How to troubleshoot industrial freezer?

shape   state

original   because

Troubleshooting

Normal power

The whole machine can't run

1     Fuse blown

2 reverse relay failure

1     Replace the spare fuse

2 Replace the reverse relay

Power switch trip

1 power supply line is grounded or shorted

2 compressor, pump, motor fault ground

1     New treatment

2 After inspection, if it is determined that the fault, replacement or repair

Reverse phase

1     Pump, compressor and fan reversal

2 lack of phase

1Switch any two phases in the power phase line

2 Use a multimeter to measure whether the three-phase power supply is normal. Check if the power cable is broken.

Poor heat dissipation

Fault indicator is on

1 high voltage switch trip

2 high voltage switch is damaged

1 clean the condenser, air retention 40 °C In the following, please follow the note <1>

2 Replace the new pressure switch

Insufficient refrigerant

Fault indicator is on

1 refrigerant is not enough to escape from low pressure
2 evaporator icing

3 thermostat is not allowed or the sensor is malfunctioning

Note â‘  by <two> Processing

2 Check whether the expansion tank is out of water, whether the circulating pump is running, and after resetting, manually reset the low pressure switch or shut down and restart;

3 If the evaporator freezes, please drain the ice water and add warm water to dissolve the ice.

4 Replace or repair.

Note: It is not possible to hit the ice with a hard object, such as breaking through the copper pipe, which will damage the compressor.

overload

Fault indicator is on

1 voltage is abnormal;

2 The motor, pump, and compressor shaft are damaged;

3 poor heat dissipation

4 overload relay is too small or the adjustment value is too low;

5 line contact is bad or loose

1 Three-phase power supply voltage drop or voltage instability and phase loss, please adjust the voltage and check the cause of the missing phase;

2 Replace the new shaft or replace it;

3 Please follow the note < 1 > ;

4 change to large or increase according to normal values;

5 lock

The fault indication is not lit but the compressor is not working

Protection device

Please follow note 4

Ice sink water is not cold

Or low pressure trip

1 insufficient capacity;

2 insufficient refrigerant;

3 refrigerant blocking;

4 valve rupture;

5The temperature switch setting is too high;

6 temperature switch failure;

7 poor heat dissipation

8 sensor failure

1 increase the host capacity;

2 Processing according to Note < 3 > ;

3 Replace the blocking part such as desiccant or expansion valve vacuum treatment and refill the refrigerant;

4 Replace the compressor, judged by the note < 3 > ;

5 lower the temperature;

6 new;

7 low efficiency, please follow the note <1>;

8 replacement new

Water shortage

Inadequate water flow

1 The water in the water tank is insufficient;

2 pipe water flow is too small

1 add water to the water tank;

2 check whether each valve is open to Zui