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Toshiba MMY-MAP1204T8P-SG User Manual

Toshiba MMY-MAP1204T8P-SG
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AIR CONDITIONER (MULTI TYPE)
SERVICE MANUAL
FILE No. A10-005
This service manual provides relevant explanations about new outdoor unit (SMMS-i). Please refer to
the following service manuals for each indoor units.
Outdoor Unit
<SUPER MODULAR MULTI SYSTEM-i>
Model name:
<Heat Pump Model>
<Cooling Only Model>
4-way Air Discharge Cassette Type
(MMU-AP 2H)
A08-004
Compact 4-way Cassette (600 × 600) Type
(MMU-AP 1MH)
A06-002
1-way Air Discharge Cassette Type SH (2 series)
(MMU-AP 2SH)
A05-007
2-way Air Discharge Cassette Type (2 series)
(MMU-AP 2WH)
A10-007
Slim Duct Type
(MMD-AP 1SPH)
A05-007
Fresh Air Intake Indoor Unit Type
(MMD-AP 1HFE)
A06-016
High-wall Type (2 series)
(MMK-AP 2H)
A05-005
High-wall Type (3 series)
(MMK-AP 3H)
SVM-09059
Other indoor units SMMS (1 series) A03-009, A03-010
MMY-MAP0804HT8(Z)(ZG)-E
MMY-MAP1004HT8(Z)(ZG)-E
MMY-MAP1204HT8(Z)(ZG)-E
MMY-MAP1404HT8(Z)(ZG)-E
MMY-MAP1604HT8(Z)(ZG)-E
MMY-MAP0804HT8(Z)(ZG)-TR
MMY-MAP1004HT8(Z)(ZG)-TR
MMY-MAP1204HT8(Z)(ZG)-TR
MMY-MAP1404HT8(Z)(ZG)-TR
MMY-MAP1604HT8(Z)(ZG)-TR
MMY-MAP0804HT8(Z)(ZG)
MMY-MAP1004HT8(Z)(ZG)
MMY-MAP1204HT8(Z)(ZG)
MMY-MAP1404HT8(Z)(ZG)
MMY-MAP1604HT8(Z)(ZG)
MMY-MAP0804HT7(Z)(ZG)
MMY-MAP1004HT7(Z)(ZG)
MMY-MAP1204HT7(Z)(ZG)
MMY-MAP1404HT7(Z)(ZG)
MMY-MAP1604HT7(Z)(ZG)
MMY-MAP0804T8(Z)(ZG)-E
MMY-MAP1004T8(Z)(ZG)-E
MMY-MAP1204T8(Z)(ZG)-E
MMY-MAP1404T8(Z)(ZG)-E
MMY-MAP1604T8(Z)(ZG)-E
MMY-MAP0804T8(Z)(ZG)
MMY-MAP1004T8(Z)(ZG)
MMY-MAP1204T8(Z)(ZG)
MMY-MAP1404T8(Z)(ZG)
MMY-MAP1604T8(Z)(ZG)
MMY-MAP0804T8-SG
MMY-MAP1004T8-SG
MMY-MAP1204T8-SG
MMY-MAP1404T8-SG
MMY-MAP1604T8-SG

Table of Contents

Questions and Answers:

Toshiba MMY-MAP1204T8P-SG Specifications

General IconGeneral
BrandToshiba
ModelMMY-MAP1204T8P-SG
CategoryAir Conditioner
LanguageEnglish

Summary

Original Instruction

Definition of Qualified Installer or Qualified Service Person

Defines the qualifications and knowledge required for personnel installing, maintaining, or repairing air conditioners.

Definition of Protective Gear

Warning Indications on the Air Conditioner Unit

Precautions for Safety

New Refrigerant (R410A)

Safety Caution Concerned to New Refrigerant

Highlights safety precautions due to the high pressure of R410A and changes in refrigerating oil.

Cautions on Installation/Service

Provides essential guidelines for handling R410A during installation and service, emphasizing purity and proper tools.

Pipe Materials

Details the specifications and selection criteria for copper pipes and joints used with R410A refrigerant.

Tools

Required Tools for R410A

Lists tools exclusive to R410A and those interchangeable with conventional refrigerants.

Wiring Diagrams

1-1. Outdoor Unit

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

1-2. Indoor Unit

Details wiring diagrams for various indoor units, starting with the 4-way Air Discharge Cassette Type.

Parts Rating

2-1. Outdoor Unit (50Hz model: MMY-MAP4HT8-E, MAP4HT8-TR, MAP4HT8, MAP4T8-SG)

Lists part ratings for outdoor units, specifically for 50Hz models, detailing components like compressors and valves.

2-2. Outdoor Unit (60Hz model: MMY-MAP4HT7)

Details parts ratings for outdoor units, specifically for 60Hz models, including compressors and sensors.

2-3. Outdoor Inverter (50Hz model: MMY-MAP4HT8-E, MAP4HT8-TR, MAP4HT8, MAP4T8-SG)

Provides parts ratings for outdoor inverter units (50Hz), listing components like P.C. boards, reactors, and sensors.

2-4. Outdoor Inverter (60Hz model: MMY-MAP4HT7)

Lists parts ratings for outdoor inverter units (60Hz), including terminal blocks, PC boards, and various sensors.

2-5. Indoor Unit

Details parts for various indoor unit types, including cassette, concealed duct, and high wall types.

Parts Layout in Outdoor Unit

8, 10, 12HP

Illustrates the parts layout for outdoor units with 8, 10, and 12 HP capacities, showing component locations.

14, 16HP

Shows the parts layout for outdoor units with 14 and 16 HP capacities, detailing component positions.

Parts Layout in Inverter Assembly

Outdoor Unit (8, 10, 12HP)

Illustrates the parts layout within the inverter assembly for outdoor units of 8, 10, and 12 HP.

Outdoor Unit (14, 16HP)

Shows the parts layout of the inverter assembly for outdoor units of 14 and 16 HP, detailing component locations.

Outdoor (Inverter) Print Circuit Board

2-8-1. Interface P.C. board (MCC-1606)

Details the interface P.C. board (MCC-1606), showing connector layout, switches, and component functions.

2-8-2. Inverter P.C. board for compressor (MCC-1596) A3-IPDU

Explains the inverter P.C. board for compressors (MCC-1596) A3-IPDU, including power supply and output terminals.

2-8-3. Inverter P.C. board for fan (MCC-1610)

Details the inverter P.C. board for fans (MCC-1610), showing UART communication interfaces and fan motor outputs.

Refrigerant Piping Systematic Drawing

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

Illustrates the refrigerant piping for normal operation in COOL/DEFROST mode under high outside air temperatures.

4-2. Normal Operation (COOL Mode) - Low Outside Air Temperature (Roughly Below 20 °C)

Shows the refrigerant piping for normal operation in COOL mode under low outside air temperatures.

4-3. Normal Operation (HEAT Mode)

Depicts the refrigerant piping system for normal operation in HEAT mode, illustrating component flow.

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

Illustrates the refrigerant piping during emergency cooling operation with a header unit backup scenario.

4-5. Emergency Operation (Heating Operation under Header Outdoor Unit Backup Scenario)

Shows the refrigerant piping for emergency heating operation with a header unit backup scenario.

4-6. Refrigerant Recovery from Failed Outdoor Unit (Pump-Down Operation under Follower Outdoor Unit Backup Scenario)

Illustrates the refrigerant piping for recovery from a failed outdoor unit using pump-down under backup scenario.

Control Outline

6-1. Indoor Controller Block Diagram

Provides a block diagram of the indoor controller, showing connections between components like MCUs and sensors.

6-2. Indoor Printed Circuit Board

Details the layout and component identification of the indoor unit's printed circuit board (MCC-1570).

6-3. Optional Connector Specifications of Indoor P.C. Board

Lists specifications for optional connectors on the indoor P.C. board, including function, pin number, and remarks.

6-4. Test Operation of Indoor Unit

Explains how to perform test operations on the indoor unit using switches on the P.C. board.

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

Provides a step-by-step procedure for setting indoor unit function DN codes using the wired remote controller.

6-6. Applied Control of Indoor Unit

Details applied control functions for indoor units, including wiring and setting for remote control interface.

6-7. Applied control for Outdoor Unit

Explains applied control functions for outdoor units, including fan speed adjustment and priority operation modes.

6-8. Applied Control of Outdoor Unit

Describes optional control functions accessible via P.C. boards for outdoor units, such as peak-cut and snowfall control.

TEST OPERATION

7-1. Procedure and Summary of Test Operation

Outlines the general procedure for executing a test operation and checking for problems.

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

Lists essential checks for electric wiring and system connections before initiating a test operation.

7-3. Check at Main Power-on

Details checks to be performed after applying main power to indoor and outdoor units for test operation.

7-4. Address Setup

Explains the procedure for setting system addresses for indoor and outdoor units, crucial for proper operation.

7-5. Troubleshooting in Test Operation

Provides guidance on diagnosing and resolving issues encountered during test operation, including check codes.

7-6. Test Operation Check

Details procedures for checking fan operation and cooling/heating performance during test operations.

7-7. Service Support Function

Describes various support functions available for checking connections, clearing errors, and controlling unit operations.

TROUBLESHOOTING

8-1. Overview

Provides a general overview of troubleshooting procedures, required tools, and initial checks for faults.

8-2. Troubleshooting Method

Explains how to identify faults using LCD displays on remote controllers and 7-segment displays on outdoor units.

List of Check Codes (Indoor Unit)

Lists check codes detected by indoor units, their typical fault sites, and descriptions of the errors.

List of Check Codes (Outdoor Unit)

Details check codes detected by outdoor units, including IPDU errors, sensor errors, and communication issues.

8-3. Troubleshooting Based on Information Displayed on Remote Controller

Guides troubleshooting based on information displayed on remote controllers, including error history access.

8-4. Check Codes Displayed on Remote Controller and SMMS-i Outdoor Unit (7-Segment Display on I/F Board) and Locations to Be Checked

Correlates check codes displayed on remote controllers and outdoor unit 7-segment displays with specific locations to check.

Checklist 1

Provides a checklist for verifying installation work and ensuring no problems exist before operation.

Checklist 2

Details the calculation method for additional refrigerant amounts based on pipe diameter and system horsepower.

Check at Main Power-on

Outlines checks required for outdoor and indoor units after main power is turned on, before test operation.

Address Setup

7-4-1. Precautions

Lists precautions for address setup, including manual vs. automatic methods and time requirements.

7-4-2. Address Setup and Check Procedure

Details the procedure for setting addresses and checking system information after setup.

7-4-3. Address Setup Procedure

Provides specific procedures for automatic and manual address setup, including wiring and switch settings.

7-4-4. Check after Address Setup when Central Control System Is Connected

Details checks to confirm correct setup after address configuration when a central control system is connected.

Troubleshooting in Test Operation

7-5-1. A Check Code Is Displayed on the Remote Controller

Diagnoses causes and countermeasures for check codes displayed on the remote controller during test operation.

7-5-2. Operation from the indoor remote controller is not accepted, and a check code is displayed on the 7-segment display of the interface PC board of the header unit.

Troubleshoots issues where remote controller commands are not accepted and check codes appear on the header unit.

Test Operation Check

7-6-1. Fan Check

Details the procedure for checking the fan operation of indoor units, including air discharge and sound.

7-6-2. Cooling/Heating Test Operation Check

Explains how to perform cooling/heating test operations using both wired and wireless remote controllers.

Service Support Function

7-7-1. Check Function for Connecting of Refrigerant and Control Lines

Provides a function to check for misconnections in refrigerant and control lines between indoor and outdoor units.

7-7-2. Function to Start/Stop (ON/OFF) Indoor Unit from Outdoor Unit

Describes functions to start/stop indoor units collectively or individually from outdoor unit switches.

7-7-3. Error Clearing Function

Explains how to clear errors from the outdoor unit via interface P.C. board switches or by resetting power.

7-7-4. Remote Controller Distinction Function

Allows distinguishing the remote controller connected to the indoor unit using switches on the header unit interface P.C. board.

7-7-5. Pulse Motor Valve (PMV) Forced Open/Close Function in Indoor Unit

Details the function to force open or close PMV for 2 minutes in all indoor units using interface P.C. board switches.

7-7-6. Pulse Motor Valve (PMV) Forced Open Fully/Close fully Function in Outdoor Unit

Describes the function to force open or close PMV1/PMV2 and PMV4 for 2 minutes in the outdoor unit.

7-7-7. Solenoid Valve Forced Open/Close Function in Outdoor Unit

Explains how to force open or close each solenoid valve in the outdoor unit using interface P.C. board switches.

7-7-8. Fan Operation Check in Outdoor Unit

Details how to check outdoor unit fan operation and control fan speed using interface P.C. board switches.

7-7-9. Abnormal Outdoor Unit Discrimination Method By Fan Operating Function

Provides a function to discriminate abnormal outdoor units by forcedly operating the fan.

7-7-10. Manual Adjustment Function of Outside Temperature (TO) Sensor

Explains how to manually fix the TO sensor value when the unit stops abnormally due to sensor failure.

7-7-11. Monitor Function of Remote Controller Switch

Describes how to use monitor functions to check sensor temperatures or operation status via the remote controller.

9 BACKUP OPERATION (EMERGENCY OPERATION)

9-1. Note for Backup Operation

Provides crucial notes on backup operation methods based on fault contents, including compressor and outdoor unit backup.

9-2. Compressor Backup Operation Setting

Details the procedure for setting compressor backup operation by adjusting DIP switches on the outdoor unit's P.C. board.

9-3. Outdoor Unit Backup Operation Setting

Explains how to set outdoor unit backup operation when a fault occurs in one of the outdoor units.

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

Describes a method for quick backup operation during summer or when heating is not required, regardless of unit type.

10 OUTDOOR UNIT REFRIGERANT RECOVERY METHOD

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

Explains the process of recovering refrigerant from a failed outdoor unit using pump-down operation.

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

Details how to operate the system after refrigerant recovery, including adjusting refrigerant amounts.

10-3. Work procedure after Repair

Outlines the work procedure after repair, focusing on vacuuming and PMV operations using switches.

11 REPLACING COMPRESSORS

11-1. Compressor Replacement Procedure (Outline)

Provides an outline for compressor replacement, including refrigerant recovery and oil adjustment procedures.

11-2. Replacement of Compressors

Details procedures for checking oil color, measuring oil amounts, and adjusting oil in new compressors.

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

Outlines a procedure to identify the cause of compressor oil shortage by checking various components and connections.

12 OUTDOOR UNIT PARTS REPLACEMENT METHODS

Cabinet

Details the detachment and attachment procedures for the outdoor unit cabinet, including screw locations and warnings.

Propeller fan Fan motor

Provides instructions for detaching and attaching the fan motor and propeller fan, including cautions for alignment.

Heat exchanger

Describes the detachment procedure for the heat exchanger, including removing the cabinet, motor base, and piping.

Inverter assembly

Outlines the detachment and attachment procedures for the inverter assembly, including removing covers, screws, and wiring.

Reactor assembly

Details the detachment and attachment procedures for the reactor assembly, including removing screws and fixing claws.

2-way valve coils Pressure sensors locations

Shows the locations of 2-way valve coils and pressure sensors for various outdoor unit models.

Temperature sensors - locations and identification colors

Illustrates the locations and identifies temperature sensors by color for different outdoor unit models.

Pipe fixing rubber - detachment/attachment

Explains the detachment and attachment procedures for pipe fixing rubber and SUS bands, including alignment and tightening.

4-way valve - detachment/attachment

Provides detailed steps for detaching and attaching the 4-way valve and PMV assembly, including cutting pipes and ensuring proper connection.

13 P.C. BOARD EXCHANGE PROCEDURES

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

Details the procedure for replacing indoor P.C. boards, including points to note and methods for reading/writing EEPROM data.

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

Provides a list of service P.C. boards for outdoor units and details the configuration of the inverter assembly.

13-2-3. Interface board (MCC-1606) replacement method

13-2-4. Comp-IPDU P.C. Board (MCC-1596) Replacement Procedure

13-2-5. Fan IPDU P.C. Board (MCC-1610) Replacement Procedure

13-2-6. Noise Filter P.C. Board (MCC-1608 A, B) Replacement Procedure

8-9. Sensor Characteristics

Temperature sensor characteristics

Provides temperature vs. resistance characteristics for outdoor sensors (TE1, TL, TO) and indoor TA sensor.

Pressure sensor characteristics

Details input/output wiring summary and output voltage vs. pressure characteristics for outdoor pressure sensors (Pd, Ps).

8-10. Pressure Sensor Output Check

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