Heater 0 appears to be over-powered.

[joeko]

hallo,
the rebuild of my printer is finished and i am working on the firmware. i did an pid tuning for the bed without error or warning and saved with M500
i have an duet3 6hc ith toolboard. at every start i get the warning

"Warning: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 291C"

befor i didnt get this warning. the bed is heating with a 220v kenovo and an ssr (crydom)
here is the heater setting in the config

M308 S0 P"temp0" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 Q10 ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C

[jens55]

@joeko, that is nothing to worry about ... it is actually something to be expected in a well working system.
Consider it a warning of what could potentially happen and a reminder that it is a good idea to have a thermal fuse on the bed just in case things go pear shaped.

[joeko]

ok, but in past this warning doesnt appear after a pid tuning and also now only for the bed and not for the hotend after a pidtuning for both

[dc42]

@joek the warning is coming from the M307 command in config.g. That M307 command should be removed because you have the correct one in config-override.g, which was saved there when you ran M500. Or you can copy the one from config-override.g to config.g.

[joeko]

@dc42 said in Heater 0 appears to be over-powered.:

@joek the warning is coming from the M307 command in config.g. That M307 command should be removed because you have the correct one in config-override.g, which was saved there when you ran M500. Or you can copy the one from config-override.g to config.g.

i had to copy it from the config-override to config. remove or a ; at the beginning of the line in the config was not enough