Error Code 15 — Communication fault between indoor and outdoor unit

Was bedeutet 15 ?

The outdoor unit control board cannot communicate with the indoor unit control board for an extended period. This prevents the system from operating.

• Bad communication wiring between units
• Loose connections on terminal blocks
• Faulty PCB on either unit
• Incomplete or inadequate ground connection

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Ensure the communication cable connections at the terminal blocks are tight and correct.

2. 2

   Verify that the communication cable (14/4 stranded copper) is properly connected to the correct terminals.

3. 3

   Check that there are no splices in the communication wire.

4. 4

   Ensure PCB connections at CN21 are in good order.

5. 5

   Check the ground connection for completeness and adequacy.