HYDROCAL 1001+ Installation and operation manual
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4.3.2.3.
Update of Firmware - via TFTP
A firmware update can also occur in the running firmware using the Ethernet interface and the so
called TFTP protocol. The transfer of the firmware image data occur in the background and is not
visualized. The subsequent write and verify operation is indicated by two or three red LEDs with the
green LEDs used as a progress bar. A successful update is followed by an automatic reboot of the
system. An error brings up 4 red LEDs - after some delay normal firmware operation resumes.
When the new firmware is already on the unit an optical and acoustical feedback is given. All green
LEDs are flashing and the beeper is activated in intervals of one second (duration ~4 seconds).
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