Bad refrigeration control relay. Test relay using relay test function of the electronic controller.
Replace relay if necessary.
Both compressor and condenser fan motors
will not operate.
Bad connection at power board. Check wiring connections. Make corrections if necessary.
Loss of refrigerant Replace the refrigeration unit.
Smashed tubings Replace the refer unit.
Defective drainage Make sure the drain hose is not kinked or clogged. Re-install hose
correctly if kinked or clogged.
Defective temperature sensor Replace the temperature sensor.
Defective control board Replace the board.
Evaporator frosted over.
Poor sealing Check gasket, vend flap, and permagum on the bulkhead.
Temperature setting too low. Adjust set point in control board.
Defective temperature sensor Replace the temperature sensor.
Product freezing up (too cold).
Defective control board Replace the control board.
Fan blade hitting shroud or transformation or loose
fitting
Replace the fan blade or re-install correctly.
From the inside of fan motor or loose fitting Re-install or replace the motor.
Excessive noise.
From the inside of compressor or loose fitting Replace the refrigeration unit.
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