How to deal with the fault of Siemens inverter F0012? -Solutions - Huaqiang Electronic Network

Photocoupler

F0012 indicates that the inverter temperature signal is lost. At this time, the motor temperature sensor or cable may be in an open or short circuit state. The fault point can be determined by the exclusion method.
1. You can use a multimeter to detect cable continuity.
2. If the conditions permit, the inverter can be exchanged to other identical equipment to determine whether the inverter is good or bad.
3. Most of the hardware problems of the inverter, F0012 is the temperature sensor disconnection, if it is really broken, the inverter should be reported to F0012 when it is powered on. When the fan is started for 5-6 minutes, it is reported to F0012, which means that it is not a real disconnection, but a 'temperature sensor circuit disconnection' that occurs after the internal temperature of the inverter rises. This disconnection may be caused by thermal expansion and contraction. Such as solder joint solder joint, pin connection, plug oxidation.
4. The quality problem of the sensor itself is broken after being heated. This problem is easier to judge. Try a temperature sensor to see if it is a problem.