Fujitsu WATERSTAGE 112 Maintenance Document page 46

Heat Pump, Split System, Single Service, 3 phase
Clear 27: P.F.C. error
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.
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OK
OK
Maintenance Document 1394-1