I have a YPAL050CVC46BBCX. It has a tranducer package on 1 circuit only. The problem I'm seeing is the alarm led is lit and the pressures on the display are ???. Checked the transducers and got 3.5 vdc on the suction and 1.8 vdc on the discharge. Sometimes after cycling the power the pressure will display properly-then go back to ???. I'm thinking the MOD-UNT board is going bad. Circuit 1 is cooling properly. Has anybody seen this? Any help greatly appreciated.

Coolairman