Vector TEF Manual - page 3
PI Thermostat TEF
V1.3a, 20100504
© Vector Controls GmbH, Switzerland
Page 3/8
Subject to alteration
Display and Operation
Legend
1. Status LED for temperature control mode. Green = Cooling, Red = Heating,
Orange = setpoint or parameter menu active.
2. Status LED for analog control mode. Green = Input is equal to setpoint, Red = Input is not equal to
setpoint, Orange = setpoint or parameter menu active.
3. Buttons for operating the unit:
☼
POWER button, switches the controller on or off
UV
UP and DOWN buttons, change setpoints and parameters.
T
LEFT button, Activates analog control mode or
acts as ESC if in parameter menu.
RIGHT button, Activates temperature control mode, Heat / Cool change or
acts as ENTER if in parameter menu
4. Numerical LED display with 2 digits. Indication of current value or setpoint
Display
The TEF controller features a two digit number display and two dual colors status-LED.
Power Failure
All the parameters and set points are memorized and will not have to be reentered. The unit will return to the
operation mode it was in before the power failure. I required the unit would perform a reset cycle after
resuming of power supply. A reset is necessary if the unit was in operation during power failure. The actuator
position would then be lost and has to be regenerated. The controller assumes it is in the fully open position at
the return of power, completely close the actuator and then return to the mode of operation and setpoint it was
in before the power failure.
Frost Protection
The controller will activate if the temperature drops below 10°C (50°F). It will control the environmental
temperature up to 15° C (59° F) and then return to its previous mode. The LED will show FP and the status LED
blink alternating. Frost protection can be enabled/disabled using user parameter P7
Using an External Sensor
In order to utilize the external sensor, the internal sensor needs to be cut. The internal sensor is located in the
lower middle section of the PCB. It is marked with RT. It is recommended to cut one leg with a cutting tool and
bend the sensor to the side.
Calibrating the sensor
If the room temperature displayed does not agree with the room temperature effectively measured, the
temperature sensor can be recalibrated by adjusting user parameter P8. There is as well a potentiometer
located in the lower middle section on the PCB. Adjusting this will alter the temperature as well.
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