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LD301 Blinking

LD301 Blinking - RPi-MCU Communication Error

Wallbox · Pulsar Plus Chargers

What does LD301 Blinking mean?

The LD301 LED blinking on the Carrier board indicates a communication issue between the Raspberry Pi (RPi) and the Microcontroller Unit (MCU).

Common Causes

  • Internal communication failure
  • Faulty connection between RPi and MCU
  • Software glitch affecting communication

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power cycle the charger by turning off the circuit breaker for 30 seconds, then turning it back on.

  2. 2

    Ensure the charger cover is securely fastened.

  3. 3

    Check if any other LEDs on the Carrier board are lit or blinking unusually.

  4. 4

    If the problem persists after a restart, internal hardware may be faulty. Contact support.

Browse all codes in this manual (20)
Verified technical data. Last updated: April 2026

Related Faults

Blinking LEDBlinking LED - Communication Issue or StandbyBlue LEDBlue LED - Wi-Fi connection establishedCharger appears on nearby devices - NoCharger not found via Bluetooth - Connection issue
Source: Wallbox Pulsar Plus Chargers
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