Troubleshooting - Lux Products PSPU721T Instruction Manual

2 heating and 1 cooling with dual fuel switch

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TROUBLESHOOTING

Touch screen buttons do not function properly. Remove cover, press the reset button located

in the bottom left corner then accurately touch 3 target centers on the screen when prompted.

Air conditioning turns on in HEAT mode and heating turns on in COOL mode. Reverse the

OB valve (see "Advanced Settings" Page 36).

PARTIAL LOCK and FULL LOCK do not function. You must not touch the screen for 1 minute

for LUXPRO

thermostat to automatically lock.

Thermostat appears normal until the screen becomes blank when the compressor or

heating system turns on. You need to connect the "C" wire. 4 wire system will not function

unless the heat and compressor contactors can supply enough current to power the thermo-

stat with only 4 wires, if you cannot hook up the "C" wire another possible solution is to connect

one 250 ohm 10 watt resistor in the HVAC room, for cooling problems between C and W or in the

case of heating problem between C and Y1.

I forgot my PIN and cannot unlock the thermostat. Remove the cover plate, press the reset

button located in the bottom right corner, as soon as the message "touch to reset password"

appears touch the screen, your PIN will be erased and the thermostat will unlock.

INSTRUCTION MANUAL

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