Grizzl-E EV Home Chargers Error Codes

E01

Charger will not start charging; vehicle shows ‘Charging Error’; Grizzl‑E status LED solid red immediately after plugging in

Ground Fault / Leakage Current Detected

E02

Charger powers up but will not charge; LEDs indicate error; vehicle displays ‘Check power source’ or ‘Charging station error’

Pilot Signal Communication Failure

E03

Charger LEDs show error shortly after plugging in; vehicle may start then immediately stop charging

Contactor Welded or Contactor Feedback Fault

E04

Charger will not power up; no LEDs or only a brief flash followed by error indication; breaker is ON

Input Voltage Out of Range / Line Voltage Error

E05

Charger starts charging then stops after a short time; LEDs indicate over‑temperature or thermal error

Overtemperature Protection Trip

E06

Charger indicates error when vehicle is connected; vehicle may show ‘Grounding issue’ or ‘Check earth connection’

Protective Earth / Ground Continuity Fault

E07

Charger LEDs show error; vehicle will not charge; error appears immediately when EV is connected

Proximity / Latch Switch Fault in J1772 Handle

E08

Charger indicates error; vehicle may show ‘Overcurrent’ or ‘Charging limited’; charging stops under heavy load

Output Overcurrent / Current Sensor Fault

E09

Charger LEDs show an error; the unit may not power up fully; this occurs after a lightning storm or power surge.

Surge Protection / MOV Failure

E10

Charger LEDs indicate an error; the unit may intermittently reboot or flicker, resulting in no stable operation.

Low‑Voltage Power Supply Fault

E11

Charger LEDs show an error; the vehicle reports ‘Incorrect wiring’ or ‘Line/Neutral reversed’.

Line Wiring / Phase Detection Error

E12

Charger LEDs indicate an error; the unit refuses to start charging after its internal self-test.

Self‑Test / Internal Diagnostic Failure

E13

Charger LEDs show an error; the vehicle indicates ‘Pilot error’ or ‘EVSE error’; this occurs with multiple vehicles.

Pilot Duty Cycle / Current Limit Encoding Error

E14

Charger LEDs indicate an error; the unit trips the breaker when starting to charge or immediately after connection.

Internal Short Circuit / Insulation Failure

E15

Charger LEDs show an error; the unit appears to power on but does not respond correctly to a vehicle connection.

Microcontroller / Logic Fault

E16

Charger LEDs indicate an error; the unit reports ‘relay test fail’ or similar during startup (if diagnostic LEDs are available).

Stuck or Non‑Operating Contactor

E17

Charger LEDs show an error; the unit may start but then immediately stop when the vehicle requests current.

Output Relay / Contactor Feedback Mismatch

E18

Charger LEDs indicate an error; the unit refuses to charge when connected to certain vehicles but works with others.

Vehicle Compatibility / Pilot Level Detection Issue

E19

Charger LEDs show an error; the unit indicates ‘leakage current’ even when no vehicle is connected.

Internal Leakage / GFCI Nuisance Trip

E20

Charger LEDs indicate an error; the unit reports a ‘temperature sensor fault’ or similar (if diagnostic is available).

Temperature Sensor Open/Short

Symptom

Charging is very slow compared to the expected rate; no error codes on the Grizzl-E or vehicle.

Reduced Charging Current / Derating

Symptom

Grizzl-E LEDs behave erratically in very cold weather; the unit may fail to start charging until warmed.

Cold Temperature Performance Issue

Symptom

Grizzl-E LEDs flicker or dim when large household loads turn on or off.

Supply Voltage Fluctuation / Line Sag

Symptom

Grizzl-E LEDs show a ready state, but the vehicle reports 'Charging delayed' or does not start until later.

Perceived Charger Fault Due to Vehicle Scheduled Charging

Symptom

Grizzl-E cable insulation cracked or split, especially near the handle or at the strain relief.

Mechanical Cable Damage

Symptom

Grizzl-E charger completely dead; no LEDs, no response when the breaker is ON.

No Power / Dead Unit

Symptom

Grizzl-E enclosure cracked or physically damaged (e.g., impact from a vehicle or object).

Enclosure Integrity Compromised

Symptom

Grizzl-E enclosure or cable emits a burning smell during or after charging.

Overheating Component / Insulation Breakdown

Symptom

Grizzl-E enclosure vibrates or rattles noticeably when the contactor engages.

Mechanical Vibration / Loose Mounting

Symptom

Grizzl-E intermittently stops charging without any visible error; charging resumes after unplugging and reconnecting.

Intermittent Connection / Cable or Pilot Interruption

Symptom

The Grizzl-E gets very hot to the touch during charging; it may stop charging intermittently without a code.

Overheating Enclosure / Thermal Stress

Symptom

The Grizzl-E makes loud buzzing or chattering noises during charging.

Noisy Contactor / Coil Hum

Symptom

The J1772 handle becomes unusually warm or hot during charging.

Overheating Connector / High Contact Resistance

Symptom

The breaker feeding the Grizzl-E trips during or shortly after starting a charge session.

Overcurrent / Branch Circuit Overload

Symptom

User receives a mild shock or tingling when touching the vehicle or Grizzl-E during or after charging.

Stray Voltage / Grounding Issue

Symptom

Vehicle charge port or Grizzl-E connector shows signs of melting or burning.

Thermal Damage at Connector Interface

Symptom

Vehicle does not start charging; Grizzl-E LEDs show a normal ready state; no error code.

No Charge / EV Not Detecting EVSE

Symptom

Water or condensation visible inside the Grizzl-E enclosure; intermittent charging issues.

Water Ingress / Moisture Contamination