Zoeller 1263-0001Q, Manual

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11
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TROUBLESHOOTING
Problem Possible Cause Corrective Action
Pump will not
start or run.
1. Water level too low. 1. Water must be at the appropriate level
to activate switch.
2. Blown fuse or tripped circuit breaker. 2. If blown, determine cause and then
either replace with properly sized fuse,
or reset breaker.
3. Low line voltage. 3. Contact an electrician.
4. Motor is defective. 4. Replace pump.
5. Switch is defective. 5. Replace switch.
6. Inlet screen clogged. 6. Remove debris.
7. Switch is obstructed. 7. Remove obstruction to ensure free
motion of switch.
Pump starts and
stops too often.
1. Water is back-flowing into basin from
discharge pipe.
1. Install check valve.
2. Switch is defective. 2. Replace switch.
3. Check valve not functioning properly
or leaking.
3. Be sure check valve is installed and
operating properly. Replace check
valve if necessary .
Pump shuts off
and turns on
independently
of switch (trips
thermal overload
protection.)
1. Excessive water temperature. 1. Pump should not be used for water
above 104°F (40°C).
2. Switch is defective. 2. Replace switch.
3. Switch is obstructed. 3. Remove obstruction to ensure free
motion of switch.
4. Discharge pipe is clogged. 4. Remove clog in discharge piping.
5. Low line voltage. 5. Contact an electrician.
Pump is noisy
or vibrates
excessively.
1. Worn bearings. 1. Replace pump.
2. Impeller is clogged or damaged. 2. Where applicable, remove screen
and volute, clean impeller or replace
impeller.
3. Piping attachment to building
structure too rigid or too loose.
3. Install rubber coupling (not included) to
isolate pump vibration from discharge
piping.
Pump will not
shut off.
1. Switch is defective. 1. Replace switch.
2. Switch is obstructed. 2. Remove obstruction to ensure free
motion of switch.
3. Discharge pipe is clogged. 3. Remove clog in discharge piping.
4. Water inflow exceeds pump capacity.
.
4. Re-check sizing calculations to
determine proper pump size.