TO 40W4- 13-22
Table 3-1. Direct Support Troubleshooting - continued
TEST OR INSPECTION
DISTRIBUTION PUMP ASSEMBLY - continued
2. DISTRIBUTION PUMP CIRCUIT BREAKER (CB5) AND/OR OVERLOAD HEATERS TRIP.
High voltages in this equipment can cause serious injury or death.
When applying power during a test, take proper measures to
ensure personal safety. Never work on electrical equipment unless
there is another person nearby who is familiar with the operation
and hazards of the equipment and who is competent in
administering first aid.
Step 1. Remove power at power source, reset circuit breaker (CB5) and disconnect wires on
CB5 output terminals (T1, T2 and T3)
Step 2. Turn on power.
If circuit breaker CB5 trips, check for bare/disconnected wires injunction box and
tighten loose connections or replace defective wire If trouble persists, replace CB5
Step 3. Remove power at power source, reconnect wires to CB5; if tripped, reset heater
assembly, and disconnect wires (T1, T2 and T3) from heater assembly
Step 4. Turn on power
If heater assembly trips, check for detective heaters, replace as necessary (para 349)
and reset heater assembly.
Step 5. Remove power at power source and reconnect wires to heater assembly.
Step 6. Check pump cable assembly for continuity and shorts.
a If a short is indicated, replace cable assembly. Refer to paragraph 3-12.
b. If cable assembly is not defective, repair pump Refer to paragraph 3-13
Step 7. Remove power at power source and check for bare and/or disconnected wires in
Tighten loose connections and/or replace defective wires