HVAC, Appliance, CNC, and VFD Error Code Repair Guides
Browse repair guides for HVAC, appliances, refrigeration, CNC alarms, VFD faults, generators, boilers, water heaters, and commercial equipment.
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Fanuc Alarm 460 — Spindle Overload
Fanuc Alarm 460 means spindle overload. Check cutting load, dull tooling, bearings, belts, gearbox drag, drive cooling, and spindle load at idle.
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Fujitsu Mini-Split Error Code E9 — Refrigerant Circuit Fault
Fujitsu mini-split E9 guide for refrigerant-circuit faults, EEV coil checks, loose connectors, PCB driver issues, and pro-service decisions.
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Haas Alarm 121 - ATC Arm Fault
Haas Alarm 121 means the automatic tool changer arm failed to complete its motion correctly. Learn the causes and how to fix Haas Alarm 121.
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Haas Alarm 122 — ATC Chain Fault
Haas Alarm 122 means the automatic tool changer chain or carousel failed to index correctly. Learn the causes and how to fix Haas Alarm 122.