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Start-up
10. Start-up
Preliminary warnings
For system conguration, of advanced features, refer to
the user interface manual.
When the unit is turned on, nothing is displayed on the
user interface.
Check the following anomalies before diagnosing pos-
sible error codes:
• electrical connection problem (power supply or
communication signal)
• fuse failure on main electronic board
Error code "E8" or "E0" is displayed on the user interface:
• there is air in the system
• water pressure in the system is insufficient
• the water flow rate in the system is insufficient
Before starting the test run, make sure that the water
system and the storage tank are full of water and that the
air has been vented. Otherwise the system components
could suer irreversible damage.
Error code "E2" is displayed on the user interface:
• check the wiring between the user interface and the
unit
Initial start-up at low outside temperature:
• for the initial start-up when the outside temperature
is low, the water should be heated gradually
• use the underfloor preheating function
Refer to the user interface manual for operation.
For radiant panel systems
If the temperature rises abruptly in a short time, the oor
could suer irreversible damage.
During start-up, the following checks must be carried out:
1 Function test of actuators
2 Air vent
3 Test of operating modes
4 Minimum water flow control in all conditions
10.1 Opening the “For serviceman” menu
To access:
► press + for 3 seconds
► enter the password and confirm
To nd out the password, refer to the service manual or
contact the manufacturer.
After modifications:
► press
○ the confirmation page is displayed
► select YES
10.2 Function test of actuators
Verify proper operation of the actuators.
During the operation test of the actuators, the unit pro-
tection function is disabled.
Excessive use of the test can damage the components.
List of actuators
Parameter Description
AHS Backup boiler
IBH Backup electric heater
P_i
Unit pump or Zone 1 pump (for double
zone systems)
P_o
Secondary circuit pump (or Zone 1 pump
for double zone systems)
P_c Zone 2 pump (for double zone systems)
P_d DHW recirculation pump
P_s Solar circuit pump
SV1 3-way circuit/DHW diverter valve
SV2
2-way diverter valve for direct double zone
systems
SV3 3-way mixing valve for mixed circuit
TBH
Backup electric heater for DHW (Domestic
Hot Water) storage tank
To verify the actuators:
► access the "For serviceman" menu
► select “Test run”
► press OK
► select “Check point”
► press OK
► select the Actuator to be verified
► press OK to activate the actuator
○ the state of the actuator becomes ON
► press OK to deactivate the actuator
○ the state of the actuator becomes OFF
When exiting the function, the actuators are automatical-
ly set to OFF.
10.3 Air vent
Activates the vent cycle that removes air in the hydraulic
circuit that can cause unit malfunction.
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