GE D20 Installation And Operation Manual page 98

D20/D200
Installation and Operations Guide
Power-up and Test
Procedure Follow these steps to check that fail-over is functioning correctly for the event of
hardware failure:
Step
1
2
3
96
, continued
On the front of the RS-232 Panel, check that CCU A LED is
illuminated, which shows that CCU A is Active.
Note: Both the PWR A and PWR B LEDs should be illuminated.
To simulate hardware failure, switch off the Active D20/D200 at the
main power switch on the front of the unit.
Results: If the RS-232 is functioning correctly, then it will switch over
to the Standby unit and the CCU B LED will illuminate and
the CCU A LED will go off.
Verify the fail-over. See "Procedure", page 98.
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