CIE-A-200 Control Panel Engineering and Commissioning Manual
57
General Fault Finding
Common Faults
In the event that inexplicable or random faults continue after any obvious indication has been dealt with, take
the following steps.
1.
Verify that the addressable device loop cable readings are correct and suitable. Take particular note
of the screen resistance and rectify any faults found. Ensure also that there is no connection from the
screen to earth in the building other than at the relevant terminals at the control panel.
2.
Also check for connection from screen to the building structure which may not be earthed (eg.
concrete, plaster, suspended ceilings) as such connections can inject noise into the screen causing
communication problems.
3.
Ensure the correct number of devices has been initialised by checking at Access Level 3 (Engineer)
for the number of devices found on the last initialisation, and compare that with the number of devices
programmed onto the system.
4.
Ensure that Loop End 1 and Loop End 2 are connected correctly and not running in reverse.
5.
Reconfigure the addressable devices using the reconfigure
prompt at Access Level 3 (Engineer),
then reset the system and test it. (only if all devices are found)
6.
Check all devices for loose connections, broken copper connecting strips in the connector, broken
connector bodies.
