Issue Date: 06.04.2021
Page 6 / 12
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Deutschland · tel: 02778/6960-0 · fax: -400 ·
LCF02-5DO_Datasheet_en.docx © 2021
°F/°C selective
Temp display range is 32 °F..99 °F, respectively 0 °C..50 °C (factory default is °C).
By simultaneously pressing the keys "▲" and "▼" the display
of the unit system can be switched directly on the LCD.
Temperature offset correction
(Register address 0x0106)
The internal sensor will be affected by the Thermostat’s self-heating. As a consequence it would display a higher room temperature than the
average of indoor temperature (real value). Item 5 & 6 of the parameter table does contain the correction of temperature offset (resolution 0,1 °C).
Set the Temperature set point range
(Register address 0x0110 – 0x0112)
Press
“▲”or “▼” key
to adjust the temperature set point range. Factory default (°C) is 16 °C..30 °C.
Key lock selection
(Register address 0x010D)
If a key is pressed that is locked, the lock symbol
will appear for 2s and blink 2x but no further action is taken.
Power failure – Restart selection
(Register address 0x010C)
On the LCD, there are three symbols
that define how the thermostat will restart after a power failure:
Keep thermostat switched OFF
Switch thermostat to last state before power failure (Record and Memorize)
Turn the thermostat ON
Storage during power loss
The status will be kept in EEPROM, while the power failure, so no data will be lost.
The setpoint is not saved. The standard setpoint after power-on reset applies, register address 271 (0x010F).
Occupancy (OCC)
If the input is configured for an Occupancy sensor. If the sensor indicates “UnOccupied” the current setpoint will be replaced by the Eco Mode
Setpoint Temp. The display will show the leaf symbol and the lettering ECO to indicate the ECO mode. Once the room occupancy is detected
again the previously used Setpoint will be restored and the leaf symbol will not be showing any more.
Window contact (ESI)
If the input is configured as window contact, the “Window open” Symbol will be displayed the thermostat will check every 3 seconds the input
whether active. The cooling valve will be closed as long as the input will be active. The rest of the thermostat will work as usual, the user may
change the setpoint or the fan stage, but the valve outputs will remain in valve closed position. If configured the “Window open”
or the Dew
Point symbol
will be flashing. When the input will not be active, the thermostat’s outputs return to normal operation and operates the outputs
normally.
Sensor failure alarm
In case the room NTC temp sensor is open or short, thermostat switches fan to medium and the valve to 50% (5V output, 50% duty cycle for PWM
and ON/OFF). The display will show (blinking) error code: “E1” Thermostat will allow to control fan manually as well as the valve output using the
“▲”or “▼” keys. Every operation of the “▲”or “▼” key
s will decrement / increment the output voltage by 1V = 10% AND the PWM by 10%. The
percentage is shown in the display.
