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Idiomas disponibles
Idiomas disponibles
Operation
2 - OPERATION
2.1 - OPERATION GENERAL INFORMATION
Spheros air conditioner controllers are usually installed on the driver's
instruments dash. The controllers are composed of a display and a keyboard,
used to operate the equipment.
The display shows the operator the number regarding the internal tempera-
ture of the vehicle.
It is also used to visualize the operation status and programming the Set-
Point* temperature.
The internal temperature is detected by a temperature sensor located at
the (see item 3.1)
Important: the air conditioner will only work when the vehicle's engine is
on. It's always recommended to turn the air conditioner off before turning
off the vehicle.
Note: Before turning on the air conditioner verify the conditions of the com-
pressor belts, located together to the vehicle's engine (see item 3.1)
2.1.1 - TURNING THE CONDENSER ON
The condenser engines, as well as the compressor, will only be activated
when the air conditioner is working on the "Cooling Mode".
* Set-point – is the temperature figure which is desired inside the vehicle, adjusted by the operator (driver).
** Pressure Switch – safety device that protects the components from the air conditioning system
against high and low pressure.
2.1.2 - TURNING THE EVAPORATOR ON
The velocity control from the evaporator blower is automatically adjusted
according to the temperature programmed and the temperature inside the vehi-
cle.
When the internal temperature reaches close to set-point, the velocity of the blower
is reduced and when the internal temperature gets distant from set-point, the velocity
of the blower increases automatically.
For equipment installed in city line vehicles, where the cooling need is greater, the
ventilation works only on high velocity.
2.1.3 - TURNING THE COMPRESSOR ON
The compressor operates only on "Cooling Mode", and will start operation 10
seconds after the condenser is turned on.
For safety reasons the controllers present a time histeresis set in 30sec. to restart
the compressor every time it is turned off.
2.1.4 - PROTECTION SYSTEM
The devices are equipped with an electrical system that monitors its work pressures.
The pressure switch** performs this monitoring.
When a failure in the equipment occurs and the work pressures suffer any altera-
tion, the controller receives a signal from the pressure switch and the display will
show a failure code (see failures on item 2 – Operation). For safety reasons, the
compressor will be automatically turned off.
Note: The working pressures are constantly monitored even when the air
conditioner is off.
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