TM 10-4610-241-24
TO 40W4-13-42
Table 2-2. Unit Troubleshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
DISTRIBUTION PUMP ASSEMBLY
1.
PUMP MOTOR RUNS HOT.
Step 1. Check suction hose for blockage.
If suction hose is blocked, clean out suction hose between product water tank
and distribution pump assembly.
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 circuit breaker CB5 to OFF and disconnect pump cable assembly
at DISTRIBUTION PUMP jack, J5 on junction box.
Step 3 Turn CB5 to ON and check for 208 VAC, three phase power at J5.
If 208 VAC is not measured in all three tests (A-B, A-C and B-C), notify
Direct Support Maintenance.
Step 4. Disconnect cable assembly at motor of distribution pump (Paragraph 2-21). Check
cable for continuity.
a.
If cable assembly is defective (open), replace it. Refer to Paragraph 2-21.
b.
If pump cable is not defective, replace centrifugal pump Refer to Paragraph 2-22.
2
PUMP ASSEMBLY IS NOISY.
Notify Direct Support Maintenance if this malfunction occurs.
3.
PUMP ASSEMBLY SHUTS DOWN AND.IOR FAILS TO START.
Step 1. Check if circuit breaker CB5 and/or heater assembly injunction box are OFF. Heater
assembly is tripped if resistance is felt when reset plunger is pushed in.
a.
IfCB5 and/or heater assembly are not OFF, continue with step 2.
b.
If CB5 and/or heater assembly are OFF, go to step 5.
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