Carrier 48TJD008-014, 48TJE008-014 LED Error Code Service Analysis, Problem Cause Remedy, Led Off

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TROUBLESHOOTING

Table 17 Ð LED Error Code Service Analysis

PROBLEM

CAUSE

REMEDY

Hardware failure.

Loss of power to control module (IGC).

Check 5-amp fuse on IGC, power to unit, 24-v circuit

(LED OFF)

 

breaker, and transformer. Units without a 24-v circuit

 

 

breaker have an internal overload in the 24-v trans-

 

 

former. If the overload trips, allow 10 minutes for auto-

 

 

matic reset.

Limit switch fault.

High temperature limit switch is open.

Check the operation of the indoor (evaporator) fan mo-

(LED 2 ¯ashes)

 

tor. Ensure that the supply-air temperature rise is in ac-

 

 

cordance with the range on the unit nameplate.

Flame sense fault.

The IGC sensed ¯ame that should not be present.

Reset unit. If problem persists, replace control board.

(LED 3 ¯ashes)

 

 

4 consecutive limit

Inadequate air¯ow to unit.

Check operation of indoor (evaporator) fan motor and

switch trips.

 

that supply-air temperature rise agrees with range on

(LED 4 ¯ashes)

 

unit nameplate information.

Ignition lockout.

Unit unsuccessfully attempted ignition for 15 minutes.

Check ignitor and ¯ame sensor electrode spacing, gaps,

(LED 5 ¯ashes)

 

etc. Ensure that ¯ame sense and ignition wires are prop-

 

 

erly terminated. Verify that unit is obtaining proper

 

 

amount of gas.

Induced-draft motor

IGC does not sense that induced-draft motor is

Check for proper voltage. If motor is operating, check

fault.

operating.

the speed sensor plug/IGC Terminal J2 connection.

(LED 6 ¯ashes)

 

Proper connection: PIN 1 Ð White, PI N 2 Ð Red, PIN 3

 

 

Ð Black.

Rollout switch fault.

Rollout switch has opened.

Rollout switch will automatically reset, but IGC will con-

(LED 7 ¯ashes)

 

tinue to lock 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 error in the software or

If error code is not cleared by resetting unit power, re-

(LED 8 ¯ashes)

hardware.

place the IGC.

LEGEND

IGC Ð Integrated Gas Unit Controller

LED Ð Light-Emitting Diode

If the IGC must be replaced, be sure to ground yourself to dis- sipate any electrical charge that may be present before han- dling new control board. The IGC is sensitive to static electricity and may be damaged if the necessary precautions are not taken.

IMPORTANT: Refer to Table 21 Ð Heating Service Troubleshoot- ing for additional troubleshooting information.

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Contents Installation, Start-Up Service Instructions Horizontal Conversion Panels Install External Trap for CondensateGAS Connection Package Power Control Connector``D ALT Drain Hole Accessory Unit SizeUnit Leveling Tolerances Physical Data RETURN-AIR Filters Furnace SectionFreeze Protection Thermostat F² OUTDOOR-AIR Inlet ScreensBase Unit Dimensions Flue Hood Details Make Electrical ConnectionsElectrical Data IFC CompsTypical Unit Adjust Factory-Installed OptionsPosition Setting Durablade Economizer Installed in Unit Durablade Economizer Damper Minimum Position Setting Parablade Economizer Installed in Unit Enthalpy Settings for Parablade Economizer Unit Motor Pulley Turns Open Economizer Static Pressure Drop in. wg Evaporator-Fan Motor EfficiencyMotor Data Fan Performance, 48TJ009 Ð Vertical Discharge Units Fan Performance, 48TJ008 Ð Vertical Discharge UnitsAirflow Fan Performance, 48TJ014 Ð Vertical Discharge Units Fan Performance, 48TJ012 Ð Vertical Discharge UnitsFan Performance, 48TJ009 Ð Horizontal Discharge Units Fan Performance, 48TJ008 Ð Horizontal Discharge UnitsFan Performance, 48TJ014 Ð Horizontal Discharge Units Fan Performance, 48TJ012 Ð Horizontal Discharge UnitsHeating START-UPNominal Input Altitude CompensationElevation Lubrication Cleaning Condenser Coil48TJ Unit Voltage Condenser-Fan Adjustment FigFAN Height ``A Cooling Charging Chart 48TJ009 Flash² LED Error Code DescriptionLED Indication Error Code Description OFFBurner Section Details Spark Gap Adjustment Problem Cause Remedy LED Error Code Service AnalysisLED OFF Problem Cause Remedy Durablade Economizer TroubleshootingParablade Economizer Service Troubleshooting Cooling Service Troubleshooting Heating Service Troubleshooting Typical Wiring Schematic and Component Arrangement Page Copyright 1996 Carrier Corporation Page Preliminary Information Remove and Store in Job File

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