elco AEROTOP SPLIT Mode D'emploi Pour L'utilisateur page 33

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 sys-
tem. Devices which may overload the
BUS network include:
- Multizone module
- Solar pump assembly
- Module for instant production of do-
mestic 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.
microswitch
1 2
(**) Table of inverter error codes
in case of an external unit error (HP 939
error code), read the parameter 17.11.1
and refer to the following table to
identify the cause of the error.
ON
OFF
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
33 / GB