First power on. Err: MAXTEMP

[pylgrym]

I have a new G2s pro. I've managed to get it assembled despite the instructions missing one or two steps and one captive nut missing on an extruder motor base. I have got the latest firmware source, compiled & uploaded in Arduino.

My actual problem is that as soon as I power it up, either just over USB or with the PSU, I get "Err: MAXTEMP" on the display see attachment

When I try to connect with Repetier-Host, I get:
13:31:30.806 : Printer reset detected - initalizing
13:31:30.806 : start
13:31:30.806 : echo: External Reset
13:31:30.806 : Marlin 1.0.3 dev
13:31:30.806 : echo: Last Updated: Dec 21 2015 13:21:45 | Author: (Hogan, Delta)
13:31:30.806 : Compiled: Dec 21 2015
13:31:30.806 : echo: Free Memory: 3637 PlannerBufferBytes: 1232
13:31:30.806 : echo:Hardcoded Default Settings Loaded
13:31:30.806 : echo:Steps per unit:
13:31:30.806 : echo: M92 X80.00 Y80.00 Z80.00 E93.00
13:31:30.806 : echo:Maximum feedrates (mm/s):
13:31:30.806 : echo: M203 X400.00 Y400.00 Z400.00 E45.00
13:31:30.806 : echo:Maximum Acceleration (mm/s2):
13:31:30.806 : echo: M201 X5000 Y5000 Z5000 E5000
13:31:30.806 : echo:Accelerations: P=printing, R=retract and T=travel
13:31:30.806 : echo: M204 P1000.00 R2000.00 T2000.00
13:31:30.806 : echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
13:31:30.806 : echo: M205 S0.00 T0.00 B20000 X20.00 Z20.00 E5.00
13:31:30.806 : echo:Home offset (mm):
13:31:30.806 : echo: M206 X0.00 Y0.00 Z0.00
13:31:30.806 : echo:Endstop adjustment (mm):
13:31:30.806 : echo: M666 X0.00 Y0.00 Z0.00
13:31:30.806 : echo:Delta settings: L=delta_diagonal_rod, R=delta_radius, S=delta_segments_per_second
13:31:30.806 : echo: M665 L196.00 R92.00 S200.00
13:31:30.806 : echo:Material heatup parameters:
13:31:30.806 : echo: M145 M0 H190 B55 F255
13:31:30.806 : echo: M145 M1 H230 B70 F255
13:31:30.806 : echo:PID settings:
13:31:30.806 : echo: M301 P22.20 I1.08 D114.00 C1.00
13:31:30.806 : echo:Filament settings: Disabled
13:31:30.806 : echo:Z-Probe Offset (mm):
13:31:30.806 : echo: M851 Z-2.00
13:31:32.056 : Error:MAXTEMP triggered, system stopped! Heater_ID: 1
13:31:32.056 : Error:Printer halted. kill() called!

Resistance of all 3 thermistors is around 100-135kohms.

Anyone got any suggestions?

Mark

[Mark]

check this link here:
http://www.geeetech.com/forum/viewtopic ... 13&t=17030

[pylgrym]

Hi Mark,

I'd seen that link. It hadn't helped until I made the following change:

I commented out the over temp check at line 1556 of temperature.cpp (if (current_temperature_raw[1] GE1 maxttemp_raw[1]) max_temp_error(1);)

Now the printer starts up, albeit with the thermistor for heater 2 out of action. I now have movement and good temperature indication on the bed and extruder 1. I swapped the thermistors over (I'd managed to leave them swapped in my previous tests) and the problem remains with heater 2 so I think I have a bad ATD on the board on that channel. It's showing 358º (i.e. ATD value 0) when cold. I guess it may just be possible that there's a short on the connector or similar. Do you agree with my diagnosis?

Regards

Mark

[Mark]

seems correct. Is there any solder bridge on the back of the thermistor connector? or anywhere on the back of the board?