Fujitsu Waterstage WS G140DC6 Series Maintenance Document page 33

Split system (Single phase and 3-phase type)
Clear 38: No heat
Probable causes:

Hydraulic Unit error.

Outdoor unit error.

Influence from the outdoor environment.

Misconnections of connectors and cables.

Refrigeration system fault (not enough gas, clogging, dirty filters).
Check:
2. Check the Hydraulic Unit :
- Is the pump operating?
- See if the exchanger is not clogged?
3. Check the outdoor unit:
- Is the fan rotating at high speed?
- Are there any objects blocking the air flow?
- Is the outdoor exchanger clogged?
- Are the valves open?
4. Check the configuration of the room:
- Is the heat pump power suited to the need?
5. Inspect the Hydraulic Unit and outdoor unit installation:
- Check the refrigeration connections (length, diameter)
6. Inspect the refrigeration circuit:
- See if the dehydrator is clogged (there should be no temperature variation
between the dehydrator input and output in normal operating conditions).
- Check the electronic expansion valve
- Check the compressor
Maintenance Document 1544-1
1. The unit provides heating or cooling
No
Check the wiring of the cooling kit
control wire
Yes
Is the cooling kit
connected ?
33