Saturn KDB - 251 GOM - Page 59

KDB-GOM
Series
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4
2 - 2 # 03 Failure Ignition failure
No Symptoms and causes Solutions Reference
- Check for a crack in the electrode insulator and
replace the electrode if found.
<Fig. 1>
- Check whether the high limit fuse is short
circuited through resistance measurement. If it
shows an infinite level, it is defective and
needs to be replaced.
<Fig. 2>
4) No power supply to the modulating gas
control valve.
- Check for power supply (AC 220V) from the
transformer to the modulating gas control
valve. If there is no power supply, replace the
transformer.
- If the symptoms remain after performing the
check up described above, then replace the
controller.
<Fig. 3>
5) There is power supply to the
modulating gas control valve but it is
still not working.
- Check whether the modulating gas control
valve coil is short-circuited. If the resistance
measurement shows an infinite level, replace
the modulating gas control valve.
<Fig. 4>
6) There is power supply to the
modulating gas control valve and the
coil is not damaged but still there is no
ignition.
- The internal diaphragm of the gas control valve
is defective. Replace the gas control valve.
- Using the water manometer, check the first
and second head pressure (refer to gas
pressure chart of GOM technical documents,
and adjust the first and second pressure.
<Fig. 4>
<Fig. 1>
<Fig. 4>
Electrode
Assembly
Insulator damage
<Fig. 2>
<Fig. 2>
High Limit Fuse
Measure resistance
<Fig. 3>
Power Transformer
BLK
BLK
Check AC 220V
Modulating
Gas Control Valve
Nozzle Holder
Assembly
Secondary
Pressure
Measuring Hole