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

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