2VV Superior Master - Page 15

5. MALFUNCTIONS
5.1 MALFUNCTIONS
Disconnect the main power supply before any intervention to the unit. If you are not sure of the correct steps, do not
attempt to perform any repairs and call a professional service!
Description
Unit
behaviour
Likely problem Solution
44 – Fan
error
Unit
out of order
Overheated fan or defect on
thermal contact of inlet fan
Determine the cause of the overheating (defective
bearing, short-circuit...) or replace the motor.
Check the thermal contacts from the motor to the
regulator.
45 – Mandatory
maintenance/lter
clogged
Unit
operational
Filter clogged or the time to
replace it has come
Replace lters. After replacing, do not forget to
reset the MENU 1616 – FILTER TIMER
46 – Heater
malfunction
Unit
out of order
Heater malfunction Check the heater and the condition of the safety
thermostat Does the heater have proper cooling?
Check engine running.
47 - malfunction
in external
temperature sensor
(45,46)
Unit
out of order
Temperature sensor malfunction
on terminals 45,46
Check that the sensor is correctly connected to
the electronics or test it measuring its resistance
(the resistance value at +20°C is around 10kW)
48 – Outlet
temperature sensor
malfunction (49,50)
Unit
out of order
Temperature sensor malfunction
on terminals 49,50
Check that the sensor is correctly connected to
the electronics or test it measuring its resistance
(the resistance value at +20°C is around 10kW)
49 – Inlet
temperature sensor
malfunction (51,52)
Unit
out of order
Temperature sensor malfunction
on terminals 51,52
Check that the sensor is correctly connected to
the electronics or test it measuring its resistance
(the resistance value at +20°C is around 10kW)
60 – Exchanger’s
return sensor
malfunction (53,54)
Unit
out of order
Temperature sensor malfunction
on terminals 53,54
Check that the sensor is correctly connected to
the electronics or test it measuring its resistance
(the resistance value at +20°C is around 10kW)
61 – Room
temperature sensor
malfunction (55,56)
Unit
out of order
Temperature sensor malfunction
on terminals 55,56
Check that the sensor is correctly connected to
the electronics or test it measuring its resistance
(the resistance value at +20°C is around 10kW)
62 - malfunction in
external temperature
sensor from BMS
Limited
operation of
the device
Temperature sensor malfunction
in BMS
Check that in the BMS that the address where the
sensors sends the data is properly set
(on the right regulator) Check the function of the
sensor in the BMS
63 - malfunction in
room temperature
sensor from BMS
Limited
operation of
the device
Temperature sensor malfunction
in BMS
Check that in the BMS that the address where the
sensors sends the data is properly set
(on the right regulator) Check the function of the
sensor in the BMS
79 – Heating
reduced due to low
air ow
Unit
operational
Only information The air ow settings were reduced, limiting the
heater output to prevent overheating
65 – Communication
error
Unit out of
order
Communication error Check the communication cable for damages
and if it is properly connected Observe the
wiring diagram to prevent occurrences that may
disrupt communication (wiring near high tension,
phenomena on site causing disruptions)
Unit’s not working Unit
out of order
Power supply interrupted Check that the power supply is not interrupted
Cracked fuse Check the fuse in side the control module
The heating swit-
ches o automa-
tically
Unit
operational
but not
heating
The heater overheats The heater overheats due to insucient air ow.
Check that the ventilators are in good order and
that the air supply is not disrupted.