TM 10-5410-228-24
1.16 HYDRAULIC SYSTEM Continued.
Placing the control switches in the position corresponding to the above modes opens solenoid valves SV2 and
SV6 and closes solenoid valve SV9 by applying +24 Vdc to the coils. When the thermostat opens, the cool
mode is shut down. This is accomplished by de-energizing (closing) solenoid valve SV4 and stopping the
compressor motor, M1A.
Valve
SV1
SV2
SV4
SV5
SV6
SV7
SV8
SV9
Energized State
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
Position
Closed
Open
Closed
Closed
Open
Open
Closed
Closed
Figure 1-31. Static Mode, External Power, Cool Mode, Thermostat Open, NBC Off
