Carrier 48/50PD05 manual IGC Board LED Alarm Codes, Electric Heat Service Analysis, Led, Flash

Page 36

48/50PD

Table 13 — IGC Board LED Alarm Codes

LED

DESCRIPTION

ACTION TAKEN BY

RESET METHOD

PROBABLE CAUSE

FLASH

CONTROL

CODE

 

 

 

 

 

 

 

On

Normal Operation

—

—

—

Off

Hardware Failure

No gas heating.

—

Loss of power to the IGC. Check 5 amp fuse on

 

 

 

 

IGC, power to unit, 24V circuit breaker, transformer,

 

 

 

 

and wiring to the IGC.

1 Flash

Indoor Fan On/Off Delay

5 seconds subtracted from

Power reset.

High temperature limit switch opens during heat

 

Modified

On delay.

 

exchanger warm-up period before fan-on delay

 

 

5 seconds added to Off

 

expires.

 

 

delay (3 min max).

 

High temperature limit switch opens within

 

 

 

 

10 minutes of heat call (W) Off.

 

 

 

 

See Limit Switch Fault.

2 Flashes

Limit Switch Fault

Gas valve and igniter Off.

Limit switch closed, or

High temperature limit switch is open. Check the

 

 

Indoor fan and inducer On.

heat call (W) Off.

operation of the indoor (evaporator) fan motor.

 

 

 

 

Ensure that the supply-air temperature rise is within

 

 

 

 

the range on the unit nameplate. Check wiring and

 

 

 

 

limit switch operation.

3 Flashes

Flame Sense Fault

Indoor fan and inducer On.

Flame sense normal.

The IGC sensed a flame when the gas valve should

 

 

 

Power reset for LED reset.

be closed. Check wiring, flame sensor, and gas

 

 

 

 

valve operation.

4 Flashes

Four Consecutive Limit Switch

No gas heating.

Heat call (W) Off.

4 consecutive limit switch faults within a single call

 

Fault

 

Power reset for LED reset.

for heat. See Limit Switch Fault.

5 Flashes

Ignition Fault

No gas heating.

Heat call (W) Off.

Unit unsuccessfully attempted ignition for 15 minutes.

 

 

 

Power reset for LED reset.

Check igniter and flame sensor electrode spacing,

 

 

 

 

gaps, etc. Check flame sense and igniter wiring.

 

 

 

 

Check gas valve operation and gas supply.

6 Flashes

Induced Draft Motor Fault

If heat off: no gas heating.

Inducer sense normal, or

Inducer sense On when heat call Off, or inducer

 

 

If heat on: gas valve Off

heat call (W) Off.

sense Off when heat call On. Check wiring, voltage,

 

 

and inducer On.

 

and operation of IGC motor. Check speed sensor

 

 

 

 

wiring to IGC.

7 Flashes

Rollout Switch Lockout

Gas valve and igniter Off.

Power reset.

Rollout switch has opened. Check gas valve

 

 

Indoor fan and inducer On.

 

operation. Check induced-draft blower wheel is

 

 

 

 

properly secured to motor shaft.

8 Flashes

Internal Control Lockout

No gas heating.

Power reset.

IGC has sensed internal hardware or software error.

 

 

 

 

If fault is not cleared by resetting 24 v power,

 

 

 

 

replace the IGC.

9 Flashes

Temporary Software Lockout

No gas heating.

1 hour auto reset, or

Electrical interference is disrupting the IGC

 

 

 

power reset.

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.

Table 14 — Electric Heat Service Analysis

PROBLEM

 

CAUSE

REMEDY

Heat Will Not Turn On.

 

Unit is not configured for heat.

Check heating configurations using ComfortLinkt

 

 

 

Scrolling Marquee.

 

 

Active alarm.

Check active alarms using ComfortLink™ Scrolling

 

 

 

Marquee.

 

 

No power to unit.

Check power supply, fuses, wiring, and circuit breakers.

 

 

Unit is in minimum heat off---time, or minimum

Check using ComfortLinkt Scrolling Marquee.

 

 

cool---heat changeover time.

 

 

 

Heat forced off in Service Test.

Check using ComfortLinkt Scrolling Marquee. Turn

 

 

 

Service Test mode off.

 

 

No 24 vac at heater contactor.

Check transformer, circuit breaker, auto---reset limit

 

 

 

switches on heater, and manual---reset limit switches (LS)

 

 

 

on indoor fan housing.

 

 

Open temperature limit switch on heater.

Check minimum airflow. Check limit switch when it is cool,

 

 

 

replace if not.

Inadequate Heating.

 

Dirty air filters.

Replace air filters.

 

 

Bad heater elements.

Power off unit and remove high voltage wires. Check

 

 

 

resistance of element, replace if open.

 

 

Occupancy schedule set point set too low.

Check setpoints and adjust if necessary.

 

 

Heat undersized for load.

Decrease load or increase size of heater.

 

 

Restricted or low airflow.

Remove restriction, verify proper fan speed operation, and

 

 

 

check SAT compared to the SAT heating limits.

 

 

Too much outdoor air.

Check economizer position and configuration. Adjust

 

 

 

minimum position if needed using ComfortLinkt Scrolling

 

 

 

Marquee. Verify proper fan speed operation.

 

 

Limit switch cycles heaters.

Check rotation of blower, temperature rise of unit, and

 

 

 

minimum airflow. Adjust as needed.

Heat Will Not Turn Off.

 

Unit is in minimum heat on---time.

Check using ComfortLinkt Scrolling Marquee.

 

 

Occupancy schedule set point still calling for

Check using ComfortLinkt Scrolling Marquee.

 

 

Heating.

 

 

 

Unit running in Service Test mode.

Check using ComfortLinkt Scrolling Marquee.

 

 

Heater contactor failed.

Power off unit. Check contactor and replace if closed.

LEGEND

 

 

SAT - Supply Air Temperature

 

 

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Contents Table of Contents Safety Considerations What to do if you smell gasGeneral Basic Control UsageScrolling Marquee Mode and Menu Display Structure System Pilott and Touch Pilot DevicesCCN Tables and Display START-UP Power Supply Internal WiringEvaporator Fan Condenser Fans and MotorsControls Quick SET-UP Accessories CCN CommunicationSetting an Occupied Time Schedule Weekdays Only for 730 to Fan StatusFilter Status TimeclockService Test Programming Operating SchedulesIndependent Outputs Fan TestThird Party Control Controls OperationUnit Configuration ModesGeneral Operating Sequence Occupancy DeterminationCompressor Operation Indoor Fan OperationOutdoor Fan Operation Economizer OperationUnoccupied Free Cooling Indoor Air Quality IAQ Cooling Modes Cool Supply Air Set Point Ventilation Mode For all units with EconomizersFor units with Enthalpy Control Demand Control VentilationHeating Modes Supply-Air Temperature Sensor SAT Gas Heat Start-UpTemperature Compensated Start Setting Up the SystemTemp Comp Strt Cool Factr TCS.C Temp Comp Strt Heat Factr TCS.HCarrier Comfort Network Ccnr Configuration Demand LimitTroubleshooting Alarm HandlingRestart Procedure Complete Unit StoppageAlarms and Alerts Communication FailuresAlert Code T073 Outdoor Air Temperature Thermistor Failure Alert Code T074 Space Temperature Thermistor FailureAlert Code T075 Supply Air Temperature Thermistor Failure Alarm Code A154 Serial Eeprom Hardware FailureAlarm Code T155 Serial Eeprom Storage Failure Error Alarm Code A156 Critical Serial Eeprom Storage Fail ErrorAlarm Code A200 Linkage Timeout Comm Failure Alarm Code A404 Fire ShutdownAlert Code T415 IAQ Input Out of Range Alert Code T416 OAQ Input Out of RangeComfortLink Alarm Codes Cooling Troubleshooting Digital Scroll Controller DSC Troubleshooting Cooling Service AnalysisFlash Code 4 ⎯ Locked Rotor DSC Red LED Flash CodesEconomizer Troubleshooting Economizer Service AnalysisHeating Troubleshooting Variable Frequency Drive VFD TroubleshootingPhase Loss Protection IGC Service Analysis Logic IGC Board LED Alarm Codes Electric Heat Service AnalysisLED FlashThermistor Troubleshooting Air TemperaturesRefrigerant Temperatures Thermistor/Temperature Sensor CheckTransducer Troubleshooting Forcing Inputs and OutputsSensor Trim Temp Voltage Resistance Drop Temp Voltage Resistance Temp F Drop Degree C Degree F Major System Components GeneralPressure Voltage Psig48PD Control Wiring Schematic 50PD Control Wiring Schematic 48/50PD Power Wiring Schematic and Legend Typical Unit Component Arrangement Setting Main Base Board MBBMBB Connections FIL.SCenter of the board. Do not change this setting Economizer Control Board ECBECB Connections RM.OCModulation Board AUX1 CommunicationDigital Scroll Control Board DSC CMP.AVariable Frequency Drive VFD Variable Frequency Drive VFDIntegrated Gas Control IGC Board Integrated Gas Control IGC BoardLow Voltage Terminal Strip TB1Accessory Navigatort Display Field-Installed AccessoriesScrolling Marquee Display Carrier Comfort Network Ccnr InterfaceSpace Temperature Sensor T-58 Space Temperature Sensor AveragingSpace Temperature Sensor Averaging Service Cleaning Coil Maintenance and Cleaning RecommendationPeriodic Clean Water Rinse Routine Cleaning of Round-Tube Coil SurfacesCondensate Drain Pan FiltersOutdoor-Air Inlet Screens Main Burner 48PDEvaporator Fan Service and Replacement Evaporator Fan Performance AdjustmentLubrication Evaporator Fan Belt Tension Adjustment Variable Frequency Drive VFD ReplacementCondenser-Fan Adjustment Economizer Operation During Power Failure Verify Sensor PerformanceEvacuation Refrigerant ChargeGas Valve Adjustment PuronR RefrigerantAltitude Compensation 48PG03-07 Elevation Natural GAS PropaneHigh Altitude Main BurnersFilter Drier Protective DevicesReplacement Parts Diagnostic LEDsRelief Devices Compressor Sound ShieldMode RUN Status Appendix a Local Display and CCN TablesStrt Alrmdisp = CCNOnly Generic = CCNMode Service Test Mode TemperaturesMode Pressures Mode SET Points Mode InputsMode Outputs OutputsMode Configuration HT.TY HTRMRT.H MOT.HIA.CF IA.FNII.CF II.FNTrim SPT.CSPT.T SAT.CMode Time Clock CCN only TablesMode Operating Modes OK.HT ACT.HEN.LO AQ.DVMode Alarms Expansion Range Default CCN CCN Point CCN WriteExpansion Range Units TABLE/SUB---TABLE StatusAppendix B VFD Information VFD Terminal DesignationsVFD Configurations Standard Display Mode VFD OperationVFD Modes Start Up with AssistantParameters Mode Start-Up Assistant ModeChanged Parameters Mode Drive Parameter Backup ModeVFD Diagnostics VFD Maintenance Correcting AlarmsHistory Heat SinkFault Codes 101---105201---206 1000 10011002 1003Alarm Codes Maintenance IntervalsMaintenance Interval Main Fan Replacement Control Panel CleaningBattery Replacement Appendix C START-UP Data Fan Performance 48PDD05 Vertical UnitsFan Performance 48PDE05 Vertical Units AirflowFan Performance 48PDD06 Vertical Units Fan Performance 48PDE06 Vertical Units Rpm Bhp 1500Available External Static Pressure in. wg CFMFan Performance 48PDD05 Horizontal Units Fan Performance 48PDE05 Horizontal UnitsBhp Rpm Fan Performance 48PDD06 Horizontal Units 1026 1086 1144 1199 1253Fan Performance 48PDE06 Horizontal Units Fan Performance 50PD05 Vertical Units Fan Performance 50PD06 Vertical UnitsFan Performance 50PD05 Horizontal Units Bhp Rpm 1500General Notes for FAN Performance Data Tables Appendix D Additional START-UP Data Control SET Point and Configuration LOG Indicate Unit Settings belowCCN Point Entry 103 104 Unit START-UP Checklist PRE-START-UP106

48/50PD05 specifications

The Carrier 48/50PD05 is a remarkable addition to Carrier's lineup of rooftop units, offering advanced cooling and heating solutions for commercial applications. Designed for medium-sized buildings, this unit is well-suited for both new installations and as a replacement for older systems, thanks to its versatile features and efficient performance.

One of the standout features of the 48/50PD05 is its energy efficiency. It incorporates state-of-the-art technology to achieve high Seasonal Energy Efficiency Ratios (SEER) and EER ratings, reducing operational costs while delivering superior comfort. The unit is also compliant with the latest energy regulations, making it an environmentally friendly choice for building owners concerned about sustainability.

The 48/50PD05 is equipped with a highly efficient scroll compressor, which not only enhances performance but also contributes to quiet operation. This is a significant advantage in commercial spaces where noise levels need to be kept in check for comfort and productivity. Additionally, the unit includes advanced airflow design, ensuring even distribution of conditioned air throughout the space.

Technologically, the Carrier 48/50PD05 features Carrier's Infinity Control system, which allows for precise control of indoor climate. This intelligent control mechanism can be integrated with smart building management systems, enabling users to monitor and manage energy use effectively. Wi-Fi connectivity is also available, providing remote access for real-time adjustments and diagnostics.

Durability is another characteristic of the 48/50PD05. Constructed with high-quality materials, the unit withstands various environmental conditions, ensuring longevity and reliability. Moreover, the modular design facilitates easy maintenance, making service procedures efficient and cost-effective.

In addition to cooling, the Carrier 48/50PD05 offers heating capabilities, often utilizing gas or electric heating options that can be tailored to the specific needs of a building. The unit can also be equipped with integrated economizers, allowing for free cooling during suitable outdoor conditions, further enhancing energy savings.

Overall, the Carrier 48/50PD05 stands out as a high-performance HVAC solution that combines efficiency, technology, and durability. It provides building owners with a versatile tool to ensure comfort while minimizing their environmental footprint. With a strong emphasis on energy savings and advanced control features, this rooftop unit is a smart investment for any commercial property.
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