VLT ® 2900 Series Fr The frequency converter shows the present output fre- quency in Hertz [Hz]. Display readout A warning or an alarm will appear in the display as a numerical code Err. xx . A warning will be shown on the display until the fault has been corrected, while an alarm will continue to flash until the [STOP/RESET] key is activated.The table shows the various warnings and alarms, and whether the fault locks the frequency converter. After a Trip locked the mains supply is cut off and the fault is corrected. The mains supply is re- connected and the frequency converter is reset. The frequency converter is now ready. A Trip can be reset manually in three ways:
Warnings/alarm messages Io The frequency converter shows the present output current in Amps [A]. Uo The frequency converter shows the present output voltage in Volt [V]. Ud The frequency converter shows the intermediate cir- cuit voltage in Volt [V]. 1. Via the operating key [STOP/RESET]. Po The frequency converter shows the calculated output in kilowatt [kW]. 2. Via a digital input. 3. Via serial communication. It is also possible to choose an automatic reset in pa- rameter 405 Reset function . When a cross appears in both warning and alarm, this can mean that a warning comes before an alarm.
It can also mean that it is pos- sible for the user to programme whether a warning or an alarm will appear for a given fault. For example, this is possible in parameter 128 Motor thermal protec- tion . After a trip the motor will coast, and alarm and warning will blink on the frequency converter, but if the fault disappears only the alarm will blink. After a reset the frequency converter will be ready to start operation again. notrun This message is shown if an attempt is made to change a parameter value while the motor is running. Stop the motor to change the parameter value. LCP This message is shown if an LCP 2 control unit is fitted and the [QUICK MENU] or [CHANGE DATA] key is activated.
If an LCP 2 control unit is fitted you can only change parameters with that. Ha The frequency converter shows the present Hand mode reference frequency in Herz (Hz). SC The frequency converter shows scaled output fre- quency (the present output frequency x parameter 008). All about VLT 2900 MG.29.A3.02 - VLT ® is a registered Danfoss trademark 71