Error SC1 — System communication error

What does SC1 mean?

The indoor unit of your Mitsubishi Electric MSZ-AY Air Conditioner displays error code SC1. This typically signifies a problem with communication within the air conditioning system, potentially between the indoor and outdoor units or internal components.

• Interruption in communication wiring or signals.
• Malfunction of a communication board.
• Temporary system anomaly requiring a reboot.

Click steps to track your progress.

1. 1

   Turn off the air conditioner using the remote control.

2. 2

   Shut off the main power supply to the unit at the circuit breaker for at least 30 seconds.

3. 3

   Restore power and try to operate the air conditioner again.