Lennox G24M SERIES Unit Information page 25

THERMOSTAT CALLS FOR COOLING.
YES
SYSTEM FAN SWITCHED TO COOLING
SPEED. ACC TERMINAL REMAINS ENERGIZED.
THERMOSTAT OPENS.
SLOW FLASH
FAST FLASH
2 FLASH
3 FLASH
4 FLASH
5 FLASH
STEADY ON
RAM CONTROL
COOLING TROUBLE SHOOTING SEQUENCE
LED: Slow flash rate.
REMAINS UNCHANGED THROUGHOUT COOLING CYCLE.
THERMOSTAT CALLS FOR COOLING.
COMPRESSOR CONTACTOR AND SYSTEM FAN
ENERGIZED AT COOLING SPEED AFTER
1 SECOND DELAY. ACC TERMINAL ENERGIZED.
THERMOSTAT OPENS.
COMPRESSOR OFF.
SYSTEM FAN AND ACC TERMINAL OFF AFTER
COMPLETING SELECTED DELAY INTERVAL
(At dip switches).
MANUAL FAN TROUBLESHOOTING SEQUENCE
LED: Slow flash rate.
REMAINS UNCHANGED THROUGHOUT SEQUENCE.
MANUAL FAN SELECTION MADE AT THERMOSTAT.
CONTROL ENERGIZES SYSTEM FAN AT CONTINUOUS
SPEED. ACC TERMINAL ENERGIZED.
THERMOSTAT CALLS FOR HEAT.
NO
NO
SYSTEM FAN SWITCHES TO CONTINUOUS SPEED
AND ENERGIZES ACC TERMINAL. BOTH REMAIN ON
UNTIL MANUAL FAN IS SWITCHED OFF AT THERMOSTAT.
LED CODES
NORMAL OPERATION. NO CALL FOR HEAT.
NORMAL OPERATION. CALL FOR HEAT.
SYSTEM LOCKOUT. FAILURE TO DETECT OR SUSTAIN FLAME.
.
PRESSURE SWITCH OPEN OR CLOSED.
HIGH LIMIT OR ROLLOUT SWITCH OPEN.
FLAME SENSED AND GAS VALVE NOT ENERGIZED.
CONTROL BOARD FAILURE.
YES
SYSTEM FAN SWITCHES TO HEATING SPEED AFTER
SELECTED DELAY. ACC TERM. REMAINS ENERGIZED.
THERMOSTAT OPENS.
SYSTEM FAN SWITCHED OFF AFTER DELAY.
3DJH 
ACC TERMINAL DE--ENERGIZED.