31
8.9. RESET FILTER ALARM
After each time the fi lter is replaced, the fi lter alarm
must be reset.
The symbol is lit, when the pre-set timer
for the fi lter replacement is exceeded. The
fi lter must be replaced, see page 35.
If the fi lter is not changed within 60 days,
then the ventilation system shuts down
automatically.
9. REDUCED LIST OF MODBUS REGISTERS
NEMBUS device has a RS485 communication port located
on position 32 in the main circuit board (see page 9).
The Slave Address by default is 1, if few units are connec-
ted in the Modbus network, the address of each one must
be different from the others. The communication parame-
ters must be the same for all units connected on the same
network. For more information regarding the communica-
tion parameters see the table of Holding Registers below:
DISCRETE INPUTS (Read only)
Modbus Adress Register Values Description Default Data type
10001 Active alarms
0 No alarm active Single Bit
1 At least one alarm active Single Bit
10002 Filter alarm
0 Alarm off Single Bit
1 Alarm on Single Bit
10007
Temperature sensor (extract
air) status
0 Correct Single Bit
1 Error Single Bit
10008
Temperature sensor
(exhaust air) status
0 Correct Single Bit
1 Error Single Bit
10009
Temperature sensor
(outdoor air) status
0 Correct Single Bit
1 Error Single Bit
10010
Temperature sensor (supply
air) status
0 Correct Single Bit
1 Error Single Bit
10011 Extract air fan status
0 Correct Single Bit
1 Error Single Bit
10012 Supply air fan status
0 Correct Single Bit
1 Error Single Bit
10016 Automatic by-pass
0 Not active Single Bit
1 Active Single Bit
10029 Boost contact status
0 Not active Single Bit
1 Active Single Bit
10030 Boost status
0 Boost active Single Bit
1 Boost not active Single Bit
OUTPUT COILS (Read/Write)
Modbus Adress Register Values Description Default Data type
1 Reset filter alarm
0 Do not reset 0 Single Bit
1 Do reset Single Bit
8 Manual by-pass
0 Not active 0 Single Bit
1 Active Single Bit
9 Allow automatic by-pass
0 Do not allow 1 Single Bit
1 Allow Single Bit
10 Summer mode status
0 Off 0 Single Bit
1 On Single Bit
17 Manual boost
0 Off 0 Single Bit
1 On Single Bit
18
Snooze mode
(unit stops for 1h)
0 Off 0 Single Bit
1 On Single Bit
26 Working mode
0 Manual 0 Single Bit
1 Automatic Single Bit
NOTE
At the factory, the timer for the fi lter alarm was set
at 12 months. Replacing of the fi lter is highly depen-
dent on the pollution of the outdoor air (pollen count,
construction site activity). The timer for the fi lter
alarm can be adjusted to 6 months, 9 months or 15
months, see page 25.
Press symbol for about 5 seconds. The fi lter
alarm is reset.
The light on the symbol goes out.
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