Buderus Logano GA124 Installation And Maintenance Instructions Manual page 57

Boiler inspection and maintenance
Ignition spark stops as soon as
ignition flame burns.
Ignite main burner.
System operates until the heat
requirement ends.
Heat requirement ends,
system switches off.
End of troubleshooting
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano GA124 special gas-fired boiler • Issue 04/2005
No
Check S 8600 H automatic igniter.
• Check ignition wiring and ground for continuity.
• Check ignition electrode.
• Check electrical connections between ignition electrode and automatic
ignition.
• Check whether the ceramic insulator in the ignition electrode is broken.
• Check that the ignition flame surrounds the electrode and burns steadily
with a bluish flame.
Adjust ignition flame.
• If this does not correct the fault, replace the automatic ignition unit.
Check gas fitting and S 8600 H automatic igniter.
No
• Use MV-MV/PV terminals to check 24 V alternating current and closed
circuit at automatic igniter. If there is no voltage, replace automatic ignition.
• Check electrical connections between automatic ignition and ignition timer
on the gas fitting.
If OK replace gas fitting.
Check S 8600 H automatic igniter.
No
• Check ignition wiring and ground for continuity. Note: If the ground is
weak or faulty, the system may switch off at random even
if the heating system operates properly when tested.
• Check that the ignition flame surrounds the electrode and burns steadily
with a bluish flame.
• If everything is OK replace automatic ignition.
Check gas fitting and S 8600 H automatic igniter.
No
• Check operation of thermostat (control).
• Disconnect MV wire on automatic igniter.
• If the valve closes, check temperature regulator and wiring again, replace
automatic igniter.
• If the valve does not close, replace gas fitting.
Repeat procedure until heating system operates correctly.
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