93 / GB
2
P4
First thermostat of resistance (auto)
- Check main circulation activation
- Check water flow by par 17.11.3
- Check safety thermostat status and wirings
2
P5
Second thermostat of resistance (manual)
Check main circulation activation
- Check water flow by par 17.11.3
- Check safety thermostat status and wirings
2
P6
Night tariff 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 flow not detected for 5 times during pre-circulation
2
P9
SG ready input configuration not completed
Just one of par 17.1.0 or 17.1.1 is defined 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 system. Devices which may overload the BUS network in-
clude:
- 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 in-
side the equipment connected to the system (except the Tank) to OFF, as illustrated in
the figure.
1
ON
OFF
2
microswitch
EXTERNAL UNIT ERROR LIST
ERRORE TDM
DESCRIPTION
RESET
HP PO
WER OFF
SER
VICE RESET
906
HP FAN Mismatch Error
x
907
HP V4W Mismatch Error
x
908
HP EXV Mismatch Error
x
909
HP Zero Fan Speed
x
911
HP TE Error
--
--
912
HP V4W Error Service
x
913
HP LWT Error
--
--
914
HP TR Error
--
--
915
TDM Communication error
--
--
916
HP TEO Error
--
--
917
HP Freeze Service
--
x
918
Pump Down Error
--
--
919
HP HIGH SDT Error
x
922
HP Freeze Error
x
931
Errore inverter *
--
--
947
HP V4W Error
x
948
HP TD Error
--
--
949
HP TS Error
--
--
950
HP HIGH TD Service
--
x
950
HP HIGH TD Service
--
x
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
--
--
960
HP EWT sensor Error
--
--
962
Defrost Energy
--
--
* Parameter 17.11.1 shows the last inverter error shown in the
table opposite «Inverter error list».
