Electrolux T5190LE Service Manual page 91

Service Manual
91
21:15 MOTOR NOT FOLLOW
This error code is generated by the MCU. The MCU must always receive information on the rotation of the motor from
the tacho sensor in order to rotate. If the tacho sensor is not working, the motor can rotate for max. 10 seconds during
the starting process. After this period, this error code will be activated.
Possible causes:
• Break in the cables between the tacho sensor and the MCU.
• Break in connectors in tacho cables.
• Break in one of the phases to the motor (cables or connectors). This error can be suspected if the motor does not
rotate for 10 seconds (the motor will not start with only two phases).
• Error in tacho generator.
• Error in tacho circuits in the MCU.
Further information can be obtained by studying the contents of MCU ERROR LOG 1 and MCU ERROR LOG 2. Study the
following:
• MOTOR NOT FOLLOW (specifies how many times this error code has occurred).
• LAST ERROR CODE N/8 (shows the 8 latest error codes).
• TACHO ERR. LOW SPEED (can give a clue in case of intermittent errors).
• TACHO ERR. HIGH SPEED (can give a clue in case of intermittent errors).
Recommended actions:
1. Replace the defective part.
21:255 UNDEFINED ERROR
This error code is generated by the MCU. The MCU reports an error that is not defined.