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Heater cuts out automatically
Black smoke is emitted from the heater
Cause
Cause
Remedy
Remedy
Troubleshooting Error code output on combination timer or control element
NOTE for ADR mode only:
!
If an error occurs, first check the fuse and plug connections to ensure that they are in
perfect condition and connected correctly.
If the action described below does not rectify the error, have the heater checked by
Webasto-trained personnel.
Control unit error
No start (after 2 attempts to start)
Flame failure (at least > 3)
Undervoltage or overvoltage
Premature flame recognition
Temperature sensor interrupt or temperature
sensor short circuit
Metering pump interrupt or metering pump
short circuit
Fan motor interrupt or fan motor short circuit
or fan motor overload or blocked
Glow plug interrupt or glow plug short circuit
Overheating
Overheating sensor interrupt or overheating
sensor short circuit
Heater lock-out
Heater lock-out permanent
Overheating sensor incorrectly installed
Setpoint generator short circuit
F00
F11
F12
F13
F14
F15
F01
F02
F03
F04
F06
F07
F08
F09
F10
If the system is fitted with a combination timer, when an error occurs an error code is
output on the timer's display until the heater has been rectified.
If the system is fitted with a control element, when an error occurs an error code is output
by the indicator/error code display flashing. After a burst of fast flashes the error code will
be output by a sequence of long flashes, the number of which is shown in the table
below.
Error code Meaning
If serious errors, such as overheating or no start, occur frequently, the heater will be set
to permanent fault lock-out (F 12 or F 13) and cannot be restarted until it has been
repaired by Webasto-trained personnel.
After an ADR cut-out or the application of operating voltage by switching on the main
vehicle switch and setting the control element to ”ON” the control unit will be set to
the “Fault cut-out” position.
Before the heater can be restarted the control element must be set to “OFF” or the
immediate heat button on the combination or standard timer must be pressed.
No combustion after start
and repeat start
Flame extinguishes during
operation
Heater overheats
Indicator flashes
Vehicle voltage too low
Combustion air and/or
exhaust system blocked
Switch the heater off (wait at least 2 seconds) and
then on again
Switch the heater off (wait at least 2 seconds) and
then on again
Check that the hot air can flow freely.
Allow the heater to cool.
Switch the heater off (wait at least 2 seconds) and
then on again
Charge battery
Switch the heater off (wait at least 2 seconds) and
then on again
Check combustion air and exhaust system for
blockages
4


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