Table 3-1. Direct Support Troubleshooting- continued
TEST OR INSPECTION
BOOSTER PUMP ASSEMBLY
BOOSTER PUMP 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 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. Check if circuit breaker CB6 and/or heater assembly are tripped. Heater assembly is
tripped if resistance is felt when resetting it.
If circuit breaker, heater assembly, or both are tripped, go to Malfunction 2, Booster Pump Assembly.
Step 2. Check if other pumps operate.
If other pumps are inoperable, go to Malfunction 1, ROWPU Assembly.
Step 3. Visually check if relay K6 is ON or OFF.
If relay is OFF, go to step 7.
Step 4. Check if 208 VAC is available between T1-T2, T2-T3 and T1-T3 on heater assembly.
If voltage is measured in all three tests, go to step 6.
Step 5. Shut down power source and perform a continuity test of power circuit as follows.
Make additional point-to-point checks as necessary to find defective components:
To check continuity thru K6 it is necessary to physically push in relay plunger while
making the check.
L1, CB5 - T1, Heater Assembly
L2, CB5 - T2, Heater Assembly
L3, CB5 - T3, Heater Assembly