Toshiba MMY-MAP1204T8P-T User Manual

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.

Toshiba MMY-MAP1204T8P-T Specifications

General

Brand	Toshiba
Model	MMY-MAP1204T8P-T
Category	Air Conditioner
Language	English

Summary

Safety and Precautions

SAFETY CAUTION

General safety guidelines and precautions for handling air conditioning equipment.

Definition of Protective Gear

Specifies necessary protective equipment for different work tasks to ensure user safety.

Warning Indications on the Air Conditioner Unit

Details on warning labels and their meanings to prevent injury or damage.

PRECAUTIONS FOR SAFETY

Essential safety steps before any operation, covering electrical hazards and proper handling.

Specifications

CARRYING IN THE OUTDOOR UNIT

Guidelines for safely handling and transporting the outdoor unit, including forklift and rope usage.

SELECTION OF PIPE SIZE

Table and guidelines for selecting appropriate pipe sizes for brazed connections.

Adding refrigerant

Instructions and calculations for adding refrigerant to the system, considering pipe length and unit capacity.

New Refrigerant (R410A)

Safety Caution Concerned to New Refrigerant

Key safety considerations specific to the R410A refrigerant used in the system.

Cautions on Installation/Service

Important operational guidelines and warnings for installing and servicing with R410A.

Tools

Lists required tools and equipment necessary for working with R410A refrigerant.

Wiring Diagrams

1-1. Outdoor Unit

Electrical diagrams illustrating the wiring connections for outdoor units.

1-2. Indoor Unit

Electrical diagrams detailing the wiring for various types of indoor units.

1-2-1. 4-way Cassette Type

Specific wiring diagram for the 4-way cassette indoor unit model.

1-2-6. Concealed Duct Standard Type

Wiring diagram for concealed duct standard type indoor units.

1-2-11. Ceiling Type

Wiring diagram for ceiling type indoor units.

Parts Rating

2-1. Outdoor Unit (50Hz model: MMY-MAP***4*T8*P*)

Lists and rates the parts used in the 50Hz outdoor units.

2-5. Parts Layout in Outdoor Unit

Visual representation of component locations within the outdoor unit.

2-7. Outdoor (Inverter) Print Circuit Board

Detailed diagrams and information about outdoor inverter printed circuit boards.

Refrigerant Piping Systematic Drawing

4-1. Normal Operation (COOL Mode / DEFROST Mode) - High Outside Air Temperature (Roughly 20°C or Above)

Schematic illustrating refrigerant flow during normal cooling and defrost at high outside temperatures.

4-3. Normal Operation (HEAT Mode)

Schematic showing refrigerant flow during normal heating operation.

4-4. Emergency Operation (Cooling Operation under Header Outdoor Unit Backup Scenario)

Diagram depicting refrigerant flow during emergency cooling with backup operation.

Control Outline

Indoor Unit

Details on control systems and specifications for indoor units.

6-1. Indoor Controller Block Diagram

Block diagram illustrating the indoor controller's circuitry and connections.

6-5. Method to Set Indoor Unit Function DN Code

Step-by-step guide for setting indoor unit functions using DN codes.

TEST OPERATION

7-1. Procedure and Summary of Test Operation

Outlines the overall procedure for executing a test operation on the system.

7-2. Check Items before Test Operation (before powering-on)

Essential checks to perform before powering on the system for test operation.

7-4. Address Setup

Procedures for setting up system addresses for indoor and outdoor units.

7-5. Troubleshooting in Test Operation

Guides for diagnosing and resolving issues encountered during test operation.

TROUBLESHOOTING

8-2. Troubleshooting Method

Systematic approach to diagnosing faults using check codes.

List of Check Codes (Indoor Unit)

Comprehensive list of error codes for indoor units and their causes/descriptions.

List of Check Codes (Outdoor Unit)

Comprehensive list of error codes for outdoor units and their causes/descriptions.

8-5. Diagnosis procedure for each check code

Step-by-step fault-finding procedures based on specific check codes.

BACKUP OPERATION (EMERGENCY OPERATION)

9-1. Note for Backup Operation

Important notes and restrictions regarding backup operation modes.

9-2. Compressor Backup Operation Setting

Procedure for setting up compressor backup operation for faulty compressors.

9-3. Outdoor Unit Backup Operation Setting

Procedure for setting up backup operation when an outdoor unit fails.

OUTDOOR UNIT REFRIGERANT RECOVERY METHOD

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

Detailed method for recovering refrigerant from a failed outdoor unit using pump-down.

10-2. How to Operate System While Failed Outdoor Unit Being Repaired

Guidance on operating the system with a reduced number of outdoor units due to repairs.

REPLACING COMPRESSORS

11-1. Compressor Replacement Procedure (Outline)

Step-by-step outline for replacing a compressor, including oil management.

11-3. Check Procedure to Search Cause of Compressor Oil Shortage

Procedure to diagnose issues related to compressor oil levels and potential causes.

OUTDOOR UNIT PARTS REPLACEMENT METHODS

13 P.C. BOARD EXCHANGE PROCEDURES

General procedures for exchanging printed circuit boards in the system.

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

Step-by-step instructions for replacing indoor unit P.C. boards, including EEPROM data handling.

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

Instructions for replacing various P.C. boards in the outdoor unit, including specific interface and IPDU boards.

EXPLODED DIAGRAM/PARTS LIST

SMMS-i OUTDOOR UNIT MMY-MAP0804HT8P, MMY-MAP1004HT8P, MMY-MAP1204HT8P

Exploded view and parts list for specific outdoor unit models MMY-MAP0804/1004/1204.