Mitsubishi Electric · Air Conditioning
This fault indicates a hardware error within the transmission processor of a Lossnay unit. Check the communication wiring and the unit's board.
Click steps to track your progress.
Inspect the communication wiring for damage or loose connections.
Check the connections on the Lossnay board.
Ensure there is no excessive electrical noise near the communication lines.
Consider a possible fault with the Lossnay board itself.