COMPONENT/SYSTEM DO’S DON’TS AC gas Leakage test Use nitrogen gas for pressure leak test before AC gas filling at assembly line. Don’t use compressed air from ambient for leakage test. Fill the nitrogen gas from both port (Suction line and liquid line) for leakage test. Ensure vacuuming is done from both port (Suction line and Liquid Line). Software version Ensure appropriate FATC software version in available vehicle as per the corresponding variants. Electrical hardware and connections Ensure HV and LV connections of compressor and PTC heater are properly connected. Do not reverse the polarity of LV/ HV wiring port for EV compressor. FATC 37
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