Goodman GME8 Installation Instructions Manual page 30

Symptoms of
Abnormal Operation
• Circulator blower runs
continuously. No furnace
operation.
• Integrated control module
diagnostic LED is flashing
FOUR (4) flashes.
• Induced draft blower & circulator
blower runs continuously. No
furnace operation.
• Integrated control module
diagnostic LED is flashing FIVE (5)
flashes.
• Furnace fails to operate.
• Integrated control module
diagnostic LED is flashing
SIX (6) flashes.
• No furnace operation.
• Normal furnace
operation.
• Integrated control
module diagnostic LED
is flashing SEVEN (7)
flashes.
• Induced draft blower runs
continuously. No furnace
operation.
• Integrated control module
diagnostic LED is flashing
continuously.
• LED is steady on
2
LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.
TROUBLESHOOTING CHART
Fault
Associated
2 Description(s)
LED Code
• Primary
4
limit circuit
is open.
4 FLASHES
• Flame
5
sensed
with no call
for heat.
5 FLASHES
• Rollout limit
open.
6
• Integrated
control
6 FLASHES
module fuse
is blown.
• Flame
7 sense
microamp
signal is
7 FLASHES
low.
• Polarity of
C 115 or 24
volt power
is reversed.
CONTINUOUS
FLASHING
• Normal
STEADY
operation.
ON
Possible
Causes
• Check primary limit. Replace if
• Insufficient conditioned
air over the heat
exchanger. Blocked
• Check filters and ductwork for
filters, restrictive
ductwork, improper
circulator blower speed,
• Check circulator blower speed
or failed circulator
blower.
• Faulty primary limit
switch.
• Tighten or correct wiring
• Loose or improperly
connected wiring.
• Check relay for proper
• Faultyrelay.
• Short to ground in • Correct short at flame
flame sense circuit. sensor or in flame sensor
wiring
• Check burners for proper
• Flame rollout.
• Misaligned burners,
• Check flue and air inlet
blocked flue and/or air
inlet pipe, or failed
induced draft blower.
• Loose or improperly
connected wiring.
•
• Short in 24 volt AC
control circuits or
• Check induced draft
safety circuits.
•Faulty rollout limit.
• Tighten or correct wiring
• Repair short in 24 volt AC
• Replace integrated control
• Flame sensor is • Sand flame sensor.
coated/oxidized.
• Inspect for proper sensor
• Flame sensor
incorrectly
• Compare current gas
positioned in burner
flame.
• Lazy burner flame
due to improper gas
pressure or
combustion air.
• Polarity of 115 volt AC
• Review wiring diagram to
power to furnace or
integrated control
• Verify proper ground.
module is reversed.
• Red and blue wires to
• Reverse red and blue
transformer are
reversed.
• Poor unit ground.
30
Corrective
Action
necessary.
blockage. Clean filters or
remove obstruction.
and performance. Correct
speed or replace blower if
necessary.
connection.
operation or high contact
resistance.
alignment.
piping for blockage, proper
length, elbows, and
termination. Correct as
necessary.
Check rollout limit. Replace
if necessary.
blower for proper
performance. Replace, if
necessary.
connection.
control/safety circuit(s).
module fuse (3A).
alignment.
pressure to rating plate
info. Adjust as needed.
correct polarity.
Correct if necessary.
wires connected to
transformer.
Cautions
& Notes
• Turn power OFF
prior to repair.
• Replace primary
switch with
proper
replacement part.
• Replace blower
with correct
replacement part.
• Replace relay with
correct
replacement part.
• Turn power
OFF prior to
repair.
• See "Vent/Flue
Pipe" section for
piping details.
• Replace induced
draft blower
with proper
replacement part.
• Replace
integrated control
module fuse with
3A automotive
fuse.
• Read precautions
in "Electrostatic
Discharge"
section of
manual.
• Replace rollout
limit with correct
replacement part.
• Turn power OFF
prior to repair.
• Clean flame
sensor with steel
wool.
• See "Vent/Flue
Pipe" section for
piping details.
• See rating plate
for proper gas
pressure.
• Turn power OFF
prior to repair.