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Troubleshooting
16
276 Motorcaravan - 14-09 - EN
16.5.3 Heater/Boiler Webasto
If a fault occurs, a fault message is output at the operating element/fault message
indicator through flash pulses. 5 rapid GREEN flashes are followed by the indication
of the fault message through a series of long RED flash pulses. This sequence is
repeated until the heater is switched off. The following table lists the number of
RED flash pulses and their meaning. Afterwards a sequence of 5 rapid GREEN flash
pulses is shown again.
Z If a fault occurs, first check whether the fuses and plug connections are in a
good state and connected properly. If this does not eliminate the fault, the
heater has to be checked by Webasto-trained personnel.
Z Number of red flash pulses 0 to 15: Heater switches off automatically.
17 red flash pulses: No switching off, but the flash pulses indicate a fault.
Number of RED flash
pulses
Meaning Remedy
00 No communication be-
tween operating element
and heater or operating el-
ement fault
Check fuses and wire har-
ness
Contact the Webasto Serv-
ice Center
01 No start (after 2 attempts
to start)
Check the fuel supply and
reset the heater (switch off
for at least 30 seconds)
02 Flame interruption
Renewed start not success-
ful
Check the fuel supply and
reset the heater (switch off
for at least 30 seconds)
03 Undervoltage or overvolt-
age
Charge the battery or con-
nect to a different power
supply (direct current, 12
V), reset the heater (switch
off for at least 5 seconds)
04 Fuel pump interruption /
short-circuit / overheating
Check the fuel pump cable
and plug. Check for over-
heating (see Faults 06 and
07), reset the heater
(switch off for at least 5
seconds)
05 Heating fan motor fault: In-
terruption / short-circuit /
fan speed not within per-
missible range / fan
blocked
Ensure that the heating air
fan can move freely, re-
move any interfering or
blocking object, reset the
heater (switch off for at
least 5 seconds)
06 Overheating or exceeded
value of water tempera-
ture sensor
Check the water level, re-
set the heater (switch off
for at least 5 seconds), or
select Winter operation,
heating without water
heating
07 Overheating Ensure that the heating air
can flow freely, and that air
inlets and outlets are not
blocked. Reset the heater
(switch off for at least
5 seconds)
276


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