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Toshiba MMY-MAP1204T8(J)P-E - User Manual

Toshiba MMY-MAP1204T8(J)P-E
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SERVICE MANUAL
AIR-CONDITIONER (MULTI TYPE)
<SUPER MODULAR MULTI SYSTEM - i>
Outdoor Unit
Model name:
FILE NO. SVM-13024-8
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
This service manual provides relevant explanations about new outdoor unit (SMMS-i).
Please refer to the following service manuals for each indoor units.
MMY-MAP0804HT7P-K
MMY-MAP1004HT7P-K
MMY-MAP1004HT7P-K1
MMY-MAP1204HT7P-K
MMY-MAP1404HT7P-K
MMY-MAP1604HT7P-K
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-MAP0804T8P-SG
MMY-MAP1004T8P-SG
MMY-MAP1204T8P-SG
MMY-MAP1404T8P-SG
MMY-MAP1604T8P-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
MMY-MAP0804T8(J)P-E
MMY-MAP1004T8(J)P-E
MMY-MAP1204T8(J)P-E
MMY-MAP1404T8(J)P-E
MMY-MAP1604T8(J)P-E

Table of Contents

Questions and Answers

  • M
    Michael WilsonAug 6, 2025
    What to do if the Toshiba MMY-MAP1204T8(J)P-E Air Conditioner indoor remote controller is not accepted and a check code is displayed?
    • E
      Elizabeth BarrAug 6, 2025
      If the indoor remote controller isn't working and a check code appears on the interface PC board of the header unit, the issue might stem from unset addresses or incorrect power settings. Start by setting up the addresses for the line and indoor units. If you're using group control, make sure a group address is set up. Also, confirm that the indoor unit power is turned on, ensuring you power on the indoor units before the outdoor units. Finally, check that the indoor/outdoor communication line is correctly connected to the U1/U2 terminal of the header unit.
  • J
    Jeffrey BassAug 16, 2025
    What to do if my Toshiba MMY-MAP1204T8(J)P-E Air Conditioner is not accepting operation from the indoor remote controller?
    • G
      gonzalezdebraAug 16, 2025
      If your Toshiba Air Conditioner indoor unit isn't responding to the remote controller and there's no check code on the header unit's interface PC board, the problem likely lies in the communication wiring or address settings. First, check the communication line between the indoor and outdoor units and modify the wiring if necessary. Next, ensure that both the line address and indoor address are correctly set for the unit that's not responding. If you are using indoor group control, make sure that the power of the header unit of the group is turned on. If the unit is under individual control, verify that the group address is set to “0”. Finally, confirm that the power is turned on for the unit and that the indoor remote controller is properly wired.
  • Q
    qhughesAug 27, 2025
    Why does my Toshiba MMY-MAP1204T8(J)P-E display a lower number of connected units after address setup?
    • A
      Alexis OdonnellAug 27, 2025
      If you're encountering a situation where a lower number of connected units is displayed after address setup, it might be due to miswiring or unconnected wires in the communication lines. * For outdoor units, check the communication lines between them. If you find any issues, correct the wiring, set up the addresses again, and then verify the number of connected outdoor units. * Similarly, inspect the communication lines between indoor units. Correct any miswiring, set up the addresses again, and check the number of connected indoor units. Also, verify the wiring of the indoor remote controller.
  • K
    Katie BeckNov 10, 2025
    What to do if my Toshiba MMY-MAP1204T8(J)P-E Air Conditioner isn't responding to the remote but there's no check code?
    • E
      emma11Nov 10, 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...
  • K
    Katherine RodriguezNov 20, 2025
    Why does my Toshiba Air Conditioner show fewer connected units than expected after address setup?
    • J
      Jessica BakerNov 20, 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...
  • B
    Brandon CharlesDec 1, 2025
    Why does my Toshiba MMY-MAP1204T8(J)P-E remote controller display a check code?
    • G
      Glenn HortonDec 1, 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...

Toshiba MMY-MAP1204T8(J)P-E Specifications

General IconGeneral
BrandToshiba
ModelMMY-MAP1204T8(J)P-E
CategoryAir Conditioner
LanguageEnglish

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