Lennox ML196DF045XE36B Manual page 52

Troubleshooting: Continuous Fan / Accessories Sequence of Operation
CONTINUOUS FAN / ACCESSORIES SEQUENCE OF OPERATION
LED: SLOW FLASH RATE REMAINS
UNCHANGED THROUGHOUT SEQUENCE.
MANUAL FAN SELECTION MADE AT THERMOSTAT.
CONTROL (G) ENERGIZES SYSTEM FAN AT FAN
SPEED. EAC TERMINAL IS ENERGIZED.
THERMOSTAT CALLS FOR HEAT (W).
YES
NO
SYSTEM FAN CONTINUES FAN SPEED WITHOUT
THERMOSTAT CALLS FOR COOLING.
INTERRUPTION. EAC TERMINAL REMAIN ON.
NO
YES
HUM TERMINALS ARE ENERGIZED WITH
SYSTEM FAN SWITCHED TO COOL SPEED.
COMBUSTION AIR BLOWER.
EAC TERM. REMAINS ON.
SYSTEM FAN SWITCHES TO HEAT SPEAD AFTER 30
THERMOSTAT OPENS.
SECOND DELAY. EAC AND HUM TERMINALS REMAIN ON.
MANUAL FAN SELECTION MADE AT THERMOSTAT.
THERMOSTAT OPENS.
CONTROL (G) ENERGIZES SYSTEM FAN AT FAN
SPEED. EAC TERM. ENERGIZED.
HUM. TERMINALS OFF AFTER POST PURGE
BY COMBUSTION AIR INDUCER. SYTEM FAN
SWITCHES TO FAN SPEED AFTER BLOWER
OFF DELAY. EAC CONTINUES WITHOUT
INTERUPTION.
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