Operating instructions

Supply pressure (flow pressure) Action

For natural gas For LPG

Below 17.4 mbar Below 25 mbar Do not start the boiler. Notify your gas

supply utility or LPG supplier.

17.4 to 25 mbar 25 to 47 mbar Start the boiler.

Above 25 mbar Above 47 mbar Contact your gas supplier if the supply

pressure is incorrect.

Function sequence and possible faults

Display Action

Control unit is-

sues a heat de-

mand

Increase set value

and ensure heat is

drawn off

Yes

Fan starts

After approx. 51 s,

fault F9

Check the fan, fan

connecting cables,

power at the fan

and fan control

Yes

Ignition

Fault EE

Check ignition

module (control

voltage 230 V

across plugs

"X2.1" and "X2.2").

Check the gas sup-

ply.

Yes

Gas train opens

Fault EE

Check the gas train

(control voltage

230 V) and gas

supply pressure

Commissioning, inspection, maintenance

Further details regarding the individual steps

(cont.)

5772 909 GB

Service