Ariston NIMBUS HYBRID MODULE UNIVERSAL NET, Manual, Page: 91 / 94

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TABLE HYBRID ERROR CODES
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 TROUBLESHOOTING
1 14 Faulty outdoor sensor
Activation of thermoregulation based on outdoor sensor and outdoor
sensor not connected or damaged
4 20* Bus power supply overload
9 02 Faulty primary delivery sensor Flow sensor not connected or damaged
9 10 HP communication error
- Check the wiring connection of the modbus cable.
- Red led on TDM not blinking-> change TDM control board
9 24
Ebus Communication error between EM and
TDM
- Check wiring connection between TDM end Energy Manager
9 33 Overheat - Check water fl ow of the heating circuit
9 34 DHW Tank sensor damaged - DHW tank sensor not connected or damaged
9 35 Tank overtemperature - Check 3-way valve (DIV1) blocked in DHW position
9 36 Floor Thermostat 1 error - Check water circulation of the underfl oor zone
9 37 No circulation error
- Check main circulation activation
- Check water fl ow sensor detection by par. 12.13.3
9 38 Anode Fault
-Check anode connection
- Check water presence in the tank
- Check anode statu
9 40 Hydraulic scheme not defi ned Hydraulic scheme not selected by parameter 12.2.0
9 41 HIV IN1 not defi ned Function not selected by parameter 12.1.0
9 42 HIV IN2 not defi ned Function not selected by parameter 12.1.1
9 44 Cooling overtemperature Check water fl ow of the cooling circuit
9 45 Flow switch stuck
- Check if main circulation is active before the heat request
- Check the water fl ow detection by water fl ow sensor see 12.13.3
before the heat request
9 46 HP compressor error
Check the compressor’s frequency after the end of the heating
request through parameter 12.14.1
9 55 Water fl ow switch
Check the fl ow temperature sensor and return temperature sensor
placement.
9 58 Buff er temperature sensor Buff er charge inhibited
9 59 Buff er over-temperature Buff er charge inhibited
9 70
P2 circulator confi guration not aligned with
hydraulics.
Warning displayed for 30 seconds and stored in the historical
2 P2 Antilegionella not completed
Antilegionella setpoint temperature not reached in 6 hours
- Check DHW tapping during antilegionella cycle
- Check fl ow temperature during antilegionella cycle
- Check heating resistors activation
2 P7 Precirculation Error Water fl ow not detected for 5 times during pre-circulation
2 P9 SG ready input confi guration not completed Just one of par 12.1.0 o 12.1.1 is defi ned as SG Ready input
(*) 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.
1
ON
OFF
2
microswitch