Bryant 580F - Manual (Page 70)

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Required Action
Shut the unit off and check wiring.
Reset Method
This error must be manually reset and requires a power reset.
H. Error Code 8 — E2 Test Failure
Error Criteria
This error occurs if internal hardware detects an E2 failure.
Required Action
Shut the unit off.
Reset Method
This error must be manually reset and requires a power reset.
I. Error Mode
When an error occurs, the red and yellow LEDs both come on
steady. To determine the error, follow these steps:
1. Enter the Run mode by pushing buttons #1 and #2 for
at least 3 seconds until all LEDs flash.
2. Press and release the #1 button to enter the Read
mode.
3. Push the ADVANCE/MANUAL (#2) button to
advance to item number 20, “1st Most Recent Error.”
Determine the error(s) by reading the values in items
20-24 and referring to the error codes described above.
4. Fix the error(s).
5. Press buttons 1 and 2 to exit read mode. Enter Setup
mode by pressing button #1 for at least 3 seconds
until all the LEDs flash.
6. Push button #2 to advance to item number 20.
7. To reset the error code while the green DS4 LEDS is ON,
press the READ/ADJUST (#1) button once. This resets
the error mode and erases all repaired error codes.
NOTE: Cycling power to the board will also erase the repaired
error codes.
J. RAM Test Failure
Error Criteria
If internal hardware detects a RAM failure, this alarm will be
displayed by alternately flashing DS1+DS3 and DS2+DS4.
Required Action
Shut the unit off.
Reset Method
This error must be manually reset and requires a power
reset.
K. ROM Test Failure
Error Criteria
If internal hardware detects a ROM failure, the alarm is dis-
played by alternately flashing DS1+DS2 and DS3+DS4.
Required Action
Shut the unit off.
Reset Method
This error must be manually reset and requires a power
reset.
L. Unit Always In Unoccupied Mode
A jumper wire is factory-installed to force the unit into occu-
pied configuration whenever G or Y1 are closed. Without the
jumper wire, the unit will always be in unoccupied mode.
Check the wire. An occupied/unoccupied switch may be
installed in place of the jumper. Check the wiring and setting
of the switch.
II. UNIT TROUBLESHOOTING
Refer to Tables 38-40 and Fig. 52.
Table 38 — LED Troubleshooting — Error Code
I MPORTANT: Refer to Heating troubleshooting chart for additional troubleshoot-
ing analysis.
LEGEND
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 minutes 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 and temperature rise is correct.
Ensure unit’s external static pressure is within application guidelines.
Limit Switch Fault.
(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.
Internal 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 Lockout
(LED 9 flashes) Electrical interference is impeding the IGC
software Reset 24-v to control board or turn the thermostat off and on. Fault will automatically
reset itself in one hour.
CAUTION: If the IGC must be replaced, be sure to ground your-
self 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.
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode