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Troubleshooting
Safety
TROUBLESHOOTING GUIDE
PROBLEM
Pump will not start but fuses do not blow
No voltage.
Fuses blow or overload protector trips when motor starts
Wrong size fuse or wrong
size time delay fuse.
Low or high voltage.
Power supply wire leads
not correctly connected
to control panel.
Broken wire in
control panel.
Pump stuck or binding.
Power supply wires or
pump leads grounded,
shorted, or open.
Fuses blow or overload protector trips when motor is running
Low or high voltage.
High ambient (atmospheric) Check temperature of tank
temperature.
Pump starts too frequently
Leaks in system.
Level switch.
Check valves leaking.
Little or no water delivered
Check valve stuck
or installed backwards
Low voltage.
Plugged intake screen.
Check valve at pump
discharge stuck.
Pump doesn't develop
enough pressure ("head").
CHECK
No voltage at control panel.
Electrical cable bad.
Control panel incorrectly wired.
Check fuse size against chart, above.
Check that line voltage is within ±10% of nameplate
rated voltage while motor is running.
Check control panel wiring diagram against incoming
power hookup. Check power supply wire color coding.
Examine all connections and wiring in control panel.
Check for locked shaft in pump.
Consult licensed electrician or qualified serviceman.
Check that line voltage is within ±10% of rated
nameplate voltage while motor is running.
Check plumbing for leaks.
Check for defective switch or switch out of adjustment.
Make sure check valves are not leaking back.
Examine valve.
Check voltage at control panel with pump running.
Pull pump and check condition of screen.
Pull pump and examine check valve.
Check pump curve against operating conditions.
CORRECTIVE ACTION
Replace blown fuses or bad cable.
Consult licensed electrician or serviceman.
Reconnect control panel correctly.
Install correct fuse or time delay fuse.
If voltage variation is greater than ±10%, call power
company or local hydro authority to adjust voltage.
Reconnect leads to match wiring diagram in control
panel cover. Reconnect power supply wires so wire
color code matches motor lead color code.
Disconnect power and repair or replace faulty wire.
If necessary, pull pump (make all possible above
ground checks first). If pump is locked, replace it.
Clean tank of all sand or lime, or solids before
reinstalling pump.
Have a qualified serviceman or electrician make
necessary cable repairs.
If voltage variation is more than ±10%, call power
company to adjust voltage.
Protect tank from direct sunlight.
Re-adjust or replace level switch.
Replace check valves if necessary.
If stuck, free valve; if installed backwards, reverse it.
Install larger wire from meter to control panel.
If necessary, have power company raise supply voltage.
Clean or replace as necessary.
Free check valve.
Replace pump with "higher head" pump.
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