JuiceBox
JuiceBox 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 front LEDs indicate E01 immediately after plugging into vehicle.
Pilot Signal Communication Fault
E02
Charging session stops or will not start; display or app shows E02 overcurrent or overload fault.
Output Overcurrent Protection Trip
E03
Charger refuses to energize; app or LEDs show E03 ground fault / GFCI trip.
Ground Fault Circuit Interruption (GFCI) Trip
E04
Charger displays E04 or indicates overvoltage; charging will not start or stops abruptly.
Input Overvoltage Protection Trip
E05
Charger shows E05 undervoltage; charging is slow, intermittent, or will not start.
Input Undervoltage Detection
E06
Charger displays E06 relay or contactor fault; unit clicks repeatedly or not at all when starting a session.
Main Contactor / Relay Welded or Open
E07
Charger shows E07 temperature fault; charging stops or will not start, especially in hot conditions.
Internal Overtemperature Protection
E08
Charger indicates E08 ground continuity or earth fault; unit refuses to charge.
Protective Earth (Ground) Integrity Fault
E09
Charger shows E09 stuck relay or contactor; unit reports energized output when it should be off.
Stuck or Welded Output Relay Detection
E10
Charger displays E10 proximity or latch fault; vehicle does not lock connector or charging will not start.
Proximity Pilot (PP) Circuit Fault
E11
Charger shows E11 pilot duty cycle error; vehicle requests current outside allowed range.
Pilot Duty Cycle / EVSE Current Limit Mismatch
E12
Charger displays E12 internal communication error; LEDs may flash in an unusual pattern and unit is unresponsive.
Internal MCU / Peripheral Communication Fault
E13
Charger shows E13 Wi-Fi module error; local charging may work but app connectivity fails.
Wi-Fi Module Communication Fault
E14
Charger displays E14 Ethernet communication error (for models with Ethernet); remote control features fail.
Ethernet Link / Communication Fault
E15
Charger shows E15 RFID reader error (for RFID-enabled models); cannot start sessions with RFID cards.
RFID Reader Communication Fault
E16
Charger displays E16 load sharing or dynamic load management error when used in a group installation.
Load Sharing Communication Fault
E17
Charger shows E17 time synchronization or RTC error; scheduled charging may not work correctly.
Real-Time Clock / Time Sync Fault
E18
Charger displays E18 vehicle communication error; vehicle may show 'charging station error' on its dash.
EVSE–EV Communication Protocol Fault
E19
Charger shows E19 stuck button or front panel input error; physical start/stop button may not respond.
Front Panel Button / Keypad Fault
E20
Charger displays E20 internal power supply error; LEDs may be dim or flicker, unit may reboot repeatedly.
Low-Voltage Power Supply Fault
Symptom
Charger does not follow scheduled charging times; starts immediately or not at all despite schedule set in app.
Scheduling / Time Control Malfunction
Symptom
Charger emits a burning smell or visible smoke from the enclosure or cable.
Component Overheating / Electrical Burn
Symptom
Charger emits a loud humming or buzzing noise during operation.
Mechanical Vibration / Magnetic Hum
Symptom
Charger intermittently loses RFID card recognition; sometimes cards work, sometimes they are not detected.
Intermittent RFID Reader Performance
Symptom
Charger leaks water or shows condensation inside the enclosure, especially after rain or washing.
Water Ingress / Enclosure Seal Failure
Symptom
Charger makes a rapid clicking sound and repeatedly starts and stops charging.
Contactor Chatter / Unstable Control Voltage
Symptom
Charger or cable becomes excessively hot during normal charging; plastic may feel soft or discolored.
Overheating of Cable or Internal Connections
Symptom
Charger powers on but will not start charging; LEDs show ready, vehicle reports 'charging station not ready' with no specific error code.
EVSE Ready but No Charge Initiation
Symptom
Charger starts charging but stops randomly after a few minutes; no clear error code is shown, or only a brief fault indication.
Intermittent Charging / Nuisance Trip
Symptom
Charger trips the upstream breaker or GFCI immediately when a charging session starts.
Upstream Breaker or GFCI Nuisance Trip
Symptom
Charger will not power on at all; no LEDs, no network connection, completely dead.
No AC Power / Internal Power Loss
Symptom
Charger’s app shows incorrect or wildly fluctuating energy usage or current readings.
Current Sensing / Metering Error
Symptom
Charger’s cable is physically damaged: cuts, exposed conductors, or crushed sections are visible.
Mechanical Damage to Output Cable
Symptom
Charger’s enclosure is cracked, warped, or otherwise physically damaged, but it still appears to function.
Enclosure Structural Damage
Symptom
Charger’s front LEDs are dim, flickering, or not displaying the correct status colors.
LED Indicator / Front Panel Fault
Symptom
Charger’s internal fan (if equipped) is noisy, grinding, or not spinning, and the unit may overheat.
Cooling Fan Failure
Symptom
Charger’s Wi-Fi connection frequently drops; app shows the unit offline intermittently, but local charging continues.
Intermittent Network Connectivity
Symptom
Visible arcing or sparking when plugging in or unplugging the J1772 connector, sometimes accompanied by a popping sound.
Live Plug/Unplug Arcing at Connector
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Charger will not start charging; app or front LEDs indicate E01 immediately after plugging into vehicle.
|
Pilot Signal Communication Fault | View Details |
| E02 |
Charging session stops or will not start; display or app shows E02 overcurrent or overload fault.
|
Output Overcurrent Protection Trip | View Details |
| E03 |
Charger refuses to energize; app or LEDs show E03 ground fault / GFCI trip.
|
Ground Fault Circuit Interruption (GFCI) Trip | View Details |
| E04 |
Charger displays E04 or indicates overvoltage; charging will not start or stops abruptly.
|
Input Overvoltage Protection Trip | View Details |
| E05 |
Charger shows E05 undervoltage; charging is slow, intermittent, or will not start.
|
Input Undervoltage Detection | View Details |
| E06 |
Charger displays E06 relay or contactor fault; unit clicks repeatedly or not at all when starting a session.
|
Main Contactor / Relay Welded or Open | View Details |
| E07 |
Charger shows E07 temperature fault; charging stops or will not start, especially in hot conditions.
|
Internal Overtemperature Protection | View Details |
| E08 |
Charger indicates E08 ground continuity or earth fault; unit refuses to charge.
|
Protective Earth (Ground) Integrity Fault | View Details |
| E09 |
Charger shows E09 stuck relay or contactor; unit reports energized output when it should be off.
|
Stuck or Welded Output Relay Detection | View Details |
| E10 |
Charger displays E10 proximity or latch fault; vehicle does not lock connector or charging will not start.
|
Proximity Pilot (PP) Circuit Fault | View Details |
| E11 |
Charger shows E11 pilot duty cycle error; vehicle requests current outside allowed range.
|
Pilot Duty Cycle / EVSE Current Limit Mismatch | View Details |
| E12 |
Charger displays E12 internal communication error; LEDs may flash in an unusual pattern and unit is unresponsive.
|
Internal MCU / Peripheral Communication Fault | View Details |
| E13 |
Charger shows E13 Wi-Fi module error; local charging may work but app connectivity fails.
|
Wi-Fi Module Communication Fault | View Details |
| E14 |
Charger displays E14 Ethernet communication error (for models with Ethernet); remote control features fail.
|
Ethernet Link / Communication Fault | View Details |
| E15 |
Charger shows E15 RFID reader error (for RFID-enabled models); cannot start sessions with RFID cards.
|
RFID Reader Communication Fault | View Details |
| E16 |
Charger displays E16 load sharing or dynamic load management error when used in a group installation.
|
Load Sharing Communication Fault | View Details |
| E17 |
Charger shows E17 time synchronization or RTC error; scheduled charging may not work correctly.
|
Real-Time Clock / Time Sync Fault | View Details |
| E18 |
Charger displays E18 vehicle communication error; vehicle may show 'charging station error' on its dash.
|
EVSE–EV Communication Protocol Fault | View Details |
| E19 |
Charger shows E19 stuck button or front panel input error; physical start/stop button may not respond.
|
Front Panel Button / Keypad Fault | View Details |
| E20 |
Charger displays E20 internal power supply error; LEDs may be dim or flicker, unit may reboot repeatedly.
|
Low-Voltage Power Supply Fault | View Details |
| – |
Charger does not follow scheduled charging times; starts immediately or not at all despite schedule set in app.
|
Scheduling / Time Control Malfunction | View Details |
| – |
Charger emits a burning smell or visible smoke from the enclosure or cable.
|
Component Overheating / Electrical Burn | View Details |
| – |
Charger emits a loud humming or buzzing noise during operation.
|
Mechanical Vibration / Magnetic Hum | View Details |
| – |
Charger intermittently loses RFID card recognition; sometimes cards work, sometimes they are not detected.
|
Intermittent RFID Reader Performance | View Details |
| – |
Charger leaks water or shows condensation inside the enclosure, especially after rain or washing.
|
Water Ingress / Enclosure Seal Failure | View Details |
| – |
Charger makes a rapid clicking sound and repeatedly starts and stops charging.
|
Contactor Chatter / Unstable Control Voltage | View Details |
| – |
Charger or cable becomes excessively hot during normal charging; plastic may feel soft or discolored.
|
Overheating of Cable or Internal Connections | View Details |
| – |
Charger powers on but will not start charging; LEDs show ready, vehicle reports 'charging station not ready' with no specific error code.
|
EVSE Ready but No Charge Initiation | View Details |
| – |
Charger starts charging but stops randomly after a few minutes; no clear error code is shown, or only a brief fault indication.
|
Intermittent Charging / Nuisance Trip | View Details |
| – |
Charger trips the upstream breaker or GFCI immediately when a charging session starts.
|
Upstream Breaker or GFCI Nuisance Trip | View Details |
| – |
Charger will not power on at all; no LEDs, no network connection, completely dead.
|
No AC Power / Internal Power Loss | View Details |
| – |
Charger’s app shows incorrect or wildly fluctuating energy usage or current readings.
|
Current Sensing / Metering Error | View Details |
| – |
Charger’s cable is physically damaged: cuts, exposed conductors, or crushed sections are visible.
|
Mechanical Damage to Output Cable | View Details |
| – |
Charger’s enclosure is cracked, warped, or otherwise physically damaged, but it still appears to function.
|
Enclosure Structural Damage | View Details |
| – |
Charger’s front LEDs are dim, flickering, or not displaying the correct status colors.
|
LED Indicator / Front Panel Fault | View Details |
| – |
Charger’s internal fan (if equipped) is noisy, grinding, or not spinning, and the unit may overheat.
|
Cooling Fan Failure | View Details |
| – |
Charger’s Wi-Fi connection frequently drops; app shows the unit offline intermittently, but local charging continues.
|
Intermittent Network Connectivity | View Details |
| – |
Visible arcing or sparking when plugging in or unplugging the J1772 connector, sometimes accompanied by a popping sound.
|
Live Plug/Unplug Arcing at Connector | View Details |
No matching codes found
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