Bosch Appliances LTC 8600, LTC 8800 Troubleshooting Guide, 22.1Main Bay Checkout, LED Name

102 en LTC 8600 LTC 8800 Series

22 Troubleshooting Guide

The Allegiant system has been designed to perform reliably for long periods of time. All circuitry consists of state-of-the-art components designed around a modular concept. The modular concept allows quick location and replacement of suspect circuits. If system troubleshooting becomes necessary, follow the guidelines:

22.1Main Bay Checkout

1.Main power switch is ON and power LED indicator is not lit: Check main line fuse on rear of main bay. Refer to Maintenance Information Section for replace- ment instructions.

2.Any of the green LED indicators located on the front of the main power supply is out: Replace blown fuses associated with any unit fuse indicators.

3.The CPU contains several LEDs that are used to indicate its health and status. Please refer to chart below for details:

LED Name	Functional Description / Troubleshooting Information
CPU ACT.	Random green blinking indicates normal CPU activity. If always ON or always
	OFF, the CPU is not functioning due to a serious problem with the CPU or the
	system power supply.
BATT LOW	Lights red to indicate low or dead CPU battery condition. Replace batteries,
	per procedure described in Maintenance Information section.
TEMP CRIT	Lights red to indicate extremely high or extremely low CPU temperature con-
	dition. This would occur if the system is installed in an unsuitable environ-
	ment or if there is a serious fault with the CPU causing it to overheat.
LAN LINk/ACT	Not used.
LAN 100BASET	Not used.
LAN DUP/COL	Not used.
SDU ACT	Random green flashing indicates control data is being sent out Biphase port.
CONSOLE	Lights green to indicate device is attached to system RS-232 CONSOLE port.
PRINTER	Lights green to indicate device is attached to system RS-232 PRINTER port.
ALARM	Lights green to indicate device is attached to system RS-232 ALARM port.
LED1	Lights RED when data is being written to FLASH memory. This would occur
	whenever changes are made to user-defined settings, such as camera title
	programming, alarm table re-configurations, downloads from Master Control
	Software, etc.
LED2	Not used.
LED3	Not used.
LED4	Not used.
LED5	Not used.
LED6	Not used.
LED7	Not used.
LED8	Random green blinking indicates normal keyboard polling communication
	activity. If not blinking, it would indicate a problem with the CPU.

4.Intermittent video output or system operation: Verify all circuit card modules are properly seated in their respective rack connectors.

5.Power Supply LEDs lit, but no power indication on modules or accessory devices: Verify proper seating of power supply within the card cage. Verify that supplied retaining screws are installed.

Bosch Security Systems, Inc. Instruction Manual F.01U.127.393 2.0 2009.03