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5. MALFUNCTIONS
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!
Unit
Description
behaviour
44 – Fan
Unit
error
out of order
45 – Mandatory
Unit
maintenance/filter
operational
clogged
46 – Heater
Unit
malfunction
out of order
65 – Communication
Unit out of
error
order
Unit's not working
Unit
out of order
The heating swit-
Unit
operational
ches off automati-
but not
cally
heating
ATTENTION!
Switch off the main power supply before any intervention inside the unit. Let the unit cool!
10
ver.1 28-01-20
Likely problem
Overheated fan or defect on
thermal contact of inlet fan
Filter clogged or the time to
replace it has come
Heater malfunction
Communication error
Power supply interrupted
Cracked fuse
The heater overheats
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Solution
Determine the cause of the overheating (defective
bearing, short-circuit...) or replace the motor.
Replace filters. After replacing, do not forget to
reset the MENU 1616 – FILTER TIMER
Check the heater and the condition of the safety
thermostat Does the heater have proper cooling?
Check engine running.
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)
Check that the power supply is not interrupted
Check the fuse in side the control module
The heater overheats due to insufficient air flow.
Check that the ventilators are in good order and
that the air supply is not disrupted.
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