Service manual

Quest Installation and Service Manual
Revision B - 12 - 720506904
TROUBLE-SHOOTING
GUIDE
The following pages contain trouble-shooting information intended to aid an experienced service
person in diagnosing operational problems that may occur. For further assistance, contact the IMI
Cornelius Technical Services department at 1-888-248-5568 (630-539-6850 outside the United
States) between the hours of 7:30A.M. and 5:00P.M. Central Standard Time. You must have the
model and serial number (Located on the right side of the dispenser) prior to calling.
PROBLEM PROBABLE CAUSE REMEDY
Totally Inoperative • No power to dispenser due to
tripped circuit breaker
• Reset circuit breaker. Confirm
that breaker is correct size and
no other equipment is operating
on the same circuit. Also confirm
that supply voltage is +/- 10% of
nameplate specifications.
• Loose or broken power supply
connection inside dispenser.
• Repair connection.
No cooling • Line voltage is not within +/- 10%
of nameplate specifications caus-
ing compressor overload to trip
• Contact an electrician
• No water in water ice bath or
water level extremely low expos-
ing the ice bank sensing probe
• Fill ice bath to proper water level
• Defective Ice Bank Control or
sensing probe
• Replace
• Cabinet fan is inoperative result-
ing in warm concentrate (water
continues to cool)
• Replace
• Compressor short cycles on
overload
• Excessively high discharge pres-
sure due to restricted condenser
or inoperative condenser fan
motor
• Compressor starts but hums and
trips overload
• Seized or shorted compressor,
replace
• Defective compressor overload
or start capacitor
• Test and replace
• Compressor starts but does not
switch off of start winding
• Relay or compressor is defective.
Test and replace faulty item
• Refrigerant leak • Repair leak, evacuate and
recharge system
No water dis-
pensed, concen-
trate only
• No water to dispenser • Restore Water
• Water supply line inside refriger-
ated cabinet disconnected from
pump platform
• Reconnect