Service Manual

Column Refrigeration Service Manual
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15
3.1 Refrigeration System (cont.)
Table 3.1. Refrigeration System Diagnostics/Troubleshooting
PROBLEM CAUSE SOLUTION
Evaporator Frozen Air Inltration
Access Hole Ensure access hole is sealed
with permagum
Module to Cabinet Seal Check for leaks between the refrigeration
module and cabinet
Door Left Open Ensure door closes properly
(hinges activated)
Door Gasket Seal Ensure door gasket integrity and it is
installed properly
Reed Switch Wire Hole Ensure reed switch wire hole is sealed
with permagum
Thermistors
Loose Connection Verify Continuity
Defective VerifyComponentSpecications
Temp/Humidity Sensor
Defective VerifyComponentSpecications
Loose Connection Verify Continuity
Evaporator
Dirty Clean
Defective VerifyComponentSpecications
Evaporator Fan Motor(s)
Fan Blades Binding Remove Obstruction
Defective Verify and Replace
Defrost Thermistor
Out of Position Install in proper location
Loose Connection Verify Continuity
Defective Verify and Replace
Hot Gas Solenoid Valve (Freezer Only)
Valve Stuck Verify and Replace Module
Coil Open Verify and Replace