81
Mitsubishi Heavy
Mitsubishi Heavy air conditioner error 81
Meaning
Vent-pipe sensor error (abnormal stop)
Models
SRC25QA-S, SRC35QA-S, SRK25QA-S, SRK35QA-S
Meaning
Discharge pipe sensor is abnormal (anomalous stop)
Models
SRK25ZJP-S, SRK35ZJP-S, SRK50ZJP-S
How the unit shows it
- RUN light (10's digit): 8 time flash
- TIMER light (1's digit): 1 time flash
- Error display: ◯ (4 times)
- RUN lamp (tens place): Flash 8 times
Causes and how to check
- 2 possible causes
- the cited manual page, and follow-up questions
No account needed to look up codes.
Guides
- 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.