Carrier 48TF004-007 specifications EconoMi$er Troubleshooting

Page 47

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

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Contents Installation, Start-Up, Service Instructions Rig and Place Unit Inspect unit for Field Fabricate Ductwork Secure allRoof Curb Dimensions Install Gas Piping Unit is equipped for Install Flue Hood Flue hood is shippedUnit Size 48TF Physical Data 48TF004-007Furnace Section Base Unit Dimensions Or larger Make Electrical ConnectionsSteel Pipe Nominal Diameter FeetAHA Terminal BlockRLA LRA Electrical DataSupply Size Type FLAPosition Setting Make Outdoor-Air Adjustments and Install Outdoor-Air HoodTypical Access Panel Locations Horizontal Discharge Block-Off Plate Wiring Connections for Outdoor-Air Thermostat Completed Hood Assembly EconoMi$er Wiring Wiring Diagram for Power Exhaust System Chan geover Set Points Default Potentiometer Settin gsSettings Potentiometer Default Setting CO2 SP PPMDirect Drive Motor Mounting Adjust Evaporator-Fan Speed AdMotor Data Fan Rpm at Motor Pulley SettingsAccessory/FIOP Static Pressure* in. wg 48TF004-007 48TF004 3 Tons Alternate Motor Belt Drive 48TF004 3 Tons Standard Motor Direct Drive48TF005 4 Tons Standard Motor Direct Drive 48TF004 3 Tons HIGH-STATIC Motor Belt Drive48TF005 4 Tons Alternate Motor Belt Drive 48TF006 5 Tons Alternate Motor Belt Drive 48TF006 5 Tons Standard Motor Direct Drive48TF006 5 Tons HIGH-STATIC Motor Belt Drive 48TF007 6 Tons Standard Motor Belt Drive 48TF007 6 Tons HIGH-STATIC Motor Belt Drive 229 109149 189938 10281064 100548TF005 4 Tons Alternate Motor Belt Drive 48TF005 4 Tons HIGH-STATIC Motor Belt Drive 1900 894 567 1600 770 420 826 4831700 811 494 865 567 1800 852 5781700 865 567 966 725 1051 883 1133 1061 1205 12211600 826 483 931 641 1020 788 1101 956 1178 12521015 891 1063 998 885 623 942 700928 700 982 779 971 787 1022 8672200 1104 1081 1159 1106 1229 1258 1900 982 779 1084 932 1160 1006 1223 11142000 1022 867 1121 1014 1188 1097 1254 1216 2100 1063 998 1140 1064 1196 1272 1292Nominal Input HeatingAltitude Compensation Btuh NominalPage Service Lubrication Economizer Adjustment Refer to Optional EconoTON Unit Charging Chart TON Unit 60 Hz Charging Chart Cooling Charging Chart, 48TF006Flashes LED Error Code DescriptionLED Indication Error Code Description OFFBurner Tray Details LED OFF LED Error Code Service AnalysisHeating Service Analysis Problem Cause RemedyCooling Service Analysis IFC Durablade Economizer TroubleshootingEconoMi$er Troubleshooting Typical Wiring Diagram and Component Arrangement SW1 SATCAP SENCopyright 2000 Carrier Corporation Page Preliminary Information Remove and Use in Job File

48TF004-007 specifications

The Carrier 48TF004-007 is part of the brand's renowned rooftop unit series, designed to deliver efficient, reliable performance for commercial applications. Ideal for spaces such as offices, retail stores, and small manufacturing facilities, these units encapsulate advanced technology to enhance indoor air quality and optimize climate control.

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