The Parkside robotic mower turns in circles near its station, displays an error code, or refuses to start after a PIN code change. Before contacting Lidl customer service, a reset often suffices to resolve the situation. The procedure depends on the model and its generation, as Parkside has evolved its robotic mowers with both physical controls and those operated via a mobile app.
Resetting the PIN code on Parkside PMRDA 20-Li robots
On the PMRDA 20-Li A1 models sold from 2022 onwards, the four-digit PIN protects access to the control panel. When this code is forgotten, the robot locks, and no menu is accessible. Restoring factory settings erases the PIN and returns all values to default.
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To access it, simultaneously hold the STOP button and the HOME button for several seconds until the screen displays the restore option. The exact manipulation varies slightly depending on the firmware version. If the screen remains frozen, first turn off the robot using the main switch located under the cover, wait about thirty seconds, then turn it back on before trying the button combination again.
For those looking for how to reset a Parkside robotic mower with a complete maintenance guide, the factory restore procedure is the first step before any other maintenance intervention.
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Software reset via the Parkside app
Since 2023, Bluetooth or radio-connected models (M1 generation and later) pair with the Parkside mobile app. This connection adds a layer of reset that the older paper manuals do not document. When the robot displays a communication error or refuses to respond to app commands, deleting and then re-pairing the robot in the app resolves most blockages.
Here’s how to proceed:
- Open the Parkside app and access the settings of the registered robot, then select “Remove device” to completely dissociate the robot from the account.
- Perform the factory reset directly on the robot’s panel (button combination described above) so that Bluetooth goes back into pairing mode.
- Restart the app, search for the robot using the device addition function, and follow the initial setup steps as during the first installation.
This double reset (app plus robot) is essential for errors like “connection lost” or PIN conflicts between the app and the physical panel. Feedback on specialized forums confirms that removing the pairing before the factory reset avoids recurring synchronization errors.
Error “Loop Signal Lost” on Parkside robotic mower: what to do before resetting
The message “Loop Signal Lost” regularly appears on the PMRDA 20. It indicates that the robot can no longer detect the signal from the perimeter wire. One might immediately think of a software bug, but in most cases, the problem comes from the wire or the charging station, not the firmware.
Before any reset, check three points:
- The condition of the perimeter wire along its entire length, looking for cuts, crushing, or oxidation at the connectors of the station.
- The distance between the wire and the charging station, which must respect the spacing indicated in the manual (a wire too far or too close to the base disrupts signal detection).
- The power supply of the station itself, as a faulty transformer cuts the loop signal without triggering any other visible alert.
If these checks yield nothing, then restoring factory settings may recalibrate signal detection. Feedback varies on this point: some users solve the problem with a simple restart, while others must reinstall the wire on a section.
Differences between Parkside generations: identify your model before resetting
Parkside has marketed several series since 2022, and Lidl now publishes separate help sheets by reference on the Parkside-DIY portal. The reset procedure differs according to the exact reference of the robot (PMRDA 20-Li A1, M1, and later versions). Applying the wrong button sequence may simply yield no result, or in some cases, reset only the mowing schedule without affecting the PIN.
The model reference is on the label stuck under the robot’s cover, next to the serial number. This number allows access to the correct product sheet on the Parkside-DIY portal and to download the specific manual for its version. The generic manuals found online sometimes group several generations, leading to confusion over button combinations.
For recent app-controlled models, a complete reset always goes through the app in addition to the physical panel. For older models without connectivity, the control panel remains the only access to factory restoration.
A often overlooked point: after any factory reset, the robot must remap the mowing area and relearn secondary zones if they were configured. Therefore, a complete mowing session is planned before judging whether the initial problem is resolved. Resetting a Parkside robotic mower takes only a few minutes, but the subsequent reconfiguration requires reprogramming the schedules, zones, and PIN from scratch.