TM 9-4120-360-14
(2) Secure the control panel assembly to the mounting braclcets on top of the junction box, using four screws
through the corners of the mounting flange.
(3) Connect wiring harness plug to the receptacle on the left end of the control panel assembly.
c. Insert the air filter into the retaining channel, and install retaining strip, the a position the air intake grille on
the air conditioner. Secure it by turning six cam-lock studs clockwise.
d. Install the lower panel on the air conditioner, and secure it with the two panel fastener screws in the upper
edge.
e. Evacuate and charge the system as directed in paragraphs 5.25 and 5.26. pressure teat as indicated in
f. Close service valves and remove gauges. Install caps on valves. Install fresh air screen and secure with five
screws.
Section VI. PRESSURE CUTOUT SWITCHES
5.36. Description
The high-pressure and the low-pressure cutout switches are protective devices which interrupt electrical power to the
compressor wherever refrigerant system pressure becomes too high or too low to permit safe, efficient operation. The
pressure Connections to the switches are made by means of capillary tubes to the discharge side and suction side of the
compressor. Electrically, the two switches are. connected in series between the mode selector switch and the compressor.
Both switches reequipped with manual reset buttons. The pressure cutout switches are located next to the fresh air inlet
screen on the back of the air conditioner.
5.37. Preliminary Check
Check electrical operation of the pressure cutout switches in the following manner.
a. With the air conditioner operating in the cooling mode, install a yoke-type ammeter around the power supply
cable. Note the reading.
b. Press then release each of the pressure cutout met buttons while watching the ammeter. The ammeter
reading should drop when each reset button is pressed, and return to its original reading when the button is released.
c. If the ammeter does not respond when each button is pressed and released, replace the proper presure cutout
switch.
5.38. Removal
Remove the pressure cutout switches from the air conditioner as indicated below:
Disconnect power from the air conditioner before performing maintenance on the electrical system.
The voltage used can be lethal.
a. Remove five screws from the frame of the fresh air screen, and remove the screen.
NOTE
In accordance with Environmental Protection Agency regulations, refrigerants cannot be discharged into
the atmosphere. A refrigerant recovery and recycling unit must be used whenever discharging the system.
Operation of the recovery/recycling unit must be by AUTHORIZED PERSONNEL ONLY.
b. Discharge all refiigerant from the system in accordance with the following instructions:
