Mk2s -> Mk2.5s upgrade. Need help with MAX TEMPERATURE error
 
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magnus.e
(@magnus-e)
Active Member
Mk2s -> Mk2.5s upgrade. Need help with MAX TEMPERATURE error

Hi.

I got my upgrade kit yesterday, and have assembled the upgrade.

At first time powering on I got the MAX TEMPERATURE error with a loud beep.

When I disconnect the hotend termistor, I get a MIN TEMPERATURE error with no beeb.

In this state I flashed the firmware, and ran the wizzard.

All other fans, steppers and bed work, but the hotend test fails (with termistor disconnected).

I got my multimeter and checked if there is a short with the beeper tester, and the termistor is not fully shorted, as the multimeter does not beep.

I then checked the resistance of the termistor, and I got a reading of 55Kohms.

After googeling a bit, I found something that the e3d v6 should have a resistance of 100komhs, but the Prusha supplied termistor might be different?

 

Anyone know where to go from here? I really need this printer to work, and I'm sooo looking forward to print with the upgraded mk2.5s

Thanks in advance Magnus_e

Posted : 07/01/2020 2:03 pm
Dave Avery
(@dave-avery)
Honorable Member
RE: Mk2s -> Mk2.5s upgrade. Need help with MAX TEMPERATURE error

100K for Prusa thermisters at room temp

Posted : 07/01/2020 8:36 pm
magnus.e
(@magnus-e)
Active Member
Topic starter answered:
RE: Mk2s -> Mk2.5s upgrade. Need help with MAX TEMPERATURE error

@david-a66

Ok. 

Do you have any idea whats wtrong with it, wen its only 55K?

I guess current follow the path of less resistance. 

Is my best shot just replacing it? 

Posted : 07/01/2020 8:52 pm
Nikolai
(@nikolai)
Noble Member
RE: Mk2s -> Mk2.5s upgrade. Need help with MAX TEMPERATURE error

@magnus-e

Contact Prusa Support online chat and let you send a replacement.

Often linked posts:
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My prints on Instagram

Posted : 07/01/2020 10:17 pm
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