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kipman
medical school grad
Joined: 13 Nov 2007
Posts: 58
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 Posted: Mon Aug 04, 2014 6:28 pm Post subject: Fuser high temp error |
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| I keep getting a fuser high temp error on a newer 7970, it has happen 3 times now. I reset it in service mode and it goes away and it works fine for a while. If I monitor the temp in info mode it goes from 158-169C so I know it is working. Any thoughts? |
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cjwilt
doctor
Joined: 24 Jan 2007
Posts: 1041
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| Posted: Tue Aug 05, 2014 9:13 am Post subject: |
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Have you checked the firmware to see if there is a newer one available?
Also double check the heat lamps, this model is known for having faulty lamps. |
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bigal
doctor
Joined: 17 Apr 2007
Posts: 352
Location: TEXAS
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| Posted: Thu Aug 13, 2020 9:38 am Post subject: E0901 Errors |
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Keep getting this error randomly. If I mask ovrtemp it is stable at 155-158C
It will work fine. But sometimes will throw error on startup as well.
Maybe new firmware?? Heat system seems to work fine. Even works for awhile without overtemp masked... for awhile..very random! |
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doodad
medical school grad
Joined: 03 Mar 2008
Posts: 72
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| Posted: Fri Aug 14, 2020 9:02 am Post subject: |
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| I would replace the thermostats and have the latest firmware installed. The thermostats are sometimes flaky. They are what triggers the error. |
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bigal
doctor
Joined: 17 Apr 2007
Posts: 352
Location: TEXAS
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| Posted: Wed Aug 19, 2020 6:11 pm Post subject: Temp Error. Again! |
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Replaced both thermostats and Thermistor...
worked for a couple of days...threw Error E-0901 today
does anybody know the latest Firmware version
For a 7970k?? |
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jedi4342
medical school grad
Joined: 27 Aug 2014
Posts: 64
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| Posted: Thu Aug 20, 2020 9:28 am Post subject: |
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Looks like this is the latest Firmware
79 Series-(1372xxxx)-FWU-4_SysK v2.x |
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caltech
doctor
Joined: 24 Feb 2006
Posts: 262
Location: Northern California
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| Posted: Sat Aug 22, 2020 2:56 pm Post subject: |
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Hey Alan,
There are 2 different 7970K version machines, thus 2 different versions of firmware. There's 7970K and the 79 Series. You identify them by serial number:
7970K serial #1371xxxx Latest Firmware Version 7970FX08.00
79 Series serial #1372xxxx Latest Firmware Version 7970FX04.00A |
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bigal
doctor
Joined: 17 Apr 2007
Posts: 352
Location: TEXAS
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| Posted: Sat Aug 22, 2020 3:28 pm Post subject: 7970K |
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Hi Thanks!
This is a 7970k Ran update to 2.2.118 it had 1.6a, Hope it solves it.
I also ran firmware update that KIP sent on flash drive.
Might possibly be thermistor not making good contact with fuser roller??
So far since update (2 days) its been ok.
We will see.... |
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bigal
doctor
Joined: 17 Apr 2007
Posts: 352
Location: TEXAS
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| Posted: Thu Oct 15, 2020 2:43 pm Post subject: E-0901 |
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Still getting this error randomly. I have replaced the thermistor and thermostats and the AC control PCB. Updated the firmware to version shipped with 2.218 System K upgrade and it will run fine for a few days or hours then randomly give E -0901
You can mask the error in service and it will reset and run fine for awhile......any ideas?. |
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caltech
doctor
Joined: 24 Feb 2006
Posts: 262
Location: Northern California
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| Posted: Fri Oct 16, 2020 1:01 am Post subject: |
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| Hey Alan, You may have a faulty SSR. One of them may stay on when it should turn off and cause an overheat. Easy enough to replace. |
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bigal
doctor
Joined: 17 Apr 2007
Posts: 352
Location: TEXAS
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| Posted: Tue Oct 20, 2020 8:11 pm Post subject: E-0901 |
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Changed both SSR relays, worked for about 1 hour. Funny thing In service mode under information the fuser1 temp will Sometimes jump from set value 150c to 255 randomly back and forth like the thermistor circuit is Open??
Traced wiring back from fuser unit plug for thermistor/thermostats and noticed factory wire tyes were tight , cut a couple and loosened stress at back of the fuser plug under the top cooling fan, Seems to work for now....Hopefully for good. The only thing left to replace is the DC control board $$$$! |
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