Installation Manual
42
• Circulator blower runs
continuously. No furnace
operation.
• Integrated control module
diagnostic
• Primary or auxil-
iary limit circuit
is open.
• Check primary/auxiliary
limit. Replace if necessary.
or remove obstruction.
• Check circulator blower
speed and performance.
Correct speed or replace
blower if necessary.
• Tighten or correct wiring
connection.
repair.
• Replace primary/auxiliary
limit with proper replace-
ment part.
• Replace blower with cor-
rect replacement part.
4
-
ry limit switch.
air over the heat ex-
restrictive ductwork, im-
proper circulator blower
speed, or failed circulator
blower.
• Loose or improperly
connected wiring.
• Normal furnace operation.
• Integrated control module
diagnostic
microamp signal
is low.
• Inspect for proper sensor
alignment.
• Compare current gas pres-
sure to rating plate info.
Adjust as needed.
wool.
for piping details.
• See rating plate for proper gas
pressure.
7
-
dized.
improper gas pressure or
combustion air.
• Induced draft blower and
circulation blower runs
continuously. No furnace
operation.
• Integrated control module
diagnostic
no call for heat.
wiring.
repair.
5
5 FLASHES
circuit.
• Integrated control module
diagnostic
• No furnace operation.
• Rollout limit
open.
•Integrated control
module fuse is
blown.
• Check burners for proper
alignment.
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.
for piping details.
•Replace induced draft blower
with correct replacement
part.
•Replace integrated control
module fuse with 3A automo-
tive fuse.
• Read precautions in “Electro-
manual.
• Replace rollout limit with
correct replacement part.
6
• Misaligned burners, blocked
failed induced draft blower.
• Loose or improperly connect-
ed wiring.
• Short in 24 volt AC control
circuits or safety circuits.
• Integrated control module
diagnostic
.
• Polarity of 115
or 24 volt pow-
er is reversed.
• Review wiring diagram to
correct polarity.
• Reverse orange and gray wires
going to transformer.
if necessary.
repair.
• Polarity of 115 volt AC power
to furnace or integrated con-
trol module is reversed.
• Orange and gray wires to
transformer are reversed.
• Poor unit ground.
C
CONTINUOUS/
7
8
• Integrated control module
diagnostic
• Problem with
igniter circuit.
•Improperly connected igniter.
• Bad igniter.
• Poor unit ground.
• Poor burner ground.
module.
•Check and correct wiring
from integrated control
module to igniter.
•Replace bad igniter.
wire.
•Replace bad integrated
control module.
repair.
• Replace igniter w/proper
replacment part.
• Read precautions in “Electro-
manual.
• Normal operation.
• Circulating blowers not
operating simultaneously.
No blower operation.
C
9
wiring.
• Isolating relay not used or
improperly installed
-
ing twin terminals, check
continuity of wiring.
motor is operable without
twinning connection.
in this installation manual
with corrections.