Spheros Thermo S 160, Workshop Manual

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5 Troubleshooting and error correction Thermo S 160/230/300/350/400
506
Are the combustion air intake opening and line and the
exhaust line clean and securely mounted?
Clean and securely mount the combustion air intake
opening and line and the exhaust line.
Is sufficient fresh air intake ensured and are no exhaust fumes
drawn in?
Secure fresh air supply. Prevent
exhaust intake.
Is the fan wheel properly secured?
Are all screw connections tightened and ensured that no air
escapes?
Properly secure the fan wheel. Make sure that all screw
connections are tightened an d that no air escapes.
Is the flame detector inspec tion glass and/or the flame
detector clean and undamaged?
Clean the flame detector inspection glass and/or
the flame detector. If the flame detector is damaged,
replace the control unit.
Is the correct disc installed and properly mounted? Install the correct disc and mount it properly.
Is the distance of the ignition electrodes OK and/or is the
ignition electrode properly fitted?
Replace and/or properly fit ignition electrodes.
Is the atomizer nozzle clean, without deposits and properly
screwed in?
Does the atomizer nozzle properly atomise?
Replace or properly mount t he atomizer nozzle. Do not
clean it!
Is the fuel used suitable for the operating
temperature?
Use fuel suitable for the operating temperature. If needed,
clean all parts routing fuel and replace fuel filter.
Is the fuel filter
contaminated,
clogged or leaking?
Replace the fuel
filter.
Is the fuel line leaking
on the suction side or is
a line closed?
Re-tighten screw
connections. Replace
or open all lines as
needed.
Are the fuel lines
empty?
Fill lines (several start
repetitions or purging
procedure as
needed).
Are the O-rings installed
in the fuel pump?
Are they tightly
screwed on?
Replace O-rings and
filter (screen) as
needed.
Does the solenoid
valve open?
Replace fuel pump.
Replace the complete
solenoid valve.
Replace control unit.
Is the pump pressure
OK?
Switch heater on or start
motor component test:
Does the fuel return work?
Is the fuel in the fuel supply
line and the fuel return line
bubble-free?
NO
YES
Switch heater on or start burner motor component test: Does
the burner motor start?
Are all electrical connec tion plugged in and undamaged?
Check the burner motor
Connect electrical c onnections or replace
damaged parts.