5.1.2 Standalone Operation (Button Control Mode)
▪ When applying power the system defaults into the “Button Control Mode” and goes into the
status “OFF ButtonControl” according to Figure 36. Levitation is disabled and the display
indicates “OF”.
▪ Levitation can be enable by pressing the “UP” button during 1 second (display shortly
indicates “ON”) or by activating (typically 24V) the “ENABLE” pin on the “User Interface”
connector (see Table 14). The system goes then into the status “ON Button Control” and is
running at the speed which is stored in the EEPROM.
▪ The speed can be changed by pressing accordingly the “UP” and “DOWN” buttons.
As long as the digits on the display are blinking the set speed is shown. As soon as blinking
stops the actual speed is shown and the set-speed is stored in the EEPROM of the controller
after about 2 seconds.
▪ The system can be disabled by pressing the “DOWN” button until 0 rpm is achieved. Pressing
further 1 second the “DOWN” button the system disables levitation and shows “OF” on the
display. The system can also be disabled by deactivating (0 V) the “ENABLE” pin on the
“USER INTERFACE” connector (see Table 14). Before disabling the system the speed is
automatically reduced to 0 rpm and the impeller is properly touched down without grinding the
wall.
▪ In case of an error the “RESET” button (see Table 12) can be used to restart the system or the
power can be switch off and on. For detailed error analysis the codes described in Table 16
are shown on the two digit display (blinking between “Er” and the according code number).
Figure 37: User panel of LPC-2000.1
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