
Rack Monitor 8800E/8801E
Document: Operation Manual
Date: 16-Jun-2011
Version: A.6
Page 13 of 35 H71343
LED (electronic light indicator) Display info at power up.
LED Test sequence.
During power up the Red Error indicator in the middle small bar will start flashing every ½ second to indicate no
communication is present.
When the main processor starts sending messages to the LED and LC-Display board the two Blue indicators will
start flashing inversely and the Red indicator will be switched off.
1. Middle Red
Communication error indicator
2. Two Blue
Communication indicator (flashing)
The LED test sequence will continue with:
3. Left White
Grounding indicator
4. Right White
Grounding indicator
5. Middle Red
Grounding error indicator
6. Left Yellow
Bypass indicator
7. Right Yellow
Bypass indicator
8. Middle Red
System error indicator
9. Red bar
Compartment 1 till 12 indicators
10. Green bar
Compartment 1 till 12 indicators
All indicators have been switched on and off and the LED display is ready to receive sensor data from the main
controller.
When no truck is connected all Red compartment indicators shall be on and a message will appear on the LC-
Display. The two blue communication indicators will flash inversely to indicate proper internal communication.
As soon as the plug is connected to a truck an extensive short and open circuitry test will be preformed and valid
ground verification will be shown by two inversely flashing white indicators ( see
Figure 1
).
After the auto switching mechanism has detected type and amount of sensors the indication of the Red and Green
LED indicator compartment bar will lit up accordingly.