Webasto DBW 2010 Service And Repair Manual

Webasto Product N.A., Inc. 30 www.techwebasto.com
TROUBLESHOOTING DBW 2010/2020/300 COOLANT HEATERS
5.3.7 HEATER SMOKES
5.3.8 HEATER CANNOT BE SWITCHED OFF
YES
NO
Does heater smoke more
than 20 seconds?
Does heater smoke
after switching OFF?
Fuel solenoid valve
piston is leaky
Does heater smoke
during operation (also
in waves)?
Are ignition electrodes
set correctly according
to setting gauge?
Replace fuel nozzle
Set ignition electrodes
correctly with setting
gauge
Did other unsuccessful
start attempts precede?
Flow through fuel nozzle
insufficient, - replace;
does heater continue to
smoke?
Any accumulated fuel in
the combustion chamber
must be allowed to burn
off; Does heater
continue to smoke?
Open burner, remove
combustion chamber;
are there coke deposits
visible in the combustion
chamber?
Clean combustion
chamber
Replace fuel nozzle
Is there current through
the switch or timer
when switched OFF?
Does heater continue to
run more than 180 sec.
after switching OFF?
Do exhaust gases still
emit from the exhaust
pipe after switching
OFF?
Electronic control unit
defective
Switch or timer defective
Does control thermostat
open when the upper
set point is reached?
No positive voltage on
the fuel solenoid valve?
Does fuel solenoid valve
close (stuck open)?
Control thermostat
defective?
Electronic control unit
defective
Solenoid valve defective

Webasto DBW 2010 Specifications

General

Brand	Webasto
Model	DBW 2010
Category	Water Heater
Language	English