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 TM 55-1905-242-14
0050 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ALARM SYSTEMS (continued)
2. Engine alarm inoperative
2.
If 24 Vdc is present on
(continued).
both sides of the fuel
switch, or on neither side
of the fuel switch, use the
wiring diagram in FO-2 to
locate the OPEN circuit.
Repair the OPEN circuit.
3. Fire detection system
Disconnect the fire and smoke detectors
1.
If disconnecting a fire and
alerts when no problem
one at a time and observe the alarm signal.
smoke detector causes the
exists.
alarm to cease, replace that
sensor.
2.
If disconnecting the fire and
smoke detectors does not
cause the alarm to cease,
use the wiring diagram in
FO-2 to locate the OPEN
circuit. Repair the OPEN
circuit.
BLACK WATER SYSTEM
1. Black water pump will
1.
Check duckbill valves for obstruction.
Clear obstructions from the
not pump.
duckbill valves.
2.
Check the connection between the motor and
Repair the motor/eccentric
the eccentric for any disconnected condition.
connection as necessary.
2. Black water pump will
1.
Check for any binding at the bellows assembly.
Free the bellows assembly.
not run.
2.
Use multimeter to check for available voltage
If 24 Vdc is not available,
(24 Vdc).
troubleshoot the electrical
system (WP 0033 00).
3. Black water pump stops
1.
Check for any binding in the bellows assembly.
Free the bellows assembly.
pumping before the tank
is empty.
2.
Check the duckbill valves for obstruction.
Clear obstructions from the
duckbill valves.
3.
Check the connection between the motor and
Repair the motor/eccentric
the eccentric for any disconnected condition.
connection as necessary.
ELECTRIC TOILET
1. Electric toilet will not
1.
Use multimeter to check for 24 Vdc at the flush
If 24 Vdc is not present,
flush.
switch.
troubleshoot the 24 Vdc
electric system (WP
2.
Check for stoppage at impeller or macerator
Clear blockage from impeller
blade.
or macerator blade.
0050 00-2
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