93 / GB
ERROR
DESCRIPTION
TROUBLESHOOTING
1
14
Faulty outdoor sensor
Activation of thermoregulation based on outdoor sensor and outdoor
sensor not connected or damaged
4
20*
Bus power supply overload
9
02
Faulty primary delivery sensor
Flow 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
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. 12.13.3
9
38
Anode Fault
- Check anode connection
- Check water presence in the tank
- Check anode statu
9
40
Hydraulic scheme not defi ned
Hydraulic scheme not selected by parameter 12.2.0
9
41
HIV IN1 not defi ned
Function not selected by parameter 12.1.0
9
42
HIV IN2 not defi ned
Function not selected by parameter 12.1.1
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 12.13.3
before the heat request
9
46
HP compressor error
Check the compressor’s frequency after the end of the heating re-
quest through parameter 12.14.1
9
55
Water fl ow switch
- Check the fl ow temperature sensor and return temperature sensor
placement.
9
58
Buff er temperature sensor
Buff er charge inhibited
9
59
Buff er over-temperature
Buff er charge inhibited
9
70
P2 circulator confi guration not aligned with
hydraulics.
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
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 12.1.0 o 12.1.1 is defi ned as SG Ready input
Maintenance
Internal unit error list
(*) BUS power supply overload
A BUS power supply overload error
may occur due to the connection of
three or more devices within the in-
stalled system. Devices which may
overload the BUS network include:
- Multizone module
- Solar pump assembly
-
Module for instant production of
domestic hot water
To avoid overloading the BUS pow-
If the system shuts down, a code will
appear on the system interface dis-
play signalling the type of shutdown
and the reason behind it.
To restore normal operation, follow
the instructions provided on the
display or, if the error persists, con-
tact an authorised Technical Service
Centre for assistance.
er 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 g-
ure.
1
ON
OFF
2
microswitch
