Error code E

Last updated: August 8, 2026
Applicable model: Popur S7 Split Litter System (SLS)
Applicable firmware version: 4.0.0 & onwards
Applicable mobile app version: 2.0.0 & onwards (both Android & iOS)

🔍 Troubleshooting Suggestions

Error code E indicates that the position sensor for the litter tray is operating intermittently or inconsistently. The tray may be found rested in an abnormal position, such as slightly elevated. In tandem with this code, the status light will also turn into the solid red color.

Typically, the system can be recovered or at least temporarily restored by recalibrating the position sensor as follows:

  • Popur S7 App → Device Page → Top-right icon for Settings → Spin → Recalibrate sensor → Recalibrate
  • Alternatively, hold the Clean/Play button for 3 seconds—and do this AGAIN within 10 seconds.

Once the calibration process is triggered, the rotor unit will rotate back and forth briefly before resting at the neutral position which is its default standby state. Otherwise, reboot the machine or perform the self-check again. If the position is still incorrect or the solid red light recurs, a new power supply board module will be needed.

🪛 Repair or Replacement

We recommend replacing the power supply board to permanently resolve the issue if this error code appears. Since the load cells are soldered directly to the circuit board, they must be replaced together as a complete assembly. This design offers better reliability, durability, and signal consistency than pin-connected alternatives.

After the replacement, please recalibrate the weight sensor using Popur S7 App → Device Page → Top-right icon for Settings → Scale → Recalibrate scale → Confirm, or follow this video guide: https://youtu.be/H8SOgcMz7Wo.

For the replacement parts:

Warm reminder: If you don't hear from us within 48 hours, it suggests that your email provider has spammed or blocked our reply. Please add our domain (@popur.com) to your approved senders list or check the junk folder. You may go ahead purchase the above parts first to save shipping time, and ask for a refund retrospectively. Please note this type of refund can only be issued via non-expiring store credit as a warranty arrangement.

🚩 Special Case for Incompatible Software after Replacement

If the new power supply board you received is baked with firmware 3.6.0 or earlier version, it will be incompatible with the rest of the system. While the core features remain functional, including auto-clean and App 2.0.0 version, a suite of new functionalities won't work.

The easiest way to tell this info is by turning on the Auto power-cycle feature in the Popur S7 App → Device Page → Top-right icon for Settings → Spin → Auto power-cycle. Then, reboot the machine to see whether or not it automatically power cycles. If not, the new power supply board is on legacy firmware.

To address this incompatibility, simply update to firmware 4.0.0 or onwards in the Popur S7 App → Device Page → Top-right icon for Settings → Firmware update. If there is no newer version to install, please contact us so that we could manually push over a new version for you to install.