TM 10-4610-215-24
TM 08580A–24/2
Table 2-3. Troubleshooting (ROWPU) CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PUMP/MOTORS – continued
1. ELECTRIC MOTOR DRIVEN PUMP FAILS TO RUN. – continued
Step 13. Retest contacts L1, L2, and L3.
NOTE
Input and output contact terminals should read a short. No shorts
should be present between L1, L2, and L3.
a. If short is found between L1, L2, and L3, replace motor starter.
b. If open is found between input and output contacts, replace motor starter.
c. If all tests are good, continue with electrical checks.
WARNING
Before performing step 14, be sure that corresponding circuit
breaker is in the OFF position. (Refer to schematic, figure 1-12.)
Step 14. Perform continuity and short check between motor starter input terminals L1, L2, and L3, and
output side of circuit breaker. (Refer to schematic, figure 1–1 2.)
a. If short or open is found, check each wire and contact for loose or broken connections.
Repair or replace.
b. Remove all wires from circuit breaker.
c. If wires and contacts are good, continue with electrical checks.
Step 15. With all wires removed from circuit breaker, perform continuity and short check.
a. In OFF position, contacts should read open. If not, replace the circuit breaker.
b. In ON position, contacts should read closed. If not, replace the circuit breaker.
c. If circuit breaker is good, continue with electrical checks.
Step 16. Perform continuity and short check between motor starter operating coil and start/stop switch.
a. If continuity does not check normal, check each wire and contact for loose or broken
connections. Repair or replace.
b. If everything reads normal, continue with electrical checks.
2–1 5
