Ariston microGENUS II 24 MFFI Installation And Servicing Instructions page 51

B
NO NO
IS THE FAN
RUNNING?
YES YES
IGNITION
SPARKS ARE GENERATED
REGULARLY?
YES YES
NO NO
IS THE BURNER
ALIGHT?
YES YES
IS
YES YES
THERE STILL
A PROBLEM?
NO NO
NORMAL
OPERATION
DOES CODE
E33 APPEAR?
1. Check the fan cable
NO NO
2. Replace the fan
3. Replace the main P.C.B.
Replace
the main P.C.B.
1. Check/replace ignition
NO NO
electrode
2. Check ignition cable
3. Check/replace the main P.C.B.
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.
NO NO
BOILER HAS
SHUTDOWN?
YES YES
1. See section 3.6
2. Press RESET
1. See section 3.6
YES YES