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PROBLEM
CHECK
Motor will not start but
fuses do not blow
No voltage.
No voltage at fuse box.
No voltage at pressure switch.
No voltage at control box.
Cable or splices bad.
Control box incorrectly wired.
Fuses blow or overload
protector trips when
motor starts
Wrong size fuse or wrong
Check fuse size against Tables II and III,
size time delay fuse.
Pages 3 and 4.
Wire size too small.
Check wire size against Table III, Page 4.
Starting capacitor
Check control box to see if starting
defective or blown.
capacitor has blown out.
Low or high voltage.
Check that line voltage is within ±10% of
nameplate rated voltage while motor is
running.
Cable leads not correctly
Check control box wiring diagram
connected to control box.
against incoming power hookup.
Check drop cable color coding.
Broken wire in control
Examine all connections and wiring in
box.
control box.
Pump or motor stuck or
Check for locked rotor in pump.
binding.
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.
High ambient
Check temperature of control box.
(atmospheric temperature).
Control box with wrong
Compare voltage and horsepower on
voltage or horsepower
motor nameplate with those given on
rating.
control box nameplate or on circuit
diagram inside control box cover.
Wire size too small.
Check wire size against Table III, Page 4.
Cable splices or motor
Consult licensed electrician or qualified
leads grounded, shorted,
serviceman.
or open.
Pump starts too
frequently
Leaks in system.
Check all tank connections with
soapsuds for air leaks. Check plumbing
for leaks.
Pressure switch.
Check for defective switch or switch out
of adjustment.
Tank waterlogged.
Pre-charged tanks; check tank pre-
charge air pressure, check for leak in
bladder.
Air over water tanks: check for air leaks.
Check Air Volume Control (AVC).
Check snifter valve operation.
Leak in drop pipe.
Raise drop pipe one length at a time
until water stands in pipe.
Pressure switch too far
Measure distance from pressure switch
from tank.
to tank.
TROUBLESHOOTING GUIDE
Replace blown fuses.
Replace faulty pressure switch.
Rewire supply to control box.
Consult licensed electrician or serviceman.
Reconnect control box correctly (see wiring
diagrams, Pages 6 through 8).
Install correct fuse or time delay fuse.
Install correct size wire.
Replace starting capacitor.
If voltage variation is greater than ±10%, call
power company to adjust voltage.
Reconnect leads to match wiring diagram in
control box cover.
Reconnect drop cable so cable color code
matches motor lead color code.
Disconnect power and repair or replace faulty
wire.
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.
If voltage variation is more than ±10%, call
power company to adjust voltage.
Do not mount control box in direct sunlight.
Replace control box if numbers do not match.
Install correct wire size.
Do not attempt to disassemble pump or motor.
System must be air and water tight.
Re-adjust or replace pressure switch.
Pre-charge tanks: adjust air pressure to 2 PSI
(13.8 kPa) less than pump cut-in pressure (when
there is no water pressure on system).
Replace bladder if necessary.
Air over water tanks: repair or replace tanks;
replace snifter valves if necessary.
Replace pipe above that point.
Move switch to within one foot of tank.
10
CORRECTIVE ACTION
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