Browse published fault-code records by brand, product and displayed code.
Each record starts with the source meaning, then separates applicability, owner-safe actions, operating uncertainty and qualified-service boundaries. A matching code string alone is not enough: confirm the brand, product, model and controller before acting.
Alarm 542 is listed as 'Battery Charger Fault – Unit Forced to Low Speed' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 543 is listed as 'Battery Charger Internal Short' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 544 is listed as 'Battery Charger External Short' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 545 is listed as 'Battery Charger Output Voltage Exceeded Limit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 546 is listed as 'Battery Charger Operating Bulk Voltage Out of Range' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 547 is listed as 'AC Bus Phase Loss' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 548 is listed as 'Battery Charger Temperature Below Operating Range' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 549 is listed as 'Battery Charger AC Input Overvoltage' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 550 is listed as 'Battery Charger Internal Overvoltage Fault' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 599 is listed as 'Engine Service Tool Connected' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 600 is listed as 'Check Crankshaft Speed Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 601 is listed as 'Check Camshaft Speed Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 603 is listed as 'Check Exhaust Pressure Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 604 is listed as 'Check Coolant Temp Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 605 is listed as 'Check Fresh Air Temp Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 607 is listed as 'Check Fuel Temperature Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 608 is listed as 'Check Rail Pressure Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 609 is listed as 'Check Intake Pressure Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 610 is listed as 'Check Atmospheric Pressure Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 611 is listed as 'Check Glow Plug Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 613 is listed as 'Check Injectors' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 614 is listed as 'Check High Pressure Fuel Pump' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 615 is listed as 'Rail Pressure Fault' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Alarm 616 is listed as 'Engine Overspeed' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01