H12 — Indoor/Outdoor capacity unmatched

What does H12 mean?

The capacity of the connected indoor and outdoor units do not match the system's specifications. This issue is detected approximately 90 seconds after power is supplied.

• Incorrect indoor/outdoor unit combination.
• Faulty indoor/outdoor connection wire.
• Defective indoor or outdoor PCB (Printed Circuit Board).

Click steps to track your progress.

1. 1

   Refer to your product catalogue to ensure that the installed indoor and outdoor units are a compatible pair.

2. 2

   Inspect the wiring connections between the indoor and outdoor units for any signs of looseness, damage, or incorrect installation.

3. 3

   If the issue persists, contact a qualified technician to inspect the Indoor/Outdoor PCBs.