- EV charging
- EV charger
106
Wallbox 106: the control-pilot signal voltage was outside its standard ranges
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
106 means the control-pilot signal voltage was outside its standard ranges in the cited charger family. The deciding observation is whether 106 returns before charging begins after one disconnected restart. Do not infer a failed part from the code alone.
Safety first
Stop and check this first
- Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Safe checks you can perform
- Capture the exact charger, vehicle and pattern
- Run the one deciding check
- Use recurrence as the stop point
Leave these tasks to a qualified professional
- Do not attempt this professional task: Measured handoff for 106
What a technician must be able to justify
A technician is coming
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.
Measured handoff for 106
What they doCapture CP voltage/state with the exact vehicle connected and disconnected, then test cable continuity and charger output against the applicable standard.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Checks and evidence, step by step
Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
- 1
Capture the exact charger, vehicle and pattern
No special tools
Procedure
Photograph 106 and record the Wallbox model, part/serial number, vehicle model, cable used, charge stage and approximate time. Do not clear the event before those facts are saved.
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
- 2
Run the one deciding check
No special tools
Procedure
Switch off the charger, disconnect the vehicle, inspect the connector face without opening anything, restart once and retry. Record whether 106 returns before charging begins after one disconnected restart. Change one condition only.
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
- 3
Use recurrence as the stop point
No special tools
Procedure
If charging begins, the CP voltage returned to an accepted state during the controlled attempt; retain the event rather than naming a failed board. A returning 106 proves an abnormal CP state, not whether it is created by cable, vehicle or charger electronics.
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- EV charging
- Brand
- Wallbox
- Product type
- EV charger
Known code variants
- cargador Wallbox 106
- caricatore Wallbox 106
- chargeur Wallbox 106
- code Wallbox 106
- codice Wallbox 106
- código Wallbox 106
- erreur Wallbox 106
- error Wallbox 106
- errore Wallbox 106
- événement Fronius 106
- evento Fronius 106
- Fronius Ereignis 106
- Fronius event 106
- Fronius inverter 106
- Fronius Symo / Eco 106
- Fronius Wechselrichter 106
- inversor Fronius 106
- inverter Fronius 106
- onduleur Fronius 106
- Wallbox app code 106
- Wallbox charger 106
- Wallbox error 106
- Wallbox Fehler 106
- Wallbox Fehlercode 106
- Wallbox Ladegerät 106
What it means
Wallbox’s official documentation defines 106 as the control-pilot signal voltage was outside its standard ranges. That is the protection or controller state, not a universal component diagnosis. If charging begins, the CP voltage returned to an accepted state during the controlled attempt; retain the event rather than naming a failed board. A returning 106 proves an abnormal CP state, not whether it is created by cable, vehicle or charger electronics.
Warnings and stop conditions
- Highsource verified
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
Symptoms and causes
Probable causes · in order
- What the manufacturer code establishesConfirmed
Wallbox documents 106 as a state in which the control-pilot signal voltage was outside its standard ranges. Keep this meaning scoped to the cited charger family and exact light/code pattern.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
- What the result changes — and what it does not provePossible
If charging begins, the CP voltage returned to an accepted state during the controlled attempt; retain the event rather than naming a failed board. A returning 106 proves an abnormal CP state, not whether it is created by cable, vehicle or charger electronics.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
Virtual technician
Does 106 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
Understanding Wallbox app Error Codes and How to Resolve Them
Wallbox · 2025 · official_doc
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