EO Charging
EO Charging EV Home Chargers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Charger will not start charging; app or LED indicates E01 immediately after plugging in vehicle.
Proximity / Pilot Signal Fault
E02
Charging session aborted with E02; vehicle does not begin charging or stops within a few seconds.
Contactor Welded or Contactor Feedback Fault
E03
EO charger displays E03 and refuses to start charging; often occurs immediately after power‑up.
Ground Fault / Residual Current Detection Trip
E04
Charger shows E04 and will not energize; often associated with incorrect supply voltage or wiring.
Supply Voltage Out of Range / Phase Configuration Error
E05
EO charger displays E05 and refuses to start; often logged as an over‑temperature event.
Internal Overtemperature Protection Trip
E06
Charger shows E06 and does not start charging; often associated with missing or poor earth connection.
Earth / Ground Integrity Fault
E07
EO charger displays E07 and will not charge; often logged as a CP (control pilot) short or open fault.
Control Pilot Line Short / Open Circuit
E08
Charger shows E08 and stops charging; may indicate overcurrent or internal current sensor fault.
Overcurrent / Internal Current Sensor Error
E09
EO charger displays E09; charging is disabled and app may report insulation or isolation fault.
Insulation / Isolation Resistance Fault
E10
Charger shows E10 and does not respond to start commands; often logged as internal communication error.
Internal Communication / Microcontroller Fault
E11
EO charger displays E11; app may indicate RFID or user authentication error.
RFID / User Authentication Module Fault
E12
Charger shows E12; app may report network or cloud communication failure.
Network Connectivity / Backend Communication Fault
E13
EO charger displays E13; app may indicate load management or CT error.
External Load Management / Grid CT Fault
E14
Charger shows E14 and refuses to start; often associated with PEN fault detection on certain EO models.
PEN Conductor / Supply Neutral Fault (Where Equipped)
E15
EO charger displays E15; app may indicate contactor coil or driver fault.
Contactor Coil / Driver Circuit Fault
E16
Charger shows E16; app may report phase loss or phase imbalance on three‑phase EO chargers.
Phase Loss / Phase Imbalance Fault
E17
EO charger displays E17; app may indicate internal power supply fault.
Low‑Voltage Power Supply Failure
E18
Charger shows E18; app may report vehicle communication error or EVSE protocol fault.
EV‑to‑Charger Communication / PWM Fault
E19
EO charger displays E19; app may indicate metering or energy measurement error.
Internal Energy Meter / Measurement Fault
E20
Charger shows E20; app may indicate overvoltage protection trip.
Input Overvoltage Protection Trip
Symptom
EO charger emits a burning smell or visible smoke during or shortly after a charging session.
Severe Overheating / Component Failure
Symptom
EO charger enclosure feels unusually hot to the touch during or after charging.
Overheating of Internal Components
Symptom
EO charger intermittently stops charging mid‑session without any visible error code; charging resumes if unplugged and replugged.
Intermittent Pilot or Contactor Dropout
Symptom
EO charger makes a loud buzzing or chattering noise during charging.
Noisy Contactor / Coil Voltage Instability
Symptom
EO charger powers up but will not start charging; LEDs indicate ready but vehicle does not draw current and no error code is shown.
EV Not Detecting Charge Enable / Pilot Level Issue
Symptom
EO charger trips the upstream MCB or main breaker during charging.
Overcurrent / Short Circuit on Supply
Symptom
EO charger trips the upstream RCD/RCBO as soon as a vehicle is plugged in.
Earth Leakage on Output / Nuisance RCD Tripping
Symptom
EO charger’s built‑in cable insulation is cracked, cut, or heavily worn.
Mechanical Damage to Tethered Cable
Symptom
EO charger’s built‑in cable will not latch securely into the vehicle or falls out easily.
Mechanical Latch Wear on Type 2 Plug
Symptom
EO charger’s enclosure is cracked or has visible physical damage from impact.
Compromised Enclosure Integrity
Symptom
EO charger’s front LEDs are flashing in an unusual pattern not documented in the user guide, and charging is unreliable.
Firmware / Configuration Corruption
Symptom
EO charger’s LEDs indicate charging, but the vehicle’s dashboard shows no increase in state of charge over time.
False Charge Indication / No Output Current
Symptom
EO charger’s Type 2 socket flap or cover is broken or will not close properly.
Mechanical Damage to Socket Cover
Symptom
EO charger’s Wi‑Fi or Ethernet connection frequently drops, causing remote control and monitoring to fail.
Unstable Network Connectivity
Symptom
EO home charger has no power at all; LEDs are off and it is not visible in the app.
No Mains Supply / Internal Fuse Failure
Symptom
RFID cards or fobs that used to work with the EO charger are no longer recognized.
RFID Reader Degradation / Configuration Loss
Symptom
Water or condensation visible inside EO charger enclosure or around cable glands.
Moisture Ingress / IP Seal Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Charger will not start charging; app or LED indicates E01 immediately after plugging in vehicle.
|
Proximity / Pilot Signal Fault | View Details |
| E02 |
Charging session aborted with E02; vehicle does not begin charging or stops within a few seconds.
|
Contactor Welded or Contactor Feedback Fault | View Details |
| E03 |
EO charger displays E03 and refuses to start charging; often occurs immediately after power‑up.
|
Ground Fault / Residual Current Detection Trip | View Details |
| E04 |
Charger shows E04 and will not energize; often associated with incorrect supply voltage or wiring.
|
Supply Voltage Out of Range / Phase Configuration Error | View Details |
| E05 |
EO charger displays E05 and refuses to start; often logged as an over‑temperature event.
|
Internal Overtemperature Protection Trip | View Details |
| E06 |
Charger shows E06 and does not start charging; often associated with missing or poor earth connection.
|
Earth / Ground Integrity Fault | View Details |
| E07 |
EO charger displays E07 and will not charge; often logged as a CP (control pilot) short or open fault.
|
Control Pilot Line Short / Open Circuit | View Details |
| E08 |
Charger shows E08 and stops charging; may indicate overcurrent or internal current sensor fault.
|
Overcurrent / Internal Current Sensor Error | View Details |
| E09 |
EO charger displays E09; charging is disabled and app may report insulation or isolation fault.
|
Insulation / Isolation Resistance Fault | View Details |
| E10 |
Charger shows E10 and does not respond to start commands; often logged as internal communication error.
|
Internal Communication / Microcontroller Fault | View Details |
| E11 |
EO charger displays E11; app may indicate RFID or user authentication error.
|
RFID / User Authentication Module Fault | View Details |
| E12 |
Charger shows E12; app may report network or cloud communication failure.
|
Network Connectivity / Backend Communication Fault | View Details |
| E13 |
EO charger displays E13; app may indicate load management or CT error.
|
External Load Management / Grid CT Fault | View Details |
| E14 |
Charger shows E14 and refuses to start; often associated with PEN fault detection on certain EO models.
|
PEN Conductor / Supply Neutral Fault (Where Equipped) | View Details |
| E15 |
EO charger displays E15; app may indicate contactor coil or driver fault.
|
Contactor Coil / Driver Circuit Fault | View Details |
| E16 |
Charger shows E16; app may report phase loss or phase imbalance on three‑phase EO chargers.
|
Phase Loss / Phase Imbalance Fault | View Details |
| E17 |
EO charger displays E17; app may indicate internal power supply fault.
|
Low‑Voltage Power Supply Failure | View Details |
| E18 |
Charger shows E18; app may report vehicle communication error or EVSE protocol fault.
|
EV‑to‑Charger Communication / PWM Fault | View Details |
| E19 |
EO charger displays E19; app may indicate metering or energy measurement error.
|
Internal Energy Meter / Measurement Fault | View Details |
| E20 |
Charger shows E20; app may indicate overvoltage protection trip.
|
Input Overvoltage Protection Trip | View Details |
| – |
EO charger emits a burning smell or visible smoke during or shortly after a charging session.
|
Severe Overheating / Component Failure | View Details |
| – |
EO charger enclosure feels unusually hot to the touch during or after charging.
|
Overheating of Internal Components | View Details |
| – |
EO charger intermittently stops charging mid‑session without any visible error code; charging resumes if unplugged and replugged.
|
Intermittent Pilot or Contactor Dropout | View Details |
| – |
EO charger makes a loud buzzing or chattering noise during charging.
|
Noisy Contactor / Coil Voltage Instability | View Details |
| – |
EO charger powers up but will not start charging; LEDs indicate ready but vehicle does not draw current and no error code is shown.
|
EV Not Detecting Charge Enable / Pilot Level Issue | View Details |
| – |
EO charger trips the upstream MCB or main breaker during charging.
|
Overcurrent / Short Circuit on Supply | View Details |
| – |
EO charger trips the upstream RCD/RCBO as soon as a vehicle is plugged in.
|
Earth Leakage on Output / Nuisance RCD Tripping | View Details |
| – |
EO charger’s built‑in cable insulation is cracked, cut, or heavily worn.
|
Mechanical Damage to Tethered Cable | View Details |
| – |
EO charger’s built‑in cable will not latch securely into the vehicle or falls out easily.
|
Mechanical Latch Wear on Type 2 Plug | View Details |
| – |
EO charger’s enclosure is cracked or has visible physical damage from impact.
|
Compromised Enclosure Integrity | View Details |
| – |
EO charger’s front LEDs are flashing in an unusual pattern not documented in the user guide, and charging is unreliable.
|
Firmware / Configuration Corruption | View Details |
| – |
EO charger’s LEDs indicate charging, but the vehicle’s dashboard shows no increase in state of charge over time.
|
False Charge Indication / No Output Current | View Details |
| – |
EO charger’s Type 2 socket flap or cover is broken or will not close properly.
|
Mechanical Damage to Socket Cover | View Details |
| – |
EO charger’s Wi‑Fi or Ethernet connection frequently drops, causing remote control and monitoring to fail.
|
Unstable Network Connectivity | View Details |
| – |
EO home charger has no power at all; LEDs are off and it is not visible in the app.
|
No Mains Supply / Internal Fuse Failure | View Details |
| – |
RFID cards or fobs that used to work with the EO charger are no longer recognized.
|
RFID Reader Degradation / Configuration Loss | View Details |
| – |
Water or condensation visible inside EO charger enclosure or around cable glands.
|
Moisture Ingress / IP Seal Failure | View Details |
No matching codes found
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