Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document page 22

Split system single phase type
Clear 21: active filter error (only for WO*A080LDC and WO*A100LDT)
PFC error (only for WO*A060LDC)
Hydraulic Unit LED: Green 6 flashes / Red 4 flashes
Outdoor Unit LED: flash
Probable causes:
Connection failure.
•
•
Active filter module failure (only for WO*A080LDC and WO*A100LDT)
Main PCB failure.
•
Check:
1. Check connections in control unit:
- 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. Replace Active Filter module (only for WO*A080LDC and WO*A100LDT) :
- Check Active Filter module (PARTS INFORMATION 6)
If active vilter is abnormal, replace it.
3. Replace main PCB :
If checkpoint 1~2 does not improve the symptom, change main PCB.
22
OK
OK
Maintenance Document 1589-3