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.

• Haas Alarm 102 — Servo Drive Fault Fix

  10 Apr, 2024

  Haas Alarm 102 means a servo drive fault has been detected on an axis. This guide covers diagnosis and fixes for the Haas CNC servo fault alarm.

• Rinnai Error Code 11 - No Ignition Fix

  9 Apr, 2024

  Rinnai error code 11 means the tankless water heater failed to ignite. This guide covers every cause and fix for the Rinnai Code 11 ignition failure.

• Mitsubishi E1 Communication Fault

  5 Apr, 2024

  Mitsubishi E1 means indoor and outdoor units lost communication. Check S-terminal wiring, zone wiring, power supplies, and indoor or outdoor PCBs.

• Daikin E7 Outdoor Fan Motor Error

  4 Apr, 2024

  Daikin E7 guide for outdoor fan motor faults, stalled blades, Hall feedback, motor windings, inverter-board output, connectors, and debris.