Code
Alarm
Class
Name/Description
Source
Plant
lock
BACnet object / Comment
Influence of alarm
1033
B
Extract air pressure,
sensor fault
System
Run
PEx,
active only if VntCtl12 selected
Fallback to supply air control, linear
fan speed if all sensors fail
1034
B
Differential pressure supply
air fan, sensor fault
System
Run
DiffPFanSu,
active only if sensor available
Fallback to linear fan speed, if in air
flow control
1035
B
Differential pressure exhaust
air fan, sensor fault
System
Run
DiffPFanEh,
active only if sensor available
Fallback to linear fan speed, if in air
flow control
1037
A/B/n
Supply air fan fault
Proces
s
conf.
FanSuSpdFb, FanSuFlt
Check of fan speed feedback or
fault signal
Shutdown AHU / No reaction / No
reaction
1038
Exhaust air fan fault
Proces
s
conf.
FanSuSpdFb, FanSuFlt
Check of fan speed feedback or
fault signal
Shutdown AHU / No reaction / No
reaction
Code range for - Application
2001
A
Emergency off
Proces
s
Stop
EmgOff (BI)
AHU off
2002
A
Smoke detector
Proces
s
Stop
Smext (BI)
Smoke extract mode
2004
A
Fire alarm
Proces
s
Stop
Supply (TSu) or extract (TEx) air
temperature exceeds max. limit
Shutdown AHU
2005
B
Supply air temperature,
exceeds operating limits
Proces
s
Run
Supply air temperature (TSu)
exceeds min/max limits
No reaction
2007
A
Heating coil, frost warning
Proces
s
Stop
Temperature (TFrPrtHcl) below
frost protection limit ,
active only if HclHw selected
Shutdown AHU, Frost protection
mode: Switch on pump, open valve
2010
A
Heating coil, over
temperature
Proces
s
Stop
HclOvrTDet (BI),
active only if HclEl selected
Shutdown AHU
2012
A
Preheating coil,
overtemperature
Proces
s
Stop
PreHclOvrTDet,
active only if PreHclEl selected
Shutdown AHU
2013
A
Outside air damper stops air
flow
Proces
s
Stop
Shutdown AHU
2017
A/B/n
Heat exchanger efficiency
supervision
Proces
s
Conf.
Plausibility check of air
temperatures
Shutdown AHU /
Bypass or shutdown / no reaction
Code range for - Communication
3005
B
I/O extension modul, Modbus
communication fault
System
Run
POS9,
active only if device configured
Same reaction as for each
connected input
3011
B
Duct pressure sensor,
Modbus communication error
System
Run
QBM,
active only if device configured
Fallback to linear Fan speed
3012
A/B
Supply air fan, Modbus
communication fault
System
Conf.
Active only if Modbus fan
configured
A: Shutdown AHU /
B: No reaction
Reaction of fan based on fan
device configuration
3013
A/B
Supply air fan, Modbus
communication fault
System
Conf.
Active only if Modbus fan
configured
A: Shutdown AHU /
B: No reaction
Reaction of fan based on fan
device configuration
3101
B
Room sensor, KNX PL-Link
communication error
System
Run
Common fault for all PL-Link
room devices:
POS8.4420/4440,
QMX3.P30/P40/P70,
active only if device configured
Application functionalities
Alarm functions
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