16
B063
2.
FAULT FINDING
P
RELIMINARY CHECKS
MAKE SURE THAT
:
IS
THE SUPPLY
L.E.D. ILLUMINATED?
IS
THE L.E.D.
ILLUMINATED?
NO
NO
NO
YES
NO
1 - C
HECK THE FUSES
2 - C
HECK THERE IS POWER
SUPPLIED TO THE
P.C.B.
S
3 - C
HECK
/
REPLACE THE
P.C.B.
(CT1)
1 - C
HECK THE INTEGRITY
OF THE
L.E.D.
2 - C
HECK
/
REPLACE THE
P.C.B.
(CT1)
P
RESS THE
ON
/
OFF BUTTON
P
RESS THE CENTRAL
HEATING BUTTON
FROST
PROTECTION IS
ACTIVATED <5¡C. IS THE
FROSTPROTECTION
REQUESTED?
IS
TIME CLOCK/
PROGRAMMER
AND/OR ROOM
CALLING FOR
HEATING?
THE
THERMOSTAT
A
1 - T
HERE IS SUFFICIENT
WATER IN THE SYSTEM
2 - T
HE GAS IS TURNED ON
3 - T
HE ELECTRICAL SUPPLY
IS TURNED ON
YES
YES
YES
It is possible to detect and correct any defect by using the standard fault
finding diagrams described in this chapter.
2.1
F
AULT
F
INDING
G
UIDE
(F
LOW
-
CHARTS
)
FC002Aa