61
PRELIMARY CHECKS
MAKE SURE THAT:
IS
THE POWER
L.E.D.
ON?
ESTAT E
NO
NO
YES
YES
1 - Check the fuses
2 - Check the power supply
cable, plug and outlet
3 - Check/replace the power
supply to the P.C.B.
4 - Check/replace the P.C.B
TURN THE SELECTOR
KNOB TO
TURN THE CH
CONTROL KNOB TO MAX
1 - There is sufficient water in
the system
2 - The gas is turned on
3 - The electrical supply is
turned on
IS DHW BEING
DRAWN
YES
YES
YES
YES
TURN THE DHW
CONTROL KNOB TO MAX
AND PUSH ON COMFORT
BUTTON
NO
NO
NO
NO
NO
NO
YES
YES
IS CLOCK TURNED
ON AND THE ROOM
THERMOSTAT
TURNED UP
NO
NO
YES
YES
FC P012
A
It is possible to detect and correct defects by using the standard fault finding diagrams described in this chapter.
N
OTE
: T
HESE CHECKS ARE NOT EXHAUSTIVE
.
19. FAULT FINDING GUIDE (Flow-chart)