ABB Arc Guard System TVOC-2 Installation And Maintenance Manual page 56

Maintenance
54
Note!
In order to prevent a shut-down of the whole switchgear during the mainte-
nance process, replace the breakers which are connected to the Arc Monitor
with test breakers. This can be done by replacing the terminal to K4, K5, K6
with the test breakers.
Do remember to replace the test breakers with terminal breaker K4, K5, K6
after testing!
The maintenance procedure to check the detectors and Arc Monitor is the
same as for a Start-Up of the system for the first time.
Note!
See in chapter Installation, "Controlling" on page - 51
To check the light from Current Sensing Unit, CSU.
Perform a manual diagnostic via the HMI to check if the light from CSU is
degenerating. This will show as a notification window in HMI with an Error
code.
Note!
See "2.2 Perform Diagnostics" on page - 68, about how to perform a man-
ual diagnostics.
See "List of error codes" on page - 57, about error codes.