ABB Arc Guard System TVOC-2 Installation And Maintenance Manual page 60

Trouble shooting
58
Error code Description
0 72 0 0 0 0 CSU21:
1)Optional cable is damaged.
2)Overcurrent longer than 10s.
3) Detector input damage at Arc
Monitor.
4) LED at CSU is damaged.
0 80 0 0 0 0 CSU22:
1)Optional cable is damaged
2)Overcurrent longer than 10s
3) Detector input damage at Arc
Monitor
4) CSU LED damage
2 0 0 0 0 0 CSU21:
Degenerated LED at CSU. The
CSU LED degeneration will only
be tested by a manual Diagnos-
tic Test (2.2 Perform Diagnostics)
made from HMI.
CSU LED degeneration will not
be tested by periodically diag-
nostics.
4 0 0 0 0 0 CSU22:
Degenerated LED at CSU. Diag-
nostic test will only be triggered
by a manual Diagnostic Test
made from HMI.
8 0 0 0 0 0 Lost contact with HMI.
32 0 0 0 0 0 Long light detection.
Recommended actions
Check that optional cable from
CSU is not damaged or
crushed.
Check current level setting if
setting is too low, then CSU is
indicating overcurrent too long
time period. Increase level and
see that you get light from
CSU, if no light from CSU then
LED at CSU is damaged. If
none of this then detector input
at Arc Monitor is corrupt.
See Error code 0 8 0 0 0 0.
CSU should be replaced due
to degenerated LED at CSU.
A light detector has detected
light during more than 10s.
Can the light detector have
been damaged or is there con-
stantly light leaking into the
cabinet.