Fujitsu WATERSTAGE 112 Maintenance Document page 38

Heat Pump, Split System, Single Service, 3 phase
Clear 15: Current trip (permanent stoppage)
Hydraulic Unit LED: Green 9 flashes / Red 4 flashes
Outdoor Unit LED: 13 flashes
Probable causes:
•
Connection failure.
•
Outdoor Heat Exchanger clogged.
•
Outdoor Fan operation failure.
•
Compressor failure.
•
Inverter PCB 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 Outdoor Heat Exchanger:
- Is there any obstructing the air flow route?
- Is there any clogging of outdoor unit Heat Exchanger?
If clogged, clear the clog.
3. Check Outdoor Fan:
- Check Outdoor Fan Motor. (Refer to Clear 18)
If the Fan Motor is failure, replace it.
4. Check Compressor:
Refer to "Service parts information 2 : Inverter compressor
If it is abnormal, replace compressor.
5. Replace Inverter PCB:
If Check Point 1 ~ 4 do not improve the symptom, replace Inverter PCB.
38
OK
OK
OK
OK
Maintenance Document 1394-1