That is the only thing that has annoyed me with my Waeco. I had a recurring problem that the error lights showed up as either a failure of the motor control board or the compressor. I took it in three times however it faulted many times during trips initially.
First time they said they found no fault. Second time they replaced the motor control board and the power lead. Third time they found it had been over gassed so was too high a pressure in the system. Has been fine ever since the gas pressure/volume has been corrected.
A different place/repairer each time as each time the previous repairer was no longer an authorised Waeco repairer.
So all that time and it wasn't even faulty parts.

