Indoor/Outdoor Unit Connection Error

Was bedeutet E30 ?

There is an error in the physical or communication connection between the indoor and outdoor units. This prevents proper system operation, as commands and status updates cannot be exchanged.

• Break in the communication wiring between indoor and outdoor units.
• Loose or corroded connection terminals.
• Incorrect polarity of communication wires.
• Faulty communication interface on either unit.

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1. 1

   Inspect the communication wiring terminals on both indoor and outdoor unit PCBs for secure connections and proper seating.

2. 2

   Check for correct polarity of communication wiring (e.g., A/B or +/- terminals, as applicable).

3. 3

   Verify that the total communication line length does not exceed specified installation limits.