Jøtul GF 400 CF Installation And Operation Instructions Manual page 16

Make sure the flame is centred at the thermocouple.
Make sure the thermocouple is enveloped by the flame
up to at least 3 mm from the tip (see fig.0). Check the
voltage generated by the thermocouple. Connect the
multimeter (fig.6-E) with plus to the ball point (D) at the
end of the copper wire. Connect minus to the copper wire.
Light the pilot (A) and hold in the control knob to prevent
the flame on the pilot burner from going out. At this
point the multimeter should show 4-8 mV. the thermo-
couple. Note that there are  threaded holes (fig. 6-B) and
(C) that can be used when installing a new thermocouple.
Make sure the blue wire (A) is fastened at the same
threaded hole. The nut on the thermocouple must not be
tightened too much, just a / turn. If the gas pressure is
correct and the possible faults above have been checked,
the pilot flame can be adjusted with the adjusting screw.
The gas volume is increased when the screw is turned
anti-clockwise.
When There is No Gas Supply to the
Burner.
This is the trouble-shooting procedure for the electrical
components:
. Make sure the control knob on the valve is set to "ON".
Check the position on the "ON/OFF/Thermostat" switch
at the back of the appliance. It should be set to the ON
position.
. Make sure the wire from the valve to the "ON/OFF/
STAT" switch is connected correctly.
This is the trouble-shooting procedure for the thermopile
(fig. 7):
. Make sure the gas pressure is correct (see section
about gas pressure, page 0).
. Make sure the pilot burner has 3 flames.
3. Make sure the flame is centred on the thermocouple.
4. Make sure the thermocouple is enveloped by the flame
up to at least 0mm (3/8") from the tip (fig 0).
5. Check the wires to the thermopile for cracks or dam-
age.
6. Dismantle the wires from the vent.
7. Dismantle optional equipment, such as thermostat or
remote control.
6
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Figure 27. Thermopile system check.
8. Check the voltage generated by the thermopile (see fig
7). Connect the multimeter with plus to one cable clip
(D). Connect minus to the other cable clip. Light the pi-
lot and make sure the control knob remains on "PILOT"
(fig. 3-B). At this point the multimeter should show
500-700mV.
9. Reconnect the wires to the valve and make sure only
the ON/OFF/STAT switch is connected.
0. Turn the control knob on the valve to "ON" and turn the
ON/OFF/STAT switch to "ON". At this point the multi-
meter should show more than 300 mV.
. If a thermostat or remote control is to be connected, it
can be done now. At this point the multimeter should
show more than 75 mV.
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