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 TM 55-1905-242-14
0050 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WINDSHIELD DE-ICER (continued)
4.
Open the junction box at the base of the center
1.
If corrosion or loose
windshield and check the inoperative de-icer's
connections are present,
wiring connections for 110 VAC, corrosion, or
repair the corrosion and/or
loose connections.
loose connection.
2.
If 110 Vac is present, replace
the cable between the
junction box and the
de-icer unit's control box
(on windshield).
2.
All three windshield
1.
Check that the de-icer switch in the pilothouse
de-icer panels
is in the ON position.
inoperative at the same
time.
2.
Check that shore power is available or that the
1.
Connect shore power or
generator is online.
bring generator online.
3.
Check that the Feed to 110V XFMR circuit
1.
Set to ON the Feed to 110V
breaker is in the ON position.
XFMR circuit breaker.
4.
Check that the De-Icer circuit breaker is in
1.
Set to ON the De-icer circuit
the ON position.
breaker.
5.
Remove the cover from the de-icer switch and
1.
If 110 Vac is available on
check for 110 Vac on both sides of the de-icer
both sides of the de-icer
switch with de-icer switch in the ON position.
switch, remove the cover
from the junction box at the
base of the windshield and
check for 110 Vac at the
junction box.
a.
If 110 Vac is available
at the junction box,
check the individual
de-icer assemblies
per the One De-icer
Panel Will Not
Operate procedure
in this work package.
b.
If 110 Vac is not
available at the
junction box, use the
wiring diagram in
FO-1 to locate the
OPEN circuit. Repair
the OPEN circuit.
2.
If 110 Vac is available on the
supply side of the de-icer
switch, but not on load side
of the de-icer switch, replace
de-icer switch.
0050 00-6
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