SERO AWA-SS-10, Инструкция по установке и обслуживанию

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Control 38
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. 40.
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!