Description: Fuser IH output over-current error The output current is greater than 75A for 10 ms in succession.
Causes: Defective connector cable or poor contact in the connector. Defective fuser IH PWB. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26) Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 6760
Description: Fuser IH input over-current error The input current is greater than 20A for 100 ms in succession.
Causes: Defective connector cable or poor contact in the connector. Defective fuser IH PWB. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26) Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 6770
Description: Fuser IH low electric power error The preset power is less than 0.6 times of it for 120 ms in succession.
Causes: Defective connector cable or poor contact in the connector. Defective fuser IH PWB. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26) Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 6780
Description: Fuser IH input over-voltage error The input voltage is greater than 140V for 200 ms in succession.
Causes: Defective connector cable or poor contact in the connector. Defective fuser IH PWB. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26) Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 6900
Description: Fuser belt cooling fan error When the fuser front or rear fan motor is driven, alarm signal is detected for 5 s continuously.
Causes: Defective connector cable or poor contact in the connector. Defective fuser front or rear fan motor. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser front fan motor and front PWB (YC4) Front PWB (YC3) and engine PWB (YC7) Fuser rear fan motor and engine PWB (YC26) Defective fuser front or rear fan motor. Replace the fuser front or rear fan motor. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 6940
Description: IH fan motor error When the IH fan motor is driven, the alarm signal is detected for 5 s continuously.
Causes: Defective connector cable or poor contact in the connector. Defective IH fan motor. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. IH fan motor and feed PWB 1 (YC11) Feed PWB 1 (YC2) and engine PWB (YC5) Defective IH fan motor. Replace the IH fan motor. Defective engine PWB. Replace the engine PWB and check for correct operation.