Electrolux T5675 Service Manual page 163

Troubleshooting
163
41:22 SET SIGNAL NO TACHO. WAIT 5 MINUTES
Only on Pocket washer.
Pocket washer uses two I/O boards type 10, one for the "Loading side" and one for the "Unloading
side".
This error relates to I/O board type 10 on "Unloading side".
See also corresponding error 41:2 for I/O type 10 on "Loading side".
The DLCU on I/O board type 10 counts the tacho pulses from the motor in order to guarantee that
the drum is standing still before the door is opened. To ensure that the signal from the tacho
generator is working correctly, DLCU compares the tacho signal with a digital bit value from the
CPU, which is due to the CPU having activated the motor (See DLCU status indication).
Error will reset automatically after 5 minutes and door will then unlock.
The error message is filtered in such a way that:
• The digital bit value should have been active for more than 2 seconds.
• When the digital bit value goes low, tacho signal must be present.
• Test is only performed when door is about to unlock.
Possible causes:
• Open or shorted circuit to the tacho sensor.
• Damaged tacho sensor or magnet.
• Secondary fault due to a error in the motor system.
Recommended actions:
1. Check that motor is actually running.
2. Check there is voltage from tachometer output when motor is running.
3. Check that rotation is detected in DLCU status for the I/O type 10 board.
41:23 ACTUATOR CIRCUIT
Only on Pocket washer.
Pocket washer uses two I/O boards type 10, one for the "Loading side" and one for the "Unloading
side".
This error relates to I/O board type 10 on "Unloading side".
See also corresponding error 41:3 for I/O type 10 on "Loading side".
The DLCU on I/O board type 10 continuously controls the circuit to the door lock solenoid. DLCU
can detect an open circuit (>50 kΩ) but not a short circuit. If case of an open circuit, CPU will show
the error. The error will disappear if the error is removed.
Possible causes:
• Open circuit to the door lock solenoid.
• Open circuit in the door lock solenoid.
• Error or open circuit in the I/O board 10 circuits.
Recommended actions:
1. Check resistance in door lock solenoid circuit. Correct reading is approx. 6 Ω.
2. Check if error "AC" still remains in DLCU status.