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Water flow detection
The heat pump always runs when water flows through it. All models are equipped with a water flow switch that detects
whether the water pump is running or not.
"Flow" LED is on = water pump is running.
Flow LED off = water pump is off.
Internal parameters
The button is used to check the internal parameters. These parameters may only be changed by qualified
persons.
When the device displays internal parameters, the icon will appear on the display
.
Error codes and solutions
Screen
Explanation
Control
Solution (except restart)
St-by
Standby mode
-
-
FLO
No water flow or the flow switch
has not detected water flow
- Check that the filter pump is
running.
- Check the bypass setting.
- Check the setting of the water
flow switch.
Contact the supplier
AL10 / AL11
Heat pump error
AL15 / AL16
Temperature difference between
water inlet and outlet too great.
AL18
Compressor outlet temperature
difference too high
AL17
Low temperature protection in
cooling mode
AL7 / AL8
Communication error
Check the electrical connection
between the controller and the
electronic board in the device.
AL3
Probe error (water inlet)
Check probe connection
AL4
Probe error (water outlet)
AL5
Probe error (coil)
AL1
Probe fault (compressor output)
AL2
Probe fault (compressor input)
AL6
Probe error (environment)
AL9
Fan error
Check fan connection.
AL14
Ambient temperature too low
Ambient temperature below -15° C
Wait until the ambient
temperature rises.
AL19 / AL20
The problem with the electric
power
Have an electrician check the
power supply.
Contact the supplier
AL21 / AL22 / AL23 /
AL24 / AL25
Electronic / overheating protection
Turn the power OFF for 5 to 10
minutes, then check that the
water flow is not obstructed, and
then turn the power back on.
EN
