E2 01 (FJM Outdoor) — The number of Indoor units mismatched

What does E2 01 mean?

The FJM outdoor unit displays E2 01, indicating that the count of connected indoor units does not match the configuration set for the outdoor unit. This is a system setup discrepancy.

• Incorrect indoor unit count setting (e.g., SW01 switch on outdoor unit)
• Wiring error for indoor unit connections
• Incorrect model combination

Click steps to track your progress.

1. 1

   Verify the actual number of indoor units connected to your FJM system.

2. 2

   Turn off the main power to the system at the circuit breaker.

3. 3

   Check the electrical connections for all indoor units and the outdoor unit for proper wiring.

4. 4

   Consult your installation manual to confirm and adjust the outdoor unit's settings (e.g., SW01 dip switch) for indoor unit quantity. Restore power after adjustment.