E15
Eufy
Internal Communication Bus Error
Robot vacuum reports E15 and may not start; sometimes associated with internal communication error between modules.
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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
Loose cable between main PCB and sensor boards, Corrupted firmware, Damaged main control board, Shorted peripheral module (e.g., LDS, wheel encoder board)
How to Fix / Troubleshooting
Safety first: Turn OFF the robot and remove it from the charging base.
Step-by-step:
- Power cycle: Leave the robot powered off for 5 minutes, then turn it back on and test. This can clear transient bus errors.
- Factory reset: Perform a factory reset via the app or button sequence as per the manual.
- Check for moisture: If the robot was recently exposed to water, allow it to dry completely in a warm, dry area for 24–48 hours before further use.
- Advanced inspection: Open the robot and inspect all ribbon cables and harnesses connecting the main PCB to wheel modules, LDS (if present), and sensor boards. Reseat each connector carefully.
- Module isolation: If possible, disconnect suspected faulty modules one at a time (e.g., LDS, side brush board) and test whether E15 clears, to identify the shorted component. Replace the defective module or the main control board if necessary.
When to stop: Bus-level diagnostics can be complex; if reseating connectors does not help, seek professional repair.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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