507
Thermo 230 / 231 / 300 / 301 / 350
5 Troubleshooting
5.3.2.7 Fault Symptom "Solenoid Valve Defective"
NO
YES
Is the solenoid valve supplied
with electrical power?
Has the safety thermostat responded?
(Thermo 231/301 only)
Investigate the reason for the response
(e.g.check the exhaust system)
Replace the solenoid valve.
Make electrical connections.
Safety thermostat in the burner defec-
tive, replace.
Is the component test with the diagnostic computer
or the PC heater diagnosis (menu component test)
o.k. (audible click of solenoid valve)?
Does fuel leak from the nozzle in run-down?
Replace the solenoid valve.
Control unit defective, replace.
Summary of Contents for spheros thermo 230
Page 70: ...memos...
