yellow jacket 3788 Series Operation Manual Download Page 2

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Refrigerants: 

All Models:  R-134a 

 
Compressor: 

2-1/2 HP Hermetic Compressors  

Power Source: 

120V AC 60Hz for US Models  230V AC 50Hz for CE Models 

Amperage:   

RLA:  8.5    

 

 

RLA: 

 

 

 

FLA:  11.0   

 

 

FLA: 

 

 

 

LRA:  30.0   

 

 

LRA: 19.0 

 

 

 

 

 

Size:   

 

37880  

Height: 

 

45 inches 

 

 

Width: 

 

19.5 inches   

 

Depth: 

 

29 inches 

 

 

Weight: 

 

Maximum is deluxe unit at 225 lb. with tank 

Before operating this unit, please read this 
manual thoroughly. You must understand the 
procedures outlined in this manual. Failure to 
follow these procedures could void all war-
ranties. 
 
Before handling refrigerants, read the material 
safety data sheet (MSDS) from the refrigerant 
manufacturer.

 

Inhalation of high concentration of refriger-
ant vapors is harmful and may cause heart 
irregularities, unconsciousness, or death. 
Deliberate inhalation of refrigerants is ex-
tremely dangerous. Death can occur without 
warning. Vapors reduce oxygen available 
for breathing and are heavier than air. De-
composition products are hazardous. Liquid 
contact can cause frostbite.  All refrigerant 
containers, equipment, and hoses are under 
pressure.

 

3788X Series Refrigerant Management System  

 

Section 

Page  Section 

Page 

Specifications  

OPTION 6:  Tank Refill  

10 

Safety Instructions 

OPTION 7:  Refrigerant Management System  

11 

Component Diagram 

Purging Non-Condensable Gases  

12 

Control Panel Overview 

Maintenance Reminders  

12 

Setup/Check List/User Op-
tions 

Filter change/compressor oil/vacuum oil 

13 

Option 1:  Recovery Only  

Troubleshooting Information  

14 

OPTION 2:  Vacuum  

Common Problems  

14 

OPTION 3:  Charge Only  

LCD Error Messages  

15 

OPTION 4:  Full Cycle  

Repair Parts List  

16 

OPTION 5:  Oil Inject 

10 

Warranty Information 

16 

Table of Contents 

Specifications 

Summary of Contents for 3788 Series

Page 1: ...Operation Manual 37837 37880 37881 37882 37887 37888 37889 3788X Series includes 37837 P N 380539 RevF...

Page 2: ...Deliberate inhalation of refrigerants is ex tremely dangerous Death can occur without warning Vapors reduce oxygen available for breathing and are heavier than air De composition products are hazardo...

Page 3: ...por form is a potentially hazardous material Please consult the manufacturer s Material Safety Data Sheet for additional information and adhere to the following safety guidelines Avoid breathing high...

Page 4: ...Low Gauge 4 Auto High Side Hose Red 5 Auto Low Side Hose Blue 6 Tank Vapor Hose Red 7 Tank Liquid Hose Blue 8 Oil Drain Bottle 9 Oil Inject Bottle excluded on 37837 37887 and 37888 10 Tool Tray 11 Ma...

Page 5: ...Option 2 Vacuum is used to vacuum air moisture from a system previously opened to the atmosphere This Option will then proceed to recharge the A C system This Option also allows the technician to veri...

Page 6: ...system problem Ensure the automobile A C system is turned off prior to selecting a mode on the machine 3 Connect the high and low side auto service hoses to the respective high and low side ser vice...

Page 7: ...NTIES AND MY CAUSE DAMAGE TO OTH ER AUTOMOBILES THAT YOU SERVICE IN THE FU TURE RECOVER cont VACUUM The vacuum function of the 37880 SERIES is de signed to remove air moisture from the automobile A C...

Page 8: ...X 1 Verify the auto air conditioning system is off 2 Select CHARGE option from the main menu 3 When the LCD reads SET CHARGE AMOUNT set the amount of refrigerant to be charged into the A C system by u...

Page 9: ...he hold time will count down on the LCD and the unit will beep at the end of the hold time If vacuum hold time was set to zero the unit will transition into charge mode 11 Record the final vacuum leve...

Page 10: ...a hybrid A C system can cause serious issues with the electrical system Having too much of the wrong type of oil in a hybrid A C system can conduct the electricity to the outside of the A C compressor...

Page 11: ...follow the instructions on the screen and the unit will clear itself automatically Repeat the identification process to insure the proper identification of the refrigerant purity level If the unit fa...

Page 12: ...nged periodically to ensure the system is working properly A maintenance reminder prompts you when to change your filters All refrigerant must be removed from the old filters before they are removed F...

Page 13: ...d maintenance Check oil level when pump is running When pump is running oil level should be 1 2 to 5 8 up in the sight glass This level is necessary for proper operation This maintenance is best perfo...

Page 14: ...o a 120 Volt outlet Circuit breaker tripped on shop power panel Bad Main Power switch Loose wire Bad Transformer on microprocessor board Plug into outlet Reset circuit breaker If circuit breaker immed...

Page 15: ...SCALE CALIBRATION ERROR 6 TANK EMPTY REFRIGERANT BELOW 5 OF TANK CAPACITY REFILL TANK CHECK SCALE CALIBRATION ERROR 7 NOT ENOUGH REFRIGERANT UNIT IS LOW ON REFRIGERANT 10 LB MIN REFILL TANK ERROR 8 TA...

Page 16: ...ges Series 41 Manifold valves can be reconditioned using replacement seating cylinder 41133 There will be a reconditioning charge for manifolds returned to the factory for repair If found defective we...

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