Table 2-3. Troubleshooting (ROWPU) CONTINUED
TEST OR INSPECTION
1. ELECTRIC MOTOR DRIVEN PUMP FAILS TO RUN. continued
ELECTRICAL HIGH VOLTAGE
Electricity can cause serious injury or death. Be certain that all
power is removed before performing maintenance on electrical
To accomplish step 19 will require power to be connected and a
minimum of two personnel.
Reinstall previously disconnected wiring/cable.
Connect power to junction box.
Switch all circuit breakers one at a time to the ON position.
While observing the motor starter, momentarily hold start/stop switch in the START position.
a. Operating coil should actuate movable contact assembly of all motor starters.
b. If operating coil fails to actuate, replace the defective motor starter.
c. If actuating coil operates, continue electrical tests.
Inside conduit box of pump motor, identify three power wires (A, B, and C). Holding start/stop
switch in the START position, check for approximately 104 Vac between phase A and B, B and C,
and A and C. (Refer to schematic, figure 112)
a. Replace conduit box covers.
b. Test pump assembly for full operation.
2. PUMP MOTOR CIRCU IT-BREAKER TRIPS AND WILL NOT RESET.
Press RESET buttons on motor starter.
Reset circuit breaker.
If circuit breaker trips, repair or replace.
Step 3. Test pump motor for proper operation.
If circuit breaker trips, perform continuity and short tests in accordance with item 1, table 2-3.