122 PB
COMPONENTS TESTING
EEV Stepper Coil
Discharge pipe temperature is too high. This means the compressor is over heating and will shut down and lock itself out. The
cause for this issue is lack of refrigerant coming back to the compressor to cool the compressor. The main causes of this would be
low charge, restriction or issue with the electronic expansion valve (EEV).
Check Resistence of EEV stepper coil.
Using an ohmmeter check all wires against each other.
5 wire EEV
Grey to all colors is 45 +/‑ 10%
All other colors to each other are 95 +/‑ 10%
Remove the head off the EEV (pulls right off) & check for any rust build up. If there is any rust inside the EEV head, replace the EEV
head. If there is rust on the EEV body you can clean it up with some emery cloth.
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