Ariston GENUS Informations techniques Page 59

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PRELIMINARY CHECKS
MAKE SURE THAT:
IS
THE POWER
DISPLAY
ON?
POSTION
OF THE
SELECTOR
NO
NO
WINTERES TAT E
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
TURN ON THE ON/OFF
SWITCH
IS D.H.W.
BEING DRAWN?
IS D.H.W.
BEING DRAWN?
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active 
(
flow temp between 3C & 8C)
-PC0 continuous pump
operation selected on 
menu (see page 32)
MUST
TIME CLOCK
AND/OR ROOM
THERMOSTAT
BE ACTIVATED?
A
ECONOMY/
COMFORT
SELECTOR
TEMP.
C.H. < 42°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. < 42
°C
ECONOMY/
COMFORT
SELECTOR
YES
DOES AN ERROR CODE
APPEAR ON THE DISPLAY?
1. Check the fuses
2. Check the power supply to
the control panel
3. Check/replace the
ON/OFF button
4. Check the connection between
the main and display P.C.B.s
see section 3.6
5. Check/replace the
main and display P.C.B.s
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active 
(flow temp between 3C & 8C)
-PC0 continuous pump
operation selected on 
menu (see page 32)
7. FAULT FINDING
These fault finding guides are not exhaustive. However, it
is possible to detect and correct many defects by using
the standard fault finding diagrams described in this
chapter, ensure these guides are carried out in the set
order.
7.1 FA
ULT
FI
NDING
GU
IDE
(FLOW-CHARTS)
PRELIMINARY CHECKS
MAKE SURE THAT:
IS
THE POWER
DISPLAY
ON?
POSTION
OF THE
SELECTOR
NONO
NONO
WINTERWINTERES TAT ESUMMER
NONO
YESYES
YESYES
YESYES
YESYES
YESYES
NONO
NONO
NONO
NONO
NONO
NONO
NONO
YESYES
YESYES
YESYES
TURN ON THE ON/OFF
SWITCH
IS D.H.W.
BEING DRAWN?
IS D.H.W.
BEING DRAWN?
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active 
(flow temp between 3C & 8C)
-PC0 continuous pump
operation selected on 
menu (see page 32)
MUST
TIME CLOCK
AND/OR ROOM
THERMOSTAT
BE ACTIVATED?
A
ECONOMY/
COMFORT
SELECTOR
TEMP.
C.H. < 42°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. < 42°C
ECONOMY/
COMFORT
SELECTOR
YESYES
D
OES AN ERROR CODE
APPEAR ON THE DISPLAY?
1
. Check the fuses
2. Check the power supply to
the control panel
3
. Check/replace the
ON/OFF button
4
. Check the connection between
the main and display P.C.B.s
see section 3.6
5. Check/replace the
main and display P.C.B.s
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active 
(flow temp between 3C & 8C)
-PC0 continuous pump
operation selected on 
menu (see page 32)
T
o ensure that the external controls do
not interfere with the fault finding,
disconnect the wires from the terminal
block on the rear of the control panel and
provide a solid link between the
terminals.
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