter Piping

Provides specifications for different diameter pipes used for installation.

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