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SURELIGHT CONTROL
COOLING SEQUENCE OF OPERATION
NORMAL COOLING MODE
ABNORMAL COOLING MODE
IGNITION CONTROL MAIN POWER ON.
CONTROL SELF DIAGNOSTIC CHECK.
IS CONTROL OPERATING NORMALLY?
YES
POWER ON
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH NORMAL DELAY.
SIGNAL CIRCUIT BOARD FAILURE AT LED.
INTERRUPT MAIN POWER TO RESET CONTROL.
YES
TURN INDUCER ON FOR 1 SECOND (Control board 97L48
)
IS POLARITY REVERSED?
ROLLOUT SWITCH MONITORED CONTINUOUSLY.
IS ROLLOUT SWITCH CLOSED?
LED: SLOW FLASH RATE REMAINS UNCHANGED
THROUGHOUT COOLING CYCLE.
THERMOSTAT CALLS FOR COOLING.
COMPRESSOR CONTACTOR AND SYSTEM FAN
ENERGIZED AFTER DELAY. COOL SPEED AND
ELECTRONIC AIR CLEANER TERMINAL IS ENERGIZED.
(Control board 69M15, 2-second delay.
Control board 97L48 no delay).
COMPRESSOR OFF.
THERMOSTAT OPENS.
COOLING SPEED AND ELECTRONIC AIR CLEANER
TERMINAL OFF WITH FIELD ADJUSTABLE DELAY
(Control board 69M15, 2 or 45 second delay.
Control board 97L48 no delay).
NO
YES
NO
THERMOSTAT OFF
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH NORMAL DELAY.
SIGNAL CIRCUIT BOARD FAILURE AT LED.
SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES.
NO
IS THERE
PROPER GROUND?
IS VOLTAGE
ABOVE 75 VOLTS?
NO
YES
NO
LED#1 AND LED#2
ALTERNATING FAST
FLASH. SIGNAL
HOLDS UNTIL UNIT IS
PROPERLY GROUND.
LED#1 AND LED#2 ALTERNATING FAST
FLASH. SIGNAL HOLDS UNTIL VOLTAGE
RISES ABOVE 75 VOLTS.
LED#1 FAST FLASH LED#2 SLOW FLASH
YES
Summary of Contents for G50UHi Series
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