Robinair Recovery Recycling Recharging Unit 34288 Users Manual

2015-02-06

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Operating Manual for

Model 34288

Recovery, Recycling, Recharging Unit

Model 34288
Recovery, Recycling, & Recharging Unit
SAFETY DEFINITIONS: Follow all WARNING, CAUTION, 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; 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.

WARNINGS
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.
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.
AVOID BREATHING A/C REFRIGERANT AND LUBRICANT VAPOR OR MIST. Exposure may irritate eyes,
nose, and throat. To remove refrigerant from the A/C system, use only equipment certified for the type of
refrigerant being removed. 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.
CAUTION—DO NOT PRESSURE TEST OR LEAK TEST EQUIPMENT AND / OR VEHICLE AIR CONDITIONING SYSTEMS WITH COMPRESSED AIR. Some mixtures of air and refrigerant have been shown to be
combustible at elevated pressures. These mixtures, if ignited, may cause injury or property damage.
TO PREVENT CROSS-CONTAMINATION, 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.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

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

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Recover Refrigerant from a Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Evacuate the A/C System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recharge the A/C System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Manually Fill the Internal Storage Vessel (ISV) . . . . . . . . . . . . . . . . . . . 12
Replace the Filter-Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Check Remaining Filter Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Change the Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Adjust Tank Fill Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Check for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Change Vacuum Pump Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Scale Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Tank Recertification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Spanish Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
French Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
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 Robinair, complete the warranty card included in the accessory
kit, and mail it within ten days from the purchase date of the unit.
543175 Rev. H, June 25, 2013

Introduction
Robinair No. 34288 is used on R-134a vehicles and is designed to be compatible with existing service
equipment and standard service procedures. Model No. 34288 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 1.5 cfm (42 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.
Manifold Gauges:
connect to vehicle A/C system;
show system’s low-side and
high-side pressure.
Digital Display: visual
interface between operator
and machine.
Panel Valves:
direct system’s low-side
and high-side pressure.

Tool Storage Area
(additional storage
on back side for
extra filter-driers and
oil bottles).

Technical Specifications
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 115V, 60 Hz

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

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

Main Power Switch: supplies
electrical power to unit.

Power Cord

Pump Free-Air Displacement . . . 1.5 cfm (42 l/m)

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

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

Introduction
Keypad Functions
START /
YES

START / YES begins or resumes a
function, or answers a query.

STOP /
NO

STOP / NO terminates or pauses a
function, or answers a query.

MENU displays the selection menu.
ARROWS are used for scrolling
through menu items.

RECOVER

START /
YES

RECOVER
MENU

RECOVER activates the recovery
sequence.

VACUUM

VACUUM activates the vacuum
sequence.

CHARGE

CHARGE charges the vehicle A/C
system with a programmed amount
of refrigerant.

STOP /
NO

VACUUM
CHARGE

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. 34288.

543175 Rev. H, June 25, 2013

Introduction
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
VERSION X.XX
SELECT UNITS
MAINTAIN VACUUM OIL
MAINTAIN FILTER
REFRIG MANAGEMENT
MANUAL REFILL
ADJUST TANK FILL LVL
CALIBRATION CHECK
SERVICE MENU
DISPLAY TANK INFO

Operator may choose to have prompts displayed in one of three
languages: English, Spanish, or French.

Version X.XX

Displays the revision level of the software in the unit.

Select Units

The operator may choose to have test results displayed in
Imperial (lb.), Imperial (lb. and oz.), or Metric (kg).

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.

Maintain Filter

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.
Start / Yes
Button

Select Language

Stop / No
Button

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.

Refrig Management

Displays the amount of refrigerant recovered, charged, and
replenished (for the life of the unit), and filtered (since the last
filter change).

Manual Refill
Arrow
Keys

START /
YES

STOP /
NO
RECOVER

VACUUM
CHARGE

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.

Adjust Tank Fill Lvl

During the tank refill process, the unit stops refilling when it
reaches the 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.

Calibration Check

Use to verify internal scale calibration. Refer to instructions in
Maintenance section under Scale Calibration Check.
Menu
Button

Service Menu

For Robinair service center use only.

Display Tank Info

Displays internal storage vessel (ISV) pressure and temperature.
Use to check the ISV for excessive pressure.

Setup
Unpack the Accessory Kit

Unpack the accessory kit from the bag, and remove the
plastic packaging. The kit consists of
• Low-side tank adapter.
• 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 : 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.

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.

Main
Power Switch

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

Power
Cord

The operator may choose to have prompts displayed in
one of three languages: English, Spanish, or French.
1. Use the UP or DOWN arrow key to toggle through
the choices for English, Spanish, or French.

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.

Figure 1

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.

543175 Rev. H, June 25, 2013

Setup
Set Tank Fill Level

Vacuum Pump

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.

Fill Port
Sight
Glass

The unit displays

LEVEL: 15.00 LBS.
ENTER TANK FILL LVL
LIMIT: 4 TO 17 LBS.
PRESS START / YES TO SAVE

1. Press START / YES to accept the default amount,
or use the arrow keys 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.

Fill Port

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 2.

2. 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.

Sight Glass

Figure 2

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.

Setup
Fill the Internal Storage Vessel (ISV)

1. 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, attach the
low-side tank adapter to the liquid valve on
the tank. Attach the low-side service hose to
this adapter. See Figure 3.

Low- and
High-Side
Hoses

Hose
Storage
Fittings

3. Open the source tank valve and the low-side
panel valve. See Figure 4.

Power
Cord

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.

Source
Tank
Strap

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.

Figure 3

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. Close the source tank
valve. Disconnect the .low-side .service
.
The unit is ready for operation.

Note: There is no need to calibrate the scale; it is
calibrated at the factory.

543175 Rev. H, June 25, 2013

Low- and
High-Side
Panel Valves

Figure 4

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. Open the high- and low-side panel valves on the
control panel.

Oil Drain
Bottle

5. Press the RECOVER button.

Note: The clicking noise heard during the recovery
process indicates the solenoid is opening and closing —
this is normal.
6. 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.

Figure 5

7. 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.

8. 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.
• Use only new oil to replace the oil removed during
the recycling process.
• 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.

Operating Tips
After the RECOVER function is selected :

• If system pressure is below 10 psi, the display
reads
LOW 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.

Operating Instructions
Evacuate the A/C System

1. Ensure service hoses are connected, and coupler
valves are OPEN.
2. Press VACUUM.

3. 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.

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.

4. 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.

543175 Rev. H, June 25, 2013

Operating Instructions
Recharge the A/C System

1. Press CHARGE. Open the appropriate panel valve(s),
depending on where the system should be charged –
high-side, low-side, or both.

2. Press CHARGE again to change the units of
measure. Accept the default weight by pressing
START / YES, or use the arrow keys to scroll to the
correct amount, and press START / YES.
3. 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.
4.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.
5. Close the high-side coupler valve. The display reads
DISCONNECT HS HOSE
OPEN PANEL VALVES
AND START A/C MAX
START TO CONTINUE

The high-side hose must be removed from the
vehicle, and the low-side hose must stay
connected to the vehicle with the low-side
coupler open.
6. Open both panel valves.

Operating Tips
• After selecting the CHARGE function and
entering a desired weight, if the weight
entered will leave less than 2 lbs. (.91 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).

Operating Instructions
Recharge the A/C System contd.

7. Place the vehicle gear selector in park or neutral,
with the emergency brake ON.

8. Start the vehicle. The A/C system should be set at
maximum.
9. Press START / YES. The display reads

EQUALIZING HOSES .
REMOVE LS HOSE WHEN .
HS + LS ARE < 40 PSI
PLEASE WAIT

This allows the vehicle’s compressor to pull
refrigerant into the A/C system. When both gauges
read below 40 psi, close both panel valves and the
low-side coupler valve. The display reads
DISCONNECT LOW SIDE HOSE
START TO CONTINUE

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.

10. 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.

543175 Rev. H, June 25, 2013

Maintenance
General Maintenance

1. On a regular basis, wipe off the unit using a clean
cloth to remove grease and dirt.

2. 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.

Circuit
Breaker
MAIN POWER
BREAKER

Electrical Protection

The unit is equipped with a 15 amp circuit breaker on
the back panel. See Figure 6. If the breaker trips, its
button will pop out. A tripped circuit breaker will cause
the unit to lose all power.

Figure 6

Press the circuit breaker button to reset.

Back View

Manually Fill the
Internal Storage Vessel (ISV)

This menu item is used to transfer refrigerant from a
source tank to the internal storage vessel.

1. Press Menu, and use arrow keys to select MANUAL
REFILL. Press START / YES. The unit displays
CONNECT SOURCE TANK .
TO LS SERVICE HOSE .
OPEN LS PANEL VALVE .
START TO BEGIN

2. Connect the low-side tank adapter to the liquid valve
on the tank. Connect the low-side service hose to this
tank adapter. Open the low-side panel valve.

Low- and
High-Side
Hoses
Source
Tank
Strap
Power
Cord

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.
6. Close the source tank valve. Disconnect the low-side
service hose.

Figure 7
Side View

Maintenance
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.

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 filterdrier includes the code necessary to
make the unit operable again.

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
arrow keys to enter the serial number that appears
on the new filter-drier, and press START / YES.

543175 Rev. H, June 25, 2013

Operating Tips
Enter the Serial No. for a New Filter-Drier
Use an arrow key to change the selected digit to
the corresponding number or letter in the serial
number. When the correct letter or number is
displayed, press START / YES to select it and
move to the next digit. Repeat this process until
the entire serial number has been entered, and
press START / YES.

Maintenance
Replace the Filter-Drier contd.
5. The display reads PLEASE REPLACE FILTER.
Open the rear door of the unit and unscrew the old
filter. See Figure 8.
6. Look at the new filter—verify both o-rings are
lubricated and correctly located in the grooves. See
Figure 9. Thread the new filter into place. Press
START / YES.

Filter-Drier

Note: If the display shows SERIAL NUMBER ERROR,
the serial number is invalid or the filter-drier has
already been used in this unit.

Rear View
(without shroud)

7. Close the door. Press STOP / NO to exit. The filterdrier replacement is now complete.

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

Figure 8

O-rings

Figure 9

LEVEL: 15.00 LBS.
ENTER TANK FILL LVL
LIMIT: 4 TO 17 LBS.
PRESS START / YES TO SAVE

3. Use the arrow keys to enter a value between 4 lbs.
and 17 lbs., and press START / YES.

Check for Leaks

Check the unit for leaks every three months, or as
specified by law in your jurisdiction.

1. Turn off MAIN POWER, and disconnect the power
cord from the outlet.

2. Open the rear door; remove top cover and front panel.

3. Use a leak detector to probe all connections for
refrigerant leaks. Tighten fittings if a leak is indicated.
4. Reassemble the body panels, and close the rear door.

Inspect the unit periodically for leaks.
The manufacturer does not reimburse
for lost refrigerant.

Maintenance
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.)

Oil Fill Port

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 10, and remove the brass plug from
the vacuum pump’s oil fill port. (The pump drains
faster when vented.)

4. Remove the oil drain fitting cap, and drain the oil into
a suitable container for disposal. Replace the cap.
5. 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.

Oil Drain Fitting

Sight Glass

Figure 10

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.

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.

543175 Rev. H, June 25, 2013

Maintenance
Scale Calibration

The calibration check is used to ensure the unit’s internal
scale is always calibrated. During this test, use only the
calibration weight that is provided with the unit.

Figure 11

1. Press Menu.

2. Use the arrow keys to scroll to CALIBRATION
CHECK.

3. Refer to Figure 11, and verify the magnet on the
bottom of the unit is clean. Press START / YES.
4. The display reads

ATTACH THE WEIGHT TO THE BOTTOM OF THE
MACHINE
PRESS START TO CONTINUE

5.Attach the weight provided to the magnet on the
bottom of the unit. Press START / YES.

Magnet

• If the display shows CALIBRATION APPROVED, the scale is in calibration. Press any key to exit.

• If the display shows CALIBRATION REJECT, the scale is out of calibration. Call your local service
center for assistance.
• If the display shows CALIBRATION ERROR 1, verify the calibration weight is correctly attached
to the magnet, and verify the magnet is clean with nothing attached to it. If that does not correct the
problem, call your local service center for assistance.

Tank Recertification

The internal storage vessel (ISV) in this unit is a
DOT-approved tank that carries a date code. ISVs
must be recertified every five years.

To determine the date code of the ISV in your
Robinair unit, remove the front panel of the unit. It
should be possible to read the date code stamped on
the ISV.
If the date code reads beyond the five-year limit,
contact a Robinair service center for assistance.

Replacement Parts

Component

Filter-Drier

Service Coupler Set .
(high- and low-side couplers)
Service Hose Set .
(high- and low-side hoses)
Vacuum Pump Oil .
(case of 12 quarts)

34724

18192
34722
13203

Vacuum Pump Oil .
(case of 4 gallons)

13204

Vinyl Dust Cover (optional)

17492

Maintenance Kit
Tank Adapter

Repl.
Part No.

13172
16301

Robinair
Limited Warranty Statement

Declaración de garantía
limitada Robinair

Rev. November 1, 2005

Revisión del 1 de noviembre de 2005

Révisée le 1er novembre 2005

Se garantiza que este producto no posee defectos de mano de obra, materiales y componentes
por el período de un año a partir de la fecha de
compra. Todas las partes y mano de obra requerida para reparar los productos con defecto
cubiertos bajo la garantía no tendrán costo.
Aplican las siguientes restricciones:
1. La garantía limitada aplica al comprador
original únicamente.
2. La garantía aplica al producto en situaciones
de uso normal únicamente, como lo indica
el Manual de funcionamiento. Al producto
se le debe dar servicio y mantenimiento
como se especifica.
3. Si falla el producto, se debe reparar o reemplazar a discreción del fabricante.
4. Los cargos de transporte de servicio de garantía serán reembolsados por la fábrica al
verificar el reclamo de garantía y presentar
una boleta de flete por servicio terrestre
regular. Se debe obtener la aprobación
del fabricante antes de hacer el envío a un
centro de servicio autorizado.
5. Los reclamos de servicio de garantía están
sujetos a inspección de defectos del producto.
6. El fabricante no será responsable de los
costos adicionales relacionados con fallas
en el producto, que incluyen pero no se
limitan a, tiempo improductivo, pérdida de
refrigerante, contaminación de refrigerante
y envío no autorizado o cargos por mano de
obra.
7. Todo reclamo de servicio de garantía se
debe hacer dentro del período de garantía
establecido. Se debe proporcionar la fecha
de la prueba de compra al fabricante.
8. El uso de equipo de recuperación/reciclaje
con refrigerantes o selladores no autorizados anula la garantía.
• Los refrigerantes autorizados se indican
en el equipo o están disponibles a través
del Departamento de servicio técnico.
• El fabricante prohíbe el uso de equipo
de recuperación/reciclaje en sistemas de
aire acondicionado (A/C) con fugas de
sellador, ya sea porque un sello se infla o
es de naturaleza aeróbica.

Ce produit est couvert contre les défauts de matériau, de fabrication et de composant pendant
un an à compter de la date d’achat. Toutes les
pièces et la main-d’œuvre nécessaires aux réparations sous garantie sont sans frais. Toutefois,
les restrictions suivantes s’appliquent :
1. La garantie limitée s’applique uniquement à
l’acheteur initial.
2. La garantie s’applique uniquement au
produit utilisé dans des conditions de
fonctionnement normales conformément au
manuel d’utilisation. Il doit être réparé et
entretenu conformément aux spécifications.
3. Si le produit subit une défaillance, il sera
réparé ou remplacé à la discrétion du fabricant.
4. Les frais de transport pour les réparations
sous garantie sont remboursés par l’usine
après l’évaluation de la réclamation au
titre de la garantie et après la soumission
d’une facture de transport terrestre standard.
L’approbation du fabricant est requise avant
l’expédition du produit à un atelier de réparation autorisé.
5. Les réclamations au titre de la garantie sont
sujettes à l’inspection du produit défectueux
par un personnel autorisé.
6. Le fabricant ne peut être tenu responsable pour
tout coût supplémentaire lié à la défaillance
du produit incluant, sans toutefois s’y limiter,
les interruptions de fonctionnement, la perte
de liquide frigorigène, la contamination des
liquides frigorigènes et l’expédition et/ou les
frais de main-d’œuvre soumis par des ateliers
non autorisés.
7. Toute réclamation pour des réparations au
titre de la garantie doit être soumise durant
la période de garantie. Une preuve d’achat
doit être fournie au fabricant.
8. L’utilisation d’un appareil de récupération et
de recyclage avec du liquide frigorigène ou
des scellants non spécifiés annule la garantie.
• Les liquides frigorigènes autorisés sont
indiqués sur l’appareil, ou ils peuvent
être obtenus auprès du Service technique.
• Le fabricant interdit l’utilisation d’un appareil de récupération et de recyclage dans
les systèmes de climatisation contenant des
colmatants pour fuites, que ce soient des
scellants à dilatation ou aérobiques.

This product is warranted to be free from
defects in workmanship, materials, and components for a period of one year from date of
purchase. All parts and labor required to repair
defective products covered under 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
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 upon
verification of the warranty claim and submission of a freight bill for normal ground
service. Approval from the manufacturer
must be obtained prior to shipping to an
authorized service center.
5. Warranty service claims are subject to
authorized inspection for product defect(s).
6. The manufacturer 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, crosscontamination of refrigerant, and unauthorized shipping and/or labor charges.
7. All warranty service claims must be made
within the specified warranty period. Proofof-purchase date must be supplied to the
manufacturer.
8. Use of recovery/recycling equipment with
unauthorized refrigerants or sealants will
void warranty.
• Authorized refrigerants are listed on the
equipment or are available through the
Technical Service Department.
• The manufacturer prohibits the use of
the recovery/recycling equipment on air
conditioning (A/C) systems containing
leak sealants, either of a seal-swelling or
aerobic nature.

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 recovering or recycling any substance other than the specified
refrigerant type. This includes, but is not
limited to, materials and chemicals used to
seal leaks in A/C systems.

Esta garantía limitada NO aplica si:
• El producto, o parte de éste, se rompe accidentalmente.
• El producto se usa incorrectamente, se
adultera o modifica.
• El producto se usa para recuperar o reciclar
cualquier sustancia que sea diferente al tipo
de refrigerante establecido. Esto incluye,
pero no se limita a materiales y productos
químicos utilizados para sellar fugas en
sistemas de A/C.

Énoncé de la garantie limitée
de Robinair

Cette garantie limitée NE s’applique
PAS si le produit :
• ou une partie du produit a été endommagé
par un accident.
• a été utilisé de façon inadéquate, ou qu’il a
été altéré ou modifié.
• est utilisé pour la récupération et le recyclage de substances autres que le type de
liquide frigorigène spécifié. Ces substances
comprennent, sans toutefois s’y limiter, les
matériaux et les produits chimiques utilisés
pour colmater les fuites des systèmes de
climatisation.

Visit our web site at www.robinair.com or call our toll-free
Technical Support Line at 800-822-5561
in the continental U.S. or Canada.

In all other locations, contact your local distributor. To help us serve you better, please be prepared to provide
the model number, serial number, and date of purchase of your unit.To validate your warranty, complete the
warranty card attached to the unit, and return it within ten days from date of purchase.
NATIONWIDE NETWORK OF AUTHORIZED SERVICE CENTERS
If your unit needs repair or replacement parts, contact the service center in your area. For help in locating a
service center, call the toll-free technical support line or visit www.robinair.com.

Visite nuestro sitio web en www.robinair.com o llame sin costo a
la línea de Asistencia técnica al 800-822-5561
en EE.UU. continental o Canadá.

En todas las demás ubicaciones, comuníquese con su distribuidor local. Para ayudarnos a servirle mejor, tenga a mano
el número de modelo, número de serie y fecha de compra de su unidad. Para validar la garantía, complete la tarjeta de
garantía anexa a su unidad y devuélvala dentro de los diez días siguientes a la fecha de compra.
RED NACIONAL DE CENTROS DE SERVICIO AUTORIZADOS
Si su unidad necesita reparaciones o partes de reemplazo, comuníquese con el centro de servicio de su área. Para obtener ayuda para ubicar un centro de servicio, llame sin costo a la línea de asistencia técnica o visite www.robinair.com.

Visitez notre site Web à www.robinair.com ou appelez sans frais
le soutien technique au 800-822-5561
sur le territoire continental des États-Unis ou au Canada.

Pour tout autre endroit, communiquez avec votre distributeur local. Afin de nous aider à mieux vous servir, soyez prêt à
nous donner le numéro de modèle, le numéro de série et la date de l’achat de votre unité. Afin de valider votre garantie,
remplissez la carte de garantie jointe à votre système et retournez-la dans les dix jours de la date d’achat.
RÉSEAU NATIONAL DES CENTRES DE SERVICE AUTORISÉS
Si votre unité a besoin d’être réparée ou à besoin de pièces de remplacement, communiquez avec le centre de service de
votre région. Pour vous aider à localiser un centre de service, appelez sans frais la ligne de soutien technique ou visitez le
www.robinair.com.
The Robinair 34288 unit is designed to meet all applicable agency certifications, including Underwriter's Laboratories, Inc., SAE
Standards, and CUL. Certain state and local jurisdictions dictate that using this equipment to sell refrigerant by weight may not be
permitted. We recommend charging for any A/C service by the job performed. This weight scale provides a means of metering the
amount of refrigerant needed for optimum A/C system performance as recommended by OEM manufacturers
La unidad Robinair 34288 está diseñada para cumplir con todas las certificaciones de agencia aplicables, incluyendo Underwriter’s Laboratories, Inc., Estándares SAE y CUL. Ciertas jurisdicciones estatales y locales prescriben que el uso de este equipo
para vender refrigerante por peso es posible que no sea permitido. Recomendamos que se cobre el trabajo realizado por dar
servicio al aire acondicionado. Esta escala de peso proporciona un medio para medir la cantidad de refrigerante que se necesita
para el rendimiento óptimo del sistema de aire acondicionado, tal como lo recomiendan los fabricantes OEM.
Le modèle 34288 a été conçu pour répondre aux certifications applicables de la Underwriter’s Laboratories, Inc., aux normes SAE
et CUL. Certains endroits dictent l’utilisation de cet équipement et il peut arriver que la vente de fluide frigorigène en fonction du
poids puisse être interdite. Nous vous recommandons de facturer les services de climatisation en fonction du travail effectué. Ce
poids de tarification permet de calculer la quantité de fluide frigorigène nécessaire pour un rendement optimum de la climatisation,
tel qu’il est recommandé par les fabricants de l’équipement d’origine.
Due to ongoing product improvements, we reserve the right to change design, specifications, and materials without notice.
Debido a las constantes mejoras del producto, nos reservamos el derecho de cambiar diseño, especificaciones y materiales sin aviso.
En raison des améliorations constantes apportées à nos produits, nous nous réservons le droit de changer de concept, de spécifications et de matériaux sans préavis.

655 Eisenhower Drive
Owatonna, MN 55060 USA
Tech Services: 1-800-822-5561
Fax: 1-866-259-1241
Customer Service: 1-800-533-6127
Fax: 1-800-322-2890
Web site: www.robinair.com

543175 (Rev. H, June 25, 2013)

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Robinair Recovery Recycling Recharging Unit 34288 Users Manual

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