Robinair Mod 10324

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OperatingManual

Automatic A/C Charging Station

For Refrigerant R-134a Systems Only!


2/16

This equipment is intended for professional use only. The service technician should be familiarwith proper servicing of air conditioning systems as well as the dangers and use of refrigerants and

pressurized components before using the equipment.

WARNING Always wear safety goggles when working with refrigerants. Contact with refrigerants can causeinjury.

Connecting hoses to the wrong ports may cause personal injury or may damage the equip-

ment. Check the operating manual for your air conditioning system for the correct hookup.

Disconnect hoses with extreme caution! All hoses may contain liquid refrigerant under pressure.Contact with refrigerant can cause injury. Wear proper, personal protective equipment, including safety

goggles. Point the disconnected end of a hose away from you and anyone who is nearby.

Use only with refrigerant type R-134a! Cross-contamination with other refrigerant types will causesevere damage to the A/C system and to service tools and equipment. Do not mix refrigerant types

through a system or in the same container!

Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, noseand throat. To remove R-134a from the A/C system, use service equipment certified to meet therequirements of SAE J2210 (R-134a recycling equipment). If accidental system discharge occurs,

ventilate work area before resuming service.

HFC-134a service equipment or vehicle A/C systems should not be pressure tested or leak tested with compressed air. Some mixtures of air/HFC-134a have been shown to be combustible atelevated pressures. These mixtures are potentially dangerous and may result in fire or explosion

causing injury or property damage. Additional health and safety information may be obtained from

refrigerant and lubricant manufacturers.

Improper use or connections may cause electrical shock hazards. Read and follow these

instructions carefully and take all necessary precautions to avoid electrical shock hazards. Before

energizing circuits, be sure that all associated devices are properly grounded. Unplug the station from

the power source before removing the control box.

Safety Precautions

!!

Limited Warranty

This product is warranted to be free from

defects in workmanship, materials, and compo-

nents for a period of one year from date of

purchase. All parts and service center labor

required to repair defective products coveredunder the warranty will be at no charge. The

following restrictions apply:

1. The limited warranty applies to the original

purchaser only.

2. The warranty applies to the product in

normal usage situations only, as described

in the Operating Manual. The product

must also be serviced and maintained as

specified.

3. If the product fails, it will be repaired or

replaced at the option of the manufacturer.

4. Transportation charges for warranty service

will be reimbursed by the factory uponverification of the warranty claim and

submission of a freight bill for normal

ground service. Approval from Robinair

must be obtained prior to shipping to either

an authorized service center or the factory.

5. Warranty service claims are subject to

factory inspection for product defect(s).

6. Robinair shall not be responsible for any

additional costs associated with a product

failure including, but not limited to, loss of

work time, loss of refrigerant, and non-

authorized shipping and/or labor charges.7. All warranty service claims must be made

within the specified warranty period. Proof-

of-purchase date must be supplied to the

manufacturer.

8. Use of Robinair charging equipment with

non-authorized refrigerants will void our

warranty. Authorized refrigerants are listed

on the equipment or are available through

our Technical Service Department.

This Limited Warranty does not apply if:

• The product, or product part, is broken by

accident.

• The product is misused, tampered with, or

modified.

• The product is used for recharging any

substance other than the specified refriger-

ant type.


3/161R-134a Smart Cart ® Automatic A/C Charging Station

In troduction ................................................................................................................... 2

Set U p Inst ructions ....................................................................................................... 2

P repar ing the Vacuum P ump .................................................................................. 2

Di agram of Vacuum Pump Components ................................................................. 2

Inst a lling a Refrigera nt Ta nk .................................................................................. 3

Di agram of Disposable Tan k I nstal lat i on ............................................................... 3

Di agram of Refi l lable Tan k In stal l at ion ................................................................. 4

Removing an E mpty Ta nk ........................................................................................ 4

U sing the Hea ter B la nket ........................................................................................ 4

Operat ing Procedures ................................................................................................... 5

Summar y Char t of Operat in g Procedur es ............................................................... 5

To Att a ch Hoses to the S ystem ................................................................................ 5

To Dia gnose Sy stem P roblems ................................................................................. 5

To Add Refrigera nt to P ar tia lly Ch ar ged S ystems .. . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. 5

To Recover Refrigera nt ............................................................................................. 6

To P rogram Vacuum/Ch ar ging C ycle ...................................................................... 6

To Use Automa tic Vacuum /Ch a rging Cycle ............................................................ 6

To Check Fina l Syst em Opera tion ........................................................................... 7To Disconnect t he Sy stem ........................................................................................ 7

Ma intena nce Inst ructions ............................................................................................. 7

St oring the Sta tion .................................................................................................... 7

Ma inta ining th e Vacuum P ump ............................................................................... 7

Checking the Sca le Accura cy ................................................................................... 7

Ca libra ting the Sca le ................................................................................................ 8

U sing Ma nua l Dia gnostics ....................................................................................... 8

Additional Operat ing G uidelines ................................................................................. 9

How to U se the Cont rols ........................................................................................... 9

Di agram of Contr ol Components ............................................................................. 9

U sing t he K eypad ...................................................................................................... 10

Di agram of K eypad ................................................................................................... 10

U sing th e Displa y P a nel ........................................................................................... 10

Qu i ck Refer ence Cha r t .............................................................................................. 11

Di agram of Di splay Panel ........................................................................................ 11

Replacement P a rt s List ................................................................................................. 12

Troubleshooting Tips ..................................................................................................... 13

Temperat ure/P ressure Relation Cha rt ........................................................................ 14

Conversion Cha rt .......................................................................................................... 14

Table of Contents

U.S. Patent Nos.: 4,523,897; 5,005,375; 4,688,388 RE: 33,212

Other U.S. and Foreign Patents Pending

A/C Air conditioning

System The A/C sy st em bein g ser viced

Tank The refrigera nt supply t an k

Station The a utoma tic A/C cha rging sta tion

Glossary of Terms


4/162 © 1991 Robinair Division, SPX Corporation

This a utoma tic A/C cha rging st a tion is

designed with you in mind. It is a ccura te,

easy t o program , a nd simple to use.

Be for e us i n g the sta t i on , r ead and

unders tand a l l ins truct ions a nd w arnings

in this operating manual.

The 220V 50Hz m odels ha ve some

operating exceptions, which are noted inthis operating manual.

Introduction In a ddition, all measurements are metrican d the ma nifold is equipped with kP a/

bar ga uges showing tempera ture in

degrees Celsius.

B efore opera ting th e 220V 50Hz m odel,

plug the short pow er cord from t he upper

contr ol box into th e outlet on the lower

power box. Plug the main power cordinto a 220V 50Hz power source tha t is

free of transients and electrical noise.

To set up th e sta tion for opera tion, you

need to prepare the va cuum pump and

install the refrigerant tank.

PREPARING THE VACUUM PUMP

The Va cuMast er® vacuum pump is

shipped with out oil in the reservoir.

Be for e sta r t i ng th e sta t i on , you m us t

f i l l t h e p um p w i t h o i l a n d r emo ve t h e

exhau st p l ug f r om the end o f t he

pum p ’ s han d l e.

Note: The Iso-ValveTM isolation va lve on

th e side of the pump mus t remain open

(the position shown in the illustration)

for t he sta tion to opera te.

CAUTION! D o no t at tempt to run thevacuum pump when the ma nifold gauge

set shows pressure rea dings a bove 5 psi.

In the vacuum mode, positive pressure

will:• High pressure — not a l low the

vacuum solenoids t o open.

• Low pressure — blow oil out of the

pump handle when the va cuum

solenoids do open.

Running t he vacuum pump with posit ive

pressure locks high pressure between the

tw o solenoids a nd prevents operat ion of

the pump.

Follow th ese procedures to prepare t hevacuum pump for use with t he cha rging

sta t ion.

1. Remove an d discar d the exhaust plug

from the end of the pump’s handle.

2. Remove and reta in the black plug on

the oil fill port.

3. P our vacuum pump oil into the oil fill

port until oil appear s in t he sight

glass on th e reservoir. The a pproxi-

ma te oil ca pacity of th e pump is 13

ounces (384 millilit ers).4. Close both t he high side an d low side

valves on t he sta tion’s ma nifold.

Di agram of Vacuum Pump Components

Set Up Instructions

EXHAUST PLUG

OIL FILL PORT

SIGHTGLASS

OILDRAINVALVE

ISO-VALVEˇ



INSTALLING A REFRIGERANT TANK

Follow these steps to insta ll a r efrigerant

tank on the charging station.

WARNING

Always wear safety goggles whenworking with refrigerants. Read and

follow a ll wa rnings at the beginning ofthis ma nua l before operat ing the unit .

Connecting hoses to the wrong portsmay cause personal injury or maydamage the equipment. Read and follow all wa rnings at t he beginning of this

ma nua l before operating the unit .

Use only with refrigerant type R-134a!Cross-conta mina tion w ith other refriger-

an t t ypes will cause severe da ma ge to the

sta tion and t o tools an d equipment.

Do not mix refrigerant types through a

system or in the sa me conta iner!

1. Att ach the sta tion’s yellow charging

hose to a full refrigerant ta nk, as

follows:

• Disposab le ta nks — Connect t he

yellow hose, open the t a nk’s valve,

an d place the inverted tan k (wit h its

valve down) on the scale platform.

B e sure to center th e tan k over the

stud w elding point. U se only ta nks

designed for use w ith R-134a, includ-

ing Acme threa ds on the fit t ings.

5. P lug the sta tion into the proper

voltage outlet , an d tur n on the MAIN

POWER switch.

6. Simulta neously press the ENTER

a nd zero keys on th e keypad to a ccess

the ma nua l diagnostic mode.

7. P ress “1” on the keypad t o star t the

pump.

8. While the pump is running, add

enough va cuum pump oil so tha t t he

oil level is even wit h t he line on t he

reservoir’s sight glass.

9. P ress “1” or the RES ET CYCLE key

on the keypad t o stop th e pump.

10. Replace the black plug on th e oil fill

port .

IMPORTANT! For maximum perfor-ma nce, change th e vacuum pump oil

frequently (approximately after every

four hours of running time). We recom-

mend using our Premium H igh Vacuum

Pump Oil; it is specifically blended to

mainta in ma ximum viscosity a t normal

running t empera tures a nd to improve

cold weather starts (see the “Replace-

ment P ar t s Lis t ”).

Read a nd follow the deta iled instructions

in the Vacu-Master ® Vacuum P ump

Opera ting Ma nua l. You do not need to

return the wa rranty regis tra t ion card

contained in the Vacu-Master ® VacuumPump Operating Manual — return only

the wa rranty regis tra t ion card a t ta ched

to the s ta t ion to va lidate your w arra nty .

Di agram of Di sposable Tan k I nstal lat i on

Set Up Instructions

Bulk Refrigerant Tank(Not Included)

TankValve Handle

Ball

Valve

Yellow Hose ToRefrigerantSolenoid

Dual PurposeHold-Down

Bracket

! !

(Continued)



WARNING

Disconnect hoses with extreme caution!All hoses may contain liquid refrigerantunder pressure. Read a nd follow a llwa rnings a t t he beginning of this manual

before operating the unit.

2. Disconnect th e hose from the tank.

3. Release the retaining stra p buckle.

4. Loosen the wing nut on the hold-

down bra cket a nd remove the empty

ta nk from the platform.

USING THE HEATER BLANKET

A heat er blanket speeds the t ra nsfer of

refrigera nt a nd a ssures a complete

charge by raising the pressure with in the

refr igerant ta nk.

1. Wrap the heater blanket a round the

refrigerant ta nk, secure it wit h theVelcro® s tra p, and plug its power cord

into the heater outlet on the bottom

of the control box (right receptacle).

2. Turn on the MAIN P OWER sw itch

on t he front of the sta tion.

The heater blanket is on whenever the

sta tion’s MAIN P OWER switch is on,

elimina ting t he need for ma nua l control.

You can extend the life of the heater

blanket by unplugging the heat er when

it’s not being used or tu rning off th e

MAIN P OWER switch.

• Re f i l l a b l e ta nks — Leave the tank

upright, at tach the yellow charging

hose to the blue LIQUI D va lve on th e

ta nk, an d open the blue valve.

2. Open th e ball valve on the yellow

char ging h ose (th e open position ru ns

par a llel to the hose).

Note: Use a ma ximum ta nk size of 50pounds (23 kilograms) with this charging

sta t ion.

3. Fas ten the tank securely with the

ta nk hold-down bra cket. P lace the

heater bla nket a round the center of

the ta nk, an d fast en it securely (see

“Using the Heater Blanket”).

4. Secure the reta ining s t rap a round

the tank.

Note: Adjust the stra p so that it comes in

contact w ith the ta nk, b u t i s n ot t i g h t a r ou n d t h e t a n k .

5. I f the tank wa s changed a f ter press-

ing the HOLD key to interrupt the

cycle, press the CONT key or RES ET

CYCLE key, depending on the

operation you require next.

REMOVING AN EMPTY TANK

Follow t hese steps to remove an empt y

refrigerant tank from the charging

sta t ion.

1. If the stat ion is opera ting, press theHOLD key. You do not need to turn

off the MAIN POWER switch.

Di agram of Refi l lable Tank I nstal lat i on

PlatformMountRing

Blue LIQUID Valve

Ball Valve

YellowHose To

RefrigerantSolenoid

BulkRefrigerant

Tank(Not Included)

Set Up Instructions

! !



Operating Procedures

Summar y Char t of Operat in g Procedur es

TO DIAGNOSE SYSTEM PROBLEMS

1. Sta r t the A/C sys tem and w atch the

gauge pressures (refer to the

manufacturer’s specifications for

proper opera ting pressures).

2. P er form any other visual and diag-

nostic inspections recommend ed by

the ma nufacturer .

3. If t he A/C sy stem is operat ing prop-

erly, disconnect t he h ose couplers

from the A/C syst em. To recha rge or

ma ke necessary repairs, see the

appropriate sections that follow.

TO ADD REFRIGERANT TO PARTIALLYCHARGED SYSTEMS

1. In t he progra m mode, press ADD .2

lbs. REF RIG . The messa ges “AU TO-

MATIC” an d “RE FRIG ERANT”

appear on the display.

2. Open t he low side valve. The sta tion

dispenses .2 pounds (.1 kilograms) of

refrigeran t, th en displays t he mes-

sage “CP L.” Close the low side valve.

3. Monitor the A/C syst em opera ting

pressures. Correct a ny low cha rge

indicat ions by pressing RE SE T

CYCLE ; repeat S tep 1 as n ecessary.

N ote: There a re oth er A/C s yst em pr ob-

lems which cause symptoms similar t o a

low refrigerant charge — refer to youroperat or’s ma nua l or a relia ble A/C

troubleshooting cha rt . I f a dding one

pound of refrigerant does not correct the

low charge symptoms, you ma y need to

recover a nd/or recharg e refrigeran t, a s

described next.

B efore opera ting th e 220V 50Hz m odel,

plug th e short power cord from t he upper

cont rol box into th e outlet on th e lower

power box. Plug the main power cord

into a 220V 50Hz power source tha t is

free from transients and electrical noise.

The chart below summarizes the steps in

each of th e following sections.TO ATTACH HOSES TO THE SYSTEM

1. Be sure a l l va lves on the manifold are

closed.

WARNING

Connecting hoses to the wrong portsmay cause personal injury or maydamage the equipment. Check your A/Csystem operat ing ma nua l for the correct

hook-up.

Use only with refrigerant type R-134a!Cross-conta mina tion w ith other refriger-

an t t ypes will cause severe da ma ge to the

sta tion and t o tools an d equipment.

Do not mix refrigerant types through a

system or in the sa me conta iner!

2. Att ach th e red high side hose’s

coupler to t he h igh side of t he A/C

system.

3. Att ach t he blue low side hose’s

coupler to t he low side of t he A/C

system.

N ote: The ma nifold is ported so tha t t hegauges indicate pressure wh ether or not

the valves are open.

! !

SUMMARY

1. Attach hoses to the A/C system.

2. Start the A/C system and compare operating pressures to

manufacturer’s specifications.

3. Add a partial charge, if necessary.

4. Discharge the A/C system, if required.

5. Program the vacuum/recharge cycles.

6. Start the A/C system and perform final operating check.

7. Disconnect the hoses from the A/C system.



TO RECOVER REFRIGERANT

IMPORTANT! U se a recovery unit . Dono t vent refrigera nt t o the at mosphere.

1. B e sure the A/C syst em is turn ed off,

then connect t he yellow hose from

the m a nifold’s center port to your

recovery un it’s inlet port.

2. Open th e manifold’s red high side

valve, blue low side valve, and center

valve, and sta rt t he recovery unit .

Follow the recovery unit’s instruc-

tions to recover refrigerant.

TO PROGRAM VACUUM/ CHARGING CYCLE

Vacuum is programmed in minutes a nd

refrigera nt is programmed by w eight. If

no quant ity for an y particular cat egory is

required, enter zeros.

1. I f the message “PROGRAM” is not

displayed, press RES ET CYCLE.

2. The message “VACU UM” should

appear on the display. If it does not,

press the RE VIEW PROG RAM key

repeatedly until it does.

Note: Follow the A/C sys tem m a nufa ctur-

er’s recommenda tions for t he proper

vacuum and refrigerant requirements.

3. P ress the appropriate number keys

until the desired vacuum t ime

appears on the display. E ntervacuum time in w hole minutes.

For example, to program 20 minutes,

press two and zero — the display

shows “20.00.” P ress ENTER an d th e

display flashes once indicat ing t he

progra mmed da ta is accepted.

4. P ress the REVIEW P ROGRAM key.

The message “REFRIGERANT”

appears on the display. Ent er the

am ount of refrigerant to be recha rged

to hundredths of a pound.

For example, to program 23/4 pounds,

press two, seven, five and ENTER.

The display sh ows “2.75” a nd fla shes

once, indicating the programmed

data is accepted. To program 21/2

pounds, press t wo, five, zero a nd

ENTER — be sure to add t he last

zero.

Note: U se th e convenient conversion

chart on t he back cover of this ma nua l if

you need help convertin g ounces to

hundredths of a pound.

TO USE AUTOMATIC VACUUM/ CHARGING CYCLE

IMPORTANT! Before start ing the

va cuum pump, be sur e tha t a ll A/Csystem pressure is discharged.

1. Close the SYSTEM D ISCH ARGE

valve, and open the appropriat e high

side a nd/or low side va lves on th e

station.

2. P ress the START key on t he keypad.

The display shows the message

“AUTOMATIC” followed by the

message “VACU UM.”

3. After a s l ight delay the vacuum

pump start s . The display shows theam ount of t ime program med and

begins a countdown to zero.

4. At the end of the automa tic vacuum

cycle, the display shows the message

“HOLD.” C lose the high and low side

valves a nd m a ke sure the A/C syst em

holds a vacuum (if it doesn’t, perform

a ny n ecessa ry r epairs). Then open

the high a nd low side valves, and

press CONT to cont inue cha rging.

Note: Consu lt y our A/C sy st em service

guide for the proper chargingprocedure.

5. During the cha rging cycle, the

message “REFRI G ERANT” appears

on the display. The display shows the

progra mmed a mount of refrigeran t,

counts d own to zero as the char ging

process proceeds, a nd indica tes t he

end of the char ging process by

showing the message “CP L.”

6. If the refrigerant t ran sfer is too slow,

the sta tion emits an a udible signal,

the display countdown st ops, and the

message “CHE CK REFRIG ERANT”

appears on the display. P ress the

HOLD key and close the high side

valve, but leave the low side valve

open. St a rt t he A/C syst em, a nd press

the C ONT key to pull the rema inder

of the cha rge into th e low sid e of the

A/C sy st em.




2. Compare the gauge pressure read-

ings to the system ma nufacturer’s

specifications.

3. Check the cool air vent discharge

temperature to be sure that the

syst em cooling is a cceptable.

TO DISCONNECT THE SYSTEM

1. Turn off the A/C syst em.

WARNING

Disconnect hoses with extreme caution!All hoses may contain liquid refrigerantunder pressure. Read a nd follow a llwa rnings a t t he beginning of this manual

before operating the unit.

2. Disconnect the blue an d red hose

couplers from t he A/C s yst em.

3. Replace the caps on all fit t ings. Store

the hoses on the cart , a nd store thecouplers by connecting t hem t o the

coupler ra ck.

!

If the signal continues and t he

display does not count down, press

the HOLD key an d replace the tank

as described in “Insta lling a Refriger-

an t Tan k.” P ress the CONT key to

complete th e au toma tic cycle, or

press RESET to access the program

mode.

7. When th e aut omatic cycle is com-

pleted, the sta tion beeps once, an d

the message “CPL” appears on the

display , followed by the “H OLD”

message. Pr ess any key to a ccess the

program mode.

TO CHECK FINAL SYSTEM OPERATION

B efore disconn ecting t he A/C sy st em

from the sta tion, you should check tha t it

is operating properly.

CAUTION! B efore st a rt ing t he A/Csystem, be sure both valves on the

station’s manifold are closed.

1. Run th e A/C system unt il the gauge

readings sta bilize.


!

Follow t hese instru ctions to properly

ma inta in your a utomat ic A/C charging

sta tion. Be sure to wipe up any spills

immediately a nd keep the sta tion clean.

STORING THE STATION1. Turn off the MAIN P OWER switch,

and unplug the station.

2. St ore the hoses on the car t , an d store

the couplers by connecting them to

the coupler rack.

3. Close all valves when the sta tion is

not in use.

MAINTAINING THE VACUUM PUMP

1. Check the vacuum pump oil daily,

a nd a dd oil as necessary. The proper

level is at the midpoint of the sight

glass w hen the vacuum pump is

runn ing a nd t he A/C syst em is under

vacuum.

N ote: Use only our P remium High

Vacuum P ump Oil (see “Repla cement

P ar ts Lis t ”).

2. For maximum efficiency a nd longer

pump life, change the vacuum pump

oil frequently (approximately after

every four hours of running time).

Read a nd follow the deta iled instructionsin the vacuum pump operat ing man ual

to chan ge oil.

CHECKING THE SCALE ACCURACY

You should routinely check the accuracy

of the scale platform a nd calibrat e the

scale, if necessary, to assure th at the unit

charges accurately.

1. While in the P ROGRAM mode,

simultan eously press the E NTER an d

zero keys on the keypa d to clea r th e

display.

2. P ress the “6” key on the keypad to

display the a pproximate scale

platform weight.

3. Remove the ta nk from the scale

platform. The empty platform weight

display ed should range from + tw o

pounds. If it does not, contact the

factory.

Maintenance Instructions



USING MANUAL DIAGNOSTICS

The s ta t ion has internal and m anua l

dia gnostic modes. The int erna l or self-

dia gnostic mode checks for entr ies or

pressures outside of normal limits and

for cert a in electrical conditions. The

ma nua l diagnostic mode allows you to

check major components for properoperation.

The station’s safety features include a

check valve which prevents high side

pressure from entering t he refrigera nt

tank. Also, any operating problems

resulting in an error message on the

display prevent opera tion until th e

problem is corrected.

WARNING

Be sure to discharge any system pres-sure before performing any manualdiagnostics.

1. I f the message “PROGRAM” is not

displayed, press the RES ET CYCLE

key.

2. Simulta neously press the ENTER

a nd zero keys. The display should be

blan k except for the decimal point.

3. P ress the following keys to perform

these functions:

Pr ess “1” — The VACU U M displa y

segment comes on, the vacuumsolenoid opens, and the pump starts.

P ress “1” aga in to turn off.

Pr ess “3” — The REF RIG ERANT

display segment comes on and the

solenoid opens. This is a momenta ry

conta ct switch w hich turns off when

released. C lose the high an d low side

valves to perform this test.

Pr ess “5” — All display segments

light up. Pr ess “5” a gain t o turn off.

Pr ess “6” — The display shows t he

approximat e weight on t he scale. See

“Checking the Scale Accuracy” for

dia gnostic procedures.

4. P ress the RESET CYCLE key to

return t o the program mode.

CALIBRATING THE SCALE

You should also routinely calibrate the

scale, if necessary, to a ssure that the

compressor shuts off when t he ta nk is

full. You can a utomat ically calibrat e the

scale through the keypad.

WARNING

Proper operation of the scale is essen-tial to safety features built into thestation. If you have any questions aboutscale accuracy, call the factory.

1. P ress ENTER a nd the zero key on

the keypad to access the diagnostic

mode, then press 8-7-8-7. The display

will sh ow “A1.”

Note: If you press a ny other key before

the 8-7-8-7 sequence, you cannot enter

the a utomat ic calibration routine.

2. B e sure the scale is empty of all

weight (e.g. ta nk). P ress “0” a nd t hen

press ENTER on the keypa d. The

display shows “0.00” and then

chan ges to the messa ge “A2.”

3. P lace a known weight (between 10

a nd 80 pounds) in th e cent er of the

scale platform. Enter tha t w eight on

the display using the keypad, t hen

press ENTER . The display r eturn s to

the VACU UM mode.

4. To re-enter th e diagnostics mode a ndverify t he calibrat ion, simulta neously

press ENTER and the zero key on the

keypad. Then press “6.” The display

shows the known w eight on th e scale

platform.

5. Remove the known weight , and the

display r eturn s to “0.00.”

Maintenance Instructions

! !

! !



HOW TO USE THE CONTROLS

The charging station has various compo-

nents t ha t control its opera ting func-

tions.

CAUTION! D o no t operate t he stat ionuntil you ha ve filled the vacuum pump

wit h oil and removed th e exha ust plug

from the pump’s handle, as outlined in“Preparing the Vacuum Pump.”

1. SYSTEM DISCHARGE Valve — Letsyou depressu rize t he A/C sy st em.

Connect to a refrigerant recovery

unit — do no t vent refrigerant t o the

atmosphere.

2. LOW Side Valve — When closed,isolat es th e low sid e of the A/C

system from t he sta tion controls.

N ote: The ma nifold is ported so tha t t he

gauges indicate pressure wh ether or notthe valves are open.

3. LOW Side Compound Gauge — Whenconnected t o the low side of a n A/C

system, indicates the system’s low

side pressure.

4. HIGH Si de Va lve — When closed,isolat es th e high side of th e A/C

system from t he sta tion controls.

5. HIGH Side P ressure Ga uge — Whenconnected t o the h igh side of a n A/C

system, indicates t he system’s highside pressure.

6. Display — Shows the t ime pro-

gram med for vacuum, the w eight of

refrigeran t programm ed for charg-

ing, the control sta tus, a nd t he cycle

of operation. Detailed instructions for

program ming th e display follow the

next section.

7. Keypa d — Accomplishes specific

operating functions, as described in

the next section.

8. MAIN POWER Switch — Supplieselectrica l power t o the cont rol panel.

9. ACCESSORY Outlet — Pr ovides anelectrica l outlet for a ccessory equip-

ment, such as a thermistor vacuum

ga uge. This outlet is energized w hen

the sta tion is plugged in, an d it is

loca ted on t he side of the control box.

N ote: There is no accessory outlet on the

220V 50Hz m odel.10. HEATER Outlet — Provides a n

electrical outlet for the refrigerant

tank’s heater blanket. This outlet is

contr olled by th e MAIN P OWER

switch a nd is energized when the

pow er is on.

11. PUMP Outlet — Provides an electri-cal outlet for th e vacuum pum p. This

outlet is controlled by t he logic board.

Additional Operating Guidelines

Di agram of Contr ol Components



Additional Operating

Guidelines

USING THE KEYPAD

The cha rging sta tion also has a unique

keypad for da ta entry. It uses only six

keys for sequence control, and the LCD

display indicat es the opera ting m ode.

CAUTION! Do no t operate t he sta tionuntil you ha ve filled th e vacuum pump

with oil an d removed th e exha ust plugfrom the pump’s handle, as outlined in

“Preparing the Vacuum Pump.”

START — P ress to begin the a utomat iccycle after t he charging st at ion is pro-

grammed.

CONT — Pr ess to resume (or cont inue)operations a fter pressing the H OLD key

(described below).

HOLD — P ress to interrupt t heaut oma tic cycle.

REVIEW PROGRAM — P ress to review the existing programmed data.

ENTER — P ress to enter program da tainto t he computer’s memory.

RESET CYCLE — Press t o accessprogram mode.

ADD .2 LB. REFRIG. — P ress to partia llycha rge t he A/C sy st em.

USING THE DISPLAY PANEL

The charging sta tion a lso displays

various messages on the display pa nel.

CAUTION! Do no t operate t he sta tionuntil you ha ve filled th e vacuum pump

with oil an d removed th e exha ust plug

from the pump’s handle, as outlined in

“Preparing the Vacuum Pump.”

Segment A — Indicat es in wh ich modethe sta tion is operating:

PROGRAM — The sta tion is in t heprogra mming m ode, which a llows

you to program va cuum time and

refrigerant weight or to review th e

existing program.

HOLD — The evacuation process iscomplete a nd t he vacuum pump is

off, or no refrigerant is being

charged; also HOLD is used whilechanging a refr igerant ta nk or to

interr upt t he vacuum /char ging

cycles.

AUTOMATIC — Eith er the vacuumor refrigerant charging cycle is in

process.

Segment B — Indicates th e stat ion iseither eva cuat ing t he A/C sy stem or

charging refrigerant or the sta tion is

rea dy t o be program med for one of these

tw o functions:

VACUUM

• Wi t h PR O GR AM, ind ica t e s t h e

sta tion is ready t o be programmed for

evacuation.

• With AUTOMATIC, indicates the

vacuum pump is running; the num-

ber displayed counts down in sec-

onds, showing the a mount of t ime

remaining for evacuat ion.

• With HOLD, indica tes the vacuum

cycle is complete (if t he displa y sh ows

“0.00”), or if you pressed the H OLD

key to interrupt the vacuum cycle,

indicat es the rema ining t ime the

pump runs when you press the

CONT key.

Di agram of K eypad



Qu i ck Refer ence Cha r t

Segment B Messages

VACUUM + PROGRAM = Program station for vacuumVACUUM + AUTOMATIC = Vacuum pump is runningVACUUM + HOLD = Evacuation complete or

interrupted vacuum cycle

REFRIGERANT + PROGRAM = Program station for chargeREFRIGERANT + AUTOMATIC = Station is charging A/C systemREFRIGERANT + HOLD = Interrupted charging cycle

REFRIGERANT (POUNDS)

• Wi t h PR O GR AM, ind ica t e s t h e

sta tion is ready to be programmed

for t he am ount of refrigera nt to be

char ged int o the A/C system ;

on the keypad enter th e charge in

pounds (or kilogram s, depending on

th e model you ha ve).

• With AUTOMATIC, indicat es the

sta tion is charging refrigerant into

th e A/C sy stem; t he num ber shown

on the display counts down, showing

the remaining a mount of refrigerant

to be dispensed.

• With HOLD, indica tes the HOLD key

wa s pressed to interrupt the charging

cycle; the number shown on the

display is the a mount of refrigerantremaining t o be charged into the

syst em. To cont inue cha rging, press

CONT.

Use the quick reference chart above to

interpret Segment B messages.

Segment C — Shows a number or acoded error m essage on the display tha t

indicat es the sta tion’s operating sta tus or

a ny specific problems.

NUMBER

Indicates the vacuum time in min-

utes or the refrigerant weight in

pounds (or kilogram s, depending on

th e model you ha ve).

MESSAGE CODES

• C PL — I n dica t e s t h e r ef ri ger a n t

char ging cycle is complete.

• ERR5 — Indica tes an over loaded or

broken scale.

Segment D — Indicat es the tra nsfer ofrefrigerant is slow or has stopped.

• I f th e d i sposab l e ta nk i s emp ty or

t h e r ef i l l a b l e t an k i s l ow , replace

the t an k following the instr uctions in

“Insta lling a Refrigerant Tan k.” A

small amount of refr igerant a lwaysremains in a refillable ta nk.

• I f t h e r e i s adequa t e r ef r i g er an t i n

t h e t a n k , you need to pull the

remainder of the program med charge

int o the low si de of the A/C sy st em,

a s outlined in S tep 7 of “To Use

Automa tic Vacuum /Cha rging Cycles.”

Additional Operating Guidelines

Di agram of Di splay Panel



Replacement Parts List

The followin g is a list of replacement

part s you ma y need to service or ma in-

tain your automatic charging station.

Because of ongoing product improvements, we

reserve the right to change design, specifications,

or materials without notice.

Our P remium High Vacuum P ump Oil is

also available in handy quart containers

or in convenient gallon containers:

Qua rt (shipped 12 qua rt s per case) 13203

G a llon (shipped 4 gallons per case) 13204

This oil ha s been specifically blended t o

mainta in ma ximum viscosity and to

improve cold w eather st ar ts .

Description 115V 60 Hz 220V 50 Hz

Handle (Red) 40448 40448

Handle (Blue) 40447 40447

Gauge, Blue Low Side Compound 11741 11726

Gauge, Red High Side Pressure 11742 11727

High Side Coupler 18191 18191

Low Side Coupler 18190 18190

Vacuum Pump RA15427 RA15428120” Blue Hose 62120 62120

120” Red Hose 63120 63120

60” Yellow Hose 37160 37160

9” Blue Hose 37059 37059

Tank Hose 37024 37024

Black Vacuum Hose 40586 40586

Main Power Switch RA40994 RA40994

Scale Assembly RA19008 RA19008

Tank Platform RA14967 RA14967

Heater Blanket 10994 45605

Vacuum Solenoid Assembly RA19020 RA19020

Refrigerant Solenoid RA19006 RA19006

Main Board RA18761 RA19092

Keypad RA18751 RA18751

Check Valve RA17112 RA17112

Tank Strap RA19056 RA19056

Cover 17495 17495

Wheel & Nut RA10751 RA10751

Transformer N/A RA19091

High Vacuum Grease 13033 13033



Symptom Cause Cure

• Station unplugged • Plug station into power

source

• No power at wall outlet • Locate problem with outlet or

change outlets

• Vacuum pump unplugged • Plug pump into power source

• Vacuum time not entered • Program required vacuum

time

• Defective vacuum pump • Remove and replace pump

• Faulty components • Call factory

• Transfer stopped or • Start A/C system and pulltoo slow rest of refrigerant into system

(Step 6 in “To Use Automatic

Vacuum/Charge Cycle”)

• Tank safety strap too tight • Loosen the safety strap

• Refrigerant supply empty • Replace the refrigerant tankor call factory

• Refrigerant supply empty • Replace the refrigerant tank

• Discharge valve open • Close discharge valve

• Low side valve closed • Open low side valve

• Pump oil contaminated • Flush and change pump oil

• Hose gasket damaged • Replace gasket or hose

• Charging line loose • Check connections

• Manifold leaking • Check connections

• Pump’s Iso-valve closed • Open Iso-valve

• Overloaded or broken • Check tank weight, recali-

scale brate if necessary, or callfactory

Trouble- Shooting Tips

No power when

POWER switch is on — no display showing

Vacuum pump does not start

Audible tone sounds and “ CHECK REFRIG- ERANT ” message

displays during refrigerant transfer

Refrigerant doesn ’ t flow

or “ REFRIGERANT ” message doesn ’ t

display

Vacuum pump runs, but

low side gauge does not register an appropriate

vacuum

ERR5


16/16

For assistance in servicing or using theAutomatic A/C Charging Station, call thetoll-free Service Line, 800-822-5561, inside

the continental U.S. In Canada, call 419-485-5561, Ext. 300. In all other locations,contact your local distributor. To help usserve you better, please be prepared toprovide the model number, serial number,and date of purchase.

To validate your warranty, you must com-plete the warranty card attached to yourstation and return it within ten days fromdate of purchase.

Ounce Pound

1 .062 .123 .19

4 .255 .31

6 .387 .44

8 .509 .5610 .62

11 .6912 .75

13 .81

14 .8815 .9416 1.00

PSI(oF) R-34a

-20 -1.8-15 0

-10 2.0-5 4.1

0 6.55 9.1

10 12.0

15 15.120 18.4

25 22.130 26.1

35 30.4

40 35.045 40.1

50 45.455 51.3

60 57.465 64.0

70 71.175 78.580 86.7

85 95.390 104.3

95 113.9100 124.1

105 134.9110 146.3

115 158.4120 171.1125 184.5

130 198.7135 213.5

140 229.2

Note : Gauge pressures are approximationsrounded to the nearest 1/20 PSI.

Temperature — Pressure RelationR-134a Refrigerant

Conversion ChartOunces to Hundredths of a Pound

Robinair Way Montpelier, OH 43543-0193 USA

Phone 419-485-5561FAX 419-485-8300

ROBINAIR

Robinair DivisionSPX Corporation

x SP

Robinair Mod 10324

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