What happened?
The printer is showing the message "Heatbed tile no. #: Unexpected temperature peak detected".
Error name: MB peak temp
Error code: #17255
How to fix it?
A visual inspection
Check the heatbed tile for physical damage, for example, a scratch on any heatbed tile surface, or a cable in bad status on the bottom of a heatbed tile. Identify the heatbed tile number.
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Check that the indicated heatbed cable is correctly connected with the modular bed electronics, and with the heatbed tile, and reseat the connection.
Error on heatbed tiles 1 or 7
In case of an error specifically on heatbed tile 1 or heatbed tile 7, it is possible that one of the PSUs could be faulty. Before attempting the cable swaps in the below flowchart, attempt the following steps:
- Switch the printer off, make sure it is cold and disconnected from the mains.
- Looking at the rear side of the printer, apply the following steps to the left PSU for an error on heatbed tile 1, and to the right PSU for an error on heatbed tile 7.
- Using a 2.5mm Allen key, remove the bolt holding the switch-cover. Once removed, check if the PSU is switched on (symbol "I").
- Using a 2.5mm Allen key, remove the two bolts holding the PSU cover. Then, remove the PSU cover.
- Switch on the printer. Observe if the green light switches on, or remains off. A green PSU light that remains off upon powering on the printer indicates an issue with the PSU.
Left PSU Right PSU
Troubleshooting flowchart
Follow the procedure indicated in the below flowchart to help diagnose the faulty component. As a first step, swap the cable on the tile side connected with the erroring tile with any other cable on the tile side.
Each connector has a safety latch. It is necessary to press the latch before disconnecting. Otherwise, the connector may get damaged.
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| Cable connectors on the heatbed tiles side. | Cable connectors on the board side. |
4 comments
@DEV/SUPPORT:
Please communicate if and when this is fixed in the next firmware release. This is so annoying!
I have experienced this error three times in the same half hour trying to print ASA and ABS. The print did not finished even the first layer. However, this not happened to me on PLA and PETG.
To put in the context, the dimension of the object I was printing was leaving front line of tiles (7,8,9,10) and right side of tiles (11,14,15) without anything on them. To my knowledge, the unoccupied tiles adjacent to the ones that are occupied are heated at lower temperature. Also we should consider that the print is happening in the enclosure so ambient temperature is also high, 42 C.
The main question is, is it possible that the proximity with the high temperature tiles (ASA and ABS 100 C) to raise the temperature on the lower heated tiles so the peak temperature alarm is triggered?
Workaround that I tried successfully, I occupied all tiles with something to print so they are heated at the same temperature. It is enough to have a line of two layers on it a tile to keep it active, however this approch consumes a bit more power but you can finish the print.
Some questions arise from here:
Where can be adjusted the alarm thresholds?
Where can you see the individual tile temperature?
Best regards,
Daniel
There should be a better way to avoid this error. Either an option to tell the printer when using a custom enclosure or a way to configure the alarm threshold.
Best regards,
Markus
"Swap the heatbed tile connection indicated on the error with another heatbed tile connector"
A wire has two connectors on it. Following rhe above instructions would mean only changing one connector on the wire. Are we supposed to swap the entire wire or, as instructed, one end of the wire?