Lux Products SMART TEMP PSP721U Installation And Operating Instructions Manual page 28

Universal programmable thermostat
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CHANGING THE LOCK CODE: To create your own specific
lock code, first ensure that the rotary dial is in the RUN
position. Press the NEXT button for at least 2 seconds. The
words "ENTER CODE" will appear on the screen, along with
"0000". Now press the HOLD button again for at least 2
seconds. The words "SET CODE" will appear on the screen,
along with "0000".
IF YOU FORGOT YOUR LOCK CODE: You can still unlock the
thermostat by performing the following steps: On the back
of thermostat locate JP1, which is a row of 3 metal pins at
the right edge of the circuit board above the battery tray.
There should be a plastic jumper cap on 2 of the 3 pins
(right or left).
J P 1
Move the jumper cap so that it is on the opposite 2 pins.
For this change to be recognized, move the Temperature
Mode switch to any other position than its current one.
These steps listed should have changed the lock code back
to the default of "0000". Follow the instructions already
listed in "UNLOCKING THE THERMOSTAT".
28

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