Inverter Overvoltage

What does E47 mean?

The inverter has detected an overvoltage condition, which could be due to an unstable power supply or a malfunction within the inverter itself. This protects the inverter components from damage.

• Excessive voltage on the DC bus, possibly due to regenerative braking without a load.
• Incorrect DC bus filtering or smoothing capacitor failure.
• External power supply voltage exceeding inverter limits.

Click steps to track your progress.

1. 1

   Measure the input AC voltage to the outdoor unit and verify it is within the specified operating range.

2. 2

   Check the DC bus voltage within the inverter (if accessible and safe to do so) to confirm the overvoltage condition.

3. 3

   Inspect the power supply wiring and connections for stability, looking for loose terminals or intermittent contacts.