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.

• Cummins Generator Error Codes: Complete Guide

  Updated: 17 Sep, 2026

  Cummins generator fault-code guide for PowerCommand and Onan controllers, engine shutdowns, AVR faults, sensors, actuators, and reset checks.

• Kohler Generator Error Codes: Complete Guide

  Updated: 17 Sep, 2026

  Kohler generator guide for Decision-Maker and APM controller faults, LED flashes, LCD alarms, AVR issues, speed faults, and battery checks.

• Yaskawa GA700 OC Fault — Overcurrent Fix

  Updated: 17 Sep, 2026

  Diagnose Yaskawa GA700 OC Fault - Overcurrent Fix: likely causes to check, measurements to verify, and repair decisions before parts replacement.

• Haas CNC Alarm Codes - VF, ST, Servo, Spindle, ATC

  Updated: 17 Sep, 2026

  Haas CNC alarm guide for VF and ST machines: 100-series stops, low lube, spindle alarms, servo faults, ATC errors, and reset checks.