Table 4-1. Troubleshooting Contd.
CAUSE OF TROUBLE
Bound Pump -
and motor caused by wedging in a
by temporarily rever-
crooked well or rough handling at
sing black and red leads
installation. Locked rotor readings
in control box then re-
can also indicate a sand bound
turning to normal. If
pump. Amp readings 3 to 6
pump does not rotate
times higher than normal will be
freely it must be
pulled and cleaned or
realigned and the well
Attach one ohmmeter lead to the
The pump must be
or motor wind-
drop pipe or well casing and touch
pulled and the cable
the other lead to each motor
disconnected and insp-
lead. If the needle moves appre-
ected. Damaged cable
ciably a ground is indicated in
should be correctly
either the motor or the drop
spliced or replaced. If
cable is good, the motor
winding is grounded.
Disconnect motor leads from con-
The pump must be
trol box, note length and size of
pulled and motor or
drop cable and use ohmmeter to
drop cable repaired
check resistance. Low ohms may
indicate shorted motor winding.
High resistance (no movement of
needle) can mean an open circuit
in winding or broken but not ex-
posed lead cable conductor.
MOTOR DOES NOT START -- FUSES DO NOT BLOW
Check fuses or circuit breaker.
Replace fuses or reset
Defective pressure Check voltage across pressure
Clean contact points
switch with contact closed. If
or replace switch.
voltage drop is equal to line volt-
age the switch is not making
Check for loose or corroded conn-
Correct faulty wiring
ections. Check motor lead term-
inals with voltmeter for power.
PUMP RUNS BUT DELIVERS LITTLE OR NO WATER
Air locked pump
Pump can be heard running but no
Normal delivery may re-
water noise is detected.
sume if pump is started
and stopped at one min-