Toshiba Mmymap1404ft8e Service Manual Patched Jun 2026
Detailed schematics for both the outdoor unit power supply and the control wiring between indoor and outdoor units.
| Code | Description | Possible Cause | | :--- | :--- | :--- | | | Communication error between indoor/outdoor units | Wiring issue, P.C. board failure | | E08 | Duplication of indoor addresses | Two indoor units have the same address | | E16 | Capacity over | Total connected indoor units exceed the system's capacity | | E19 | Header error (Header is nothing or 2 or more header units) | Incorrectly set header unit(s) in a group or refrigerant line | | E25 | Duplication of outdoor addresses | Two outdoor units in the same network have the same address |
For the MMY-MAP1404FT8E operating as a standalone outdoor unit: Ø 15.9 mm (Brazed connection) Liquid Side Pipe: Ø 9.5 mm (Flare or brazed connection) Oil Balance Pipe
Measure between the negative DC terminal (-) and the three compressor outputs (U, V, W). toshiba mmymap1404ft8e service manual
: Toshiba provides a dedicated Fault Code Text Service at 07624 803 017 and a technical helpline at 0870 843 0333.
The service manual outlines a strict regimen for long-term reliability and legal compliance, including:
⚠️ Always wait at least 10 minutes after turning off the power before touching electrical components to allow capacitors to discharge. Detailed schematics for both the outdoor unit power
Ground the shield wire at the outdoor unit side only. Cut and isolate the shield at the final indoor unit to prevent ground loops. 3. Microcomputer Switch Settings and LED Displays
The current of the system (e.g., does it trip immediately, or run for a few minutes first?).
380V–415V, 3-Phase, 50Hz (L1, L2, L3, Neutral, and Earth Ground connection) Maximum Airflow Rate: Up to driven by dual inverter-controlled axial fans : Toshiba provides a dedicated Fault Code Text
A reading of 0V or open-circuit in both directions indicates a ruptured IGBT module. The inverter PCB must be replaced. Refrigerant Recovery and Charging
High-pressure switch has tripped. Check for blocked outdoor coils, failed outdoor fan motors, or an overcharge of R410A refrigerant.