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 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 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
RESET
HP POWER OFF
SERVICE 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 -- --
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 -- --
* Parameter 17.11.1 shows the last inverter error shown in the
table opposite «Inverter error list».
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