User Manual

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8 | Maintenance
8.3 PSU bootloader version
The bootloader provides the minimum diagnostic functionality and rmware up-
date features (depending on its version), and typically cannot be replaced by the user.
WARNING: This menu is used for updating the firmware via
USB. Please consult technical support before attempting to
update the firmware.
!
NOTE: This menu is also used to reset the PSU to factory settings. Factory
reset is mandatory after a firmware update.
1. Make sure the PSU is switched off.
2. Hold down the OK key on the keypad.
3. Switch the PSU on.
4. When the screen looks similar to the one shown
on the picture (e.g. “v1.07.3”), release the OK key.
5. Examine the version
6. Switch the PSU off, or, alternatively, press OK to
perform a factory reset.