Bryant 581B Troubleshooting Unit Troubleshooting, LED Error Code Service Analysis, Led Off

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TROUBLESHOOTING

I. UNIT TROUBLESHOOTING

Refer to Tables 32-36.

Table 32 — LED Error Code Service Analysis

SYMPTOM

CAUSE

REMEDY

Hardware Failure

Loss of power to control module (IGC).

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

(LED OFF)

 

transformer. Units without a 24-v circuit breaker have an internal

 

 

overload in the 24-v transformer. If the overload trips, allow

 

 

10 minutes for automatic reset.

Fan ON/OFF Delay Modified

High limit switch opens during heat

IGC board has modified either blower on delay time or blower off

(LED/FLASH)

exchanger warm-up period before fan-on

delay time.

 

delay expires.

 

 

Limit switch opens within three minutes

 

 

after blower-off delay timing in Heating mode.

 

Limit Switch Fault

High temperature limit switch is open.

Check the operation of the indoor (evaporator) fan motor.

(LED 2 Flashes)

 

Ensure that the supply-air temperature rise is in accordance with

 

 

the range on the unit nameplate.

Flame Sense Fault

The IGC sensed flame that should not be

Reset unit. If problem persists, replace control board.

(LED 3 Flashes)

present.

 

4 Consecutive Limit

Inadequate airflow to unit.

Check operation of indoor (evaporator) fan motor and that supply-air

Switch Faults

 

temperature rise agrees with range on unit nameplate information.

(LED 4 Flashes)

 

 

Ignition Lockout

Unit unsuccessfully attempted ignition for

Check ignitor and flame sensor electrode spacing, gaps, etc.

(LED 5 Flashes)

15 minutes.

Ensure that flame sense and ignition wires are properly routed

 

 

and terminated. Verify that unit is obtaining proper amount of gas.

Induced-Draft Motor Fault

IGC does not sense that induced-draft

Check for proper voltage. If motor is operating, check the

(LED 6 Flashes)

motor is operating.

speed sensor plug/IGC Terminal J2 connection. Proper

 

 

connection: PIN 1— White, PIN 2 — Red, PIN 3 — Black.

Rollout Switch Fault

Rollout switch has opened.

Rollout switch will automatically reset, but IGC will continue to

(LED 7 Flashes)

 

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

If error code is not cleared by resetting unit power, replace the IGC.

(LED 8 Flashes)

software or hardware.

 

Temporary Software

Electrical interference is impeding the IGC

Reset 24-v to control board or turn thermostat off and then on.

Lockout

software.

Fault will automatically reset itself in one hour.

(LED 9 Flashes)

 

 

CAUTION: If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that may be present before handling new control board. The IGC is sensitive to static electricity and may be damaged if the necessary pre- cautions are not taken.

IMPORTANT: Refer to heating troubleshooting for additional heating section troubleshooting information.

LEGEND

IGC — Integrated Gas Unit Controller

LED — Light-Emitting Diode

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Contents Safety Considerations ContentsInstallation Provide Unit SupportIII. Determine Location of Drain Line and External Trap II. Field Fabricate DuctworkCRBTMPWR001A01 Roof Curb Unit Size Accessory CRRFCURB001A01CRBTMPWR002A01 CRBTMPWR003A01VI. Install GAS Piping Install Flue HoodIV. RIG and Place Unit Positioning581B 036 Unit Operating Weight048 060Physical Data 581B036-072 Furnace Section LOSS-OF-CHARGE SWITCH/LOW-PRESSUREFreeze Protection Thermostat OUTDOOR-AIR Inlet ScreensBase Unit Dimensions 581B036-072 Field Control Wiring Field Power SupplyHeat Anticipator Settings Steel Pipe Spacing of Supports Nominal Diameter DimensionLow-Voltage Connections With or Without Economizer Power Wiring ConnectionsFAN Motor Power Exhaust MCA MocpDisconnect SIZE† RLA LRA FLA MCA MocpFAN Motor Supply SIZE†Disconnect Switch VIII. Adjust FACTORY-INSTALLED OptionsPerfect Humidity Dehumidification System LPSManual Outdoor-Air Damper Damper Panel with Manual Outdoor-Air Damper InstalledOptional Manual Outdoor-Air Damper With Hood Attached EconoMi$er IV Standard Sensors Indoor Coil Access Panel RelocationBarometric Flow Capacity Supply Air Sensor Temperature/Resistance Values EconoMi$er IV Control ModesEconoMi$er IV Sensor Usage Return Air Temperature or Enthalpy Sensor Mounting Location Enthalpy Changeover Set Points Page IX. Adjust EVAPORATOR-FAN Speed 581B Fan Rpm at Motor Pulley Setting With Standard Motor581B Fan Rpm at Motor Pulley Setting With High-Static Motor Unit Maximum Unit Voltage Phase Continuous BHP581B AMP DrawAccessory/FIOP EconoMi$er IV Static Pressure* in. wg Outdoor Sound Power Total UnitEvaporator-Fan Motor Data High-Static Motors 1265 1294 1175 1346 1275 1400 1147 9721320 1310 1371 1419 1500 1175 1086 1292670 666 257 778 367 871 471 952 572701 306 810 426 901 540 981 651 7601803 16491470 1784 19671008 643 967 563805 1049 731782 316 870 417 948 Rpm Bhp Watts 900 553 1341000 582 163 807 358 894 466 971675 277 643 234 762707 326 740 382839 412 938 505 1030 605 800 350 904 438 999 535879 483 974 580 919 561753 800 350 904 438 999 535 1087 640839 412 938 505 1030 605 1115 714 829General FAN Performance Notes VII. Refrigerant Service Ports VI. Internal WiringPRE-START-UP START-UP Unit PreparationCooling XI. Main BurnersXII. Heating XV. Operating Sequence XIII. Safety ReliefThermostat Input Economizer Function 581B Unit Operation Perfect Humidity Normal Design Cooling OperationIV. ECONOMI$ER IV Adjustment Service CleaningVI. HIGH-PRESSURE Switch VII. LOSS-OF-CHARGE SwitchLow Charge Cooling To Use Cooling Charging Chart, Standard UnitPerfect Humidity System Charging Unit 581BCooling Charging Chart, Standard 581B036 Condenser FAN Must be Operating XV. Replacement Parts XII. Limit SwitchFlue GAS Passageways XI. COMBUSTION-AIR BlowerMedium High Heat Units LOW Heat UnitsOLR CAPCLO CompLED Error Code Service Analysis Troubleshooting Unit TroubleshootingSymptom Cause Remedy LED OFFProblem Cause Remedy Heating Service AnalysisProblem Cause Remedy Cooling Service AnalysisII. ECONOMI$ER IV Troubleshooting EconoMi$er IV Input/Output Logic EconoMi$er IV Troubleshooting CompletionInputs Outputs Demand Control EnthalpyIndex Page Temperatures START-UP ChecklistPreliminary Information III. START-UP Electrical
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