Amana ACV9 Furnace User Manual


 
38
• Inspect
pressure
switch
hose.
Repair, if necessary.
Inspect flue and/or inlet air
piping for blockage, proper
length, elbows, and termina-
tion.
Check
drain
system.
Correct
as
necessary.
Correct pressure switch
setpoint or
contact motion.
Tighten
or
correct
wiring
connection.
Fault Description(s)
Symptoms of Abnormal
Operation
4
4 FLASHES
Associated
LED Code
2
Circulator blower runs
continuously. No furnace
operation.
Integrated control module
diagnostic LED is flashing
FOUR (4) flashes.
7
7 FLASHES
9
9 FLASHES
Normal furnace operation.
Integrated control module
diagnostic LED is flashing
SEVEN (7) flashes.
Furnace not operating.
Integrated control module
diagnostic LED is flashing
EIGHT (8) flashes.
• Furnace operating on
low stage gas with high
stage induced draft blower
• High stage circulator
blower (temperature, of
conditioned air, lower than
typical).
Integrated control module
diagnostic LED is flashing
NINE (9) flashes.
8
8 FLASHES
Primary or auxiliary
limit circuit is open.
High stage pressure
switch circuit does not
close in response to
high stage induced
draft blower operation.
Flame sense
microamp signal is
low.
Problem with
igniter circuit.
Rollout limit circuit is
open.
Insufficient conditioned air
over the heat exchanger.
Blocked filters, restrictive
ductwork, improper
circulator blower speed, or
failed circulator blower.
Flame rollout.
Misaligned burners, blocked
flue and/or air inlet pipe, or
failed induced draft blower.
Loose or improperly
connected wiring.
Possible Causes Corrective Action Cautions and Notes
Check filters and
ductwork for blockage.
Clean filters or remove
obstruction.
Check circulator blower
speed and performance.
Correct speed or replace
blower if necessary.
Check burners for proper
alignment.
Check flue and air inlet
piping for blockage,
proper length, elbows,
and termination. Correct
as necessary.
Check induced draft
blower for proper
performance. Replace, if
necessary.
Tighten or correct wiring
connection.
Turn power OFF
prior to repair.
See Product Data
Book applicable
to your model* for
allowable rise
range and proper
circulator speed.
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
Pressure switch hose blocked,
pinched or connected
improperly.
Blocked flue and/or inlet air
pipe, blocked drain system, or
weak induced draft blower.
Incorrect pressure switch
setpoint or malfunctioning
switch contacts.
Loose or improperly connected
wiring.
Sand flame sensor is
coated/oxidized.
Inspect for proper sensor
alignment.
Check inlet air piping for
blockage, proper length,
elbows, and termination.
Compare current gas
pressure to rating plate
info. Adjust as needed.
Check and correct wiring
from integrated control
module to igniter
Replace bad igniter
Check and correct unit
ground
wiring
Turn power OFF
prior to repair.
Sand flame
sensor with
emery clot.
See “Vent/Flue
Pipe” section for
piping details.
See rating plate
for proper gas
pressure.
Turn power OFF
prior to repair.
Replace igniter
with proper silicon
nitride replace-
ment part.
Turn power OFF
prior to repair.
Replace pressure
switch with proper
replacement part.
See “Vent/Flue
Pipe” section for
piping details.
Replace pressure
switch with proper
replacement part.
TRTR
TRTR
TR
OUBLESHOUBLESH
OUBLESHOUBLESH
OUBLESH
OOOO
OOOO
OO
TINTIN
TINTIN
TIN
G CHARG CHAR
G CHARG CHAR
G CHAR
TT
TT
T
Induced draft blower and
circulator blower runs
continuously. No furnace
operation.
Integrated control module
diagnostic LED is flashing
FIVE (5) flashes.
5
5 FLASHES
Flame sensed with
no call for heat.
Correct short at flame
sensor or in flame
sensor wiring.
Check for lingering
flame
Verify proper operation
of gas valve
Short to ground in flame
sense circuit.
Lingering burner flame.
Slow closing gas valve
Turn power OFF
prior to repair.
C
CONTINUOUS
FLASHING
Furnace fails to operate.
Integrated control module
diagnostic LED is flashing
SIX (6) flashes.
Polarity of 115 volt
power is reversed.
Polarity of 115 volt AC
power to furnace or
integrated control module is
reversed.
Poor unit ground.
Review wiring diagram to
correct polarity.
Verify proper ground.
Correct if necessary.
Check and correct wiring.
Turn power OFF
prior to repair.