E1 n 02 (FJM Indoor) — Communication error (outdoor cannot communicate)

What does E1 n 02 mean?

The FJM indoor unit displays E1 n 02, indicating a communication issue where the outdoor unit is unable to communicate with this specific indoor unit. This can be caused by problems with the indoor unit's board or interference from other units.

• Faulty indoor unit PCB
• Interference from another indoor unit or system component
• Loose communication wiring

Click steps to track your progress.

1. 1

   Turn off the main power to all FJM units (indoor and outdoor) at the circuit breaker for 30 seconds.

2. 2

   Check for any other indoor units that might be displaying errors or operating unusually.

3. 3

   Restore power and attempt to restart the system.

4. 4

   If the problem continues, contact a qualified technician to inspect the specific indoor unit's PCB.