20
D
S
GB
F
Control and safety devices
• If the
AIRTRONIC
does not ignite within
90 seconds after fuel pumping has started, then
the start is repeated in the manner described
(refer to page 19).
A malfunction cut-off is effected if after a further
90 seconds of fuel pumping the
AIRTRONIC
once
again fails to ignite, i.e. fuel pump switches off and
the ventilator continues to run for approx. 4 minutes.
• If the flame extinguishes by itself during operation,
a renewed start is carried out first. If the
AIRTRONIC
fails to ignite within 90 seconds after
fuel pumping has started again or if it does ignite
but then extinguishes itself within the next 15
minutes, a malfunction cut-off is effected, i.e. fuel
pump switches off and the ventilator continues to
run for approx. 4 minutes.
It is possible to override a malfunction cut-off by
briefly switching the heater off and on again.
Do not repeat this more than twice in succession!
• In the case of overheating, the flame monitor /
overheating sensor will respond, the fuel supply will
be interrupted and a malfunction cut-off will be
effected.
Once the cause of overheating has been
eliminated, the
AIRTRONIC
can be restarted by
briefly switching it off and on again.
• If the upper or lower voltage limit is reached,
a malfunction cut-off is effected after 20 seconds.
• The
AIRTRONIC
will not start if the glow plug or
ventilator motor is defective or if the electrical line
to the dosing pump is interrupted.
• In the case of defect sensor – flame monitoring /
overheating or interrupted electric lead, the
AIRTRONIC
starts and the malfunction shutdown
then takes place during the start phase.
• The speed of the fan motor is continuously
monitored.
If the fan motor does not start or if the speed
deviates by more than 10%, a malfunction cut-off
is effected after 30 seconds.
• When switching off the
AIRTRONIC
, the glow plug
is switched on for 40 seconds, while the fan motor
is running, (afterglowing) to clean it of any
combustion residues.
Forced cut-off in GGVS / TRS 003 / ADR / ADR 99
If it has been installed in vehicles used to transport
dangerous substances (e.g. road tankers), the
AIRTRONIC
must be switched off before any
hazardous area (refinery, petrol station, etc.) is
entered. If this is not complied with, the
AIRTRONIC
will automatically shut down if:
• The vehicle’s engine is turned off.
• An accessory unit is switched on
(e.g. auxiliary drive for the unloading pump)
• A vehicle door is opened
(TMD regulation; only in France).
After cut-off, the fan will briefly continue to run
for max. 40 seconds.
In the event of a malfunction, check the
following points
If the
AIRTRONIC
does not start when it is switched
on:
• Switch off the
AIRTRONIC
and then switch it back
on again, but no more than twice in succession.
If the
AIRTRONIC
still does not start, then check:
• Is there fuel in the tank?
• Have any fuses blown?
AIRTRONIC
12 V – main fuse 20 A
AIRTRONIC
24 V – main fuse 10 A
AIRTRONIC
12 / 24 V – fuse, actuation 5 A
• Are all electric wires and connections ok?
• Are the heating-air duct, combustion-air duct
or the exhaust-gas duct blocked?
If all the above points are ok, conduct a diagnostic
test with the JE-diagnostic instrument or with the
module clock as described in the trouble shooting
and repair instructions for the
AIRTRONIC
.
Please note!
In order to protect the electric / electronic
components of the
AIRTRONIC
while electric welding
work is being carried out on the vehicle, the battery’s
positive pole is to be disconnected and connected
to earth.
