If the concentration at one or more transmitters exceeds an alarm
threshold:
Alarms A1, A2 and A3 are not self-locking and cannot be acknowledged.
1 The LED on the central unit and on the transmitter concerned flashes
according to the particular alarm; see table.
Display on central unit e.g.:
If several transmitters are in alarm state at the same time, all the
transmitters in alarm state will be shown on the display one after the other.
● The alarm relays are switched according to the particular alarm; see table.
Alarm states table (factory default settings)
Once the concentration drops below the A1, A2 or A3 alarm threshold
less hysteresis again, the LED on the transmitter and on the central unit is
extinguished and the relays are returned to the normal state.
Alarm A4 can be acknowledged:
– The acoustic warning on the central unit can be switched off:
● Press the [ u ] key on the central unit. The acoustic warning on the
central unit is then switched off and Relay 4 returns to the normal state.
Press the [ t ] key on the transmitter. The acoustic warning on the
transmitter is then switched off.
– The acoustic warning is switched off automatically after 2 minutes.
– With the factory basic settings the acoustic warning on the transmitter is
switched off.
Operation
59
Alarm LED Acoustic
alarm
Relay 1 Relay 2 Relay 3 Relay 4 Relay 5
no
power
red no closed closed closed closed closed
None green no open open open open open
A1 red no closed open open open open
A2 red no closed closed open open open
A3 red no closed closed flashing open open
A4 red yes closed closed flashing closed open
Transmitter 4
68 ppm NH3 I A1
04623572
VarioGard
ESC
VarioGard
ESC
1
1
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