Webasto Water Heater
Vehicle with ADR
In the vehicle with ADR, the present time and alarm can be set
while the ON time cannot be set. The remaining time shows on the
display when the heating is working.
Failure removal
Check the connection of fuse and electrical units in failure.
When the heater with the control units being157217 is in the
statement of failure, the failure code which helps find reasons turns
on by the switch or timer.
Automatic OFF (failure lock)
Reason: It does not work normally after turning on. Measure: Turn
off the heater and turn on it again.
Reason: The flame is off while running. Measure: Turn off the
heater and turn on it again.
Reason: The heater turns off because of overheating such as lack
or no coolant. Measure: Fill the coolant and press the
temperature button. Note: Concerning the THERM0231 /301, the
temperature button returns back automatically.
Reason: The voltage is too low. Measure: Charge the battery.
Reason: Turn off and on again. Measure: Deal with the block of
the combustion air pipe or outlet pipe.
Failure code display
Regard the heater with control unit1572D and standard timer,
the failure code shows on the timer in case of any failure.
Flash code on the timer
The failure is indicated with the indicator lights or flash code
when the heater is controlled by the switch. The slow flash times
93
