2-8. UNUSUAL ENVIRONMENTAL/WEATHER. (Continued)
Severe damage may result if air conditioner is operated with a cover on the condenser assembly. Do
not cover or obstruct condenser fans or air inlet during operation.
(3) Cover the condenser assembly with canvas or other available material (such as camouflage bags) during
periods of shutdown.
e Operation in High Altitudes. The air conditioner is a sealed system and is not affected by a change in
f Operation in Snow, Mud. and Other Conditions. Snow, mud, and other extreme environmental conditions will
only affect the performance of the air conditioner if the flow of air through the condenser is hindered or the coil
cannot transfer heat due to dirt, mud, snow, etc.
2-9. EMERGENCY PROCEDURES.
a Loss of Primary Power From HMMWV. If primary power from the HMMWV is lost or intermittent, position
mode selector switch to OFF position to shutdown air conditioner. When primary power from the HMMWV is
b Partial Equipment Failure. Emergency procedures to be followed when partial equipment failure occurs are
provided in the following paragraphs. These paragraphs cannot list all possible partial equipment failures that
may occur. If equipment failures other than those identified occur, immediately notify your supervisor.
(1) Mode Selector Switch Failure. Disconnect power supply cable to shut down air conditioner. Notify your
(2) Thermostat Switch Failure. Monitor compartment temperature to ensure air conditioner is maintaining
temperature at proper levels to continue with intended mission. If proper temperature levels are
maintained, notify your supervisor and continue with mission. If proper temperature levels are not
maintained, position mode selector switch to OFF position to shutdown air conditioner and notify your
(3) Evaporator and Condenser Fans Not Operating. Position mode selector switch to OFF position to
shutdown air conditioner and notify your supervisor.
2-10. NUCLEAR, BIOLOGICAL, AND CHEMICAL (NBC) DECONTAMINATION.
The split pack air conditioner is not designed to operate in an NBC environment. Air from within the shelter is exchanged
with outside air. Refer to MIL-HDBK-116, Environmental Control of Small Shelters for additional general NBC
information. In addition, refer to Field Manual (FM) 3-100 (NBC Operations), FM 3-3 (NBC Contamination Avoidance),
FM 3-4 (NBC Protection), and FM 3-5 (NBC Decontamination). General interim NBC decontamination procedures should
be performed according to unit Standing Operating Procedures until NBC decontamination facilities are available.
electronics equipment. In addition, the air conditioner is designed, through the use of EMI/RFI filters and EMI gaskets, to
prevent an electro-magnetic signature from being emitted. Refer to FM 32-20, Electronic Warfare, for additional