Webasto Diesel Cooker x100 Service Manual - page 21
Webasto Diesel Cooker X 100
4 Failure detection
407
Leds on the control panel
Yellow LED
If the device does not shut off in the heating phase,
after the initial testing, due to a defect, then the
start-up will continue and the yellow LED light will
illuminate and remain on continuously.
Initial testing
One quick flash of the yellow LED indicates that
there is a malfunction in the glow
plug
.
The
LED light
will b
e on for 0.125 seconds and off for two seconds,
after which it will repeat the sequence. The glow
plug
defect may be due to a short circuit or complete
breakage.
Two quick, consecutive flashes of the yellow LED
light indicate a malfunction in the burning fan. In this
case, the LED is on for 0.125 seconds at first, then it
is off for 0.125 seconds and then on again for
another 0.125 seconds. After the second flash, the
LED is off for two seconds before it makes a new
double flash. The malfunction is either due to a short
circuit or the routing for the burning fan is completely
broken.
Three quick, consecutive flashes of the yellow LED
light indicate a malfunction in the main fan (other
names include rotary fan, ventilation fan or cooling
fan). Each flash lasts 0.125 seconds and the time
between two consecutive flashes is also 0.125
seconds. After the third flash the LED light is off for
two seconds before it makes a new triple flash. The
main fan’s malfunction is either due to a short circuit
or the routing for the main fan is completely broken.
The main fan should be tested in the ventilation
stage as well.
Testing the power control: the flashing speed of the
yellow LED light only changes according to the
potentiometer setting when the pin pair, S1, is
closed. When S1 is open, the speed of the flashing
correlates to the minimum of the potentiometer
regardless of the potentiometer’s actual position.
Indication of a malfunction in the operating voltage
A uniform flashing of the yellow LED light indicates if
and when the battery voltage has decreased below
10.7 V. The LED light is on for 0.25 seconds, turns on
and off alternatingly.
Third attempt to start the device
After two unsuccessful attempts to start the device, the
third attempt will lock it. In this case all LEDs will begin
to flash at a quick pace. The LEDs flash on and off for
a duration of 0.125 seconds.
Incorrect device parameters
If the device’s parameters are not set within the
permitted range of values at the point of start-up,
then the device will not start. However, the attempt
to start the device counts towards one start-up. All
LEDs will begin to flash in a circulating pattern; each
LED light will be on for a duration of 0.125 seconds.
All LED lights shut off for a duration of 0.125
seconds between the time the first LED light shuts
off and another LED turns on. The LEDs circulate in
the following order: the yellow LED light and the red
LED light. During normal use, incorrect device
parameters should not occur in the device’s memory
because the XP Link terminal programme does not
allow users to enter incorrect parameters into the
device’s memory.
Test phase
When the thermostat pin pair, S1, is closed, the
yellow LED light flashes according to the
potentiometer setting during the test phase. In this
case, when the potentiometer is at the minimum, the
LED light flashes on and off for a duration of 0.5
seconds. When the potentiometer is at the
maximum, the LED light flashes on and off for a
duration of 0.05 seconds. The LED light flashes on
and off for a duration of 0.5 seconds when S1 is
open.
Descriptions of the flashing LED lights beginning from XPS v 1.2.