Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document page 18

Split system single phase type
Clear 15: Current trip (permanent stoppage)
Hydraulic Unit LED: Green 9 flashes / Red 4 flashes
Outdoor Unit LED: flash
Probable causes:
Connection failure.
•
Outdoor Heat Exchanger clogged.
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Outdoor Fan operation failure.
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Compressor failure.
•
Main PCB failure.
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Transistor PCB (IPM) (only for WO*A080LDC, WO*A100LDT model)
•
Check:
1. Check connections condition in control unit Check connections condition in control unit Check connections condition in control unit 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: Check Outdoor Fan Check Outdoor Fan
- Check Outdoor Fan Motor. (Refer to Clear 18)
If the Fan Motor is failure, replace it.
4. Check Check transistor PCB (IPM) (only for 080 and 100 model) transistor PCB (IPM) (only for 080 and 100 model) :
Check Check transistor PCB (IPM) (only for 080 and 100 model) transistor PCB (IPM) (only for 080 and 100 model)
- Check IPM. (PARTS INFORMATION 7)
If it is abnormal, replace transistor PCB.
5. Check Main PCB :
If checkpoint 1~4 do not improve the symptom, replace main PCB
6. Replace compressor :
If Check Point 1 ~ 5 do not improve the symptom, replace compressor.
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Maintenance Document 1589-3