Damper does not open, EconoMi$er operation limited

Table 16 — EconoMi$er Troubleshooting

PROBLEM	CAUSE	REMEDY
Damper does not open.	Indoor Fan is Off.	Check to ensure that 24 vac is present at Terminal C1 (Common Power)
		on the IFC (Indoor Fan contactor) or that 24 vac is present at
		the IFO (Indoor Fan On) terminal. Check whether 24 vac is
		present at PL (Plug) 6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is
		not present, check wiring (see unit label diagram).
		Check proper thermostat connection to G on the connection board.
	No power to EconoMi$er	Check to ensure that 24 vac is present across Terminals 24 VAC and
	controller.	24V COM on the EconoMi$er control. If 24 vac is not present, check
		wiring (see unit label diagram). If 24 vac is present, STATUS light should
		be on constantly.
	No power to G Terminal.	If IFM is on, check to ensure 24 vac is present on G Terminal of the
		EconoMi$er controller. If 24 vac is not present, check wiring (see unit
		label diagram).
	Controller fault.	If STATUS light is flashing one flash, the EconoMi$er controller is
		experiencing a fault condition. Cycle power to the controller. If condition
		continues, replace the EconoMi$er controller.
	Thermostat fault.	If STATUS light is flashing two flashes, the EconoMi$er controller senses
		the thermostat is wired incorrectly. Check wiring between the thermostat
		and the connection board in the electrical panel. The fault condition is
		caused by Y2 being energized before Y1.
	Actuator Fault.	Check the wiring between the EconoMi$er controller and the actuator.
		Hold CONFIG button between three and ten seconds to verify the
		actuator’s operation. (This process takes three minutes to complete.)
EconoMi$er operation limited	Minimum position set	Verify that the MIN POS (%) is set greater than zero. Adjust
to minimum position.	incorrectly.	MIN POS (%) to 100% to verify operation, and then set to correct setting.
	EconoMi$er changeover	Set at correct value. See Table 4.
	set point set too high or
	too low.
	Supply air temperature	If STATUS light is flashing 4 flashes, the supply air temperature sensor is faulty.
	sensor faulty.	Check wiring or replace sensor.
	Outdoor air temperature sen-	If STATUS light is flashing 5 flashes, the outdoor-air temperature sensor is faulty.
	sor faulty.	Check wiring or replace sensor.
Damper position	Supply air low limit	The supply air temperature is less than 45 F, causing the minimum
less than minimum	strategy controlling.	position to decrease. Refer to the Start-Up instructions. Verify correct
position set point.		setting of MIN POS (%). If correct, EconoMi$er is operating correctly.
Damper does not return to	CO2 ventilation strategy	If a CO2 sensor is being used, and the damper position is greater than
minimum position.	controlling.	minimum position, the ventilation control strategy is controlling. Refer to
		the Start-Up instructions. EconoMi$er is operating correctly.
Damper does not close on	Damper travel is	Check to ensure the damper is not blocked.
power loss	restricted.

LEGEND

IFM — Indoor-Fan Motor

OAT — Outdoor-Air Temperature

—36—

548D specifications

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Bryant 548D Damper does not open, EconoMi$er operation limited, To minimum position

Models: 548D

Table 16 — EconoMi$er Troubleshooting

PROBLEM