Webasto Air Top 2000 ST Operating, And Servicing Instructions - page 4
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
Flame monitor (petrol heater) interrupt or
short circuit
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
Overheating sensor incorrectly installed
Setpoint generator short circuit
F 00
F 05
F 11
F 12
F 14
F 15
F 01
F 02
F 03
F 04
F 06
F 07
F 08
F 09
F 10
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 faults, such as overheating or no start, occur frequently, the heater will be
set to fault lock-out (F 12) and can be restarted by disconnecting the supply voltage
(e.g. removing and reinserting the fuse).
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