Regular Checks
Check
of Operating
Mode
In the event of an alarm, The background light of LCD will flash and an alarm message will be displayed.
Check the alarm indicator regularly to make sure that the heat pump works properly. You would not always notice if
there is something wrong, as the auxiliary heater would start automatically (provided, of course, operating mode
AUTO was selected). For more information, please refer to the chapter ALARM MESSAGES
on p. 44.
Checking
the
Water
Level
of
the
Heating
System
The pressure of the heating system should be checked once monthly. The pressure, shown on the external pressure
gauge, should be 1-1,5 bar. If the value is below 0.8 bar with cold water in the heating system, more water must be
added (applies to a closed expansion vessel). To find out where the pressure gauge is located.
You can use ordinary tap water for filling the heating system. In some rare cases the water quality would be
unsuitable for this purpose (corrosive or calcareous water). In case of doubt, we would recommend that you call
your installation contractor.
Don’t use any water treatment additives for the heating system!
Checking the Safety
Valves
Both safety valves of the heating system should be checked at least four times a year to prevent lime deposits to
clog the mechanism. To find out where the safety valves are located.
The safety valve of the water heater protects the closed heater against positive pressure. It is fitted on the cold
water inlet line, its outlet opening facing down- wards. If the safety valve is not checked regularly, the water heater
might be damaged. It is quite normal that the safety valve lets out small amounts of water when the water heater is
being charged, especially if a lot of warm water was used previously.
To check the safety valves, give the cap a quarter of a turn clockwise until the valve lets out some water through
the overflow pipe.
If a safety valve does not work properly, it must be replaced. Check with your installation contractor.
The opening pressure of the safety valve is not adjustable.
In
the Event
of
Leakage
In the event of leakage in the warm water lines between unit and water taps, the shut-off valve on the cold water
inlet line should be closed immediately.
Call
your
installation
contractor
. In the event of leakage in the system circuit, turn off the heat pump and
call your installation contractor immediately.
ALARM
OR AND OVER
WATER FLOW TROUBLE
43
Control
