20
- fault messages
In the event of fault, the display panel on the QAA73 shows the flashing symbol . Press the
information key ( ) to display the error code and a description of the fault.
Code
Display
Fault description
10
Outside Sens
External probe sensor fault or parameter 75 has been deactivated
20
Boiler Sensor
NTC delivery sensor fault
50
DHW Sensor
DHW NTC sensor fault
60
Room Sensor
QAA73 fault
110
STL boiler
Safety or flue thermostat tripping
132
Safty Shutwn
Floor thermostat tripping
133
No flame
Gas is low
135
-
No electricity supply to the fan
151
BMU
Error in boiler board. Shut off electric power to boiler for 10 seconds
153
Interlock
The RESET button has been pressed for no reason
160
Fan speed
Fan speed threshold not reached
164
HE Flow/Press
No permissive water differential pressure switch
Line no.
70
72
74
75
77
78
79
80
82
90
91
Default value
15
85
Light
On HC1
On
0
0
—.-
70
10 or 35
24 h/day
Range
2.5…40
25…85
Light, Heavy
on HC1
on HC2
on HC1+HC2
nil
On - off
0…360 min
0…360 min
2.5…40
—.- = not active
25…85
10 or 35…58
24 h/day
TSP HC-1h
TSP HC
TSP DHW
Parameter
HC1 gradient
Selection of central heating circuit temperature curve “kt”
HC1 max. output
Central heating system maximum output temperature
Type of building
Room compensation
Activation/deactivation of the influence of the room
temperature. If it is deactivated, the outdoor temperature
sensor must be installed.
Automatic adaptation of the temperature curve “kt” in
relation to the room temperature.
Opt Start Max
Maximum time the boiler is switched on ahead of the timed
program to optimise the temperature in the premises.
Opt Stop Max
Maximum time the boiler is switched off ahead of the timed
program to optimise the temperature in the premises.
HC2 gradient
Selection of temperature curve “kt” of the HC2 central
heating circuit of the low temperature zone if the SIEMENS
AGU2.500 accessory is used.
HC2 max. outputMax
output temperature of the low temperature central heating
system HC2
DHW Red Setp
Minimum temperature of the domestic domestic hot water
DHW program
Selection of the type of timed program for domestic hot
water.
24 h/day
= always on
PROG HC-1h
= as HC1 central heating program less
one hour
PROG HC
= as central heating program
PROG ACS
= specific domestic hot water program
(see also program lines 30-36)
