Bryant 580F installation instructions II. Unit Troubleshooting

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

SYMPTOM	CAUSE	REMEDY
Hardware Failure.	Loss of power to control module (IGC).	Check 5 amp fuse on IGC, power to unit, 24-v circuit breaker, and
(LED OFF)		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	High limit switch opens during heat	Ensure unit is fired on rate and temperature rise is correct.
(LED/FLASH)	exchanger warm-up period
	before fan-on delay expires.
	Limit switch opens within three	Ensure unit’s external static pressure is within application guidelines.
	minutes after blower-off delay
	timing in Heating mode.
Limit Switch Fault.	High temperature limit switch is open.	Check the operation of the indoor (evaporator) fan motor.
(LED 2 flashes)		Ensure that the supply-air temperature rise is in accordance with the range on the
		unit nameplate.
Flame Sense Fault.	The IGC sensed flame that	Reset unit. If problem persists, replace control board.
(LED 3 flashes)	should not be present.
4 Consecutive Limit Switch Faults.	Inadequate airflow to unit.	Check operation of indoor (evaporator) fan motor and that supply-air
(LED 4 flashes)		temperature rise agrees with range on unit nameplate information.
Ignition Lockout.	Unit unsuccessfully attempted	Check ignitor and flame sensor electrode spacing, gaps, etc.
(LED 5 flashes)	ignition for 15 minutes.	Ensure that flame sense and ignition wires are properly terminated.
		Verify that unit is obtaining proper amount of gas.
Induced-Draft Motor Fault.	IGC does not sense that	Check for proper voltage. If motor is operating, check the
(LED 6 flashes)	induced-draft motor is operating.	speed sensor plug/IGC Terminal J2 connection. Proper
		connection: PIN 1— White, PIN 2 — Red, PIN 3 — Black.
Rollout Switch Fault.	Rollout switch has opened.	Rollout switch will automatically reset, but IGC will continue to lock
(LED 7 flashes)		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.	Microprocessor has sensed an	If error code is not cleared by resetting unit power, replace the IGC.
(LED 8 flashes)	error in the software or hardware.
Temporary Software Lockout	Electrical interference is impeding the IGC	Reset 24-v to control board or turn the thermostat off and on. Fault will automatically
(LED 9 flashes)	software	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.

IMPORTANT: Refer to Heating troubleshooting chart for additional troubleshoot- ing analysis.

LEGEND

IGC — Integrated Gas Unit Controller

LED — Light-Emitting Diode

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