Carrier 48/50PD05 manual Cooling Troubleshooting

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48/50PD

Table 8 — ComfortLinkAlarm Codes (cont)

 

 

 

 

 

 

ALARM

 

 

 

 

 

OR

 

DESCRIPTION

ACTION TAKEN BY

RESET

PROBABLE CAUSE

ALERT

 

CONTROL

METHOD

 

 

 

NUMBER

 

 

 

 

T178

 

Loss of Communication with the Capacity

Unit shutdown ---HVAC

Automatic

Communication wiring problem with AUX1 or faulty

 

Control Board

disable

MBB, ECB, or AUX1

 

 

 

 

T179

 

Loss of communication with the Economizer

No economizer

Automatic

Communication wiring problem with ECB or faulty

 

Control Board

operation

MBB, ECB, or AUX1

 

 

 

 

T180

 

Loss of communication with the Economizer

No economizer

Automatic

Communication wiring problem with actuator.

 

Actuator

operation

 

 

 

 

 

A200

 

Linkage Timeout Error --- Comm Failure

No Linkage Operation

Automatic

Received a table write from Linkage before, now not

 

fall back to local SPT

receiving any linked commands

 

 

 

 

 

A404

 

Fire Shutdown

Unit Shutdown

Automatic

Smoke detected by smoke detector

T408

 

Dirty Filter

Alert Generated

Automatic

Dirty Filter

 

 

 

 

 

If IDF.F =

 

 

 

 

 

If IDF.F = Yes, then Unit

YES, then

 

 

 

 

Fan Status Switch ON, Fan Contactor OFF

Manual,

Bad Fan Status Switch. Configuration incorrect.

 

 

 

Shutdown

 

 

 

 

otherwise

 

 

 

 

 

 

 

T409

 

 

 

automatic

 

 

 

 

If IDF.F =

 

 

 

 

 

 

 

 

 

 

 

If IDF.F = Yes, then Unit

YES, then

Tripped Circuit Breaker. Broken belt. Bad indoor fan

 

 

 

Fan Status Switch OFF, Fan Contactor ON

Manual,

 

 

 

Shutdown

motor. Configuration incorrect. Bad fan status switch.

 

 

 

 

otherwise

 

 

 

 

 

 

 

 

 

 

 

automatic

 

 

 

 

Economizer Damper Actuator Out of

Alert Generated

Automatic

Calibrate economizer (E.CAL). If problem still exist

 

 

 

Calibration

then determine what is limiting economizer rotation.

 

 

 

 

 

 

 

 

Economizer Damper Actuator Torque Above

Alert Generated

Automatic

Actuator load too high. Check damper load.

 

 

 

Load Limit

 

 

 

 

 

 

 

 

 

Economizer Damper Actuator Hunting

Alert Generated

Automatic

Damper position changing too quickly.

T414

 

Excessively

 

 

 

 

 

Economizer Damper Stuck or Jammed

Alert Generated

Automatic

No economizer motion. Check damper blades, gears,

 

 

 

 

 

 

and actuator.

 

 

 

 

 

 

 

 

 

Economizer Damper Actuator Mechanical

Alert Generated

Automatic

Check actuator and replace if necessary.

 

 

 

Failure

 

 

 

 

 

 

 

 

 

Economizer Damper Actuator Direction

Alert Generated

Automatic

Actuator direction control switch (CCW, CW) wrong.

 

 

 

Switch Wrong

 

 

 

 

 

 

T415

 

IAQ Input Out of Range

No IAQ Operations

Automatic

Bad sensor, bad wiring, or sensor configured

 

incorrectly.

 

 

 

 

 

 

T416

 

OAQ Input Out of Range

No OAQ Operations

Automatic

Bad sensor, bad wiring, or sensor configured

 

incorrectly.

 

 

 

 

 

 

LEGEND

 

 

 

 

 

ECB

-

Economizer Control Board

 

 

 

IGC

-

Integrated Gas Controller

 

 

 

MBB -

Main Base Board

 

 

 

OAT

-

Outdoor-Air Thermistor

 

 

 

Cooling Troubleshooting

Use the Scrolling Marquee display or a CCN device to view the cooling status display and the cooling diagnostic display (see Appendix A) for information on the cooling operation. Check the current alarms and alarm history for any cooling alarm codes and correct any causes. (See Table 9.)

Verify any unique control configurations per installed site requirements or accessories. If alarms conditions are corrected and cleared, operation of the compressors and fans may be verified by using the Service Test mode. (See Table 5.) See Table 9 for general cooling service analysis.

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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 Evaporator Fan Power SupplyInternal Wiring Condenser Fans and MotorsControls Quick SET-UP Accessories CCN CommunicationFilter Status Setting an Occupied Time Schedule Weekdays Only for 730 toFan Status TimeclockIndependent Outputs Service TestProgramming Operating Schedules 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 For units with Enthalpy Control Ventilation ModeFor all units with Economizers Demand Control VentilationHeating Modes Supply-Air Temperature Sensor SAT Gas Heat Start-UpTemp Comp Strt Cool Factr TCS.C Temperature Compensated StartSetting Up the System Temp Comp Strt Heat Factr TCS.HCarrier Comfort Network Ccnr Configuration Demand LimitRestart Procedure TroubleshootingAlarm Handling Complete Unit StoppageAlarms and Alerts Communication FailuresAlert Code T075 Supply Air Temperature Thermistor Failure Alert Code T073 Outdoor Air Temperature Thermistor FailureAlert Code T074 Space Temperature Thermistor Failure Alarm Code A154 Serial Eeprom Hardware FailureAlarm Code A200 Linkage Timeout Comm Failure Alarm Code T155 Serial Eeprom Storage Failure ErrorAlarm Code A156 Critical Serial Eeprom Storage Fail Error 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 LED IGC Board LED Alarm CodesElectric Heat Service Analysis FlashRefrigerant Temperatures Thermistor TroubleshootingAir 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 Pressure Voltage Major System ComponentsGeneral 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 TB1Scrolling Marquee Display Accessory Navigatort DisplayField-Installed Accessories Carrier Comfort Network Ccnr InterfaceSpace Temperature Sensor T-58 Space Temperature Sensor AveragingSpace Temperature Sensor Averaging Service Periodic Clean Water Rinse CleaningCoil Maintenance and Cleaning Recommendation Routine Cleaning of Round-Tube Coil SurfacesOutdoor-Air Inlet Screens Condensate Drain PanFilters Main Burner 48PDEvaporator Fan Service and Replacement Evaporator Fan Performance AdjustmentLubrication Evaporator Fan Belt Tension Adjustment Variable Frequency Drive VFD ReplacementCondenser-Fan Adjustment Evacuation Economizer Operation During Power FailureVerify Sensor Performance Refrigerant ChargeAltitude Compensation 48PG03-07 Gas Valve AdjustmentPuronR Refrigerant Elevation Natural GAS PropaneFilter Drier High AltitudeMain Burners Protective DevicesRelief Devices Replacement PartsDiagnostic LEDs Compressor Sound ShieldMode RUN Status Appendix a Local Display and CCN TablesOnly StrtAlrmdisp = CCN Generic = CCNMode Service Test Mode TemperaturesMode Pressures Mode SET Points Mode InputsMode Outputs OutputsMode Configuration MRT.H HT.TYHTR MOT.HII.CF IA.CFIA.FN II.FNSPT.T TrimSPT.C SAT.CMode Time Clock CCN only TablesMode Operating Modes EN.LO OK.HTACT.H AQ.DVExpansion Range Units Mode AlarmsExpansion Range Default CCN CCN Point CCN Write TABLE/SUB---TABLE StatusAppendix B VFD Information VFD Terminal DesignationsVFD Configurations VFD Modes Standard Display ModeVFD Operation Start Up with AssistantChanged Parameters Mode Parameters ModeStart-Up Assistant Mode Drive Parameter Backup ModeVFD Diagnostics History VFD MaintenanceCorrecting Alarms Heat SinkFault Codes 101---105201---206 1002 10001001 1003Alarm Codes Maintenance IntervalsMaintenance Interval Main Fan Replacement Control Panel CleaningBattery Replacement Fan Performance 48PDE05 Vertical Units Appendix C START-UP DataFan Performance 48PDD05 Vertical Units AirflowFan Performance 48PDD06 Vertical Units Available External Static Pressure in. wg Fan Performance 48PDE06 Vertical UnitsRpm Bhp 1500 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.