TM 10-4610-239-24
TM 08580B-24/3
Table 3-1. Direct Support Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
BACKWASH PUMP ASSEMBLY - Continued
2. PUMP ELECTRIC MOTOR FAILS TO START WHEN ELEMENT CLEANING SWITCH IS SET TO START -
Continued
Step 13.
Shut down ROWPU. Refer to TM 10-4610-239-10. Shut down power. Refer to generator
manual. Remove backwash pump cable assembly from motor. Refer to paragraph 2-138.
Leave cable connected to receptacle connector J2. Refer to schematic diagram figure
on end of cable.
If all three measurements do not indicate continuity, go to step 14.
If all three measurements indicate continuity, go to step 15.
Step 14.
Disconnect backwash pump cable connector P2 from RO'WPU. Refer to schematic
diagram figure FO-3. Check continuity between wire lugs on end of cable and P2-A, P2-B,
P2-C, and P2-D.
If all four measurements indicate continuity, replace receptacle connector J2.
Refer to paragraph 3-37.
If all four measurements do not indicate continuity, repair backwash pump
cable assembly. Refer to paragraph 3-17.
Step 15.
Refer to interconnect diagram figure FO-4. Check continuity between wire lugs on end of
cable and junction box ground terminal El.
If there is no continuity between any wire lug and El, go to step 18.
If there is continuity between a wire lug and El, repair backwash pump electric
motor. Refer to paragraph 3-61.
Step 16.
Disconnect backwash pump cable connector P2 and ROWPU. Refer to interconnect
diagram figure FO-4. Check continuity between wire lugs on end of cable and P2-D.
If there is continuity between a wire lug and P2-D, go to step 17.
If there is no continuity between any wire lug and P2-D, repair backwash pump
cable assembly. Refer to paragraph 3-17.
3-72
