Cornelius MILLENNIUM MJ41-6PB Installation & Service Manual page 17

TROUBLESHOOTING GUIDE
Problem
WITH POWER PRESENT
DISPENSER WILL NOT
COOL
Drink temperature should be
35-45°F
2-7°C
WITH POWER PRESENT
COMPRESSOR WILL NOT
RUN
(Compressor shell is cold to
touch)
COMPRESSOR RUNS BUT
NO COOLING IS TAKING
PLACE
COMPRESSOR RUNS BUT
NO COOLING. TRIPPING
OVERLOAD
(Compressor shell is hot to
touch)
Probable Cause
Refrigeration shut off switch
is in the off position.
Depleted ice bank (not
applicable after period of
heavy usage.)
Loose or broken wire
connections.
Defective compressor start
component.
Ice bank control not connected
or defective.
Low refrigerant charge.
Refrigerant restriction.
Condenser fan not running.
Inadequate air flow through
the dispenser.
16
Remedy
screw is not over tightened. Screw
contact with the bracket will cause a
short and the firing of the valve
when other valves are energized.
Refrigeration shut off switch is
located on the top of the dispenser.
This switch will disable the
compressor and condenser fan motor.
Be sure the switch is in the on
position.
Remove rear bonnet covering the
refrigeration deck. CAUTION should
be observed when working in this
area as the dispenser is energized and
operational. Check to see if the
compressor is running . If so allow
the system to recover (approximately
1 hour).
Check the wire connections at the
compressor. Be sure they are tightly
secured.
Check the compressor start relay.
Replace as required.
Check the ice bank control
connections. To test, place jumper
between the 2 leads. If the
compressor starts ,the ice bank
control is defective.
Contact a refrigeration service
technician. They will check for leaks
(sign of oil at joints and fitting) and
will recharge if necessary.
Refrigeration technician will examine
the system for, kinks in lines,
restrictions, etc. Heat exchanger may
need to be replaced.
Check that the condenser fan is
running. If the fan is binding or
turning slowly, an overload condition
will occur.
Air flow is top front in, exhaust out
the rear. NEVER
ANYTHING ON TOP OF THE
PLACE