22
Press the following keys:
1.
d
+
å
simultaneously for
approx. 4 s.
The
"Service"
menu is
displayed.
2.
|
/
~
for
"Diagnosis"
.
3.
d
to confirm.
4.
|
/
~
for the required parame-
ter.
5.
g
until the default display appears.
This terminates the diagnosis.
The Diagnosis menu is subdivided into
the following sub-menus:
■
"General"
( see page 22)
■
"Boiler"
■
"Heating"
■
"DHW"
( see page 23)
■
"KM-BUS"
Diagnosis: General sub-menu
"Outside temperature"
Press OK to display adjusted and actual
outside temperature.
"Central fault"
Ext. output for on-site fault signalling unit
"Time"
Displays the set time.
"Date"
Displays the set date.
Diagnosis: Boiler sub-menu
"Boiler temperature"
"Return temperature"
"Flue gas temperature:"
"Flue 02 [Residual flue gas O2]"
"Primary air valve [Primary air
damper]"
Steps
"Secondary air valve [Secondary air
damper]"
Steps
"Exhaust blower [Flue gas fan]"
Specified in rpm
"Valve position boiler"
"Valve position accumulator [Valve
position buffer]"
"Step motor voltage [Stepper motor
voltage]"
Select this menu point to check the step-
per motor. The stepper motor has devel-
oped a fault if no voltage is indicated.
Service scans
Diagnosis
(cont.)
5604 447 GB
