Lennox EL280DF070E36A Unit Information page 41

POWER ON
IS POLARITY REVERSED?
NO
IS THERE
PROPER GROUND?
THERMOSTAT CALLS FOR FIRST-STAGE COOL.
COMPRESSOR AND CONDENSER FAN
ENERGIZED.
INDOOR BLOWER ENERGIZED ON FIRST STAGE
COOL SPEED AFTER 2 SECOND DELAY.
FIRST-STAGE DEMAND FOR COOL SATISFIED?
NO
THERMOSTAT CALLS FOR SECOND-STAGE COOL.
INDOOR BLOWER RAMPS UP TO SECOND-STAGE COOL SPEED.
SECOND-STAGE DEMAND FOR COOL SATISFIED?
YES
UNIT RETURNS TO FIRST STAGE COOL
COOLING SEQUENCE OF OPERATION
YES
NO
YES
YES
Page 41
SIGNAL POLARITY REVERSED.
CONTROL WILL CONTINUE TO CALL FOR COOLING
IN THIS CONDITION.
STATUS ERROR CODE 5 + 4.
SIGNAL IMPROPER GROUND AT LED.
CONTROL WILL CONTINUE TO CALL FOR COOLING
IN THIS CONDITION.
STATUS ERROR CODE 5 + 3.
COMPRESSOR AND CONDENSER FAN DE-ENERGIZED.
INDOOR BLOWER DE-ENEGIZED.