Checks / troubleshooting:
• Check connection between control board and
MAIN board.
• Check if the green LED on control board is lit.
• Check if the red LED on control board is
blinking.

Recommended actions:
• Reconnect control board and MAIN board.
Otherwise, replace the cable connecting
control board and MAIN board.
• If the green LED on control board is off after
the power is turned on, replace the control
board.
• If the red LED is blinking and there is no
problem at connection between control board
and MAIN board, try to reinstall firmware.
• If the red LED is off, perform the following
procedures.
1. Turn off the power, then switch the DIP
switches as follows:
1: ON
2: ON
3: ON
4: OFF
2. Start the board manager mode.
3. Reinstall firmware.
4. Turn off the power, then switch the DIP
switches as follows:
1: ON
2: OFF
3: ON
4: OFF
5. Turn on the power, then check if the red
LED is blinking.