Indoor/Outdoor Communication Miswiring/Disconnection

What does E6 mean?

This error indicates a communication problem between indoor and outdoor units, specifically due to incorrect wiring (converse wiring) or a complete disconnection of the communication wire. This prevents the units from exchanging essential control signals, causing system failure.

• Communication wiring between indoor and outdoor units is loose, disconnected, or broken.
• Faulty communication interface board on either the indoor or outdoor unit.
• Excessive noise or interference on the communication line.
• Incorrect wiring gauge or length exceeding specifications.

Click steps to track your progress.

1. 1

   Verify the indoor/outdoor connecting wire terminations match the wiring diagram for correct connection, checking for converse wiring or disconnections.

2. 2

   Inspect the indoor/outdoor connecting wire and power supply for signs of electrical noise interference that could disrupt communication.

3. 3

   Cycle power to the unit (turn off, then on again) to re-check for the error.