[A0] Discharge Temp. Sensor (Td1) Short Circuit; [A2] Suction Temp. Sensor (Ts) Short Circuit; [A1] Discharge Temp. Sensor (Td2) Short Circuit - Toshiba HFCR407C Service Manual

Check code
[A0]
Discharge temp. sensor (TD1) short circuit
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
[A1]
Discharge temp. sensor (TD2) short circuit
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
[A2]
Suction temp. sensor (TS) short circuit
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
Operation cause
TD1 sensor open/short
Operation cause
TD2 sensor open/short
Operation cause
TS1 sensor open/short
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