Advanced Troubleshooting; Evaporator Coil Is Freezing; High Pressure Switch Keeps Tripping; Unit Cycles On And Off More Than 8 Times/Hr - Wine Guardian DP25 Installation, Operation And Maintenance Manual

Advanced Troubleshooting

This section is intended for qualified refrigeration service technicians only.
The technician should repeat all of the previous troubleshooting steps before taking action on these

Evaporator coil is freezing

Possible Cause
Charge too low
TXV malfunctioning

High pressure switch keeps tripping

Even After Checking for Obstructions and Dirty Filters/Coils
Possible Cause
Condenser fan not operating
Defective switch

Unit cycles on and off more than 8 times/hr

Possible Cause
Thermostat malfunctioning
Low suction pressure

High pitched or loud rubbing noise, clanking or vibration

Possible Cause
Fans loose or malfunctioning
Excessive compressor vibration
TXV malfunctioning

Replacing the blowers

NOTE: When replacing the fan or motor, replace the fan and motor as a unit.
Do not remove the motor from the impeller wheel.
IMPORTANT
more technical solutions.
Solution
Check for leaks
Add refrigerant
Repair or replace
Solution
Repair or replace
Replace
Solution
Check the thermostat guide for
thermostat information
Check low pressure switch
Check pressure and adjust superheat
Solution
Repair or replace
Replace
Repair or replace
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