HELP ME - Err: MAXTEMP

[adim87]

Hello everyone, I'm new to the forum and I do not know if this is the section appropriate to the problem I'm going to expose you. I'll try to be clear.

I bought and assembled a Prusa I3 Pro B GeeeTech.

When I first start the printer the following error message being displayed: 358/0 ° - 25/0 - Err: MAXTEMP (see attached photo)

IMG_7284.JPG (62.27 KiB) Viewed 4401 times

I checked both thermistors with the tester and are both working with values ​​around 98KOhm, therefore they are not short.

If I unplug both thermistors is reported to me on the display: 358/0 ° - 0/0 ° - Err: MAXTEMP (see attached photo)

IMG_7284.JPG (62.27 KiB) Viewed 4401 times

The strange fact, once the problematic thermistor disconnected (hotend), is that the value 358 begins to drop very slowly. Reconnecting the thermistor its value returns to 358 instantly.

By checking the pins on the board (GT2560) I realize that those of heated are at - 45.2KOhm while dell'estruder are at + 101KOhm.

I try to check also the Marlin firmware and I show you the code for the sensors:

Code: Select all

#define TEMP_SENSOR_0 1
#define TEMP_SENSOR_1 0
#define TEMP_SENSOR_2 0
#define TEMP_SENSOR_BED 1

Do not really know what to do, I also loaded the new firmware but nothing to do. I also tried to make the tests showed here viewtopic.php?f=13&t=17030 but nothing to do.

Can you please give me some help?

Thank you