Amana AMS95 Installation Instructions Manual page 35

Associated
Symptoms of Abnormal
Operation
LED Code
• Circulator blower runs
continuously. No furnace
operation.
• Integrated control module
4 FLASHES
diagnostic LED is
flashing FOUR (4)
flashes.
• Induced draft blower
and circulation blower
run continuously. No
furnace operation.
• Integrated control module
5 FLASHES
diagnostic LED is
flashing FIVE (5) flashes.
• Circulator blower runs
continuously. No furnace
operation.
• Integrated control module
6 FLASHES
diagnostic LED is
flashing SIX (6) flashes.
• Normal furnace
operation.
• Integrated control module
diagnostic LED is
7 FLASHES
flashing SEVEN (7)
flashes.
• Furnace not operating.
• Integrated control module
diagnostic LED is
flashing EIGHT (8)
8 FLASHES
flashes.
• Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing continuously.
CONTINUOUS/
RAPID FLASH
Troubleshooting Chart
Fault Description(s)
2
• Primary or auxiliary
limit circuit is open.
4
• Flame sensed with
5
no call for heat.
• Rollout limit circuit is
open.
6
• Flame sense
microamp signal is
7
low.
• Problem with igniter
circuit.
8
• Polarity of 115 or 24
volt power is
C
reversed.
Possible Causes
• Insufficient conditioned air
over the heat exchanger.
Blocked filters, restrictive
ductwork, improper
circulator blower speed, or
failed circulator blower.
• Faulty primary or auxiliary
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.
• 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.
• Improperly connected
igniter.
• Bad igniter.
• Poor unit ground.
• Polarity of 115 volt AC
power to furnace or
integrated control module is
reversed.
• Orange and gray wires to
transformer are reversed.
• Poor unit ground.
35
Corrective Action Cautions and Notes
• Turn power OFF
• Check primary/
prior to repair.
auxiliary limit. Replace
if necessary. • Replace primary/
auxiliary limit
• Check filters and
switch with proper
ductwork for block-
replacement part.
age. Clean filters or
remove obstruction. • Replace blower
with correct
• Check circulator
replacement part.
blower speed and
performance. Correct
speed or replace
blower if necessary.
• Tighten or correct
wiring connection.
• Correct short at flame • Turn power OFF
sensor or in flame prior to repair.
sensor wiring.
• Check burners for • Turn power OFF
proper alignment. prior to repair.
• Check flue and air inlet • See "Vent/Flue
piping for blockage, Pipe" section for
proper length, elbows, piping details.
and termination.
• Replace rollout limit
Correct as necessary.
with correct
• Check induced draft replacement part.
blower for proper • Replace induced
performance. Replace, draft blower with
if necessary. correct replace-
ment part.
• Tighten or correct
wiring connection.
• Sand flame sensor is • Turn power OFF
coated/oxidized. prior to repair.
• Inspect for proper • Sand flame sensor
sensor alignment. with emery clot.
• Check inlet air piping • See "Vent/Flue
for blockage, proper Pipe" section for
length, elbows, and piping details.
termination.
• Compare current gas • See rating plate for
pressure to rating proper gas
plate info. Adjust as pressure.
• Check and correct • Turn power OFF
wiring from integrated prior to repair.
control module to
igniter.
• Replace bad igniter. • Replace igniter with
proper silicon
• Check and correct unit
nitride replacement
ground wiring.
part.
• Review wiring diagram • Turn power OFF
to correct polarity. prior to repair.
• Reverse orange and
gray wires connected
to transformer.
• Verify proper ground.
Correct if necessary.