Internal Com. I/O Type 10 - Electrolux W565H Service Manual

Troubleshooting
111

INTERNAL COM. I/O TYPE 10

41:1 CHARGE CIRCUIT
The DLCU on I/O board type 10 contains an arming circuit that is charged when the door lock coil
is to be activated. For safety reasons, this arming circuit must be discharged when the door lock
coil is not to be activated. If the arming circuit for operating the door lock is charged when it is not
supposed to be, an error message will be sent to the CPU.
CPU reads the error message when the door is locked and unlocked and generates an error. The
error is ignored between these two occasions.
Possible causes:
• The error can bee caused by overloads and/or defective components in the DLCU on I/O
board type 10.
For pocket machine, this error relates to I/O board type 10 on "Loading side".
See also corresponding error 41:21 for I/O type 10 on "Unloading side".
41:2 SET SIGNAL NO TACHO. WAIT 5 MINUTES
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.
For pocket machine, this error relates to I/O board type 10 on "Loading side".
See also corresponding error 41:22 for I/O type 10 on "Unloading side".