Ariston microGENUS II 31 MFFI - Page 51

1. Check the fan cable
2. Replace the fan
3. Replace the main P.C.B.
1. Check/replace ignition
electrode
2. Check ignition cable
3. Check/replace the main P.C.B.
Replace
the main P.C.B.
IS THE FAN
RUNNING?
DOES CODE
E
33 APPEAR?
IGNITION
SPARKS ARE GENERATED
REGULARLY?
YESYES
NONO
NONO
YESYES
YESYES
NONO
1. Check the power supply
of the gas valve.
2. Check for an air
pressure signal
3. Check the gas pressure
on the burner
4. Check the soft-light
adjustment
5. Replace the gas valve
6. Check/replace the
main P.C.B.
1. See section 3.6
2. Press RESET
1. See section 3.6
IS THE BURNER
ALIGHT?
BOILER HAS
SHUTDOWN?
YESYES
YESYES
NONO
NONO
IS
THERE STILL
A PROBLEM?
NORMAL
OPERATION
NONO
YESYES
B