Safety first: Remove the battery immediately if you smell burning or feel excessive heat. Do not continue to operate the vacuum.

Step 1 – Check for blockages and filter condition: Ensure there is no mechanical overload causing high current draw. Clear all clogs and clean filters.
Step 2 – Test on lowest mode: Insert the battery and run the vacuum on the lowest power setting only. If E14 still appears and the motor pulses, switch off and remove the battery.
Step 3 – Internal inspection (advanced): Open the main body and inspect the control PCB for burnt components, especially near the motor connectors and large transistors (MOSFETs).
Step 4 – Replace faulty modules: If the motor shows signs of overheating or discoloration, replace the main motor assembly. If the PCB has burnt or cracked components, replace the entire control PCB with a genuine Princess part.
Step 5 – Professional repair recommended: Because this fault involves high‑current electronics, it is best handled by a qualified technician.

Vacuum shows E14 and the LED ring flashes blue/red; the motor pulses but does not reach full speed.

Possible Causes