Wine Guardian Wine Cellar Cooling Systems 50Hz (WG 175) - Manual (Page 53)

Advanced Troubleshooting
IMPORTANT
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 MORE TECHNICAL SOLUTIONS.
Evaporator Coil is Freezing
Possible Cause Solution
Charge too low Check sight glass
Check for leaks
Add refrigerant
TXV malfunctioning Repair or replace
High Pressure Switch Keeps Tripping Even After Checking for
Obstructions and Dirty Filters/Coils
Possible Cause Solution
Condenser fan not operating Repair or replace
Defective switch Replace
Unit Cycles on and off more than 8 times/hr
Possible Cause Solution
Thermostat malfunctioning Check the thermostat guide for
thermostat information
Low suction pressure Check low pressure switch
Check pressure and adjust superheat
High Pitched or Loud Rubbing Noise, Clanking or Vibration
Possible Cause Solution
Fans loose or malfunctioning Repair or replace
Excessive compressor vibration Replace
TXV malfunctioning Repair or replace
Replacing the Blowers
When replacing the fan or motor, replace the fan and motor as a unit. Do
not remove the motor from the impeller wheel.