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Robinair AC1234-4 Setup and Operation Video


The AC1234-4SL is a fully automatic R-1234yf ACS machine with an integrated scale lock, designed for mobile service. The mechanical scale lock eliminates the need to recalibrate your refrigerant scale after transporting the machine long distances, saving time. Accessible from outside the machine, the lock secures the scale, preventing damage or inaccurate refrigerant measurement. The internal tank stays on the scale during transport. 


A safe startup feature prevents the machine from powering on if the lock is engaged. Extra-long 12' hoses make mobile service easier. An indicator light reminds technicians to lock the scale before transport, while special tie-down points and guidelines ensure your machine is safe and secure for mobile service.


AC1234-4SL meets or exceeds SAE J2843 standards for R-1234yf refrigerant recovery. The machine includes an integrated refrigerant identifier that samples the refrigerant in the vehicle’s A/C system prior to recovery. The AC1234-4SL is a highly accurate and reliable machine capable of servicing both standard and high-voltage vehicle A/C systems. The special AC1234-4SL version comes equipped with a mechanical scale lock, which prevents scale damage and is specifically design to handle the rough day to day use of mobile automotive A/C service.


  • Fully automatic operation — program for service, walk away and return when complete
  • 98.5% recovery efficiency
  • Charge accuracy within +/- ½ oz
  • Automatic internal tank refill. No stopping to fill the internal tank during service, or before service
  • Automatic oil drain shows how much oil was removed from the system during service
  • Automatic air purge removes the potential of air accumulating in the internal tank
  • Integrated refrigerant identifier (meets SAE J2927)
  • Meets SAE J2843 standards for R-1234YF Recover, Recycle and Recharge equipment
  • Programmable vacuum operation helps get to the necessary vacuum level in any condition quickly
  • System leak test to identify gross leaks in a system
  • Liquid refrigerant flushing function can flush A/C systems or individual components using liquid refrigerant instead of harsh chemicals
  • Optional Printer: Compatible with accessory printer 30038

Keep your machine operating with 34724 replacement filters, Robinair high vacuum pump oil and 13172 maintenance kits.


Integrated refrigerant identifier replacement parts:

  • 16913 filter
  • 16916 oxygen sensor
  • 16106 sample hose assembly



Dimensions 107 cm x 56 cm x 80 cm

Display 5 × 9 cm (4.3-in. diag) graphical LCD

Filter 150 kg (330 lb)

Humidity 10-50°C (50-122°F), 86% RH non-condensing

Gauges Ø 100 mm (3.9 in.)

Maximum Pressure 31 bar (450 PSI)

Noise <70 dB(A)

Nominal Voltage 115V, 60 Hz

Oil Drain Bottle Capacity 355 ml (12 oz)

Operating Temperature 10°C to 50°C (50°F to 122°F)

Power Consumption 1380 VA

Vacuum Pump 1.5 CFM (42 L/m) @ 60 Hz

Service Hoses 12' (3.65m) SAE J2886

Internal cylinder 30 lb DOT (13.6 kg); 21 lb (9.5 kg) capacity

Weight 82 kg (176 lb)

Model Number AC1234-4SL

UPC 637335048256

Warranty One Year


Kit Contents:

  • AC1234-4SL R-1234yf ACS Machine
  • Calibration check weight
  • Tank fill hose adapter
  • Service Center Listing sheet
  • Extended Service flyer
  • MVAC Equipment certification form
  • MACS 609 Certification flyer
  • SDS - Vacuum pump oil
  • SDS - POE Compressor Oil
  • Tie down straps
  • User Manual

Robinair AC1234-4SL Premier R-1234yf Recover, Recycle & Recharge for Mobile Use

SKU: R12344SL
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