Besenergy
Besenergy 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; display shows E01 immediately after plugging into the vehicle.
Pilot Signal Communication Fault
E02
Charger display shows E02 and refuses to start charging; sometimes trips the breaker when attempting to charge.
Ground Fault / Leakage Current Detected
E03
Display shows E03 and charging stops or will not start; unit may click repeatedly as relays attempt to engage.
Contactor / Relay Welded or Failure to Engage
E04
Charger shows E04 and does not start; sometimes occurs after a lightning storm or power surge.
Input Overvoltage / Surge Protection Triggered
E05
Display shows E05 and charging stops shortly after starting; may occur intermittently.
Overcurrent / Output Overload Protection
E06
Charger shows E06 and refuses to charge; often associated with very low or unstable supply voltage.
Input Undervoltage / Brownout Protection
E07
Display shows E07; charger powers on but will not initiate charging when plugged into vehicle.
Proximity / Lock Detection Fault (Connector Not Properly Seated)
E08
Charger shows E08 and fan runs at high speed or cycles frequently; charging may stop unexpectedly.
Overtemperature Protection (Internal Overheat)
E09
Display shows E09; charger powers on but screen may flicker or reset; charging does not start.
Internal Power Supply Fault
E10
Charger shows E10 and stops charging; may occur when the vehicle requests more current than the charger can provide.
Vehicle Communication / Current Negotiation Error
E11
Display shows E11; charger will not start and may indicate a ground connection problem.
Protective Earth (PE) Loss / Ground Continuity Fault
E12
Charger shows E12; display may indicate "relay check failed" or similar; unit refuses to energize output.
Self-Test / Relay Weld Check Failure
E13
Display shows E13; charger may start then immediately stop charging.
Output Short Circuit / Line-to-Line Fault
E14
Charger shows E14; Wi-Fi or app connection may fail; charging may still work but with limited smart features.
Communication Module Fault (Wi-Fi/Smart Module Error)
E15
Display shows E15; charger may not respond to button presses or app commands.
User Interface / Keypad Fault
E16
Charger shows E16; RFID cards or access control may not work; unit may deny charging even when plugged in.
RFID / Access Control Fault
E17
Charger shows E17; scheduled charging or smart features fail; unit may revert to basic mode.
Real-Time Clock / Timekeeping Fault
E18
Charger shows E18; unit may not detect that the connector has been unplugged or may keep the relay engaged.
Connector Presence / Latch Sensor Fault
E19
Charger shows E19; internal self-test reports insulation resistance error; charging is disabled.
Insulation Resistance / Isolation Fault
E20
Charger shows E20; internal memory or configuration cannot be read; unit may not start.
EEPROM / Configuration Memory Error
Symptom
Charger display is on but very dim or unreadable; charging may still function.
Display Backlight / LCD Failure
Symptom
Charger does not follow scheduled charging times or starts charging immediately instead of waiting.
Schedule / Timer Misconfiguration
Symptom
Charger emits a burning smell or visible smoke during or after a charging session.
Component Overheating / Burnout
Symptom
Charger enclosure becomes very hot to the touch during normal charging.
Excessive Thermal Rise / Cooling Deficiency
Symptom
Charger has no power at all; display is blank and no LEDs are lit even though the breaker is ON.
No AC Input / Dead Unit
Symptom
Charger intermittently stops charging mid-session without any error code; charging resumes if unplugged and replugged.
Intermittent Output Drop / Thermal or Connection Issue
Symptom
Charger leaks water from the enclosure after rain or washing the car nearby.
Water Ingress / Enclosure Seal Failure
Symptom
Charger makes a loud buzzing or humming noise during operation.
Acoustic Noise from Contactor or Transformer
Symptom
Charger powers on and shows ready, but will not start charging when plugged into the vehicle; no error code displayed.
No Charge Start / Pilot Not Recognized
Symptom
Charger randomly reboots or restarts during idle or charging, without showing an error code.
Unstable Internal Power or Firmware Crash
Symptom
Charger trips the upstream breaker as soon as a charging session starts.
Overcurrent / Short on Startup
Symptom
Charger’s enclosure vibrates or rattles when the fan or relay operates.
Loose Mounting or Internal Hardware
Symptom
Charger’s front panel buttons are stuck, hard to press, or do not spring back.
Mechanical Button Wear / Contamination
Symptom
Charger’s internal fan is very loud, rattling, or does not spin.
Cooling Fan Wear or Failure
Symptom
Charger’s output cable insulation is cracked, stiff, or damaged.
Degraded Output Cable Insulation
Symptom
Charger’s RFID card reader sometimes fails to detect cards unless they are swiped multiple times.
Weak RFID Reader Sensitivity
Symptom
Charger’s Wi-Fi or app connection is unstable or frequently drops, but charging continues.
Intermittent Network Connectivity
Symptom
J1772 connector is difficult to insert or remove from the vehicle inlet.
Mechanical Wear or Deformation of Vehicle Connector
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Charger will not start charging; display shows E01 immediately after plugging into the vehicle.
|
Pilot Signal Communication Fault | View Details |
| E02 |
Charger display shows E02 and refuses to start charging; sometimes trips the breaker when attempting to charge.
|
Ground Fault / Leakage Current Detected | View Details |
| E03 |
Display shows E03 and charging stops or will not start; unit may click repeatedly as relays attempt to engage.
|
Contactor / Relay Welded or Failure to Engage | View Details |
| E04 |
Charger shows E04 and does not start; sometimes occurs after a lightning storm or power surge.
|
Input Overvoltage / Surge Protection Triggered | View Details |
| E05 |
Display shows E05 and charging stops shortly after starting; may occur intermittently.
|
Overcurrent / Output Overload Protection | View Details |
| E06 |
Charger shows E06 and refuses to charge; often associated with very low or unstable supply voltage.
|
Input Undervoltage / Brownout Protection | View Details |
| E07 |
Display shows E07; charger powers on but will not initiate charging when plugged into vehicle.
|
Proximity / Lock Detection Fault (Connector Not Properly Seated) | View Details |
| E08 |
Charger shows E08 and fan runs at high speed or cycles frequently; charging may stop unexpectedly.
|
Overtemperature Protection (Internal Overheat) | View Details |
| E09 |
Display shows E09; charger powers on but screen may flicker or reset; charging does not start.
|
Internal Power Supply Fault | View Details |
| E10 |
Charger shows E10 and stops charging; may occur when the vehicle requests more current than the charger can provide.
|
Vehicle Communication / Current Negotiation Error | View Details |
| E11 |
Display shows E11; charger will not start and may indicate a ground connection problem.
|
Protective Earth (PE) Loss / Ground Continuity Fault | View Details |
| E12 |
Charger shows E12; display may indicate "relay check failed" or similar; unit refuses to energize output.
|
Self-Test / Relay Weld Check Failure | View Details |
| E13 |
Display shows E13; charger may start then immediately stop charging.
|
Output Short Circuit / Line-to-Line Fault | View Details |
| E14 |
Charger shows E14; Wi-Fi or app connection may fail; charging may still work but with limited smart features.
|
Communication Module Fault (Wi-Fi/Smart Module Error) | View Details |
| E15 |
Display shows E15; charger may not respond to button presses or app commands.
|
User Interface / Keypad Fault | View Details |
| E16 |
Charger shows E16; RFID cards or access control may not work; unit may deny charging even when plugged in.
|
RFID / Access Control Fault | View Details |
| E17 |
Charger shows E17; scheduled charging or smart features fail; unit may revert to basic mode.
|
Real-Time Clock / Timekeeping Fault | View Details |
| E18 |
Charger shows E18; unit may not detect that the connector has been unplugged or may keep the relay engaged.
|
Connector Presence / Latch Sensor Fault | View Details |
| E19 |
Charger shows E19; internal self-test reports insulation resistance error; charging is disabled.
|
Insulation Resistance / Isolation Fault | View Details |
| E20 |
Charger shows E20; internal memory or configuration cannot be read; unit may not start.
|
EEPROM / Configuration Memory Error | View Details |
| – |
Charger display is on but very dim or unreadable; charging may still function.
|
Display Backlight / LCD Failure | View Details |
| – |
Charger does not follow scheduled charging times or starts charging immediately instead of waiting.
|
Schedule / Timer Misconfiguration | View Details |
| – |
Charger emits a burning smell or visible smoke during or after a charging session.
|
Component Overheating / Burnout | View Details |
| – |
Charger enclosure becomes very hot to the touch during normal charging.
|
Excessive Thermal Rise / Cooling Deficiency | View Details |
| – |
Charger has no power at all; display is blank and no LEDs are lit even though the breaker is ON.
|
No AC Input / Dead Unit | View Details |
| – |
Charger intermittently stops charging mid-session without any error code; charging resumes if unplugged and replugged.
|
Intermittent Output Drop / Thermal or Connection Issue | View Details |
| – |
Charger leaks water from the enclosure after rain or washing the car nearby.
|
Water Ingress / Enclosure Seal Failure | View Details |
| – |
Charger makes a loud buzzing or humming noise during operation.
|
Acoustic Noise from Contactor or Transformer | View Details |
| – |
Charger powers on and shows ready, but will not start charging when plugged into the vehicle; no error code displayed.
|
No Charge Start / Pilot Not Recognized | View Details |
| – |
Charger randomly reboots or restarts during idle or charging, without showing an error code.
|
Unstable Internal Power or Firmware Crash | View Details |
| – |
Charger trips the upstream breaker as soon as a charging session starts.
|
Overcurrent / Short on Startup | View Details |
| – |
Charger’s enclosure vibrates or rattles when the fan or relay operates.
|
Loose Mounting or Internal Hardware | View Details |
| – |
Charger’s front panel buttons are stuck, hard to press, or do not spring back.
|
Mechanical Button Wear / Contamination | View Details |
| – |
Charger’s internal fan is very loud, rattling, or does not spin.
|
Cooling Fan Wear or Failure | View Details |
| – |
Charger’s output cable insulation is cracked, stiff, or damaged.
|
Degraded Output Cable Insulation | View Details |
| – |
Charger’s RFID card reader sometimes fails to detect cards unless they are swiped multiple times.
|
Weak RFID Reader Sensitivity | View Details |
| – |
Charger’s Wi-Fi or app connection is unstable or frequently drops, but charging continues.
|
Intermittent Network Connectivity | View Details |
| – |
J1772 connector is difficult to insert or remove from the vehicle inlet.
|
Mechanical Wear or Deformation of Vehicle Connector | View Details |
No matching codes found
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