GB / 25
ERROR DESCRIPTION TROUBLESHOOTING
1 14 Outdoor Sensor Damaged
Activation of thermoregulation based on outdoor sensor and outdoor
sensor not connected or 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
9 02 System fl ow sensor damaged Flow sensor not connected or damaged
9 03 System return sensor damaged Return 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 23 Low pressure error
Check water leakage of the hydraulic circuit
- Water pressure switch damaged
- Wiring of water pressure switch damaged
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. 17.11.3
9 38 Anode Fault
Check anode connection
- Check water presence in the tank
- Check anode status
9 40 Hydraulic scheme not defi ned - Hydraulic scheme not selected by parameter 17.2.0
9 41 HIV IN1 not defi ned Function not selected by parameter 17.1.0
9 42 HIV IN2 not defi ned Function not selected by parameter 17.1.1
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 par. 17.11.3)
before the heat request
9 55 Water fl ow switch
Check the fl ow temperature sensor and return temperature sensor
placement.
958 Bu er temperature sensor Bu er charge inhibited
959 Bu er over-temperature Bu er charge inhibited
970
P2 circulator confi guration not aligned with
hydraulics. Check for auxiliary pump confi guration
Warning displayed for 30 seconds and stored in the historical
9 71 External unit Version undefi ned 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 P3 DHW boost: comfort setpoint not reached
DHW comfort setpoint not reached during boost cycle.
- Check DHW tapping during boost cycle
- Check fl ow temperature during boost cycle
- Check heating resistors activation
2 P4 First thermostat of resistance (auto)
- Check main circulation activation
- Check water fl ow by par 17.11.3
- Check safety thermostat status and wirings
2 P5 Second thermostat of resistance (manual)
Check main circulation activation
- Check water fl ow by par 17.11.3
- Check safety thermostat status and wirings
2 P6 Night tari contact not present - Par 17.5.2 = HP-HC or HP-HC 40°C and par. 17.1.0 = Absent
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 17.1.0 or 17.1.1 is defi ned as SG Ready input
INTERNAL UNIT ERROR LIST
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