When we use the chiller, we will encounter some problems more or less, then how to understand the cause of these faults, and then quickly eliminate it, this is an empirical problem, Shanghai Tianfeng technical engineer in the long run During the chiller maintenance process, some common chiller malfunctions and their troubleshooting methods were summarized. I hope I can help some friends.
malfunction | Possible Causes | Method of exclusion | The unit can't start or
Stop immediately after startup | 1 power supply is off or the voltage is too low | 1 Eliminate circuit failures and supply power according to unit requirements | 2 set temperature tune properly, so normally open contacts | 2Re -adjust the temperature control set value | 3 cooling water is not open, the interlock circuit is disconnected | 3 open the cooling water system, turn on the interlock circuit | 4 protection device does not reset after action | 4 press the stop button before turning on power. | High pressure is too high during unit operation | 1The cooling water flow is too low or the water temperature is too high | 1 increase the cooling water flow or reduce the water temperature | 2 condenser copper tube / fins more fouling, poor heat transfer | 2 cleaning heat exchanger | 3 too much refrigerant | 3 discharge part of the refrigerant | 4 expansion valve opening degree is too small | 4 appropriate adjustment of the expansion valve opening degree | Low pressure is too low when the unit is running | 1 insufficient refrigerant | 1 trapping, replenishing refrigerant or adjusting expansion valve | 2 filter blocked | 2 cleaning or replacing the filter | 3 expansion valve opening degree is too small | 3 properly adjust the expansion valve opening degree | | 4 cleaning or replacing the capillary | 4 capillary blockage | | Return air pipe and compressor casing frosting | 1 expansion valve opening degree is too large | 1 adjust the expansion valve | 2 too much refrigerant | 2 discharge part of the refrigerant | 3 heat load is too small | 3 increase the heat load or open the bypass circuit of the frozen water circuit | The frozen water pump does not produce water | 1 pump steering reverse | 1 correct pump motor steering | 2 impeller blockage | 2 cleaning pump impeller | Insufficient flow of frozen water pump | 1 impeller or water pipe blocked | 1 cleaning the impeller or water pump | 2 impeller damage | 2 replacement of the impeller |
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Guangzhou Shiyi Industrial Equipment Co., Ltd.
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