Carrier 48FC 06 - User Manual

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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...............................

Main Page

Questions and Answers

J
jmartinezSep 6, 2025
What does Fault F020 mean on my Carrier Air Conditioner?
- K
  kweeksSep 7, 2025
  Fault F020 on your Carrier Air Conditioner indicates a software error, meaning the software on the MBB is not responding. Recovery is automatic if the software can reset the board. If not, try cycling the power to the control before considering board replacement.
H
hebertdavidAug 22, 2025
What to do if my Carrier 48FC 06 completely stops?
- P
  Pamela DeanAug 22, 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
Jay TurnerSep 4, 2025
What does Fault F018 mean on my Carrier 48FC 06 Air Conditioner?
- B
  Brandi RyanSep 4, 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.
C
Christina HillSep 2, 2025
What does Alert A017 mean on my Carrier 48FC 06?
- J
  Jenna HarrisSep 2, 2025
  Alert A017 on your Carrier Air Conditioner indicates that the MBB 5VDC voltage is out of range, typically caused by an MBB failure or the supply voltage being out of range. When this alert is active, transducer inputs will be in error. The alert should automatically clear when the voltage rises above 4.5 volts DC.
E
erindavisSep 1, 2025
What does Alert A016 mean on my Carrier 48FC 06 Air Conditioner?
- L
  lisa90Sep 1, 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.
D
Dr. Morgan SmithAug 30, 2025
What does Alert A015 mean on my Carrier Air Conditioner?
- M
  Melissa FergusonAug 30, 2025
  Alert A015 on your Carrier Air Conditioner indicates that the MBB RNET voltage is out of range, generally due to an MBB failure or the supply voltage being out of range. The alert should automatically clear when the voltage returns to its normal range.
A
Adam RodriguezAug 29, 2025
What does Fault F014 mean on my Carrier 48FC 06 Air Conditioner?
- J
  jenniferortizAug 29, 2025
  Fault F014 on your Carrier Air Conditioner means that MBB Fuse 3 is open. This is usually caused by a wiring error in a switch input or the switch drawing too much current. The control system will shut down the unit, and the fault should clear automatically once the fuse temperature is back in the normal range.
A
Adam EvansAug 27, 2025
What does Fault F013 mean on my Carrier 48FC 06?
- L
  lisafisherAug 28, 2025
  Fault F013 on your Carrier Air Conditioner indicates that MBB Fuse 2 is open, typically due to a wiring error in a switch input or the switch pulling too much current. The control will shut down the unit, but the fault should automatically clear when the fuse temperature returns to normal.
B
Billy WilliamsAug 26, 2025
What does Alert A012 mean on my Carrier Air Conditioner?
- L
  Linda MillsAug 27, 2025
  Alert A012 on your Carrier Air Conditioner signals an MBB zero crossing issue, often caused by an MBB failure or the supply voltage frequency being too high or too low. The alert should automatically clear once the supply voltage returns to the normal range.
S
Stephanie WhiteAug 25, 2025
What does Fault F011 mean on my Carrier 48FC 06 Air Conditioner?
- H
  heather63Aug 25, 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.