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18
B063
2. FAULT FINDING
PRELIMARY CHECKS
MAKE SURE THAT:
IS
THE POWER
L.E.D.
ON?
POSTION
OF THE
SELECTOR
NO
NO
WINTERES TAT ESUMMER
NONO
YESYES
YESYES
YESYES
YESYES
YESYES
NONO
NONO
NONO
NONO
NONO
NONO
NONO
YESYES
YESYES
YESYES
1 - Check the fuses
2 - Check the power supply
cable, plug and outlet
3 - Check/replace the power
supply to the P.C.B.
TURN ON THE ON/OFF
SWITCH
D.H.W. IS
BEING DRAWN?
D.H.W. IS
BEING DRAWN?
FOR BOILERS
WITH ELECTRONIC
ANTI-FROST DEVICE:
PROTECTION IS ACTIVATED
IF HEATING TEMP
IS < 5
°
C
FOR BOILERS
WITH ELECTRONIC
ANTI-FROST DEVICE:
PROTECTION IS ACTIVATED
IF HEATING TEMP
IS < 5
°
C
MUST
TIME CLOCK
AND/OR ROOM
THERMOSTAT
BE ACTIVATED?
A
ECONOMY/
COMFORT
SELECTOR
TEMP.
C.H. < 34°C
Comfort
Comfort
Economy
Economy
1 - There is sufficient water in
the system
2 - The gas is turned on
3 - The electrical supply is
turned on
1 - Check/reset system
pressure
2 - Check/restore gas
supply
3 - Check/replace short-
circuited heating probe
4 - Check/replace siezed
pump
1 - Check/reset the
system pressure
2 - Check/restore
gas supply
3 - Check/replace short-
circuited heating probe
4 - Check/replace
siezed pump
TEMP.
C.H. < 34°C
ECONOMY/
COMFORT
SELECTOR
It is possible to detect and correct any defect by using the standard fault
finding diagrams described in this chapter.
2.1 FAULT FINDING GUIDE
(FLOW-CHARTS)
FC004Aa