Technical information

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
E33 APPEAR?
IGNITION
SPARKS ARE GENERATED
REGULARLY?
YES
N
O
NO
YES
YES
NO
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?
YES
YES
NO
NO
IS
THERE STILL
A PROBLEM?
NORMAL
OPERATION
NONO
YES
B
YESYES
YESYES
NONO
I
S THE
PUMP RUNNING?
1. Check if there is air in
the system
2. Check the main circuit flow
switch operation
3. Check the pressure on the
water gauge and fill system
to 1 bar
1. Check pump cable
2. Check/replace
main P.C.B.
Release/replace
pump
Turn the
ON/OFF button
P
OWER TO
THE PUMP?
YESYES
YESYES
IS
THE LOW WATER
PRESSURE SWITCH
WORKING CORRECTLY?
E02: does not close
NONO
NONO

A
B