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Toshiba MMY-MAP1204HT8P User Manual

Toshiba MMY-MAP1204HT8P
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SERVICE MANUAL
AIR-CONDITIONER (MULTI TYPE)
<SUPER MODULAR MULTI SYSTEM - i>
Outdoor Unit
Model name:
FILE NO. SVM-13024-2
MMY-MAP0804HT8(J)P
MMY-MAP1004HT8(J)P
MMY-MAP1204HT8(J)P
MMY-MAP1404HT8(J)P
MMY-MAP1604HT8(J)P
MMY-MAP0804HT8(J)P-E
MMY-MAP1004HT8(J)P-E
MMY-MAP1204HT8(J)P-E
MMY-MAP1404HT8(J)P-E
MMY-MAP1604HT8(J)P-E
MMY-MAP0804HT8(J)P-TR
MMY-MAP1004HT8(J)P-TR
MMY-MAP1204HT8(J)P-TR
MMY-MAP1404HT8(J)P-TR
MMY-MAP1604HT8(J)P-TR
<Heat Pump Model>
<4-way Cassette Type>
(MMU-AP***4HP-E) (Made in Thailand model) SVM-13-011
<2-way Cassette Type>
(MMU-AP
***
2WH) A10-007
<Concealed Duct Standard Type>
(MMD-AP
***
6BH-E) A12-005
<Slim Duct Type>
(MMD-AP0244SPH-E, AP0274SPH-E) A12-005
Fresh Air Intake Indoor Unit Type
(MMD-AP
****
HFE) A06-016
<Air to Air Heat Exchanger with DX Coil Unit Type>
(MMD-VN
*****
HEXE
*
) A10-022-2
High-wall Type
(MMK-AP
***
3H) (Made in Thailand model) SVM-09-059
Console Type
(MML-AP
****
NH-E) (Made in Thailand model) SVM-11-036
Other indoor units
(MM
*
-AP
*****
H
*
) A10-033
MMY-MAP0804HT7(J)P
MMY-MAP1004HT7(J)P
MMY-MAP1204HT7(J)P
MMY-MAP1404HT7(J)P
MMY-MAP1604HT7(J)P
MMY-MAP0804T8(J)P
MMY-MAP1004T8(J)P
MMY-MAP1204T8(J)P
MMY-MAP1404T8(J)P
MMY-MAP1604T8(J)P
MMY-MAP0804T8(J)P-T
MMY-MAP1004T8(J)P-T
MMY-MAP1204T8(J)P-T
MMY-MAP1404T8(J)P-T
MMY-MAP1604T8(J)P-T
MMY-MAP0804T8(J)P-SG
MMY-MAP1004T8(J)P-SG
MMY-MAP1204T8(J)P-SG
MMY-MAP1404T8(J)P-SG
MMY-MAP1604T8(J)P-SG
<Cooling Only Model>
MMY-MAP0804T8(J)P-ID
MMY-MAP1004T8(J)P-ID
MMY-MAP1204T8(J)P-ID
MMY-MAP1404T8(J)P-ID
MMY-MAP1604T8(J)P-ID
This service manual provides relevant explanations about new outdoor unit (SMMS-i).
Please refer to the following service manuals for each indoor units.

Table of Contents

Questions and Answers:

Toshiba MMY-MAP1204HT8P Specifications

General IconGeneral
BrandToshiba
ModelMMY-MAP1204HT8P
CategoryAir Conditioner
LanguageEnglish

Summary

<SUPER MODULAR MULTI SYSTEM - i>

1 Wiring Diagrams

1-1. Outdoor Unit Wiring Diagrams

Provides wiring diagrams for outdoor units, covering models MMY-MAP0804*, MAP1004*, and MAP1204*.

1-2. Indoor Unit Wiring Diagrams

Details wiring diagrams for various indoor unit types including cassette, duct, ceiling, and wall units.

2 Parts Rating

2-1. Outdoor Unit Parts Rating (50Hz Models)

Lists parts ratings for outdoor units with 50Hz specifications, including compressors and valves.

3 Refrigerant Piping Systematic Drawing

4 Combined Refrigerant Piping System Schematic Diagrams

5 Control Outline

6 Applied Control and Functions (including Circuit Configuration)

6-1. Indoor Unit Controls and Circuit Configuration

Details indoor unit control block diagrams, PCB layouts, connector specifications, test operations, and DN code settings.

6-7. Applied Control for Outdoor Unit

Covers applied controls for outdoor units, including fan static pressure and priority operation modes.

6-8. Outdoor Unit Control Functions

Details applied controls for outdoor units, including peak-cut, snowfall, night operation, and mode selection.

7 TEST OPERATION

7-1. Test Operation Procedures

Covers procedure, pre-checks, power-on checks, address setup, troubleshooting, and fan checks.

7-7. Service Support Functions

Various functions for service support, including refrigerant line checks, operation control, and error clearing.

8 TROUBLESHOOTING

8-1. Troubleshooting Overview and Methods

Covers troubleshooting overview, methods, and common faults with possible causes.

8-2. Check Codes and Diagnosis

Lists and analyzes check codes from remote controllers and outdoor units for fault identification and diagnosis.

8-5. Diagnosis Procedures for Specific Check Codes

Provides detailed diagnostic flowcharts for specific check codes encountered during operation.

8-8. Refrigerating Cycle Leakage/Clogging Troubleshooting

Details troubleshooting for leakage or clogging in the refrigerating cycle and oil circuit, listing check codes.

9 BACKUP OPERATION (EMERGENCY OPERATION)

9-1. Notes for Backup Operation

Provides important notes and examples regarding compressor and outdoor unit backup operations.

9-2. Compressor Backup Operation Setting

Details the procedure for setting up compressor backup operation in outdoor units with faulty compressors.

9-3. Outdoor Unit Backup Operation Setting

Explains how to set up outdoor unit backup operation when a fault occurs in one unit of a multi-unit system.

9-4. Cooling-Season Outdoor Unit Backup Operation Setting

Describes a specific backup operation setting for cooling-season use, disabling heating operation.

10 OUTDOOR UNIT REFRIGERANT RECOVERY METHOD

10-1. Refrigerant Recovery from Failed Outdoor Unit (Pump-Down)

Provides procedures for refrigerant recovery from a failed outdoor unit using pump-down operation.

10-2. Operating System with Failed Outdoor Unit During Repair

Explains how to adjust refrigerant amount for system operation while a failed outdoor unit is under repair.

10-3. Work Procedure After Repair

Details the work procedure after repair, including vacuuming and refrigerant charging steps.

11 REPLACING COMPRESSORS

11-1. Compressor Replacement Procedure (Outline)

Provides an outline for replacing compressors, including oil checks and handling precautions.

11-2. Replacement of Compressors

Details the procedure for replacing compressors, including oil adjustment for new units.

11-3. Check Procedure for Compressor Oil Shortage Cause

Guides on how to search for the cause of compressor oil shortage, involving sensor checks and valve operation.

12 OUTDOOR UNIT PARTS REPLACEMENT METHODS

13 P.C. BOARD EXCHANGE PROCEDURES

13-1. Replacement of Indoor P.C. Boards

Details the procedure for replacing indoor P.C. boards, including reading and writing EEPROM data.

13-2. Replacement of Outdoor P.C. Boards

Lists service P.C. boards for outdoor units and provides replacement procedures for interface, compressor, and fan IPDUs.

14 EXPLODED DIAGRAM/PARTS LIST

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