E30 - Indoor/outdoor unit connected error

What does E30 mean?

There is an error related to the connection between the indoor and outdoor units. This indicates a problem in the communication or wiring that links these two main components.

• Loose communication wiring between indoor and outdoor units.
• Incorrect wiring connections.
• Faulty control board in either unit.

Click steps to track your progress.

1. 1

   Turn off the main power to the entire air conditioning system at the circuit breaker.

2. 2

   Wait for at least 30 seconds for the system to discharge.

3. 3

   Restore power and observe if the error clears.

4. 4

   If the error remains, a professional inspection of the wiring and control boards is necessary.