F3
OKP
Main Motor Driver Circuit Fault
F3 appears and suction motor does not start, but brush head may still have power.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Burned motor driver MOSFETs on PCB, Shorted main suction motor, Damaged motor wiring harness, Overvoltage event from charger
How to Fix / Troubleshooting
Safety first: Remove the battery. Do not attempt to run the vacuum until the fault is resolved.
- Check for burning smell: Smell near the motor vents. A burnt odor suggests motor or PCB damage.
- Inspect wiring (external): Without opening the body, gently move the motor housing and listen for loose parts or rattling that might indicate internal damage.
- Do not bypass protection: Never attempt to short contacts or bypass safety circuits to force the motor to run.
- Service required: This fault almost always requires replacement of the main suction motor assembly and/or the main control PCB. Contact a qualified service center.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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