Mmy-map1004ft8-e Service Manual — Toshiba

Blocked outdoor heat exchanger; overcharged refrigerant; failed outdoor fan motor.

By manipulating SW01 and SW02, you can read sensor temperatures and operating frequencies directly from the screen without Gauges: Compressor 1 Current (Amperes) [1] [2]: Compressor Inverter Frequency (Hz) [2] [1]: Discharge Temperature (TD1) [2] [3]: Suction Temperature (TS) [3] [1]: High Pressure Sensor Reading (Pd in MPa) [3] [2]: Low Pressure Sensor Reading (Ps in MPa) Troubleshooting and Error Code Matrix

Maximum pipe lengths and height differences (between indoor and outdoor units) must be respected. Refrigerant Type: R410A. toshiba mmy-map1004ft8-e service manual

Discharge thermistor senses temperatures exceeding safe limits (typically >115°C).

: Compressor breakdown or inverter circuit fault. Test the resistance of the compressor windings. which affects the wiring diagram. C.

Working with commercial HVAC equipment like the MMY-MAP1004FT8-E poses significant risks. The system uses high voltage, heavy components, and high-pressure refrigerant (R410A). Therefore, all installation, maintenance, and repair work must be performed by a – a person specifically trained and authorized by Toshiba Carrier Corporation. Key safety guidelines include:

The inverter board detects abnormal current spikes. and high-pressure refrigerant (R410A). Therefore

To verify component health during a service call, technicians must measure sensor resistance against the temperature charts provided in the manual. Thermistor Resistance Checks

The manual also lists error history retrieval using the 7-segment display (LEDs on the main board). Press SW01 for 5 seconds to cycle through the last 10 faults.

Some variants include a passive filter in the fan driving circuit, which affects the wiring diagram. C. Wiring Diagrams