Troubleshooting
4
SYMPTOM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
Pump will not start but fuses do not blow
No voltage.
No voltage at control panel.
Replace blown fuses or bad cable.
Electrical cable bad.
Consult licensed electrician or serviceman.
Control panel incorrectly wired.
Reconnect control panel correctly.
Fuses blow or overload protector trips when motor starts
Wrong size fuse
Check fuse size against chart,
Install correct fuse or time delay fuse.
or wrong size time
Page 2.
delay fuse.
Low or high
Check that line voltage is within
If voltage variation is greater than ±10%,
voltage.
±10% of nameplate rated voltage
call power company or local hydro
while motor is running.
authority to adjust voltage.
Power supply
Check control panel wiring diagram
Reconnect leads to match wiring diagram in
wire leads not
against incoming power hookup.
control panel cover. Reconnect power supply
correctly
Check power supply wire color
wires so wire color code matches motor lead
connected to
coding.
color code.
control panel.
Broken wire in
Examine all connections and wiring
Disconnect power and repair or replace faulty
control panel.
in control panel.
wire.
Pump stuck or
Check for locked shaft in pump.
If necessary, pull pump (make all possible above
binding.
ground checks first). If pump is locked, replace it.
Clean tank of all sand, lime, or solids before
reinstalling pump.
Power supply
Consult licensed electrician or
Have a qualified serviceman or electrician make
wires or pump
qualified serviceman.
necessary cable repairs.
leads grounded,
shorted, or open.
Fuses blow or overload protector trips when motor is running
Low or high
Check that line voltage is within
If voltage variation is more than ±10%, call power
voltage.
±10% of rated nameplate voltage
company to adjust voltage.
while motor is running.
High ambient
Check temperature of tank.
Protect tank from direct sunlight.
(atmospheric)
temperature.
Pump starts too frequently
Leaks in system.
Check plumbing for leaks.
Level switch.
Check for defective switch or switch
Re-adjust or replace level switch.
out of adjustment.
Check valves
Make sure check valves are not
Replace check valves if necessary.
leaking.
leaking back.
Little or no water delivered
Check valves stuck
Examine valves.
If stuck, free valve; if installed backwards,
or installed
reverse it.
backwards.
Low voltage.
Check voltage at control panel with
Install larger wire from meter to control panel.
pump running.
If necessary, have power company raise supply
voltage.
Plugged intake
Pull pump and check condition
Clean or replace as necessary.
screen.
of screen.
Check valve at
Pull pump and examine check valve.
Free check valve.
pump discharge
stuck.
Pump doesn’t
Check pump curve against
Replace pump with “higher head” pump.
develop enough
operating conditions.
pressure (“head”).
