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2.
FAULT FINDING
2.1
F
F
G
AULT
INDING
(F
-
)
LOW
CHARTS
Economy
BEING DRAWN?
1 - Check/reset system
pressure
2 - Check/restore gas
supply
3 - Check/replace short-
circuited heating probe
4 - Check/replace siezed
pump
FOR BOILERS
WITH ELECTRONIC
ANTI-FROST DEVICE:
NO
PROTECTION IS ACTIVATED
IF HEATING TEMP
18
Supplied By www.heating spares.co Tel. 0161 620 6677
It is possible to detect and correct any defect by using the standard fault
UIDE
finding diagrams described in this chapter.
PRELIMARY CHECKS
MAKE SURE THAT:
1 - There is sufficient water in
the system
2 - The gas is turned on
3 - The electrical supply is
turned on
TURN ON THE ON/OFF
SUMMER
ESTAT E
ECONOMY/
Comfort
COMFORT
SELECTOR
TEMP.
C.H. < 34°C
NO
NO
NO
NO
D.H.W. IS
YES
YES
NO
NO
YES
YES
IS < 5 ° C
SWITCH
IS
THE POWER
NO
NO
L.E.D.
ON?
1 - Check the fuses
YES
YES
2 - Check the power supply
cable, plug and outlet
3 - Check/replace the power
supply to the P.C.B.
POSTION
WINTER
OF THE
SELECTOR
Comfort
TEMP.
C.H. < 34°C
YES
YES
YES
YES
NO
NO
YES
YES
BEING DRAWN?
AND/OR ROOM
YES
YES
THERMOSTAT
BE ACTIVATED?
FOR BOILERS
WITH ELECTRONIC
ANTI-FROST DEVICE:
YES
YES
PROTECTION IS ACTIVATED
IF HEATING TEMP
A
ECONOMY/
COMFORT
SELECTOR
NO
NO
Economy
D.H.W. IS
NO
NO
MUST
TIME CLOCK
1 - Check/reset the
system pressure
NO
NO
2 - Check/restore
gas supply
3 - Check/replace short-
circuited heating probe
4 - Check/replace
siezed pump
NO
IS < 5 ° C
FC004Aa
B063