Panasonic 5VD330ZAA21 DC Inverter Rotary Compressor – 3 HP / 34,500 BTU, R410A

Panasonic 5VD330ZAA21 is a DC inverter twin (dual-piston) rotary compressor operating with R410A refrigerant. With a displacement of 33.0 cm³/rev, it is in the 3 HP / ≈34,500 BTU class; it is used in split air conditioner outdoor units, VRF indoor modules, heat pumps and inverter-controlled commercial air conditioning units.

V Series DC Inverter Rotary: 33 cm³ Displacement

• DC inverter driven: Speed is continuously adjusted to the load; on-off cycling is eliminated, room temperature stays constant and there is no starting current load.
• Class efficiency: According to the Panasonic catalog, under ARI conditions 10,135 W (≈34,581 BTU/h) capacity, 3,185 W input, COP 3.18; under FC conditions 11,060 W (37,737 BTU), COP 4.68.
• With accumulator: Holds liquid refrigerant in the suction line; protects the compressor against liquid slugging.
• Compact and light: Fits narrow outdoor unit chassis and makes installation easy.

Technical Specifications and Installation Notes

• Model: Panasonic 5VD330ZAA21  |  Supply Code: 10.183.0061
• Type: Hermetic Panasonic V series vertical rotary, DC inverter driven
• Refrigerant: R410A  |  Application: High back pressure (HBP) — air conditioning
• Power Class: 3 HP  |  Capacity: ≈34,500 BTU/h (10,135 W, ARI)
• Displacement: 33.0 cm³/rev  |  COP: 3.18 (ARI) / 4.68 (FC)
• Motor: 3-phase DC brushless — supplied at variable frequency from the drive
• Speed Range: 15-110 rps  |  Design: Twin (dual-piston) rotary
• Body Dimensions: Body diameter Ø142.6 mm  |  Net Weight: 20.3 kg
• Accumulator: Ø75 mm, 119 mm from the body center
• Connection: Discharge tube inside diameter 9.65 mm  |  Accumulator inlet inside diameter 16.0 mm
• Mounting: V-type 3 feet, Ø176 mm hole circle (center to foot 88 mm), 3 × Ø19.1 mm holes, 120° spacing

• 🔧 It is an inverter compressor and is not connected directly to the mains. When replacing, also check the drive board; a faulty drive will burn out the new compressor too. Measure the winding resistance between the three terminals for balance.
• Do not remove the accumulator: It is the only component that protects the compressor against liquid return; it must be fitted together when replacing.
• R410A is a high-pressure refrigerant: Make sure the lines and fittings are rated for R410A pressure; always charge in the liquid phase.
• Ester oil absorbs moisture: Open the plugs just before installation and dry the system with a deep vacuum (≤500 micron).
• Upright mounting is required: Rotary compressors must not be run tilted; fix it upright on the chassis with vibration mounts.