Installation Guide

29
I&O manual
TROUBLE SHOOTING CHART
Symptoms of
Abonormal Operation
Associated
LED
Fault Description(s)
Possible reason
Corrective Action
Cautions and Notes
1 Integrated control module will automatically attempt to reset from lockout after one hour.
2 LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.
• Induced draft blower
and circulator blower
runs continuously.
• No furnace operation.
Integrated control
module diagnostic
LED is flashing
continuously.
6
FLASHES
5
FLASHES
7
FLASHES
• Flame sensed with
no call for heat.
• Short to ground in flame
sense circuit.
• Correct short at flame
sensor or in flame
sensor wiring
Turn power OFF prior
to repair.
• Furnace fails to
operate.
• Integrated control
module diagnostic
LED is flashing
FIVE (5) flashes.
• Rollout limit open.
• Flame rollout.
• Misaligned burners，
blocked flue or failed
induced draft blower.
• Loose or improperly
connected wiring.
Faulty rollout limit.
• 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.
• See "Vent Flue Pipe"
section for piping details.
• Replace induced draft
blower with proper
replacement part.
• Replace rollout limit with
correct replacement part.
• Normal furnace
• Integrated control
module diagnostic
LED is flashing
SEVEN (7) flashes.
• Flame sense
microamp signal
is low
• Flame sensor is coated
/oxidized.
• Flame sensor incorrectly
positioned in burner
flame.
• Lazy burner flame due
to Improper gas pressure
or combustion air.
• Sand flame sensor.
• Inspect for proper sensor
alignment.
• Compare current gas
pressure to rating plate
info. Adjust as needed.
• Turn power OFF prior to
repair.
• Clean flame sensor with
steel wool.
• See "VenVFlue Pipe"
section for piping details.
• See rating plate for proper
gas pressure.
•Induced draft blower
runs continuously.
•No furnace operation.
• Integrated control
module diagnostic
LED is flashing
SIX(6) flashes.
Continuous
FLASHES
• Polarity of 115
Volt power is
reversed
• Improper grounding
• 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.
•Review wiring diagram to
correct polarity.
• Verify proper ground.
Correct if necessary
• Reverse red and blue
wires connected to
transformer.
• Turn power OFF prior
to repair.
• Internal control
failure
• Internal control
failure
• Wrong electric power
frequency
• Internal control
failure
• Check electric power
frequency
• Change control board
Turn power OFF prior
to repair.
Constant
ON