Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products QAA75.. / QAA78… / AVS37.. 23. August 2007
Presence button
If you do not use the rooms for a certain period of time, you can
press the presence button to reduce the room temperature, thus
saving heating energy.
When the rooms are occupied again, press again the presence
button to resume heating operation.
Heating to Comfort setpoint
Heating to Reduced setpoint
• The presence button is only active in automatic operation
• The current selection is active until the next switching action according to the heating
program takes place
Displaying information
Various data can be displayed by pressing the info button.
0
4 8 12 16 20 24
AUTO
2359Z140
Room temperature
Depending on the type of unit, configuration and operating state, some of the info lines
listed below may not appear.
Display:
− Possible error messages from the error code list on page 151
− Possible service messages from the maintenance code list on page 152
− Possible special mode messages from page 152
Other displays:
− Room temperature. − State of DHW
− Room temperature minimum
− State of boiler
− Room temperature maximum − State of solar
− Boiler temp − State solid fuel boiler
− Outside temperature − State buffer storage tank
− Outside temp min − State swimming pool
− Outside temp max − Date and time of day
− DHW temp 1 − Telephone customer service
− State of heating circuit 1
− State of heating circuit 2
− State heating circuit P
In exceptional cases, the basic display shows one of the following symbols:
Error messages
If this symbol appears, an error in the
plant has occurred. Press the info button
and read further information.
Text3 Text4
0
4 8 12 16 20 24
AUTO
2359Z140
30:Flow sensor 1
Error
Maintenance or special operation
If this symbol appears, a maintenance
alarm is delivered or the plant has
changed to special mode. Press the info
button and read further information.
Text3 Text4
0
4 8 12 16 20 24
AUTO
2359Z140
30:Flow sensor 1
Error
Possible displays
Exception