Spheros Thermo S 160, Workshop Manual

Page: 43 / 75

5 Troubleshooting and error correction Thermo S 160/230/300/350/400
514
Inspection using SST diagnosis
t Remove burner (see 8.2).
t Connect the test plug to the adapter wiring harness.
t Reconnect the heater to the vehicle electrical system.
t
Connect the SST diagnosis adapter to the heater and
a PC via the interface in the heater wiring harness.
Start SST diagnosis, esta blish connection to the
heater and open the Component Test menu.
t
Select the electronic ignition unit in the Component Test
menu, enter a runtime and start the component test.
t Nominal condition: Ignition sparks the ignition
electrode jump over with a rate of 6Hz.
t After the test is completed, exit SST diagnosis as
needed.
t
Disconnect the heater from the vehicle electrical
system.
t
Disconnect the test plug.
t
Install burner (see 8.2).
Manual functional test when disassembled
t Remove electronic ignition unit (see 8.6).
t Connect ignition electrode.
t Apply 24V direct voltage according to Fig. 511
(10kOhm on SE input).
t
Nominal condition: Ignition sparks the ignition
electrode jump over with a rate of 6Hz.
t
After the test is completed, install the electronic
ignition unit (see 8.6) and attach the ignition electrode.
t Install burner (see 8.2).
5.5.9 Ignition electrode inspection
The ignition electrode insulation may not be damaged.
Ignition electrodes not functioning properly must be
replaced.
Do not damage the electronic ignition unit when
High voltage: The voltage received by the ignition
electrode is >13.000 Volt.
During operation or testing the ignition electrode may not
be contacted by persons or items.
Inspection
t
Remove burner (see 8.2).
t
Check distance of the electrode tip to the atomizer
nozzle (see Fig. 512).
t
Check the distance between the electrodes
(see Fig. 512).
The distance between the electrodes may b measured
using checking gauge, item number 310646.
t If needed, lift off ignition electrode (3, Fig. 805) from
the electronic ignition unit by twisting a screwdriver
sideways (see Fig. 804).
t
Inspect the ignition electrode insulation for damage.
t
Functionality is verified while inspecting the electronic
ignition unit.
Fig. 512
4
5
8
± 0,5
± 0,5
+ 1
NOTE
CAUTION
removing the ignition electrode.
WARNING
NOTE