Pioneer Multi (4) Circuit Diamante Ultra Series 21.5 SEER2 Quad Zone Outdoor Section Inverter++ Energy-Star Air Conditioner Heat Pump 230V - YN040GLFI22M4D
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Power Supply: 208~230V, 60Hz, 1Ph
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Communication Protocol: Current Loop
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Min-Max Load Attached: 24,000~48,000 BTU/h
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Cooling Rated Capacity: 33,000 BTU/h
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Cooling SEER2 (Ductless): 21.5 BTU/W.h
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Cooling EER2 (Ductless): 12.0 BTU/W.h
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Heating Rated Capacity: 35,600 BTU/h
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Heating HSPF2 (Ductless): 9.0 BTU/W.h
- Heating C.O.P.2 (47°F/5°F): 3.6 / 2.12 W/W
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Refrigerant Type: R410a
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Suitable Area: 750~1,500 Sq.F
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Sound Level: 63.0 dB(A)
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Circuit Breaker Utilized: 25A (double-pole)
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Net Dimensions (WDH): 39"-1/4 x 15"-5/8 x 35"-1/2
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Carton Dimensions (WDH): 41" x 17"-3/8 x 39"-3/8
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Net / Gross Weight: 166.1 / 186 Lbs
Manuals
What our Experts Think
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Sized for medium rooms (~200–450 sq ft)
This 12,000 BTU 115 V mini‑split full set is well‑suited for bedrooms, home offices, dens, or small open‑plan areas, providing consistent cooling and heating without oversized capacity.
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Ultra‑high efficiency (22.7 SEER2 + Energy‑Star certified)
22.7 SEER2 seasonal efficiency delivers notable energy savings and lower operating costs compared with many conventional HVAC systems, with cooling costs ~ $74/year and heating ~ $221/year estimates.
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Inverter++ DC technology for comfort control
Variable‑speed DC inverter technology ensures precise temperature regulation, quieter cycling, and faster comfort recovery versus fixed‑speed units—improving day‑to‑day performance.
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All‑season heat pump operation
Provides both cooling and heating, plus dry/ventilation modes in one integrated system, so you don’t need separate equipment across seasons.
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115 V standard power (easy setup)
Runs on 110–120 V household circuits, avoiding costly electrical upgrades and simplifying installation in many homes.
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Quiet indoor & outdoor performance
Indoor sound levels can be as low as ~23 dB, keeping operation unobtrusive, while the outdoor unit runs at ~52.5 dB—comfortable for residential settings.
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Complete full‑set with accessories
Includes indoor and outdoor units, wireless remote, leak guard sealer, installation manual, and warranty coverage, giving you what’s needed for a standard install.
Q&A
Q: What room size is this 12,000 BTU mini split ideal for?
A: Perfect for small to medium rooms (approx. 350–500 sq. ft.), such as bedrooms, offices, or compact living areas.
Q: Is this unit Energy Star certified?
A: Yes, it is Energy Star certified, ensuring high energy efficiency and lower operating costs.
Q: Does it provide both cooling and heating?
A: Yes, this inverter++ heat pump delivers year-round cooling and heating for consistent comfort.
Q: How energy-efficient is the 22.7 SEER2 rating?
A: With 22.7 SEER2, it provides excellent energy savings while maintaining steady temperatures.
Q: What voltage does it require?
A: Designed for standard 115V single-phase power, suitable for most residential circuits.
Q: What is included in the full set?
A: Includes indoor high-wall unit, outdoor condenser, and pre-charged installation kit for convenient setup.
Q: Does it support Wi-Fi or smart control?
A: Wi-Fi support may be available with compatible modules for remote operation and scheduling.
Q: How quiet is the indoor unit?
A: Operates quietly, typically 30–40 dB, ideal for bedrooms, offices, or living spaces.
Q: What comfort and usability features are included?
A: Turbo mode, ECO mode, sleep mode, self-cleaning, auto restart, timer, and multi-directional airflow for optimal comfort.
Q: Is professional installation required?
A: Yes, professional installation is recommended; the pre-charged kit covers standard connections, with additional piping needed for longer runs.
Maintenance Tips
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Clean washable air filters every 2–4 weeks – Maintains optimal airflow and 22.7 SEER2 Energy Star efficiency for 400–600 sq ft areas
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Run self-clean function regularly – Prevents mold, bacteria, and odor buildup inside the indoor unit
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Keep indoor & outdoor units free of dust and debris – Ensures consistent airflow and peak heat exchange
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Check and clear condensate drain line – Prevents leaks and water damage
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Maintain 2–3 ft clearance around outdoor unit – Supports efficient cooling/heating performance
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Inspect refrigerant lines annually – Ensures leak-free operation and reliable capacity
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Use ECO, Sleep & Wi-Fi smart modes (if available) – Reduces compressor wear and lowers energy consumption
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Schedule yearly professional servicing – Maximizes inverter efficiency and extends system lifespan
Damage 
Loss 
Theft 
