Maintenance, troubleshooting, messages
77
VMD460-NA_D00001_05_M_XXEN/01.2020
7.4 LEDs
The state of the VMD460-NA can be determined by means of the LEDs. The following
table provides an overview of the possibilities.
After rectifying the fault at the interface switch/main switch (e.g. manual connection of
the backup switch), the fault is automatically cleared.
LEDs
Meaning
Action
yellow flashes
yellow flashes
green flashes
Device start
Wait until the device is ready for opera-
tion
(approx. 5…8 s)
yellow off
yellow off
green lights
Normal operation: device in operation,
all the measured values are within the
specified limits
yellow lights
yellow lights
green lights
Alarm, limit value violated
yellow off
yellow lights
green lights
Alarm stopped, time
t
on
elapses
Wait until the time has elapsed
yellow flashes
yellow flashes
green lights
Error contact monitoring or internal
error
Check interface switch* ;
contact service in case of int. error
yellow off
yellow off
green flashes
Internal device error
Contact service
If, however, the same fault has occurred three times within 30 seconds,
normal operation must be started again after fault rectification by
press-
ing the "RESET" button
(on the standard display).
2
ALARM
1
ON
2
ALARM
1
ON
2
ALARM
1
ON
2
ALARM
1
ON
2
ALARM
1
ON
2
ALARM
1
ON
