ACV HP300 Manuel De Mise En Service, D'opération Et D'entretien page 38

Scale can be removed from the interior part of the tank manually, through the fitting opening. It is
rationale to flush the tank with water ray after scale removal.
8.5. Prevention of frost damages
If temperature may fall below the freezing point in the location of the hot water tank, the heating of the
tank must not be switched off or the tank must be discharged in periods of frost danger.
8.6. In case of indirect heating
OVERHEATING PROTECTION MUST BE PERFORMED BY THE INDIRECT HEATING
8.7. Air filter
Clean the air duct every month as this influences heating performance!
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
The outlet water is
cold. The display is
dark.
No hot water from the
outlet.
Water leakage
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.
EQUIPMENT!
Reason
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;
Tap water has been cut away;
Water pressure is too low; Inlet valve has
been closed.
The joints on the pipeline are
not sealed well.
EN
Solutions
Set outlet water at a higher
temperature;
Contact the technician.
It will return to normal after water
supplied; Use it when the pressure is
higher; Open the inlet water valve.
Check and reseal all the joints.
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If the filter has