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© Copyright 2019 Zoeller
®
Co. All rights reserved.
Before servicing a pump, always shut off the main
power breaker and then unplug the pump - making sure you are
not standing in water and are wearing insulated, protective-sole
shoes. Under flooded conditions, contact your local electric company
or a qualified licensed electrician for disconnecting electrical service
prior to pump removal.
If the above checklist does not solve the problem, consult Zoeller Technical
Service Department 1-(800) 928-PUMP - Do not attempt to service or
otherwise disassemble pump.
Trouble Shooting Guide
Condition
Possible Cause
Remedy
A. UNIT DOESN’T RUN.
Pump not plugged in.
Plug in.
Low voltage; blown fuse, open circuit.
Have a qualified electrician check fuse circuit.
No condensate in reservoir.
Be certain the appliance is generating condensate.
Check drain line(s) and/or discharge line for
blockage.
Motor or wiring shorted.
Contact Factory.
Drain/Discharge line(s) blocked.
Check drain line(s) and/or discharge line for
blockage.
B. PUMP MAKES LOUD NOISES WHEN
RUNNING.
Debris in reservoir.
Refer to “Maintenance Guidelines” section for
cleaning instructions.
C. PUMP RUNS BUT DOES NOT PUMP
LIQUID OUT.
Float bound.
Refer to “Maintenance” section for cleaning
instructions.
Maximum discharge height exceeded.
Measure from bottom of pump to highest point.
Rework discharge if height is greater that 18’.
Refer to STEP 3 for guidelines.
Discharge tube blocked.
Check discharge line for blockage, remove debris.
Check Valve obstruction.
Refer to “Maintenance” section for cleaning
instructions.
Check Valve damaged.
Contact Factory.
D. LIQUID DRAINS BACK INTO PUMP FROM
DISCHARGE LINE.
Check Valve damaged.
Contact Factory.
Check Valve obstruction.
Refer to “Maintenance” section for cleaning
instructions.
Highest point of discharge line is less than 5’.
Check valve may allow some condensate to drain
out of line into reservoir. This is normal.
E LIQUID LEAKS FROM AROUND CHECK
VALVE.
Check Valve is too tight or too loose.
Check valve should be hand tight, then tighten an
additional 1/2 turn with a 9/16” wrench.
