Robinair AC375C User Manual
Owner’s Manual
Manual del propietario
Model AC375C
Refrigerant Recovery, Recycle,
and Recharge Unit
Modelo AC375C
Unidad de refrigerante,
recuperación y reciclaje
Model AC375C
Recover, Recycle, and Recharge Unit
for R-12 or R-134a Refrigerant
Voltage: 220–230; 50–60 Hz
SAFETY DEFINITIONS: Follow all WARNING, CAUTION, IMPORTANT, and NOTE messages in this manual.
These messages are dened as follows: WARNING means you may risk serious personal injury or death; CAU-
TION means you may risk personal injury, property damage, or serious unit damage; IMPORTANT means you may
risk unit damage; and NOTEs provide clarity and helpful tips. These safety messages cover situations ROBINAIR
is aware of. ROBINAIR cannot know, evaluate, and advise you regarding all possible hazards. You must make sure
all conditions and procedures do not jeopardize your personal safety.
COPYRIGHT: No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form
or by any means (electronic, mechanical, photocopy, recorded, or otherwise) without the prior written permission of
ROBINAIR.
DISCLAIMER: All information, illustrations, and specications contained in this manual are based on the latest in-
formation 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. ROBINAIR shall not be liable for errors contained
herein or for incidental or consequential damages (including lost prots) 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 these instructions, operating instructions and safety precautions must be
read and discussed in the operator’s native language.
PRESSURIZED TANK CONTAINS LIQUID REFRIGERANT. Do not recover or charge refrigerants
into non-rellable containers; use only authorized rellable containers.
ALL 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.
AVOID USING AN EXTENSION CORD. An extension cord may overheat and cause re. 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 ammable substances.
DO NOT USE COMPRESSED AIR TO PRESSURE TEST OR LEAK TEST THE UNIT OR VEHICLE AIR CONDITIONING SYSTEM. Some mixtures of air and refrigerant are combustible at
elevated pressures. These mixtures are potentially dangerous and may result in re or explosion
causing personal injury or property damage.
USE THE UNIT WITH EITHER R-134a OR R-12 REFRIGERANT. The unit is designed for recover-
ing, recycling, and recharging either R-134a or R-12 refrigerant. The user must dedicate the unit
to only one type of 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 opening the back door or servicing
the unit.
Table of Contents
Safety Precautions....................................................... inside front cover
Introduction ......................................................................................... 2
General Description ......................................................................................... 2
Glossary of Terms ............................................................................................2
Component Identification and Location ............................................................ 3
Unit Front View ......................................................................................... 3
Unit Side View...........................................................................................3
Unit Back View .......................................................................................... 4
Vacuum Pump .......................................................................................... 4
Control Panel ............................................................................................5
Symbol Definitions ....................................................................................6
Software Functions ...................................................................................6
Initial Setup.......................................................................................... 7
Unpacking the Accessory Kit ........................................................................... 7
Placing the Translation Decal .......................................................................... 7
Adding Vacuum Pump Oil ................................................................................8
Adding Refrigerant to the Internal Storage Vessel ......................................... 10
Drain Oil ..................................................................................................13
Operation ............................................................................................14
Operating Guidelines ..................................................................................... 14
Recovering the A/C System Refrigerant ........................................................16
Draining the A/C System Oil .......................................................................... 18
Evacuating the A/C System ........................................................................... 19
Replenishing the A/C System Oil ...................................................................20
Recharging the A/C System Refrigerant ........................................................21
Clear Hoses ............................................................................................. 22
Slow Charge............................................................................................. 22
Maintenance ....................................................................................... 23
Adding Additional Refrigerant to the Internal Storage Vessel ........................ 23
Drain Oil ..................................................................................................24
Changing the Vacuum Pump Oil .................................................................... 25
Resetting Oil Time .................................................................................. 26
Replacing the Filter-Drier ...............................................................................27
Resetting the Filter-Drier Capacity .......................................................... 29
Checking for Leaks ........................................................................................ 30
Calibrating the Weight Scale .......................................................................... 31
Cleaning the Unit............................................................................................31
Replacement Parts............................................................................. 32
Limited Warranty.......................................................... inside back cover
Recover/Recycle/Recharge Unit
1
Introduction
General Description
CAUTION
Once the
machine has
been dedicated
to a specific
refrigerant, do
NOT adapt the
unit to another
refrigerant. Do
not mix
refrigerants
through a
system or in the
same container;
mixing
refrigerants
will cause severe
damage to the
unit and the
vehicle air
conditioning
system.
::
:
::
The AC375C recovers, recycles, and recharges vehicle refrigerant in one
hookup. It is compatible with existing service equipment and standard service
procedures.
The AC375C may be configured to recover, recycle, and recharge either
R-134a or R-12 refrigerant. Once configured to R-12 or R-134a, the unit
should be used only with the refrigerant for which it was initially
configured.
The AC375C is equipped with a power receptacle; the user provides the
power cord, depending on the electrical power connection in the region where
the unit is being used.
Throughout this manual metric measurements are used with U.S. equivalents
in parentheses.
Glossary of Terms
A/C System — The vehicle air conditioning system being serviced.
Hose Storage Fittings — When not in use, the R-134a fittings can be connected to
these fittings for storage purposes.
Internal Storage Vessel (ISV) — The refillable refrigerant storage vessel inside
the unit.
Panel Valves — The high-side and low-side valves on the control panel, when
described together.
Service Couplers — The couplers on the service hoses used to connect the hoses
to the A/C system or to a source tank.
Service Hoses — The red and blue hoses used to connect the unit to the A/C system.
Source Tank — A tank of new refrigerant used to refill the internal storage vessel.
Unit — The recover, recycle, and recharge unit.
2
© 2006 SPX Corporation
Component Identification and Location
Introduction
Unit Front View
Oil Injector Bottle
Internal Storage Vessel
ISV Weight Scale
Unit Side View
Control Panel
Tool Tray
Vacuum Pump
Oil Drain Bottle
Hood
Hose Storage Fittings
(for R-134a dedicated units)
Source Tank Compartment
Owner’s Manual Compartment
Power Receptacle
Source Tank Strap
INST0986
Recover/Recycle/Recharge Unit
3
Introduction
Component Identification and Location contd.
Unit Back View
Filter-Drier
Circuit Breaker
Vacuum Pump
(location shown on previous page)
Oil Fill Port
Oil Sight Glass
Oil Drain Port
4
© 2006 SPX Corporation
Component Identification and Location contd.
Introduction
Control Panel
Low-Side
Gauge
Low-Side
Panel Valve
High-Side
Panel Valve /
Oil Inject
Oil Drain Valve
ISV Pressure
Gauge
High-Side
Gauge
Display Screen
Menu Key
Up Arrow
Down Arrow
Start/Stop Key
Power Switch
Control Panel Descriptions
Low-Side Valve — controls the flow between the A/C system’s low side and the unit.
High-Side Valve / Oil Inject — controls the flow between the A/C system’s high side and the unit /
injects new oil into the A/C system.
Low-Side Gauge — shows the A/C system’s low-side pressure.
High-Side Gauge — shows the A/C system’s high-side pressure.
Display Screen — displays operational information.
Keypad — contains the following keys for performing specific functions:
MENU — chooses function options.
START/STOP — starts, stops, or exits a function.
UP/DOWN Arrows — adjusts operating parameters.
ISV Pressure Gauge — shows the pressure inside the internal storage vessel.
Oil Drain Valve — drains the A/C system’s oil into the oil drain bottle.
Recover/Recycle/Recharge Unit
5
Introduction
Component Identification and Location contd.
Symbol Definitions
The following is an explanation of the symbols shown on the control panel:
— Low Side — Oil Drain
— High Side — ISV Pressure
— Valve Open — Menu Key
— Valve Closed — Start/Stop Key
— Oil Inject
Software Functions
MAIN MENU :
RECOVER — recovers and filters refrigerant from the A/C system.
VACUUM — activates the vacuum sequence for a programmed amount
of time.
CHARGE — charges the A/C system with the programmed amount of
refrigerant.
DIAGNOSTICS MENU : use to view and edit unit settings.
UNITS — toggles displayed weight between kilograms (kg) and pounds
(lbs.).
REF — displays the approximate amount of refrigerant in the internal
storage vessel.
FILTER — displays the remaining capacity of the filter by weight.
OIL — displays the remaining time in minutes and seconds until the next
recommended vacuum pump oil change.
CALIBRATE— service technician uses to calibrate the weight scale.
EXIT— leaves the diagnostics menu.
6
CAUTION: To avoid damage to the unit, calibration must be performed
by a qualified service technician.
© 2006 SPX Corporation
Initial Setup
WARNING
This manual contains important procedures concerning the setup, operation, and
maintenance of the unit. Read and follow all the warnings outlined at the beginning
of this manual. Do not operate the unit until you have read and entirely understand
the contents of this manual. If you do not understand any of the contents of this manual,
notify your supervisor.
If the operator cannot read these instructions, all instructions and safety precautions must
be read and discussed in the operator’s native language.
Unpacking the Accessory Kit
Unpack the accessory kit from the bag and remove the plastic packaging. The
accessory kit consists of the following:
l R-134a couplers.
l Vacuum pump oil.
l Owner’s manual.
l Low-side tank adapter.
l Translation decal.
Placing the Translation Decal (optional)
The unit ships with a language chart on the control panel. An optional decal is
also provided, which lists other languages. If desired, remove the backing from
the translation decal, align it over the existing chart on the control panel, and
press it in place.
Recover/Recycle/Recharge Unit
7
Initial Setup
Adding Vacuum Pump Oil
Use the following steps to add oil to the vacuum pump.
IMPORTANT: For maximum unit performance, change the vacuum
pump oil after every 10 hours of operation.
CAUTION: The
vacuum pump is
shipped without
oil in the
reservoir. To
avoid pump
damage, add oil
before starting
the pump.
Oil Fill Port
Oil Sight Glass
INST0983 FH.eps
Vacuum Pump
CAUTION:
Avoid using 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.
1. Plug a user supplied power cord into the unit and then into a correct
voltage outlet.
2. Turn ON the power switch on the unit’s control panel.
3. Remove the plastic plug from the oil fill port.
4. Pour about 177 mL (6 ounces) of oil into the oil fill port.
5. On the control panel, verify both panel valves are open and the service
couplers are disconnected. The screen will display:
CLEAR 02.00
6. Press the Start/Stop key (
NOTE: At this time, the unit automatically evacuates all air from the unit.
) to start the vacuum pump.
8
© 2006 SPX Corporation
Adding Vacuum Pump Oil contd.
Initial Setup
7. With the vacuum pump running, slowly add oil until the level rises to
the center of the oil sight glass.
NOTE: The pump holds approximately 237 mL (8 ounces) of oil.
8. When the vacuum pump countdown reaches zero, the vacuum pump
stops, and the unit display changes to the recover function.
9. Replace the plastic plug in the oil fill port.
After adding oil to the vacuum pump, add refrigerant to the internal
storage vessel. Refer to the instructions on the next page.
Note: The unit’s
weight default is in
kilograms. To change
the default to pounds:
1. Press the Up and
Down arrow keys
at the same time.
UNITS KG
will be displayed.
2. Press the Up or
Down arrow key to
toggle to LBS.
3. Press the Menu
( ) key until the
display reads EXIT.
4. Press Start/Stop
( ) key to exit.
Recover/Recycle/Recharge Unit
9
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