Motion sensor PIR
Unit
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the positioning of dampers,
sensors, air directions, etc.)
xx yy
z
24 01
2
No modbus communi-
cation to PIR module
● Check the modbus cable between the connection board (EX-
act)/main board (EXact2) and PIR module.
● Check the modbus cable from the MCCW module to the other
units for faulty wiring.
● Check the DIP-switch settings in the PIR module, refer to MIO
module instructions or PIRB-AS instructions.
24 02
2
PIR input via BMS se-
lected and BMS has
not been configured.
● Configure BMS.
External cooling unit (MXCU) sensor
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
27 01
4
Supply air duct temper-
ature sensor discon-
nected
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
27 02
4
Supply air duct temper-
ature sensor short-
circuited
● Check the sensor's resistance complies with the actual tem-
perature. See temperature resistance table appendix 2.
● If the sensor resistance has significantly changed in value, it
should be replaced.
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Alarms
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Summary of Contents for EXact2 HMI2-350-TOUCH
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