3006367-2022-04-05 Alarms Unit Fault code Category Pressure transmitter 1 Alarm description xx yy z 04 01 4 No modbus communi- cation to pressure transmitter 04 02 4 Calibration fault 04 03 1 Calibrate pressure transmitter 04 04 1 Pressure transmitter using old calibration values 04 05 4 Pressure transmitter not calibrated Troubleshooting (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) ● Check the modbus cable between the connection board (EX- act)/main board (EXact2) and MPT1. ● Check modbus cable for faults from MPT1 to the other units ● Re-calibrate ● If the problem continues, MPT1 must be replaced Calibrate MPT1 When the unit starts up this information is displayed. It does not necessarily mean that the pressure transmitter has to be calibra- ted. ● Check if the MPT is out of calibration in menu 8.4 and recali- brate if required ● Set the VEX/CX to "OFF" in the user menu and open the doors. Next calibrate the MPT in menu 8.4. Pressure transmitter 2 Alarm description xx yy z 05 01 4 No modbus communi- cation to pressure transmitter 05 02 4 Calibration fault 05 03 1 Calibrate pressure transmitter 05 04 1 Pressure transmitter using old calibration values 05 05 4 Pressure transmitter not calibrated Troubleshooting (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) ● Check the modbus cable between the connection board (EX- act)/main board (EXact2) and MPT2. ● Check modbus cable for faults from MPT2 to the other units ● Re-calibrate ● If the problem continues, MPT2 must be replaced Calibrate MPT2 When the unit starts up this information is displayed. It does not necessarily mean that the pressure transmitter has to be calibra- ted. ● Check if the MPT is out of calibration in menu 8.4 and recali- brate if required ● Set the VEX/CX to "OFF" in the user menu and open the doors. Next calibrate the MPT in menu 8.4. Unit Fault code Category 71/116
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