Ariston NIMBUS COMPACT M NET 40 M EXT Technical Instructions For Installation And Maintenance page 85

2 P4 First thermostat of resistance (auto)
2 P5 Second thermostat of resistance (manual)
2 P6 Night tariff contact not present
2 P7 Precirculation Error
2 P9 SG ready input confi guration not completed
(*) BUS power supply overload
A BUS power supply overload error may occur due to the connection of three or more devices within the installed sys-
tem. Devices which may overload the BUS network include:
- Multizone module
- Solar pump assembly
- Module for instant production of domestic hot water
To avoid overloading the BUS power supply, set microswitch 1 on one of the P.C.B.s inside the equipment connected to
the system (except the Tank) to OFF, as illustrated in the fi gure.
- Check main circulation activation
- Check water fl ow by par 17.11.3
- Check safety thermostat status and wirings
Check main circulation activation
- Check water fl ow by par 17.11.3
- Check safety thermostat status and wirings
- Par 17.5.2 = HP-HC or HP-HC 40°C and par. 17.1.0 = Absent
Water fl ow not detected for 5 times during pre-circulation
Just one of par 17.1.0 or 17.1.1 is defi ned as SG Ready input
ON
OFF
1 2
microswitch
85 / GB