Lennox G32V Series Service Literature page 68

IS POLARITY REVERSED?
SIGNAL IMPROPER
GROUND AT DS.
NO
SIGNAL HOLDS
PROPER GROUND?
UNTIL UNIT IS
PROPERLY
GROUNDED.
THERMOSTAT CALLS FOR FIRST−STAGE COOL.
COMPRESSOR AND CONDENSER FAN
INDOOR BLOWER ENERGIZED ON FIRST STAGE
COOL SPEED AFTER 2 SECOND DELAY.
FIRST−STAGE DEMAND FOR COOL SATISFIED?
THERMOSTAT CALLS FOR SECOND−STAGE COOL.
INDOOR BLOWER RAMPS UP TO SECOND−STAGE COOL SPEED.
SECOND−STAGE DEMAND FOR COOL SATISFIED?
UNIT RETURNS TO FIRST STAGE COOL
COOLING SEQUENCE OF OPERATION
POWER ON
NO
IS THERE YES
ABOVE 75 VOLTS?
ENERGIZED.
NO
YES
YES
SIGNAL POLARITY REVERSED.
DS1 FAST FLASH, DS2 SLOW FLASH.
NO
IS VOLTAGE
LOW VOLTAGE SIGNAL AT DS HOLDS
UNTIL VOLTAGE RISES ABOVE 75 VOLTS.
YES
YES
COMPRESSOR AND CONDENSER FAN DE−ENERGIZED.
INDOOR BLOWER DE−ENEGIZED.
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