Checks / troubleshooting:
1. Is Switch Lever pressing the sensor while
Front cover is closed?
2. Is Cover sensor wobbly?
3. Are the cables of Cover sensor securely
connected?
4. Are Cover sensors damaged?
5. Check the operation of Front cover sensor
in “Sen : Cover” in the self-diagnosis
function.
6. MAIN board may be damaged.

Recommended actions:
Fix Switch Lever so that it presses the sensor.
Tighten the screw on Cover sensor .
Securely connect the cable to connector.
Check if the interlock cable is securely connected
to MAIN board
Replace F cover R sensor and F cover L sensor