Reversal of rotation in the evaporator fan: - Check and correct
- Reduced discharge pressure.
Insufficient thermal load: Check design conditions.
- Lack of refrigerant: Check and correct leaks. Add soda
if necessary.
- Low air flow in the evaporator: Check the air filters for dirt. Clean or replace.
- Check the coil for dirt: Clean and provide adequate filtration.
- Check pipeline network regulation records.
- Check engine operation: Replace if necessary.
- Insufficient refrigerant supply: Check the filter drier, evaporator distributor or lines for obstruction. Replace if necessary.
- Check the expansion valve for obstruction. Replace if necessary.
- Check the expansion valve overheat setting (4 to 6 ° C). Adjust if necessary.
- Check for excessive pressure loss in the refrigerant lines due to the distance, unevenness or diameter of the pipes. Correct if necessary.
- Check the position of the bulb and equalizer tube of the expansion valve. Correct according to factory specification.
- Low pressure switch tripped: - Check regulation and operation.
apparent cause. Replace if necessary.
