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Instrument lighting With a rotary button (INSTRUMENT) in the left-hand section of the instrument panel the internal lighting of the instruments is switched on and its brightness is adjusted. Pitot heating The Pitot probe, which provides measurement for the Pitot-static system, is electrically heated. The heating is activated with a switch (PITOT) on the row of switches on the instrument panel. The temperature is automatically kept constant by means of a thermal switch on the Pitot probe, and as an additional safety measure a thermal fuse is built in. If this thermal fuse is activated, the Pitot heating can no longer be switched on, and the Pitot heating caution will be displayed. In this case the system should be serviced. The Pitot heat caution light is also on if the Pitot heating is switched off. Doc. No. 6.01.05-E Revision 3 26-May-2003 Page 7 - 44
Sensors installed are:
The following signals are transmitted to the annunciator panel installed in the instrument panel: Normally the engine is controlled and regulated by the ECU A. The ECU B is a backup system to ensure redundancy. In case of an internal error during operation or the loss of a sensor signal the system automatically switches to the ECU B. If the loss of the sensor signal was the cause for the error, the system automatically switches back to ECU A.
Testing the annunciator panel In the process of the pre-flight check, proper functioning of the annunciator panel must be verified. This functional check is automatically started after switching the ELECTRIC MASTER to ON. All lights are flashed, and the aural alert is muted. By pressing the 'acknowledge' button, the lights are extinguished, and a momentary aural alert is sounded. This test verifies functionality of the microprocessor, the lights, and the aural signal. 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：钻石40飞机飞行手册 DA 40 Airplane Flight Manual(70) |
