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TROUBLESHOOTING (CONTINUED)
Symptoms Possible Cause(s) Suggested Remedies
Pump shuts off
and turns on
independently
of switch (trips
thermal overload
protection)
1. Excessive water temperature
2. Switch
3. Switch Obstruction
4. Obstruction in discharge pipe
5. Low line voltage
1. Pump should not be used for water above 120º F
2. Replace switch kit
3. Remove obstruction to ensure free motion of switch
4. Remove obstruction in discharge piping
Pump may start unexpectedly.
Disconnect power supply before ser vic ing.
5a. Contact an electrician.
5b. Do not use an extension cord.
Pump operates
noisily or
vibrates
excessively
1. Worn bearings
2. Debris in impeller cavity or broken
3. Piping attachments to building
structure too rigid or too loose
1. Replace pump
2. Remove screen and volute, clean impeller and/or replace
impeller
3. Install rubber coupling (available at local hardware stores) to
isolate pump vibration from discharge plumbing
Pump will not
shut off
1. Switch
2. Switch obstructions
3. Restricted discharge (obstruction in
piping)
4. Excessive inflow or pump not
properly sized for application
1. Replace with switch kit
2. Remove obstruction to ensure free motion of switch
3. Remove obstruction from discharge piping
4. Recheck all sizing calculation to determine proper pump size
Pump operates
but delivers little
or no water
1. Low line voltage
2. Inlet screen clogged
3. Broken impeller or debris in
impeller cavity
5. Pump not properly sized for
application
6. Check valve stuck closed or
installed backwards
7. Shut off valve closed
1a. Contact an electrician
1b. Do not use an extension cord.
2. Remove debris
3. Remove screen and volute , clean impeller and/or replace
impeller
5. Recheck all sizing calculations to determine proper pump size
6. Remove and examine check valve for proper installation and
free operation
7. Open valve
7
INSTALLATION MANUAL
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