INSTALLATION MANUAL
7
TROUBLESHOOTING CHART (CONT’D)
Symptoms
Possible Cause(s)
Suggested Remedies
Pump will not
start or run
1. Water level too low
2. Blown fuse or tripped circuit breaker
3. Low supply voltage
4. Motor
5. Switch
6. Inlet clogged
7. Switch obstruction
1. Water must be at the appropriate level to activate switch
2. If blown, determine cause and then either replace with proper
sized fuse or reset breaker
3. Contact an electrician
4. Replace pump
5. Replace switch
6. Remove debris
7. Remove obstruction to verify free motion of switch
Pump starts and
stops too often
1. Back-flow of water from discharge
pipe
2. Switch
3. Check valve not functioning properly
or leaking
1. Install check valve
2. Replace switch
3. Remove and examine check valve for prop er in stal la tion and free
operation. Replace check valve if necessary.
Pump shuts off
and turns on
independently
of switch (trips
thermal overload
protection)
1. Switch
2. Switch obstruction
3. Obstruction in discharge pipe
4. Low supply voltage
1. Replace tether switch
2. Remove obstruction to verify free motion of switch
3. Remove obstruction in discharge piping
4. Contact an electrician.
Pump operates
noisily or vibrates
excessively
1. Worn bearings
2. Impeller broken
3. Piping attachments to building
structure too rigid or too loose
1. Replace pump
2. Replace pump
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 switch
2. Remove obstruction to verify free motion of switch
3. Remove obstruction from discharge piping
4. Recheck all sizing calculations to determine proper pump size
Pump operates
but delivers little
or no water
1. Low supply voltage
2. Inlet clogged
3. Broken impeller
4. Pump not properly sized for
application
5. Check valve stuck closed or
installed backwards
6. Shut off valve closed
1. Contact an electrician
2. Remove debris
3. Replace pump
4. Recheck all sizing calculations to determine proper pump size
5. Remove and examine check valve for proper installation and free
operation
6. Open valve
Содержание T50SW
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