Bryant 580J*04--12 appendix Economizer Systems, IGC Board LED Alarm Codes

Table 14 – IGC Board LED Alarm Codes

LED		ACTION TAKEN BY
FLASH	DESCRIPTION		RESET METHOD	PROBABLE CAUSE
		CONTROL
CODE
On	Normal Operation	—	—	—
				Loss of power to the IGC. Check 5 amp fuse
Off	Hardware Failure	No gas heating.	—	on IGC, power to unit, 24V circuit breaker,
				transformer, and wiring to the IGC.
				High temperature limit switch is open. Check
		Gas valve and igniter Off.	Limit switch closed, or	the operation of the indoor (evaporator) fan
2 Flashes	Limit Switch Fault			motor.
		Indoor fan and inducer	heat call (W) Off.	Ensure that the supply-air temperature rise is
		On.
				within the range on the unit nameplate. Check
				wiring and limit switch operation.
		Indoor fan and inducer	Flame sense normal.	The IGC sensed a flame when the gas valve
3 Flashes	Flame Sense Fault		Power reset for LED	should be closed. Check wiring, flame sensor,
		On.
			reset.	and gas valve operation.
	Four Consecutive Limit		Heat call (W) Off.	4 consecutive limit switch faults within a single
4 Flashes		No gas heating.	Power reset for LED
	Switch Fault		reset.	call for heat. See Limit Switch Fault.
				Unit unsuccessfully attempted ignition for 15
			Heat call (W) Off.	minutes. Check igniter and flame sensor elec-
				trode spacing, gaps, etc. Check flame sense
5 Flashes	Ignition Fault	No gas heating.	Power reset for LED
				and igniter wiring. Check gas valve operation
			reset.
				and gas supply. Check gas valve connections
				to IGC terminals. BRN lead must be on Pin 11.
		If heat off: no gas	Inducer sense normal,	Inducer sense On when heat call Off, or induc-
6 Flashes	Induced Draft Motor Fault	heating.		er sense Off when heat call On. Check wiring,
		If heat on: gas valve Off	or heat call (W) Off.	voltage, and operation of IGC motor. Check
		and inducer On.		speed sensor wiring to IGC.
		Gas valve and igniter Off.		Rollout switch has opened. Check gas valve
7 Flashes	Rollout Switch Lockout	Indoor fan and inducer	Power reset.	operation. Check induced-draft blower wheel is
		On.		properly secured to motor shaft.
				IGC has sensed internal hardware or software
8 Flashes	Internal Control Lockout	No gas heating.	Power reset.	error. If fault is not cleared by resetting 24 v
				power, replace the IGC.
9 Flashes	Temporary Software	No gas heating.	1 hour auto reset, or	Electrical interference is disrupting the IGC
	Lockout		power reset.	software.

LEGEND

IGC --- Integrated Gas Unit Control

LED --- Light--- Emitting Diode

NOTES:

1.There is a 3--- second pause between alarm code displays.

2.If more than one alarm code exists, all applicable alarm codes will be displayed in numerical sequence.

3.Alarm codes on the IGC will be lost if power to the unit is interrupted.

580J

ECONOMIZER SYSTEMS

The 580J units may be equipped with a factory-installed or accessory (field-installed) economizer system. Two types are available: with a logic control system (EconoMi$er IV) and without a control system (EconoMi$er2). See Fig. 39 and Fig. 40 for component locations on each type. See Fig. 41 and Fig. 42 for economizer section wiring diagrams.

Both economizers use direct-drive damper actuators.

ECONOMI$ER IV

CONTROLLER

WIRING	OUTSIDE AIR
	TEMPERATURE SENSOR
HARNESS
	LOW AMBIENT
ACTUATOR	SENSOR

C06021

Fig. 39 - EconoMi$er IV Component Locations

33