THERMO 2000 VENTUM, Installation And Operation Manual, Page: 28 / 34

VENTUM HYDRONIC AIR-HANDLER Installation and Operation Manual (Revised: June 2021)
28
•
Check the fan connections.
•
Check that there are no
major obstructions in the
ventilation network.
•
Confirm whether the
display shows the fan in
operation (fan symbol and
number representing the
air flow).
4
Faulty hydronic
air-handler air
outlet temperature
sensor.
The sensor is sending an error
code to the controller.
•
Check the sensor
connections.
•
Change the sensor.
5
Faulty hydronic
air-handler unit air
inlet temperature
sensor.
The sensor is sending an error
code to the controller.
•
Check the sensor
connections.
•
Change the sensor.
6
Faulty radiator
water outlet
temperature
sensor.
The sensor is sending an error
code to the controller.
•
Check the sensor
connections.
•
Change the sensor.
7
Return air too hot
in heating mode.
The air returning to the device is
too hot while a demand for heating
is in progress.
•
Check that the thermostat
is functional.
•
Check if a heat source in
the mechanical room emits
an excessive amount of
heat.
8
Freezing
protection mode in
progress.
The ambient air is too cold and
there is no demand for heating.
•
Check that the thermostat
is functional.
•
Check the ambient
temperature of the
mechanical room (poor
insulation, door open in
winter, etc.)
NA Noisy pump. There is air in the system. Purge air from the system properly.
NA
Not enough or no
hot air in the
rooms in heating
mode.
The filter is clogged or dirty. The air
flow is no longer sufficient
•
Change the filter
•
Check whether there is
another cause of a
blockage.
The heat source is off or is faulty.
•
Check the power supply to
the heat source.
•
Troubleshoot the heat
source according to the
manufacturer's
recommendations.
There is no water flow.
•
Check if the pump icon
appears on the controller.
•
If not, check that the
configuration of the O or B
signal is correct and that
the thermostat sends the
required signals depending
on the configuration.
•
If so, check the pump
power supply or if a
blockage is created.