Goodman GMVC96 BA Series - Page 63

TROUBLESHOOTING
63
• Furnace f ails to operate.
• Integrated control module LED
display provides  error code.

• Integrated control
module has lost
communications w ith
circulator blow er
motor.
• Loose w iring connection
at circulator motor control
leads.
• Failed circulator blow er
motor.
• Failed integrated control
module.
• Furnace f ails to operate.
• Integrated control module LED
display provides  error code.

• Circulator blow er
motor horse pow er in
shared data set does
not match circulator
blow er motor horse
pow er.
• Incorrect circulator blow er
motor in furnace.
• Incorrect shared data set
in integrated control module.
• Furnace operates at reduced
performance.
• Airf ow delivered is less than
expected.
• Integrated control module LED
display provides  error code.

• Circulator blow er
motor is operating in a
pow er, temperature,
or speed limiting
condition.
• Blocked filters.
• Restrictive ductw ork.
• Undersized ductw ork.
• High ambient
temperatures.
• Furnace f ails to operate.
• Integrated control module LED
display provides  error code.

• Circulator blow er
motor senses
a loss of rotor control.
• Circulator blow er
motor senses high
current.
• Abnormal motor loading,
sudden change in speed or
torque, sudden blockage of
furnace air inlet/outlet
• Furnace f ails to operate.
• Integrated control module LED
display provides  error code.

• Circulator blow er
motor f ails to start 10
consecutive times.
• Obstruction in circular
blow housing.
• Seized circular blow er
motor bearings
• Failed circular blow er
motor.
• Furnace f ails to operate.
• Integrated control module LED
display provides  error code.

•
Circulator blow er
motor shuts dow n for
over or under voltage
condition.
•
Circulator blow er
motor shuts dow n
due to over
temperature condition
on pow er module.
• High AC line voltage to
furnace.
• Low AC line voltace to
furnace.
• High ambient temperatures.
• Furnace f ails to operate.
• Integrated control module LED
display provides  error
code.

•
Circulator blow er
motor does not have
enough information to
operate properly.
Motor f ails to start 40
consecutive times.
• Error w ith integrated
control module. Motor has a
rotor condition.
• Furnace operates at
reduced perf ormance or
operates on low stage w hen
high stage is expected.
• Integrated control module LED
display provides  error code.

•
Airflow is low er than
demanded.
• Blocked filters.
• Restrictive ductw ork.
• Undersized ductw ork.
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• Tighten or correct w iring
connection.
• Check circulator blow er motor.
Replace if necessary.
• Check integrated control module.
Replace if necessary.
• Turn pow er OFF prior to
repair
• Replace circulator motor
w ith correct replacement
part.
• Replace integrated control
module w ith correct
replacement part.
• Verify circulator blow er if motor
horse pow er is the same specifed
for the specifc f urnace model.
Replace if necessary.
• Verify shared data set is correct
for the specifc model. Re-populate
data using correct memory card if
required.
• Turn pow er OFF prior to
repair
• Replace motor w ith correct
replacement part.
• Use memory card for the
specifc model
• Insert memory card
BEFORE turning pow er ON.
Memory card may be
removed after data is loaded
and pow er is turned of f.
• Error code w ill be cleared
once shared data and motor
horse pow er match.
• Check filters for blockage. Clean
filters or remove obstruction.
• Check ductw ork for blockage.
Remove obstruction. Verify all
registers are f ully open.
• Verify ductw ork is appropriately
sized for system. Resize/replace
ductw ork if necessary.
• See "III. Product Description" and
"IV. Location Requirements &
Considerations" furnace installation
requirements.
• Turn pow er OFF prior to
repair.
• Check integrated control module.
Verify control is populated w ith
correct shared data set. See data
errors above for details. Check for
locked rotor condition ( see error
code above f or details).
• Turn pow er of f prior to
repair.
• Check filters for blockage. Clean
filters or remove obstruction.
• Check ductw ork for blockage.
Remove obstruction. Verify all
registers are f ully open.
• Verify ductw ork is appropriately
sized for system. Resize/replace
ductw ork if necessary.
• Turn pow er OFF prior to
repair.
• Check f ilters, f ilter grills/registers,
duct system, and f urnace air
inlet/outlet for blockages.
• Turn pow er OFF prior to
repair
• Check circular blow er f or
obstructions. Remove and
repair/replace w heel/motor if
necessary
• Turn pow er OFF prior to
repair.
• Replace motor w ith correct
replacement part.
• Replace w heel w ith correct
replacement part.
• Check pow er to furnace. Verify
line voltage to furnace is w ithin the
range specified on the furnace
rating plate. See "III. Product
description" and IV Location
Requirements and Considerations"
furnace installation requirements.
• Turn pow er OFF prior to
repair.
• Replace motor w ith correct
replacement part.
• Use memory card for the
specifc model.