C6501 C4721 then C4101

[tulintron]

Congratulations on your success

[zmeutz]

RESOLVED
Bad M43 fan motor that appears to spin normally was at fault.
My Service Manager decided to replace it & the C4101 code did not happen.
To test I opened the front door and plugged the suspect fan back in and code happened right after I closed the door.

After unswapping PRCB, IPB & Kwrite unit the original C4721 code came back.
Swapped the loaner K write unit back in and unit is fully useable.

Also - there are 5 fans & a TEMS/HUM unit mounted on the frame & no way to keep it off to the side so I completely disconnected it & set it aside as it did not appear to cause any fan codes which I expected to show up. This obviously is faulty logic. Don't do it.

My SM thinks it is time to replace all 5 fans -the unit has 4 & 1/2 yrs of use now & will be kept in use for the foreseeable future.

Thanks for the input and hope this helps someone else - watch out for those fans.

Is the same also for 4102? (M43 fan motor)
I don't find this error no where...

thanks!
stefan

[Phil B.]

Is the same also for 4102? (M43 fan motor)
I don't find this error no where...
thanks!
stefan

well then your MACHINE may not have that fan nor that code in firmware ...


RTFM

oh and STOP posting on a DEAD thread that has been solved years ago...

Different machine START YOUR OWN LIVE THREAD!