The cpu fan is the one on the (sbc) single board controller. It isbehind the top rear cover and silver cover on the rear left held on by one screw. I would put the latest general release software on.
If the CPU is overheating, it will show in section "Description & Alerts". Also the mashine is one years old and the counters shows 25893 pages is not too mach. But I will check that. Thank you.
The WC 7556 goes offline at least two times every day and I must set online manually. It shows an error: 03-504-00 Machine is offline and will not accept new jobs submitted over the network.... It is very annoying. How I can set to "always online"? The firmware is the last one: 061.121.223.36000.