Anti-Freeze Function - Ariston NIMBUS User Manual

Restoring operation
If the system shuts down, a code will appear on the system interface
display signalling the type of shutdown and the reason behind it.
To restore normal operation, follow the instructions provided on the
display or, if the error persists, contact an authorised Technical Service
Centre for assistance.
ERROR DESCRIPTION
1 14 Outdoor Sensor Damaged
4 20* Bus supply overload
7 01 Zone1 Send Probe Damaged
7 02 Zone2 Send Probe Damaged
7 03 Zone3 Send Probe Damaged (N/A)
7 11 Zone1 Return Probe Damaged
7 12 Zone2 Return Probe Damaged
7 13 Zone3 Return Probe Damaged (N/A)
7 22 Zone2 Overheat
7 23 Zone3 Overheat (N/A)
9 02 System fl ow sensor damaged
9 03 System return sensor damaged
9 10 HP communication error (RS 485)
9 23 Heating Circuit pressure Error
9 24 Communication error (e-BUS 2)
9 33 Overheat (>90°C)
9 34 DHW Tank sensor damaged
9 35 Tank overtemperature (>85°C)
9 36 Floor Thermostat 1 error (ST1)
9 37 No circulation error
9 38 Anode Fault
9 39 HP error
9 40 Hydraulic scheme not defi ned
9 41 Night tariff contact not defi ned
9 42 Load shedding contact not defi ned
9 44 Cooling overtemperature
9 45 Flow switch stuck
9 46 HP compressor error
2 P2 Thermal cleanse not complete
2 P3 DHW boost: comfort setpoint not reached
2 P4 fi rst thermostat of resistance (auto)
2 P5 second thermostat of resistance (manual)
2 P6 Night tariff contact not present
2 P7 Precirculation Error
2 P8 HP T° out of range
N/A = not applicable

Anti-freeze function

Your NIMBUS system is equipped with an anti-freeze function, which
checks for the outlet water temperature of the internal unit and ma-
nages the activation of the devices of the system, in case the tempe-
rature remains below 8 ° C for more than two consecutive minutes.
ATTENTION
Anti-freeze function works properly only if:
· System pressure is included between 0.6 and 3 bar
· The system is electrically supplied
In correspondence of anti-freeze function activation request, no
errors are occurring
Maintenance
The maintenance of your NIMBUS system is compulsory and indi-
spensable in order to ensure an adequate functioning, the safety of
the appliance and the duration of life of the system itself.
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