Table 3-1. Direct Support Troubleshooting-continued
TEST OR INSPECTION
RAW WATER PUMP ASSEMBLY NO. 2 - continued
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.
Disconnect cable assembly at pump motor (Paragraph 2-19) and check it for continuity.
If open, repair pump cable assembly. Refer to Paragraph 3-11.
If pump cable is not defective, repair centrifugal pump. Refer to Paragraph 3-12.
Check for continuity through control circuit as follows. Make additional continuity checks as necessary to
isolate fault to a specific component:
To measure continuity through K4 it is necessary to close K4 by physically pushing relay
J9(E) and (F)
K4(A2) (See note above)
K4(A2) (90-120 Ohms)
K4(A1) (Models WPES-20 and H-9518-2)
If switch S13 or S4 is open (switches ON), replace it. Refer to Paragraph 3-49.
If continuity does not exist through CB9 (CB9 ON), replace CB9. Refer to Paragraph 3-53.
If continuity does not exist through K3 contacts (2-3) and/or 90 to 120 Ohms is not measured from A2
to A1, replace motor starter. Refer to Paragraph 3-61.
3-74 Change 1