Charger shows E17; app may indicate ‘clock error’, ‘time sync fault’, or ‘scheduling error’. Scheduled charging may not work.

Safety first: This is a low‑risk fault; the charger may still charge manually.

Steps to try:

• Check network time: Ensure the charger has internet access so it can synchronise time via NTP if supported.
• Manually set time: Use the Hager app or web interface to manually set the correct date and time, then reconfigure schedules.
• Update firmware: Install any available firmware updates that may fix RTC or scheduling issues.
• If E17 persists and scheduling is critical: A technician may need to replace the main control board if the RTC hardware or backup battery has failed and cannot be serviced separately.