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

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