E2 02 (FJM Outdoor) — Communication error between the outdoor and indoor unit

What does E2 02 mean?

The FJM outdoor unit displays E2 02, indicating a general communication failure between the outdoor unit and one or more indoor units. This prevents the system from functioning as intended.

• Loose or faulty electrical communication wiring
• Incorrect communication settings on the units
• Faulty outdoor or indoor PCB

Click steps to track your progress.

1. 1

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

2. 2

   Carefully check all electrical connections for the communication wiring between the outdoor and indoor units.

3. 3

   Ensure that the communication settings are correctly configured on all units as per the installation manual.

4. 4

   Restore power and attempt to restart the system. If the error persists, contact a qualified technician.