On Daikin air conditioners, error code U0 means: Refrigerant shortage or leak. No. Switch the unit off at the breaker and call an authorised technician. Running it can damage the compressor.
Can I keep using the air conditioner?
No. Switch the unit off at the breaker and call an authorised technician. Running it can damage the compressor.
Common causes
- Refrigerant leak or incorrect refrigerant charge
- Installation fault: wiring, unit combination or pipework
How to fix it
- Switch the unit off at the breaker for about 5 minutes, then switch it back on
- If it appeared right after installation, ask your installer to check the wiring and setup
- If the code returns, contact an authorised AC technician; don't open the unit yourself
Frequently asked questions
What does Daikin error U0 mean?
On Daikin air conditioners, error code U0 means: Refrigerant shortage or leak.
How do I fix Daikin error U0?
Start with these steps: Switch the unit off at the breaker for about 5 minutes, then switch it back on; If it appeared right after installation, ask your installer to check the wiring and setup; If the code returns, contact an authorised AC technician; don't open the unit yourself.
Can I keep using the air conditioner with error U0?
Severity: High. No. Switch the unit off at the breaker and call an authorised technician. Running it can damage the compressor.