8 SYSTEM OPERATION
The RES is controlled by the following:
• Guarded RES master switch.
• Display and Control Unit interface.
• Battery selection switch.
Guarded RES master switch
The guarded RES master switch is a guarded switch on the instrument panel controlling the
12 V power supply to the RES. A battery selector switch enables the pilot to select 12 V from
either of the removable 12 V batteries.
Figure 8-1 Guarded RES master switch
NOTE: The HV batteries cannot be enabled without the external 12 V power supply to
the system. When the HV power rail has been activated the selected 12 V
battery can be charged with a built-in DC-DC converted.
When the guarded RES master switch is switched ON, the built-in test procedure is initiated
and the system will enter standby mode with the HV batteries not activated.
When the guarded RES master switch is switched OFF power to all RES systems except
temperature monitoring is disconnected.
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