Model 916/917_________________________________________________________________________________Service
5-2
No Temperature Display
•
Power line cord disconnected or not properly installed
•
External power circuit breaker tripped/open
•
Main power switch OFF
•
24 volt transformer fuses open.
Symptom
Possible Cause
Chamber Temperature Deviates from Set Point
•
Too much warm product added
•
Door open too long
•
Inadequate air circulation
•
Calibration
•
Dirty condenser
•
High ambient temperature
Too Much Frost Build-Up
•
Door not properly sealed.
Freezer not Being Refrigerated (unit is receiving power)
•
Compressor thermal overload open
•
Loss of refrigerant in either system
•
Defective compressor(s)
•
Defective temp control
•
Defective high pressure cut-off
Display Problems in General
•
Defective temp control board.
Condenser Hot Light On
•
Clogged air filter
•
Clogged condenser
•
Fan failure
5.2 Troubleshooting Chart
