Service manual

Webasto Diesel Cooker X 100 4 Failure detection
404
Bad fuel quality.
Combustion air blower
Combustion air blower does not run.
(Fault blinking).
Measure blower’s voltage,
(compare to the parameter table).
Control unit (PCB)
Replace the combustion air blower.
Control unit faulty.
Temperature sensor T4
Temperature sensor voltage does not rise
during start up.
Measure the voltage approx. 5 minutes
after the start up, voltage must be over
13mV, (sensor wires attached to the board).
Check the temperature sensor.
Replace the Control unit.
Other cause
Water in fuel.
Water inside the exhaust pipe.
Change the fuel.
Remove the water. Make sure that there is
no water lock, (water in pipe bend’s).
No fuel.
Change the fuel.
Exhaust lead through blocked. Remove blockage.
Refill fuel tank.
Cooker is smoking during start-
ing phase.
Glow plug voltage is too low, (glow plug is
not hot enough).
Check that the main cable cross area,
(mm²), is large enough. Check also all
cable connections and connectors.
Glow plug faulty,
(fault blinking)
Visual check, (often the plug changes form
when faulty)
Water in fuel. Change the fuel.
Water inside the exhaust pipe. Remove the water. Make sure that there is
no water lock, (water in pipe bend’s).