Remote control does not operate the unit; unit works from front panel.

Safety: No internal high‑voltage work is needed for basic checks; unplug only if opening the unit.

• Replace batteries: Install fresh, correctly oriented batteries in the remote.
• Line of sight: Ensure there is a clear path between the remote and the IR receiver window on the unit.
• Test remote: Point the remote at a smartphone camera and press buttons; you should see the IR LED flash on the screen. If not, replace the remote control.
• Inspect IR window: Clean the IR receiver window on the unit with a soft cloth.
• Receiver check: If the remote is transmitting but the unit does not respond, the IR receiver module on the display board may be faulty. Replace the display/control board or IR receiver as designed.