CU: Temperature sensor fault
Siemens · DCM
What does A03520 mean?
An error occurred during evaluation of the temperature sensor, which is expected to be an Ni1000 or PT1000 connected via an analog input (AI2 or AI3). Possible causes include wire breakage, the sensor not being connected, or a short circuit leading to a measured resistance that is too low. This can result in inaccurate temperature monitoring and potential overheating if not addressed.
Complete Troubleshooting Guide
- 1
Ensure that the temperature sensor is connected correctly and securely to the specified analog input.
- 2
Check the sensor for proper function using a multimeter or by comparison with a known good sensor, and replace it if it is faulty.
- 3
If a temperature sensor is not required for the application, change the analog input type to 'no sensor connected' by setting parameter p0756 = 8.