Filter
Top Products
COOLINGSEQUENCEOFOPERATION
NORMAL COOLING MODE ABNORMAL COOLING MODE
I POWER ON I
I IGNITION CONTROL MAIN POWER ON.
I CONTROL SELF DIAGNOSTIC CHECK.IS CONTROL OPERATING NORMALLY?
YES _1
I TURN INDUCER ON FOR 1 SECOND.
I IS POLARITY REVERSED?
SIGNAL HOLDS" N_ PRo/SE THERoE ._I YEs-J
UNTIL UNIT IS I-_=-I ERR UND._
GPRRoOuPNEDRELY"I
I ROLLOUT SWITCH MONITORED CONTINUOUSLY,IS ROLLOUT SWITCH CLOSED?
I
I
I
I
I
1
I
I
I
GAS VALVE OFF. COMBUSTION AIR BLOWER OFF, /
INDOOR SLOWER OFF WITH NORMAL DELAY.
J
SIGNAL CIRCUIT BOARD FAILURE AT LED.
INTERRUPT MAIN POWER TO RESET CONTROL.
SIGNAL POLARITY REVERSED AT LED.
IS VOLTAGE _ LOW VOLTAGE SIGNAL AT LET HOLDS
ABOVE 75 VOLTS? I_1 UNT LVOLTAGE R SES ABOVE 75VOLTS.
CHECK FOR MAIN BURNER FLAME SENSE. N_I1
IS MAIN BURNER FLAME OFF?
'-I
T
LED: SLOW FLASH RATE REMAINS UNCHANGED I
THROUGHOUT COOLING CYCLE.
I
THERMOSTAT CALLS FOR COOLING. I
COMPRESSOR CONTACTOR AND SYSTEM FAN
ENERGIZED WITH O-SECOND DELAY, ACB COOL
SPEED ENERGIZED. ACC. TERM. ENERGIZED.
THERMOSTAT OPENS. I
COMPRESSOR OFF. I
SYSTEM FAN AND ACC. TERM. OFF I
WITH O-SECOND DELAY,
I
GAS VALVE OFE COMBUSTION AIR INDUCER OFR
INDOOR BLOWER OFF WITH NORMAL DELAY
SIGNAL CIRCUIT BOARD FAILURE ATLED,
SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES.
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,
Page 31