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

Recommended actions:
• Reconnect HEATER CONT board and
MAIN board.
Or replace the cable connecting HEATER
CONT board and MAIN board.
• If the green LED is still off after turning on
the power, replace HEATER CONT
board.
• If the red LED is blinking and there is no
problem on the connection between
HEATER CONT board and MAIN board,
reinstall the firmware.