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20
YES
NO
MAKE SURE THAT:
1. There is sufficient water in the system
2. The gas is turned on
3. The electrical supply is turned on
PUSH THE ON/OFF
BUTTON TO ON
IS THE
POWER L.E.D. AND
DISPLAY ON?
DOES A STOP CODE
APPEAR ON THE DISPLAY?
POSITION OF THE SUMMER/
WINTER SELECTOR
SUMMER
WINTER
NO
YES
ON/OFF button
5. Check/replace the
1. Check the fuses
2. Check the power supply to
3. Check/replace the
4. Check the connection between
main and display P.C.B.s
the control panel
the main and display P.C.B.s
I and II
TABLE
SELECTOR
C.H. ONLY
ON/OFF
ON/OFF
C.H. ONLY
SELECTOR
The
C.H. flow
temperature
is lower than 80°C
and the temperature of the
cylinder is at least 5°C
below the one
selected.
The
C.H. flow
temperature
is lower than 80°C
and the temperature of the
cylinder is at least 5°C
below the one
selected.
ON (green L.E.D. on):
cylinder excluded
ON (green L.E.D. on):
cylinder excluded
NO
NO
YES
YES
YES
NO
OFF (green L.E.D. off):
cylinder active
OFF (green L.E.D. off):
cylinder active
MUST
THE TIME CLOCK
AND/OR ROOM THERMOSTAT
BE ACTIVATED?
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(- flow temp. < 3°C
- outdoor temp. < -3°C (outdoor sensor optional)
- Jumper 4 selects the pump
for continuous
operation)
BUILT-IN
ELECTRONIC
THERE IS NO CALL FOR PUMP OPERATION
YES
NO
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(- flow temp. < 3°C
- outdoor temp. < -3°C (outdoor sensor optional)
- Jumper 4 selects the pump
for continuous
operation)
THERE IS NO CALL FOR PUMP OPERATION
A
Model 24 RFFI System