mitzi electric odd fault

[tait71]

hi got called out to a hospital server room today with 2x floor mount mitsi connected to 2x PUY-P250YGM-A outdoors these units are completely separate with no central control just local controls, the room went high temp both units had a 1302 fault high pressure the hospital engineers reset the units at each controller the units run fine, all voltage fine (3ph). each unit is fed from a seprate db but the power originates from the same mini substation, im thinking power blip causing condenser fan to stop compressor to carry on running. you thoughts or idears would be greatly appreciated. thank you

[Harry Trafford]

Ive never seen it happen that the fans stop but compressor continues running. I take it the outdoors have adequite air flow?

[Asbolute]

I'm thinking the unit must be cooling only so i'd check outdoor coil condition, outdoor fan motor and outdoor solenoid coils for outdoor HEX (see service manual). Forget your electrical blip theory!!

[kanchi]

While not in the model, I have replaced the pressure sensor many times.

[install monkey]

not roofers sticking sheets of insulation in front of em?