Lennox ML193UH045P36B Unit Information page 55

NORMAL COOLING MODE
POWER ON
IGNITION CONTROL MAIN POWER ON. LED: ON STEADY
CONTROL SELF DIAGNOSTIC CHECK.
IS CONTROL OPERATING NORMALLY?
YES
IS THERE A PROPER GROUND?
YES
IS POLARITY CORRECT?
YES
IS VOLTAGE
ABOVE 90 VOLTS?
YES
LED: ON STEADY.
REMAINS UNCHANGED THROUGHOUT COOLING CYCLE.
THERMOSTAT CALLS FOR COOLING.
COMPRESSOR CONTACTOR AND SYSTEM FAN
ENERGIZED WITH 2‐SECOND DELAY
(COOLING SPEED). EAC TERM. ENERGIZED.
THERMOSTAT OPENS.
COMPRESSOR OFF.
SYSTEM FAN AND EAC TERM. OFF
WITH 60‐SECOND DELAY.
CONTINUOUS FAN SEQUENCE OF OPERATION
CONTROL (G) ENERGIZES SYSTEM FAN ON CONTINUOUS
THERMOSTAT CALLS FOR COOLING.
YES
SYSTEM FAN SWITCHED TO COOL SPEED.
EAC TERM. REMAINS ON.
THERMOSTAT OPENS.
MANUAL FAN SELECTION MADE AT THERMOSTAT.
CONTROL (G) ENERGIZES SYSTEM FAN ON
CONTINUOUS BLOWER SPEED.
COOLING SEQUENCE OF OPERATION
NO
NO
NO
NO
LED: ON STEADY
MANUAL FAN SELECTION MADE AT THERMOSTAT.
BLOWER SPEED. EAC TERMINAL IS ENERGIZED.
THERMOSTAT CALLS FOR HEAT (W).
NO
NO
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ABNORMAL COOLING MODE
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH NORMAL DELAY.
LED: OFF
INTERRUPT MAIN POWER TO RESET CONTROL.
LED: ON STEADY
CONTROL WILL CONTINUE TO CALL FOR COOLING
IN THIS CONDITION.
LED: 9 FLASHES
CONTROL WILL CONTINUE TO CALL FOR COOLING
IN THIS CONDITION.
LED: ON STEADY.
CONTROL WILL CONTINUE TO CALL FOR
COOLING IN THIS CONDITION.
HUM TERM. ENERGIZES
WITH COMB. AIR INDUCER.
YES
SYSTEM FAN SWITCHES TO
HEATING SPEED.
THERMOSTAT OPENS.
HUM TERM. DE-ENERGIZES
WITH COMB. AIR INDUCER
SYSTEM FAN SWITCHES TO
CONTINUOUS BLOWER SPEED
.