¶ Issue Description
This alert indicates that the actual temperature of the heatbed is higher than the set temperature.
Example of heatbed temperature control anomaly, heater over temperature
The temperature control system of the heatbed for the X/P/A1 series printers is shown below, mainly including: MC board, AC board, power supply, and heatbed (including heatbed temperature sensor). The MC board issues heatbed temperature control commands to control the AC board to supply power and heat the heatbed. Meanwhile, the temperature sensor on the heatbed feeds back the actual temperature of the heatbed to the MC board, achieving a closed-loop temperature control of the heatbed. The A1mini printer mainly includes: motherboard, power supply, and heatbed (including heatbed temperature sensor), where the motherboard integrates the functions of the MC board and AC board.
Schematic diagram of the heatbed temperature control system
Common reasons for the actual temperature of the heatbed exceeding the set temperature are:
- Abnormal heating power supply chain of the heatbed (AC board/motherboard failure), causing continuous power supply and heating to the heatbed
- Heatbed temperature sensor failure, resulting in incorrect identification of the heatbed temperature**
¶ Troubleshooting
¶ Fault Isolation Procedure
This chart illustrates the general troubleshooting procedure, including critical judgments, checks, and actions.
Heatbed over-temperature fault isolation process
¶ Actions
- Abnormal heating power supply chain of the heatbed
- For X/P printers, replace the AC board
- For A1 printers, replace the AC board
- For A1mini printers, replace the motherboard
- Abnormal temperature measurement chain of the heatbed
- For X/P printers, replace the V3 heatbed/replace the V2 heatbed
- For A1 printers, replace the heatbed
- For A1mini printers, replace the heatbed
¶ End Notes
We hope the detailed guide provided has been helpful and informative.
To ensure a safe and effective execution, if you have any concerns or questions about the process described in this article, we recommend submitting a Technical ticket regarding your issue. Please include a picture or video illustrating the problem, as well as any additional information related to your inquiry.