Panasonic C-9RVN273H0U DC Inverter Rotary Compressor – 6 HP / 72,000 BTU, R410A, ECO-i VRF

The Panasonic C-9RVN273H0U is a DC inverter-controlled hermetic rotary compressor used in Panasonic ECO-i VRF outdoor units. It runs on R410A; in the 6 HP / 72,000 BTU class (2,700 W rated motor output), it is the system's variable-capacity (inverter) compressor — while the fixed-speed scroll compressors beside it switch on and off, this compressor continuously adjusts its speed to modulate capacity to the building load.

The Inverter Compressor of ECO-i VRF Outdoor Units

• Which units use it: One unit each is fitted in the U-8MF1E8, U-10MF1E8, U-12MF1E8, U-14MF1E8 and U-16MF1E8 outdoor units of the 3-pipe heat recovery ECO-i MF1 series (service manual compressor list). In the 2-pipe ME1 series, the H0F variant of the same body is used on the U-10ME1E8 / U-12ME1E8.
• Inverter operating range ≈ 25-90 Hz: Runs at low speed at part load, eliminating start-stop losses; the compressor is not supplied directly from the mains but with variable voltage and variable frequency from the unit's IPM driver.
• DC brushless motor: 4-pole, insulation class E — a clear efficiency advantage at part load over fixed-speed equivalents with induction motors.
• With discharge temperature sensor: The sensor that protects the unit against overheating is on the compressor; the crankcase heater (28 W) prevents liquid migration into the oil at cold start.

Technical Specifications and Replacement Notes

• Model: Panasonic C-9RVN273H0U  |  Supply Code: 10.183.0005
• Type: Hermetic rotary, DC inverter-controlled (Sanyo/Panasonic 9RV series)
• Refrigerant: R410A  |  Application: High back pressure (HBP) — air conditioning / VRF
• Power Class: 6 HP (≈72,000 BTU/h)  |  Rated Motor Output: 2,700 W
• Motor: DC brushless, 4-pole, insulation class E
• Oil: DAPHNE FV68S (or equivalent)  |  Charge: 1.9 L (factory pre-charge)
• Driver Supply: Outdoor unit mains 380-415 V, 3N~, 50 Hz  |  U/V/W output from the inverter to the compressor
• Motor Voltage: 246 V (DC 3~) — from the product label  |  Max. Discharge Temperature: 125 °C
• Design Pressure: 4.15 MPa  |  Manufacture: Panasonic/Sanyo, Indonesia
• Operating Frequency: ≈25-90 Hz (25-100 Hz in the ME1 series)
• Protection: Discharge temperature sensor + 28 W crankcase heater

• This is an inverter compressor and is not connected directly to the mains. When measuring the winding resistance, look for balanced values across the three phases; do not test whether it "runs" by applying mains voltage.
• When replacing, first measure the oil in the removed compressor and top up the missing quantity — the service manual requires the remaining oil to be measured; excess oil circulates in the system and reduces capacity.
• R410A is a high-pressure refrigerant: Pull a deep vacuum and charge in the liquid phase; since ester oil absorbs moisture, remove the plugs immediately before installation.