Troubleshooting Pump Style Freezers
PROBLEM PROBABLE CAUSE REMEDY
1. The air/mix pump will not operate The circuit breaker is off. Check the breaker.
when the PUMP keypad is
pressed. The power cord is unplugged. Plug in the power cord.
The freezer is out on reset. Reset the freezer.
The pump motor is out on reset. Press the PUMP keypad to cancel the
pump operation. Press the reset
button on the side of the pump motor
reducer. Press the PUMP keypad to
continue pump operation.
2. The air/mix pump will not operate The pump motor is out on reset. Press the PUMP keypad to cancel the
when the draw valve is opened
pump operation. Press the reset
and the unit is in the AUTO mode.
button on the side of the pump motor
reducer. Press the PUMP keypad to
continue pump operation.
The pump motor relay is Replace the relay.
malfunctioning.
3. The piston travels back and forth, Inspect the check bands. The check bands must be installed
but product is not being pumped.
correctly, fit tightly, and not have any
holes or lubrication.
Inspect the o-rings. O-rings must not be worn, torn, or fit
too loosely.
Check the pump cylinder. The piston and liquid valve body must
be assembled correctly, and fit snugly
in the pump cylinder.
The spring or poppet is missing or Replace.
defective.
4. Excessive pump cylinder wear. Inadequate or incorrect lubrication of Follow lubrication procedures
pump cylinder. carefully.
Incorrect ball crank rotation. (Must be Reverse pump rotation.
counterclockwise).
5. Pitting occurring inside the pump Cleaner was left inside the pump After brush cleaning the pump
cylinder. cylinder. cylinder, allow it to dry. Follow
disassembly procedures carefully.
6. The ball crank of the motor Incorrect rotation of pump motor. Reverse pump rotation.
reducer is broken.
7. Too much pressure is in the Plugged relief hole in the liquid valve Clean.
freezing cylinder. body below the poppet.
8. Not enough pressure is in the The spring in the liquid valve body is Replace.
freezing cylinder. weak or bent.
The draw switch is malfunctioning. Replace the draw switch.
The poppet is missing. Install the poppet.
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