Troubleshooting - Lennox G61MPV?36B?045 Installation Instructions Manual

Troubleshooting: Heating Sequence of Operation
CONTROL SELF−CHECK OKAY?
POLARITY OKAY?
YES
PROPER GROUND?
YES
NORMAL OPERATION:
STATUS LED −− PULSE
NO
THERMOSTAT CALLS FOR HEAT:
STATUS LED −− HEARTBEAT
YES
PRIMARY AND SECONDARY LIMIT
SWITCHES CLOSED?
YES
ROLLOUT SWITCH CLOSED?
YES
FIRST (LOW) STAGE PRESSURE SWITCH
CONTACTS OPEN?
YES
SECOND (HIGH) STAGE PRESSURE SWITCH
CONTACTS OPEN?
YES
TWO−STAGE OR SINGLE−STAGE THERMOSTAT
CALL FOR HEAT
COMBUSTION AIR INDUCER ON LOW SPEED.
STATUS LED −− HEARTBEAT
CONTINUED ON NEXT PAGE
HEATING SEQUENCE OF OPERATION
NORMAL AND ABNORMAL HEATING MODE
POWER ON
IS THERE A
A
B
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
NO
INDOOR BLOWER OFF. (RESET CONTROL BY
TURNING MAIN POWER OFF.)
POLARITY REVERSED.
NO
STATUS ERROR CODE 5 + 4.
NO
SIGNAL HOLDS UNTIL UNIT IS PROPERLY GROUNDED.
STATUS ERROR CODE 5 + 3.
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER ON. HAS PRIMARY OR
SECONDARY LIMIT RESET WITHIN 3 MINUTES?
STATUS ERROR CODE 3 + 1.
NO
60−MINUTE LIMIT WATCHGUARD MODE.
GAS VALVE OFF, COMBUSTION AIR INDUCER
OFF, INDOOR BLOWER OFF WITH DELAY.
STATUS ERROR CODE 4 + 5.
GAS VALVE OFF. COMBUSTION AIR INDUCER ON.
NO
INDOOR BLOWER ON.
STATUS ERROR CODE 5 + 1.
SEQUENCE HOLDS UNTIL ROLLOUT SWITCH IS
RESET AND MAIN POWER IS INTERRUPTED OR
NO
T'STAT IS CYCLED OFF/ON FOR 3 SEC. MINIMUM.
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF. CONTROL REMAINS UNTIL
PRESSURE SWITCH IS DETECTED OPEN.
STATUS ERROR CODE 2 + 4
NO
GAS VALVE OFF.
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF.
CONTROL WILL NOT ATTEMPT SECOND−STAGE
OPERATION DURING THIS HEAT DEMAND.
FIRST−STAGE OPERATION WILL BE ATTEMPTED.
STATUS ERROR CODE 2 + 6.
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NO
YES
NO
YES