506
Thermo E+ 120/200/320
5 Troubleshooting
Fuel
Fuel is not supplied or not
bubble-free (return and / or
supply line)
Fuel filter contaminated, clog-
ged or leaking
Check fuel filter and filter
head for damage, is it soiled,
clogged or leaking?
The fuel line is leaking on the
suction side or a line is
completely or partially closed
(e.g., taps, kinks, valves)
Re-tighten screw connec-
tions; if necessary, replace or
open lines, observe installa-
tion instructions (e.g. bending
radii of fuel lines)
Fuel lines or the fuel filter are
empty / not pre-filled
Fill the fuel lines and the fuel
filter (bleeding procedure)
The fuel used is not suitable
for the operating temperature
Use fuel suitable for the
operating temperature
Prescribed nozzle block pre-
heater and / or heated fuel fil-
ter are / is not in operation /
not installed
Install prescribed nozzle
block pre-heater and / or
heated fuel filter and check
that they are working properly
(see TI BioDiesel and TI Par-
aff. fuels)
Leaks due to missing or
damaged seals in the fuel
system, including fuel pump
Check fuel system for leaks
and repair if necessary, inclu-
ding fuel pump
Clutch malfunction
Check coupling and replace if
necessary (check cause!)
The shaft of the fuel pump
does not rotate
Replace fuel pump
Fuel is not atomized properly
Atomizer nozzle not free from
deposits / damaged or not
screwed in correctly
Replace atomizer nozzle,
(DO NOT clean! pay attention
to annual change interval)
The fuel used is not suitable
for the operating temperature
Use fuel suitable for the
operating temperature
Prescribed nozzle block pre-
heater and / or heated fuel fil-
ter are / is not in operation /
not installed
Install prescribed nozzle
block pre-heater and / or
heated fuel filter and check
that they are working properly
(see TI BioDiesel and TI Par-
aff. fuels)
Incorrect pump pressure
Check / correct pump pres-
sure; if necessary, replace
fuel pump
Solenoid valve malfunction
Check solenoid valve for
function and correct
assignment of voltage vari-
ant and replace if necessary
Continued on next page
Table 503 Error symptom "No start within safety period“ and “Flame interruption“
Medium
Kind of check /
error symptom
Possible cause
Fault elemination
Summary of Contents for Thermo E+ 120
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