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Beschikbare talen
Beschikbare talen
Maintenance
Internal unit error list
2
P3
DHW boost: comfort setpoint not reached
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 system. Devices which may overload the BUS net-
work 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 illustrat-
ed in the fi gure.
EXTERNAL UNIT ERROR LIST
DESCRIPTION
906
HP FAN Mismatch Error
907
HP V4W Mismatch Error
908
HP EXV Mismatch Error
909
HP Zero Fan Speed
911
HP TE Error
912
HP V4W Error Service
913
HP LWT Error
914
HP TR Error
915
TDM Communication error
916
HP TEO Error
917
HP Freeze Service
918
Pump Down Error
919
HP HIGH SDT Error
922
HP Freeze Error
931
Errore inverter *
947
HP V4W Error
948
HP TD Error
949
HP TS Error
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
- 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
950
HP HIGH TD Service
RESET
950
HP HIGH TD Service
952
HP TO Error
953
HP Compressor Heater Mismatch
954
HP Base Panel Heater Mismatch
956
HP Compressor model mismatch
957
HP Fan model mismatch
x
960
HP EWT sensor Error
x
962
Defrost Energy
x
* Parameter 17.11.1 shows the last inverter error shown in the
x
table opposite «Inverter error list».
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Legend:
x
HP
Heat pump
--
--
CMP
compressor
--
--
4WV
4 way valve
--
--
EXV
Expansion valve
--
--
TD
Discharge temperature sensor
--
x
TE
Evaporator temperature sensor
--
--
TS
Suction temperature sensor
TR
Refrigerant temperature sensor
x
TO
Outdoor temperature sensor
x
LWT
Leaving water temperature
--
--
EWT
Entering water temperature
x
TDM
Thermodynamic module, external unit control board
--
--
SDT
Saturated discharge temperature sensor
--
--
TEO
Auxiliary Evaporator temperature sensor
ON
OFF
1
2
microswitch
--
--
--
--
--
--
--
--
--
33 / GB
x
x
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--
--
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