Carrier Understanding IGC Board Codes and a12 Code for Reliable Refrigeration

Page 33

Table 14 – IGC Board LED Alarm Codes

LED

DESCRIPTION

ACTION TAKEN BY

RESET METHOD

PROBABLE CAUSE

FLASH

CONTROL

CODE

 

 

 

 

 

 

 

 

 

 

 

 

On

Normal Operation

 

 

 

 

 

 

 

 

 

Loss of power to the IGC. Check 5 amp

Off

Hardware Failure

No gas heating.

fuse on IGC, power to unit, 24V circuit

breaker, transformer, and wiring to the

 

 

 

 

 

 

 

 

IGC.

 

 

 

 

 

 

 

 

 

High temperature limit switch is open.

 

 

Gas valve and igniter

 

Check the operation of the indoor (evapo-

 

 

 

rator) fan motor.

2

Limit Switch Fault

Off.

Limit switch closed,

Ensure that the supply-air temperature

Flashes

Indoor fan and inducer

or heat call (W) Off.

 

 

On.

 

rise is within the range on the unit name-

 

 

 

plate. Check wiring and limit switch opera-

 

 

 

 

 

 

 

 

tion.

 

 

 

 

 

3

Flame Sense Fault

Indoor fan and inducer

Flame sense normal.

The IGC sensed a flame when the gas

Flashes

On.

Power reset for LED

valve should be closed. Check wiring,

 

 

 

reset.

flame sensor, and gas valve operation.

4

Four Consecutive Limit

No gas heating.

Heat call (W) Off.

4 consecutive limit switch faults within a

Power reset for LED

Flashes

Switch Fault

single call for heat. See Limit Switch Fault.

 

reset.

 

 

 

 

 

 

 

 

 

 

 

 

 

Unit unsuccessfully attempted ignition for

 

 

 

Heat call (W) Off.

15 minutes. Check igniter and flame sen-

5

Ignition Fault

No gas heating.

sor electrode spacing, gaps, etc. Check

Power reset for LED

flame sense and igniter wiring. Check gas

Flashes

 

 

 

reset.

valve operation and gas supply. Check

 

 

 

 

gas valve connections to IGC terminals.

 

 

 

 

BRN lead must be on Pin 11.

 

 

 

 

 

 

 

If heat off: no gas

Inducer sense nor-

Inducer sense On when heat call Off, or

6

Induced Draft Motor

inducer sense Off when heat call On.

heating.

mal, or heat call (W)

Check wiring, voltage, and operation of

Flashes

Fault

If heat on: gas valve

Off.

IGC motor. Check speed sensor wiring to

 

 

Off and inducer On.

 

 

 

IGC.

 

 

 

 

 

 

 

 

 

7

 

Gas valve and igniter

 

Rollout switch has opened. Check gas

Rollout Switch Lockout

Off.

Power reset.

valve operation. Check induced-draft

Flashes

Indoor fan and inducer

blower wheel is properly secured to motor

 

 

On.

 

shaft.

 

 

 

 

 

8

Internal Control Lockout

No gas heating.

Power reset.

IGC has sensed internal hardware or soft-

ware error. If fault is not cleared by reset-

Flashes

 

 

 

 

ting 24 v power, replace the IGC.

9

Temporary Software

No gas heating.

1 hour auto reset, or

Electrical interference is disrupting the

Flashes

Lockout

power reset.

IGC software.

 

 

 

 

 

 

LEGEND

IGC --- Integrated Gas Unit Control

LED --- Light---Emitting Diode

NOTES:

1.There is a 3---second pause between alarm code displays.

2.If more than one alarm code exists, all applicable alarm codes will be displayed in numerical sequence.

3.Alarm codes on the IGC will be lost if power to the unit is interrupted.

48TC

33

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Contents Safety Considerations Table of ContentsRoutine Maintenance Unit Arrangement and AccessGeneral What to do if you smell gasSeasonal Maintenance Supply Fan Belt-Drive Supply FAN Blower SectionCondenser Coil Maintenance and Cleaning Recommendation CoolingCondenser Coil Routine Cleaning of Coil Surfaces Periodic Clean Water RinseRemove Surface Loaded Fibers One-Row CoilCleaning the Evaporator Coil Refrigerant System Pressure Access PortsEvaporator Coil Evaporator Coil Metering DevicesPuronr R-410A Refrigerant To Use Cooling Charging ChartsRefrigerant Charge No ChargeSize Designation Nominal Tons Reference Cooling Charging ChartsCooling Charging Charts C08229 C08437 C08438 C08439 Problem Cause Remedy Cooling Service AnalysisTroubleshooting Cooling System Condenser-Fan AdjustmentConvenience Outlets CompressorSystem Smoke DetectorsController Unit Connect Primary TransformerSmoke Detector Locations SensorFiop Smoke Detector Wiring and Response Completing Installation of Return Air Smoke SensorSensor Alarm Test Procedure Sensor Alarm TestController Alarm Test Sensor and Controller TestsDirty Controller Test Procedure Controller Alarm Test ProcedureDirty Sensor Test Procedure To Configure the Dirty Sensor Test OperationDetector Cleaning Troubleshooting GAS Heating System Protective DevicesCompressor Protection Relief DeviceNatural Gas Supply Line Pressure Ranges Fuel Types and PressuresNatural Gas Manifold Pressure Ranges Liquid Propane Supply Line Pressure RangesCombustion-Air Blower Flue Gas PassagewaysCheck Unit Operation and Make Necessary Adjust- ments Cleaning and AdjustmentBurners and Igniters Main BurnersBurner Ignition Limit SwitchOrifice Replacement LED Error Code DescriptionLED Indication Error Code Description Red LED-Status Orifice Sizes IGC ConnectionsAltitude Compensation* A04-A07 Cont. Altitude Compensation* A08-A12LP Orifice Troubleshooting Heating System Minimum heating entering air temperatureAltitude Compensation* A04-A06 Low NOx Units Problem Cause Remedy Heating Service AnalysisIGC IGC Board LED Alarm CodesPremierLink Controller Premierlinkt ControlPremierLink Wiring Schematic 55 Space Temperature Sensor Wiring PremierLink Sensor Usage Space Sensor Mode56 Internal Connections Thermostat ModeLctb Indoor CO2 Sensor 33ZCSENCO2 Connections PremierLink Filter Switch Connection RTU-MP Control System Recommended CablesColor Code Recommendations RTU-MP Multi-Protocol Control Board RTU-MP System Control Wiring Diagram Outputs RTU-MP Controller Inputs and OutputsRTU-MP T-55 Sensor Connections Space Temperature SPT SensorsIAQ Sensor SEN J4-2 COM J4-3 24 VAC Connecting Discrete Inputs Power Exhaust outputCommunication Wiring Protocols RTU-MP Troubleshooting LEDs on the RTU-MP show the status of certain functions LEDsTroubleshooting Alarms BACnet MS/TP AlarmsRTU-MP Driver Modbus Basic Protocol TroubleshootingManufacture Date Code Name MeaningEconoMi$er IV Component Locations Economizer SystemsEconoMi$er IV Wiring EconoMi$er IV Input/Output Logic EconoMi$erOutdoor Air Lockout Sensor Supply Air Temperature SAT SensorEconoMi$er IV Control Modes Outdoor Dry Bulb ChangeoverOutdoor Enthalpy Changeover Return Air Temperature or Enthalpy Sensor Mounting LocationExhaust Setpoint Adjustment Indoor Air Quality IAQ Sensor InputMinimum Position Control Thermostats Damper MovementOccupancy Control Demand Control Ventilation DCVEconoMi$er IV Sensor Usage CO2 Sensor ConfigurationEconoMi$er IV Preparation Differential EnthalpyWiring Diagrams 48TC Typical Unit Wiring Diagram Power A06, 208/230-3-60 48TC Unit Wiring Diagram Control A06 START-UP, General PRE-START-UPMain Burners CoolingHeating Ventilation Continuous FanSTART-UP, Premierlink Controls Field Service TestSTART-UP, RTU-MP Control Perform System Check-OutConfiguration Input InputsSpace Sensor Type Input 1 FunctionBase Unit Controls Cooling, Units Without Economizer Operating SequencesHeating, Units Without Economizer Cooling, Unit With EconoMi$erPremierLink Control Heating With EconoMi$er48TC Available Cooling Stages OAT ≤ SPT 48TC 48TC RTU-MP Sequence of Operation Loadshed Command Gas and Electric Heat UnitsLinkage Modes SchedulingLocal Schedule Always Occupied Default OccupancyBACnet Schedule BAS On/OffPower Exhaust EconomizerIndoor Air Quality Fastener Torque Values Demand LimitTorque Values Model Number Nomenclature Appendix I. Model Number SignificanceSerial Number Format Position NumberPhysical Data Cooling Tons Appendix II. Physical Data48TC*A08 48TC*A09 48TC*A12 Physical Data CoolingPhysical Data Heating LOW General Fan Performance Notes Appendix III. FAN PerformanceTon Horizontal Supply Ton Vertical SupplyCFM RPM BHP Medium Static Option High Static Option 48TC**05 48TC**05 Phase Ton Horizontal Supply1493 48TC**05 Phase Ton Vertical Supply1506 14861482 48TC**0648TC**06 Phase Ton Vertical Supply 48TC**06 Phase Ton Horizontal Supply48TC**07 Phase Ton Horizontal Supply1124 11071103 1143 1122 11621099 4971116 1093 11331263 5791247 1273Unit MOTOR/DRIVE Motor Pulley Turns Open Combo Pulley AdjustmentIFM Appendix IV. Electrical DataRange RLA LRA TypeFLA Appendix IV. Electrical DataEFF at IFM RangeRLA LRA FullNOM IFM No P.E Combustion PowerFAN Motor Exhaust Type DISC. SizeNOM Unbalanced 3-Phase Supply VoltageWiring Diagrams Appendix V. Wiring Diagram List48TC*A04 Outdoor Circuiting Appendix VI. Motormaster Sensor LocationsCatalog No 48TC---2SM 48TC*A09/12 Outdoor CircuitingPreliminary Information Unit START-UP Checklist

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