H12 — Mismatch of total indoor unit capacity to outdoor unit

What does H12 mean?

The combined capacity of the indoor units does not match the capacity of the outdoor unit. This is an installation or configuration error.

• Incorrect indoor unit capacity selected during installation.
• Outdoor unit is not compatible with the indoor units.
• System configuration error.

Click steps to track your progress.

1. 1

   Verify the specifications of all indoor and outdoor units.

2. 2

   Ensure the total capacity of indoor units does not exceed the outdoor unit's capacity.

3. 3

   Consult the installation manual for compatibility requirements.

4. 4

   Turn off the unit, unplug it, wait 30 seconds, and plug it back in to reset.