TEXA Konfort 700R Series User manual

Konfort Series 700R Service Manual TEXA Technical Assistance
I
Copyright © 20 4 – TEXA S.p.A.
TABLE OF CONTENTS
INTRODUCTION ………………………………………………………………… 1
GENERAL SAFETY ………………………………………………………………. 2
CHAPTER 1 – COMPARISON BETWEEN R1234yf AND R134a
REFRIGERANTS ………………………………………………………………… 4
1.1 Introduction to the Greenhouse Effect ………………………………………… 4
1.2 The Directive 2006/40/CE ……………………………………………………………… 4
1.3 Features of the ne refrigerant R1234yf …………………………………… 5
1.4 The TEXA solution: Konfort series 700R ……………………………………… 7
CHAPTER 2 – GENERAL WOR ING PRINCIPLE ……………………. 9
2.1 Introduction …………………………………………………………………………………… 9
2.2 Detailed description of the single phases …………………………………… 11
2.2.1 Refrigerant Recovery …………………………………………………………… 11
2.2.2 Oil Drain …………………………………………………………………………… 13
2.2.3 Vacuum ………………………………………………………………………………… 13
2.2.4 Leak Test ……………………………………………………………………………… 15
2.2.5 Oil njection ………………………………………………………………………… 15
2.2.6 UV njection ………………………………………………………………………… 16
2.2.7 Refrigerant njection …………………………………………………………… 17
2.3 The Evolution of the BiGas management: refrigerant recovery
and injection into Konfort 780R units ……………………………………… 18
2.3.1 Recovery of R134a refrigerant ………………………………………… 18
2.3.2 Recovery of R1234yf refrigerant ……………………………………… 20
2.3.3 Refrigerant R134a injection ……………………………………………… 22
2.3.4 Refrigerant R1234yf injection ……………………………………………… 23
2.4 Refrigerant Recovery on Konfort 705R ………………………………………… 24
CHAPTER 3 – ONFORT SERIES 700R: NEW ARCHITECTURE OF
THE MENU ………………………………………………………………………… 26
3.1 Konfort 705R, 710R, 720R: Text menu on blue LCD display …… 26
3.1.1 The AC maintenance menu …………………………………………………… 27
3.1.2 The Additional functions menu …………………………………………… 28
3.1.3 The Settings menu …………………………………………………………… 29
3.1.4 The Service menu ………………………………………………………………… 30
3.2 Konfort 760R, 760R Bus and 780R BiGas: Graphic menu on
color display ……………………………………………………………………………… 31
3.2.1 The AC maintenance menu …………………………………………………… 32
3.2.2 The Additional functions menu …………………………………………… 33
3.2.3 The Settings menu ………………………………………………………………… 36
3.2.4 The Service menu ……………………………………………………………… 37
CHAPTER 4 – THE SERVICE MENU ………………………………………. 38
4.1 The Service menu …………………………………………………………………………… 38
4.2 The “POWER OUTPUTS” function on K705R, K710R, K720R …… 42
4.3 The “POWER OUTPUTS” function on Konfort 760R, 760R Bus or
780R BiGas …………………………………………………………………………… 48
4.4 The “SENSOR CALIBRATION” function on K705R, K710R, K720R 52
4.4.1 “REFR GERANT” calibration on K705R, K710R and K720R 52
4.4.2 “UV ADD T VE” calibration on K710R and K720R ………… 58
4.4.3 “NEW O L” calibration on K705R, K710R and K720R ……… 58
4.4.4 “MA N SENSOR” calibration on K705R, K710R and K720R 58

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4.4.5 “SECONDARY SENSORS” calibration on K705R, K710R,
K720R ……………………………………………………………………………………………… 61
4.5 The “SENSOR CALIBRATION” function on Konfort 760R, 760R
Bus and 780R BiGas …………………………………………………………………… 62
4.5.1 “REFR GERANT” calibration on Konfort 760R and 760R
Bus …………………………………………………………………………………………………… 62
4.5.2 “REFR GERANT” calibration on Konfort 780R BiGas ………… 68
4.5.3 “RECOVERED O L” calibration on Konfort 760R, 760R Bus
and 780R BiGas …………………………………………………………………………… 76
4.5.4 “UV ADD T VE” calibration on Konfort 760R, 760R Bus
and 780R BiGas …………………………………………………………………………… 80
4.5.5 “NEW O L” calibration on Konfort 760R, 760R Bus and
780R BiGas ………………………………………………………………………………… 81
4.5.6 “MA N SENSOR” calibration on Konfort 760R, 760R Bus
and 780R BiGas ………………………………………………………………………… 81
4.5.7 “SECONDARY SENSORS” calibration on Konfort 760R,
760R Bus and 780R BiGas ………………………………………………………… 85
4.6 “PRIVATE PARAMETERS” function on Konfort 700R units ………… 85
4.6.1 List of the private parameters for Konfort 705R …………… 85
4.6.2 List of the private parameters for Konfort 710R …………… 86
4.6.3 List of the private parameters for Konfort 720R …………… 87
4.6.4 List of the private parameters for Konfort 760R …………… 87
4.6.5 List of the private parameters for Konfort 760R Bus …… 88
4.6.6 List of the private parameters for Konfort 780R BiGas … 89
4.7 “PUBLIC PARAMETERS” function on Konfort 700R units ………… 89
4.7.1 List of the public parameters for Konfort 705R ……………… 90
4.7.2 List of the public parameters for Konfort 710R ……………… 91
4.7.3 List of the public parameters for Konfort 720R ……………… 92
4.7.4 List of the public parameters for Konfort 760R ……………… 93
4.7.5 List of the public parameters for Konfort 760R Bus ……… 94
4.7.6 List of the public parameters for Konfort 780R BiGas …… 95
4.8 “CALIBRATION STATUS” function on Konfort 700R units ……… 95
4.9 “SELECT REFRIGERANT” function on Konfort 700R units ……… 97
4.10 “STORED ERRORS” function on Konfort 700R units ……………… 97
4.11 “DEFAULT PARAMETERS” function on Konfort 700R units …… 99
4.12 “CUSTOMISED SERVICE” function on Konfort 700R units ……… 100
CHAPTER 5 – ORDINARY MAINTENANCE …………………………… 104
5.1 Main Filter Replacement ……………………………………………………………… 104
5.2 Vacuum Pump Oil Replacement …………………………………………………… 110
CHAPTER 6 – SOFTWARE UPDATE ……………………………………… 113
6.1 Manual update of the soft are packages in the SD card …………… 114
6.2 Automatic update by means of Konfort 700 Updater ………………… 116
CHAPTER 7 – TROUBLE SHOOTING ……………………………………. 122
7.1 Introduction …………………………………………………………………………………… 122
7.2 The equipment does not s itch on ……………………………………………… 123
7.3 The display of the Konfort unit does not visualize correctly …… 126
7.4 The unit does not recover refrigerant …………………………………… 130
7.5 The unit does not perform the vacuum ……………………………………… 136
7.6 The unit does not inject oil ………………………………………………………… 140
7.7 The unit does not inject UV additive …………………………………………… 142
7.8 Too much oil and/or UV additive is injected ……………………………… 143
7.9 The equipment does not inject refrigerant ……………………………… 146
7.10 The unit injects a larger amount of refrigerant ……………………… 148

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Copyright © 20 4 – TEXA S.p.A.
7.11 The recovered oil is not discharged into the DRAIN bottle …… 150
7.12 The main load cell is not properly calibrated …………………………… 151
7.13 The auxiliary load cells are not properly calibrated ………………… 152
7.14 The main pressure sensor is not properly calibrated …………… 152
APPENDX 1 – SPARE PARTS PORTAL ………………………………… 154
APPENDX 2 – ELECTRICAL AND SIGNAL CONNECTIONS ……….. 155
APPENDIX 3 – FLOW DIAGRAMS ………………………………………… 165
APPENDIX 4 – SOLENOID VALVES LOCATION ……………………… 169

Konfort Series 700R Service Manual TEXA Technical Assistance
Copyright © 20 4 – TEXA S.p.A.
INTRODUCTION
This manual is intended to simplify routine and extraordinary
maintenance on the ne air-conditioning recharging units Konfort 700R
series.
The first chapter of this manual ill aim to compare the features of the
t o refrigerants R134a and R1234yf in relation to their use in air-
conditioning systems and, therefore, in the ne Konfort 700R series
equipments.
Since any type of assistance operation is not possible ithout an
excellent kno ledge of the equipment (in particular, of the components
involved during its operating cycle), in the next chapter plenty space ill
be given to the description of each component involved in the cycle,
firstly starting ith a description of the overall operation, then gradually
giving further details to the description.
In particular, the ay in hich Konfort 780R BiGas equipments are able
to do the s itch bet een the t o types of refrigerant ill be analyzed.
The third chapter ill describe the main functions of the menu of the
Konfort 700R series equipments.
In the fourth chapter, then, the features of the Service menu of the
equipments ill be carefully described. Particular attention ill be given
to the section hich allo s to check the functioning of the sensors and
actuators of the Konfort unit. Furthermore, a detailed description of the
ne calibration procedures of the equipment’s sensors ill be provided.
The fifth chapter ill provide a brief description of the main ordinary
maintenance operations hich ill have to be periodically performed on
the equipment.
The sixth chapter explains the procedures that are necessary to follo to
perform the soft are updates required during the normal service and
assistance operations on the equipment.
Finally, the seventh chapter ill revie in detail the techniques of
diagnosis and resolution of problems you might encounter in the ork of
maintaining of Konfort equipments, produced by TEXA S.p.A. The goal is
that of providing an easy-to-use trouble shooting, here each problem is
separately dealt, leading the reader to its correct solution.

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GENERAL SAFETY
onfort 700R series equipments are intended for qualified
personnel, ho must demonstrate to have a basic kno ledge of the
principles of refrigeration, of the operation of refrigeration systems,
of the physical properties of refrigerants and of the potential dangers
hich equipments under high pressure could cause.
onfort 700R series units are equipped ith the follo ing safety
devices:
-Safety pressure s itch: it stops the compressor hen action
pressure (19 Bars) has been reached.
-Safety valve: it is fully open if the action value (20 Bars) is
reached.
-Po er supply line fuses: they allo the interruption of the po er
supply in case of overload by any device.
Any type of tampering of the above mentioned safety devices is
strictly forbidden. TEXA S.p.A. declines any liability for
damages to people or things produced by not approved
alterations, even partial, performed on the equipment.
The onfort 700R series equipments are designed and constructed
to treat exclusively ith the refrigerant R134a or ith refrigerant
R1234yf. Their use is not approved ith any other kind of gas.
-The coolant fluid removed from an A/C system must be handled
ith extreme caution, in order to avoid any possible refrigerant
output to the open air.
-The tanks used for storing refrigerants must be dedicated each to
a particular cooling fluid, in order to avoid any possible mixing
bet een R134a and R1234yf. For any further information about
the precautions to adopt, refer to the safety sheets released by
the refrigerant fluid manufacturers.
-The tanks must be clean and clearly marked, in order to identify
the type of refrigerant inside them.
-It is absolutely forbidden to use external tanks or other storage
containers ithout homologation and not equipped ith safety
valves.
It’s mandatory to guard the equipments during their operation.
It’s mandatory to ear suitable protective clothes, like glasses and
gloves. The refrigerant liquids could cause physical injuries (i.e.
blindness). Due to their lo boiling temperature (about -30 °C), the
contact ith the skin may cause cold burns to the operator.
Avoid the inhalation of refrigerants’ vapors.

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Some air and R134a mixtures have been sho n to be combustible at
high pressures. These mixtures are potentially dangerous and may
generate fire or explosion, thus causing personal injuries and
damage. In addition, the refrigerant R1234yf is classified as
flammable. For these reasons, it is absolutely forbidden to use the
equipment near open flames, hot surfaces or any other possible
source of ignition.
Caution: Before performing any kind of reparation or component
replacement on the equipment, disconnect the it from the external
po er supply.
Caution: It is al ays recommended to depressurize the equipment
before making any maintenance or component replacement on it.
Caution: Before disconnecting the equipment from the vehicle, make
sure that every step of the service has been completed and that all
valves are closed, in order to prevent any possible release of
refrigerant into the atmosphere.
Caution: The hoses can contain refrigerant under pressure.
Disconnect the hoses ith extreme care and, any ay, al ays after a
proper depressurization of the equipment.
Caution: When the hoses are rolled onto their lateral support and the
rapid connectors are attached to their supports, be sure that the
connectors themselves ill not be open.

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Copyright © 20 4 – TEXA S.p.A.
CHAPTER 1 – COMPARISON BETWEEN R1234yf AND
R134a REFRIGERANTS
1.1 Introduction to the Greenhouse Effect
The greenhouse effect is the natural principle that refers to the ability
of a planet's atmosphere to retain the heat from the Sun. Thanks to the
greenhouse effect, the development of life on Earth is possible, because
the typical temperature imbalances of the celestial bodies ith no
atmosphere are avoided.
The atmospheric gases hich are responsible for this natural phenomenon
are called greenhouse gases, and they have the property of being
transparent to incoming solar radiation on the Earth but they can hold,
in a consistent manner, the infrared radiation emitted by the Earth's
surface, by the atmosphere and by the clouds.
Water vapor (H
2
O), carbon dioxide (CO
2
), nitrous oxide (N
2
O) and
methane (CH
4
) are the main greenhouse gases in the Earth’s atmosphere.
Ozone (O
3
), hich is often listed as a greenhouse gas, is not exactly one
of them: its action in the atmosphere, in fact, is mainly "cooling",
because it acts as a filter against the solar UV rays.
The air pollution, due to the continuous and increasing combustion of fossil
fuels, the emission of chlorofluorocarbons (CFCs) and hydrofluorocarbons
(HFCs) leads to an increase of the greenhouse gases in the atmosphere
(especially CO
2
, N
2
O and CH
4
) and, at the same time, a thinning of the
ozone layer. This leads to an abnormal increase in global temperature,
ith consequences in the medium/long term hich are still unpredictable
(extreme eather conditions, such as hurricanes, storms and floods).
The refrigerants used in cars’ air conditioning systems can also contribute
to this abnormal increase of the greenhouse effect. In order to quantify
the impact of each type of refrigerant on raising global temperatures, a
number of parameters are used, including the GWP (Global Warming
Potential). As benchmark for the calculation of this parameter, the CO
2
is
taken into account (namely, the GWP value for each gas is defined ith
reference to that of CO
2
).
1.2 The Directive 2006/40/CE
With the Directive 2006/40/EC the European Community requires that,
starting from January 1
st
, 2011, all the Member States will no longer
have the chance to grant EC type-approvals or national type-
approvals for vehicles hich are equipped ith air conditioning systems
designed to contain fluorinated greenhouse gases ith a GWP> 150.

Konfort Series 700R Service Manual TEXA Technical Assistance
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The directive also requires that, starting from January 1
st
, 2017, all the
ne registered cars ill be prohibited to have air-conditioning systems
containing fluorinated gases ith GWP> 150.
The refrigerant R134a, hich is currently used in the A/C systems of
vehicles ith a mass less than 3,5 tones, has a GWP factor = 1400: this
means that its global arming potential is 1400 times higher than the
one of carbon dioxide.
According to the ne constraints imposed by the EU Directive, the ne
refrigerant that has been established for the air conditioning systems of
ne registration vehicles ill be the R1234yf, because characterized by
a very lo global arming potential (GWP = 4).
Refrigerant GWP
R134a 1400
R1234yf 4
CO
2
1
Table 1.1 – GWP coefficients of the t o refrigerants
compared to that of carbon dioxide
1.3 Features of the new refrigerant R1234yf
The decision to opt for the ne refrigerant R1234yf is dictated by some of
its interesting features:
excellent environmental properties in relation to the greenhouse
effect (GWP=4).
reduced levels of acute and chronic toxicity, such as the ones of
R134a. The refrigerant R1234yf does not constitute any risk of
exposure due to chemical toxicity.
very similar performances to the ones of R134a: R1234yf is
thermally stable and compatible ith R134a system components. This
can lead to a potential direct replacement of the refrigerant in current
systems employing R134a (through appropriate conversion kits).
slight flammability: R1234yf is classified as a slightly-flammable
liquid. Ho ever, even if ignited, this refrigerant ould burn only
eakly, ith very limited effects. That flammability ould be,
therefore, absolutely manageable.

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Properties R1234yf R134a
Boiling point T
B
-29°C -26°C
Critical point T
C
95°C 102°C
P
VAP
MPA (25°C) 0,677 0,665
P
VAP
MPA (80°C) 2,44 2,63
GWP (100 ITH) 4 1410
Toxicity Lo Lo
Flammability Slight None
Table 1.2 – Comparative table of the properties of the t o refrigerants
Image 1.1 – Comparative graph of the pressure-temperature
characteristic of the t o refrigerants
Image 1.2 – Diagram sho ing the combustion levels of the
different types of refrigerant

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1.4 The TEXA solution: onfort series 700R
In order to face up to the advent of the ne refrigerant R1234yf, TEXA
has developed a ne line of innovative air-conditioning recharging units:
onfort series 700R.
All the Konfort series 700R units can be purchased right no for orking
either ith R134a gas or ith the ne R1234yf refrigerant (the only
exception is given by Konfort 780R BiGas, top of the line, hich is able to
ork simultaneously ith both types of refrigerant). The unit must be
initialized to ork ith one of the t o refrigerants by means of the Gas
Kit, hich has to be ordered together ith the equipment.
If a user ishes to opt initially for the R134a refrigerant, he can, in any
case, decide at any time to convert his Konfort unit to the use of the ne
refrigerant R1234yf by purchasing the appropriate Retrofit Kit R134a -
R1234yf (available as optional).
The TEXA offer is no completed ith t o entry level models hich are
dedicated exclusively to the R134a refrigerant, that is Konfort 705R and
Konfort 710R.
The follo ing table summarizes the technical features of all the models
of the ne Konfort 700R series:
Image 1.3 – The complete onfort series 700R ne line
Description 705R 710R 720R 760R 760R Bus 780R
R134a
Compatibility
•
•
•
•
•
•
R1234yf
Compatibility
x x
•
•
•
•
Double refrigerant
management
x x x x x
•
Rotating upper head
system (*)
x x
•
•
•
•
Totally automatic
recycling
x x x
•
•
•
Table 1.3 – Technical features of the various models of Konfort series 700R units
((*) – Feature not available for the German market)