Upper lamp blinking four times — Indoor control system memory error

Was bedeutet Upper lamp blinks 4-time blink 2.5-second OFF ?

The system cannot properly read data from the non-volatile memory of the indoor electronic control P.C. board. The unit will not operate.

• Corrupted data in indoor control board memory
• Faulty indoor electronic control P.C. board

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Replace the indoor electronic control P.C. board.

2. 2

   Ensure the unit's power supply is stable.