Carrier C708 - Pump Style Freezer Troubleshooting

59
Models C708/C709/C716/C717
Troubleshooting
Pump Style Freezer Troubleshooting
PROBLEM PROBABLE CAUSE REMEDY
1. Air/mix pump will not operate in
the “AUTO” mode when the draw
valve is opened.
a. The pump drive motor is off on
reset.
a. Allow the unit to cool and press
the reset button.
b. Malfunctioning interface board. b. Replace interface board.
c. Faulty pump motor. c. Replace motor.
d. Faulty connection or draw switch. d. Check connections or replace
switch.
2. Excessive pump cylinder wear. a. Inadequate or incorrect lubrication
of pump cylinder.
a. Lubricate properly.
b. Ball crank rotates c lockwise. b. Rewire ball crank rotation to rotate
counterclockwise.
3. Not enough pressure in the
freezing cylinder.
a. Malfunctioning draw switch. a. Reposition or replace the
microswitch.