Error Code EF
Summary:
External device protection
Possible Cause:
- The external device is abnormal
Trobleshooting:
- If the wire of external device protector is open: (Correct the connection)
- If the external device is broken: (Replace the external device)
- If both have been verified and are okay: (Replace the Main Board)
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.