Cold Beverage Dispenser Training Manual

Jet Spray (Cold) Training Manual
- 16 - © 2000, IMI Cornelius Inc.
2. Compressor will not
start — hums but trips
overload protector
A. Improperly wired
B. Low voltage to unit
C. Relay not closing
D. Compressor motor
winding open or
shorted
E. Internal mechanical
trouble in compressor
F. Liquid refrigerant in
compressor
A. Check wiring against
diagram
B. Correct problem
C. Correct problem
D. Replace compressor
E. Replace compressor
F. Add crankcase heater
and/or accumulator
3. Compressor starts but
start winding does not
switch off
A. Improperly wired
B. Low voltage to unit
C. Relay failed to open
D. Excessively high dis-
charge pressure
E. Compressor has wind-
ing open or shorted
F. Internal mechanical
trouble in compressor
A. Check wiring against
diagram
B. Correct problem
C. Correct problem
D. Check discharge shut-
off valve, possible
overcharge, or insuffi-
cient condenser cooling
E. Replace compressor
F. Replace compressor
4. Compressor starts but
then short-cycles on
overload protector
A. Additional current
passing thru overload
protector
B. Overload protector
defective
C. Excessive discharge
pressure
D. Suction pressure too
high
E. Compressor too hot,
return gas hot
F. Compressor has wind-
ing open or shorted
A. Check wiring diagram;
check for added fan
motors, pumps, etc.
connected to wrong
side of connector
B. Check current, replace
protector
C. Check ventilation,
restrictions in cooling
medium or refrigera-
tion system
D. Check for possible mis-
application, use stron-
ger unit
E. Check refrigerant
charge and add if nec-
essary (fix leak first)
F. Replace compressor
PROBLEM (fault) CAUSE (diagnosis) ACTION (remedy)
TROUBLE SHOOTING