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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 - CHECK THE FUSES
2 - CHECK THERE IS POWER
SUPPLIED TO THE
P.C.B.S
3 - CHECK/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)
PRESS THE
ON
/OFF BUTTON
PRESS 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 - THERE IS SUFFICIENT
WATER IN THE SYSTEM
2 - THE GAS IS TURNED ON
3 - THE 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 FAULT FINDING GUIDE
(FLOW-CHARTS)
FC002Aa