Solved problem heated bed max temp error (shows 222°c)

I have max temp error with the heated bed

the thermistor readings in simplify3d and mattercontrol show : bed temp 222 °celcius

so looked into this , swapped the thermal sensor under the heating bed , but the problem

dit not go away , the error message keeps showing up


this error was started when i started a print and after 3 hour of printing the printer stopped printing

when i looked at the print , the printer was locked , i could not move the axis , nothing works

so i have turned it off and on again , rebooted pc , reconnect cable , tried to re-flash the arduino with v3 firmware ( have robo 3d r1 ) nothing worked


so i had swapped the thermal sensor , tested the sensor , it worked when i connected the same type sensor to the extruder , but the heated bed keeps showing 222 °c


it looks like it was the board , so i swapped the board ( what is on top of the ramps board ) with a new one ( i did this before last year when there was also some problems )


any suggestions ?


For the moment I'm completely out of ideas...


if you look the history i already did on this machine : swap board , replace thermal sensors , replace hot-end with better model e3d , got a busted cable of the heated bed ( from constantly pushing up and down it was cracked the cable , edited this also so that the broken part was fixed , all this history i did already gives me the idea that this is a trouble child machine , there keeps popping up new problems


for the moment we cannot print anything anymore , the heated bed keeps on 222°c


thanks for any advice

 

i will check today this , but we have already swapped the connector on the board with a new cable where we directly connected a new thermal sensor on , so the original wire was disconnected and we have connected a fresh new cable with a new thermal sensor on the back connected to , the results keep the same , thermal readings on software say : 222 degrees , max temp warning heated bed , we have also checked with the extruder thermal sensor , this says : room tempature 20 °c , but when we swap this plug on to the connector for the heated bed it keeps saying : 222 °c , and the extruder sensor says 0°c , so the results keep the same after swapping the connector of the good extruder sensor onto the heated bed temp sensor connector , and using new cable and new sensor does nothing also , even if you disconnect all the temp reading keeps the same : 222°c heated bed... where if we disconnect the extruder sensor the reading go to 0°c so normally when we disconnect the sensor on the heated bed connector this would need to go also to 0°c ?

or are we missing something ?
the arduino i have replaced with a new one also yesterday thinking it would be the problem with the board but nothing changes , also re flashing the firmware did nothing with that heated bed max temp warning...

is it normal that we cannot use axis anymore , when the machine is connected on the firmware and the readings come in that communications are all good , we still cannot move the directions z+ or z- does nothing anymore...

this was started like this when the machine was starting a big print , after 3 hours it just stopped , heated bed temp max out warning , and we could not move the head anymore , everything was locked , even after restart the machine does not move anymore , i dont know if this is because of the heated bed temp max out error , or maybe something else ?

 

Are you power cycling between swapping the connectors?

 

problem is resolved..

i have installed a new ramps 1.4 card , and the board that is on top of this we swapped but forgot the jumpers on this
after adding the jumpers on the correct place and installing a new ramps 1.4 card under this , the problem was fixed

the problem started with a broken brace of the arduino cooler , i have now added 2 printed fan-holder with 2 x 40mm fan
and connected this with the 12v power supply cable...

for the moment i'm printing the riser feet for under the robo 3d to improve the air-flow for the arduino.
the prints are great quality again , just a little bug , when printing with usb cable sometimes the printer stops for a few seconds
and then continue the print again , i think this is because of buffering issue or delay with the pc ?

so good cooling of the arduino is of life importance for survival of your arduino cards
i would recommend this better cooling fix to everyone... for longer life of the cards...