TM 10-4610-241-24
TO 40W4-13-42
Table 3-1. Direct Support Troubleshooting-continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
DISTRIBUTION PUMP ASSEMBLY- continued
WARNING
High voltages in this equipment can cause serious injury or death. When applying power
during a rest, 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 6.
Remove power at power source, disconnect distribution pump cable and check if continuity exists through
pump cable assembly (Paragraph 3-15).
a.
If continuity exists through cable assembly, repair centrifugal pump. Refer to Paragraph 3-16.
b.
If continuity does not exist, repair pump cable assembly. Refer to Paragraph 3-15.
Step 7.
Check for continuity of control circuits as follows. Make additional point-to-point checks as necessary to
isolate fault to a specific component:
NOTE
To. measure continuity through K5 contacts, it is necessary to physically close contacts
by pushing in on relay plunger.
L3, CB4
J9(P)
P9(P)
P9(G)
P9(H)
J8(G)
J8(H)
K5(2)
J1
J10
K5(A2)
J8(P)
J9(G) and (H)
P8(P)
P8(G)
P8(H)
K5(2)
K5(3)
K5(A2) (see above note)
K5(Al)
K5(A1) Models WPES-20 and H-9518-2 only
K5(Al) (Required value is 450-600 ohms)
a.
If continuity does not exist through switches S13 and S5 (switches closed) replace defective switch.
Refer to Paragraph 3-49,
b.
If continuity does not exist through circuit breaker CB9 (CB9 ON), replace CB9. Refer to Paragraph
3-53.
c.
If continuity does not exist through heater assembly, replace defective heater (Paragraph 3-53) and
reset heater assembly.
3-28 Change 1
