Operation Manual

8.7. Air filter
Clean the air duct every month as this influences heating performance! If the filter has
been mounted directly into air inlet (i.e. air inlet is not connected to air duct), dismounting and cleaning of the
filter can be performed in the following way: the air inlet closing ring has to be turned counter-clockwise, the
filter must be removed and perfectly cleaned and then it must be put back to its place.
8.8. Shutdowns not caused by errors
a) 3-minutes protection
When the appliance is under power, one must wait 3 minutes to protect the compressor at immediate
start-up after shutdown.
b) If the appliance launches a self-protection mechanism and then shuts down, please check the
following:
When the power indicator lights up, it may happen that the appliance does not fulfil all the conditions for
system start up when being switched on. One should also check that air inlet or air outlet are not blocked or no
strong draught reaches the air outlet.
c) Defreezing
The evaporator may freeze in a wet and cold environment, so it can reduce water heating performance. This
time, the appliance is set to stop water heating, changes to defreezing and starts water heating only then.
During defreezing, the fan stops, the four-direction valve turns the way of flow and the compressor is
operating continuously.
Defreezing may range from 3 minutes to 10 minutes, depending on the external environment and the frost.
d) Temperature display
When the appliance stops, temperature decrease due to heat release is quite normal. The system is started
automatically after falling back to a certain heat degree.
During water heating, the indicated water temperature may decrease for a while or it can not increase due to
heat exchange of the water. When the tank has fully reached the pre-set temperature, the appliance stops
automatically.
8.9 Errors and solutions
Malfunctioning Reason Solutions
The outlet water is
cold. The display is
dark.
Check whether power supply exists
Outlet water is set an a low temperature;
Outlet water temperature
controller is damaged; Circuit board of
indicating indicator is damaged;
Set outlet water at a higher
temperature;
Contact the technician.
No hot water from the
outlet.
Tap water has been cut away;
Water pressure is too low; Inlet valve has
been closed.
It will return to normal after water
supplied; Use it when the pressure is
higher; Open the inlet water valve.
Water leakage The joints on the pipeline are
not sealed well.
Check and reseal all the joints.
8.10 Self-protective mechanisms of the appliance
a) In case of self-protection, the appliance shuts down, starts auto-check and re-starts when the
defensive mechanisms are put into operation.
b) During the launch of self-protection, the buzzer will buzz every other minute and the ALARM
indicator will glitter fast, the error code and water temperature are displayed at one after the other. Press
CANCEL for 3 seconds to stop the alarm. The self-protection mechanisms solve the error and the error
code disappears from the display.
c) The appliance shall launch its self-protective mechanisms among the following circumstances:
c.1) Air inlet or air outlet is blocked;
c.2) The evaporator is covered by too much dust;
c.3) The power source is inadequate (it exceeds the voltage range of 230V )
REMARK
In case of self-protection of the appliance, it has to be disconnected from the electrical power system
manually and restarted after solving the error.
EN 37