Cornwell Tools RAC34788 Le manuel du propriétaire

Marque: Cornwell Tools

Modèle: RAC34788

Taper: Le manuel du propriétaire

Operating Manual for

Model 34788

Recovery, Recycling, Recharging Unit

SAFETY DEFINITIONS: Follow all WARNING, CAUTION, IMPORTANT, and NOTE messages in this manual. These messages

are defined as follows: WARNING means you may risk serious personal injury or death; CAUTION means you may risk personal

injury, property damage, or unit damage; IMPORTANT means you may risk unit damage; and NOTEs and OPERATING TIPS provide

clarity and helpful information. These safety messages cover situations ROBINAIR is aware of. ROBINAIR cannot know, evaluate,

and advise you as to all possible hazards. You must verify that conditions and procedures do not jeopardize your personal safety.

DISCLAIMER: Information, illustrations, and specifications contained in this manual are based on the latest information available at

the time of publication. The right is reserved to make changes at any time without obligation to notify any person or organization of

such revisions or changes. Further, ROBINAIR shall not be liable for errors contained herein or for incidental or consequential damages

(including lost profits) in connection with the furnishing, performance, or use of this material. If necessary, obtain additional health

and safety information from the appropriate government agencies and the vehicle, refrigerant, and lubricant manufacturers.

ALLOW ONLY QUALIFIED PERSONNEL TO OPERATE THE UNIT. Before operating the unit, read and follow

the instructions and warnings in this manual. The operator must be familiar with air conditioning and refrigeration

systems, refrigerants, and the dangers of pressurized components. If the operator cannot read this manual,

operating instructions and safety precautions must be read and discussed in the operator’s native language.

– Si el operador no puede leer las instrucciones, las instrucciones de operación y las precauciones de seguridad

deberán leerse y comentarse en el idioma nativo del operador.

– Si l’utilisateur ne peut lire les instructions, les instructions et les consignes de sécurité doivent lui être expliquées

dans sa langue maternelle.

PRESSURIZED TANK CONTAINS LIQUID REFRIGERANT. Do not overfill the internal storage vessel, because

overfilling may cause explosion and personal injury or death. Do not recover refrigerants into nonrefillable

containers; use only federally authorized refillable containers (DOT spec. 4BW or 4BA).

HOSES MAY CONTAIN LIQUID REFRIGERANT UNDER PRESSURE. Contact with refrigerant may cause

personal injury. Wear protective equipment, including safety goggles. Disconnect hoses using extreme caution.

DO NOT BREATHE REFRIGERANT AND LUBRICANT VAPOR OR MIST. Exposure may cause personal

injury, especially to the eyes, nose, throat, and lungs. Use the unit in locations with mechanical ventilation that

provides at least four air changes per hour. If accidental system discharge occurs, ventilate the work area before

resuming service.

DO NOT USE AN EXTENSION CORD. An extension cord may overheat and cause fire. If you must use an

extension cord, use the shortest possible cord with a minimum size of 14 AWG.

TO REDUCE THE RISK OF FIRE, do not use the unit in the vicinity of spilled or open containers of gasoline or

other flammable substances.

DO NOT USE COMPRESSED AIR TO PRESSURE TEST OR LEAK TEST THE UNIT OR VEHICLE AIR

CONDITIONING SYSTEM. Some mixtures of air and R-134a refrigerant are combustible at elevated pressures.

These mixtures are potentially dangerous and may result in fire or explosion causing personal injury or property

damage.

USE THIS UNIT WITH R-134a REFRIGERANT ONLY. The unit is designed to recover, recycle, and recharge

only R-134a refrigerant. Do not attempt to adapt the unit for another refrigerant. Do not mix refrigerant types

through a system or in the same container; mixing of refrigerants will cause severe damage to the unit and the

vehicle air conditioning system.

HIGH VOLTAGE ELECTRICITY INSIDE THE UNIT HAS A RISK OF ELECTRICAL SHOCK. Exposure may

cause personal injury. Disconnect the power before servicing the unit.

WARNINGS

Model 34788

Recovery, Recycling, & Recharging Unit

OPERATING NOTE: At temperatures exceeding 120° F / 49° C, wait 10 minutes between recovery jobs.

539602 Rev. B, September 20, 2007

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Keypad Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Menu Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Unpack the Accessory Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Power Up the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Select a Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Select Operating Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Set Tank Fill Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Add Oil to the Vacuum Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Fill the Internal Storage Vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Recover Refrigerant from a Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Evacuate the A/C System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Replenish A/C System Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Recharge the A/C System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Operating Instructions — Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Electrical Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Manually Fill the Internal Storage Vessel (ISV) . . . . . . . . . . . . . . . . . . . . . . . . 15

Replace the Filter-Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Check Remaining Filter Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Change the Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Adjust Tank Fill Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Change Vacuum Pump Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Scale Calibration Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Check for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Spanish Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

French Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside Front Cover

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside Back Cover

IMPORTANT: To comply with federal law governing A/C system service, you must complete and

mail the MVAC Certification Form included in the accessory kit. Technicians using this equipment

must be certified under EPA Section 609 (Environmental Protection Agency). For more information,

read the MACS information included in the accessory kit, or visit the MACS website at www.macsw.org.

To validate the warranty provided by SPX Robinair, complete the warranty card included in the

accessory kit, and mail it within ten days from the purchase date of the unit.

Introduction

Robinair No. 34788 is used on R-134a vehicles and is designed to be compatible with existing service

equipment and standard service procedures. Model No. 34788 is a UL-listed, single-pass system that

meets SAE specifications for recycled refrigerant. Follow the SAE-J2211 recommended service

procedure for the containment of R-134a.

The unit includes a 3 cfm (85 l/m) Robinair high vacuum pump for fast, thorough evacuation. The

compressor pulls the A/C system to 0 psig, then works in series with the vacuum pump to achieve highly

efficient recovery and immediate recharge. If the system is not opened for service, there is no need to pull

additional vacuum. If the system is opened for service, use the unit’s vacuum cycle to remove air and

moisture from the A/C system. (We recommend a minimum 15-minute vacuum, or follow the vehicle

manufacturer’s specs.) Note: R-134a systems require special oils. Refer to the A/C system manufacturer’s

service manual for oil specifications.

Technical Specifications

Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 115V, 60 Hz

Operating Range . . . . 50° to 120° F (11° to 49° C)

Filter-Drier . . . . . . . . . . . . . . .43 cu. in. spin-on type

Pump Free-Air Displacement

. . . . . 3 cfm (85 l/m)

Dimensions . . . . . . . . . . . . . 49" H x 34" W x 23" D

. . . . . . . . . . . . . . . . . (124.5 cm x 86.4 cm x 58.4 cm)

Digital Display: visual

interface between operator

and machine.

Main Power Switch: supplies

electrical power to unit.

Manifold Gauges:

connect to vehicle A/C

system; show system’s

low-side and high-side

pressure.

Flow Indicators: red light indicates

high-side flow from vehicle A/C system

through unit; blue light indicates low-

side flow from vehicle A/C system

through unit.

Control Panel:

folds flat for storage.

Database Expansion Slot: an

optional vehicle database will

supply information regarding

charge capacity by vehicle model.

Tool Storage Areas

(additional storage

on back side for

extra filter-driers and

oil bottles).

539602 Rev. B, September 20, 2007

Introduction

Keypad Functions

START

YES START / YES begins or resumes a

function, or answers a query.

STOP / NO terminates or pauses a

function, or answers a query.

MENU displays the selection menu.

ARROWS are used for scrolling

through menu items.

AUTOMATIC activates a menu that

helps the user set up an automatic recover

/ vacuum / leak test / charge sequence.

RECOVER activates the recovery

sequence.

VACUUM activates the vacuum

sequence, followed by an option to

activate a leak test.

INJECT OIL injects oil into the vehicle

A/C system.

CHARGE charges the vehicle A/C

system with a programmed amount of

refrigerant.

REFRIGERANT DATABASE (optional)

offers access to system oil and refrigerant

specifications by vehicle model and year.

Purchase Robinair part no. 34411.

RECOVER

STOP

VACUUM

CHARGE

INJECT OIL

AUTOMATIC

Keypad

Glossary

A/C System : The vehicle air conditioning system being serviced.

Internal Storage Vessel : The refillable refrigerant storage vessel

designed specifically for this unit; 30 lb. (14 kg).

Source Tank : A disposable tank of new refrigerant used to refill

the internal storage vessel; not included.

Unit : Model No. 34788.

REFRIGERANT

DATABASE

When the unit is not performing a function,

pressing the UP or DOWN arrow key

adjusts contrast on the digital display.

Menu Functions

1. Press the MENU button on the keypad.

2. Press the UP or DOWN arrow key to scroll

through the menu choices shown on the second

line of the display :

SELECT LANGUAGE

SERVICE MENU

CALIBRATION CHECK

ADJUST TANK FILL LVL

MANUAL REFILL

REFRIG MANAGEMENT

MAINTAIN FILTER

MAINTAIN VACUUM OIL

SELECT UNITS

VERSION X.XX

3. Press START / YES to make a choice from

the menu. Press STOP / NO to pause during

any process, and STOP / NO a second time to

exit a process.

Introduction

Menu Choice: Select Language

Operator may choose to have prompts displayed in one of

three languages: English, Spanish, or French.

Menu Choice: Service Menu

For Robinair service center use only.

Menu Choice: Calibration Check

Use to verify internal scale calibration. Refer to instructions

in Maintenance section under Scale Calibration Check.

Menu Choice: Adjust Tank Fill Lvl

When connected to a refrigerant source, the unit maintains

a pre-set amount of refrigerant in the internal storage vessel

(default is 15 lbs.). This value may be adjusted up or down

to suit the user’s needs. Refer to instructions outlined in the

Maintenance section under Adjust Tank Fill Level.

Menu Choice: Manual Refill

Use to transfer refrigerant from the source tank to the

internal storage vessel (ISV). Refer to instructions outlined

in the Maintenance section under Manually Fill the ISV.

Menu Choice: Refrig Management

Displays the amount of refrigerant recovered, charged,

and replenished (for the life of the unit), and filtered

(since the last filter change).

Menu Choice: Maintain Filter

The filter-drier removes acid, particulates, and moisture

from the refrigerant. To meet SAE J-2788 requirements,

it is mandatory to replace the filter-drier after 150 lbs.

(68 kg) of refrigerant has been filtered. This menu item

shows how much refrigerant has been filtered since the

last filter change, and allows the user to reset the value

once a filter change is complete. A code, which appears on

the filter, must be entered into the unit to ensure compliance

with SAE J-2788. Refer to the instructions outlined in the

Maintenance section under Replace the Filter-Drier.

Menu Choice: Maintain Vacuum Oil

For maximum vacuum pump performance, change

vacuum pump oil after every 10 hours of operation. This

menu item displays how long the vacuum pump has

operated since the last oil change, and allows the user to

reset the value once an oil change is complete. Refer to

the instructions outlined in the Maintenance section

under Change Vacuum Pump Oil.

Menu Choice: Select Units

The operator may choose to have test results displayed in

Imperial (lb.), Imperial (lb. and oz.), or Metric (kg).

Menu Choice: Version X.XX

Displays the revision level of the software in the unit.

Arrow

Keys

Start / Yes

Button Stop / No

Button

539602 Rev. B, September 20, 2007

Setup

Unpack the Accessory Kit

Unpack the accessory kit from the bag, and remove the

plastic packaging. The kit consists of

•A calibration weight.

•Vacuum pump oil, oil filler cap, and tube.

•Plastic pouch containing a warranty card (to be

completed and mailed), applicable MSDS sheets, a

service center listing, and an envelope of Mobile Air

Conditioning Society (MACS) information.

Important: You must complete and mail the

MVAC Certification Form and your technicians

must be certified with the Environmental

Protection Agency (EPA) to operate this

equipment.

Power Up the Unit

1. Unwind the power cord from the handle, and plug it

into a correct voltage outlet. See Figure 1.

2. Turn on the main power switch. The first time the

unit is powered up, it displays the initial setup mode.

Select a Language – English

Seleccionar Idioma – Espanol

Selection Langue – Francais

The operator may choose to have prompts displayed in

one of three languages: English, Spanish, or French.

Use the UP or DOWN arrow key to toggle through

the choices for English, Spanish, or French. Refer to

Figure 2.

Press START / YES to select the displayed language.

Select Operating Units

The operator may choose to have test results displayed

in Imperial (lb., or lb. and oz.) or Metric (kg) units.

1. Use the UP or DOWN arrow key to toggle through

choices for IMPERIAL UNITS or METRIC UNITS.

2. Press START / YES to select the displayed

operating unit choice.

IMPORTANT :

R-134a systems have

special fittings (per SAE specifications)

to avoid cross-contamination with R-12

systems. DO NOT adapt your unit for a

different refrigerant — system failure

will result.

Arrow

Keys

Start / Yes

Button

Figure 2

Stop / No

Button

Power

Cord

Main

Power Switch

Figure 1

Set Tank Fill Level

The operator may either accept the unit’s pre-set default

weight of 15 lbs. (6.8 kg) of refrigerant stored in the

internal storage vessel (ISV), or change the amount to

accommodate the application.

The unit displays

LEVEL: 15.00 LBS.

ENTER TANK FILL LVL

LIMIT: 4 TO 20 LBS.

PRESS START / YES TO SAVE

1. Press START / YES to accept the default amount,

or use the keypad to enter a desired amount and

press START / YES.

Add Oil to the Vacuum Pump

IMPORTANT: The vacuum pump is shipped

without oil in the reservoir. Failure to add oil to

the vacuum pump will damage the pump.

The unit displays

ADD 5 OZ OF NEW OIL

TO VACUUM PUMP

START TO CONTINUE

1. Remove the brass plug from the vacuum pump oil

fill port. See Figure 3.

Attach the flexible tube/cap to the oil bottle; pour

only five (5) ounces of vacuum pump oil into the fill

port. Note: You will top off the oil in the next step as

the vacuum pump is running.

3. Press and release the START / YES key. While the

vacuum pump is running, slowly add oil until the

level rises to the center of the reservoir’s sight glass.

4. Press the STOP / NO key to stop the vacuum pump,

and install the brass plug in the fill port.

5. Press START / YES to continue.

Setup

Figure 3

Sight

Glass

Fill Port

Vacuum Pump

Sight Glass

CAUTION: The unit is programmed

to run the setup procedure as outlined

here. To prevent personal injury, do

NOT operate the unit at any other time

without the brass plug installed,

because the vacuum pump is

pressurized during normal operation

Fill Port

539602 Rev. B, September 20, 2007

Setup

Fill the Internal Storage Vessel (ISV)

Press START / YES, and the unit automatically

runs a 5-minute vacuum to clear all internal air.

Note: The “burping” noise heard during this

process indicates air is being purged from the

system—this is normal.

2. After the vacuum pump shuts off, connect the

fill hose to the liquid connector on a full

source tank.

3. Open the source tank valve.

4. Install the source tank, and secure it to the

unit (using the tank strap) in such a way that

liquid refrigerant is supplied to the

connection.

5. Press START / YES to begin filling the

internal storage vessel. Add at least 8 lbs.

(3.6 kg) of refrigerant to ensure enough

refrigerant is available for charging.

This process takes 15–20 minutes. The unit

stops when a sufficient amount of refrigerant

has been transferred to the internal tank, or

when the source tank is empty.

Press STOP / NO to pause. Press STOP /

NO again to exit, or START / YES to

resume.

6. When the fill process is complete, press

STOP / NO to exit. The unit is ready for

operation.

Note: There is no need to calibrate the scale; it

is calibrated at the factory.

Figure 4

Side View

Fill Hose

(connect to

liquid line)

Power

Cord

Source

Tank

Strap

Low- and

High-Side

Hoses

Notes

539602 Rev. B, September 20, 2007

Operating Instructions

Recover Refrigerant from a Vehicle

1. Empty the oil drain bottle located on the right-hand

side of the unit, if necessary, or make note of the

current oil level. See Figure 5.

2. Connect the high- and low-side hoses to the vehicle

A/C system.

3. Open the coupler valves on the hoses.

4. Press the RECOVER button.

Note: The clicking noise heard during the recovery

process indicates the solenoid is opening and closing —

this is normal.

5. When the system has recovered to 0 psi, the vacuum

pump starts and runs until recovery is complete. The

unit then goes into an automatic oil drain—this may

require 90 seconds to complete.

6. After the oil drain is complete, the display shows

RECOVER COMPLETE

RECOVERED XX.XX LBS. (X.XX KG)

CHECK OIL BOTTLE

Note: The displayed recovered weight can vary,

depending on ambient conditions, and should not be

used as an indicator of scale accuracy.

7. Check the oil drain bottle, and note the amount of oil

that was removed from the A/C system. This is the

amount of new oil that must be charged into the A/C

system after evacuation is complete.

Dispose of used oil according to local, state, and

federal regulations.

Recovery is complete. You are now ready to either

advance to the charge process, or to make repairs to the

A/C system followed by the evacuation process.

Oil Drain

Bottle

Figure 5

Operating Tips

After the RECOVER function is selected :

•If system pressure is below 10 psi, the display

readsLOW RECOVER PRESSURE

CHECK CONNECTIONS

until pressure increases, or the START / YES

button is pressed. Verify the high- and low-side

hoses are connected and coupler valves are

open. Press STOP / NO to exit.

•If 100 lbs. (45 kg) or more of refrigerant has

been recovered since the last filter-drier change,

the display reads

FILTER WEIGHT XXX LB (XX KG)

To meet SAE J-2788 requirements, it is

mandatory to replace the filter-drier after

150 lbs. (68 kg) of refrigerant has been

filtered. The unit gives a warning to replace the

filter when filter weight reaches 100 lbs.; when

filter weight reaches 150 lbs., the unit locks

out and ceases to operate. Refer to

instructions outlined in the Maintenance section

under Replace the Filter-Drier.

•

If the unit has refrigerant in its low-side plumbing,

it begins a clearing process and displays

RECOVER IN PROGRESS

CLEARING

If you wish to skip the clearing operation,

or stop the clearing prematurely, press

START / YES.

Evacuate the A/C System

1. Ensure service hoses are connected, and coupler

valves are OPEN.

2. Press VACUUM.

Press START / YES to accept the default evacuation

time of 10 minutes, or enter the desired vacuum time

using the number keys, and press START / YES.

IMPORTANT: The unit pulls a vacuum on the

vehicle A/C system to remove air and boil off

moisture that may be present in the system.

Evacuate the system for at least 10 minutes,

or follow the A/C system manufacturer’s

specifications, to ensure adequate moisture

and contaminant removal.

4. The unit gives you the option of doing a leak test

after evacuation.

Press START / YES to perform the leak test.

Press STOP / NO to skip the leak test and begin

evacuation.

5. The unit evacuates the A/C system and stops when

the specified amount of time has elapsed.

Press STOP / NO to pause the process. Press

START / YES to resume, or STOP / NO again

to exit.

You are now ready to replenish the A/C system with

new oil, if necessary, or to recharge the system with

refrigerant.

Operating Instructions

Operating Tips

•If the vacuum pump has run for 10 or more

hours without an oil change, the unit displays

VACUUM OIL TIME XX:XX

CHANGE OIL NOW?

Refer to instructions outlined in the

Maintenance section under Change Vacuum

Pump Oil.

•Before the unit begins evacuating the A/C

system, it checks for any pressure in the

system that might damage the vacuum pump.

If pressure is detected, the unit displays

PRESSURE EXISTS

PRESS ANY KEY TO EXIT

Press any key to exit, and recover refrigerant

before proceeding.

•If a leak test was selected at the end of

vacuum, and a leak is detected, the unit

displays

LEAK TEST FAILED

PRESS ANY KEY TO EXIT

Press any key to exit the evacuation, perform

needed repairs, and repeat the evacuation.

•To ensure an accurate leak test, it is

imperative that a thorough recovery and

evacuation of the system be performed.

During the recovery process, cold spots can

develop in the automotive system. Pockets of

refrigerant in desiccant and in system oil will

continue to vaporize as the A/C system

temperature equalizes toward ambient. As

this occurs, A/C system pressure will

increase, which may be interpreted by the

unit as a leak.

This will vary somewhat with ambient

temperature conditions.

539602 Rev. B, September 20, 2007

Replenish A/C System Oil

Oil may be replenished through the high side after the

vacuum function, or with an oil inject tool after

charging the vehicle.

IMPORTANT : To prevent damage to

equipment, charge only the amount of oil that

was removed from the A/C system during the

recovery process. If no oil was removed from

the A/C system during recovery, DO NOT

charge any oil into the A/C system.

Empty the oil drain bottle before recovering an A/C

system to prevent an inaccurate oil charge.

1. Refer to the vehicle service manual, or the optional

vehicle reference database card, to determine the

correct oil for the A/C system being serviced.

2. Check the oil drain bottle to determine the amount of

oil that was removed. See Figure 6.

3. Adjust the o-ring around the oil injector bottle to the

required oil charge level.

For example, if the bottle’s oil level is at 4 ounces,

and you need 1/2 ounce of oil to replenish the A/C

system, place the o-ring at the 3-1/2 ounce level.

4. Attach the oil injector bottle to the unit.

5. Press the INJECT OIL button. The unit looks for

pressure in the hoses, and temporarily displays

EQUALIZING PRESSURE.

When prompted, press and hold the INJECT OIL

button until the oil level in the oil injector bottle

reaches the o-ring.

7. Press STOP / NO after the oil inject is complete to

recharge the system with refrigerant. The display

will prompt into the charge mode. (Charge mode

after injecting oil will allow only a high-side charge.)

Note: You must recharge the A/C system with

refrigerant at this time to ensure all the oil is delivered.

Operating Instructions

Figure 6

Oil Injector

Bottle

Oil Drain Bottle

O-ring

Recharge the A/C System

Press CHARGE. Press CHARGE again to toggle

between a high-side charge, a low-side charge, or both.

Note:

•Charge mode after injecting oil will allow only a

high-side charge.

•

The blue light on the control panel indicates a low-

side charge; the red light indicates a high-side charge.

See Figure 7.

2. Accept the default weight by pressing START /

YES, or type in a weight using the number keys, and

press START / YES.

3. Select START / YES to perform an oil inject; select

STOP / NO to skip the oil inject.

After a valid charge weight is entered, the display reads

CHARGE IN PROGRESS / DO NOT DISTURB

X.XX LBS. (X.XX KG)

Moving or bumping the unit at this point may result

in an incorrect reading.

Note:

•During a charge cycle, if the unit fails to transfer

refrigerant due to low tank pressure, the charge

process is automatically interrupted and the unit

operates in a mode to build tank pressure. Once tank

pressure is sufficient, the unit automatically

completes the charge.

•When the charge cycle gets close to the weight

entered in Step 2, the unit slows down. It’ll charge,

settle, charge again, settle, etc., with the blue/red

lights illuminating accordingly.

5. When the charge is complete, the display reads

CHARGED XXX LBS (KG)

PRESS START TO EQUALIZE HOSES

The user must equalize pressure in the service hoses

to ensure all liquid refrigerant trapped in the hoses is

transferred to the vehicle A/C system for an accurate

charge. Press START / YES to equalize hoses.

Operating Instructions

Operating Tips

After selecting the CHARGE function and

entering a desired weight, if the weight entered

will leave less than 3 lbs. (1.36 kg) of

refrigerant in the internal tank after charge, the

charge function will not start. The display reads

INSUFFICIENT REFRIG.

PRESS ANY KEY TO EXIT

Refer to the Maintenance section of this manual

for instructions to Manually Refill the Internal

Storage Vessel (ISV).

Red Light indicates

High-Side Charge

Blue Light indicates

Low-Side Charge

Figure 7

539602 Rev. B, September 20, 2007

Operating Instructions

Recharge the A/C System contd.

6. Close the high-side coupler valve. The display reads

DISCONNECT HS HOSE

AND START A/C MAX

START TO CONTINUE

The high-side hose may be removed from the vehicle,

but the low-side hose must stay connected to

the vehicle with the low-side coupler open.

7. Place the vehicle gear selector in park or neutral,

with the emergency brake ON.

Start the vehicle. The A/C system should be set at

maximum.

9. Press START / YES. The display reads

EQUALIZING HOSES

PLEASE WAIT

The unit internally connects the low- and high-side

hoses, allowing the vehicle’s compressor to pull

refrigerant into the A/C system. When the charge is

complete, the display shows

DISCONNECT LOW SIDE HOSE

START TO CONTINUE

Close the low-side coupler valve. Remove the service

hoses from the A/C system.

IMPORTANT: If the low-side or high-side

coupler valves are left open, the system will

pull the refrigerant back out of the vehicle.

11.

Shut OFF the vehicle.

12.

Press

START / YES to begin clearing the hoses.

CLEARING HOSES

PLEASE WAIT

When the hoses are cleared, the display reads

CHARGE COMPLETE

CHARGED XX.XX LBS

ANY KEY EXITS

The A/C system is now ready for use.

WARNING: To prevent personal injury,

•

Verify the vehicle is in park or neutral

with the emergency brake ON before

starting the engine.

•

Never run a vehicle without adequate

ventilation in the work area.

Operating Instructions – Automatic

The automatic function allows a user to program an

automatic recovery, vacuum, leak test, and / or charge

sequence. The user may choose to skip any step in the

automatic operation during the programming. A total

automatic sequence may take an hour to complete.

Note: Oil recovered during the recovery cycle can be

injected by the user before the charge cycle, or can be

manually injected into the vehicle after charge using a

separate oil injection tool.

Connect the high- and low-side service hoses to the

A/C system, and open the coupler valves on the hoses.

2. Press the AUTOMATIC button. See Figure 8.

3. The unit asks if a recovery is needed. Press STOP /

NO to skip the recovery cycle; press START / YES

to accept.

The unit asks if a leak test is needed. Press STOP / NO

to skip the leak test; press START / YES to accept.

5. The unit asks if a charge is needed. Press STOP /

NO to skip the charge cycle; press START / YES to

accept. Press CHARGE to toggle between high- or

low-side charge, or both.

Accept the default weight by pressing START /

YES, or type in a desired weight using the number

keys and press START / YES.

6. The display shows an overview of all the tests that

were selected. Press START / YES to begin the

automatic sequence.

Note : If a high-side charge has been selected, before

charging, the automatic sequence will pause and

“beep” for 30 seconds to allow the user to inject oil, if

desired. See Replenish the A/C System Oil instructions

in this manual.

When the sequence is complete, the display shows the

amount of refrigerant that was recovered and charged.

8. Close the high- and low-side coupler valves, and

remove the service hoses from the A/C system.

If any oil was recovered during the recovery cycle,

and oil was not injected before the charge cycle, use

an oil injection tool at this time to manually inject oil

into the A/C system.

Operating Tips

•

If the weight entered is more than the refrigerant

available in the internal tank, the charge function

will not start. The display reads

INSUFFICIENT REFRIG.

PRESS ANY KEY TO EXIT

Refer to the Maintenance section of this manual for

instructions to Manually Fill the ISV.

•

If problems are encountered during the automatic

sequence, the unit will “beep” three times and the

control panel readout will pinpoint the problem

encountered. The sequence remains paused until the

user enters a decision regarding how to proceed.

•

Before the unit begins evacuating the A/C system

during the automatic sequence, it checks for any

pressure in the system that may damage the vacuum

pump. If pressure is detected, the unit displays

PRESSURE EXISTS

PRESS ANY KEY TO EXIT

Press any key to exit the automatic sequence.

•If a leak test was programmed, and a leak is

detected, the unit displays

LEAK TEST FAILED

PRESS STOP TO EXIT

PRESS START TO CONTINUE

Press STOP to exit the automatic sequence and

perform needed repairs. Press START to continue

the automatic sequence despite the failed leak test.

•To ensure an accurate leak test, it is imperative

that a thorough recovery and evacuation of the

system is performed. During the recovery process,

cold spots can develop in the automotive system.

Pockets of refrigerant in desiccant and in system

oil will continue to vaporize as the A/C system

temperature equalizes toward ambient. As this

occurs, A/C system pressure increases, which may

be interpreted by the unit as a leak. This varies

somewhat with ambient temperature conditions.

Automatic

Function

Figure 8

539602 Rev. B, September 20, 2007

Maintenance

General Maintenance

1. On a regular basis, wipe off the unit using a clean

cloth to remove grease and dirt.

Periodically check internal components for leaks; over

time, fittings can loosen as the unit is moved. Open the

door panel, and trace lines using a leak detector.

Check connections on the back of the unit. Tighten

any loose fittings or connections you may find.

Electrical Protection

The unit is equipped with a 15 amp circuit breaker on

the back panel. See Figure 9. If the breaker trips, its

button will pop out. A tripped circuit breaker will cause

the unit to lose all power.

Press the circuit breaker button to reset.

Manually Fill the

Internal Storage Vessel (ISV)

This menu item is used to transfer refrigerant from a

source tank to the internal storage vessel.

Note: If a refrigerant source tank remains connected to

the unit during normal operation, the correct amount of

refrigerant will automatically be maintained in the ISV.

The ISV may be manually refilled, if necessary.

1. Press Menu, and use arrow keys to select MANUAL

REFILL. Press START / YES. The unit displays

CONNECT SOURCE TANK

START TO BEGIN

2. Connect the fill hose to a full source tank, and open

the source tank valve.

3. Install the source tank, and secure it to the unit with

the source tank strap in such a way that liquid

refrigerant is supplied to the connection.

4. Press START / YES to begin. The display shows

TANK FILL IN PROGRESS

TRANSFER XX LBS

5. The unit automatically stops when the preset tank fill

level is reached, or press STOP / NO to exit. Figure 10

Side View

Fill Hose

Power

Cord

Source

Tank

Strap

Low- and

High-Side

Hoses

Circuit

Breaker

Figure 9

Back View

Replace the Filter-Drier

The filter-drier is designed to trap acid and particulates,

and to remove water from refrigerant. To meet the

SAE J-2788 mandate for adequate moisture and

contaminant removal, the filter-drier must be replaced

after 150 lbs. (68 kg) of refrigerant has been filtered.

Therefore, you no longer have a choice—the

filter-drier must be replaced. The unit gives a

warning when 100 lbs. of the filter capacity has been

used; the unit locks down when the 150 lb. filter

capacity has been reached and will no longer

function. For this reason, always have a spare Robinair

No. 34724 filter-drier on hand.

Check Remaining Filter Capacity

1. Press MENU.

2. Use the arrow keys to scroll through the menu to

MAINTAIN FILTER, and press START / YES.

The unit displays

XXX LBS FILTERED

RECOVER LOCKOUT IN XXX LBS

REPLACE FILTER NOW?

PRESS STOP TO EXIT

3. Press STOP / NO to exit.

Change the Filter

1. Press MENU.

2. Use the arrow keys to scroll through the menu to

MAINTAIN FILTER, and press START / YES.

The unit displays

XXX LBS FILTERED

RECOVER LOCKOUT IN XXX LBS

REPLACE FILTER NOW?

PRESS STOP TO EXIT

3. Press START / YES to proceed.

4. If there is pressure in the filter, the unit begins a

clearing process. When complete, the display reads

ENTER 10 DIGIT SERIAL NUMBER. Use the

keypad to enter the serial number that appears on the

new filter-drier, and press START / YES.

Maintenance

IMPORTANT: Use only authentic Robinair

No. 34724 filter-driers in this machine.

All performance tests and claims are

based on using this specific filter-drier.

And only the Robinair No. 34724 filter-

drier includes the code necessary to

make the unit operable again.

Enter the Serial No. for a New Filter-Drier

The numerical keys on the keypad include an

alphabet that is used to enter the serial number

code for the new filter-drier. The procedure is

similar to text messaging. For example,

To enter an “A”:

Press the 2 key once to

see the “2” on the

digital display; press

the 2 key again to

display the “A”.

To enter a “C”:

Press the 2 key once to

see the “2” on the

digital display; press

the 2 key three more

times to see the “C” on

the display.

After the appropriate letter is shown on the

display, pause for a moment until the cursor

moves to the next position.

Operating Tips

539602 Rev. B, September 20, 2007

5. The display reads PLEASE REPLACE FILTER.

Open the rear door of the unit and unscrew the old

filter. See Figure 11.

Look at the new filter—verify both o-rings are

lubricated and correctly located in the grooves. See

Figure 12. Thread the new filter into place. Press

START / YES.

Note: If the display shows SERIAL NUMBER ERROR,

the serial number is invalid or the filter-drier has

already been used in this unit.

7. Close the door. Press STOP / NO to exit. The filter-

drier replacement is now complete.

Replace the Filter-Drier contd.

Maintenance

Filter-

Drier

Rear View

(without shroud)

Adjust Tank Fill Level

When connected to a refrigerant source, the unit

maintains a default value of 15 lbs. of refrigerant in the

internal storage vessel. This value may be adjusted up

or down to suit the application.

1. Press MENU.

2. Use the arrow keys to scroll through the menu to

ADJUST TANK FILL LVL, and press START /

YES. The unit displays

LEVEL: 15.00 LBS.

ENTER TANK FILL LVL

LIMIT: 4 TO 20 LBS.

PRESS START / YES TO SAVE

3. Use the keypad to enter a value between 4 lbs. and

20 lbs., and press START / YES.

Figure 11

O-rings

Figure 12

Change Vacuum Pump Oil

For maximum vacuum pump performance, change the

vacuum pump oil after every 10 hours of operation. (The

unit will display a prompt after 10 hours of operation.)

1. Press MENU. Use the arrow keys to select

MAINTAIN VACUUM OIL, and press START /

YES. The display shows how long the vacuum pump

has operated since the last oil change:

PUMP OIL TIME X:XX

TIME REMAINING X:XX

CHANGE OIL?

2. Press START / YES. The display shows VACUUM

OIL CHANGE TIME 2:00, and counts down to zero.

Allow the vacuum pump to run until it automatically

stops. The display then shows DRAIN OLD OIL

AND ADD 5 OZ NEW OIL.

3. Refer to Figure 13, and remove the brass plug from

the vacuum pump’s oil fill port. (The pump drains

faster when vented.)

Remove the oil drain fitting cap, and drain the oil into

a suitable container for disposal. Replace the cap.

Attach the flexible tube and cap to the oil bottle; pour

five (5) ounces of vacuum pump oil into the fill port.

6. Press START / YES. The display shows FILL

PUMP TO CENTER OF SIGHT GLASS, and the

vacuum pump starts. While the vacuum pump is

running, slowly add oil until the level rises to the

center of the reservoir’s sight glass.

7. Press STOP / NO. The counter resets to zero after a

vacuum pump oil change has been completed.

8. Replace the brass plug on the fill port. Press STOP /

NO to exit to the Main Menu.

CAUTION: To prevent personal injury, do

NOT operate the unit at any time without the

brass plug installed, because the vacuum

pump is pressurized during normal operation.

Review the laws in your jurisdiction to

determine the correct disposal

procedure for pump oil. It is the

responsibility of the user to determine

if a material is a hazardous waste at

the time of disposal. Ensure you are in

compliance with all applicable laws

and regulations.

Oil Drain Fitting

Oil Fill Port

Sight Glass

Maintenance

Figure 13

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Modèle: RAC34788

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