Description
The UODC controller has detected high refrigerant pressure and has reduced the compressor speed to compensate.
Expected Operation
If fault occurs 3 times in one call, unit will lockout and require manual reset.
Cause
The refrigerant is overcharged or extreme heat conditions.
Solution
1. Wait until ambient air temperature has cooled below 90F and confirm if problem persists.
2. If problem persists at ambient temps below 90F, check refrigerant charge and confirm pressures are correct per published values for the given ambient air temp.
3. If problem persists, replace inverter drive controller.