5 Troubleshooting and error correction
Thermo S 160/230/300/350/400
516
5.5.11 Fuel pump inspection
The pump pressure of the fuel pump is adjusted to a
fixed value in the factory.
It is not permitted to change the pump pressure.
If the specified pressure cannot be reached, the fuel
pump must be replaced.
According to the manufacturer's specifications the fuel
pump and fuel hoses must be replaced after 5 years.
If bio diesel or FAME is used, the fuel pump and fuel
lines must be replaced according to the latest
technical information / notification.
The ignition electrode must be removed during the
pump pressure check.
The fuel pump pressure can be checked while the burner
is disassembled, using the Component Test menu of SST
diagnosis.
A pressure test unit with a display range from 0 to 15 bar
is required (Fig. 514).
The pressure test unit can be obtained from a Spheros
Service Center or a distribution partner.
The following inspections should be performed prior
to testing the pump pressure:
t
Is the CO 2 content properly adjusted?
t
Do the fuel pump and atomizer nozzle used
correspond to the heating capacity class?
t
Is the fuel temperature 15...25°C?
t
Are available check valves in the fuel (pre-)flow and
return line opened?
t
Was the fuel filter in the fuel (pre-)flow line replaced?
t
Are the filters (screens) in the pump inlet clean?
t
Is the fuel delivered without bubbles?
Attach a transparent hose for testing.
Inspection using SST diagnosis
t
Remove burner (see 8.2).
t
Connect the test plug to the adapter wiring harness.
t
Connect the heater to the v ehicle 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, establish connection to the
heater and open the Component Test menu.
t
Select and start the pump pressure test in the
Component Test menu.
t
Check the information and follow the instructions
provided by SST diagnosis.
t
The motor is started using the speed programmed in
the control unit.
t
Compare the actual pressure with the target pressure
in Table 503.
If the specified pressure cannot be reached, the fuel
pump must be replaced.
t
Follow the instructions provided by SST diagnosis.
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).
Table 503 Fuel pump pressures
Heater
CO
2
without fuel
delivery by
nozzle
with
fuel
delivery by
nozzle
[Vol.-%]
[bar]
[bar]
S160
9.5 + 1.5
10.1 ± 0.3
10.0 ± 0.4
S230
9.5 + 1.5
10.2 ± 0.3
9.8 ± 0.4
S300
9.5 + 1.5
10.6 ± 0.3
10 ± 0.4
S350
9.5 + 1.5
10.9 ± 0.3
10.4 ± 0.4
S400
9.5 + 1.5
9.5 ± 0.3
9.1 ± 0.4
NOTE
CAUTION
WARNING
NOTE
Summary of Contents for Thermo S 160
Page 2: ......
Page 6: ...1 Introduction Thermo S 160 230 300 350 400 4...
Page 11: ...S o m r e h T n o i t c u d o r t n I 1 160 230 300 350 400 105...
Page 49: ...5 Troubleshooting and error correction Thermo S 160 230 300 350 400 520...
Page 55: ...r e h T s m a r g a i d c i t a m e h c S 6 mo S 160 230 300 350 400 606...
Page 71: ...9 Modifications and retrofits Thermo S 160 230 300 350 400 902...
Page 73: ...10 Packing storage shipping Thermo S 160 230 300 350 400 1002 Empty page for notes...
