The GP20 "Thermistor is not connected"

There are three solutions to fix the "thermistor is not connected" error; check the data cables, the thermistor connector on the mainboard, or have it replaced.

The thermistor monitors the temperatures inside the GP20 for security reasons. There are three possible causes for this issue. Please follow the steps below, as it will check all possible solutions;

  • The data cables between the Controlbox (mainboard) and Granulator and shredder are not (properly) connected.
  • The thermistor is not (properly) connected to the mainboard.
  • The thermistor is damaged.

Note:

The error message is displayed on either of the machines; Shredder (top machine) and Granulator (bottom machine). This indicates that the cables/thermistor of this machine specifically are affected! 

Step 1 - Connect data cables

warning-iso_V2 Caution

Electrical hazard. If instructed, ensure to disconnect any power cables and ensure to NEVER touch the high voltage power supply seated inside the machine.

  1. TURN OFF both machines and DISCONNECT both power cables.
  2. Please check the data cable that runs on the outside of the machine, from the Controlbox to the Granulator or Shredder affected.
  3. Ensure the cable is plugged in fully and there is no debris in it.
    1. Optional: Use non-conductive 'contact cleaner' spray to clean the ports and improve connectivity.
  4. Ensure the cable is properly connected at both sides, in the correct port, as on the photo to the right.
  5. TURN ON both machines, and check if the error has been resolved.
Thermistor-cables

Step 2 - Check motherboard connection

Note:

If the granulator (bottom machine) is affected, this step requires to disassemble and remove the Shredder unit (mounted on top) before conducting this procedure.


  1. TURN OFF both machines and DISCONNECT both power cables.
  2. Remove the top panel of the machine where is the motherboard; this is the panel containing the red emergency stop.
  3. Unplug and plug back the connector of the thermistor from the mother board, as displayed in the photo.
    1. Optional: Use non-conductive 'contact cleaner' spray to clean the port and improve connectivity.
  4. Reinstall the top panel.
  5. Reconnect both power cables and start the machine to see if the issue is resolved.

Step 3 - Replace thermistor

If the two steps above did not resolve the issue, the Thermistor itself, the cable or the connector might be damaged and requires a replacement.

Contact support

Please contact us for instructions and further help, to have your thermistor replaced.