Operation - Autoclima Modula Rt Montage- Und Wartungsanleitung

Turning the selector on the first ventilation speed will activate the system (fig. 10).
It is possible to increase the speed of ventilation by turning the selector on the other 2 positions, without
changing the temperature of the outgoing air.
If you wish to change the default temperature setting, you must manually change the thermostat installed in
the roof unit (fig. 04-05) after removing its outer covering.
By rotating the thermostat's knob clockwise, the temperature decreases with respect to the default setting, and
increases if you turn it counter-clockwise.
While using the cooling unit, you may experience interruptions in its operation; these are recorded and
signalled by means of the supplied led light.
Error codes are explained in the following table:
Point Error code
1
Light is fixed
Light and electric
motor (electric
version) /
2
compressor clutch
(hydraulic version)
are cyclically on and
off
Light off but cooling
3
unit is inoperative
Cause
Low pressure in the system.
The pressure switch (for low pressure) is calibrated so as to
activate when pressure falls under 2 bar; this happens
when there is a low amount of coolant (for example in case
of a leak) or when the outside temperature is less than 5°C.
High pressure in the system.
The pressure switch (for high pressure) is calibrated so as
to activate at a pressure exceeding 14 bar; this happens
when there is an excessive amount of coolant, a blockage
in the cooling circuit or when the condenser is not correctly
ventilated.
The cooling unit is not working but the led light is not
signalling it.
This may be due to electrical/hydraulic problems.
ENGLISH

OPERATION

Solution
Have a specialized technician check that the unit's circuit is
sealed and reload with R134a.
Have a technician check that there is not an excessive
amount of coolant (R134a) in the system, that there are no
blockages, grime on the condenser or condenser fans
malfunction (check the fuses).
Check if the led light is correctly working. Check fuses,
relays, electrical wiring and connections.
Check hydraulic circuit.
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