Description
The UUODC controller has detected low refrigerant pressure for the operating conditions.
Expected Operation
If the event occurs within the same call 3 times, the system will switch from an Alert to an Alarm and lock the unit out for 4 hours.
Cause
1. Too little refrigerant in the system.
2. Leak or under-charging.
Solution
Check refrigerant charge - compare pressure readings to published values for the unit at the current ambient temp. Adjust refrigerant charge level as necessary.