Daikin Mini Split Error Code F9: How to Fix It

Q: What does Daikin error code F9 mean?

Daikin error F9 indicates an oil pump abnormal condition, meaning the oil pump is not functioning properly. This can stop the compressor from operating to prevent damage.

Q: Can I run my Daikin mini split with error F9?

No, you should not run the unit with error F9 as it can damage the compressor. Turn off the system and troubleshoot the issue.

Q: How do I reset Daikin mini split error F9?

Turn off the system at the thermostat and disconnect power at the circuit breaker for 10 minutes. Restore power and turn on the unit. If the error persists, there is an underlying problem.

Q: Is it safe to replace the oil pump myself?

Replacing the oil pump involves handling refrigerant lines and electrical components. It is a complex task best left to a professional unless you have HVAC experience. Always disconnect power first.

Q: How much does it cost to fix Daikin error F9?

Professional repair typically costs between $300 and $800 depending on the issue (oil pump replacement, wiring repair). The oil pump part itself costs around $100-$200.

Abstract

Error code F9 on your Daikin mini split indicates an issue with the oil pump, which circulates oil to lubricate the compressor. This error often points to a faulty oil pump, low oil level, or a wiring problem. The system typically stops operation to prevent compressor damage.