Exhausto EXact2 VEX240 series, Основные инструкции

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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 12 3 Cooling cannot be re-
leased because sup-
ply/extract airflow ratio
has not been achieved
in last 30 minutes The required air balance between supply air and extract air is still
higher than the permitted limit of 1.15:1 after 30 minutes.
● Check the fan speed settings in indoor air quality level and the
fan limits.
CO
2
sensor
Device
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the positioning of dampers,
sensors, air directions, etc.)
xx yy z
21 01 2 No modbus communi-
cation to MIO CO
2
module
● Check the modbus cable between the connection board (EX-
act)/main board (EXact2) and MIO module.
● Check the modbus cable from the MIO module to the other
units for faulty wiring.
● Check the DIP-switch settings in the MIO module, refer to MIO
module instructions.
21 02 2 CO
2
level below 100
ppm. CO
2
sensor may
be defective.
● CO
2
sensor may be defective and should be replaced.
21 03 2 CO
2
input via BMS se-
lected and BMS has
not been configured.
● Configure BMS.
3005167-2022-02-02
Alarms
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