E1 n 86 (FJM Indoor) — MPI error malfunction

What does E1 n 86 mean?

The FJM indoor unit displays E1 n 86, indicating a malfunction with the MPI (Multi-Purpose Inverter) component within the indoor unit. This component is crucial for motor control and efficiency.

• Faulty MPI component on the indoor PCB
• Internal electrical fault within the MPI circuit

Click steps to track your progress.

1. 1

   Turn off the power to the FJM indoor unit at the circuit breaker for 5 minutes.

2. 2

   Restore power and attempt to restart the system.

3. 3

   This error typically indicates a component failure within the indoor unit's electronics.

4. 4

   Contact a qualified technician to inspect the MPI and the indoor PCB.