Carrier 42N S-Serie Installations- Und Bedienanweisungen Seite 23

Controls
Use
ON/OFF/fan speed selector
OFF In this position the control is OFF and all functions are disabled.
If the frost protection function is selected by the dip-switch, this
is activated even if the control is in OFF position.
With selector in this position, the fan operates at low speed.
With selector in this position, the fan operates at medium speed.
With selector in this position, the fan operates at high speed.
AUTO The control maintains the selected temperature, acting
automatically on the fan speed.
Temperature selector
Its purpose is to maintain the temperature at the desired level.The
reference value at the centre of the range is 20°C .
By turning the knob towards the symbol (–) the temperature is reduced
from the original setting (minimum value is 10°C).
By turning the knob towards the symbol (+), the temperature is raised
from the original setting (maximum value is 30°C).
Seasonal changeover button
This button allows selecting the operating mode, cooling, heating or
automatic (the last function is only possible with type "B" control).
If the sensor for centralised changeover is connected, this button is
disconnected (only on type "A" control).
Energy saving button
This button activates the energy saving function which modifies room
temperature as follows: in heating, the selected temperature is reduced
by 4°C; in cooling, the selected temperature is raised by 4°C.
Light indicators
Blue LED
ON cooling mode ( ).
Flashing frost protection mode ( ).
Red LED
ON heating mode (
Flashing Presence of a fault (sensor failed or not
connected).
Yellow LED (A ) (only 4-pipe versions)
ON automatic mode (A).
Blue LED + Yellow LED
Both ON automatic mode (A) - cooling ( ).
Red LED + Yellow LED
Both ON automatic mode (A) - heating (
Yellow LED ( )
ON energy saving mode .
Flashing External contact is open.
Red LED / Blue LED
Flashing "Autotest" mode.
).
).
Dip-switch functions (See fig.34)
Dip-switch No. 1
When ON permits enabling the frost
protection ( ) function.
OFF Frost protection ( ) disabled.
ON Frost protection ( ) enabled.
Dip-switch No. 2
When ON permits fan operation at the selected speed even if the set
point is satisfied.
OFF Ventilation controlled by thermostat.
ON Continuous ventilation.
Dip-switch No. 3
When ON in cooling ( ) mode, restricts the range of temperature
selection, according to the following limits:
Cooling: minimum selectable temperature: 25°C.
Heating: maximum selectable temperature: 20°C.
OFF Temperature block disabled.
ON Temperature block enabled.
Dip-switch No. 4
When ON periodically activates the fan even if the set point is satisfied
(air sampling).
OFF "Air sampling" disabled.
ON "Air sampling" enabled.
Dip-switch n° 5
OFF "Booster Heating" disabled.
ON "Booster Heating" enabled.
NOTE:
Factory setting is with all dip-switches in the OFF position.
Use of temperature sensor (See fig. 35)
Internal sensor:
This is used in all installations where the control is wall-mounted.
To activate it, close jumper JP1 as shown in figure 35.
Remote sensor:
This is used on all installations with unit-mounted control. It is
positioned on the return air, close to the fan.
To activate it, close jumper JP1 as shown in figure 35.
NOTE:
Factory setting is with activated remote sensor.
42N_S 42N_E
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