Indoor/Outdoor Unit Connected Error

What does E30 mean?

This error indicates a problem with the connection or communication between the indoor and outdoor units. It prevents proper system operation and coordination.

• Wiring between indoor and outdoor units is incorrect or incomplete.
• Indoor and outdoor units are not properly communicating.
• Unit addresses set incorrectly for indoor/outdoor pairing.
• Incorrect refrigerant piping connection.
• Power wiring to outdoor unit is faulty.

Click steps to track your progress.

1. 1

   Check the communication wiring between the indoor and outdoor units for secure connections at all terminals.

2. 2

   Verify the continuity of the communication wiring using a multimeter.

3. 3

   Ensure stable power supply to both indoor and outdoor units, checking voltage levels at main terminals.