TM 10-4610-239-24
TM 08580B-24/3
Table 3-1. Direct Support Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
CHEMICAL FEED METERING PUMP ASSEMBLY - Continued
PUMP ELECTRIC MOTOR FAILS TO START WHEN CHEMICAL FEED PUMP SWITCH IS
SET TO START - Continued
I
f 115 V ac is not present after repeating step 5, go to step 7.
If 115 V ac is present after repeating step 5, malfunction caused by
faulty heater element has been corrected.
Step 7.
Shut down ROWPU. Refer to TM 10-4610-239-10. Shut down power. Refer to generator
manual. Refer to schematic diagram figure FO-3. Check for short circuit between junction
box ground terminal El and K7 terminal T. If K7 terminal is shorted to ground terminal El, go
to step 8. If K7 terminal is not shorted to ground terminal El, replace K7. Refer to paragraph
Step 8.
Remove chemical feed metering pump cable. Refer to paragraph 3-50. Refer to
schematic diagram figure FO-3. Check for short circuits between wire lugs on motor cable.
If any lugs are shorted, repair chemical feed metering pump cable assembly. Refer to
If no lugs are shorted, repair chemical feed metering pump electric motor. Refer to paragraph 3-52.
Step 9.
Shut down ROWPU. Refer to TM 10-4610 239-10. Shut down power. Refer to generator
-
manual. Remove chemical feed metering pump cable assembly from motor. Refer to
Check continuity between K7 terminal T and wire lugs on end of cable.
If no measurement indicates continuity, repair cable assembly. Refer to paragraph 3-17.
Step 10. Shut down ROWPU. Refer to TM 10-4610-239-10. Shut down power. Refer to generator
manual. Refer to interconnect diagram figure FO-4. Check continuity between K7 terminal
L and J1 pin A.
If check indicates continuity, repair K7. Refer to paragraph 3-49.
If check does not indicate continuity, go to step 11.
Step 11. Check continuity between CB7 terminal L and J1 pin A.
If measurement indicates continuity, go to step 12.
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