Installation Manual

68
5350 485 GB 08/2007
Function sequence and possible faults
Control unit issues
heat demand
Increase set value
and ensure heat is
drawn off
Fan starts after approx. 51 s
Fault F9
Check the fan,
fan connecting
cables, power at
the fan and fan
control
Display screen
No
No
Ye s
Ignition Fault F4 Check the ignition
module (control
voltage 230V
across plugs
“X2.1” and “X2.2”
No
Ye s
Gas train opens Fault F4 Check the gas
train (control
voltage 230 V);
check the gas
supply pressure
No
Ye s
Ionisation current
symbol displayed
Fault F4
Check the
ionisation electrode
adjustment and the
gas pipe for airlocks
No
Ye s
Measures
Vitoden 200-W pages 44 - 4/9/07 7:56 pm Page 25