Carrier Elite air conditioner error codes

The Carrier brand was created in 1915 by Willis Carrier, the American engineer, who invented the modern air conditioning. Back then the name of the company was Toyo Carrier. Although the company’s country of origin is Japan, today it is headquartered in Farmington, Connecticut. Carrier is a part of the United Technologies Corporation, which acquired this brand in 1979. Air conditioning systems have always been its main focus, as well as commercial refrigeration systems.
If your Carrier Elite air conditioner displays an error code, then this page is exactly what you need: you will find out the explanation of all the fault codes.

Carrier Elite 025N-1, 035N-1, 045N-1, 055N-1, 065N-1, 075N-1 Series

Indoor Unit Error Display

DisplayLED STATUS
E0EEPROM parameter error
E1Indoor unit and outdoor unit communication protection
E2Zero-crossing signal error
E3Indoor fan speed has been out of control
E5Open or short circuit of outdoor temperature sensor or outdoor unit
EEPROM parameter error
E6Open or short circuit of room or evaporator coil temperature sensor
E7Outdoor fan speed has been out of control
P0IBM malfunction or IGBT over-strong current protection
P1Over voltage or too low voltage protection
P2Temperature protection of compressor top.
P4Inverter compressor drive error

Carrier MOTORMASTER 4850P3 air conditioner error codes

CODEDESCRIPTIONPROBABLE CAUSECORRECTIVE ACTION
AFHigh Temperature FaultAmbient temperature is too high; Cooling fan has failed (if equipped).Check cooling fan operation.
CFControl FaultA blank EPM, or an EPM with corrupted data has been installed.Perform a factory reset using Parameter 48 program section.
cFIncompatibility FaultAn EPM with an incompatible parameter version has been installed.Either remove the EPM or perform a factory reset (Parameter 48) to change the parameter version of the EPM to match the parameter version of the drive.
F1EPM FaultThe EPM is missing or damaged.Install EPM or replace with new EPM.
F2—F9 FoInternal FaultsThe control board has sensed a problemConsult factory.
GFData FaultUser data and Carrier defaults in the EPM are corrupted.Restore factory defaults by toggling P48 to another mode. Then set P48 to desired mode to restore all defaults for that mode. If that does not work, replace EPM.
HFHigh DC Bus Voltage FaultLine voltage is too high; Deceleration rate is too fast; Overhauling load.Check line voltage — set P01 appropriately.
JFSerial FaultThe watchdog timer has timed out, indicating that the serial link has been lost.Check serial connection (computer). Check settings for P15.
Check settings in communication software to match P15.
LFLow DC Bus Voltage FaultLine voltage is too low.Check line voltage — set P01 appropriately.
OFOutput Transistor FaultPhase to phase or phase to ground short circuit on the output; Failed output transistor; Boost settings are too high; Acceleration rate is too fast.Reduce boost or increase acceleration values. If unsuccessful, replace drive.
PFCurrent Overload FaultVFD is undersized for the application; Mechanical problem with the driven equipment.Check line voltage set P01 appropriately.
Check for dirty coils.
Check for motor bearing failure.
SFSingle-phase FaultSingle-phase input power has been applied to a three-phase drive.Check input power phasing.
Drive displays “—“ even though drive should be runningStart Contact is Not ClosedStart contact is missing or not functioning.Check fan relay.
VFD flashes “---” and LCSStart Contact is Not ClosedStart contact not closed.Check FR for closed contact.
VFD flashes 57 (or 47) and LCSSpeed Signal LostSpeed signal lost. Drive will operate at 57 (or 47) Hz until reset or loss of start command. Resetting requires cycling start command (or power).Transducer signal lost. Check VDC signal between TB5 and TB2. Should be in range of 0.5V to 4.5V. 5VDC output should be present between TB6 and TB2.

Carrier GEMINI 38APD025-100 air conditioner error codes

ALARM/ ALERT CODEDESCRIPTIONWHY WAS THIS ALARM GENERATED?
T048Circuit A Compressor Availability AlertTwo compressors on circuit failed
T049Circuit B Compressor Availability Alert
T051.T052, T053Circuit A Compressor A1 .A2.A3 FailureRespective current sensor board (CSB) feedback signal does not match relay state
TOSS, T056, T057Circuit B Compressor B1 .B2.B3 Failure
A051, A052, A053Circuit A Compressor A1 .A2.A3 FailureRespective current sensor board (CSB) feedback signal is ON when the compressor should be off
A055, A056, A057Circuit B Compressor B1 .B2.B3 Failure
A060Supply Air Thermistor FailureThermistor outside range of -40 to 245 F (-40 to 118 C)
A060Supply Air Temperature Update not receivedTemperature not updated during 3 minutes
A061Return Air Thermistor FailureThermistor outside range of -40 to 245 F (-40 to 118 C)
A061Return Air Temperature Update not receivedTemperature not updated during 3 minutes
T068Circuit A Return Gas Thermistor FailureThermistor is outside range of -40 to 245 F (-40 to 118 C)
T069Circuit B Return Gas Thermistor Failure
T073Outside Air Thermistor Failure
T074Space Temperature Thermistor Failure
T090Circuit A Discharge Pres- sure Transducer FailureThe pressure is outside the range of 0.0 to 667.0 psig
T091Circuit B Discharge Pres- sure Transducer Failure
T092Circuit A Suction Pressure Transducer FailureThe pressure is outside the range of 0.0 to 420.0 psig
T093Circuit B Suction Pressure Transducer Failure
T094Discharge Gas Thermistor FailureDischarge thermistor (DTT) is either open or shorted
T110Circuit A Loss of ChargeIf the compressors are off and discharge pressure reading is less than 26 psig for 30 sec.
T111Circuit B Loss of Charge
T112Circuit A High Saturated Suction TemperatureCircuit is on and saturated suction temperature is greater than 70 F (15.6 C) for 5 minutes
T113Circuit B High Saturated Suction Temperature
T114Circuit A Low Suction SuperheatSuction superheat is less than 5 F (2.8 C) for 5 minutes.
T115Circuit B Low Suction Superheat
T118High Discharge Gas TemperatureDischarge Thermistor (DTT) reading is greater than 250 F
A118High Discharge Gas Temperature3 Discharge Gas Temperature alarms occur within a day
P120Circuit A Low Saturated SuctionSSTA is less than 20 F for 4 minutes, less than 10 F for 2 minutes, less than 0° F for 1 minute or less than -20 F for 20 seconds continuously
T120Circuit A Low Saturated Suction
A120SSTA is less than 20 F for 4 minutes, less than 10 F for 2 minutes, less than 0° F for 1 minute or less than -20 F for 20 seconds continuously and only one compressor running
P121Circuit A Low Saturated Suction
T121Circuit B Low Saturated Suction
A121
T122High Pressure Switch Trip Circuit AHigh Pressure A Switch Input open to MBB
T123High Pressure Switch Trip Circuit B
T126Circuit A High Discharge PressureSCTA >150 F
A126
T127Circuit B High Discharge Pressure
A127
A140Reverse Rotation DetectedIncoming unit power leads not phased correctly
A150Emergency StopCCN emergency stop command received
A151Illegal ConfigurationOne or more illegal configurations exists.
T153Real Time Clock Hardware FailureInternal clock on MBB fails
A154Serial EEPROM Hardware FailureHardware failure with MBB
T155Serial EEPROM Storage FailureConfiguration/storage failure with MBB
A156Critical Serial EEPROM Storage Failure
A157A/D Hardware FailureHardware failure with peripheral device
A170Loss of Communication with CXBMBB loses communication with CXB
A173Loss of Communication with EMMMBB loses communication with EMM
T1744 to 20 mA Cooling Set Point/Desired % Capacity Input FailureIf configured with EMM and input less than 2 mA or greater than 22 mA
T1764 to 20 mA Temperature Reset Input Failure
T1774 to 20 mA Demand Limit Input Failure
A200Fan Status Switch 1 OpenAlarm is generated when fan status switch 1 is open when the unit is in an ON state
T201Fan Status Switch 1 is open with Dual TSTAT configurationAlert is generated when fan status switch 1 is open when Y1 or Y2 are closed
T202Fan Status Switch 2 is open with Dual TSTAT configuration
T303Condenser Coil Maintenance DueCoil Service Countdown (C.L.DN) expired. Complete condenser coil cleaning and enter 'YES’ for Coil Maintenance Done (C.L.MN) item.
T500Current Sensor Board A1 FailureAlert occurs when CSB output is a constant high value
T501Current Sensor Board A2 Failure
T502Current Sensor Board A3 Failure
T503Current Sensor Board B1 Failure
T504Current Sensor Board B2 Failure
T505Current Sensor Board B3 Failure

Carrier split air conditioner error codes

Carrier Error CodeCarrier Error Code Definition
13Unit A indoor pipe outlet temperature sensor malfunction
14
15Unit A Indoor return air sensor malfunction
16Unit A mode conflict
17Unit A freeze protection
23Unit B indoor pipe outlet temperature sensor malfunction
24Unit B indoor pipe inlet temperature sensor malfunction
25Unit B Indoor return air sensor malfunction
26Unit B mode conflict
27Unit B freeze protection
33Unit C indoor unit pipe outlet temperature sensor malfunction
34Unit C indoor unit pipe inlet temperature sensor malfunction
35Unit C Indoor unit return air sensor malfunction
36Unit C mode conflict
37Unit C freeze protection
41Unit D communication error
42Indoor return air temperature sensor malfunction
43Unit D indoor pipe outlet temperature sensor malfunction
44Unit D indoor pipe inlet temperature sensor malfunction
45Unit D Indoor return air temperature sensor malfunction
46Unit D mode conflict
47Unit D freeze protection
51Unit E communication error
52Unit E indoor pipe midway temperature sensor malfunction
53Unit E indoor pipe outlet temperature sensor malfunction
54Unit E indoor pipe inlet temperature sensor malfunction
55Unit E Indoor return air temperature sensor malfunction
56Unit E mode conflict
57Unit E freeze protection
C5Jumper missing on replacement indoor board