THERMOBILE AT 400 Serie Manuel De L'utilisateur page 26

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6.1 Troubleshooting table
/i
Fault
The flame is extin-
guished immediately
after ignition; the
control light is off.
The flame is extin-
guished immediately
after ignition; the
control light is on.
26
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Cause
1 The heater has no volt-
age.
2 The fuel pump is not
switched on.
3 The motor and pump
are not functioning.
4 The pump thermostat
has not reached the
right temperature yet.
5 The maximum thermo-
stat is defective.
6 The overflow protection
is full of waste oil.
7 There is water or sedi-
ment in the fuel tank.
8 The fuel supply pipe is
blocked: The fuel flows
back into the fuel tank
through the return pipe.
40.020.942 - rev. 04 - 2011
Solution
Check the electric connec-
tion.
Position the switch to "1", see
fig. 5 (A).
Dilute the waste oil with die-
sel oil when the waste oil is
too viscous.
Check the pump thermostat
and replace if necessary.
Check the overflow protec-
tion switch by moving the
overflow basin a few times
from left to right.
Check whether the pump
axis can be turned manually.
Clean the pump if this is not
possible.
Check the pump motor.
Let the heater cool down.
Restart the heater.
Replace the pump thermo-
stat.
Reset the thermostat.
Replace the thermostat.
Clean the overflow basin,
burner dish and the bottom of
the vaporiser.
Clean the fuel tank and the
fuel filter, see fig. 3.
Clean the fuel supply pipe or
replace if necessary.
AT 400 - 500 series
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