O2- Kompmaster
Page 6
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Only for use in conjunction with an Aerotronic control unit. © EHS - Engineering 2003
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5.1 Internal Indicators
The LEDS are located at the positions illustrated and are allocated as follows:
Figure 4: Placement on the PCB
1) Operating voltage indicator: This LED must light continuously and indicates that
the internal supply of the control unit is correct.
2) Communication indicator: This LED lights up momentarily when the control
sends data to the control computer at the control computer’s request.
3) This LED indicates whether the sensor supply is applied correctly. This LED
must light continuously. If it does not light, the fuse of the sensor supply has
blown. In this case you must replace the fuse as described in the “Replacing the
Fuse” chapter.
Figure 5: Layout of the LEDs
