General - Webasto Thermo Top V Workshop Manual

Thermo Top V
6 Operating tests
6.1

General

This section describes the tests of the heater and its compo-
nents in the installed and the removed state.
WARNING
The heater must not be operated in enclosed areas such as
garages and workshops without an emissions extraction sys-
tem.
6.2 Operating checks in vehicle
6.2.1 Testing heating mode
1 Make sure that the vehicle fan speed is set to the slowest
or to the speed recommended in the operating instruc-
tions.
2 Make sure that the air ducting to the heater is clear of
foreign bodies (snow, leaves, etc.) and any pollen and
dust filter are clear.
3 Make sure that the coolant circuit and the fuel system
are carefully bled in accordance with the vehicle manu-
facturer's specifications.
4 Make sure that the fuel fill level is not at Reserve (1/4 fuel
tank capacity) and the operating voltage is greater than
11.5 V.
5 Switch on the heater with the heater control or the
Webasto Thermo Test PC Diagnosis.
6 When the heater is switched on, the circulating pump
and the combustion air fan run (perceptible by listening).
The vehicle fan runs when the coolant temperature has
reached approx. 40 °C to 50 °C.
7 The heater then starts after approx. 130 sec. This can be
detected from exhaust exiting at the exhaust silencer or
connection piece.
8 Allow the heater to run. Check the heating effect at the
air outlet of the vehicle fan.
The heating effect is dependent on several factors:
To evaluate it, the outside temperature, the vehicle
model, the engine temperature and the type of integra-
tion in the vehicle cooling system, the quantity of coolant
to be heated up and the time since the start must be
used for the evaluation.
Visit www.butlertechnik.com for more technical information and downloads.
NOTE
www.butlertechnik.com
9 Switch off the heater again with the heater control or
the Webasto Thermo Test PC Diagnosis.
• The run-on is activated with the heater is switched
off. This is apparent from the fact that exhaust stops
exiting and the circulating pump continues to run
(perceptible by listening).
• Then the heater is switched off completely (with the
auxiliary heater, with the ignition switched off).
6.2.2 Setting CO content
2
The heater is optimally set to a CO
altitudes between 0 and 1,000 m above sea level at the fac-
tory. Continuous operation above 1,000 m above sea level
can result in heavy smoking and soot formation and in fail-
ure of the unit.
IMPORTANT
After replacing the fan unit or the control unit, the CO
value must be reset in full-load combustion operation!
The CO value of the exhaust gas must be measured only
2
after the heater has operated in full-load combustion for
approx. 8 min. Measure the CO
end of the exhaust outlet using a CO
The CO setting is carried out with Webasto Thermo Test PC
2
Diagnosis.
Fig. 601 CO setting
2
The hose -2- of the exhaust probe may not hinder the
exhaust from exiting the exhaust pipe -1- during the test.
Operating tests
value for operation at
2
NOTE
approx. 20 mm from the
2
meter (e.g. from MSI).
2
NOTE
2
601