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EnergyFaults — error codes and troubleshooting for energy devices
EV ChargersPulsar Plus
Error 102

Wallbox

Wallbox Error 102

Internal relay stuck

Severity

High

Safe to continue?

No

Technician required?

Recommended

Last verified

September 2026

First safe check

Power-cycle the charger at the dedicated circuit breaker exactly as the manufacturer documents.

What does Error 102 mean?

The app reports error 102 when the charger’s internal relay is stuck. The documented first step is a power cycle at the circuit breaker; if the code returns, the unit needs service attention.

Which models use this code?

Verified for

  • Wallbox — Pulsar Plus

Most likely causes

01

Contactor or relay did not release

Manufacturer documented

A stuck relay prevents the unit from safely starting a new session.

Safe checks you can perform

  1. 1

    Power-cycle at the breaker

    Isolate the unit, wait for the documented interval and restore power.

  2. 2

    Stop retrying if the code persists

    A relay that keeps failing to release is a hardware condition, not a user-resettable one.

These steps stay outside the enclosure. Never open high-voltage equipment, bypass safety devices or work on live wiring.

When to stop troubleshooting

Stop and contact a qualified technician if the fault returns immediately, the device smells burnt, visible wiring damage exists, the enclosure is hot to the touch, or the manufacturer specifies professional service.

Can a reset clear this fault?

Documented reset behaviour: yes. Use only the manufacturer-approved restart sequence for this device and never bridge or bypass a safety mechanism to clear a fault.

Related symptoms

Red light on chargerNot charging at all

Related fault codes

3 red blinksThermal throttle; current reduced8 red flashesConfigured current incompatible with vehicleRed flashesFault detected; charging haltedSolid blue (over 15 minutes)Soft ground fault detectedSolid red LEDFault detected; station will not chargeError 101Connection or internal error

Sources

  • Wallbox Support — App Error Codes

    View
    Manufacturer
    Wallbox
    Document version
    —
    Section / page
    App error codes
    Verified
    September 2026

    Error 102 indicates the internal relay is stuck and a power cycle at the breaker is prescribed.

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Disclaimer

EnergyFaults provides informational troubleshooting guidance. Electrical and high-voltage equipment should only be serviced by qualified professionals where required. Always follow the manufacturer documentation for your exact model.