|
| |
TM 5-4120-287-15
3-18. Excessive Cooling
Probable cause
Possible remedy
Temperature control variable resistor set too low.
Adjust variable resistor for higher temperature.
Thermostat defective
Replace thermostat (para. 3-39).
3-19. Excessive Heating
Probable cause
Possible remedy
Temperature control variable resistor set too high
Adjust variable resistor for lower temperature.
Thermostat defective
Replace thermostat (para. 3-39)
3-20. No Temperature Regulation in any Control Position
Probable cause
Possible remedy
Thermostat faulty
Replace thermostat (para. 3-39).
Temperature control variable resistor (located
Replace temperature control variable resistor
in remote control box) defective.
Defective remote control box wiring harness.
Replace wiring harness connecting remote control box
assembly to electrical tray panel (para. 3-41).
Section VI. HOUSING PANELS
3-21. General
The air conditioner is enclosed with sheet aluminum panels mounted to the frame with either quarter-turn stud fasteners, or
phillip-head bolts. Evaporator section housing panels are insulated with layers of sponge rubber cemented directly to the
interior face of the panels. All panel contact edges are sealed with a continuous strip of ribbed gasket material. The air
inlets and outlets have removable expanded metal screens spot-welded to their respective panel assemblies.
3-22. General Maintenance Procedures
The following procedures pertain to all panel assemblies installed on the air conditioner. Procedures peculiar to a
particular panel assembly are included within the paragraph dealing with that panel assembly.
CAUTION
Before removing or installing any panel assembly disconnect the power source from the air conditioner.
a.
Cleaning. Clean all parts with an approved cleaning solvent.
b.
Inspection.
(1) Inspect the panel assembly for dents, cracks, and other signs of structural damage.
(2) Inspect insulation and gaskets for security, damage, and deterioration.
(3) Check the stud fasteners for broken, bent, or missing cross pins, washers, springs, and seals.
(4) Inspect the panel assembly for chipped and worn paint.
c.
Repair and Replacement.
(1) Panel assemblies. Repair or replace a damaged panel assembly if the damage is such that the assembly does
not seal properly against the frame assembly; permitting the air conditioner interior to be contaminated by foreign matter or
the elements. Refer damage beyond scope of organizational maintenance to direct support maintenance.
(2) Insulation and Gaskets. Panel assemblies which have damaged insulation and/or gaskets must be repaired, see
maintenance allocation chart for scope of organizational maintenance. If the insulation or gasket is loose, it can be
fastened with cement, MIL Spec MIL-C-4003.
(3) Quarter-turn fastener assembly. Replace damaged stud fasteners (fig. 3-6) as follows:
(a) Compress the stud fastener and remove it from the panel grommet assembly.
(b) Remove the stud assembly seal from the stud fastener grommet.
(c) Install a new seal on the stud assembly spring cup.
(d) Compress the stud fastener and install it in the panel grommet assembly.
(4) Repaint worn, chipped, or peeling paint as follows:
(a) Remove loose paint with a wire brush.
3-11
|
