E43 - Maximum number of indoor units connected exceeded

What does E43 mean?

The maximum number of indoor units allowed for connection to one outdoor unit has been exceeded. This is an installation configuration error.

• More indoor units connected than the system capacity allows.
• Incorrect wiring configuration during installation.

Click steps to track your progress.

1. 1

   Turn off the entire air conditioning system at the main power breaker.

2. 2

   If you are an installer, verify the number of connected indoor units against the outdoor unit's specifications.

3. 3

   Reconfigure the system to match the allowed number of units.

4. 4

   If unable to resolve, contact a qualified installer or service technician.