Cabinet type air-cooled industrial chiller troubleshooting method

status

the reason

Troubleshooting

The power is normal and the whole machine cannot run.

1) Fuse fusion

2) Reverse relay malfunction or fall off

1) Replace the spare fuse

2) Reverse relay is reinserted or replaced

No fuse switch trip

1) The electrical load line is grounded or shorted.

2) Faulty grounding of compressor, water pump and motor

1) Renewal processing

2) After inspection, the station determines the fault, replaces or repairs

Reverse code (1)

1) Pump and fan reverse

2) Under-phase

1) Exchange any two phases in the power supply 2) Use an ammeter to measure whether the three-phase current is normal

Display compressor high pressure code (2, 5)

1) High voltage trip

2) High voltage switch failure

1) Clean the filter and keep the air below 40 °C. Please follow note 1

2) Replace the new <high ​​voltage trip automatic reset>, restart the compressor

Display compressor low pressure code (3,6)

1) The refrigerant is not enough to escape from low pressure

2) Evaporator icing

1) According to Note 2

2) Check if the expansion tank is out of water, and if the circulating water pump is running, after the normal operation, the low pressure will automatically reset and restart the compressor.

3) If the evaporator freezes, please drain the ice water, then add warm water to melt the ice.

4) Be careful not to hit the ice with hard objects, such as penetrating the copper pipe into the water, which will damage the compressor.

Display compressor overload code (4,7)

1) Voltage abnormality

2) Motor, water ocean, compressor bearing failure, stuck

3) Poor heat dissipation

4) The overload relay value is too low

5) The wiring contact is loose

1) 3-phase power supply voltage drop or voltage instability and under-phase repair

2) Replace the bearing or replace it

3) Please handle according to Note 1

4) Increase by normal

5) tighten the screws

The fault indicator is not lit and the compressor is not working.

Protection device

Please follow note 5

Ice sink water is not cold

Or low pressure trip

1) Capacity is not enough

2) Insufficient refrigerant

3) Refrigerant blocking

4) Valve rupture

5) The temperature switch setting is too high

6) Temperature switch failure

7) Poor heat dissipation

1) Increase host capacity

2) According to Note 3

3) Replace the blocking part such as desiccant or expansion valve air to refill the refrigerant

4) Replace the compressor and judge by Note 3

5) Lower down

6) New

7) Low efficiency, please handle according to Note 3