Bryant 582A Series Installation, Start-Up And Service Instructions Manual page 35

SYMPTOM
Hardware failure.
(LED OFF)
Limit switch fault.
(LED 2 flashes)
Flame sense fault.
(LED 3 flashes)
4 consecutive limit switch
faults.
(LED 4 flashes)
Ignition lockout.
(LED 5 flashes)
Induced-draft motor fault.
(LED 6 flashes)
Rollout switch fault.
(LED 7 flashes)
Internal control fault.
(LED 8 flashes)
WARNING:
If the IGC must be replaced, be sure to ground
yourself to dissipate any electrical charge that may be present
before handling new control board. The IGC is sensitive to static
electricity and may be damaged if the necessary precautions are
not taken.
LED Troubleshooting — Error Code
CAUSE
Loss of power to control module
(IGC).
High temperature limit switch is
open.
The IGC sensed flame that
should not be present.
Inadequate airflow to unit.
Unit unsuccessfully attempted
ignition for 15 minutes.
IGC does not sense that induced-
draft motor is operating.
Rollout switch has opened.
Microprocessor has sensed an
error in the software or hardware.
—35—
Check 5 amp fuse on IGC, power to unit, 24-v circuit
breaker, and transformer. Units without a 24-v circuit
breaker have an internal overload in the 24-v trans-
former. If the overload trips, allow 10 minutes for au-
tomatic reset.
Check the operation of the indoor (evaporator) fan
motor. Ensure that the supply-air temperature rise is
in accordance with the range on the unit nameplate.
Reset unit. If problem persists, replace control board.
Check operation of indoor (evaporator) fan motor and
that supply-air temperature rise agrees with range on
unit nameplate information.
Check ignitor and flame sensor electrode spacing,
gaps, etc. Ensure that flame sense and ignition wires
are properly terminated. Verify that unit is obtaining
proper amount of gas.
Check for proper voltage. If motor is operating, check
the speed sensor plug/IGC Terminal J2 connection.
Proper connection: PIN 1 — White, PIN 2 — Red,
PIN 3 — Black.
Rollout switch will automatically reset, but IGC will
continue to lockout unit. Check gas valve operation.
Ensure that induced-draft blower wheel is properly
secured to motor shaft. Reset unit at unit disconnect.
If error code is not cleared by resetting unit power,
replace the IGC.
IMPORTANT: Refer to Heating troubleshooting chart for additional trouble-
shooting analysis.
LEGEND
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode
REMEDY