E12
Parkside
Internal Communication Error (Main PCB to Sensor Bus)
Robot mower shows E12 and stops randomly during operation; may restart after power cycle.
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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 internal wiring harness, Oxidized multi‑pin connectors, Failing main control PCB, Electrical noise from failing motor
How to Fix / Troubleshooting
Safety first: Power OFF and remove the battery before opening the mower.
- Inspect all harnesses: Open the housing and locate the main wiring harnesses connecting sensors (lift, tilt, bumper, rain, wheel encoders) to the main PCB. Gently tug each connector to ensure it is fully seated.
- Clean connectors: Disconnect one connector at a time, spray with contact cleaner, and reconnect firmly.
- Check for pinched cables: Look for cables trapped between plastic parts or rubbing on sharp edges. Re‑route and secure with cable ties.
- Observe pattern: Note if E12 occurs when a specific action happens (e.g., turning, lifting). This can point to a particular sensor cable that moves and loses contact.
When to replace: If all connectors are secure and E12 persists unpredictably, the main PCB may have an internal fault and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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