Amana M8 Installation Instructions Manual page 35

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T
ROUBLESHOOTING
Symptoms of
Abnormal Operation
• Circulator blower runs
continuously. No furnace
operation.
• Integrated control module
diagnostic LED is flashing
FOUR (4) flashes.
•Induced draft blower and
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 opera-
tion.
•Integrated control
module diagnostic LED is
flashing SEVEN (7) flashes.
2
LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.
C
HART
Associated
Fault
Associated
LED Code
2
Description(s)
LED Code
2
• Primary limit
circuit is open.
4
4 FLASHES
•Flame sensed
5
with no call for
heat.
5 FLASHES
•Rollout limit
open.
6
•Integrated control
module fuse is
6 FLASHES
blown.
•Flame sense
microamp signal is
low.
7
7 FLASHES
PCBBF134 & PCBBF132 CONTROL BOARDS
Possible Causes
•Insufficient conditioned air
over the heat exchanger.
Blocked filters, restrictive
ductwork, improper
circulator blower speed, or
failed circulator blower.
•Faulty primary limit switch.
•Loose or improperly
connected wiring.
•Short to ground in flame
sense circuit.
•Flame rollout.
•Misaligned burners,
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 safety circuits.
• Faulty rollout limit.
•Flame sensor is coated/
oxidized.
•Flame sensor incorrectly
positioned in burner
flame.
•Lazy burner flame due to
improper gas pressure or
combustion air.
35
Corrective Action
•Check primary limit.
•Turn power OFF
Replace if necessary.
•Check filters and
•Replace primary
ductwork for blockage.
Clean filters or remove
obstruction.
•Check circulator blower
•Replace blower
speed and performance.
Correct speed or replace
blower if necessary.
•Tighten or correct wiring
connection.
•Turn power OFF
•Correct short at flame
sensor or in flame
sensor wiring.
•Check burners for proper
•See "Vent/Flue
alignment.
•Check flue and air inlet
•Replace induced
piping for blockage, proper
length, elbows, and
termination. Correct as
necessary.
•Check rollout limit.
•Replace integrated
Replace if necessary.
•Check heat exchanger.
•Check induced draft blower
for proper performance.
•Read precautions in
Replace, if necessary.
•Check position of orifice
plate/heat exchanger
shield.
•Tighten or correct wiring
•Replace rollout
connection.
•Repair short in 24 volt AC
control/safety circuit(s).
•Replace integrated control
module fuse (3A).
•Inspect for proper sensor
•Turn power OFF
alignment.
•Clean flame sensor
•Compare current gas
pressure to rating plate
info. Adjust as needed.
•See rating plate for
Cautions
& Notes
prior to repair.
switch with proper
replacement part.
with correct
replacement part.
prior to repair.
Pipe" section for
piping details.
draft blower with
proper replace-
ment part.
control module fuse
with 3A automotive
fuse.
"Electrostatic
Discharge" section
of manual.
limit with correct
replacement part.
prior to repair.
with steel wool.
proper gas
pressure.

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