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21
B063
IS THE BURNER
ALIGHT?
YES
NO
YES
YES
YES
NO
NO
NO
NO
YES
1 - Check/replace ignition
electrode
2 - Check ignition cable
3 - Check spark generator
4 - Check ignition electrode
cable
5 - Check/replace P.C.B.
1 - Check if flame strikes
detection electrode
2 - Check soft-light gas
pressure
3 - Check/replace detection
electrode
4 - Check/replace P.C.B.
1 - Check power supply of
gas valve
2 - Check/replace P.C.B.
3 - Check efficiency of
gas valve
4 - Replace gas valve
Shutdown L.E.D. off
fan restarts
IS THE
AIR PRESSURE SWITCH
ACTIVATED?
CHECK
∆P ON TEST
PRESSURE
INTAKE
IS FLUE
DISCHARGE
NORMAL?
HAS THE
BOILER SAFETY
SHUTDOWN BEEN
ACTIVATED?
HAS THE
BOILER SAFETY
SHUTDOWN BEEN
ACTIVATED?
1 - Check exhaust discharge
2 - Check venturi & pipes
3 - Check fan efficiency
1 - Check A.P. switch cable
2 - Check/replace A.P. switch
3 - Check/replace P.C.B.
C
D
P 1.2 mbar
P 1.2 mbar
∆
∆
∅
≤
FC004Ad