AC1234-4SL full machine image
Scale lock closeup image
Scale lock underneath machine image
AC1234-4SL full machine image
Scale lock closeup image
Scale lock underneath machine image

Premier R-1234yf Recover, Recycle and Recharge Machine for Mobile Service

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


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  • 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
107 cm x 56 cm x 80 cm
5 × 9 cm (4.3-in. diag) graphical LCD
150 kg (330 lb)
10-50°C (50-122°F), 86% RH non-condensing
Ø 100 mm (3.9 in.)
Maximum Pressure
31 bar (450 PSI)
<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
82 kg (176 lb)
Model Number
One Year

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AC1234-4SL full machine image






Refrigerant R-1234yf R-1234yf R134a
A/C Service Automatic Automatic Automatic
Manifold Values Automatic - Not required Automatic - Not required Automatic - Not required
Recovery Efficiency 98.50% 98.50% 98.50%
Charge Accuracy +/- .5 oz +/- .5 oz +/- .5 oz
Automatic Internal Tank Refill Yes Yes Yes
Auto Oil Drain Yes Yes Yes
Auto Oil Injection No No Yes, 1 bottle
UV Dye Injection No No No
Air Purge Automatic Automatic Automatic
A/C Component Flushing Yes Yes Yes
Vacuum Leak Test No No Yes
Nitrogen Leak Test No No No
Vehicle Data Optional, 34413-C Optional, 34414-A Optional, 34412-E
Service Record Storage Yes Yes Yes
Refrigerant Management Yes Yes Yes
Display 4.3” LCD Display 5.7” LCD Display 5” x 9” Color, Graphical Display
Vacuum Pump 1.5 cfm dual stage (35 microns) 1.5 cfm dual stage (35 microns) 1.5 cfm dual stage (35 microns)
Internal Tank 30 lb 30 lb 30 lb
Hose Length 12 ft 9 ft 9 ft
Printer Optional, 30038 Yes Optional, 30038
Notification Light Yes Yes Yes
WiFi Capable Yes, requires 80211TMP or 80211VCI master kit No Yes, requires 80211TMP or 80211VCI master kit
Audio No Yes No
USB port Yes Yes Yes
Cord Wrap Yes Yes Yes
Filter-Drier Capacity 330 lbs 330 lbs 150 lbs
Warranty 1 Year 1 Year 1 Year
Service Over 255 trained and certified service facilities Over 255 trained and certified service facilities Over 255 trained and certified service facilities
Meets SAE J-2788 Requirements Yes
RJ45 Ethernet Connector WiFi capable with 80211TMP or 80211VCI master kit Yes WiFi capable with 80211TMP or 80211VCI master kit
Integrated Refrigerant Identifier Yes Yes No
Contaminated Refrigerant Removal Port Yes Yes No
Meets SAE J-2843 Requirements Yes Yes
Meets SAE J-2927 Yes Yes
Hybrid/EV capable Yes Yes No
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