Fujitsu WATERSTAGE 112 Maintenance Document page 39

Heat Pump, Split System, Single Service, 3 phase
Clear 17: Compressor startup error (permanent stoppage)
Hydraulic Unit LED: Green 9 flashes / Red 5 flashes
Outdoor Unit LED: 15 flashes
Probable causes:
•
Misconnection of the various electrical components.
•
Inverter PCB failure.
•
Compressor failure.
Check:
1. Check connections condition 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. Check Compressor:
Refer to "Service parts information 2 : Inverter compressor
If it is abnormal, replace compressor.
3. Replace the electronic board :
- If steps 1 and 2 do not solve the problem, replace Inverter PCB.
Maintenance Document 1394-1
OK
OK
39