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 TM 55-1905-242-14
0050 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
POTABLE WATER SYSTEM (continued)
4. Potable water pump will
5.
Check the housing for cracking.
Replace the housing if it is
not prime (continued).
damaged.
5. Potable water pump will
1.
Check for available voltage at pump. Must be
If available voltage is too
not shut off.
at least 21.6 Vdc.
low, troubleshoot the 24 Vdc
electric system (WP
2.
Check the impeller for damage.
Replace the impeller if it is
damaged.
3.
Check pressure switch setting. The setting
1.
Adjust the pressure switch if
should not exceed 22 lb/in (1.5 bar).
necessary.
2.
If the switch cannot be
adjusted, replace it.
4.
Check the check ball for improper seating.
Clean any debris from the
check ball housing.
WINDSHIELD DE-ICER
1. One windshield de-icer
1.
Visually inspect the de-icer assembly on the
1.
If de-icer assembly is cut or
panel will not operate.
windshield for cracks, cuts, or visible damage.
otherwise damaged, replace
the de-icer assembly on the
windshield.
2.
If de-icer is not cut or
otherwise damaged, proceed
to the next test/inspection.
2.
Remove the cover from the de-icer unit's
1.
If fuse is blown, replace fuse
control box (on windshield) and check fuse.
and re-check operation.
2.
If fuse blows again, replace
the de-icer assembly on
the windshield.
3.
If fuse is intact, proceed to
the next test/inspection.
3.
Turn ON the de-icer and check the voltage
1.
If 110 Vac is present, replace
across the black and white terminals in the
the de-icer assembly on the
de-icer unit's control box (on windshield).
windshield.
2.
If 110 Vac is not present,
proceed to the next test/
inspection.
0050 00-5
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