Toshiba HFCR407C - [A0] Discharge Temp. Sensor (TD1) Short Circuit; [A2] Suction Temp. Sensor (TS) Short Circuit; [A1] Discharge Temp. Sensor (TD2) Short Circuit

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Check code Operation cause
[A0]
Discharge temp. sensor (TD1) short circuit TD1 sensor open/short
Open/short of TD1 sensor was detected. Check connector (TD1 sensor: CN502) and characteristics of sensor
resistance value.
When sensor is normal, replace interface PC board of the outdoor unit.
Check code Operation cause
[A1]
Discharge temp. sensor (TD2) short circuit TD2 sensor open/short
Open/short of TD2 sensor was detected. Check connector (TD2 sensor: CN503) and characteristics of sensor
resistance value.
When sensor is normal, replace interface PC board of the outdoor unit.
Check code Operation cause
[A2]
Suction temp. sensor (TS) short circuit TS1 sensor open/short
Open/short of TS1 sensor was detected. Check connector (TS1 sensor: CN504) and characteristics of sensor
resistance value.
When sensor is normal, replace interface PC board of the outdoor unit.
Troubleshooting
Diagnostic procedure for check code
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