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Red 8 Flashes, Green 4 Flashes

Red 8 Flashes, Green 4 Flashes (Single System) — PFC Circuit Error

Fujitsu · Air Conditioners

What does Red 8 Flashes, Green 4 Flashes mean?

The red LED flashes eight times and the green LED flashes four times on the indoor unit. This indicates an error in the Power Factor Correction (PFC) circuit, which helps ensure efficient power usage.

Common Causes

  • Malfunction of the PFC circuit components.
  • Power supply irregularities affecting the PFC operation.
  • Overload or short circuit condition within the power electronics.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner at the circuit breaker for at least 30 seconds.

  2. 2

    Check for any other appliances drawing excessive power on the same circuit.

  3. 3

    Restore power and attempt to operate the unit.

  4. 4

    A persistent PFC circuit error requires inspection and repair by a qualified electrical or HVAC technician.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

AFM Filter Error (AUY, ABY & AWY)Red Blinks, Green 12 Pulses, Yellow Off (AUY, ABY & AWY) — Active Filter Module ErrorAir Sensor Closed (AUY, ABY & AWY)Red 2 Pulses, Green Blinks, Yellow Blinks (AUY, ABY & AWY) — Air Sensor Closed Circuit (Short)Air Sensor Open (AUY, ABY & AWY)Red 2 Pulses, Green Blinks, Yellow Off (AUY, ABY & AWY) — Air Sensor Open Circuit
Source: Fujitsu Air Conditioners
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