Table 3-1. Direct Support Troubleshooting - continued
TEST OR INSPECTION
RAW WATER PUMP ASSEMBLY NO. 2
RAW WATER PUMP NO. 2 STOPS AND/OR FAILS TO START.
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.
Check if circuit breaker CB4 and/or heater assembly are tripped.
If circuit breaker or heater assembly is tripped, go to Malfunction 2, Raw Water Pump Assembly No 2.
Check if other pumps operate.
If other pumps do not work, go to Malfunction 1, ROWPU Assembly.
Check if relay K4 is ON.
If relay is not ON, go to step 8.
Check voltage at RAW WATER PUMP NO 2 connector, J4.
If voltage is measured, go to step 6.
Perform a continuity check of power circuit as follows, make additional point-to-point checks as
necessary to find defective components.
To check continuity through K4 it is necessary to physically push up on relay plunger while
making the check.
L3, CB3 - J4(A)
L2, CB3 - J4(B)
L1, CB3 - J4(C)