Toshiba HFC R407C User Manual

54
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: PJ1) 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: PJ2) 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: PJ3) and characteristics of sensor
resistance value.
When sensor is normal, replace interface PC board of the outdoor unit.
Check code Operation cause
[A4]
External air sensor (Tho) short circuit Tho sensor open/short
Open/short of Tho sensor was detected. Check connector (Tho sensor: PJ5) and characteristics of sensor
resistance value.
When sensor is normal, replace interface PC board of the outdoor unit.
Check code Operation cause
[A5]
Outdoor heat exchange sensor (TE) short circuit TE sensor open/short
Open/short of TE sensor was detected. Check connector (TE sensor: PJ4) and characteristics of sensor
resistance value.
When sensor is normal, replace interface PC board of the outdoor unit.
Troubleshooting
Diagnostic procedure for check code

Toshiba HFC R407C Specifications

General

Brand	Toshiba
Model	HFC R407C
Category	Air Conditioner
Language	English