Table 3-1. Direct Support Troubleshooting - continued
TEST OR INSPECTION
RAW WATER PUMP ASSEMBLY NO. 1
RAW WATER PUMP CIRCUIT BREAKER (CB3) 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 safety of personnel. Never work on
electrical equipment unless there is another person nearby who is familiar with the
operation and hazards of the equipment.
Step 1. Remove power at power source, reset CB3 and disconnect wires from T1, T2 and T3 of CB3.
Step 2. Turn on power at power source and momentarily flip pump switch to START.
If circuit breaker CB3 trips, check for bare/disconnected wires in junction box and tighten/replace them.
If trouble persists, replace CB3. Refer to Paragraph 3-53.
Step 3. Remove power at power source, reconnect wires to CB3 and disconnect pump at junction box connector,
Step 4. Turn on power at power source and momentarily flip pump switch to START.
If heater assembly is tripped (TRIPPED window will show white if tripped). Check for defective heaters,
replace as necessary (Paragraph 3-53) and reset heater assembly.
Step 5. Remove power at power source.
Step 6. Disconnect cable assembly at raw water pump motor and check it for shorts (Paragraph 2-19).
If a short is indicated, repair cable assembly. Refer to Paragraph 3-11.
If pump cable assembly is not shorted, repair centrifugal pump. Refer to Paragraph 3-12.