EasyManua.ls Logo

Carrier 50FC Series - User Manual

Carrier 50FC Series
144 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
1
Controls, Start-- Up, Operation
and Troubleshooting
48/50FC 04---07, 48/50GC 04---06
Single P ackage Rooft op Units
with SystemV u™ Controls Version 1.X
and Puronr (R---410A) Refr ig er ant
C150173
IMPORTANT: This literature covers 48/50FC 04--07 and 48/50GC 04--06 models with SystemVu controls version 1.X (factory--installed
option).
TABLE OF CONTENTS
Page
SAFETY CONSIDERATIONS 2.........................
GENERAL 3.........................................
Conventions Used in This Manual 3......................
BASIC CONTROL USAGE 3...........................
SystemVu Control (factory --installed option) 3..............
SystemVu Interface 3.................................
Accessory Navigatort Display 4........................
System Pilott andTouchPilott Devices 5................
CCN Tables and Display 5.............................
START -- UP 6.........................................
Unit Preparation 6....................................
Refrigerant Service Ports 6.............................
Crankcase Heater 6...................................
Compressor Rotation 6................................
Power Supply 6.....................................
Internal Wiring 6.....................................
Evaporator Fan 6....................................
Condenser Fans and Motors 6...........................
Return--Air Filters 8..................................
Outdoor--Air Inlet Screens 8............................
Accessory Installation 8...............................
Gas Heat (48FC and 48GC) 8...........................
CONTROLS QUICK SET-- UP 8.........................
Control Set Point and Confirmation Log 8.................
Initial Startup 8......................................
Thermostat Control 9.................................
Space T emperature Sensor Control -- Direct Wired
(T--55 or T--56 or T--59) 9.............................
Space Humidistat Control 9............................
Space Relative Humidity Sensor Control 9.................
CCN Communication 9...............................
CCN Linkage Control 9...............................

Table of Contents

Other manuals for Carrier 50FC Series

Preview: Service And Maintenance Instructions
Service And Maintenance Instructions112 pages
Preview: Installation, Operation And Maintenance Instructions
Installation, Operation And Maintenance Instructions64 pages
Preview: Control Manual
Control Manual98 pages

Questions and Answers

  • S
    stephanie51Nov 22, 2025
    Why is my Carrier Heat Pump showing erroneous readings of the input signals?
    • I
      ichristensenNov 23, 2025
      If your Carrier Heat Pump is showing erroneous readings of the input signals, check the following: 1. Ensure the correct power supply to the ?PC MEDIUM board and probes. 2. Verify the separation between the power supply of the digital inputs and that of the ?PC MEDIUM board; a 24 Vac/24 Vac, 5 VA transformer can be used. 3. Confirm that the cables from the probes are connected according to the instructions. 4. Make sure the probe cables are located far enough away from potential sources of magnetic interference, such as power cables, contactors, high voltage cables, or cables connected to units with high current peaks. 5. Check for high heat resistance between the probe and the sensor cap (if present); apply conductive paste or oil into the caps to ensure good temperature transfer if...
  • K
    Kristi ManningAug 25, 2025
    What to do if Carrier Heat Pump LCD shows strange characters or a blank display?
    • J
      Jennifer CampbellAug 26, 2025
      If you're experiencing general LCD problems (strange characters, blank display) when switching on your Carrier Heat Pump, check the following: 1. Ensure the software in the flash is correct. 2. Verify the pLAN address of the pCOc and on the terminal, ensuring they comply with the requirements of the current application. 3. Check the connection between the Graphic terminal and the ?PC MEDIUM board.
  • G
    gallagherrachelAug 27, 2025
    What to do if my Carrier 50FC completely stops?
    • O
      oburnsAug 27, 2025
      If your Carrier Air Conditioner stops completely, first, check the faults and alerts list to understand why it shut down. After identifying and fixing the issue, restart the unit. It's recommended to diagnose the unit in Service Test mode before running it normally and reset any faults before the control function can operate.
  • J
    Jill FrancisAug 27, 2025
    What does Fault F010 mean on my Carrier 50FC?
    • C
      Christine JacobsAug 27, 2025
      Fault F010 on your Carrier Air Conditioner indicates a low voltage issue, possibly due to a brownout, low supply voltage, or a missing phase in the supply power. The control system will shut down the unit, but it should automatically clear once the supply voltage rises above 19 volts AC.
  • W
    Wayne StevensonAug 28, 2025
    What does Fault F011 mean on my Carrier 50FC Air Conditioner?
    • J
      Jeffrey RiceAug 28, 2025
      Fault F011 indicates that the MBB reference voltage is out of range, usually due to an MBB failure or the supply voltage being out of range. The control system will shut down the unit. This fault should automatically clear when the DC reference voltage returns to its normal range.
  • T
    Trevor HardingSep 16, 2025
    What does Alert A105 mean on my Carrier 50FC Air Conditioner?
    • S
      Shannon BensonSep 16, 2025
      Alert A105 on your Carrier Air Conditioner indicates an open OAT sensor, generally caused by a faulty thermistor or an open thermistor due to a wiring error, or a loose connection. When this alert appears, the economizer will not operate for cooling.
  • D
    davidstewartSep 14, 2025
    What does Alert A103 mean on my Carrier 50FC?
    • J
      Jeanette RamirezSep 14, 2025
      Alert A103 on your Carrier Air Conditioner indicates a shorted FST sensor, typically caused by a faulty thermistor, a shorted thermistor due to a wiring error, or a loose connection. This alert resets automatically.
  • J
    Jennifer RichardSep 15, 2025
    What does Alert A104 mean on my Carrier Air Conditioner?
    • R
      robert58Sep 15, 2025
      Alert A104 on your Carrier Air Conditioner indicates that the OAT sensor is out of range. This is usually due to a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection. When this alert is active, the economizer will not operate to provide cooling.
  • J
    jennifer53Sep 6, 2025
    What does Fault F018 mean on my Carrier 50FC Air Conditioner?
    • A
      Amy SmithSep 6, 2025
      Fault F018 on your Carrier Air Conditioner indicates an MBB EEPROM failure, meaning the serial EEPROM chip on the MBB, which stores the unit’s configuration, is not responding. Recovery is automatic, but you might need to replace the MBB board. Before replacing the board, try cycling the power to the control.
  • S
    Stephanie HillSep 4, 2025
    What does Alert A016 mean on my Carrier 50FC Air Conditioner?
    • S
      Stephen SmithSep 4, 2025
      Alert A016 on your Carrier Air Conditioner indicates that the MBB 24VDC voltage is out of range, usually due to an MBB failure or the supply voltage being out of range. When this alert is active, Analog Input numbers 6, 7, and 8 will be in error. The alert should automatically clear when the voltage rises above 19 volts DC.

Summary

Controls, Start-Up, Operation and Troubleshooting

SAFETY CONSIDERATIONS

Essential safety precautions for installation and servicing of the equipment.

BASIC CONTROL USAGE

Explains the SystemVu control system and its interface for unit management.

SystemVu Interface Operation

Accessory Navigator Display

START-UP

Unit Preparation

Compressor Rotation

Evaporator Fan

CONTROLS QUICK SET-UP

Control Set Point and Configuration Log

Initial Startup

Details the process for completing the initial startup prompt on the SystemVu controller.

Quick Setup

Network Setup

System Auto Test

Space Temperature Sensor Control - Direct Wired (T-55 or T-56 or T-59)

CCN Communication

Steps for configuring CCN communication settings.

CCN Linkage Control

System Pilot - Communication Space Sensor

Economizer

Configuration steps for a field-installed economizer.

Power Exhaust

Electric Heat

SERVICE TEST

Independent Outputs

Fan Test

Cooling Test

Automatic Test

Describes the AUTOMATIC TEST submenu for executing system tests.

CONTROLS OPERATION

Unit Configuration

Describes configurations for factory options and accessories.

Configurable Switches and Analog sensors

General Operation

Demand Determination

Thermostat Demand

Space Sensor Demand

Setpoint Determination

Temperature Demand

Humidity Demand

Occupancy Determination

Indoor Fan Operation

Maximum Speed (MAXIMUM IDF SPEED)

Ventilation Indoor Fan Speed (VENT IDF SPEED)

Heating Operation

Heating Mode Control

Describes the three sub-modes of heating operation.

Supply Air Tempering

Two Position Damper Operation

Economizer Operation

Minimum Ventilation

Cooling Operation

Cooling Mode Control

Explains the nine operating sub-modes within the cooling HVAC mode.

Cooling Staging Control

Traditional Thermostat Control

Staging request based directly on thermostat inputs.

Compressor Control

Outdoor Fan Control

Low Ambient Operation

Operation with head pressure device when OAT is low.

Humidi-MiZerR Operation

Operation with head pressure device and reheat active.

Optional Humidi-MiZer Dehumidification System

Dehumidification Demand

How dehumidification demand is seen via switch input or sensor.

Humidi-MiZerR System Modes

Normal Cooling

Dehum;Mech Cooling (Subcooling) Mode

Increases latent heat removal and decreases sensible cooling.

Dehumidification (Hot Gas Reheat) Mode

Provides maximum latent cooling with minimal sensible capacity.

Reheat Control

Indoor Fan Based Dehumidification

Supply-Air Temperature Sensor (SAT) Heat Mode

Heating Staging Control

Adaptive Control

Stage timers and supply air trend determining stage requests.

Indoor Air Quality (IAQ)

ANALOG IAQ CTRL = 1 (DCV)

Free Cooling

Dry Bulb Lockout

Enthalpy Lockout

Unoccupied Free Cooling Lockout

Unoccupied Free Cooling

Algorithm to maintain space temperature halfway between occupied set points using economizer.

Power Exhaust

Pre-occupancy Purge

Temperature Compensated Start

Linkage

Carrier Comfort NetworkR (CCN) Operation

BACnet Network Operation

Alarm Handling

Complete Unit Stoppage

Restart Procedure

Faults and Alerts

Information on viewing and clearing unit alarms.

Alarm Relay Output

Fault F011 - MBB REFERENCE VOLTAGE

Fault F018 - MBB EEPROM FAILURE

Alert A019 - MBB CLOCK FAILURE

Fault F020 - SOFTWARE ERROR

Alert A100 - SAT SENSOR FAILURE

Alert A104 - OAT SENSOR RANGE

Alert A107 - RAT SENSOR RANGE

Alert A110 - SPT SENSOR RANGE

Alert A130 - CIR.A SSP SENSOR RANGE

Alert A133 - CIR.A SDP SENSOR RANGE

Alert A160 - OARH OPEN SENSOR

Alert A162 - RARH OPEN SENSOR

Alert A164 - IAQ OPEN SENSOR

Alert A166 - OAQ OPEN SENSOR

Alert A168 - SPACE RELATIVE HUMIDITY OPEN SENSOR

Alert A170 - ECON FEEDBACK RANGE

Alert A190 - TSTAT HEAT;COOL CALLS

Fault F200 - FIRE SHUTDOWN

Fault F201 - CONDENSATE OVERFLOW

Fault F318 - COMPRESSOR STUCK ON

Fault F319 - C.A1 DOWN DUE TO FAIL

Alert A320 - C.A1 REVERSE ROTATION

Alert A321 - C.A1 FAIL TO PRESSURE

Alert A410 - IGC IGNITION FAILURE

Fault F411 - ROLLOUT WITHOUT HEAT

Fault F412 - RUN AWAY HEAT

Alert A510 - INDOOR FAN STATUS

Fault F511 - IDF OFF WHEN COMMAND ON

Fault F512 - IDF ON WHEN COMMAND OFF

Alert A700 - ECON NOT MODULATING

Control Module Communication

Communication Failures

Cooling Troubleshooting

Humidi-MiZerR System Troubleshooting

Economizer Troubleshooting

Heating Troubleshooting

Gas Heat (48 FC and 48 GC Units)

Refers to Table 17 for general gas heating service analysis.

Electric Heat (50 FC and 50 GC Units)

Refers to Table 19 for electric heating service analysis.

Phase Protection

Phase Reversal Protection

Phase Loss Protection

Thermistor Troubleshooting

Thermistor;Temperature Sensor Check

Transducer Troubleshooting

MAJOR SYSTEM COMPONENTS

General

Main Base Board (MBB)

Integrated Gas Control (IGC) Board

Protective Devices

Compressor Protection

Details overcurrent and overtemperature protection for compressors.

Evaporator Fan Motor Protection

Protection for ECM motor against locked rotor and over-current.

Condenser Fan Motor Protection

Saturated Suction Pressure (SSP)

Monitors SSP for potential circuit shutdown and automatic reset.

Condensate Overflow Switch (COFS)

Detects full drain pan and controls relay switch.

Space Mounted Sensors

Space Temperature Sensor (T-55)

Details the T-55 sensor, its installation, and override button.

Space Temperature Sensor (T-56)

Details the T-56 sensor, its remote set point adjustment, and override button.

Carrier Comfort NetworkR (CCN) Interface

To connect the unit to the network:

APPENDIX A: SystemVut Controller Display

Run Status Main Menu Layout

Details the layout of the Run Status main menu items.

Run Status Main Menu Layout (cont)

Continues the layout of the Run Status main menu items.

Settings Main Menu Layout

Details the layout of the Settings main menu items.

Settings Main Menu Layout (cont)

Continues the layout of the Settings main menu items.

Alerts;Faults Main Menu Layout

Details the layout of the Alerts/Faults main menu.

Service Main Menu Layout

Details the layout of the Service main menu.

Service Main Menu Layout (cont)

Continues the layout of the Service main menu.

Inputs Main Menu Layout

Details the layout of the Inputs main menu.

Inputs Main Menu Layout (cont)

Continues the layout of the Inputs main menu.

Outputs Main Menu Layout

Details the layout of the Outputs main menu.

APPENDIX B: SystemVu Controller Display

MODE - RUN STATUS

Lists items related to operating modes and run status.

MODE - SUB-MODE

Lists items related to operating sub-modes.

MODE - VENT

MODE - DEMAND

MODE - ALARMS

Lists items related to current alarms and alarm history.

APPENDIX C: Navigatort Display

MODE - RUN STATUS

MODE - RUN STATUS (cont)

MODE - SERVICE TEST

Lists Navigator display items for service tests.

MODE - TEMPERATURES

MODE - INPUTS

MODE - OUTPUTS

MODE - CONFIGURATIONS

MODE - CONFIGURATIONS (cont)

MODE - TIME CLOCK

MODE - TIME CLOCK (cont)

MODE - OPERATING MODES

MODE - PRESSURES

MODE - ALARMS

Lists Navigator display items for alarms.

MODE - SETPOINTS

APPENDIX D: SystemVut Controller CCN Tables

Service Config Tables

Lists SystemVu controller service configuration tables.

Service Config Tables (cont)

Continues SystemVu controller service configuration tables.

Status Display Tables

Status Display Tables (cont)

Maintenance Tables

Maintenance Tables (cont)

Configuration Tables

Configuration Tables (cont)

Setpoint Table

APPENDIX E: BACnet Points List

Analog Value (AV) Points

Analog Value (AV) Points (cont)

Binary Value (BV) Points

Binary Value (BV) Points (cont)

Multi-State Value (MSV) Points

String Value (SV) Points

UNIT START-UP CHECKLIST

I. PRE-START-UP:

Pre-start-up checks including packaging removal, installation verification, and connections.

II. START-UP

Start-up procedures focusing on electrical connections and measurements.

III. HUMIDI-MIZERR SYSTEM START-UP

STEPS

OBSERVE AND RECORD

Carrier 50FC Series Specifications

General IconGeneral
BrandCarrier
Model50FC Series
CategoryAir Conditioner
LanguageEnglish

Related product manuals