Ductless Mini-Splits

Inverter operation, line-set and flares, vacuum and nitrogen, fault-code concepts and clean commissioning.

5 guides

• Commissioning a Ductless Mini-Split System
  A start-to-finish commissioning sequence for a ductless install: verifying mechanical and electrical work, releasing charge, running the system, and documenting performance so you know the install is right before you leave.
• Flaring Line Sets Correctly and Flare Torque Specs
  How to cut, deburr, and form a clean 45-degree flare on mini-split line sets, the torque ranges by line size, and the mistakes that cause flare leaks.
• How Inverter (Variable-Speed) Mini-Splits Work
  Plain-language explanation of how variable-speed inverter mini-splits ramp compressor speed instead of cycling, why that makes them efficient, and what changes for the tech compared to a fixed-speed system.
• Nitrogen Pressure Test and Evacuation on a Mini-Split Install
  The order of operations for proving a mini-split line set tight with nitrogen and then evacuating to a deep vacuum, with target pressures, hold times, and the micron decay check before releasing charge.
• Reading Mini-Split Fault Codes — The Approach
  How to approach ductless fault codes as a diagnostic system — where codes are displayed, the common fault families and what they point to, and how to use a code as a starting clue rather than a final answer.

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