3005167-2022-02-02 Alarms Unit Fault code Category Frequency converter 1 Alarm description Troubleshooting (See appendix 1: "Simplified diagrams" for the location of dampers, sen- xx yy z sors, air directions, etc.) 01 01 4 One or more phases between frequency converter and motor is/are short-circuited to earth ● Check the cable between frequency converter 1 and motor 01 02 4 Max. motor current from frequency con- verter exceeds limit by 300% ● Check for low voltage to frequency converter 1 01 03 4 Frequency converter DC circuit max. voltage exceeds limit ● Check for overvoltage to frequency converter 1 01 04 2 Frequency converter DC circuit voltage too low when motor(s) start(s) ● Check for low voltage to frequency converter 1 01 05 4 Frequency converter DC circuit voltage too low when VEX unit stops ● Check for low voltage to frequency converter 1 01 06 4 Frequency converter power supply has lost a phase ● Check wiring from the power supply connection to the isolation switch in the VEX unit ● Check cable connections from the isolation switch to frequen- cy converter 1 01 07 4 Frequency converter power supply to mo- tor(s) has lost a phase ● Check the cable between frequency converter 1 and motor ● Check for a short circuit in the motor windings 01 08 4 Frequency converter overheated (based on internal calculations) ● Check if the temperature at frequency converter 1 exceeded the permitted 35°C when the alarm was tripped. If the temper- ature has been too high, the unit will restart when the air tem- perature falls below 35°C. 01 10 4 Frequency converter cooling coil overheated ● Check if the temperature at frequency converter 1 exceeded the permitted 35°C when the alarm was tripped. If the temper- ature has been too high, the unit will restart when the air tem- perature falls below 35°C. 01 11 4 Frequency converter motor(s) drawing too much current Fault on frequency converter 1 01 12 4 Frequency converter motor 1 overheated ● Check the motor impeller can turn freely ● Check that the fan impeller is not blocked 01 13 4 Frequency converter motor 2 overheated ● Check the motor impeller can turn freely ● Check that the fan impeller is not blocked 01 14 4 No modbus communi- cation to frequency converter ● Check the cable between the connection board and frequency converter 1 64/108
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