Lennox International Inc G32Q5-125, G32Q3-100, G32Q5-100 Coolingsequenceofoperation, I- =-I

COOLINGSEQUENCEOFOPERATION

NORMAL COOLING MODE ABNORMAL COOLING MODE

	I	POWER ON	I
I	IGNITION CONTROL MAIN POWER ON.			I

IISCONTROLSELFOPERATINGDIAGNOSTICNORMALLY?CHECK. YES _1

GAS VALVE OFF. COMBUSTION AIR BLOWER OFF, INDOOR SLOWER OFF WITH NORMAL DELAY.

SIGNAL CIRCUIT BOARD FAILURE AT LED.

INTERRUPT MAIN POWER TO RESET CONTROL.

/

J

I	TURN INDUCER ON FOR 1 SECOND.			I
I	IS POLARITY REVERSED?					SIGNAL POLARITY REVERSED AT LED.
SIGNAL HOLDS"	N_	PRo/SE THERoE ._I YEs-J		IS VOLTAGE	_	LOW VOLTAGE SIGNAL AT LET HOLDS
UNTIL UNIT IS	I-_=-I	ERR	UND._	ABOVE 75 VOLTS?	I_1	UNT L VOLTAGE R SES ABOVE 75 VOLTS.
GPRRoOuPNEDRELY"I					GAS VALVE OFE COMBUSTION AIR INDUCER OFR
						INDOOR BLOWER OFF WITH NORMAL DELAY
I ROLLOUTISSWITCHROLLOUTMONITOREDSWITCHCLOSED?CONTINUOUSLY,						SIGNAL CIRCUIT BOARD FAILURE ATLED,
				SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES.

I CHECK FOR MAIN BURNER FLAME SENSE. IS MAIN BURNER FLAME OFF?

T

I LED: SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT COOLING CYCLE.

I THERMOSTAT CALLS FOR COOLING.

ICOMPRESSOR CONTACTOR AND SYSTEM FAN ENERGIZED WITH O-SECOND DELAY, ACB COOL

SPEED ENERGIZED. ACC. TERM. ENERGIZED.

N_I1

'-I

I

I

I

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF WITH NORMAL DELAY. SIGNAL CIRCUIT BOARD FAILURE AT LED.

SEQUENCE HOLDS UNTIL FLAME IS NOT SENSED,

I

1

I

THERMOSTAT OPENS.	I
COMPRESSOR OFF.	I
SYSTEM FAN AND ACC. TERM. OFF	I
WITH O-SECOND DELAY,	I

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