E20
Kress
Real‑Time Clock / Scheduling Error
Robot mower shows E20 and stops; may be associated with internal clock or schedule issues.
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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
RTC battery depleted on main board, Firmware bug affecting schedule, Main board clock circuit failure
How to Fix / Troubleshooting
Safety first: Turn OFF main power before opening the housing.
- Reset date and time: Using the mower's display or Kress app, re‑enter the correct date, time, and mowing schedule. Save and restart.
- Power cycle: Turn the mower OFF for 60 seconds, then ON again to reinitialize the clock.
- Firmware update: If supported, update the mower firmware to the latest version to correct known RTC issues.
- Board‑level repair: If E20 persists and the time resets frequently, the RTC backup battery or clock circuit on the Main Control Board is likely defective and the board should be replaced.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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