TM 10-4610-241-24
TO 40W4-13-42
Table 2-2. Unit Troubleshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
BACKWASH PUMPASSEMBLY
1.
PUMP ASSEMBLY IS NOISY.
Notify Direct Support Maintenance if this malfunction occurs.
2.
PUMP ASSEMBLY RUNS HOT.
Step 1. Turn circuit breaker CB2 to OFF and disconnect pump cable at junction box.
WARNING
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 2. Turn CB2 to ON and check for 208 VAC three phase power at BACKWASH PUMP NO
2jack, J2.
If 208 VAC is not measured in all three tests, A-B, A-C and B-C, notify Direct
Support Maintenance.
Step 3. Disconnect cable assembly at backwash pump (Paragraph 2-16). Check cable for
continuity.
a.
If defective (open), replace cable assembly. Refer to Paragraph 2-16.
b.
If cable assembly is not defective, replace centrifugal pump. Refer' to Paragraph 2- 17.
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