Electrolux T5675 N2 Service Manual page 131

• UNDERVOLTAGE 1 (specifies how many times the voltage has dropped below the limit).
• LAST FAULT CODE N/8 (shows the 8 latest error codes) Undervoltages can be registered even during normal op-
eration. Consequently, a small number of registrations need not mean that there is an error in the MCU.
Recommended action:
1. Check that the supply voltage is stable and never drops below nominal voltage - 10%.
2. Check the fuses and cables.
3. Check the supply voltage in the network cabling and at the MCU in the machine.
23:8 HIGH DC VOLTAGE
This error code is generated by the MCU for drum motor.
The MCU constantly measures the voltage over the mains input. If the voltage exceeds a predefined limit, the MCU
will shut off the current to the motor, and the error code will be shown.
The error can be reset by pressing selector button when voltage is within range again.
Possible causes:
Fluctuating mains voltage.
Recommended action::
1. Check that the supply voltage is stable and never exceeds nominal voltage + 6%.
23:12 NO PARAMET. SET IN MCU
This error code is generated by the MCU for drum motor.
The MCU contains several different parameter sets for different motors. During power up the control system checks
that the correct parameter set digit is written into the MCU. If not, the control system will write down the parameter
set digit defined in fixed configuration.
If the MCU discovers that no parameter set value is written down into the MCU, the error code will be shown.
Possible causes:
This can be caused by wrong software in CPU or wrong MCU for the current machine.
Recommended actions:
1. Make sure correct machine software and correct MCU are used.
23:13 UNBALANCE
This error code is generated by the MCU for drum motor.
The MCU monitors the unbalance switch status. If the status is active already at program start, this error code is
shown.
23:15 MOTOR NOT FOLLOW
This error code is generated by the MCU. The MCU continuously estimates the motor speed. If the estimated speed
is less than 180 rpm 10 seconds after drive command, or higher than 180 rpm 60 seconds after stop command, the
error will be shown.
Possible causes:
• 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).
• Check that the drum can be rotated easily.
• Check motor windings for open circuit using a Motor tester.
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).
Recommended action:
1. Replace the defective part.
23:255 UNDEFINED ERROR
This error code is generated by the MCU. The MCU reports an error that is not defined.
Service Manual
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