Charger enclosure vibrates or rattles noticeably when charging at high current.

Safety first: Turn off the charger at the consumer unit before tightening any mounting hardware.

User steps:

• Check that the Andersen unit is firmly fixed to the wall; gently try to move it. If it moves, do not overtighten yourself unless you are confident and the fixings are accessible.
• Inspect visible external screws and tighten gently with the correct screwdriver while the unit is isolated.

For a technician:

• Remove the front cover and verify that the backplate is securely anchored to the wall with appropriate fixings.
• Check that the main control PCB, contactor, and terminal blocks are firmly secured to the backplate.
• Adjust cable routing and strain relief to reduce vibration transfer.