Toshiba air conditioner error 1C
Meaning
Compressor case thermostat error
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
Meaning
Gas pipe (unit B) temperature sensor (TGb) error
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
Meaning
Gas pipe (unit A) temperature sensor (TGa) error
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
Meaning
Compressor system error
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
Meaning
Gas pipe (unit C) temperature sensor (TGc) error — PMV error (SH20) — PMV error (SH-8)
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
Meaning
Communication error between MCU
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
Meaning
Case thermo operation, Power supply error
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
Meaning
Room gas side temperature sensor error (TGa, TGb, TGc) and MCU communication error. The LED pattern identifies the sub-fault, and the procedure varies by sub-fault
Models
Heat pump RAS-3M18G3AVG-E, RAS-2M18G3AVG-E
How the unit shows it
- Outdoor LED display: *●●●●○
- LED display (A room gas side temp. sensor TGa error): *○
- LED display (B room gas side temp. sensor TGb error): *●●●○*○
- LED display (C room gas side temp. sensor TGc error): *●●○*○
Causes and how to check
- 7 possible causes
- 7 checks in order
- the repair procedure printed in the service manual
- the cited manual page, and follow-up questions
No account needed to look up codes.
Guides
- Communication error between indoor and outdoor unit: what to check, in which order
Communication (transmission) error codes usually come from the connecting wire, the supply or a board. The checks from easy to hard. - Checking an air conditioner temperature sensor (thermistor)
How to check the room, coil or discharge sensor when the unit reports a sensor error: measure its resistance and compare with the exact model's table. - Pressure, low refrigerant and high discharge temperature errors: where to start
Pressure and discharge-temperature protection codes: tell a low charge from a blockage or poor heat rejection before charging.