Error code S

Last updated: August 12, 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 S indicates that the motherboard has a signal jam, which is a definitive hardware failure. As a result, the entire system cannot work anymore. In tandem with this code, the status light will be cycling and emitting different colors in sequence.

🪛 Repair or Replacement

Please kindly replace the motherboard after receiving this error code. Feel free to keep the cat sensor as backup and skip the corresponding section in the video, as it is not applicable to the present issue.

For the replacement parts:

• Please contact our Customer Care Department if your unit is under warranty.
• If out of policy, kindly refer to the corresponding parts listed in our store: Motherboard & Cat Sensor for Popur S7.
• Video guide: https://youtu.be/x5ucrnZZ5dQ.

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 motherboard you received is baked with firmware 3.6.0 or earlier version, it will be incompatible with the rest of the system, as well as App 2.0.0 version. You can tell this info in the Popur S7 App → Device Page → Top-right icon for Settings → Technical info.

While the core functions including auto-clean remains intact, a suite of new features won't work.

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.