24. SERVICE PROCEDURE 24.1.24 CHECK AND ADJUST AIR CONDITIONER CHECK LEVEL OF REFRIGERANT (GAS) The air conditioning system is equipped with pressure switches which disable the system if the pressure is too high or low, to prevent damage to the system. If the air conditioner fails to operate it may be due to: a) Low pressure i) Check for leaks. ii) Consult your distributor to recharge system. b) High pressure i) Check for blockages in piping. Check in off-season When not being used for a long period, operate the cooler for 3 to 5 minutes once a month to supply lubricant to each component of the compressor.
Inspection and maintenance items list for cooler PC450-ENG 3-43 WARNING If the liquid get into your eyes or on your hands, it may cause loss of sight or frostbite, so never loosen any part of the refrigerant circuit.
WARNING Inspection and maintenance items Contents Maintenance interval Refrigerant (gas) Filling quantity Twice a year; spring and autumn Condenser Clogging of fin Every 500 hours Compressor Function Every 4000 hours V belt Damage and tension Every 250 hours Blower motor and fan Function (Check for normal sound) When required Control mechanism Function (Check for function) When required Piping for connection Installation condition looseness of tightening connection portion gas leakage, damage When required