Communication Diagnostics; Table 17 - Communication Status Leds - Keyscan CA250 Series Technical Manual

Communication Diagnostics

The PC109x control boards have Communication Status LEDs and a System Status LED, which indicate the
current communication status.
Communication Status LEDs
The CA250B, CA4500B, CA8500B, EC1500B, EC2500B, CB-485, and CPB-10-2 have communication LEDs for
diagnostics and troubleshooting. The table below outlines the LED and its diagnostic function. When calling
Keyscan technical support, indicating the LEDs state assists our technicians in isolating potential difficulties.
All CA & EC Control Boards
LED State of LED
Flashing: Normal
TD 1 - Green
Not Illuminated – Abnormal
condition
Illuminated – Abnormal
condition
Flashing: Normal
RD 1 - Red
Not Illuminated – Abnormal
condition
Illuminated – Abnormal
condition
Flashing: Normal
TD 2 – Green
Not Illuminated:
Illuminated: Abnormal
condition
Flashing: Normal
RD 2 – Red
Not Illuminated:
Illuminated: Abnormal
condition
Keyscan Technical Guide (PC109x - 04.12)
Table 17 – Communication Status LEDs
Notes
If jumper ON J16 – pin 8, main processor sending data to on-board
supervised inputs processor only
If jumper OFF J16 – pin 8, main processor sending data to on-board
supervised inputs processor and IOCB modules connected to TB2
Follow Restore Factory Defaults J1 procedure in attempt to resolve.
Follow Restore Factory Defaults J1 procedure in attempt to resolve.
If jumper ON J16 – pin 8, main processor receiving data from on-board
supervised inputs processor only
If jumper OFF J16 – pin 8, main processor receiving data from on-board
supervised inputs processor and IOCB modules connected to TB2
Follow Restore Factory Defaults J1 procedure in attempt to resolve
Follow Restore Factory Defaults J1 procedure in attempt to resolve
Control board sending global, inter-panel communication data to CM
module connected to H2 header
If CM module not connected to H2 header
If CM module not communicating
Follow Restore Factory Defaults J1 procedure in attempt to resolve
Control board receiving data from CM module connected to H2 header for
global, inter-panel communication
If CM module not connected to H2 header
If CM module not communicating
Possible fault on CM module
Possible wiring fault
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