TM 10-4610-239-24
TM 08580B-24/3
Table 3-1. Direct Support Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
REVERSE OSMOSIS ASSEMBLY - Continued
1. PUMP ELECTRIC MOTOR FAILS TO START WHEN R.O. PUMP SWITCH IS SET TO START - Continued
Step 16.
Disconnect R.O. pump connector P6 from ROWPU. Refer to schematic diagramfigure FO-3.
Check continuity between wire lugs on end of cable and P6-A, P6-B, P6-C, and P6-D.
If all four measurements indicate continuity, replace J6. Refer to paragraph 3-37.
If all four measurements do not indicate continuity, repair R.O. pump cable
assembly. Refer to paragraph 3-17.
Step 17.
Refer to schematic diagram figure FO-3. 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 tostep 18.
If there is continuity between a wire lug and El, repair R.O. pump electric motor.
Refer to paragraph 3-53.
Step 18.
Disconnect R.O. pump cable connector P6 from ROWPU. Refer to interconnect diagram
figure FO-4. Check continuity between wire lugs on end of cable and P6-D.
If there is continuity between a wire lug and P6-D, go to step 19.
If there is no continuity between any wire lug and P6-D, repair R.O.
pump cable assembly. Refer to paragraph 3-17.
Step 19.
Refer to interconnect diagram figure FO-4. Check continuity between TB3-3
and junction box ground terminal El.
If there is continuity, repair cable W10. Refer to paragraph 3-17.
If there is no continuity, repair wiring harness W39. Refer to paragraph
Step 20.
Check continuity between CB 1 terminals L1, L2, and L3 and J1 pins A, B, and Crespectively.
If all three measurements indicate continuity, go to step 21.
If all three measurement do not indicate continuity, go to step 22.
3-45
