5.21.2 Alarm codes
Error codes are divided in different groups for easier recognition of the alarm
source. Those groups are:
Error code Error source
1000…1999 Hardware related errors
2000…2999 Application related errors
3000…3999 Communication errors
9000…9999 3rd party related errors
Code Alarm
Class
Name/Description Source Plant
lock
BACnet object / Comment Influence of alarm
Code range for - Hardware (AHU)
1001 A Supply air temperature,
sensor fault
System Stop TSu Shutdown AHU
1002 A/B Exhaust air temperature,
sensor fault
System Run TEh,
active only if sensor available
Shutdown AHU/ No heat
exchanger supervision possible
1003 B Extract air temperature,
sensor fault
System Run TEx,
active only if sensor available
Fallback to room temperature
control or supply air control
1004 A/B Outside air temperature,
sensor fault
System Conf. TOa Shutdown AHU / fallback to default
1005 A Frost protection temperature
for heating coil, sensor fault
System Stop TFrPrtHcl,
active only if HclHw selected
Shutdown AHU, Frost protection
mode
1006 B Relative humidity for extract
air, sensor fault
System Run HuRelEx,
active only if sensor available
Stop Humidity control if all sensors
fail
1009 A Fire damper, position
feedback fault
Proces
s
Stop FdpFb,
active only if Fdp selected.
Plausibility check of fire damper
position feedback
Shutdown AHU
1012 B Room temperature,
sensor fault
System Run TR with POS8/QMX3 Fallback to extract temperature
control or supply air control
1013 B Room air quality,
sensor fault
System Run AQualR with QMX3 or PmR Stop air quality control if all sensors
fail
1014 B Extract air quality,
sensor fault
System Run PmR or AQualR, Particulate
matters, Air quality
Stop control if all sensors fail
1015 B Cooling coil DX evaporator
fault
Proces
s
Run CclDxFlt (BI, active only if CclDx
selected
Switch off cooling device
1017 B Room air humidity,
sensor fault
System Run HuRelR,
if configured on QMX
Stop Humidity control if all sensors
fail
1018 A/B Supply air temp. after
preheating coil, sensor fault
System Run TSuAfPreHcl,
active only if sensor available
Shutdown AHU/ Shutdown electric
preheating coil, fallback value for
heat exchanger efficiency
1019 B Flow temperature preheating
coil, sensor fault
System Run TFlPreHcl,
active only if sensor available
Fallback to default value
1020 B Air filter, dirty Proces
s
Run Operating hours of air filter
exceeds limit or delta P,
active only if FilA selected
No reaction
1021 B Supply air temperature after
heat exchanger, sensor fault
System Run TsuAfHExg,
active only if sensor available
Fallback value for Hexg efficiency
calculation
1031 A/B/n Heat Exchanger fault Proces
s
Run RotHExgFlt or HExgCdnMon (BI) Shutdown AHU / Bypass or
shutdown HExg / no reaction
1032 B Supply air pressure,
sensor fault
System Run PSu,
active only if VntCtl12 selected
Fallback to extract air control, linear
fan speed if all sensors fail
Application functionalities
Alarm functions
5
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