Code :

Code: L4-31
Description: Exhaust fan motor lock detection trouble
The error detection is started after 2 sec from starting rotation of the exhaust fan motor. 1) The continuous rotation state of 250ms is not detected for 1 sec after starting detection. 2) When the lock sensor (in the exhaust fan) detects the HIGH level (unstable) after detection the lock state (stable state).
Causes: Exhaust fan motor connector connection trouble Exhaust fan motor trouble MCU PWB trouble

Code: L6-10
Description: Polygon motor lock detection
The lock signal (specified rpm signal) does not return within a certain time (about 20 sec) from starting the polygon motor rotation.
Causes: Polygon motor unit abnormality Improper connection or disconnection of the polygon motor and the harness. MCU PWB abnormality

Code: U2-11
Description: Counter check sum error (EEPROM)
Check sum error of the counter area in the EEPROM
Causes: EEPROM abnormality

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