ABB FBVi-2U4-4T - APPENDIX: Troubleshooting; CONTROLLER STATE; LED LIGHT INDICATORS; AIRFLOW FAILURE

FBVi-2U4-4T | APPENDIX: Trouble
©ABB 2021 All Rights Reserved.
Subject to change without notice
WWW.CYLON.COM
101
MAN0148 rev 5
10 APPENDIX: Troubleshooting
CONTROLLER STATE
LED LIGHT INDICATORS
Off
On
Slow Blink
Fast blink
Red LED
(Power)
Power is
off
Power is on
-------- Unit Rebooting -------
Green LED
(Status)
Unit is not
running
Strategy Loaded but no
network connectivity
Strategy Loaded and device
communicating on network
No Strategy
loaded
COMM LOSS
Check that the wiring is correct.
Check that the device instance is not duplicated on the network.
WIRED CBT STAT FAILURE
Check the device is wired correctly.
AIRFLOW FAILURE
Check that the airflow tubes are connected to the device from the airflow sensor.
Check that there are no airflow blockages on the airflow sensor.
Check that the damper is open, and the air handler is running.
DAMPER FAILURE
Check that the damperOfflineAlarm (D229) is not on. This would indicate a communication error with the
damper.
Check the linkage connecting the damper to the device is tight.
Check that no debris is preventing the damper from opening or closing.
FAN FAILURE
Check that the unit configuration is set up for either On/Off or analog control of a fan.
Check that the correct output is controlling the fan, and it is wired correctly.
Check that no debris is preventing the fan from operating.
DUCT HEAT FAILURE
Check that the unit configuration is set up for either On/Off or analog control of the heat.
Check that the correct output is controlling the heating element, and it is wired correctly.