Lux Products P621Uc Thermostat User Manual


 
TO SET THE COOL LIMIT STOP: Place the System Mode switch in the OFF position,
and the Set Slide switch in the RUN position. Press and hold the DOWN button
while sliding the System Mode switch from OFF to COOL. The words “STOP” and
“LOCK CODE” will appear on the screen, along with two digits. Use the UP/DOWN
buttons to select the proper code to access the cool limit setting. Press the
NEXT button to accept the setting. If the code you tried was not correct, the
thermostat will exit and return to the Normal Run screen with no changes made.
If the entered code is correct, the screen will add the word “SET” and display the
current cool set temperature limit. Use the UP/DOWN buttons to adjust the
minimum cool set temperature value. Press the NEXT button to accept the
setting and return to the Normal Run screen in cool mode.
TO CHANGE THE TEMPERATURE STOP LOCK CODE: Place the System Mode switch
in the OFF position, and the Set Slide switch in the RUN position. Press and hold
the NEXT button for at least 5 seconds. The words “STOP” and “LOCK CODE” will
appear on the screen, along with two digits. Use the UP/DOWN buttons to enter
the current code (“00” by default) and press the NEXT button one time. The word
“SET” will now be displayed. Use the UP/DOWN buttons to choose a new 2-digit
code between “00” and “99”. Press the NEXT button to accept the setting. The
screen will flash briefly to confirm the code change, and return to the Normal
Run screen in Off mode.
IF YOU FORGET YOUR TEMPERATURE STOP CODE: The code can be reset to the
factory default “00” by performing the following steps. Place the System Mode
switch in the OFF position, and the Set Slide switch in the RUN position. Press
and hold the NEXT and HOLD buttons together for at least 10 seconds. The
screen will start flashing, and display words “SET”, “STOP” and “LOCK CODE”,
along with the new code of “00”. After a couple seconds, the screen will
automatically return to the Normal Run screen in Off mode.
KEYPAD LOCKOUT: You can lock the front panel buttons to prevent unauthorized
tampering of your thermostat settings.
NOTE: These keypad lock instructions need to be performed in a timely manner.
The 4-button sequence which locks the thermostat must be entered within a 10-
second timeframe, or the keypad lockout sequence will have to be entered again
from the beginning.
TO LOCK THE KEYPAD: Start with the System Mode switch in either the HEAT or
COOL positions, and the Set Slide switch in the RUN position. Perform a single
press of each button, in the following sequence: NEXT, NEXT, NEXT, HOLD.
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