Toshiba MMY-MAP1204 Series User Manual (English)

Questions and Answers:

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erichughesAug 18, 2025
What to do if a check code is displayed on my Toshiba MMY-MAP1204 Air Conditioner's remote controller?
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  Donald ProctorAug 18, 2025
  If a check code appears on your Toshiba Air Conditioner remote, it could be due to several reasons. Here's what you can check: * Ensure the outdoor unit power is on. * There might be an address setup error. In this case, set up the address again. * The number or capacity of connected indoor units may be exceeded; adjust accordingly. * Communication between outdoor units might have stopped, so check the number of connected outdoor units and their power status.
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Mike SmithAug 20, 2025
Why does my Toshiba MMY-MAP1204 display a check code related to address setup errors?
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  Lauren FergusonAug 21, 2025
  A check code on your Toshiba Air Conditioner related to address setup errors can occur for several reasons: * Undefined line addresses of connected indoor units. * Mismatch between the outdoor line address and indoor unit line addresses. * Duplicated indoor addresses. * Missing header unit setup in group control. To resolve this, set up the address again.
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bmortonAug 23, 2025
How to fix a Toshiba MMY-MAP1204 Air Conditioner check code caused by duplicated indoor addresses?
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  Laura LevineAug 23, 2025
  If your Toshiba Air Conditioner displays a check code due to duplicated indoor addresses, the solution is to set up the address again. This will ensure each unit has a unique address.
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Cynthia YoungAug 25, 2025
What should I do if my Toshiba Air Conditioner shows a check code and I suspect a transmission circuit error?
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  Lacey WilliamsAug 26, 2025
  If you suspect a transmission circuit error (PC board failure) is causing a check code on your Toshiba Air Conditioner, replace the interface PC board.
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williamskaylaAug 27, 2025
Why is my Toshiba MMY-MAP1204 showing a check code after address setup?
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  wilkersonjasonAug 27, 2025
  A check code appearing after address setup on your Toshiba Air Conditioner could indicate interrupted communication from all indoor units. Check for disconnection of the indoor/outdoor communication line (between the header unit and the leading indoor unit) and investigate potential communication noise.
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Vanessa PaulAug 30, 2025
What to do if my Toshiba Air Conditioner displays a check code due to outdoor unit communication issues?
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  Pamela MaldonadoAug 30, 2025
  If your Toshiba Air Conditioner displays a check code related to communication between outdoor units, verify the number of connected outdoor units and ensure that their power is on.
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Michael LewisSep 1, 2025
How to resolve a Toshiba MMY-MAP1204 check code caused by duplicated outdoor addresses?
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  Danny DominguezSep 1, 2025
  If a check code on your Toshiba Air Conditioner is caused by duplicated outdoor addresses, avoid using manual setup for outdoor addresses.
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Laura PopeSep 3, 2025
What does it mean if my Toshiba MMY-MAP1204 Air Conditioner displays a check code because the number of connected outdoor units has decreased?
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  Laura McdonaldSep 3, 2025
  If your Toshiba Air Conditioner shows a check code because the number of connected outdoor units has decreased, it might be due to installing an outdoor backup or the power of a follower unit not being turned on. Correct the cause of the error. If it occurs when installing a backup, clear the error after setup finishes. If the power of a follower unit is not turned on, turn it on.
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Angela BellSep 6, 2025
How do I fix a Toshiba MMY-MAP1204 check code related to duplicated outdoor line addresses?
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  tyler28Sep 6, 2025
  To fix a check code on your Toshiba Air Conditioner caused by duplicated outdoor line addresses or a line address setup error (occurred after connection between U1/U2 and U3/U4 connectors), modify the line address setup of the header unit between lines by setting up SW13 and SW14 on the interface PC board.
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Melinda ConradSep 8, 2025
What to do if my Toshiba MMY-MAP1204 shows a check code due to duplication of indoor units with priority?
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  Michael WilliamsSep 8, 2025
  If your Toshiba Air Conditioner displays a check code due to duplication of indoor units with priority, set up priority for only one indoor unit.