GREER Company MicroGuard 586 - Communication Indicator

GREER Company
1918 East Glenwood Place
Santa Ana CA 92705
Page 31 of 44
MicroGuard
®
586 Operation/Setup Manual
W458200 REV C 10/29/02
Communication Indicator
The Communication Indicator provides an indication of the success or otherwise of communication with the
display console, and of the running state of the computer program.
Carefully observe the Communication indicator and the display console at power on and through self-test, and
then use the following chart to help decide the course of action.
COMMUNICATION INDICATOR
indications at power ON
ACTION
From the moment the system power is applied,
the COMM indicator does not illuminate. During
and after the self-test period of eight seconds, the
COMM indicator remains off.
The computer is not running.
Check status indicators (D2 through D6).
Try to reset the system by powering off and on
again. Listen to the computer for the relays to
click. If they do not click, replace the System Chip
- If not successful, replace the computer.
If the relays do click, replace Communication
chips IC1, 2.
From the moment the system power is applied,
the COMM indicator does not illuminate. The
display console, which never goes to normal,
continually reads: "No Communication with
MicroGuard."
Communication with the display has not been
made.
Is the display console connected?
Check connector and cabling to the display
console.
At the moment power is applied, the COMM
indicator flashes briefly, then switches off. After a
few seconds, the COMM indicator starts to flash
at a fast rate and never stops.
This is the normal operation of the
communication between the computer and
display console.