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) R FUEL  Amber caution light indicating low fuel level in the right fuel tank. A fuel level switch in the right fuel tank operates the caution light. The caution light starts to flash when the fuel level in the right fuel tank is low. It illuminates permanently when the fuel level (usable) in the right fuel tank falls below 3 US gal (±1 US gal).
) START  Red warning light indicating that the starter solenoid is energized. The warning light receives an electrical current from the starter side of the starter solenoid. It illuminates when the starter is being operated or when the connection between the starter motor and the engine has not been broken. This occurs when the pinion of the starter motor remains engaged with the propeller flywheel.
Doc # 6.02.01 Page 1
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Figure 1: Central Warning System: DAI Annunciator Panel
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Indicating Systems
AMM

DA 40 Series

) PITOT  Amber caution light indicating that the Pitot heating system is OFF. The caution light receives an electrical current from the heater side of the Pitot heat relay. The Pitot heating caution light is illuminated when the Pitot heating is not switched ON, or when there is a failure of the Pitot heating system. Prolonged operation of the Pitot heating on the ground can also cause the Pitot heating caution light to illuminate. In this case it indicates the activation of the thermal switch, which prevents overheating of the Pitot heating system on the ground. This is a normal function of the system. After a cooling period, the heating system will be switched on again automatically. 
) ALT  Red warning light indicating alternator failure. The warning light is operated by the voltage regulator. 
) VOLT  Amber caution light indicating low voltage at main bus. The caution light is operated when the voltage falls below 24 volts. It goes out again when the voltage exceeds 25 volts. 
) DOOR  Red warning light indicating the canopy/door is unlocked. Micro-switches connected in series operate the warning light when either the door or canopy is unlocked. 
) IGN  This light is only used when the LASAR ignition system is installed. 
White status light indicating that the LASAR ignition system is in back-up mode. The LASAR control unit operates the status light when the LASAR system is in back-up (manual) mode. Refer to the equipment manufacturer's manuals for more data on the LASAR system. 

(2) Test Switch
Select and hold the test switch to ANN TEST position to test the warning lamp filaments.
(3) Wiring Diagrams
Refer to Chapter 92 for the wiring diagrams for the central warning systems.
Doc # 6.02.01 Page 3
Rev. 4 09 Jan 2003

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B. White Wire Annunciator Panel
(1) Warning Messages
A warning is indicated by a continuous aural alert (sounded in the airplane's intercomm system), flashing of the red WARNING light, and flashing of the red warning light associated with the affected system.
By pressing the 'acknowledge' button, which is now illuminated green, the aural alert will be terminated, and the WARNING light will be extinguished. The warning light associated with the affected system will change from flashing to solid illumination.
(2) Caution Messages
A caution is indicated by a short aural alert (sounded in the airplane's intercomm system), flashing of the amber CAUTION light, and flashing of the amber caution light associated with the affected system.
By pressing the 'acknowledge' button, which is now illuminated green, the CAUTION light will be extinguished. The caution light associated with the affected system will change from flashing to solid illumination.
The LOW FUEL caution message is displayed in a slightly different manner (extended functionality), which is described below.
　
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