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Troubleshooting 10
Problem Check Corrective Action
Motor will not start but fuses do not blow .
No voltage.
No voltage at fuse box. Consult power supplier, check generator.
No voltage at pressure switch.
Check connections, rewire from supply to
pressure switch.
No voltage on load side of pressure
switch.
Check connections, replace pressure
switch.
Cable or splices bad. Consult serviceman or licensed electrician.
Fuses blow or overload protector trips when motor starts .
Wrong size fuse or
wrong size time delay
fuse.
Check fuse size against Fuse Size
tables.
Install correct fuse or time delay fuse.
Wire size too small.
Check wire size against Cable Sizing
tables.
Install correct size wire.
Low or high voltage.
Check that line voltage is within
±10% of nameplate rated voltage
while motor is running.
If voltage variation is greater than ±10%,
call power company to adjust voltage.
Pump or motor stuck or
binding.
Check for locked rotor in pump.
If necessary, pull pump (make all possible
above ground checks first). If pump is
locked, replace it. Clean well of all sand or
lime before reinstalling pump.
Fuses blow or overload protector trips when motor is running .
Low or high voltage.
Check that line voltage is within
±10% of rated nameplate voltage
while motor is running.
If voltage variation is more than ±10%, call
power company to adjust voltage.
Wire size too small.
Check wire size against Cable Sizing
tables.
Install correct wire size.
Cable splices or motor
leads grounded,
shorted, or open.
Consult licensed electrician or
qualified serviceman.
Do not attempt to disassemble pump or
motor.
Pump starts too frequently .
Leaks in system.
Check all tank connections with
soapsuds for air leaks. Check
plumbing for leaks.
System must be air and water tight.
Pressure switch.
Check for defective switch or switch
out of adjustment.
Re-adjust or replace pressure switch.
Tank waterlogged.
Pre-charged tanks; check tank pre-
charge air pressure, check for leak in
bladder.
Air over water tanks: repair or replace
tanks; replace air pressure valve if
necessary.
Air over water tanks: check for air
leaks. Check Air Volume Control
(AVC). Check air pressure valve
operation.
Air over water tanks: repair or replace
tanks; replace air pressure valve if
necessary.
Leak in drop pipe.
Raise drop pipe one length at a time
until water stands in pipe.
Replace pipe above that point.
Pressure switch too far
from tank.
Measure distance from pressure
switch to tank.
Move switch to within one foot (.3m) of
tank.