1、 The chiller does not start, and the indicator does not light up (1)The voltage is not normal Check the power supply and confirm the three-phase balance (2) Fuse blown Replace fuse (3)Transformer burnt out Replace the transformer or change the power supply to three-phase four wire
2、 The compressor runs continuously but the cooling capacity is insufficient (1)Overload Reduce load (2) Abnormal cooling water circulation Check the temperature of the radiator and whether the pressure radiator tower and circulating water pump operate normally (3)The condenser is not clean or the fan is damaged Clean the condenser or replace the fan (4) Insufficient cold water flow Check whether the water pump is blocked or stops operation. Add a bypass circuit to increase the cold water flow (5) Evaporator icing Discharge the cold water, open the make-up water, and start the water pump to circulate continuously until the evaporator is defrosted
3、 The compressor overload lamp is on (1)The voltage is not normal Check the power supply and confirm the three-phase balance (2)Overload operation of compressor Reduce load (3)Abnormal cooling water circulation Check the temperature and pressure of cooling water, water tower and water pump for normal operation (4)Compressor fault Check the compressor and replace it if necessary After maintenance, press the reset system to operate the chiller again
4、 Water pump overload lamp is on (1)The voltage is not normal Check the power supply and confirm the three-phase balance (2)Water pump impeller is blocked Clean the water pump and replace the whole pump if necessary (3) Water pump motor failure Check the bearing and coil, and replace the whole water pump if necessary After maintenance, press the reset system to operate the chiller again
5、 Fan overload light is on (1)The voltage is not normal Check the power supply and confirm the three-phase balance (2) Fan motor fault Check the bearing and coil, and replace the whole fan if necessary After maintenance, press the reset system to operate the chiller again
6、 High/low voltage fault lamp is on (1)The condenser is not cleaned or the fan is damaged Clean the condenser or replace the fan (2)The cooling water circulating system is normal Check the temperature and pressure of cooling water and whether the water pump of water tower operates normally (3)Overload Reduce load After maintenance, press the reset system to operate the chiller again
7、 The compressor continues to operate but cannot cool (1)Insufficient cold water flow leads to low refrigerant pressure Check whether the water pump is blocked or stops operation. Add bypass circuit to increase water flow (2)Refrigerant leakage leads to low pressure Close the inlet and outlet valves of cooling water and cold water, discharge the remaining refrigerant, add high-pressure nitrogen () to test for leakage, find out the leakage position, vacuum after repair, add refrigerant, and open the inlet and outlet valves of cooling water and cold water (3)Expansion valve or filter blocked Discharge all refrigerant, replace expansion valve or filter, vacuum and add refrigerant
8、 The cooling water flow fault lamp is on (1) The cooling water flow is blocked Check whether the valves between cooling water are closed or blocked by sundries (2)Insufficient cooling water flow Check whether the water pump is blocked or stops operation
9、 Chilled water flow fault lamp is on (1)Blocked chilled water flow Check whether the valves between the chilled water flows are closed or blocked by sundries (2)Insufficient chilled water flow Check whether the water pump is blocked or stopped
10、 The water pump starts, but the compressor does not start, and the indicator light does not light up (1)Time system failure Check whether the electronic board or timing system is loose or damaged, and replace the whole board if necessary (2)The magnetic switch of compressor is burnt out Replace the magnetic switch system (3)Failure of temperature control meter or thermocouple Replace the temperature control meter or thermocouple (4)Compressor fault Check the compressor and replace the whole compressor if necessary