Bosch ACS 653 Setup guide
en
Repair instruction
A/C Service Unit
ACS 653 - ACS 653-P - ACS 663 - ACS 663-P
ACS 663-RI
ACS 653, ACS 663 Service Manual
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© Robert Bosch GmbH
Robert Bosch GmbH
Franz-Oechsle-Straße 4
1119D-73201 Plochingen
SERVICE: [email protected]
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Carefully read all instructions.
Do not use in open air in case of rain or high humidity.
Wear gloves.
Wear protection goggles.
Alternating voltage.
Grounding protection.
Electrical shock hazard.
Safety signal words designate the degree, or level, of hazard seriousness.
: Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
: Indicates a potentially hazardous situation which, if not avoided, could result
in death or serious injury.
: Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury.
: Used without the safety alert symbol indicates a potentially hazardous situation which,
if not avoided, may result in property damage.
These safety messages cover situations Bosch is aware of. Bosch cannot know, evaluate, or
advise you as to all possible hazards. You must verify that conditions and procedures do not
jeopardize your personal safety.
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Beforeoperating
the machine, read and follow all 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, all operating instructions
and safety precautions must be read and discussed in the operator’s native language.
Using the machine in a manner for
which it was not designed will compromise the machine and nullify the protections provided.
Do not overll the internal
storage vessel (ISV), because overlling may cause explosion resulting in personal injury
or death. Do not recover refrigerants into a nonrellable container; use only type-approved
rellable containers that have a pressure relief valve.
Contact with
refrigerant may cause personal injury, including blindness and frozen skin. Wear protective
equipment, including goggles and gloves. Disconnect hoses using extreme caution.
Ensure the phase has been completed before disconnecting the machine to prevent the
release of refrigeration to the atmosphere.
Refrigerant
reduces the oxygen available for breathing, resulting in drowsiness and dizziness. Exposure
to high concentrations of refrigerant causes asphyxiation, injury to the eyes, nose, throat,
and lungs, and can aect the central nervous system. Use the machine in locations with
mechanical ventilation that provides at least one air change per hour. If accidental system
discharge occurs, ventilate the work area before resuming service.
Such a precaution
is necessary to prevent the possible presence of refrigerant in the working environment.
The refrigerant R1234yf (for ACS 663 only) is heavier than air and tends to concentrate
in the pits of the workshop.
do not use the machine in the vicinity of spilled or open
containers of gasoline or other ammable substances.
do not use an extension cordAn 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.
, do not use the machine in the vicinity of ames and
hot surfaces. Refrigerant decomposes at high temperatures, freeing toxic substances to
the environment which are noxious to the user.
, do not use the machine in environments containing
explosive gases or vapors.
Do not use this machine in ATEX classied zones
or areas. Protect the machine from conditions that may cause electrical failure or other
hazards relating to ambient interaction.
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Mixtures of air and refrigerant can be
combustible at elevated pressures. These mixtures are potentially dangerous and may
result in re or explosion causing personal injury and/or property damage.
Exposure may cause personal injury. Disconnect the power before servicing the
machine.
Disconnect the electrical supply before a long period of inactivity or before internal
maintenance is performed. To ensure that unauthorized personnel cannot run the machine,
use the Lockout / Tag Out feature.
(The machine is equipped with
special connectors to recover, recycle, and recharge only R1234yf ( ACS 663) or R134a
(ACS 653) refrigerant. Do not attempt to adapt the machine 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 machine and the vehicle air conditioning system.
Do not use refrigerants other than those indicated on the technical data plate. It is also
recommended to buy it from specialized companies that guarantee its good quality.
Protect the machine from conditions that may cause electrical failure or other hazards
relating to ambient interaction.
Position the machine far from
heat sources, such as direct sunlight which can cause excessive temperatures. The use
of this machine under normal environmental conditions (10°C to 50°C) keeps pressures
under reasonable limits. Make sure the machine does not exceed the operating temperature
indicated on the technical data plate.
.
Place the station on a at surface and in sucient lighting conditions; lock the front wheels
and do not subject them to vibration.
Further information regarding health and safety may be obtained from the refrigerant
manufacturer.
)To minimize the risk of ignition, the unit software guided leak check
is periodically performed otherwise the unit will lock. For same purpose, also hardware features
such as ventilation fan monitoring system, suitably located vents on cart bottom (R1234yf is
heavier than air) and sealed power switching circuits are present.
.
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.
The machine is equipped with the following protective devices:
• Over pressure valves.
• A maximum pressure switch stops the compressor when excessive pressure is sensed.
.
.
.
Door switch on service rear door disconnects electrical power to the unit when opened.
.
The machine includes parts subject to PED EU directive 2014/68/EU, Pressure Equipment
Directive. PED directive regulates all the pressurized part dening for them categories based on
volume-pressure ratio and based on uid refrigerant type. Those parts then have not to be anyhow
modied nor removed. Under the responsibility of the owner, the machine and parts falling in
the scope of PED shall be checked either during commissioning and periodically fullling local
country regulations and norms. Parts in the scope of PED are:
• Tank.
• Pressure relieve valve.
• High pressure switch.
• Recovery group.
• Piping.
Call Bosch service center to get technical specications for each part listed.
The unit should normally be moved on at surfaces with a maximum slope of 15 ° and on the four
wheels, avoiding excessive shaking. When stopped then the brake on the front wheels must be
inserted. On slightly irregular surfaces, the unit can be moved by keeping it slightly inclined and
grounded on the two rear wheels by making sure to have a rm grip on the rear handle.
.
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Repair of the ACS 653, ACS 663 may only be performed by service technicians, trained in
handling of refrigerants, personal protective equipment, refrigerant leakage prevention, handling
of charging, leak detection and proper disposal.
Service technicians must be trained and certified by Robert Bosch GmbH or its regional
representatives / subsidiaries.
If a service technician is already certied, he may train other employees in the organization
authorized by Robert Bosch GmbH in servicing the ACS 653, ACS 663.
For specific work, the service technician needs the following additional qualifications
(country-specic):
• Electrotechnical knowledge for working on electrotechnical systems and equipment
as per EN 50110-1 and EN 50110-2 (see accident prevention regulation for electrical systems
and equipment, e. g. DGUV V3 in Germany) and qualied in ESD protection measures.
• Knowledge of handling refrigerants according to F-Gas Regulation (EU) No 517/2014
and safety of refrigerating systems according to EN 378. Refer to your local regulations.
All warranty claims (personal injury, faulty equipment) are rendered null and void if the ACS 653,
ACS 663 is opened or modied by unauthorized individuals.
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Introduction
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Introduction
These units are designed to be compatible with existing service equipment and standard service
procedures. These machines utilize a single-pass system that meets specications for recycled
refrigerant. Follow recommended service procedures for the containment of refrigerant.
Each unit includes a high-vacuum pump for fast, thorough evacuation. The compressor rst pulls
the A/C system to -0.4 bar; the compressor then works with the vacuum pump to pull a vacuum
to an absolute pressure of less than 1.0 bar.
Refrigerant systems require special oils. Refer to the A/C system manufacturer’s service
manual for oil specications.
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1. Gauge low pressure (LP)
2. Printer (optional, standard on P variants)
3. Gauge high pressure (HP)
4. Identier Filter (for ACS 663-RI only)
5. Master switch
6. Power supply socket
7. Circuit breaker
8. UV dye bottle
9. Fresh oil bottle 2 (POE)
10.Fresh oil bottle 1 (PAG)
11. Oil drain bottle
12.Display and control panel
13.Flush port (high pressure*)
14.Flush port (low pressure*)
15.Service hose port (high pressure*)
16.Service hose port (low pressure*)
17.Contaminant recovery outlet port
(for ACS 663-RI only)
18. Front wheels with locking brake
19.Rear wheels
20.Hoses wraping support
21.2 x USB 2.0 slot
(*) max 25 bar (2.5 MPa)
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Introduction
moves selection of a
menu item to the previous item.
moves selection of
a menu item to the following item.
scrolls to next
screen.
scrolls to previous
screen.
(function keys)
to select the functions shown on
display (bottom icons).
Thecan be used to
enter letters, numbers and special
characters in the input boxes.
0...9
A...Z
supplies information
regarding charge capacity by vehicle
model.
activates a menu that
helps the user set up an automatic
recover / vacuum / leak test / charge
sequence.
activates the sequence
to recover refrigerant from the vehicle
A/C system.
activates the sequence
that pulls a deep vacuum on the
vehicle A/C system to remove air
and moisture.
activates the sequence
that charges the vehicle A/C system
with a programmed amount of
refrigerant.
displays information related to
the current display.
accesses additional functions
and parameters.
to move to the next screen
or step.
to return to the previous
screen or step.
to enable or disable the
selected function.
to confirm, proceed or save
settings.
to cancel the operation and
return to the previous function or the
Main menu.
to move menu selection upward.
to move menu selection
downward.
to perform a print (only for
variants with printer).
to erase the character
to the left of the cursor.
to pause a process.
to resume a paused process.
to repeat the last step.
to delete a selected entry
from the memory of the machine.
indicates that the WiFi
connection is enabled.
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Introduction
The machine launches into the initial Setup
mode (the rst time the machine is powered up).
It is needed to complete all the setup
procedure sequence before to use the A/C unit.
Carry out the following setup:
1. Language selection.
2. License agreement review.
3. Units (Metric/Imperial) selection.
4. Date and Time adjustment.
5. Edit Print Header.
6. Identier setting (except the RI and R134a
variants).
7. Service Vacuum.
8. Internal Tank Fill.
At the end of the initial setup procedure it is
suggested to:
• Perform air ow calibration (for R1234yf
only).
1. Call up the Main Menu.
2. Select icon.
3. Select icon.
• Select to access the following
functions.
Performs a pressure test on an A/C system of
a vehicle with a refrigerant already present.
To search the leaks of the A/C system of a ve-
hicle by means of an external bottle of Nitrogen
or a mixture of nitrogen and hidrogen.
Flushes residual oil from the machine to prepare
for the service of next vehicle.
Provides a method of removing oil and impurity
by forcing liquid refrigerant through an A/C
system or components of an A/C system. After
ushing, the refrigerant is recovered by the
machine and ltered by the recycling circuit.
Use this function to transfer refrigerant from a
source tank to the ISV. The tank ll value may
be adjusted up or down to suit the user’s needs.
Refer to “Tank Fill” in the Maintenance section.
The vehicle air conditioning
system being serviced.
Moisture and other incondensables
are removed from an A/C system by using a
vacuum pump.
The tank
designed specifically for this machine has
refrigerant disposable capacity of 17.4 kg,
except the ACS 653 has a disposable capacity
of 19.4 kg.
Model No. ACS 653 or ACS 663.
Different oil types in the vehicle
air-conditioning system depending on the
vehicle manufacturer.
Refrigerant is recovered
from an A/C system, ltered, and stored in the
ISV.
R134a (ACS 653) or R1234yf.
A disposable tank
of new refrigerant used to rell the ISV; not
included.
indicates that the
Bluetooth connection is enabled.
to set which side to charge
thru (high pressure, low pressure or
both sides).
to set the unit of measurement
(ml or oz).
to set the unit of measurement
(kg, oz or lb).
to export data onto a USB key.
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Introduction
Function to memorize the refrigerant amount
recovered and charged for every vehicle. The
display shows ve selection options:
√: to show data of recovered and
charged refrigerant.
√: to extract the report
with recovered and charged refrigerant
amount in the vehicle. Data extraction via
USB stick, recommended size 2 GB and
FAT format (support is not part of scope
delivery). Data are transferred as le.
√: to erase all data stored
on the machine.
√: to print all data stored
on the machine.
√: to disable the
Refrigerant tracking function.
)
To perform refrigerant identication. Follow the
instructions on the display.
• Select icon to return to the Setup
Menu.
• Select to access the following
functions.
Select a language for screen prompts. English
is the default language.
Program the machine to display metric or
imperial values. The default display is in a
metric system.
Program the machine for current date and time.
Programs information that will appear on the
printout each time a print function is used.
Failure to register and activate the machine
within 30 days of initial startup will cause the
machine to lock out and not function. Select
this Settings Menu item and follow the prompts
before the trial period expires.
To enable or disable the operation of the
exhausted oil scale.
To double or halve the default amount (about
7.5 ml) of UV dye.
To enable or disable the purity test of the
external refrigerant identier connected to the
USB port of the machine. The display shows
three selection options:
√:
Displays the steps required to perform the
purity test.
√:
Does not display the steps required to
perform the purity test.
√: Ask a
user, with a special message, to conrm
whether or not to perform the purity test.
Program the machine to change duration of the
vacuum leak test time.
Program the machine to turn the buzzer on or
o.
To upgrade the rmware through a USB stick or
via WiFi (with Bosch WiFi dongle - optional -).
The display shows ve selection options:
√: To check if new rm-
ware updates are available.
√: To upgrade the firmware
through a USB stick.
√: To upgrade the rmware
through a WiFi network. If the unit is con-
nected to WiFi network and the WiFi net-
work is connected to Internet, it will auto-
matically start searching for new updates.
√: to check or install
the firmware update of the Refrigerant
Identier, if available.
√: to check or
install the firmware update of the WiFi
dongle, if available.
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Introduction
To congure the WiFi connection to the machine.
The display shows ve selection options:
√: To search for
available WiFi networks.
√: To display some WiFi
connection data used.
√: to perform a WiFi
network connection test used by the
machine.
√: To disable
the WiFi network connection stored on the
machine.
√: to perform manual scan
and selection of WiFi network.
To enable or disable the asanetwork function.
For further information contact Customer
Service.
To enable or disable the CoRe function.
For more information see Connected Repair
[CoRe] chapter on the user manual.
Program the machine to change duration of the
N2 leak test time.
• Select icon to return to the Setup
Menu.
• Select to access the following
functions.
The lter removes acid, particulates, and moisture
from the refrigerant. To meet requirements, it is
mandatory to replace the lter after (SEE TABLE)
of refrigerant has been ltered.
Model
R134a
Replacement lter at: 68 kg
(alert 56 kg)
Model
R1234yf
Replacement lter at: 150 kg
(alert 138 kg)
This menu item displays the filter capacity
remaining until the machine locks down and no
longer functions. Refer to “Filter Maintenance”
in the Maintenance section.
Displays the amount of time remaining until
the next vacuum pump oil change is needed.
For maximum vacuum pump performance,
change vacuum pump oil every time the lter
is replaced. Refer to the “Vacuum Pump
Maintenance” in the Maintenance section.
Displays internal storage vessel (ISV) pressure
and temperature. It is used to eliminate
incondensables gas and helps to limit the
pressure in the ISV.
Use to verify internal scale calibration. Refer to
“Calibration Check” in the Maintenance section
of this manual.
To reset the exhausted oil scale to zero.
To activate or deactivate the pressure values
display of the machine.
Displays the revision level of the software in
the unit.
Performs double test (in vacuum and pressure)
to detect any leakage on the machine.
For service center use only.
For production use only.
To perform the air ow calibration. Refer to
“Calibrate Air Flow” in the Diagnostics and
Testing section.
• Select icon to return to the Setup
Menu.
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Introduction
Do not use abrasive cleaning agents, solvents
(petrol, diesel, etc.) and coarse workshop cloths
to clean the machine. Clean only using a soft
cloth and neutral cleaning agents.
In cases of refrigerant leaks, such
as during installation, maintenance or repair
of machine, or even during normal use after
machine rest, there will be no refund by the
manufacturer.
.
The machine is equipped with a circuit breaker
to the side of the machine below the ON/OFF
switch. If the breaker trips, its button will pop
out. A tripped circuit breaker will cause the
machine to lose all power. Press the circuit
breaker button to reset. If the circuit breaker
does not reset or continues to trip, there is a
fault in the unit electrical system. Troubleshoot
and repair the aected component(s).
This menu (available on Function menu) is
used to transfer refrigerant from a source tank
to the ISV.
1. Call up the Main Menu.
2. Select icon.
3. Select icon.
4. Select from the Functions
Menu. The machine displays:
FILL AMOUNT: xx.xxyy
RECOVER CAPACITY: xx.xxyy
CHARGE CAPACITY: xx.xxyy
5. Enter the ll amount (at least 5 kg) to ensure
enough liquid refrigerant is available for
charging and select icon. Unit is set
with 2.2 kg dead space (rst 2.2 kg are not
shown on display anymore). If the source
tank is empty, or has insucient refrigerant
for transfer, tank ll will stop.
6. Connect the low pressure service hose (blue)
to the liquid connector on a full source tank.
7. Position the source tank in such a way
that liquid refrigerant is supplied to the
connection. Open the source tank valve.
8. Select icon to start the tank ll process.
9. The machine (for ACS 663-RI only) checks
the refrigerant in the source tank to verify
it is R1234yf and not contaminated.
The machine displays the following screens:
INITIALIZING REFRIGERANT IDENTIFIER
ANALYZING REFRIGERANT SAMPLE
REFRIGERANT PURITY PASSED
10.The machine begins filling the internal
storage vessel (ISV) and automatically
stops when the preset tank fill level is
reached. To stop the tank fill before the
preset level is reached, select icon.
1
11. Close the liquid valve and remove the hose
from the source tank.
12. Select icon to return to the Function Menu.
1. If the machine displays
REPLACE IDENTIFIER FILTER
• the refrigerant identifier filter must be
replaced. Select icon to conrm, and
refer to the “Internal Refrigerant Identier
Maintenance” in this section.
2. If the machine displays
REFRIGERANT PURITY FAILED
RECOVER CONTAMINATED
REFRIGERANT FROM SYSTEM AND HOSES
• the refrigerant in the source tank is
either not R1234yf or it is contaminated.
In either case, it should not be added to
the internal storage vessel in the machine.
The refrigerant purity is 95%.
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Introduction
The lter is designed to trap acid and particulates,
and to remove water from refrigerant. To meet
this mandate, the lter must be replaced after
(SEE TABLE) of refrigerant has been ltered.
The unit gives a warning when (SEE TABLE) of
the lter capacity has been used; the unit locks
down when the
(
SEE TABLE) lter capacity has
been reached and will no longer function.
1. Call up the Main Menu.
2. Select icon.
3. Select icon.
4. Select from the
Maintenance Menu or when the machine
prompts. The machine displays:
REMAINING FILTER CAPACITY: XXX.XYY
REPLACE FILTER NOW?
• The machine displays amount of filter
capacity remaining until the machine
locks down. This message may occur at
anytime during the course of an A/C system
maintenance action.
5. Select icon to change the lter; Select
icon to resume using the machine.
1. If icon was selected to change the lter,
the unit will clear the lter, then prompts for
the new lter code to be entered:
ENTER NEW FILTER SERIAL NUMBER
If SERIAL NUMBER WRONG is
displayed, the serial number has been incorrectly
entered or the lter has already been used in this
machine.
2. Use the keypad to enter the serial number
that appears on the new lter and select
icon to continue.
• The machine clears the existing lter and
displays:
TURN POWER OFF
AND REPLACE FILTER
1
3. Switch o the machine.
4. Open the service rear door.
5. Remove the old filter (1) by turning it
counterclockwise. Refer to Figure 1-4.
6. Look at the new lter. Verify both O-rings
are lubricated and correctly located in the
grooves as shown in Figure 1-5.
7. Install the new filter by threading it
clockwise into place. Verify the filter is
positioned correctly. Tighten the filter to
20 Nm ± 1.
8. Close the service rear door.
9. Switch on the machine.
10.Machine starts with vacuum pump oil
change (Refer to the “Vacuum Pump
Maintenance” in this section).
11. Recycle the lter that was removed from
the machine according to the laws in your
jurisdiction.
.
Model
R134a
Replacement lter at: 68 kg
(alert 56 kg)
Model
R1234yf
Replacement lter at: 150 kg
(alert 138 kg)
O-rings
• Connect a second recovery machine to
the tting (1) located on the side of the
machine. See Figure 1-3. Run a recovery
to remove the refrigerant sampled by the
refrigerant identier in the machine.
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Introduction
Vacuum pump oil must be changed with
every lter change, every 100 hours pump runs
or more often as necessary.
1. Call up the Main Menu.
2. Select icon.
3. Select icon.
4. Select from the
Maintenance Menu or when prompted.
The display shows how long the vacuum
pump has operated since the last oil change.
REMAINING OIL LIFE XXX:XX (hhh:mm)
CHANGE OIL NOW?
5. Select icon to change vacuum pump oil.
6. If the the machine displays:
WARMING OIL FOR DRAIN
• allow the vacuum pump to run for two
minutes to warm up the oil.
7. If the oil is already warm, the display shows:
DRAIN USED OIL FROM PUMP AND REPLACE
WITH 550 ML OF NEW OIL REMOVE CAP TO
SPEED DRAINING OF OIL
8. Switch o the machine.
9. Open the service rear door.
10.Slowly open the oil ll port cover (2) to verify
there is no pressure in the machine. Then
carefully remove the cover. See Figure 1-7.
11. Remove the oil drain fitting cap (3) and
drain the oil into a suitable container for
disposal. Reinstall the oil drain cap (3) and
close tightly.
A refrigerant identifier samples refrigerant
going into the ISV to verify it is R1234yf and
not contaminated. Replace the sample hose
assembly during every lter change and also if
prompted by an error message saying the hose
is clogged. See Figure 1-6.
1. Switch o the machine.
2. Open the service rear door.
3. Remove the rear cover (above the service
door) by pushing it up and extract it by
pulling it out.
4. Disconnect the existing sample hose
assembly (2) between the rear side of the
manifold and the refrigerant identier, and
install a new sample hose assembly. If the
lter is any color but white, the lter must
be replaced.
5. Pull the lter barbs from the rubber hoses.
Snap the lter (1) out of the clip.
6. Install a new lter (lter arrow in the same
direction as shown on the refrigerant
identier). Do not kink the rubber hoses.
Push the rubber hoses back into the
refrigerant identier housing until they are
straight.
7. Insert the rear cover so that the 4 holes on
the sides the cover t into the 4 clips on the
machine. Push down to hook the rear cover.
8. Close the service rear door.
12
Flashing Red Warm up phase
Solid Blue Warm up phase completed
Flashing Blue Calibration in progress
Alternating Blue and Green Calibration OK, ready for
measurement
Alternating Blue and Red Calibration failed
Flashing Yellow Measurement in progress
Alternating Yellow and
Green
Measurement completed,
passed
(displayed for max. 10 sec)
Alternating Yellow and Red Measurement nished,
not passed
(displayed for max. 10 sec)
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Introduction
12. Slowly add vacuum pump oil to the pump
through the oil ll port until the oil reaches
the center of the sight glass (1)
.
13.Reinstall the oil ll port cover (2) and close
tightly.
14.Close the service rear door.
15.Switch on the machine.
16.Select icon to continue.
17.The display show a message that indicate
to the user to check that the oil level is at
the center of the sight glass pump.
In case it is necessary to add more oil,
repeat steps 8, 9, 10, 12, 13, 14 and 15 for
add oil.
18. Select icon to return to the Maintenance
Menu.
.
Review the laws and regulations in
your jurisdiction to determine correct disposal
procedures for pump oil. It is the responsibility
of the user to determine if a material is a
hazardous waste at the time of disposal.
The user must ensure compliance with all
applicable laws and regulations.
1
3
2
To make changes to the printer text (available
in Setting menu) appearing in the header on
each printout:
1. Call up the Main Menu.
2. Select icon.
3. Select icon.
4. Select in the Settings
Menu. The cursor is in the rst eld.
5. Update the text by using the arrows and the
multi-tap interface on the numeric keypad:
icon acts as a backspace
key.
or arrow moves the cursor to the
right or to the left.
(0) key also acts as a spacebar.
and arrows navigate between
the rows.
6. Select icon to save the changes and
return to the Settings Menu.
7. Select icon to exit and return to the
Settings Menu.
To install a new paper roll in the printer:
1. Remove the cover on the printer by pulling
out on the tab (2) as shown in Figure 1-8.
2. Remove the paper core.
3. Install the new roll of paper with the end of
the paper at the top of the roll.
4. Assemble the cover onto the printer with the
leading edge of the paper over the roller (1).
1
2
ACS 653, ACS 663 Service Manual
SP00D00624 2021-04-08Robert Bosch GmbH 19
Introduction
This function is used to ensure the machine’s
internal scale is always calibrated. To perform
this check make use of Bosch calibration kit
(optional) including sample weight and magnet.
First time magnet must be installed.
1. Verify the magnet on the bottom of the
machine is clean. Refer to Figure 1-9.
2. Call up the Main Menu.
3. Select icon.
4. Select icon.
5. Select from the Mainte-
nance Menu. The machine displays:
PLACE CALIBRATION WEIGHT ON MAGNET
LOCATED ON THE BOTTOM OF MACHINE
6. Attach the calibration weight to the magnet
(1) on the bottom of the machine.
7. Select icon to continue.
.
The machine displays:
REMOVE CALIBRATION WEIGHT
FROM MAGNET LOCATED ON THE BOTTOM
OF MACHINE
8. Remove calibration weight from magnet
located on the bottom of machine.
9. Select icon to continue.
• If the display shows
the scale is calibration. Select icon to
return to the Maintenance Menu.
• If the display shows the
scale is out of calibration. Select
icon to retry. If calibration continues to fail,
contact an authorized service center for
assistance.
1
This procedure should be repeated at regular
intervals, as it allows to correct any zero osets
in the oil drain scale.
1. Call up the Main Menu.
2. Select icon.
3. Select icon.
4. Select from the
Maintenance Menu.
5. Select the oil drain scale and conrm with
icon.
6. The display shows the message to remove
the oil drain tank.
7. Carefully remove the bottle shown on the
display.
To remove the oil drain tank, it is
sucient to pull it out straight.
8. Select icon to conrm and reset the
scale.
9. The scale is reset to zero.
ACS 653, ACS 663 Service Manual
SP00D00624 2021-04-08 Robert Bosch GmbH
20
Introduction
This function is available on Maintenance menu.
To ensure a safe, environmentally friendly,
and economic operation, the unit performs a
software-controlled self-test in regular intervals
every 10 days (for R1234yf only).
1. Follow the on-screen prompts to connect
the hose service couplers to the storage
connectors on the side of the machine.
Open the hose couplers by turning the
collars clockwise.
2. Select icon to start the test.
3. The machine performs a self-recovery and
displays:
RECOVER IN PROGRESS
4. The machine performs a 30-second vacuum
test and displays:
VACUUM CHECK IN PROGRESS
• If the vacuum test fails, the machine will
prompt to check for leaks.
5. Once the machine passes the vacuum test,
a controlled pressure is applied to its internal
components. The machine displays:
PRESSURE CHECK IN PROGRESS
6. Pressure is held for five minutes and
monitored for decay. There is not a default
pressure value. The machine monitors the
pressure reached during the pressurization.
Minutes and seconds count down on the
display.
• If an acceptable pressure decay is detected,
the machine recovers refrigerant until
-0,44 bar and returns to the Maintenance
Menu, ready for normal operation.
• If an unacceptable pressure decay is
detected, the machine will prompt to
check for leaks. Take the machine to an
authorized service center for repair.
Leak Check may also be selected at
any time from the Maintenance Menu. If you
decline to run the Leak Check when prompted,
the machine will continue to prompt for the test
at each power-up until the test is completed
(for R1234yf only).
Never leave the machine live if an immediate use
is not scheduled. To ensure that unauthorized
personnel cannot run the machine, use the
Lockout as shown in Figure 1-10.
1. Turn the Lockout lever (1) counterclockwise
(CCW).
2. Insert a padlock or other item through the
aligned holes so the lever cannot be turned
clockwise (CW) to start the machine.
1
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This manual suits for next models
4
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