
KDB-GOM
Series
- 57 -
1
# 02
Failure
Low water level
No
Symptoms and Causes
Solutions
Reference
The heating flow sensor has to be ON within
3 seconds after the power supply. If it is still
OFF after 3 seconds, the failure code # 02
will be displayed.
1) Heating valve (Splitter) is closed.
- Open the splitter valve
<Fig. 1>
2) Heating water is lacking.
- Adjust the heating pressure gauge between
0.5~1.5kg
f
/cm
2
(49 ~147 kPa)
<Fig. 2>
3) Too much air in the heating line.
- Remove air from the heating line.
4) The circulation pump is working but there
is not enough RPM or the impeller is
damaged.
- Check the resistance of the circulation pump
coils terminal. 0 level is normal. If it shows
infinite level the coil is short-circuited and the
circulation pump has to be replaced.
<Fig. 3>
1
5) There is no point of contact in the heating
flow sensor.(close model)
- When the boiler is running and the heating flow
sensor point of contact is normal, the
resistance should be 0. if it shows an infinite
level it is defective and has to be replaced.
- Reconnect the boiler earth wire.
<Fig. 4>
Check valve is open
Splitter valve
<Fig. 1>
<Fig. 4>
Circulation pump
<Fig. 3>
Heating flow sensor
kgf/
㎠
(kPa)
0.5
(49)
1.5
(147)
Heating Pressure gauge
<Fig. 2>
Measure
resistance