TM 9-4120-404-14
Table 3-2. Unit Preventive Maintenance Checks and Services (PMCS)
Item
Interval
Item To Be
No.
M
Q
A
Inspected
Procedure
6
Heating Elements
Test each heating element (2) per para.
and Heater Cutout
Switch - Continued.
Inspect wire leads for heater elements (2)
and heater cutout switch for cracked or
burned insulation and for loose connect-
ions. (See para. 3-29.)
Check heating elements (2) for cracked
or damaged surfaces.
7
Heater Relay
Inspect heater relay for cracked, burned,
or loose wire leads.
8
Condensate Drain
Remove conditioned air louver per para.
Assembly
Check that all drain holes in drain pan
are clear and not clogged. Clean any
clogged drain holes and remove any
debris from drain pan.
Inspect all drain tubing for cuts and
cracks.
Check for loose or missing tube clamps.
Check for broken or leaking elbows and
tees.
9
Evaporator Fan
Remove return air louver per para. 3-21.
Assembly
Inspect for loose or missing hardware.
10
Evaporator Fan
Remove return air louver per para. 3-21.
Scrolls
Inspect scrolls for dents, cracks, or
bent metal.
Check for loose or missing mounting
hardware.
3-20
