Machine Fault Guide

Directory

Transport Refrigeration

Transport Refrigeration fault-code records grouped by brand and product, with source links and safe-use boundaries.

This category currently contains 279 published or scheduled source-linked records across 2 brands. Use the category to narrow the equipment type, then confirm the brand, product family, exact model and controller on the detail record.

Brand coverage

BrandRecords
Thermo King276
Carrier Transicold3

Product scope represented

  • Truck Refrigeration Unit
  • Truck/Trailer Refrigeration Unit

Before using a code meaning

  • A matching number is not enough when a different brand or controller uses the same characters.
  • Read the public source and check that it covers the machine label.
  • Follow only owner-safe actions supported by the exact manual.
  • Escalate repeated alarms, uncertain operating status and hazardous-system work.

Read the source policy and safety framework for the site-wide rules.

Carrier Transicold A01: Low pressure switch open 0 published records Carrier Transicold A02: High pressure switch open 0 published records Carrier Transicold A03: Standby compressor overheated 0 published records Thermo King Alarm - C -: Communications Failure, Microprocessor to In-Cab Control Box 0 published records Thermo King Alarm 02: Check Evaporator Coil Sensor (Zone) 0 published records Thermo King Alarm 03: Check (Control); Return Air Sensor (Zone) 0 published records Thermo King Alarm 04: Check (Control); Discharge Air Sensor (Zone) 0 published records Thermo King Alarm 05: Check Ambient Temp Sensor 0 published records Thermo King Alarm 06: Check Coolant Temp Sensor 0 published records Thermo King Alarm 07: Check Engine RPM Sensor 0 published records Thermo King Alarm 08: Unit Running on Coil Sensor (Zone) 0 published records Thermo King Alarm 09: High Evaporator Temperature (Zone) 0 published records Thermo King Alarm 10: High Discharge Pressure (or Temperature) 0 published records Thermo King Alarm 100: Heater Fan Failure (CR) 0 published records Thermo King Alarm 101: Controlling on Evap Coil Outlet Temp (CR) 0 published records Thermo King Alarm 102: Low Evaporator Coil Temperature (CR) 0 published records Thermo King Alarm 103: Low Heater Fuel Level (CR) 0 published records Thermo King Alarm 104: Check Remote Fan Speed (Zone) 0 published records Thermo King Alarm 105: Check Receiver Tank Press Sol Circuit 0 published records Thermo King Alarm 106: Check Purge Valve Circuit 0 published records Thermo King Alarm 107: Check Condenser Inlet Sol Circuit 0 published records Thermo King Alarm 108: Door Open Timeout (Zone) 0 published records Thermo King Alarm 11: Unit or Zone Controlling on Alternate Sensor (Zone) 0 published records Thermo King Alarm 110: Check Suction Line Sol Circuit (Zone) 0 published records Thermo King Alarm 111: Unit Not Configured Correctly (Zone) 0 published records Thermo King Alarm 112: Check Remote Fans (Zone) 0 published records Thermo King Alarm 113: Check Electric Heat Circuit (Zone) 0 published records Thermo King Alarm 114: Multiple Alarms - Can Not Run (Zone) 0 published records Thermo King Alarm 115: Check High Pressure Cut Out Switch 0 published records Thermo King Alarm 116: Check High Pressure Cut In Switch 0 published records Thermo King Alarm 117: Auto Switch from Diesel to Electric 0 published records Thermo King Alarm 118: Auto Switch from Electric to Diesel 0 published records Thermo King Alarm 12: Sensor or Digital Input Shutdown (Zone) 0 published records Thermo King Alarm 120: Check Alternator Excite Circuit 0 published records Thermo King Alarm 121: Check PMW Liquid Injection Circuit 0 published records Thermo King Alarm 122: Check Diesel/Electric Circuit 0 published records Thermo King Alarm 123: Check Evap Coil Inlet Temp Sensor (CR) 0 published records Thermo King Alarm 124: Check Evap Coil Outlet Temp Sensor (CR) 0 published records Thermo King Alarm 125: Check Tank Level Sensor (CR) 0 published records Thermo King Alarm 126: Check Back Pressure Regulator (CR) 0 published records Thermo King Alarm 127: Setpoint Not Entered (Zone) 0 published records Thermo King Alarm 128: Engine Run Time Maint Reminder #1/Service Due 0 published records Thermo King Alarm 129: Engine Run Time Maint Reminder #2 0 published records Thermo King Alarm 13: Sensor Check (Zone) 0 published records Thermo King Alarm 130: Engine Run Time Maint Reminder #1 0 published records Thermo King Alarm 131: Electric Run Time Maint Reminder #2 0 published records Thermo King Alarm 132: Total Unit Run Time Maint Reminder #1 0 published records Thermo King Alarm 133: Total Unit Run Time Maint Reminder #2 0 published records Thermo King Alarm 134: Controller Power On Hours 0 published records Thermo King Alarm 135: Check Spare Digital Inputs 0 published records Thermo King Alarm 137: Check Spare Digital Outputs 0 published records Thermo King Alarm 138: Log DAS Real Time Clock Battery Failure (DAS) 0 published records Thermo King Alarm 139: Abort Evacuation Mode 0 published records Thermo King Alarm 14: Defrost Terminated by Time 0 published records Thermo King Alarm 141: Auto Switch Diesel to Electric Disabled 0 published records Thermo King Alarm 142: Check Thermax Valve 0 published records Thermo King Alarm 143: Check Remote Drain Hose Heater Output (Zone) 0 published records Thermo King Alarm 144: Lost CAN Communications to Expansion Module 0 published records Thermo King Alarm 145: Lost Controller ON Feedback Signal 0 published records Thermo King Alarm 146: Software Version Mismatch 0 published records Thermo King Alarm 147: Check Multi-Temp Fan Speed Control Output (Zone) 0 published records Thermo King Alarm 148: Auto Switch Electric to Diesel Disabled 0 published records Thermo King Alarm 149: Alarm Not Identified 0 published records Thermo King Alarm 15: Check Glow Plugs or Intake Air Heater 0 published records Thermo King Alarm 150: Sensor Out of Range Low (DAS and HMI) (Zone) 0 published records Thermo King Alarm 151: Sensor Out of Range High (DAS and HMI) (Zone) 0 published records Thermo King Alarm 152: DAS Failed Sensor (DAS) 0 published records Thermo King Alarm 153: Expansion Module Flash Load Failure 0 published records Thermo King Alarm 154: Low Suction Pressure Switch Failure 0 published records Thermo King Alarm 155: Lost CAN Communications to HMI 0 published records Thermo King Alarm 156: Check Suction/Liquid Heat Exchanger Bypass Valve 0 published records Thermo King Alarm 157: OptiSet Plus Profile Mismatch 0 published records Thermo King Alarm 158: Primary Software Failed to Load 0 published records Thermo King Alarm 159: Check Battery Condition 0 published records Thermo King Alarm 16: Manual Start Not Completed 0 published records Thermo King Alarm 160: Lost CAN Communications to Radio Expansion Board 0 published records Thermo King Alarm 161: Log DAS Real Time Clock Invalid (DAS) 0 published records Thermo King Alarm 163: Emission Control Failure 0 published records Thermo King Alarm 17: Engine Failed to Crank 0 published records Thermo King Alarm 175: Check Electronic Expansion Valve (CR) 0 published records Thermo King Alarm 176: Check Evaporator Pressure Sensor (CR) 0 published records Thermo King Alarm 177: Check CO2 Tank Pressure Sensor (CR) 0 published records Thermo King Alarm 178: Low CO2 Fuel Level (CR) 0 published records Thermo King Alarm 18: High Engine Coolant Temperature 0 published records Thermo King Alarm 180: TriPac Compressor Alarm 0 published records Thermo King Alarm 188: Log DAS Microprocessor Fault (DAS) 0 published records Thermo King Alarm 19: Low Engine Oil Pressure 0 published records Thermo King Alarm 20: Engine (Vapor Motor CR) Failed to Start 0 published records Thermo King Alarm 203: Check Display Return Air Sensor (Zone) 0 published records Thermo King Alarm 204: Check Display Discharge Air Sensor (Zone) 0 published records Thermo King Alarm 21: Cooling Cycle Check (Zone) 0 published records Thermo King Alarm 216: Check DAS Digital Inputs (DAS) 0 published records Thermo King Alarm 22: Heating Cycle Check (Zone) 0 published records Thermo King Alarm 23: Cooling Cycle Fault (Zone) 0 published records Thermo King Alarm 233: REB Switching Off, Conservative to Full Null 0 published records Thermo King Alarm 234: Check Relative Humidity Sensor Circuit 0 published records Thermo King Alarm 235: High Engine Coolant Temperature Check 0 published records Thermo King Alarm 24: Heating Cycle Fault (Zone) 0 published records Thermo King Alarm 25: Alternator Check 0 published records Thermo King Alarm 250: DAS Clock Time Reset (DAS) 0 published records Thermo King Alarm 251: Check Radio Expansion Board Configuration 0 published records Thermo King Alarm 252: Check Auto Fresh Air Exchange Circuit 0 published records Thermo King Alarm 253: REB On Back Up Battery, Alarms Disabled 0 published records Thermo King Alarm 254: Check Auxiliary Coolant Temp Sensor 0 published records Thermo King Alarm 26: Check Refrigeration Capacity (Zone) 0 published records Thermo King Alarm 27: Vapor Motor RPM High (CR) 0 published records Thermo King Alarm 28: Pretrip or Self Check Abort 0 published records Thermo King Alarm 29: Defrost Damper Circuit Check (Zone) 0 published records Thermo King Alarm 30: Defrost Damper Stuck Closed (Zone) 0 published records Thermo King Alarm 31: Check Oil Pressure Switch 0 published records Thermo King Alarm 32: Refrigeration Capacity Low (Zone) 0 published records Thermo King Alarm 33: Check Engine RPM 0 published records Thermo King Alarm 34: Check Modulation Circuit 0 published records Thermo King Alarm 35: Check Run Relay Circuit 0 published records Thermo King Alarm 36: Electric Motor Failed to Run 0 published records Thermo King Alarm 37: Check Engine Coolant Level 0 published records Thermo King Alarm 38: Electric Phase Reversed 0 published records Thermo King Alarm 39: Check Water Valve Circuit 0 published records Thermo King Alarm 40: Check High Speed Circuit 0 published records Thermo King Alarm 41: Check Engine Coolant Temp 0 published records Thermo King Alarm 42: Unit Forced to Low Speed 0 published records Thermo King Alarm 43: Unit Forced to Low Speed Modulation 0 published records Thermo King Alarm 44: Check Fuel System 0 published records Thermo King Alarm 45: Check Hot Gas or Hot Gas Bypass Circuit 0 published records Thermo King Alarm 46: Check Air Flow (Zone) 0 published records Thermo King Alarm 47: Remote Sensor Shutdown 0 published records Thermo King Alarm 48: Check Belts or Clutch 0 published records Thermo King Alarm 49: Check Spare Sensor 1 0 published records Thermo King Alarm 50: Reset Clock 0 published records Thermo King Alarm 500: Check Host Evaporator Blower Low Speed 0 published records Thermo King Alarm 501: Check Host Evaporator Blower High Speed 0 published records Thermo King Alarm 505: Check Roadside Condenser Fan Motor Speed Circuit 0 published records Thermo King Alarm 506: Check Curbside Condenser Fan Motor Speed Circuit 0 published records Thermo King Alarm 507: Check Digital Scroll Output Circuit (Scroll Only) 0 published records Thermo King Alarm 508: Speed Request Communication Error 0 published records Thermo King Alarm 509: ECU Failed to Enable 0 published records Thermo King Alarm 51: Check Shutdown Circuit 0 published records Thermo King Alarm 510: ECU Run Signal Failed 0 published records Thermo King Alarm 511: Engine Wait to Start Time Delay Expired 0 published records Thermo King Alarm 512: High Compressor Suction Pressure (Scroll Only) 0 published records Thermo King Alarm 513: Low Compressor Suction Ratio (Scroll Only) 0 published records Thermo King Alarm 514: Low Compressor Discharge Pressure (Scroll Only) 0 published records Thermo King Alarm 515: Minimum ETV Discharge Superheat Temp (Scroll) 0 published records Thermo King Alarm 516: I/O Controller to Application Controller Com Failure 0 published records Thermo King Alarm 518: Generator Ground Fault 0 published records Thermo King Alarm 519: Check Battery Charger Input Power 0 published records Thermo King Alarm 52: Check Heat Circuit (Zone) 0 published records Thermo King Alarm 520: Check Battery Charger Output Power 0 published records Thermo King Alarm 521: Battery Charger External/Environmental Fault 0 published records Thermo King Alarm 522: Battery Temperature Sensor Alarm 0 published records Thermo King Alarm 523: Battery Charger Indicated Conditions 0 published records Thermo King Alarm 524: Generator Op Limit Vout to Frequency Ration 0 published records Thermo King Alarm 525: Generator Frequency Range Fault 0 published records Thermo King Alarm 526: Generator Operational Limit Output Current 0 published records Thermo King Alarm 528: Failed J1939 CAN Comm Base Controller/Charger 0 published records Thermo King Alarm 529: Check Fuel Pump Circuit 0 published records Thermo King Alarm 53: Check Economizer Valve Circuit 0 published records Thermo King Alarm 530: Low Pressure Differential (Scroll only) 0 published records Thermo King Alarm 531: Check Economizer Pressure Sensor (Scroll only) 0 published records Thermo King Alarm 538: Engine J1939 CAN Data Link Degraded 0 published records Thermo King Alarm 539: Engine J1939 CAN Data Link Failed 0 published records Thermo King Alarm 54: Test Mode Timeout 0 published records Thermo King Alarm 540: Illegal Engine Operating State 0 published records Thermo King Alarm 542: Battery Charger Fault – Unit Forced to Low Speed 0 published records Thermo King Alarm 543: Battery Charger Internal Short 0 published records Thermo King Alarm 544: Battery Charger External Short 0 published records Thermo King Alarm 545: Battery Charger Output Voltage Exceeded Limit 0 published records Thermo King Alarm 546: Battery Charger Operating Bulk Voltage Out of Range 0 published records Thermo King Alarm 547: AC Bus Phase Loss 0 published records Thermo King Alarm 548: Battery Charger Temperature Below Operating Range 0 published records Thermo King Alarm 549: Battery Charger AC Input Overvoltage 0 published records Thermo King Alarm 55: Check Engine Speeds 0 published records Thermo King Alarm 550: Battery Charger Internal Overvoltage Fault 0 published records Thermo King Alarm 56: Check Evaporator Fan Low Speed (Zone) 0 published records Thermo King Alarm 57: Check Evaporator Fan High Speed (Zone) 0 published records Thermo King Alarm 599: Engine Service Tool Connected 0 published records Thermo King Alarm 600: Check Crankshaft Speed Sensor 0 published records Thermo King Alarm 601: Check Camshaft Speed Sensor 0 published records Thermo King Alarm 603: Check Exhaust Pressure Sensor 0 published records Thermo King Alarm 604: Check Coolant Temp Sensor 0 published records Thermo King Alarm 605: Check Fresh Air Temp Sensor 0 published records Thermo King Alarm 607: Check Fuel Temperature Sensor 0 published records Thermo King Alarm 608: Check Rail Pressure Sensor 0 published records Thermo King Alarm 609: Check Intake Pressure Sensor 0 published records Thermo King Alarm 61: Low Battery Voltage 0 published records Thermo King Alarm 610: Check Atmospheric Pressure Sensor 0 published records Thermo King Alarm 611: Check Glow Plug Circuit 0 published records Thermo King Alarm 613: Check Injectors 0 published records Thermo King Alarm 614: Check High Pressure Fuel Pump 0 published records Thermo King Alarm 615: Rail Pressure Fault 0 published records Thermo King Alarm 616: Engine Overspeed 0 published records Thermo King Alarm 617: Internal ECU Fault 0 published records Thermo King Alarm 618: Check EGR System 0 published records Thermo King Alarm 619: ECU Main Relay Fault 0 published records Thermo King Alarm 62: Ammeter Out of Calibration 0 published records Thermo King Alarm 620: No RPM Detected During Start Attempt 0 published records Thermo King Alarm 623: TRUCAN Message Timeout 0 published records Thermo King Alarm 624: Check EGR Temperature Sensor 0 published records Thermo King Alarm 625: Check Intake Air Temperature Sensor 0 published records Thermo King Alarm 626: Check Exhaust Temperature Sensor 0 published records Thermo King Alarm 63: Engine or Vapor Motor Stopped 0 published records Thermo King Alarm 64: Pretrip Reminder 0 published records Thermo King Alarm 642: ECU Forced Low Speed 0 published records Thermo King Alarm 65: Abnormal Temperature Differential (Zone) 0 published records Thermo King Alarm 66: Low Engine Oil Level 0 published records Thermo King Alarm 67: Check Liquid Line Solenoid Circuit (Zone) 0 published records Thermo King Alarm 68: Internal Controller Fault Code 0 published records Thermo King Alarm 699: Unknown ECU Fault 0 published records Thermo King Alarm 70: Hourmeter Failure 0 published records Thermo King Alarm 71: Hourmeter 4 Exceeds Set Time Limit 0 published records Thermo King Alarm 72: Hourmeter 5 Exceeds Set Time Limit 0 published records Thermo King Alarm 73: Hourmeter 6 Exceeds Set Time Limit 0 published records Thermo King Alarm 74: Controller Reset to Defaults 0 published records Thermo King Alarm 75: Controller RAM Failure 0 published records Thermo King Alarm 76: Controller EPROM Failure 0 published records Thermo King Alarm 77: Controller EPROM Checksum Failure 0 published records Thermo King Alarm 78: Data Log EPROM Failure 0 published records Thermo King Alarm 79: Internal Data Logger Overflow 0 published records Thermo King Alarm 80: Check Compressor Temp Sensor 0 published records Thermo King Alarm 800: Crankshaft Position Sensor Error 0 published records Thermo King Alarm 801: Camshaft Position Sensor Error 0 published records Thermo King Alarm 804: Engine Coolant Temperature Sensor Error 0 published records Thermo King Alarm 807: Fuel Temperature Sensor Error 0 published records Thermo King Alarm 808: Rail Pressure Sensor Error 0 published records Thermo King Alarm 809: Intake Air Pressure Sensor Error 0 published records Thermo King Alarm 81: High Compressor Temp 0 published records Thermo King Alarm 810: Atmospheric Pressure Sensor Error 0 published records Thermo King Alarm 811: Glow Plug Circuit Error 0 published records Thermo King Alarm 813: General Injector Error 0 published records Thermo King Alarm 815: Fuel Pressure Regulator Error 0 published records Thermo King Alarm 818: EGR Valve Actuator Error 0 published records Thermo King Alarm 819: ECU Power Relay Error 0 published records Thermo King Alarm 82: High Compressor Temp Shutdown 0 published records Thermo King Alarm 825: T1 Air Intake Temperature Sensor Error 0 published records Thermo King Alarm 826: T2 Air Intake Temperature Sensor Error 0 published records Thermo King Alarm 827: EGR Valve Position Sensor Error 0 published records Thermo King Alarm 828: Lambda System Error 0 published records Thermo King Alarm 829: Main ECU Relay Error 0 published records Thermo King Alarm 83: Low Engine Coolant Temp 0 published records Thermo King Alarm 830: Air Flow Meter Error 0 published records Thermo King Alarm 832: Engine Power Supply Error 0 published records Thermo King Alarm 833: High Pressure Pump Fuel Metering Unit Error 0 published records Thermo King Alarm 834: Water in Fuel Sensor Error 0 published records Thermo King Alarm 836: Major ECU Failures 0 published records Thermo King Alarm 838: Intake Air System Error 0 published records Thermo King Alarm 839: Engine Speed Error 0 published records Thermo King Alarm 84: Restart Null 0 published records Thermo King Alarm 840: Fuel Injection Energizing Error 0 published records Thermo King Alarm 841: High Pressure Pump Wear 0 published records Thermo King Alarm 842: Engine Running in Safe Mode – Low Speed 0 published records Thermo King Alarm 843: Fuel Injection System Error 0 published records Thermo King Alarm 844: Engine Failed to Crank 0 published records Thermo King Alarm 845: Starter Relay Error 0 published records Thermo King Alarm 846: T50 Switch Error 0 published records Thermo King Alarm 847: Variant Coding Error 0 published records Thermo King Alarm 85: Forced Unit Operation 0 published records Thermo King Alarm 853: Engine Overspeed (No DTC) 0 published records Thermo King Alarm 854: Engine Protection Self Shutdown 0 published records Thermo King Alarm 86: Check Discharge Pressure Sensor 0 published records Thermo King Alarm 87: Check Suction Pressure Sensor 0 published records Thermo King Alarm 89: Check Electronic Throttling Valve (ETV) Circuit 0 published records Thermo King Alarm 899: Unknown ECU Fault 0 published records Thermo King Alarm 90: Electric Overload 0 published records Thermo King Alarm 91: Check Electric Ready Input 0 published records Thermo King Alarm 92: Sensor Grades Not Set (Zone) 0 published records Thermo King Alarm 93: Low Compressor Suction Pressure 0 published records Thermo King Alarm 94: Check Loader #1 Circuit 0 published records Thermo King Alarm 95: Check Loader #2 Circuit 0 published records Thermo King Alarm 96: Low Fuel Level 0 published records Thermo King Alarm 97: Failed Remote Return Air Sensor (CR) 0 published records Thermo King Alarm 98: Check Fuel Level Sensor 0 published records Thermo King Alarm 99: High Compressor Pressure Ratio 0 published records Thermo King Alarm dr1: Door 1 Open/Door Switch 1 Failure 0 published records Thermo King Alarm dr2: Door 2 Open/Door Switch 2 Failure 0 published records Thermo King Alarm HP: High Discharge Pressure 0 published records Thermo King Alarm LP: Low Suction Pressure 0 published records Thermo King Alarm P1E: Return Air Temperature Sensor Fault 0 published records Thermo King Alarm SOF: Microprocessor Software Failure 0 published records Thermo King Alarm tEP: Electric Standby Motor Thermal Protection Alarm 0 published records