Technical data

System Controls 2-9
2.3 LED Indicator Lights
Figure 2-8 shows the location of the front panel LEDs on the Series 400 system units.
The Power LED indicates that the power is on. The Service LED, when on, indicates
that the system is in SERVICE mode. The LEDs labeled ‘A” through “H” indicate sys
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tem status. The Power LED and the LEDs labeled “A” through “D” are always visible.
You can view the other five LEDs by opening the door.
Figure 2-8. System Unit Front Panel LEDs