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 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 CB6 and/or heater assembly are tripped.
If circuit breaker, heater assembly, or both are tripped, go to Malfunction 2, Booster Pump Assembly.
Check if other pumps operate.
If other pumps are inoperable, go to Malfunction 1, ROWPU Assembly.
Visually check If relay K6 is ON or OFF.
If relay is OFF, go to step 7.
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.
Perform a continuity check 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.
T1, Heater Assembly
T2, Heater Assembly
T3, Heater Assembly.