Goodman GMEC80 Service Instructions Manual page 34

SERVICING
Flame Current
Solder Pads
L
INE VOLTAGE NOW PRESENT
3. As soon as flame is established a micro-amp reading
should be evident once proof of flame (micro-amp
reading) is established, the hot surface ignitor will be
de-energized.
4. The Integrated Ignition controls will have 1 to 4 mi-
cro-amps. If the micro-amp reading is less than the
minimum specified, check for high resistance wiring
connections, sensor to burner gap, dirty flame sensor,
or poor grounding.
5. If absolutely no reading, check for continuity on all com-
ponents and if good - replace ignition control module.
NOTE: Contaminated fuel or combustion air can create a
nearly invisible coating on the flame sensor. This coating
works as an insulator causing a loss in the flame sense
signal. If this situation occurs the flame sensor must be
cleaned with steel wool.
HIGH VOLTAGE
D ALL
ISCONNECT POWER BEFORE SERVICING OR
M
INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY
F
BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
I
F YOU MUST HANDLE THE ITNITOR, HANDLE WITH CARE.
THE IGNITOR BODY WITH BARE FINGERS, ROUGH HANDLING, OR
VIBRATION COULD RESULT IN EARLY IGNITOR FAILURE.
QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITOR.
ANNUAL INSPECTION
The furnace should be inspected by a qualified installer, or
service agency at least once per year. This check should be
performed at the beginning of the heating season. This will
ensure that all furnace components are in proper working
34
WARNING
WARNING
CAUTION
T
OUCHING
O
NLY A
order and that the heating system functions appropriately.
Pay particular attention to the following items. Repair or
service as necessary.
• Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections
at and internal to the furnace.
• Combustion air intake pipe system (where applica-
ble). Check for blockage and/or leakage. Check
the outside termination and the connection at the
furnace.
• Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
• Burners. Check for proper ignition, burner flame, and
flame sense.
• Wiring. Check that electrical connections are tight
and free of corrosion. Check wires for damage.
• Filters.
AIR FILTER
N
EVER OPERATE FURNACE WIHTOUT A FILTER INSTALLED AS DUST
AND LINT WILL BUILD UP ON INTERNAL PARTS RESULTING IN LOSS OF
EFFICIENCY, EQUIPMENT DAMAMGE, AND POSSIBLE FIRE.
Filters must be used with this furnace. Filters do not ship
with this furnace but must be provided by the installer for
proper furnace operation.
Note: Dirty filters are the most common cause of inade-
quate heating or cooling performance.
HIGH VOLTAGE
D ALL
ISCONNECT POWER BEFORE SERVICING OR
M
INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY
F
BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
INDUCED DRAFT AND CIRCULATION BLOWERS
The bearings in the induced draft blower and circulator
blower motors are permanently lubricated by the manu-
facturer. No further lubrication is required. Check motor
windings for accumulation of dust which may cause over-
heating. Clean as necessary.
WARNING
WARNING