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COOLING SEQUENCE OF OPERATION
YES
THERMOSTAT CALLS FOR COOLING.
BURNER CONTROL LED: Slow flash rate.
REMAINS UNCHANGED THROUGHOUT COOLING CYCLE.
NO
COMPRESSOR CONTACTOR AND BLOWER ENERGIZED. BLOWER ON HIGH SPEED. ON
VSP2 “ON/OFF’” LED–DS3 IS LIT, “CFM” LED–DS4 BLINKS ONCE FOR EVERY 100 CFM.
ACCA AND ACCH TERMINALS ON BURNER CONTROL BOARD ARE ENERGIZED.
THERMOSTAT OPENS.
COMPRESSOR OFF.
BLOWER, ACCA AND ACCH TERMINALS
ARE DE–ENERGIZED.
CONTINUOUS FAN
SEQUENCE OF OPERATION
CONTINUOUS FAN SELECTION MADE AT THERMOSTAT.
BLOWER ENERGIZED AT LOW CONTINUOUS SPEED.
ACCA AND ACCH TERMINALS ARE ENERGIZED.
THERMOSTAT CALLS FOR HEAT.
BURNER CONTROL LED: Slow flash rate.
REMAINS UNCHANGED THROUGHOUT SEQUENCE.
THERMOSTAT CALLS FOR COOLING.
SYSTEM FAN SWITCHES TO HEATING SPEED AFTER SELECTED
DELAY. ACCA & ACCH TERMINALS REMAIN ENERGIZED.
SYSTEM FAN SWITCHES TO CONTINUOUS SPEED AND
ENERGIZES ACCA & ACCH TERMINALS WHICH REMAIN ON
UNTIL CONTINUOUS FAN IS SWITCHED OFF AT THERMOSTAT.
YES
NO
BURNER CONTROL LED CODES
SLOW FLASH
FAST FLASH
2 FLASH
3 FLASH
4 FLASH
5 FLASH
6 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.
FAILED HOT SURFACE IGNITOR
CONTROL BOARD FAILURE.
.
THERMOSTAT SATISFIED (OPENS).
SYSTEM FAN SWITCHED OFF AFTER DELAY.
ACCA & ACCH TERMINALS DE–ENERGIZED.
SYSTEM FAN SWITCHED TO COOLING SPEED.
ACCA &ACCH TERMINALS REMAIN ENERGIZED.
THERMOSTAT SATISFIED (OPENS).
