TM 9-4120-411-14
Table 2-1. Operator Preventive Maintenance Checks and Services for FDECU.
NOTE
If the FDECU must be kept in operation during a scheduled PMCS interval, perform
only those procedures that will not disturb operation then perform remaining
procedures when the unit can be shut down.
Item
Interval
Item to be
Procedure
"Not Fully Mission
No.
Checked or Serviced
Capable If":
1
Before
Flexible Ducts
Inspect for worn or torn spots and for se-
Loose from unit or shelter.
cure attachment to unit and shelter. If
loose, notify unit maintenance to secure
Torn to the point that it
it.
will not carry air to
shelter.
2
Before
Outside Coil
Inspect for dirt or obstruction to coil. Re-
Coil is obstructed or
move obstruction or notify unit mainte-
dirty to the point of
nance to clean as necessary.
causing obstruction.
3
Before
Outside Fan
Check th at fan is securely attached to mo- Fan is loose on motor
tor. If loose, notify unit maintenance to se- shaft.
cure it.
NOTE
Two different liquid indicators can
be used and each has a unique cen-
ter indicator color.
4
Before
Liquid Indicator
Unclip quick release pin and raise fan
Liquid indicator port
cover door to inspect liquid indicator port
cracked or center indi-
for cracks and note center indicator color.
cator color is yellow or
If cracked or center indicator color is red
red, depending on liq-
or yellow, depending on liquid indicator
uid indicator being
being used, notify unit maintenance who
used.
will verify and notify direct support
maintenance. Secure fan cover with
quick release pin.
5
Before
Control Panel
Check the control panel for damage to
Damage that would
knob, switch, or push button. Notify unit
prevent safe operation
maintenance if damaged.
of equipment.
6
During
Liquid Indicator
Unclip quick release pin and raise fan
Liquid indicator port
cover door to inspect liquid indicator port
shows constant bubbles
for constant bubbles, foam, or if center in-
foam, or center indica-
dicator color is red or yellow, depending
tor color is yellow or
on liquid indicator being used. If th is con-
red, depending on liq-
dition occurs, notify unit maintenance
uid indicator being
who will verify and notify direct support
used.
maintenance. Secure fan cover with
quick release pin.
2-5