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.

• Fanuc Alarm 800: APC Alarm — Causes and Fix

  22 Apr, 2026

  Fanuc Alarm 800 APC alarm: absolute pulse coder fault causes, diagnostic steps, and reset procedures for Fanuc 0i, 16i, 18i, 30i, and 31i systems.

• Flowserve Pump Fault Codes Guide — Seal and Drive Alarms

  22 Apr, 2026

  Flowserve pump fault codes and alarms for centrifugal pumps, mechanical seals, and SmartSeal monitoring systems: causes and troubleshooting.

• Haas Alarm 129: Spindle Orientation Error — Fix Guide

  22 Apr, 2026

  Haas Alarm 129 spindle orientation error: causes, diagnostic steps, and repair procedures for Haas VF, ST, and EC series CNC machines.

• Haas Alarm 130: Spindle Speed Error — Causes and Fix

  22 Apr, 2026

  Haas Alarm 130 spindle speed error: detailed causes, diagnostic steps, and repair procedures for Haas VF, ST, EC, and UMC series machines.