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Toshiba MMY-MAP0804HT8(Z)(ZG)-E - User Manual

Toshiba MMY-MAP0804HT8(Z)(ZG)-E
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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

  • R
    Richard MitchellOct 31, 2025
    What to do if my Toshiba MMY-MAP0804HT8(Z)(ZG)-E isn't responding to the remote but there's no check code?
    • C
      codyoliverOct 31, 2025
      If your Toshiba Air Conditioner unit isn't responding to the indoor remote controller, but there's no check code on the header unit's interface PC board, consider these possibilities: * The communication line between the indoor and outdoor units might not be connected. Modify the wiring. * The line address and indoor address may not be set. Set up the address. * If in indoor group control, the power of the header unit of the group might not be turned on. Turn on the power. * A group address might be set to the follower unit for individual control. Set the group address to “0” in the case of individual control. * The power might not be turned on. Turn on the power. * The indoor remote controller might not be connected with a wire. Modify the wiring. * There might be miswiring...
  • M
    Mr. Scott Watkins DDSNov 9, 2025
    Why does my Toshiba MMY-MAP0804HT8(Z)(ZG)-E show fewer connected units than expected after address setup?
    • J
      Joshua HarrisNov 10, 2025
      If, after setting up the addresses on your Toshiba Air Conditioner, the number of connected outdoor or indoor units displayed is lower than expected, it could be due to: * Miswiring or an unconnected wire in the communication lines between outdoor units. After modifying the wiring, set up the addresses again and check the number of connected outdoor units. * Miswiring or an unconnected wire in the communication lines between indoor units. After modifying the wiring, set up the addresses again and check the number of connected indoor units. * The indoor remote controller is not connected with wire or there is miswiring of the indoor remote controller. Use the main indoor remote controller connected to a group, start a test operation, specify the unit that is not operating (the unit n...
  • W
    Wendy HutchinsonNov 20, 2025
    Why does my Toshiba MMY-MAP0804HT8(Z)(ZG)-E Air Conditioner remote controller display a check code?
    • J
      Jessica JacksonNov 20, 2025
      If a check code is displayed on your Toshiba Air Conditioner's remote controller, it could be due to several reasons: * The outdoor power might be off, so ensure the header outdoor unit power is on. * There might be an address setup error. In this case, set up the address again. * There could be no outdoor terminal resistance, or there might be two or more resistances. Check SW30 bit 2 of the header unit. If there is no connection between multiple refrigerant lines, SW30 bit 2 is on. If there is a connection between multiple refrigerant lines, SW30 bit 2 of the connected header unit is turned on only for one line. * It's possible there's a transmission circuit error at the interface side, which would require replacing the interface PC board. * Communication from all the indoor u...

Summary

SERVICE MANUAL

Outdoor Unit

Information pertaining to the SMMS-i outdoor unit.

Wiring Diagrams

Outdoor Unit

Wiring diagrams for the outdoor unit.

Indoor Unit

Wiring diagrams for various types of indoor units.

New Refrigerant (R410 A)

Safety Caution Concerned to New Refrigerant

Safety warnings related to the R410A refrigerant.

Cautions on Installation;Service

Cautions for installation and service procedures.

Parts Rating

Outdoor Unit

Parts rating and specifications for outdoor units.

Indoor Unit

Parts rating and specifications for various indoor units.

Parts Layout in Outdoor Unit

Visual layout and identification of parts in the outdoor unit.

Refrigerant Piping Systematic Drawing

Combined Refrigerant Piping System Schematic Diagrams

Normal Operation

Details on normal cooling and heating operations under various conditions.

Emergency Operation

Procedures for emergency operation scenarios.

Control Outline

Indoor Unit Control

Control outlines and specifications for the indoor unit.

Applied Control and Functions (including Circuit Configuration)

Details on applied control functions and circuit configurations.

Applied Control and Functions (including Circuit Configuration)

Indoor Controller Block Diagram

Block diagram of the indoor controller.

Applied Control of Outdoor Unit

Specific applied control functions for outdoor units.

Indoor Printed Circuit Board

Test Operation of Indoor Unit

Check function for operation of indoor unit (Functions at indoor unit side)

Procedure to check indoor unit operation independently.

Method to Set Indoor Unit Function DN Code

Procedure> To be performed only when system at rest

Procedure for setting indoor unit function DN codes when the system is at rest.

Applied control for Outdoor Unit

Outdoor Fan High Static Pressure Shift

Function to adjust outdoor fan speed for high static pressure applications.

Priority Operation Mode Setting

Settings to establish priority for cooling or heating modes.

Applied Control of Outdoor Unit

Power peak-cut Control (Standard)

Standard method for limiting peak power consumption.

Power peak-cut Control (Extended)

Extended method for limiting peak power consumption.

Snowfall Fan Control

Control function for fan operation during snowfall.

TEST OPERATION

Procedure and Summary of Test Operation

Overview and procedure for test operations.

Check Items before Test Operation (before powering-on)

Essential pre-power-on checks for test operations.

Address Setup

Procedure for setting unit addresses and system configuration.

Troubleshooting in Test Operation

Troubleshooting guide for issues encountered during test operations.

Test Operation Check

Fan Check

Procedure for checking the fan operation during test mode.

Cooling;Heating Test Operation Check

Procedure for checking cooling and heating operations during test mode.

Service Support Function

Check Function for Connecting of Refrigerant and Control Lines

Function to check the correct connection of refrigerant and control lines.

Function to Start;Stop (ON;OFF) Indoor Unit from Outdoor Unit

Function to start/stop indoor units from the outdoor unit.

Error Clearing Function

Procedure for clearing errors from the system.

Remote Controller Distinction Function

Function to distinguish connected remote controllers.

TROUBLESHOOTING

Overview

General overview of troubleshooting procedures and required tools.

Troubleshooting Method

Detailed troubleshooting methods based on check codes.

Troubleshooting Based on Information Displayed on Remote Controller

Troubleshooting based on error codes displayed on the remote controller.

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

Cross-reference of check codes across different displays and fault locations.

BACKUP OPERATION (EMERGENCY OPERATION)

Note for Backup Operation

Important notes and guidelines for backup operation.

Compressor Backup Operation Setting

Procedure for setting up compressor backup operation.

Outdoor Unit Backup Operation Setting

Procedure for setting up outdoor unit backup operation.

OUTDOOR UNIT REFRIGERANT RECOVERY METHOD

Refrigerant Recovery from Failed Outdoor Unit (Pump-Down)

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

How to Operate System While Failed Outdoor Unit Being Repaired

Procedure for operating the system while a failed outdoor unit is under repair.

REPLACING COMPRESSORS

Compressor Replacement Procedure (Outline)

General outline for compressor replacement.

Replacement of Compressors

Detailed procedure for replacing compressors, including oil adjustment.

OUTDOOR UNIT PARTS REPLACEMENT METHODS

P.C. BOARD EXCHANGE PROCEDURES

Procedures for exchanging PC boards.

P.C. BOARD EXCHANGE PROCEDURES

Replacement of Indoor P.C. Boards

Procedure for replacing indoor PC boards.

Replacement of Outdoor P.C. Boards

Procedures for replacing outdoor PC boards.

EXPLODED DIAGRAM;PARTS PRICE LIST

WARNINGS ON REFRIGERANT LEAKAGE

Check of Concentration Limit

Information on concentration limits for R410A refrigerant and necessary safety measures.

Toshiba MMY-MAP0804HT8(Z)(ZG)-E Specifications

General IconGeneral
BrandToshiba
ModelMMY-MAP0804HT8(Z)(ZG)-E
CategoryAir Conditioner
LanguageEnglish

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