Troubleshooting The Gc124 Sp - Buderus Logano GC124 II/SP Installation And Service Instructions Manual

Boiler inspection and maintenance

16.9 Troubleshooting the GC124 SP

Equipment required: Wiring diagrams (
Start
Set gas valve ON/OFF knob
clockwise to OFF position.
Close main gas shut-off. Set
thermostat (control) to heat re-
quirement (vent damper
opens).
Switch on power.
Set gas valve ON/OFF knob
counterclockwise to PILOT posi-
tion. Open main gas shut-off.
Press red pilot ignition button
and ignite ignition flame. Hold
down red pilot ignition button for
one minute and then release. Ig-
nition flame is burning.
Set gas valve ON/OFF knob
counterclockwise to ON. Main
burner ignites.
System operates until the heat
requirement ends.
Heat requirement ended, sys-
tem switches off, vent damper
closes. Ignition flame continues
to burn.
End of troubleshooting
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Gas Boiler Logano GC124 II/SP • Issue 07/2006
Chapter 19, page 80) and voltage detectors for 120 VAC and 24 VAC.
No
• Check electrical power source, low-voltage transformer, thermostat (con-
trol) and wiring. Check that the vent damper is open and the limit switch
is present.
No
• • Prüfen, ob alle handbetätigten Gasabsperrventile geöffnet, Gasan- Check that all manually operated gas shut-offs are open; check that gas
connections and pressures are correct and that pilot orifice is not blocked. schlüsse und Druckmesswerte in Ordnung und Zündgasdüsen nicht ver-
stopft sind.
• • Verbindungen zur Gasarmatur prüfen. Check connections to gas valve.
• • Geht die Zündflamme aus, prüfen, ob das Thermoelement dicht mit den If the ignition flame goes out, check that the thermocouple is firmly
Gasventilen abschließt; wenn ja Thermoelement austauschen. screwed to the gas valve; if yes, replace thermocouple.
• • If the ignition flame continues to go out, replace gas valve. Geht die Zündflamme immer wieder aus, Gasventile austauschen.
No
• Check 24-V voltage at the gas valve.
• Check electrical connections to gas valve. If OK replace gas valve.
No
• Check that the ignition flame surrounds the thermocouple and burns
evenly with a bluish flame. If OK replace thermocouple.
No
• Check operation of thermostat (control).
• Disconnect 24-V connection to gas valve. If gas valve closes, check ther-
mostat and electrical wiring again.
• If the gas valve does not close, replace gas valve.
Repeat procedure until heating system operates properly.
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