E4 69 (FJM Outdoor) — DC link Voltage sensor error

What does E4 69 mean?

The FJM outdoor unit displays E4 69 when the DC link voltage sensor, which monitors critical voltage levels in the inverter circuit, is faulty. This can impact the stability and control of the compressor.

• Faulty DC link voltage sensor
• Issue with the outdoor inverter PBA (Printed Board Assembly)

Click steps to track your progress.

1. 1

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

2. 2

   Restore power and attempt to restart the system.

3. 3

   This error usually indicates a component fault within the inverter system that requires specialized diagnostic tools.

4. 4

   Contact a qualified technician to inspect the DC link voltage sensor or the outdoor inverter PBA.