Kitchen Aid fridge KFIV29PCMS03

[wader072174]

Hello,

I had a storm knock out my kitchen aid fridge compressor/inverter board. I replaced them together as compressor comes with new inverter board. I was wondering if anyone had experience with charging these units. The low side pressure is going from 20psi to a 20 vacuum throughout. My experience with traditional compressors is to charge to a 5psi low side and be done. Does anyone know what psi these inverter compressors usually run at? Any help would be greatly appreciated.

Thanks

Rick

[Richard Demint]

Stop! You can not charge these systems by psi. You must weigh in the exact charge. well that is if you do not want to have issues like you are having. Is it a dual evaporator unit? different steps if thats the case. You change out filter drier? When correctly done and after an hour or so the low side should read just about 0psi, Any higher compressor not efficient, if your pulling down to -20 vaccum on your gauges then that would indicate a restriction. Remember the filter drier, if you did replace it which you most definitely should have  your capillary may have gotten brazed shut.

[wader072174]

Thanks for getting back to me. Yes this is a dual evaporator unit. The unit had been running for around three hours and I have a low side pressure of about 2 psi. And a freezer temp of 13 degrees and dropping very slowly. I completely get what you are saying about exact change. (These aren’t your grandpas compressors anymore.) Hoping I nailed charge based on luck and playing with charge. Won’t be doing this again! 

[Richard Demint]

on a dual evap unit there is a 3 way valve that needs to be in the home position(open to both evaps) before you can fully pull a vaccum. I always pull from low and high side. Follow these and you will get all moisture out of system and all should be good.

[Royal]

Frost on half of the EVAP coil...not freezing food..compressor hot to the touch