- Networks
- Garage door openers
E2
Somfy E2 garage door motor: safety input stays active
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
On Somfy Dexxo Pro 800 RTS and 1000 RTS openers, code E2 appears when the safety input stays active for more than three minutes. Clear the doorway, gently wipe the photocell lenses, and check for visible misalignment without bypassing any sensor; call an installer if E2 remains.
Safety first
Stop and check this first
- Never bypass, bridge, or set P2=0 to ignore photoelectric cells or a sensor bar showing E2, and never touch door springs or lifting cables under tension.
- Always cut the electric power supply to the motor before any technician work on peripherals, and never clean the unit with high-pressure water.
Safe checks you can perform
- Clear visible obstructions around cells or sensor bar
- Wipe the optical lenses gently and check alignment
- Record the installed safety peripheral for the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Check parameter P2 configuration for fault code E2
- Do not attempt this professional task: Inspect safety device wiring and optical alignment off-power
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Check parameter P2 configuration for fault code E2
What they doThe installer verifies in the Dexxo Pro setup menu that parameter P2 matches the connected safety device (with or without self-test) without disabling any installed protection.
They must show youthe current parameter P2 value on the display and how it matches the installed cells or sensor bar.
In writinginitial and final P2 setting, type of safety peripheral wired, and whether E2 cleared.
Inspect safety device wiring and optical alignment off-power
What they doAfter disconnecting the 230 V mains supply and any backup battery, the technician inspects the safety input wiring, aligns the photoelectric cells, and verifies reversal on a 50 mm obstacle.
They must show youthe aligned photoelectric cells, checked terminal wiring, and passing 50 mm obstacle reversal test.
In writingwiring inspection findings, optical alignment adjustment performed, and final operating code C1.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Clear visible obstructions around cells or sensor bar
- Who:
- you, standing clear of the door travel path while the door is stationary.
- How:
- check that no vehicle, object, or debris is interrupting the photoelectric cells or pressing against the bottom sensor bar while E2 is shown on the display.
- Result that matters:
- rule out a physical obstruction lasting more than three minutes across the garage entrance.
- If the doorway is clear and E2 disappears when a safe command is given:
- note what was blocking the sensor.
- If E2 stays on the display with nothing in the doorway:
- proceed to inspect lens cleanliness and alignment.
- Evidence to keep:
- condition of the doorway path and the 2-character display reading before and after clearing it.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
Wipe the optical lenses gently and check alignment
- Who:
- you, with the garage door stopped and without loosening brackets or touching wiring.
- How:
- wipe the photoelectric cell lenses gently with a soft cloth without using high-pressure water, and look to see whether a bracket has been knocked out of line.
- Result that matters:
- safely verify whether surface dirt or a visibly shifted housing is keeping the safety input active for E2.
- If cleaning restores standby code C1 on the display:
- observe the next complete open and close cycle.
- If a bracket is visibly shifted or E2 persists after wiping:
- leave wiring untouched and book an installer.
- Evidence to keep:
- photo of the cell brackets and the code displayed on the motor head after cleaning.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
Record the installed safety peripheral for the technician
- Who:
- you, reviewing your installation handover notes without removing the motor cover.
- How:
- note whether your door uses TX/RX photoelectric cells, a reflex cell, or a sensor bar, and whether C6 changes to E2 after three minutes.
- Result that matters:
- give the technician the exact peripheral details needed to check parameter P2 and the safety circuit.
- If you identify the peripheral type and C6-to-E2 timing:
- share both details when the installer arrives.
- If you are unsure which safety device is wired:
- ask the professional to inspect the terminals and P2 setting.
- Evidence to keep:
- Dexxo Pro 800 or 1000 RTS model, installed safety accessory type, and observed E2 timing.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Networks
- Brand
- Somfy
- Product type
- Garage door openers
Known code variants
- 2 flashes
- 2 parpadeos
- ALFA Crea E2 error
- ALFA Duo embroidery hoop error
- ALFA E2
- cabezal tado E2
- Calibración incompleta de la carrera
- Calibrating the complete gate-travel
- CAME E2
- Code E2
- Código E2
- código E2 HP
- E 2
- E-2
- E0 instale la unidad de bordado ALFA
- E02
- E2
- E2 en tensiómetro de brazo Omron
- E2 no power wires detected
- E2 Omron
- E2 on Omron upper arm monitor
- El aro de bordado no está instalado o debe retirarse
- Embroidery hoop is not installed or should be removed
- Entrada de seguridad activa permanentemente
- Error 02
- Error 2
- Error E2
- error E2 ALFA Crea
- error E2 HP
- error E2 lavavajillas Smeg
- error E2 tado calibración
- Fallo del sensor de temperatura
- Hoover E02
- Hoover E2
- Hoover washing machine E02
- Hoover washing machine E2
- HP code E2
- HP DeskJet E2
- HP E2
- HP error E2
- HP Paper Mismatch
- HP Paper Size Mismatch
- HP Smart Tank E2
- Incompatibilidad de papel HP
- Incompatibilidad de tamaño de papel HP
- lavadora Hoover E02
- lavadora Hoover E2
- measurement cannot be completed after the arm cuff inflates
- Nest E2
- Nest E22
- Nest E402
- Nest E72
- Nest thermostat E2
- no se puede completar una medición después de inflar el manguito
- Omron E2 measurement not completed
- Omron E2 medición no completada
- Safety input always active
- Smeg dishwasher E2
- Smeg dishwasher error E2
- Smeg lavavajillas E2
- Smeg LVFABCR3 E2
- Smeg nivel de seguridad agua E2
- Smeg safety water level E2
- Somfy Dexxo Pro E2
- tado Basic cuatro rayas llave inglesa
- tado Basic four dashes spanner
- tado E2
- tado E2 calibration error
- tado radiator thermostat E2
- tado Smart Radiator Thermostat E2
- tado° E2
- Temperature sensor error
- termostato Nest E2
What it means
Somfy's installation manual for Dexxo Pro 800 RTS and Dexxo Pro 1000 RTS (5048550F) defines E2 as “Safety input always active”, shown on the 2-character LCD when photoelectric cells or a sensor bar keep the safety input active for over three minutes. Other Somfy operator families may use different fault codes. Code E2 alone does not prove that a photocell, sensor bar, or circuit board has failed.
Warnings and stop conditions
- Highsource verified
Never bypass, bridge, or set P2=0 to ignore photoelectric cells or a sensor bar showing E2, and never touch door springs or lifting cables under tension.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
- Mediumsource verified
Always cut the electric power supply to the motor before any technician work on peripherals, and never clean the unit with high-pressure water.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
Symptoms and causes
Probable causes · in order
- Obstacle or continuous pressure on cells or sensor barCommon
An object blocking the photoelectric beam or pressing the bottom sensor bar for more than three minutes turns status C6 into fault E2.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
- Dirty or misaligned photoelectric cells at the openingPossible
Lens contamination or lost optical alignment between transmitter, receiver, or reflex reflector holds the safety input active and triggers E2.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
- Incorrect parameter P2 setting or safety wiring faultPossible
A mismatch between parameter P2 and the connected safety peripheral, or damaged safety input wiring, causes the opener to display E2.
Evidence: Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
Virtual technician
Does E2 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Somfy Dexxo Pro 800 RTS y 1000 RTS: Manual de instalacion (5048551F)
Somfy · 2026 · official_doc
- 2
Somfy Dexxo Pro 800 RTS and 1000 RTS: Installation Manual (5048550F)
Somfy · 2026 · official_doc
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