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Solution
Check that:
1.
The main control board can be powered on, and RUN LED of the corresponding
slots blinks, indicating the main control board is working normally. For description of
the LED statuses, see the LED description in the installation guide supplied with the
AC.
2.
The memory chip is installed properly to the main control board, and the memory
chip or socket is polluted. In the latter case, clean them with specific cleaning
material, and then re-insert the memory chip.
3.
The CF card is properly connected.
4.
If the problem still exists, contact the service engineer.
