Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document page 19

Split system single phase type
Clear 16: Current sensor error
Hydraulic Unit LED: Green 8 flashes / Red 4 flashes
Outdoor Unit LED: flash
Probable causes:
Defective connection of electric components.
•
External cause.
•
Main PCB failure.
•
Check:
1-1. Reset power supply and operate Reset power supply and operate :
Reset power supply and operate Reset power supply and operate
Does error indication show again ?
2. Check connections of outdoor unit electrical
components :
- Check if the terminal connection is loose.
- Check if connector is removed
- Check erroneous connection
- Check if cable is open.
Upon correcting the removed connector or
mis-wiring, reset the power.
3. Replace main PCB :
If checkpoints 1 and 2 do not improve the symptom, change main PCB
Maintenance Document 1589-3
NO
YES
OK
1-2. Check external cause at indoor and outdoor Check external cause at indoor and outdoor
Check external cause at indoor and outdoor Check external cause at indoor and outdoor
(vol (voltage drop or noise) (vol (vol tage drop or noise) : tage drop or noise) tage drop or noise)
•
Instant drop
Check if there is a large load electric
apparatus in the same circuit.
•
Momentary power failure
Check if there is a defective contact or leak
current in the power supply circuit.
•
Noise
- Check if there is any equipment causing
harmonic wave near electric line.
(Neon bulb or electric equipment that
may cause harmonic wave)
- Check the complete insulation of
grounding.
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