PROBLEM
CHECK
CORRECTIVE ACTION
Motor 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 or wrong
Check fuse size against chart, Page 3.
Install correct fuse or time delay fuse.
size time delay fuse.
Low or high voltage.
Check that line voltage is within ±10% of nameplate
If voltage variation is greater than ±10%, call power
rated voltage while motor is running.
company or local hydro authority to adjust voltage.
Power supply wire leads not
Check control panel wiring diagram against incoming
Reconnect leads to match wiring diagram in control
correctly connected to
power hookup. Check power supply wire color coding.
panel cover. Reconnect power supply wires so wire color
control panel.
code matches motor lead color code.
Broken wire in control panel.
Examine all connections and wiring in control panel.
Disconnect power and repair or replace faulty wire.
Pump stuck or binding.
Check for locked shaft in pump.
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.
Power supply wires or
Consult licensed electrician or qualified serviceman.
Have a qualified serviceman or electrician make
pump leads grounded,
necessary cable repairs.
shorted, or open.
Fuses blow or overload protector trips when motor is running
Low or high voltage.
Check that line voltage is within ±10% of rated nameplate
If voltage variation is more than ±10%, call power
voltage while motor is running.
company to adjust voltage.
High ambient (atmospheric)
Check temperature of tank
Protect tank from direct sunlight.
temperature.
Pump starts too frequently
Leaks in system.
Check plumbing for leaks.
Level switch.
Check for defective switch or switch out of adjustment.
Re-adjust or replace level switch.
Check valves leaking.
Make sure check valves are not leaking back.
Replace check valves if necessary.
Little or no water delivered
Check valve stuck
Examine valve.
If stuck, free valve; if installed backwards, reverse it.
or installed backwards
Low voltage.
Check voltage at control panel with pump running.
Install larger wire from meter to control panel.
If necessary, have power company raise supply voltage.
Plugged intake screen.
Pull pump and check condition of screen.
Clean or replace as necessary.
Check valve at pump
Pull pump and examine check valve.
Free check valve.
discharge stuck.
Pump doesn’t develop
Check pump curve against operating conditions.
Replace pump with “higher head” pump.
enough pressure (“head”).
TROUBLESHOOTING GUIDE
