If the error codes F4 or EC 51 appear on your indoor unit, this indicates an outdoor EEPROM parameter error or a communication error between the outdoor main chip and the compressor drive chip.
Replacing the outdoor PCB board is required to fix the problem
To order a replacement part or to get further assistance in diagnosing your unit, please contact one of our support representatives by submitting a ticket using the link below.
*Please note these procedures must be performed by a certified HVAC contractor.
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article