33/69
Siemens Building Technologies
Electronic Air / Fuel Ratio Control System
CC1P7873.1en
HVAC Products
10 Display on the control unit
15.10.2002
10 Display on the control unit
Sealing facility
LED
is lit with fuel
selection
«FUEL1»,
flashes in programming
mode
%
1
2
78
73
1
u0
2
e/
12
0
1
R V W 26
Display
88.8
-0.-
-1.-
-2.-
-3.-
-4.-
-5.-
-6.-
-7.-
XX.X
-8.-
-9.-
-XX.
Self-test after power ON
Burner switched off («Standby»)
Fan starts to run, end switch test
Actuators open for prepurging,
fan runs up to maximum speed
Prepurging
Actuators travel to the ignition position
Waiting for fuel valve
Interval
Actuators travel to minimum output
Burner in operation (burner output in %)
Fuel valve closed, postpurging
Actuators close
Fault code in the event of fault (flashing)
Meaning
LED
is lit with fuel
selection
«FUEL2»
,
flashes in programming
mode
3-digit display (LED)