User manual

Digital Monitor AMC-1DBx Series User Manual
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6.3 LEDS
The user interface consists of 9 product LEDs, 4 power supply LEDs, and 3 Self-Test
indicators. Nine of the product LEDS are present on Front Panel and also the monitor
board itself. These include:
• System
• Fault
• Alarm1
• Alarm2
• Alarm3
• RS-485 TX
• RS-485 RX
• Ethernet Activity
• Ethernet Speed/Collision
Inside the cabinet there are four power supply LEDs (CH1-CH4 V+) one for each 24v
MODBUS channel. Also inside the cabinet are 3 Self-Test LEDs (D1-D3).
6.3.1 System LED
The System LED is lit when the system is up and running without problem. This LED will
turn off under the following conditions:
• Startup operation,
• Runtime operation after watchdog or brown-out reset,
• IP or BACnet duplication or configuration fault.
During startup the System LED will turn on and off as self-test and system startup
progresses. During start-up and at various times the self-test indicators D1-D3 may be
light up. If these self-test LEDs remain lit a hardware problem exists and this system
fault must be reported to qualified technician for repair.
The System LED will turn off and remain off during system operation when the reset
cause indicates a watchdog or brown-out reset. A watchdog reset indicates software
operation was unable to process the operation of the system. A brown-out reset occurs
when the internal VDD power supply drops below 3v. A watchdog or brown-out reset
must be reported to qualified technician. This fault can be cleared by pressing the HOLD
pushbutton.
The System LED will turn off when the system detects duplication or configuration
problem with the IP and/or BACnet interfaces. The buzzer and External Annuniciator will
also be activated as a Pulse or Continuous as defined by the Option Audio Cadence
configuration.
6.3.2 Fault LED
The Fault LED is illuminated when a device failure is detected by the system. Device
failure could be: