Fujitsu Waterstage WS G140DC6 Series Maintenance Document page 29

Split system (Single phase and 3-phase type)
Clear 27: P.F.C. error (only for 3-phase type)
Hydraulic Unit LED: Green 6 flashes / Red 4 flashes
Outdoor Unit LED: 19 flashes
Probable causes:
Connector connection failure.

Main PCB failure.

PFC PCB failure.

Check:
1. Check connections of between Main PCB and PFC PCB:
- Check if the terminal connection is loose.
- Check if connector is removed.
- Check if connector is erroneous connection.
- Check if cable is open.
Upon correcting the removed connector or mis-wiring, reset the power.
2. Check output voltage of Main PCB :
Check voltage of Main PCB (Measure at Main PCB side connector)
1 pin(brown) - 2 pin(Red) DC5V +/- 5%
If the voltage is not correct, replace Main PCB.
3. Replace PFC PCB
If Check Point 1, 2 do not improve the symptom, replace PFC PCB.
Maintenance Document 1544-1
OK
OK
29