Hart - Amana AMH8 Installation Instructions Manual

Associated
Symptoms of
Abnormal Operation LED Code
• 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
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
2 Description(s)
• Primary limit
4
circuit is open.
4 FLASHES
• Flame sensed
with no call
5
for heat.
5 FLASHES
• Rollout limit open.
6
• Integrated control
module fuse is
blown.
6 FLASHES
• Flame sense
microamp signal is
7
low.
7 FLASHES
• Polarity of 115
C
or 24 volt
power is
reversed.
CONTINUOUS
FLASHING
STEADY
• Normal operation.
ON
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.
• Polarity of 115 volt AC
power to furnace or
integrated control module
is reversed.
• Red and blue wires to
transformer are
reversed.
• Poor unit ground.
30
Corrective
Action
• Check primary limit.
Replace if necessary.
• Check filters and
ductwork for blockage.
Clean filters or remove
obstruction.
• Check circulator blower
speed and performance.
Correct speed or
replace blower if
necessary.
• Tighten or correct wiring
connection.
• Correct short at flame
sensor or in flame
sensor wiring
• Check burners for proper
alignment.
• Check flue and air inlet
piping for blockage,
proper length, elbows,
and termination. Correct
as necessary.
• Check rollout limit.
Replace if necessary.
• Check induced draft
blower for proper
performance. Replace, if
necessary.
• Tighten or correct wiring
connection.
• Repair short in 24 volt AC
control/safety circuit(s).
• Replace integrated
control module fuse (3A).
• Sand flame sensor.
• Inspect for proper sensor
alignment.
• Compare current gas
pressure to rating plate
info. Adjust as needed.
• Review wiring diagram to
correct polarity.
• Verify proper ground.
Correct if necessary.
• Reverse red and blue
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.
• 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.