Table 36 — EconoMi$er Troubleshooting

PROBLEM

CAUSE

REMEDY

Damper does not open.

Indoor (evaporator) fan is Off.

Check to ensure that 24 vac is present at terminal C1 (Common Power) on the

 

 

 

IFC (Indoor Evaporator Fan Contactor) or that 24 vac is present at the IFO

 

 

 

(Indoor Evaporator 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 24V COM

 

 

controller.

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

Minimum position set incorrectly.

Verify that the MIN POS (%) is set greater than zero. Adjust MIN POS (%) to

limited to minimum

 

100% to verify operation, and then set to correct setting.

position.

 

 

 

 

EconoMi$er changeover set-

Set at correct value. See Table 3.

 

 

point set too high or too low.

 

 

 

Supply-Air Temperature Sensor

If STATUS light is flashing four flashes, the Supply-Air Temperature Sensor is

 

 

faulty.

faulty. Check wiring or replace sensor.

 

 

OAT Sensor faulty

If STATUS light is flashing five flashes, the OAT sensor is faulty. Check wiring or

 

 

 

replace sensor.

Damper position less

Supply-Air Low Limit Strategy

The supply-air temperature is less than 45 F, causing the minimum position to

than minimum position

controlling.

decrease. Refer to the Start-Up instructions. Verify correct setting of MIN POS

set point.

 

(%). If correct, EconoMi$er is operating correctly.

Damper does not return

CO2 Ventilation Strategy

If CO2 sensor is being used, and the damper position is greater than minimum

to minimum position.

controlling

position, the ventilation control strategy is controlling. Refer to the Start-Up

 

instructions. EconoMi$er is operating correctly.

 

 

 

Damper does not close

Damper travel is restricted.

Check to ensure the damper is not blocked.

on power loss.

 

 

LEGEND

 

 

OAT — Outdoor-Air Temperature

47

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Carrier 48TF004-007 specifications EconoMi$er Troubleshooting
Page 46 Page 48

48TF004-007 specifications

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