Common issues with chillers typically include the following five:

Fault 1: Insufficient flow in the refrigeration pump

The primary causes of insufficient traffic: 1) Impeller or pipe blockage 2) Impeller damage

Solutions: 1) Clean the impeller or pump 2) Replace the impeller 3) Replace the pump

Fault 2: Frost on the intake pipe and compressor housing.

The main reasons for frosting on the return air pipe and compressor casing of the cooling unit are: 1) the expansion valve is opened too wide, and 2) there is an excessive amount of refrigerant.

3). Insufficient heat load

Solution: 1) Adjust the expansion valve's b discharge section to release more refrigerant; 2) Increase the heat load or open the bypass valve of the chilled water circuit.

Fault 3): Frozen Water Pump Not Delivering Water: The primary reason for a frozen water pump not delivering water in a chilled water unit is

Fault 3: Low pressure during operation of the chilled water unit.

Low pressure occurring is primarily caused by the following reasons:

1). A lack of refrigerant only requires leak repair, refilling refrigerant, or adjusting the expansion valve.

2). Filter Clogging: This requires cleaning or replacing the filter.

3). The expansion valve is opened too little; adjust the expansion valve opening appropriately.

4). Cooled water machine capillary tube (expansion valve and desiccant filter) clogging can be resolved by simply cleaning or replacing the capillary tube (expansion valve and desiccant filter).

Fault 4: Chiller unit fails to start or shuts down immediately after startup:

The fault usually occurs due to

1) In the event of power outages or low voltage, simply ensure the circuit is free of faults and supply power according to the cold water generator's requirements.

2) Incorrect temperature controller settings caused the contacts to remain open; simply re-adjust the temperature control setting values.

Cooling water is not activated, and the interlock circuit is disconnected. At this point, simply open the cooling system and reconnect the interlock circuit.

4) Device protection has not been reset after activation; press the shutdown button once before restarting.

Fault 5: High Pressure During Operation of Chiller Unit: High pressure during operation is typically due to...

1) If there is insufficient coolant flow or the water temperature is too high, simply increase the coolant flow or lower the water temperature will suffice.

(2) The condenser copper tubes/finned coils are heavily soiled, resulting in poor heat exchange efficiency. This is when it's necessary to clean the heat exchanger of the chilled water unit.

3) Excessive Refrigerant: When there is an excess of refrigerant, some of it needs to be discharged.

(4) The expansion valve opening is too small; simply adjust the expansion valve opening to an appropriate degree.