Webasto
Air
Top
Installation
Guide
–
AT2000STC
21
Air
Top
2000STC
Installation
Guide
2020
|
Webasto
Thermo
&
Comfort
Australia
Pty
Ltd.
11
Preventive
Maintenance
To
ensure
trouble
‐
free
operation
of
your
Webasto
heater,
please
observe
the
following:
1)
Operate
heater
for
at
least
an
hour
once
a
month,
regardless
of
the
season
2)
Keep
return
air
inlet
and
hot
air
outlet
free
of
obstructions
to
prevent
overheating
3)
Keep
combustion
air
inlet
and
exhaust
outlet
tube
free
of
dirt
and
obstructions
4)
Change
fuel
filter
annually
(depending
on
the
usage)
5)
Bio
Diesel
or
any
fuel
additive
is
not
permitted
6)
15A
fuse
for
both
12V
and
24V
heaters
Note:
The
build
‐
up
of
Carbon
is
not
a
warrantable
condition.
Situations
that
may
cause
Carbon
build
‐
up
in
the
heater
are:
Under
Voltage:
the
system
should
have
at
least
12.5
‐
13V;
Low
current:
the
system
requires
7
‐
8A
for
the
initial
start
‐
up
phase
for
120
seconds
and
once
the
flame
is
established
the
glow
plug
goes
out
and
heater
continues
running
at
2
‐
3A;
Under
size
wire:
where
extensions
are
made
to
the
battery
positive
&
negative
cables
only,
ensure
that
correct
wire
size
is
used;
Fuel
system:
poor
fuel
quality,
air
pockets
in
the
fuel
line
or
running
out
of
fuel;
Combustion
system:
any
blockage
or
restriction
in
the
combustion
air
tube
or
at
the
silencer;
Exhaust
system:
any
blockage
or
restriction
in
the
exhaust
muffler
or
pipe;
Isolation
switch
or
circuit
breaker:
can
prevent
the
heater
from
performing
a
correct
shut
down
cycle.
The
battery
positive
&
negative
wire
should
be
connected
directly
to
the
battery;
E
lectrical
connections:
poor
battery
connections,
poor
Earth,
loose
fuses
and
improper
crimping
of
terminals
or
plugs.
The
build
‐
up
of
Carbon
is
not
a
product
malfunction
however;
the
above
listed
are
external
factors
that
could
affect
the
performance
of
the
heater.
12
Fault
Code
In
the
event
of
a
failure,
a
flash
code
will
be
generated
on
the
indicator
light
of
the
Rotary
Control
(On/Off)
switch.
In
order
to
make
a
correct
analysis,
it
is
necessary
to
understand
the
fault
code.
The
flashing
code
will
be
visible
during
the
cool
down
period
of
the
operation.
During
the
flash
code
event
you
will
see
five
quick
flashes
followed
by
a
sequence
of
slow
flashes,
the
sequence
of
slow
flashes
is
the
actual
fault
code.
The
five
quick
flashes
are
only
an
indication
that
a
fault
has
occurred.
Count
only
the
slow
sequence
of
the
flashes
to
obtain
the
current
fault
code.
E.g.
Code
F03
=
low
or
high
battery
voltage
Pause
Pause
F03 =
Quick flashes x5
Quick flashes x5
Number of slow flashes
