Error E1 — General system malfunction

What does E1 mean?

The indoor unit displays error code E1, indicating a general operational malfunction within the Mitsubishi Electric MSZ-AY Air Conditioners system. This code usually points to an internal issue that prevents normal operation.

• An internal sensor or component failure.
• Temporary software glitch or communication issue.
• System requiring a power reset to clear the fault.

Click steps to track your progress.

1. 1

   Turn off the air conditioner using the remote controller.

2. 2

   Locate the main circuit breaker for the air conditioner and switch it off for at least 30 seconds.

3. 3

   Turn the circuit breaker back on, then restart the air conditioner to see if the error clears.