Ariston NIMBUS M NET User Manual

Initial start-up
31 / EN
Code Description Resolution
936 Under-floor heating thermostat error Check the flow of the under-floor system. Check the connection of the
thermostat on the IN-AUX2 STE terminal of the Energy Manager and/or STT of
the TDM. If the thermostat of the under-floor system is not present, apply an
electrical jumper to terminal IN-AUX2 STE of the Energy Manager and/or STT
of the TDM.
937 No circulation error Check that the main circuit has activated
938 Anode fault Check the connection of the anode
Check whether there is any water in the indirect cylinder
Check the condition of the anode
Check the configuration of parameter 1.2.6
940 Hydraulic scheme not defined Hydraulic diagram not selected through parameter 1.1.0
955 Water flow check error Check the connection of the flow and return temperature sensors
970 Undefined split / mono config. Check the configuration of parameter 1.2.5
2P2 Thermal cleanse not complete Sanitisation temperature not reached in 6 h:
Check the drawing of domestic hot water during the thermal sanitisation
cycle
Check the activation of the heating element
2P3 DHW setpoint not reached in boost Domestic hot water set-point temperature not reached during the boost
cycle
Check the drawing of domestic hot water during the DHW boost cycle
Check the activation of the heating element
2P4 Electr. heater thermos. (manual) Check the activation of the main circulation pump
Check the flow with the reading of the flow meter through parameter 13.9.3
Check the condition of the safety thermostat and of the cabling
2P5 Electr. heater thermostat (auto) Check the activation of the main circulation pump
Check the flow with the reading of the flow meter through parameter 13.9.3
Check the condition of the safety thermostat and of the cabling
2P7 Precirculation error Check the connection of the flow meter
Run an automatic deaeration cycle 1.12.0
2P8 Low pressure warning Check for any water leakages in the hydraulic circuit
Faulty pressure switch
Defective cabling of the pressure switch. Check the connection of the
pressure switch and replace it, if necessary.
2P9 SG ready input config. err. Only one of the parameters 1.1.0 or 1.1.1 is set as an SG Ready input

Ariston NIMBUS M NET Specifications

General

Type	Air-to-Water Heat Pump
Refrigerant	R32
Power Supply	Electric
Power Supply Voltage	230 V
Connectivity	Wi-Fi
Heating Capacity	6 kW