Saturn KDB - 161 GOM Manual page 74

14 - 2
Room thermostat, FR-5
Operating lamp
No Symptoms and Causes
First, set the room thermostat to the
domestic water position and open the
domestic water tap.
1 The operating lamp does not light up.
2 It is operating but domestic water
does not come out.
3 The operating lamp is working but the
heating pipeline is not warm and
domestic water does not come out.
4 In case hot water does not come out
during operation, tap inlet and
domestic water outlet pipes are
switched, and domestic water does
not come out because hot water flow
switch is not working.
Others Failure
Hot Water Flow Switch
<Fig. 1>
- The operating lamp does not light up because
- Open the domestic water tap and measure the
- Replace the 3-way valve if the heating pipeline is
- In case there is no heat exchange in the
- If symptoms remain after the checking above, it
- Check the piping of the switched tap water inlet
Heating is working but domestic water comes
out cold or does not come out at all.
Measure
resistance
Supply
Return
<Fig. 2>
Solutions
the hot water flow switch is defective. Replace it.
resistance of the hot water flow switch terminal.
If it shows "0" it is normal, if it shows infinite it is
defective.
warm, meaning the transition to heating water
supply mode has not been done due to a failure
of the 3-way valve.(check whether the coil is
short circuited and the ball damaged)
domestic water heat exchanger, touch the heat
exchanger. One side is very hot and the other
side cold. Replace the domestic water heat
exchanger.
may be a problem of hot water supply capacity
from the boiler. Check it out.
and domestic water outlet.
- 74 -
KDB-GOM
Series
Domestic Water
Outlet
Tap Water
Inlet
<Fig. 3>
Reference
<Fig. 1>
<Fig. 2>
<Fig. 3>