Exhausto EXact2 VEX240 series, Basic Instructions

Page: 80 / 108

Airflow/pressure
Unit
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the location of dampers, sen-
sors, air directions, etc.)
xx yy z
20 01 1 Airflow/pressure in ex-
tract air duct airflow too
high The unit provides airflow that is 25% above the setpoint.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 02 2 Airflow/pressure in ex-
tract air duct has been
too high for last 30 mi-
nutes. The unit has provided an airflow/pressure that is 25% above the
setpoint for more than 30 minutes.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 03 1 Airflow/pressure in ex-
tract air duct too low The unit is providing an airflow/pressure that is 25% below the set-
point.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 04 2 Airflow/pressure in ex-
tract air duct has been
too low for last 30 mi-
nutes The unit has provided airflow/pressure that is 25 % below the set-
point for more than 30 minutes.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 05 1 Airflow/pressure in
supply air duct too high The unit provides airflow that is 25% above the setpoint.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 06 2 Airflow/pressure in
supply air duct has
been too high for last
30 minutes The unit has provided an airflow/pressure that is 25% above the
setpoint for more than 30 minutes.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 07 1 Airflow/pressure in
supply air duct too low The unit is providing an airflow/pressure that is 25% below the set-
point.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 08 2 Airflow/pressure in
supply air duct has
been too low for last 30
minutes The unit has provided airflow/pressure that is 25 % below the set-
point for more than 30 minutes.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 09 1 Minimum airflow for
cooling/heating units in
the supply air duct was
not achieved The required supply airflow for operating cooling/heating units was
not achieved.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 10 3 Minimum airflow for
cooling/heating units in
the supply air duct has
not been achieved for
last 30 minutes The required supply airflow for operating cooling/heating units was
not achieved within 30 minutes.
● Check the fan speed settings in indoor air quality level and the
fan limits.
20 11 1 Cooling cannot be re-
leased because sup-
ply/extract airflow ratio
was not achieved The required air balance between supply air and extract air is high-
er than the permitted limit of 1. 15:1
● Check the fan speed settings in indoor air quality level and the
fan limits.
3005167-2022-02-02
Alarms
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