What is the fault code of Yangzi kFR inverter air conditioner showing 51?

The air conditioner e51 means sensor failure. It is suspected that the sensor is faulty. Please refer to the following.

The cause and repair method of the outdoor unit of the air conditioner not working: The difference between the indoor temperature and the set temperature is too small, causing the outdoor unit of the Midea air conditioner to not work; reset the cooling temperature. The air conditioner temperature probe or temperature sensor is damaged; repair or replace it in time. Check whether the outdoor fan of the air conditioner is working:

If the fan is working and the compressor is not working, it is likely that the air conditioner compressor or starting capacitor is damaged; repair or replace it in time. The air conditioning fan and compressor are not working; check whether the outdoor unit has sufficient voltage; check and eliminate.

Maintenance tips:

If the machine is forced to operate without checking the cause of the fault, it will cause over-voltage or over-current in the circuit, thus damaging some normal components.

Air conditioners commonly use four fuses, which are installed in the indoor unit control panel, outdoor control panel, power board, and main power circuit. A blown fuse is often caused by a short circuit in the corresponding circuit or circuit. If you only replace the fuse without finding the cause of the fault, its components may be damaged due to overcurrent and overvoltage.

Air conditioners usually only have 2 to 3 starting capacitors, and the empty capacity is between 480 and 2000uf. If the capacitor breaks down, breaks, or changes in parameters or power circuits, current faults will occur, thus damaging some components. components, preventing the compressor from starting normally.