Ariston ecoCOMBI 27 MFFI Installation And Servicing Instructions page 53

Model 27 RFFI System
C.H. ONLY
SELECTOR
ON/OFF
ON (green L.E.D. on):
cylinder excluded
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(- flow temp. < 5°C
- outdoor temp. < -3°C (outdoor sensor optional)
- Jumper 4 selects the pump
for continuous
operation)
NO
THERE IS NO CALL FOR PUMP OPERATION
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 THE ON/OFF KNOB
TO WINTER OR SUMMER POSITION
YES
DOES A STOP CODE
TABLE
APPEAR ON THE DISPLAY?
I and II
SUMMER
OFF (green L.E.D. off):
cylinder active
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.
NO
YES
IS THE
DISPLAY ON?
OFF (green L.E.D. off):
cylinder active
The
C.H. flow
temperature
is lower than 80°C
YES YES
and the temperature of the
cylinder is at least 5°C
below the one
selected.
NO
YES
YES
- outdoor temp. < -3°C (outdoor sensor optional)
A
NO
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
5. Check/replace the
main and display P.C.B.s
WINTER WINTER
C.H. ONLY
SELECTOR
ON/OFF
ON (green L.E.D. on):
cylinder excluded
MUST
THE TIME CLOCK
AND/OR ROOM THERMOSTAT
BE ACTIVATED?
NO
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(- flow temp. < 5°C
- Jumper 4 selects the pump
for continuous
operation)
NO
THERE IS NO CALL FOR PUMP OPERATION
53