Connector becomes Unavailable after SuspendEV

How it presents

Symptom

Connector becomes Unavailable after SuspendEV — vehicle paused, then charger never returns to Available for the next driver. protocol field note: keep evidence scrubbed and prove the ranked cause before module RMA on OCPP-F07.

Root causes (by observed frequency)

1. #1 Missing StatusNotification transition after SuspendEVSE/EV

   State machine stuck

2. #2 Cable still detected / latch held after session end
3. #3 CSMS never sending remote unlock/availability restore
4. #4 OEM bug requiring connector reset procedure

Diagnostic procedure

1. 1. Capture StatusNotification sequence around SuspendEV

   Expected: Missing Available

   Tools: CSMS

2. 2. Check latch/cable detect physically after unplug

   Expected: Cable free, latch open

   Tools: hands

3. 3. Try UnlockConnector / ChangeAvailability from CSMS

   Expected: Available

   Tools: CSMS

4. 4. Local OEM reset of connector state if documented

   Expected: Returns Available

   Tools: HMI

5. 5. Escalate with sequence log if reproducible every SuspendEV

   Tools: OEM

The fix

Unavailable-after-SuspendEV is state/latch/CSMS restore — clear cable detect before reboots.

1. Confirm the cable truly released before protocol resets.
2. Use UnlockConnector/ChangeAvailability rather than hard reboot first.
3. Apply OEM connector state reset if SuspendEV repeatedly sticks.
4. File OEM ticket with the StatusNotification timeline. Document readings and scrubbed photos for OCPP-F07 before closing the ticket.
5. Validate a suspend → unplug → next-driver start cycle. Document readings and scrubbed photos for OCPP-F07 before closing the ticket.