Compressor HVAC: Testing and Inspection
INSPECTION1. INSPECT MAGNETIC CLUTCH CLEARANCE
a. Set the dial indicator to the magnetic clutch hub.
b. Connect the battery positive lead to terminal 1 of magnetic clutch connector and the negative lead the earth wire. Turn on and off the magnetic clutch and measure the clearance.
Standard clearance: 0.35 to 0.60 mm (0.013 to 0.023 in.)
If the measured value is out of the standard range, remove the magnetic clutch hub and adjust it with the magnetic clutch washers.
NOTE: Adjustment shall be performed with 3 or less magnetic clutch washers.
2. INSPECT COMPRESSOR OIL
a. When replacing the compressor and magnetic clutch with a new one, after gradually removing the refrigerant gas from the service valve, drain the following amount of oil from the new compressor and magnetic clutch before installation.
Standard:
(Oil capacity inside new compressor and magnetic clutch: 120 + 15 cc (4.0 + 0.5 fl. oz.)) - (Remaining oil amount in the removed compressor and magnetic clutch) = (Oil amount to be removed when replacing)
NOTE:
- When checking the compressor oil level, observe the precautions on the cooler removal/installation.
- Because compressor oil remains in the pipes of the vehicle, if a new compressor and magnetic clutch is installed without removing some oil inside, the oil amount becomes excessive, preventing heat exchange in the refrigerant cycle and causing refrigerant failure.
- If the remaining oil in the removed compressor and magnetic clutch is too small in volume, check for oil leakage.
- Be sure to use ND-OIL8 for compressor oil.