Bryant 582A - Manual (Page 32)

TABLE 18—TROUBLESHOOTING GUIDE–LED ERROR CODES
SYMPTOM CAUSE REMEDY
Hardware failure.
(LED OFF)
Loss of power to control module (IGC)*.
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 transformer. If the overload trips, allow 10 min-
utes
for automatic reset.
Fan ON/OFF delay modified
(LED/FLASH)
High limit switch opens during heat
exchanger warm-up period before fan-on
delay expires.
Limit switch opens within three minutes
after blower-off delay timing in Heating mode.
Ensure unit is fired on rate; ensure temperature rise is correct.
Ensure unit’s external static pressure is within application guidelines.
Limit switch faults.
(LED 2 flashes)
High temperature limit switch is open.
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.
Flame sense fault.
(LED 3 flashes) The IGC* sensed flame that should not be
present.
Reset unit. If problem persists, replace control board.
4 consecutive limit switch faults.
(LED 4 flashes)
Inadequate airflow to unit
Check operation of indoor (evaporator) fan motor and that supply-air
temperature rise agrees with range on unit nameplate information.
Ignition lockout.
(LED 5 flashes) Unit unsuccessfully attempted ignition for
15 minutes.
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.
Induced-draft motor fault.
(LED 6 flashes) IGC does not sense that induced-draft
motor is operating.*
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 fault.
(LED 7 flashes)
Rollout switch has opened.
Rollout switch will automatically reset, but IGC* will continue to lock-
out unit. Check gas valve operation. Ensure that induced-draft
blower wheel is properly secured to motor shaft. Reset unit at unit
disconnect.
Rollout control fault.
(LED 8 flashes) Microprocessor has sensed an error in the
software or hardware.
If error code is not cleared by resetting unit power, replace the IGC*.
Temporary software lock out.
(LED 9 flashes) Electrical interference
impeding IGC software
Reset 24-v. to control board or turn thermostat off,
then on again. Fault will automatically
reset itself in one (1) hour.
* 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.
IMPORTANT: Refer to Table 17—Troubleshooting Guide—Heating for additional troubleshooting analysis.
LEGEND
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode
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