Installation Manual

Limited keyboard functions If possible, perform a local keyboard test to verify operation of
all keys. If a local test cannot be performed, replace the
keyboard. The installer or system administrator should review
the PC-based configuration software package s lockout tables to
determine if the problem is related to user restriction tables. If
the table settings are verified, and no discrepancies are found,
replace the keyboard.
Allegiant keyboard joystick is not centered If the analog joystick of the keyboard becomes uncentered due
to normal wear, it can be recalibrated. If using Intuikey Series
Keyboards, calibration is done via the Keyboard Control menu. If
using LTC 8555 Series Keyboards, activate the Keyboard User
Function 1 keyboard test. Refer to the Operator s Manual for
more information.
Table 9.1: Troubleshooting Guidelines
Component Configuration Worst-case Effect of Failure
Standard System Configuration
Worst-case Effect of Failure Redundant
System
System Controller PC Not Applicable Hot-switch and Data Mirroring functions are
unavailable. The System is completely
operational.
CPU or CPU Power Supply Complete loss of all system
operations and functions
Automatic hot-switch to backup. System
completely operational. LTC 8901 Series
buzzers sound, fault LEDs illuminate, and
appropriate fault relays close. The System
Supervisor software flashes and beeps to
alert the operator.
LAN Switch, CPU Port Not Applicable Automatic hot-switch to backup occurs. The
System is completely operational. System
Supervisor software flashes and beeps to
alert operator.
LAN Switch, Video Bay Port Loss of video connected to bay; the
remainder of the system is
operational.
Loss of video connected to bay; the
remainder of the system is operational.
LAN Switch, Entire Switch Loss of video associated with all
matrix bays connected to the switch;
if the system contains multiple
switches, the remainder of the
system is unaffected.
Automatic hot-switch to backup occurs.
There is loss of video on all bays connected
to defective LAN Switch. The System
Supervisor software flashes and beeps to
alert the operator.
Output Bay Loss of video connected to the bay;
the remainder of the system is
operational.
Loss of video connected to bay; the
remainder of the system is operational.
Input Bay Loss of video connected to the bay;
the remainder of the system is
operational.
Loss of video connected to bay; the
remainder of the system is operational.
Table 9.2: Trouble Modes
LTC 8900 Series Troubleshooting Guide | en 101
Bosch Security Systems, Inc. Installation Manual 2016.04 | 10.7 | F.01U.323.096