Fujitsu WATERSTAGE 112 Maintenance Document page 50

Heat Pump, Split System, Single Service, 3 phase
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
50
1. The unit provides heating or cooling
No
Check the wiring of the cooling kit
control wire
Yes
Is the cooling kit
connected ?
Maintenance Document 1394-1