Electrolux W465H Service Manual page 31

Fault code 20, I/O MCU INTERLOCK
This fault code is generated by the programming CPU board. The program
controller has read from the motor control or I/O board that the interlock is
not active. The reason for interlock failure can be a problem with the hatch
lock, damaged motor supply cables or the I/O board with interlock voltage
etc. The most probable fault source is the I/O board.
Fault code 21, I/O COMMUNICATION
This fault code is generated by the programming CPU board. The pro-
gram unit cannot communicate any longer with one or more I/O boards
in the machine that it has communicated with before. The cause can be a
problem with the machine's internal communication cables or that one or
more I/O boards have lost their address.
Action:
• (Requires password) Check the machine's internal communication
cables. Readdress all the I/O boards in the system using the service
program if the cables are not at fault.
Note.
If only one I/O-card in mascine, press the service button on the I/O-
card about 10 seconds or untill the LED goes out. Now I/O.card 1 will be
addressed as No. 1.
Fault code 22, OIL
This fault code is generated by the programming CPU board. The fault
code indicates low oil level in the oil reservoir for the oil lubrication. It can
be caused by a lack of oil, defective sensor, shorted cable, etc.
Action:
• Fill with oil first. If this does not help, check sensor and cables.
Troubleshooting
31