Ariston NEXT SFT 14 Manuel de l'utilisateur - Page 35

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6.4 Fault ﬁ nding chart

PRELIMARY CHECKS

Make sure that:

1 - The mains water supply is turned on

2 - The gas is turned on

3 - The electrical supply is turned on

PRESS THE ON/OFF BUTTON

DRAW OFF WATER >2.5 l/min

IS THE AIR º

PRESSURE SWITCH

IN OPEN CIRCUIT?

HAS THE FAN

STARTED TO RUN?

HAS THE

IGNITION SEQUENCE

BEGUN?

IS SPARK

GENERATION

NORMAL?

IS THE BURNER

ALIGHT?

HAS THE

APPLIANCE SAFETY

SHUTDOWN BEEN

ACTIVATED?

1 - Check/replace connection cable

2 - Check/replace the air pressure switch

3 - Check/replace the printed circuit board

MOMENTARY

1 - Check/replace connection cable

POWER TO

2 - Check/replace the printed

FAN?

1 - Replace fan

IS FAN

RUNNING

CONTINUOUSLY?

1 - Check air pressure switch

2 - Check venturi & pipes

3 - Check fan efficiency

1 - Check ignition electrode cable

2 - Check/replace ignition electrode

3 - Check/replace the P.C.B.

1 - Check power supply of gas valve

2 - Check operation of gas valve

3 - Replace gas valve

4 - Check/replace the P.C.B.

1 - Check if flame strikes detection electrode

2 - Check/replace detection electrode

3 - Check/replace the P.C.B.

6. maintenance

circuit board