Wow Coolius 4000 Bus User manual

Automatic A/C-Service Unit
1
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
Automatic A/C
Automatic A/CAutomatic A/C
Automatic A/C-
--
-Service Unit
Service UnitService Unit
Service Unit
Coolius 4000 Bus
Coolius 4000 BusCoolius 4000 Bus
Coolius 4000 Bus
Art.
Art.Art.
Art.-
--
-No.
No. No.
No. 0900700605
09007006050900700605
0900700605
Instruction manual
Instruction manualInstruction manual
Instruction manual
WOW! GmbH Künzelsau reserves the right to discontinue, or change at any time specifications or designs
without notice and without incurring obligations according to her policy of always improving her products.

Automatic A/C-Service Unit
2
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
CONTENTS
Layout drawing .......................................................................................................................5
Electric scheme ......................................................................................................................9
Legend...................................................................................................................................10
1. Introduction to Coolius 40000 BUS recovery unit ......................................................12
1.1 Technical specifications................................................................................................................... 12
2. Components description and standard equipment....................................................12
2.1 High vacuum pump ......................................................................................................................... 12
2.2 Refrigerant charging pump.............................................................................................................. 12
2.3 Refrigerant bottle............................................................................................................................. 12
2.4 Distiller - separator.......................................................................................................................... 13
2.5 Compressor .................................................................................................................................... 13
2.6 Filters.............................................................................................................................................. 13
2.7 Flexible hoses................................................................................................................................. 13
2.8 Quick coupler valves....................................................................................................................... 13
2.9 Printer............................................................................................................................................. 13
2.10 Temperature probe ......................................................................................................................... 13
2.11 Control module................................................................................................................................ 13
2.12 Functions programming................................................................................................................... 13
2.13 Functions that can be performed..................................................................................................... 14
3. Control panel..................................................................................................................15
3.1 Description of the control keys......................................................................................................... 15
4. Preparing the unit Coolius 4000 BUS for operation..................................................16
4.1 Checking the vacuum pump oil level................................................................................................ 16
4.2 Unlocking the scale......................................................................................................................... 16
4.3 "Zero" scale check .......................................................................................................................... 17
4.4 Filling refrigerant into the bottle ....................................................................................................... 17
4.4.1 Filling refrigerant into the internal bottle by means of recovery from the service bottle...................... 17
4.4.2 Emptying the internal bottle............................................................................................................. 19
5. Recovery ........................................................................................................................20
5.1 Preparing the vehicle for refrigerant recovery from the A/C system.................................................. 20
5.2 Refrigerant recovery for R= all......................................................................................................... 20
5.3 Refrigerant recovery for R<>00.00................................................................................................... 21
6. Draining of the oil extracted from the A/C system......................................................22
7. Evacuating and checking the A/C system for tightness ............................................22
8. Refilling oil into the A/C system...................................................................................23
8.1 Warning .......................................................................................................................................... 23
8.2 Warning .......................................................................................................................................... 23
8.3 Oil refilling procedure in the A/C system.......................................................................................... 23
8.4 Suggested oil quantities for refilling the vehicle air conditioner......................................................... 24
8.5 Warning .......................................................................................................................................... 24
8.6 UV refilling procedure in the A/C system.......................................................................................... 24
9. Charging refrigerant into the A/C system................................................................25
9.1 Warning .......................................................................................................................................... 25
9.2 A/C system refrigerant charging procedure...................................................................................... 25
10. Checking the A/C system operating pressures.......................................................25
11. FLUSHING automatic function..................................................................................26
12. FIRE&GO automatic function....................................................................................26
13. AUTO function............................................................................................................27
14. Operations before disconnecting the unit from the A/C system ...........................27

Automatic A/C-Service Unit
3
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
15. Routine maintenance.................................................................................................28
15.1 Material for routine maintenance ..................................................................................................... 28
15.2 Periodic operations ......................................................................................................................... 28
15.3 Changing the vacuum pump oil ....................................................................................................... 28
15.4 Replacing the filter driers................................................................................................................. 29
16. Accessories and spare parts ....................................................................................30
17. Dimensions and weight.............................................................................................30

Automatic A/C-Service Unit
4
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
WARNING
Safety precautions
a) This equipment is designed for trained personnel only, who must know the
refrigeration fundamentals, cooling systems, refrigerants and
possible damage that pressurized equipment may cause.
b) Carefully read the instructions contained in this manual; strict
observance of the procedures described is fundamental to the operator’s
safety, the perfect state of the unit and constant performances as
declared.
c) Do not operate the unit with different refrigerant than the one it has
been designed for.
d) Before performing any operation, make sure that the hoses used for
connections have been previously evacuated and that they do not
contain non-condensable gases.
e) Avoid skin contact; the low boiling temperature of the refrigerant (about -30°C)
can cause freezing.
f) Avoid breathing refrigerant vapours.
g) It is recommended to wear suitable protections like safety glasses and
gloves; contact with refrigerant may cause blindness and other personal
injuries.
h) Do not operate near open flames and hot surfaces; the high temperatures
decompose the refrigerant releasing toxic and caustic substances which
are hazardous for the operator and the environment.
i) Always make sure that the unit is connected to a suitably protected mains
supply provided with an efficient earth connection.
j) Before performing maintenance operations or when the unit will not be used
for a long period of time, turn the unit off by turning the main switch to 0
and disconnect the power supply cord; absolutely follow the
sequence of operations.
k) Operate the unit only in locations with suitable ventilation and a high
number of air changes.
l) Before disconnecting the unit, make sure that the cycle has been
completed and that all valves are closed in order to avoid release of
refrigerant to the atmosphere.
m) Never fill any tank with liquid refrigerant to more than 75% of its maximum
capacity.
n) During operations avoid release of refrigerant to the environment; this
precaution is required by international environmental standards and is essential to avoid
difficult leak detection in a refrigerant polluted environment.
o) The equipment must always work under the operator’s control.
p) Protect the unit from dripping.
q) Do not modify the calibration of safety valves and control systems.
r) If you recover refrigerant from a cooling system equipped with a water
evaporator and/or condenser, it is necessary to drain water from the
evaporator and/or condenser or to keep the circulation pump running
during the entire recovery operation in order to avoid frosting.

Automatic A/C-Service Unit
5
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
Layout drawing

Automatic A/C-Service Unit
6
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG

Automatic A/C-Service Unit
7
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG

Automatic A/C-Service Unit
8
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
Hydraulic diagram

Automatic A/C-Service Unit
9
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
Electric scheme

Automatic A/C-Service Unit
10
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
Legend
1
-
EV1
Solenoid valve on oil draining line
60
Electronic card on control panel
2
-
EV2
Solenoid
valve on recovery line
61
Paper for printer
3
-
EV3
Solenoid valve on UV charging line
62
Black plastic basin
4
-
EV4
Solenoid valve on vacuum pump suction line
64
Electronic card power with cables
5
Condenser
65
Right panel
6
Vacuum pump
66
Left panel
7
Recovery compressor
67
Main p
ower switch
8
Fan
68
-
M1
Low pressure gauge
10
-
EV10
Solenoid valve on vacuum test line
69
-
M2
High pressure gauge
12
Warning light
71
-
PRT
Printer
13
-
EV13
Solenoid valve on refrigerant charging line
72
-
MC
M
emory card
15
Pressure / vacuum switch
74
–
CEL3
OIL injection load cell - 5kg
17
Safety switch
75
–
CEL2
OIL drain load cell
-
5kg
18
Vacuum switch
76
-
R14
Heater on the refrigerant bottle
19
-
EV19
Solenoid valve on oil charging line
77
–
CEL4
UV injection load cell - 5kg
20
-
EV20
Solenoid valve on oil return line to compressor
78
-
S2
Refrigerant bottle service connection
21
Refrigerant charge hose
-
Pump liquid suction
79
-
VS1
Safety valve
–
non condensable gases
22
–
EV22
Solenoid valve on recovery line (2° line)
80
–
CEL1
Load cell - 100kg
23
Valve on the refrigerant bottle
81
-
CV5
Check valve on oil charging line
24
Bottle service valve
82
-
CV1
Check valve on suction line
25
Connecting hose between bottle assembly and
bottle
83
-
C
V3
Check valve on refrigerant charging
line
27
Bottle pressure gauge
84
-
CV6
Check valve on UV charging line
30
Electrical box
85
-
S1
Compressor service connection
31
Refrigerant bottle
86
-
CV4
Check valve on oil draining line
34
UV injection capillary tube
87
-
R5
Heater on the distiller
35
Oil injection capillary tube
88
-
CV2
Check valve on compressor discharge
line
39
Bottle pressure gauge capillary tube
89 (1
-
2)
Oil discharge capillary tube
40
Vacuum tube
90
-
F2
Filter drier
41
Compressor suction side hose
91
-
EV24
Solenoid valve – LOW line
42
Distiller - filters hose (1° line)
92
-
EV25
Solenoid valve – HIGH line
43
Distiller – separator hose (1° line)
93
LP gauge connection capillary tube
44
Double nut
94
HP gauge connection capillary tube
45
Compressor lubricant distiller
95
-
F1
Filter drier
48
Oil drain bottle
96
Safety valve connection capillary tube
49
UV dosimeter
97
Safety valve – non condensable gases
50
Oil dosimeter
100
Valve on the refrigerant bottle in
charging line
51
Heater switch
101
-
CV2
1
Check valve on compressor suction
line (2° line)
52
High pressure service hose
102
Distiller
–
separator
(2° line)
53
Low pressure service hose
103
–
F21
Filter drier
(2° line)
54
Main power cable
104
–
F22
Filter drier (2° line)
55
High pressure connection valve
105
–
S11
Compressor service connection (2°
line)
56
Low pressure connection valve
106
–
EV40
Solenoid valve on oil return line to
compressor (2° line)
58
Temperature probe
107
Recovery compressor (2° line)

Automatic A/C-Service Unit
11
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
108
Comp
ressor lubricant distiller
(2° line)
123
Central wheel
109
–
CV22
Check valve on compressor discharge line (2°
line)
124
Front swivel wheel
110
Condenser (2° line)
125
Compressor suction hose (2° line)
111
Fan (2° line)
129 (1
-
2)
Connecting hose between condenser
and bottle
112
–
EV21
Solenoid valve on oil draining line (2° line)
130
Connecting hose between distiller and
condenser (1°line)
113
–
CV24
Check valve on oil draining line (2° line)
131
Connecting hose between distiller -
condenser (2° line)
114
Manual oil discharge valve on distiller (1° line)
132
Distiller suction line hose (2° line)
115
Manual oil discharge valve on distiller (2° line)
133
Connecting hose between distiller -
filter (2° line)
116
Electrical motor for Refrigerant charge pump
135
Vacuum pump oil discharge
117
Safety pressure switch on refrigerant charging
line
136
Vacuum pump sight glass
118
Refrigerant bottle service connection (Vapour
side)
137
Vacuum pump plug
119
–
R25
Heater on the distiller (2° line)
140
Connecting hose between positive-
displacement pump and valves
assembly
121
Distiller suction line hose (1° line)
141
Refrigerant charge pump
122
Rear wheel with brake
143
Connecting hose between valves
assembly and input valves

Automatic A/C-Service Unit
12
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
1. Introduction to Coolius 4000 BUS recovery unit
Coolius 4000 BUS unit permits quick and efficient recovery of refrigerant from the A/C system,
refrigerant recycling, system evacuation, check for tightness, additive or lubricant injection, the
subsequent charge with refrigerant, measurement of the operating pressures.
Coolius 4000 BUS unit permits the control of all the functions by means of 4 electronic scales, which
control respectively: oil discharged from the A/C system, refrigerant charge, oil charge and additive
charge.
1.1 T ECHNICAL SPECIFICATIONS
Coolius 4000 BUS model R134a refrigerant
Maximum storage capacity 40 kg
Refrigerant reserve 4 kg
Maximum recovery rate 0,8 kg/min
Maximum refrigerant charging rate 4÷5 l/min
Oil maximum capacity 500 g
Oil reserve 50 g
Additive maximum capacity 200 g
Additive reserve 30 g
Power supply 230/1/50
Power input 1400 W
Storage temperature -10 ÷ +50 °C
Ambient temperature 0 ÷ 40 °C
Degree of protection IP24
Noise level < 70dB (A)
Maximum refrigerant charge
The maximum refrigerant quantity available for charging is calculated by subtracting 4 kg from
the weight of the refrigerant contained in the bottle and indicated on the display
max kg for charging = kg in bottle - 4 kg
Model Connections
Coolius 4000
BUS
3/8” sae with quick coupler valves
2. Components description and standard equipment
2.1 H IGH VACUUM PUMP
Essential component for extracting from the cooling system the residues of technical gases used for
pressing, ambient air and vapour contained in it as well as water possibly formed through vapour
condensation.
The high vacuum pump the unit is equipped with is rotary vane type, lubricated by oil injection. It is dual
stage and has a swept volume of 180l/min.
2.2 R EFRIGERANT CHARGING PUMP
Rotary gear pump enables to have high refrigerant charging rates
2.3 R EFRIGERANT BOTTLE
Maximum capacity kg 40
Weight of empty bottle kg 19
It is provided with two connections, one of which with tube (liquid refrigerant) and one without tube
(vapour refrigerant), safety valve, non-condensable gas purge and heater belt with thermostat.

Automatic A/C-Service Unit
13
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
2.4 D ISTILLER - SEPARATOR
Single body construction, featuring:
- distillation chamber with automatic flow control
- separating chamber for the oil removed from compressor, provided with a device for automatic return at
the end of the cycle
- heat exchanger chamber outlet gas / recovered refrigerant
2.5 C OMPRESSOR
The compressor is of the hermetic type.
2.6 F ILTERS
Each anti-acid filter drier has a water absorption capacity of 40 g.
2.7 F LEXIBLE HOSES
Their flexibility assures easy connection in any situation. They withstand A/C system operating
pressures and maintain their passage section even when operating in vacuum.
Coolius 4000 BUS unit features hoses with quick coupler valves.
2.8 Q UICK COUPLER VALVES
Mounted on the hose ends and provided with a coloured operating ring (blue = low pressure, ref. 56; red
= high pressure, ref. 55) for quick identification.
2.9 P RINTER
The printer allows to print on standard paper with a chart size of 57mm width a report with the values
programmed by the operator and executed by the unit, with the possibility to re-print the report.
2.10 T EMPERATURE PROBE
The unit is equipped with a temperature probe (with range from -10°C to +50°C), which allows to check
the ambient temperature at any time. The probe is equipped with a 2,5mt long cable.
2.11 C ONTROL MODULE
When the unit is turned on (PWR switch to position I), the display shows:
•The quantity in kg of refrigerant container in the bottle (see 1.1 “Technical specifications”)
•the quantity (in grams) of oil contained in the container
•the quantity (in grams) of additive contained in the container
•the temperature of the probe connected to the equipment
Thanks to the microprocessor and the 4 electronic scales, Coolius 40000 BUS unit is completely
computerized and controlled by means of the keyboard located on the upper panel.
Coolius 4000 BUS unit is provided with a large size display to allow for good reading even with bad
illumination; the 4-line display (with 20 characters each) allows the reading of the parameters connected
to the selected function and, if necessary, it indicates the operating or functioning alarms.
2.12 F UNCTIONS PROGRAMMING
By pressing the function keys, the display will show the screen where you can modify the values. The
display gives all necessary explanations to be able to perform this operation.
The values can be modified by means of the number keyboard (and in this case the value entered must
be confirmed with the ENTER key) or of the UP/DOWN key. In both cases, after modification, the display
will indicate the key to press in order to start the function .

Automatic A/C-Service Unit
14
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
It is possible to modify the refrigerant charge by means of the keyboard or using the DATABASE of the
unit.
2.13 F UNCTIONS THAT CAN BE PERFORMED
a) Coolius 4000 BUS unit allows to perform the functions singly one after the other, being able to
modify the relevant values
b) Coolius 4000 BUS unit allows to have a completely automatic programme, called AUTO, controlled
by the operator, with the following functions
•Refrigerant RECOVERY
•RECOVERY TEST
•DISCHARGE of OIL recovered from the system
•VACUUM and VACUUM TEST
•OIL CHARGE
•UV CHARGE
•REFRIGERANT CHARGE
c) If the operator does not want to perform a function, he must set a value of 0.0 during programming.
d) Coolius 4000 BUS unit allows to have a programme called FIRE & GO, with which the unit will
perform automatically the same functions as the ones in the AUTO programme; the only exception
is that only the refrigerant charge value can be modified.
e) Coolius 4000 BUS unit allows to perform the A/C system flushing with R134a. By pressing the
START key, the unit will perform the following functions automatically:
•VACUUM and VACCUM TEST (this function is performed only at the first cycle)
•SYSTEM FLOODING
•REFRIGERANT RECOVERY
•OIL DISCHARGE ( this function is performed at the first and last cycle)
f) Should there be an alarm signal during any automatic or single function, the function will stop and
the alarm message will be stored on the display.

Automatic A/C-Service Unit
15
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
3. Control panel
The upper panel of the unit contains all control elements needed for operation, checking for tightness
and measuring the A/C system operating pressures.
fig.1
3.1 D ESCRIPTION OF THE CONTROL KEYS
oRef. 11: when pressed, they enhance the function to perform or to modify. From the left, you will find the
following functions: RECOVERY/RECYCLING, VACUUM, OIL CHARGE, UV CHARGE,
REFRIGERANT CHARGE, FLUSHUNG, FIRE&GO, AUTO
oThe numeric keys ref. 16 allow to modify the values of the functions to perform
oThe UP / DOWN key ref. 89 allows to modify the values of the functions to perform
oThe ENTER key ref. 98 must be used to confirm the modified values
oThe MENU key ref. 22 is used to see the pages of the unit’s inside values on the display (ref. 28):
•PRINT PLATE: by typing the car’s number plate on the numeric keys (ref. 16), the
number plate will be printed on the report at the end of the functions
•LANGUAGE: it is possible to modify the unit’s language, by typing the corresponding
number appearing on the display
•DATABASE UPDATE: allows to update data
•DATE AND HOUR: allows to modify the date and hour mentioned on the printed report
•SCALES CALIBRATION: must be used each time the operator wants to re-calibrate one
of the four scales
•SERVICE: constants that are inside the unit and are protected by PASSWORD
1. PASSWORD 2006 allows to modify the print heading of the report
2. PASSWORD 5011 allows to reset the counters concerning maintenance
3. PASSWORD 9376 allows to reset simultaneously the 4 scales

Automatic A/C-Service Unit
16
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
oSTART/STOP key, ref. 26: used to start or stop the unit’s functions
oRef. 72: space used for the introduction of the MEMORY CARD
oRef. 27: pressure gauge for pressure inside the bottle
oRef. 14: used to reprint the final report
oRef. 12: alarm LED that lights up every time a function or a value are not regular
oRef. 71: Printer
4. Preparing the unit Coolius 4000 BUS for operation
WARNING
The presence of the synoptic sticker does not exempt the operator from carefully reading this manual and strictly
observing the described procedures
4.1 C HECKING THE VACUUM PUMP OIL LEVEL
Before checking the oil level, the unit must be placed on a level surface and its power supply must be
turned off.
Check that the vacuum pump oil level covers half of the sight glass (see drawing on page 28).
4.2 U NLOCKING THE SCALE
WARNING
If the following procedure is not performed, correct operation of the unit will be completely compromised.
Always empty the internal bottle before performing the tare (see 4.5.2)
Loose the 4 plastic knobs situated under the unit’s basis until standstill.
The 4 plastic knob must be screwed again until standstill before any move for which important
oscillations of the unit are expected.
Plastic knobs

Automatic A/C-Service Unit
17
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
4.3 "Z ERO " SCALE CHECK
After having unlocked the scale:
a) Connect the unit to the power supply
b) Turn the 67 switch to position
c) Make sure that the bottle is empty
d) Wait at least 5 minutes so that the bottle/scale assembly stabilizes before proceeding; The display
must show a value between 00.00 e00.50. If the value is lower or higher than the above indicated
one, the scale must be reset by acting on the electronic control module as follows:
e) Press the MENU key: the screen with the different functions that can be performed will appear on
the display
f) Press the key 6on the control module and select, with the relevant key, the scale to re-calibrate.
g) Carefully follow the instructions that appear on the display
h) At the end of the re-calibration operations, press the C/EXIT key
4.4 F ILLING REFRIGERANT INTO THE BOTTLE
When all the above mentioned preliminary operations have been performed, the recommended quantity
of about 10÷ 12 kg of refrigerant must be filled into the unit, The recommended quantity enables the
refrigerant recovery from the A/C system and its following charge.
4.4.1 F ILLING REFRIGERANT INTO THE INTERNAL BOTTLE BY MEANS OF RECOVERY FROM THE
SERVICE BOTTLE
a) Connect the unit to the power supply
b) Make sure that all valves on the control panel are closed and that the 67 switch is in position 0
c) Position the service bottle so that liquid refrigerant will come out (bottle with tube upright,
bottle without tube upside down)
d) remove the 55 quick coupler valve (red valve) from the 52 high pressure hose or use the
suitable adapters
e) Connect the 52 hose to the service bottle
f) Turn the 67 switch to position I
g) Push the Vkey: the led starts blinking and the set vacuum time appears on the display (to
modify the set values – see 2.10 "Control module").
h) Press the START key in order to start the vacuum cycle. The display will show:
•VACUUM TIME
•REMAINING TIME
i) Leave the vacuum pump running for about 5 minutes
j) After 5 minutes, press the STOP key to stop the pump; press the STOP key again to exit from
the Vacuum Test function
k) Press any key to return to the initial screen or press the FEED key to print the report of the
function
l) Press the R key, the led starts blinking and the display shows the following screen (to modify
the set values – see 2.10 "Control module")
•RECOVERY ALL
•MAX RECOV. 12.000 hypothetical value
m) By means of the UP key or with the numeric keys, set 10.00, which is the refrigerant quantity
in kg that will be transferred into the unit’s bottle (To modify the set values – see 2.10 "Control
module") Slowly open the valve of the bottle
n) Press the START key to start recovery; the unit will stop automatically as soon as the
previously set quantity has been transferred into the unit’s bottle.
o) Close the valve of the service bottle

Automatic A/C-Service Unit
18
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
p) Press the Rkey, the led starts blinking and the display shows the following screen (to modify
the set values – see 2.10 "Control module"):
•RECOVERY ALL
•MAX RECOV. 12.000 hypothetical value
q) Press the START key to start recovering the refrigerant inside the hose and wait for the
automatic stop of the recovery unit.
r) Press the STOP key twice to exit from the RECOVERY function
s) Press any key to return to the initial screen or press the FEED key to print the report of the
function
t) Disconnect the 52 hose from the service bottle
u) Remount the 55 quick coupler valve (red) on the 52 flexible hose
v) Press the Vkey, the led starts blinking and the set vacuum time appears on the screen (to
modify the set values – see 2.10 "Control module")
w) Press the START key in order to start the vacuum cycle. The display will show:
•VACUUM TIME
•REMAINING TIME
x) Leave the vacuum pump running for about 5 minutes
y) After 5 minutes, press the STOP key to stop the pump; press the STOP key again to exit from
the Vacuum Test function.
z) Press any key to return to the initial screen or press the FEED key to print the report of the
function
aa) Turn the 67 switch to position 0 if the unit will not be used immediately

Automatic A/C-Service Unit
19
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
4.4.2 E MPTYING THE INTERNAL BOTTLE
a) Make a vacuum in an external bottle able to contain the refrigerant there is in the internal bottle
b) Remove the unit’s rear panel and the cover
c) Connect the 52 hose to the 78 service connection situated on valve assembly, after you have
removed the protection cap.
d) By means of the service hose supplied with the unit, connect the valve of the external bottle
(previously evacuated) to the 118 service connection of the internal bottle and close the 23 valve
e) Open the 24 valve and the valve on the external bottle
f) Start the automatic Recovery function to empty the internal bottle completely. Recovery will stop
automatically
g) Close the 24 valve and the valve on the external bottle, disconnect the service hose from the 118
service connection and remount the protection cap.
h) Connect the 53 hose to the 85 -105 compressor service connection after you have removed the
protection cap and select the LOW side on the control panel.
i) Start the vacuum and vacuum test function for about 120 minutes
j) At the end of the Vacuum and Vacuum test function, disconnect the 53 hose from the 78 service
connection, remount the protection cap and proceed with the scale calibration (see 4.4)
k) Disconnect the 53 hose from the 85 -105 compressor service connection and remount the
protection cap.
l) At the end of operations, open again the 23 valve and remount the rear panel and the cover.

Automatic A/C-Service Unit
20
Letzte Änderung: 24.06.2009 / Art.Nr.: 2059ENG
5. Recovery
WARNING
During Recovery, set the LOW and HIGH valves on the control panel so that the input pressure never rises over
5 bar.
When the Recovery function has been started, it will only last max. 120 minutes. In case the pre-set
quantity of refrigerant has not been recovered within 120 minutes, the unit will stop automatically and the
alarm message will appear on the display.
5.1 P REPARING THE VEHICLE FOR REFRIGERANT RECOVERY FROM THE A/C SYSTEM
The preliminary preparation of the vehicle facilitates the separation of refrigerant and lubricant and
prevents the latter from being dragged.
a) Turn on the engine with closed hood. Turn the A/C system on and have it run for some minutes.
b) Open the hood and set the A/C system fan to maximum speed.
c) Have the vehicle engine run slowly (800 - 1200 revolutions/min) for at least 20 minutes.
d) Turn the vehicle engine off and have the A/C system fan run at maximum speed and start
recovery operations .
5.2 R EFRIGERANT RECOVERY FOR R= ALL
This function allows the total recovery of the refrigerant. The unit automatically stops, when the A/C
system reaches a residual internal pressure of -0,2 bar.
a) Make sure that all valves are closed and that the 67 main switch is in position 0
b) Connect the 56 valve of the 53 hose to the A/C system low pressure service connection.
c) Connect the 55 valve of the 52 hose to the A/C system high pressure service connection
d) Turn the power on by turning the 67 main switch to position I
e) Press the R key (blinking led): the following screen will appear on the display:
•RECOVERY ALL
•RECOV. MAX 12.000 hypothetical value
f) P the START key: the unit starts refrigerant recovery, the led of the Rkey is on and the display
shows:
•the refrigerant quantity that is being recovered
•the refrigerant contained in the stocking bottle
•the number of recovery cycles performed
If there is no refrigerant, the function will not be activated and the alarm message will appear on the
display
g) At the end of recovery, the unit stops automatically and waits for 5 minutes.
h) If during these 5 minutes the pressure inside the A/C system rises beyond 0,4 bar, the unit will
automatically start another recovery cycle
i) The unit will perform maximum 5 recovery cycles. If the pressure inside A/C system still rises beyond
0,4 bar even after the third recovery cycle, the unit will automatically stop the operations and the
alarm message will be displayed
j) If after the 5 minutes the pressure does not rise beyond 0,4 bar, the unit will automatically stop and
will automatically start the oil discharge and the screen corresponding to the function will be
displayed
k) At the end of the function, the summarizing screen will appear on the display:
•RECOVERED REFRIGERANT
•OIL DISCHARGED
l) At the end of the function, the unit will print a report (the print can be repeated)