Error: Heating failed, system stopped! Heater_ID: Bed

Error: Heating failed, system stopped! Heater_ID: Bed

This error is show when the Bed does not reaches the required temperature as set by the machine. To confirm that the error is related to bed you can check the last word of the error which says "Bed". 

Schematics of Heater wiring.
This error comes when the bed does not get heated to the required temperature according to the temperature set by printer. The printer has inbuilt program which monitors both the temperature and power supply to heating elements. So when certain temperature is set, the printer starts supplying power to the bed heater and takes the temperature reading using thermistor. If the temperature does not increases after certain period of power supply to bed heater the printer detects a issue and stops.

Trouble shooting:
This error can be caused by 3 issues.
1. Faulty Thermistor.
2. Faulty SSR.
3. Faulty Bed Heater
4. Wiring Loose connection.

1. Faulty Thermistor:
Min Temp error for bed-
1. Take a multimeter and check the resistance of the Thermistor. If the thermistor is giving incorrect readings then thermistor is damaged and needs replacement.
Remove the thermistor wire
Check the resistance on the Resistor. Resistance should be around 90 Ohms


If the thermistor is giving correct readings then the wiring is faulty. You need to check the wiring of the Thermistor till MKS. There will be some connectivity issue which will hinder the transfer of thermistor data to MKS. Fixing the connection will solve the issue.

2.Faulty SSR/SSR wiring.
1. Check power supply to SSR:
SSR is the component which supplies power to the heater bed for heating. If the wiring from power switch to SSR is damaged the the SSR and Heater bed will not get power supply.
How to check?
Take a multimeter and check current at SSR input (for neutral probe use the neutral wire in Power switch of SMPS). If the input is not there then check for loose connections near power switch. If the input is correct then check the the output terminal of SSR. 
Use neutral pin in SMPS and line input in SSR
Close up
Incase the supply is correct the Voltage should be around 220V
Note: The line input and line output can be interchanged as there is no polarity. SSR just creates continuity which starts current supply to Bed

Checking working of SSR:
If the Bed heating is turned on then the SSR output should be 240 Volts. If the bed heating is not on then the SSR should not be supplying any current
 In case of faulty SSR the SSR will supply or not supply current irrespective of the bed heating state.
If the SSR is not switching between on and off WRT to bed heating status the SSR is spoilt. 

Check the other pin, use the SMPS neutral for probe.

For confirmation check the MKS output terminals.
When the bed is in heating state the MKS bed heater terminal should output 24 volts. When the Bed is not heating the output should be Zero.

Note: There are chances of MKS not giving commands to SSR for switching. So before confirming that SSR is damaged do a confirmation test by checking MKS output.
Start bed heating and check the voltage. It should be 24v or 12 V

If the MKS  outputting 24V or 0V irrespective off ON OFF status then MKS is damaged and SSR is not functioning since MKS is not giving it input. MKS needs to be Replaced if MKS is faulty. If MKS is fine and SSR is not functioning properly then SSR needs to be replace.

If both SSR and MKS are working fine then Bed heater will be faulty. 
To check if Bed heater is faulty you should check the resistance of the bed heater. Take a multimeter and connect to the terminals of Bed heater. The resistance should be around 100 ohms. If the bed heater is faulty the resistance will not be shown correctly. 
Remove the wire connected to bed heater.
Remove the neutral wire from SMPS to get correct resitance.

Check the resistance of heater Bed using line and neutral points. The resistance should be around 140 ohms

To confirm that it is bed heater damage and not wiring issue, cut and remove the solder of bed heater wire and check. If the resistance is shown correctly when you connect directly then the wiring was faulty. So replace the wires and solder new wires. Or else bed heater needs to be replaced.

    • Related Articles

    • Thermal Runway, System Stopped Error

      Fracktal printers come with inbuilt feature to avoid accidents by over heating of the nozzle or heater cartridge. Due to some issue with printer if the heater cartridge heats beyond certain temperature it can lead to melting of hot end and also fire ...
    • Troubleshooting Limit switch issues.

      Fracktal 3d Printers come with 3 Limit switches. X axis  Y axis Z axis Whenever these switches fail the printer faces certain issues like not being able to move in certain direction or going and crashing at the edges. Below we have listed out the ...
    • Replacing Nozzle PTFE

      Nozzle PTFE is a important component of the Nozzle. Even though its a tiny piece of plastic tube it plays a major role in your print quality.  The nozzle PTFE has following functions: 1.Avoids leakage of molten filament material. 2. The PTFE tubes ...
    • Changing Material/ filament.

      Fracktal Printers support a wide variety of materials. This article will guide you through the procedure to change filament. To Change the filament we need to unload the existing filament first. Note: While changing filament, always select the ...
    • Popular Articles

    • Buying a 3D printer.

      3D printing technology is broadly classified into FDM, SLA and SLS printing. We at Fracktal works Manufacture and sell machines related to FDM and SLA. If you need parts printed using SLS you can use our Fractory service. We have mentioned few of the ...
    • Removing carriage board - Julia Extended.

      Carriage board is a small board mounted on the carriage. To remove the carriage board follow the steps below. Note: Remove filament before removing carriage cover. 1. Remove carriage cover. The carriage cover is fastened by 2 screws. Please be ...
    • Fracktory software, User manual and Quick start Video

      Here is the download link for the latest Fracktory: Kindly register with us via the software to avail special offers and updates from Fracktal. The user manual also describes the best practices to use the ...
    • Hotend Assembly

      The hotend assembly * Nozzle (0.4mm) * Heater block (Steel block) * Heating cartridge * Thermistor  Nozzle swap procedure: * To replace the nozzle, first wait for the nozzle to cool down. Then gently pull down the (green) connector. * Use an M3 allen ...
    • Build plate related issues

        The aluminum build plate and PET sheets are consumables and not covered under warranty.   Over time, the build plate will might wear out and and lead to print inconsistencies due to irregular surface. The cost of replacing the build plate is INR ...
    • Recent Articles

    • Removing carriage board - Julia Extended.

      Carriage board is a small board mounted on the carriage. To remove the carriage board follow the steps below. Note: Remove filament before removing carriage cover. 1. Remove carriage cover. The carriage cover is fastened by 2 screws. Please be ...
    • Sending Gcode to Fracktal care for troubleshooting.

      Analysing the Gcode is one among the primary steps done while troubleshooting issues. The gcode which may be fine in your system may get corrupted while uploading to your printer. To make sure this corruption has not happened we recommend analysing ...
    • Material (filament) storage SOP

      3D printing filaments are hygroscopic in nature. PLA Nylon and PVA are extremly hygroscopic and storing them in air tight containers with dessicants is a must. Other filaments also need to be stored in air tight container but can be exposed to ...
    • SMPS not turning ON

      SMPS may not turn because of these reasons. 1. SMPS is not getting power supply. 2. SMPS is spoilt 3. SMPS is detecting a short in machine circuit and is auto Shutting. Troubleshooting: Note: Checking SMPS input when machine is on is risky task. You ...
    • Changing SMPS- Extended.

      Fractal Printers are designed with serviceability in mind. Changing SMPS in Julia Extended can be done with the help of a + Screw driver and 2.5mm Allen key (Allen Key is provided with the Accessory box).  Steps to replace SMPS: 1. Switch off the ...