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Water flow detection
The heat pump only operates whenever there is water flow circulating inside. All models are equipped with a water flow
switch that detects if the water pump is working or not.
“flow” LED lighting = water pump working.
“flow” LED not lighting = water pump stopped.
Internal parameters
Button serves to check the internal parameters. These parameters may only be modified by professionals.
When the machine is displaying internal parameters, the icon will be shown.
Controller state table
Screen Explanation Check Solution (if no reset)
St-by Stand-by - -
FLO
No water flow or the flow switch
doesn’t detect the water flow
- Check if filtration pump is
working.
- Check by-pass setting.
- Check water flow switch position.
Contact your seller
AL10 / AL11 HP error
AL15 / AL16
Too much temperature difference
between water in and water out.
AL18 Comp. Out temp. Too high
AL17
Low temp protection in cooling
mode
AL7 / AL8 Communication error
Check electrical connection
between controller and electronic
card inside the machine.
AL3 Probe error (Water in)
Check probe connection.
AL4 Probe error (Water out)
AL5 Probe error (coil.)
AL1 Probe error (comp. out)
AL2 Probe error (comp. in)
AL6 Probe error (ambiance)
AL9 Fan error Check fan connection.
AL14 Outdoor temperature too low Outdoor temp is below -15°C
Wait for the outdoor
temperature to increase.
AL19 / AL20 Power supply problem
Ask an electrician specialist to
check power supply.
Contact your seller
AL21 / AL22 / AL23 /
AL24 / AL25
Electronic/overheating protection
Stop the power supply for 5 to 10
minutes, check that air flow is not
blocked, turn ON power supply
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