PROBLEM
CHECK
CORRECTIVE ACTION
Motor will not start but fuses do not blow
No voltage.
No voltage at disconnect switch.
Replace blown fuses or bad cable, reset circuit breakers.
Electrical cable bad.
Consult licensed electrician or serviceman.
Fuses blow or overload protector trips when motor starts
Wrong size fuse,
Check fuse or circuit breaker size against chart, Page 2.
Install correct fuse, time delay fuse, or circuit breaker.
time delay fuse,
or circuit breaker.
Wire size too small.
Check wire size against chart, Page 3.
Install correct size wire.
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.
Pump or motor stuck or
Check for locked shaft in pump.
If necessary, pull pump (make all possible above ground
binding.
checks first). If pump is locked, replace it. Clean tank
of all sand, lime, and solids before reinstalling pump.
Power supply wires or
Consult licensed electrician or qualified serviceman.
Have a qualified serviceman or electrician make necessary
motor leads grounded,
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.
Wire size too small.
Check wire size against chart, Page 3.
Install correct wire size.
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.
Low voltage.
Check voltage at circuit breaker with pump running.
Install larger wire from meter to circuit breaker. Install
Check incoming wire size and power supply wire size
larger wire from circuit breaker to pump. If necessary,
against chart, Page 3.
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.
Worn impellers and
Make sure system is clear of obstructions and pump is in
Replace pump.
diffusers.
solid water and operating normally.
Pump doesn’t develop
Check pump curve against operating conditions.
Replace pump with “higher head” pump.
enough pressure (“head”).
Plugged impellers.
Pull pump.
Replace pump.
TROUBLESHOOTING GUIDE
