E7 error and thermostat cannot detect presence or motion for occupancy-based control.

Safety: No high-voltage work is required for this procedure.

• Step 1 – Check settings:
  • Ensure Occupancy detection or Eco mode is enabled if you expect motion-based control.
• Step 2 – Clear obstructions:
  • Remove any objects, stickers, or dirt covering the sensor window.
  • Clean gently with a dry cloth.
• Step 3 – Test detection:
  • Stand in front of the thermostat and move within the detection range.
  • Check if the display wakes or occupancy icon changes.
• Step 4 – Firmware update:
  • Update thermostat firmware if occupancy-related fixes are available.
• Step 5 – Replace thermostat if PIR is defective:
  • If E7 persists and occupancy is required, replace the Protherm smart thermostat.