Fujitsu Waterstage WS G140DC6 Series Maintenance Document page 27

Split system (Single phase and 3-phase type)
Clear 25: Compressor temperature protection (permanent stoppage)
Hydraulic Unit LED: Green 10 flashes / Red 3 flashes
Outdoor Unit LED: 12 flashes
Probable causes:
Valve is close.

EEV failure.

Gas leak, less.

Compressor Thermistor failure.

Outdoor Fan operation failure.

Outdoor Heat Exchanger clogged.

Check:
Cooling mode
1. Check if gas valve is open:
If it is not open, open it and check the
operation.
2. Check EEV and Strainer:
Are EEV and Strainer open?
If EEV or Strainer is defective, replace it.
3. Check if gas leak or less gas:
Measure gas pressure, if there is a leak, correct it.
If recharging refrigerant, make sure to perform vacuuming and recharge the specified amount.
4. Check compressor temperature Thermistor:
- Is it on the holder?
- Is there a cable pinched?
Check characteristics of thermistor (Refer to Clear 11), If defective, replace the thermistor
5. 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.
OK
6. Check Outdoor Fan:
Check Outdoor Fan Motor. (Refer to Clear 18)
If the Fan Motor is failure, replace it.
Maintenance Document 1544-1
OK
OK
OK
Heating mode
1. Check if liquid valve is open:
If it is not open, open it and check the
operation.
2. Check EEV and Strainer:
Are EEV and Strainer open?
If EEV or Strainer is defective, replace it.
OK
OK
7. Replace Main PCB:
If Check Point 1 ~ 6 do not improve the
symptom, replace Main PCB.
OK
OK
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