PROBLEM
CHECK
CORRECTIVE ACTION
Motor will not start but fuses do not blow
No voltage.
No voltage at submersible motor control or disconnect switch.
Replace blown fuses.
No voltage at pressure switch.
Replace faulty pressure switch.
No voltage at submersible motor control.
Rewire supply to submersible motor control.
Cable or splices bad.
Consult licensed electrician or serviceman.
Submersible motor control incorrectly wired.
Reconnect submersible motor control correctly
(see Wiring Installation Diagrams).
Fuses blow or overload protector trips when motor starts
Wrong size fuse or wrong
Check fuse size against chart, Page 2.
Install correct fuse or time delay fuse.
size time delay fuse.
Wire size too small.
Check wire size against chart, Page 3.
Install correct size wire.
Starting capacitor defective,
Check submersible motor control to see if starting capacitor
Replace starting capacitor. Replace start relay if
blown, or wrong size.
has blown out. Check capacitor rating. Check start relay.
defective.
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 submersible motor control wiring diagram against
Reconnect leads to match wiring diagram in submersible
correctly connected to
incoming power hookup. Check power supply wire
motor control cover. Reconnect power supply wires so
submersible motor control.
color coding.
wire color code matches motor lead color code.
Broken wire in submersible
Examine all connections and wiring in submersible
Disconnect power and repair or replace faulty wire.
motor control.
motor control.
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 well
of all sand or lime before reinstalling pump.
Power supply wire splices or
Consult licensed electrician or qualified serviceman.
Do not attempt to disassemble pump or motor.
motor leads grounded,
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 submersible motor control.
Do not mount submersible motor control in direct sunlight.
temperature.
Submersible motor control
Compare voltage and horsepower on motor nameplate
Replace submersible motor control if numbers do not
with wrong voltage or
with those given on submersible motor control nameplate or
match. Use only submersible motor control designed for
horsepower rating.
on circuit diagram inside submersible motor control cover.
use with pump.
Wire size too small.
Check wire size against chart, Page 3.
Install correct wire size.
Pump starts too frequently
Leaks in system.
Check all tank connections with soapsuds for air leaks.
System must be air and water tight.
Check plumbing for leaks.
Pressure switch.
Check for defective switch or switch out of adjustment.
Re-adjust or replace pressure switch.
Check valves leaking.
Make sure check valves are not leaking back.
Replace check valves if necessary.
Tank waterlogged.
Pre-charged tanks: check tank pre-charge air pressure,
Pre-charge tanks: adjust air pressure to 2 PSI (13.
8
kPa)
check for leak in bladder.
less than pump cut-in pressure (when there is no water
pressure on system). Replace bladder if necessary.
Air over water tanks: check for air leaks Check
Air over water tanks: repair or replace tanks,
Air Volume Control (AVC).
replace AVC if necessary.
Leak in drop pipe.
Raise drop pipe one length at a time until water
Replace pipe above that point.
stands in pipe.
Pressure switch too far
Measure distance from pressure switch to tank.
Move switch to within 1' (.3M) of tank.
from tank.
Little or no water delivered
Check valve stuck
Examine valve.
If stuck, free valve; if installed backwards, reverse it.
or installed backwards
(standard tank only).
Low water level.
Determine lowest water level in well while pump is
Lower pump further into well (but at least 5' (1.5M)
running and compare to pump depth setting.
above bottom of well). Throttle pump discharge until
discharge equals recovery rate of well.
NOTICE:
Running
pump while airlocked can cause loss of prime and
seriously damage pump.
Low voltage.
Check voltage at submersible motor control with pump running.
Install larger wire from meter to submersible motor control.
Check incoming wire size and power supply wire size against
Install larger wire from submersible motor control to pump.
chart, Page 3.
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.
Worn impellers and
Make sure system is clear of obstructions and pump is in
Replace pump.
diffusers.
solid water and operating normally.
Air or milky water discharge from faucets
Gas in well water.
Check for presence of gas in well water.
Remove bleeder orifices; plug tees. Be sure plugged tees
do not leak. If necessary, separate gas from air before
it enters pressure tank.
Air volume control not work-
Make sure ports and ball check valves are clear.
Replace control if necessary.
ing (standard tanks only).
7
TROUBLESHOOTING GUIDE
