Check indoor drain pan for blockages. Inspect the condensate lift pump operation. TD Sensor (Discharge Temp) Error
Avoiding areas with excessive oil, steam, sulfurous gas, or high salinity. Refrigerant Piping and Handling toshiba mmymap1404ft8e service manual
The service manual for this series (often documented under the or SMMS-i engineering data) includes: Check indoor drain pan for blockages
Before replacing an expensive inverter PCB due to overcurrent errors, use a digital multimeter in to verify the state of the internal output diodes: toshiba mmymap1404ft8e service manual
Specific procedures to pressure test with nitrogen.
Take voltage readings across all three phases under full compressor load; phase imbalance must not exceed 2%. Mechanical & Refrigerant Inspection
