E1 02 (FJM Outdoor) — Outdoor unit communication error (abnormal data from indoor unit)

What does E1 02 mean?

The FJM outdoor unit displays E1 02, indicating that it has received abnormal communication data from an indoor unit more than 60 times. This suggests a persistent communication issue from an indoor component.

• Loose or faulty electrical communication cable connection
• Incorrect communication settings on an indoor unit
• Faulty indoor unit main PCB sending corrupted data

Click steps to track your progress.

1. 1

   Turn off the main power to the FJM outdoor unit and all connected indoor units at the circuit breaker.

2. 2

   Check all electrical connections for the communication cable between the FJM outdoor unit and each indoor unit.

3. 3

   Ensure communication settings are correct for all indoor units.

4. 4

   Restore power. If the problem continues, there might be a fault with a specific indoor unit or its communication circuit; contact a technician.