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. ELEC TRIC MOTOR DRIVEN PUMP FAILS TO RUN. - continued
Step 7.
Perform continuity and short test on cable between motor conduits box and plug on junction box.
a. If short or open is found, check plug contacts for loose or broken wires.
b. If beyond economical repair, replace cable.
c. If cable is good, continue with electrical checks.
Step 8. Open junction box cover, perform continuity and short checks between pump receptacle and
motor starter terminals T1, T2, and T3. (Refer to schematic, figure 1 –1 2.)
a. If short or open is found, check receptacle contacts and electrical connections for loose,
broken wires, or contacts. Repair or replace.
b. If wiring and connections are good, continue with electrical checks.
Step 9.
Perform continuity check on motor starter overload relays.
NOTE
Motor starters have from one to three overload relays each. Input
and output terminals are normally closed.
If an open is found, heater may need replacing.
Step 10. Depress RESET button and retest.
a. If open remains, replace heater element and retest.
b. If open cannot be repaired, replace motor starter.
c. If all overload relays are good, continue with electrical check,
Step 11. Perform continuity and short test on motor starter between input and output terminals L1, L2, and
L3. (Refer to schematic, figure 1-12.)
NOTE
All tests should show an open.
a. If any short is found, replace motor starter.
b. If all tests read open, continue with electrical test.
Step 12. Manually hoId movable contact assembly of motor starter in the closed position (from bottom of
motor starter).
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