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8. FAULT FINDING 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 OF WATER > 2.3 L/min
HAS THE
MICROSWITCH
CLOSED?
HAS THE FAN
STARTED TO RUN?
YES
YES
HAS THE
IGNITION SEQUENCE
BEGUN ?
IS SPARK
GENERATION
NORMAL ?
IS THE BURNER
ALIGHT ?
HAS THE
BOILER SAFETY
SHUTDOWN BEEN
ACTIVATED ?
NO
NO
YES
YES
MICROSWITCH?
1 - Replace microswitch
NO
NO
1 - Replace fan
NO
NO
YES
YES
CONTINUOUSLY?
NO
NO
YES
YES
NO
NO
YES
YES
YES
YES
NO
NO
A
1 - Check/replace connection cable
POWER TO
2 - Check/replace water group diaphragm
NO
NO
3 - Check/replace the printed circuit board
YES
YES
1 - Check/replace connection cable
MOMENTARY
NO
NO
2 - Check/replace control box
POWER TO
3 - Check/replace electrical box
FAN ?
YES
YES
IS FAN
RUNNING
YES
YES
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 control box
4 - Check/replace electrical box
1 - Check power supply of gas valve
2 - Check efficiency of gas valve
3 - Replace gas valve
4 - Check/replace control box
5 - Check/replace electrical box
29
1 - Check if flame strikes detection electrode
2 - Check soft-light gas pressure
3 - Check/replace detection electrode
4 - Check/replace control box
5 - Check/replace electrical box
FC P010a
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