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80MGF TROUBLESHOOTING SEQUENCE − COOLING
YES
THERMOSTAT CALLS FOR COOLING.
LED: Slow flash rate.
REMAINS UNCHANGED THROUGHOUT COOLING CYCLE.
NO
COMPRESSOR CONTACTOR AND SYSTEM FAN
ENERGIZED AT COOLING SPEED AFTER
1 SECOND DELAY.
THERMOSTAT OPENS.
COMPRESSOR OFF.
SYSTEM FAN OFF AFTER COMPLETING
SELECTED DELAY INTERVAL
(At dip switches).
80MGF TROUBLESHOOTING SEQUENCE − FAN ONLY
MANUAL FAN SELECTION MADE AT THERMOSTAT.
CONTROL ENERGIZES SYSTEM FAN
AT HEATING SPEED.
THERMOSTAT CALLS FOR HEAT.
LED: Slow flash rate.
REMAINS UNCHANGED THROUGHOUT SEQUENCE.
THERMOSTAT CALLS FOR COOLING.
SYSTEM FAN REMAINS ON HEATING SEQUENCE AND
RUNS THROUGH COMPLETION.
SYSTEM FAN SWITCHED
TO COOLING SPEED. COOLING
SEQUENCE RUNS TO COMPLETION.
SYSTEM FAN ON AT HEATING SPEED
UNTIL MANUAL FAN IS SWITCHED
OFF AT THERMOSTAT.
YES NO
LED CODES
SLOW FLASH
FAST FLASH
2 FLASH
3 FLASH
4 FLASH
5 FLASH
STEADY ON
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.
.
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