Error code P4/P5
Summary:
Low-pressure switch protection for system A/B
Possible Cause:
- Indoor unit motor stopped abnormally/poor heat exchanger
- EEV/filter drier/indoor coil blocked
- Under charged
Troubleshooting:
- If the low-pressure switch fails - replace the switch
- If under charge - Adjust refrigerant charge
- If there is poor heat exchange - correct it
- If there is a blockage - correct it
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.