KDB-GOM
Series
- 63 -
5 # 06 Failure Short circuit of the heating temp. sensor
No Symptoms and causes Solutions Reference
Failure code # 06 is displayed when the
heating temp. sensor shows a
temperature greater than 120
℃
,
interpreting it as a short circuit of the
heating sensor. A bad heat circulation or
a mechanical deficiency may abruptly
increase the temperature.
1 When the circulation pump does not
work.
- Check for the short circuit of the circulation
pump coil. Measure the resistance and if it
displays infinite level (0 level is normal) the coil
is short-circuited and the circulation pump has
to be replaced.
<Fig. 1>
- Check whether the 3-way valve coil is short
circuited. Measure the resistance and if it
displays infinite level (“0” level is normal) the
coil is short-circuited and the 3-way valve has
to be replaced. Check whether the ball inside
the 3-way valve has fallen and if it did replace
the 3-way valve.
<Fig. 2>
2 In case the ball falls down when the 3-
way valve is on the hot water side, the hot
water flow switch will also always be on
the hot water side. Therefore, since the
heating water is not circulating, the
temperature goes up abruptly when the
boiler starts operation.
- Check the point of contact of the hot water flow
switch when the boiler is idle. If it shows a
resistance of infinite level it is normal but if it
shows “0” it is defective and the hot water flow
switch has to be replaced.
- If the symptoms remain after performing the
check up described above, then replace the
heating temp. Sensor and the main controller.
<Fig. 3>
<Fig. 1>
<Fig. 2>
<Fig. 3>
Measure
resistance
Circulation Pump
Hot Water Flow Switch
3-Way Valve
Check whether ball has fallen
Measure
resistance
Measure
resistance
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