• Tags
  • Documentation
  • Order
  • Register
  • Login
Duet3D Logo Duet3D
  • Tags
  • Documentation
  • Order
  • Register
  • Login

Error: Temperature reading fault on heater 0

Scheduled Pinned Locked Moved
Duet Hardware and wiring
4
29
2.0k
Loading More Posts
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • ?
    A Former User @felixlvh
    last edited by 11 Apr 2020, 07:57

    @felixlvh said in Error: Temperature reading fault on heater 0:

    do i need to connect to power

    no, it should measure as close to 0 ohm when its ok, but it can be tricky to pierce oxide layer on old solder joints. You could repeat the measurement between Vin- and both pins on the thermistor input (one of them should be close to 0 ohm if the fuse ok)

    Looks to be the right part, but smaller on rev 1.2.

    1 Reply Last reply Reply Quote 0
    • undefined
      felixlvh
      last edited by felixlvh 4 Nov 2020, 08:02 11 Apr 2020, 08:01

      @bearer said in Error: Temperature reading fault on heater 0:

      no, it should measure as close to 0 ohm when its ok, but it can be tricky to pierce oxide layer on old solder joints. You could repeat the measurement between Vin- and both pins on the thermistor input (one of them should be close to 0 ohm if the fuse ok)

      Looks to be the right part, but smaller on rev 1.2.

      Thanks @bearer , in this case i don't think my vssa fuse is blown.

      1 Reply Last reply Reply Quote 0
      • undefined
        felixlvh
        last edited by 11 Apr 2020, 16:01

        @dc42 @bearer

        i have tried to disconnect all wires to isolate the issue. i am plugging in the extruder heaters e1, extruder thermistors, bed thermistor, heated bed still showing the same error. do you think is should get a new board?

        1 Reply Last reply Reply Quote 0
        • undefined
          Turbo
          last edited by 11 Apr 2020, 16:06

          This post is deleted!
          1 Reply Last reply Reply Quote 0
          • ?
            A Former User
            last edited by 11 Apr 2020, 16:06

            if you measure the resistance across the two pins of the thermistor plug, when its not connected to the board wht do you get?

            undefined 1 Reply Last reply 11 Apr 2020, 16:25 Reply Quote 0
            • undefined
              felixlvh @A Former User
              last edited by 11 Apr 2020, 16:25

              @bearer said in Error: Temperature reading fault on heater 0:

              not connected to the board wht do you get?

              @bearer , i got reading 80.3K

              ? 1 Reply Last reply 11 Apr 2020, 16:27 Reply Quote 0
              • ?
                A Former User @felixlvh
                last edited by 11 Apr 2020, 16:27

                @felixlvh said in Error: Temperature reading fault on heater 0:

                80.3K

                config says its a 100k thermistor so it should be about right

                maybe you should connect vssa directly to ground on a unused thermistor input now that you have nothing else connected; power from usb and see if that makes a difference

                undefined 1 Reply Last reply 11 Apr 2020, 16:31 Reply Quote 0
                • undefined
                  felixlvh @A Former User
                  last edited by 11 Apr 2020, 16:31

                  @bearer Thanks, i am still uncertain about the vssa fuse. if you see the image here, https://ibb.co/TYb2MNS i got reading 90.9K. i can now confirm board is v1.01.

                  1 Reply Last reply Reply Quote 0
                  • ?
                    A Former User
                    last edited by A Former User 4 Nov 2020, 16:38 11 Apr 2020, 16:35

                    you should get pretty much 0. (or at least single digit ohms)

                    if you have a wire handy, run it as shown here, connect the thermistor to e0 or bed and power from usb.

                    1758b6d1-6087-4aab-90aa-29698c5a34e8-image.png

                    (it'll bypass the fuse, which should be safe when only the thermistor and usb is connected)

                    edit: seems the 1.02 board do not have a resettable fuse
                    https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers#Section_VSSA_fuse

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      felixlvh
                      last edited by felixlvh 4 Nov 2020, 16:50 11 Apr 2020, 16:50

                      @bearer said in Error: Temperature reading fault on heater 0:

                      vssa directly to ground

                      @bearer If i did it correctly, It still shows the same error 2000'C

                      error.jpg

                      1 Reply Last reply Reply Quote 0
                      • ?
                        A Former User
                        last edited by 11 Apr 2020, 16:53

                        you've got the thermistor connected to e1 and configured for e0? move it to e0?

                        1 Reply Last reply Reply Quote 0
                        • undefined
                          felixlvh
                          last edited by 11 Apr 2020, 16:56

                          @bearer said in Error: Temperature reading fault on heater 0:

                          configured

                          @bearer OMG, E0 works!

                          e0.jpg

                          1 Reply Last reply Reply Quote 0
                          • ?
                            A Former User
                            last edited by A Former User 4 Nov 2020, 17:03 11 Apr 2020, 17:01

                            so you need a new fuse, ref the wiki link above.

                            edit; and you probably have to remap or repair fan2 as well.

                            1 Reply Last reply Reply Quote 0
                            • undefined
                              felixlvh
                              last edited by 11 Apr 2020, 17:04

                              @bearer am i right to say usign external fuse like this? can i still print by bypassing it temporarily? thanks a ton!

                              external fue.jpg

                              1 Reply Last reply Reply Quote 0
                              • ?
                                A Former User
                                last edited by A Former User 4 Nov 2020, 17:09 11 Apr 2020, 17:06

                                if the pins read vssa and gnd, then yes. (also very low value fuse, less is better, wiki says "between 125 and 250mA and a resistance of between 2 and 4 ohms.")

                                you can print with a bypass either a wire instead of the fuse, or like you tested - BUT there is likely a reason the fuse blew and the fan blew - your fan and thermistor have likely shorted on the hotend; and if it happens again with no fuse the CPU will likely be damaged.

                                1 Reply Last reply Reply Quote 1
                                24 out of 29
                                • First post
                                  24/29
                                  Last post
                                Unless otherwise noted, all forum content is licensed under CC-BY-SA