Troubleshooting Chart - Amana 10759833 Installation Instructions Manual

Associated
Symptoms of Abnormal
Operation
LED Code
• Furnace fails to operate.
NONE
• Integrated control module
diagnostic LED provides
no signal.
• Furnace fails to operate.
ON
• Integrated control module
diagnostic LED is lit
continuously.
CONTINUOUS
• Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing ONE (1) flash.
1 FLASH
• Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing TWO (2) flashes.
2 FLASHES
• Induced draft blower
cycles ON for one minute
and OFF for three
minutes with no further
furnace operation.
3 FLASHES
• Integrated control module
diagnostic LED is
flashing THREE (3)
flashes.
1
Integrated control module will automatically attempt to reset from lockout after one hour.

Troubleshooting Chart

Fault Description(s)
2
• No 115 volt power to
furnace, or no 24 volt
power to integrated
control module.
• Blown fuse or circuit
breaker.
• No signal from
thermostat.
• Integrated control
module has an
internal fault.
ON
• Furnace lockout due
to an excessive
1
number of ignition
"retries" (3 total) or
"recycles (5 total) 1 .
• Pressure switch
circuit is closed.
2
• Induced draft
blower is not
operating.
• Low stage pressure
switch circuit does
3
not close in
response to
induced draft
blower operation.
Possible Causes
• Manual disconnect switch
OFF, door switch open, or
24 volt wires improperly
connected or loose.
• Blown fuse or circuit
breaker.
• Improper thermostat
connection or setting.
• Integrated control module
has an internal fault.
• Failure to establish flame.
Cause may be no gas to
burners, front cover
pressure switch stuck open,
bad igniter or igniter
alignment, improper orifices,
or coated/oxidized or
improperly connected flame
sensor.
• Loss of flame after establish-
ment. Cause may be
interrupted gas supply, lazy
burner flames (improper gas
pressure or restriction in flue
and/or combustion air
piping), front cover pressure
switch opening, or improper
induced draft blower
performance.
• Induced draft blower
pressure switch contacts
sticking.
• Shorts in pressure switch
circuit.
• Pressure switch hose
blocked, pinched or
connected improperly.
• Blocked flue and/or inlet air
pipe, blocked drain system,
or weak induced draft
blower.
• Incorrect low stage pressure
switch setpoint or malfunc-
tioning switch contacts.
• Loose or improperly
connected wiring.
40
Corrective Action Cautions and Notes
• Assure 115 and 24 volt • Turn power OFF prior
power to furnace to repair.
integrated control module.
• Check integrated control • Replace integrated
module fuse (3A). control module fuse
Replace if necessary. with 3A automotive
fuse.
• Check for possible shorts
in 115 and 24 volt circuits. • Improper thermostat
Repair as necessary. connection or setting.
• Turn power OFF prior
• Replace bad integrated
to repair.
control module.
• Read precautions in
"Electrostatic Dis-
charge" section of
manual.
• Locate and correct gas
interruption.
• Check front cover
pressure switch
operation (hose, wiring, • Turn power OFF prior
to repair.
contact operation).
Correct if necessary.
• Replace or realign
igniter.
• Check flame sense
signal. Sand sensor if
• Igniter is fragile, handle
coated and/or oxidized.
with care.
• Check flue piping for
• Sand flame sensor with
blockage, proper
emery cloth.
length, elbows, and
• See "Vent/Flue Pipe"
termination.
section for piping
• Verify proper induced
details.
draft blower perfor-
mance.
• Replace induced draft
blower pressure switch.
• Repair short.
• Inspect pressure
switch hose. Repair, if
necessary,
• Turn power OFF prior
• Inspect flue and/or inlet
to repair.
air piping for blockage,
• Replace pressure
proper length, elbows,
switch with proper
and termination. Check
replacement part.
drain system. Correct
as necessary.
• Correct low stage
• Turn power OFF prior
pressure switch
to repair.
setpoint or contact
• Replace pressure
motion.
switch with proper
• Tighten or correct
replacement part.
wiring connection.