HMI accessory LED indicators

HMI140HMI145HMI150

1. Ready & Waiting States

Situation	HMI LED pattern	Speed	Charging connector light ring	Buzzer	Visual representation
# Idle	Green solid	Steady	Green	None
# Vehicle detected	Green blinking	Slow	Green	None
# Reserved	Yellow solid	Steady	Yellow	None
# Reserved + Vehicle detected	Yellow blinking	Slow	Yellow	None
# Waiting external signal	Yellow solid	Steady	Blue	None
# Authorized no vehicle	Blue blinking	Fast	Green	None

2. Authentication & Interaction

Situation	HMI LED pattern	Speed	Charging connector light ring	Buzzer	Visual representation
# RFID reading	White progress animation	Animated	None	None
# RFID present	None	–	None	Short beep (1x)
# Authenticating	White blinking	Slow	Green	None
# Auth failed	White flicker odd/even	Flicker	Green	Short beep (3x)

3. Charging States

Situation	HMI LED pattern	Speed	Charging connector light ring	Buzzer	Visual representation
# Charging	Blue breathing	Smooth	Blue	None
# EV suspended	Blue blinking	Very slow	Blue	None

4. Maintenance & Configuration Feedback

Situation	HMI LED pattern	Speed	Charging connector light ring	Buzzer	Visual representation
# TAG added OK	Blue solid	Steady	None	Long beep (1x)
# TAG added failure	None	–	None	Short beep (3x)
# Contactor first closed	None	–	None	Long beep (1x)

5. Fault & Unavailable States

Situation	HMI LED pattern	Speed	Charging connector light ring	Buzzer	Visual representation
# Unavailable	Red solid	Steady	Red	None
# Continuous error	Red blinking	Slow	Red	None
# Error	Red blinking fast	Fast	Red	None

6. Cheat sheet

Color	Meaning	Visual representation
# Green	Indicates ready or idle conditions.
# Blue	Indicates authorized or active charging states.
# Yellow	Indicates waiting or reservation-related conditions.
# Red	Indicates fault or unavailable conditions. Charging is not possible and operator or service intervention may be required.
# Buzzer	Used only for confirmations or failures. If red is shown (steady or blinking), charging is not possible and operator or service intervention may be required.