Instruction book
Oil-injected screw compressors
API314964
GA 26+
Atlas Copco
Oil-injected screw compressors
GA 26+
API314964
Instruction book
Original instructions
WARNING
Read all safety warnings, instructions, illustrations and
specifications provided with this product. Failure to follow all
instructions listed in this instruction book may result in
personal injury, death and/or property damage.
COPYRIGHT NOTICE
Any unauthorized use or copying of the contents or any part thereof is prohibited.
This applies in particular to trademarks, model denominations, part numbers and
drawings.
This instruction book is valid for CE, non-CE as well as UKCA labelled machines. It
meets the requirements for instructions specified by the applicable European directives
or UK statutory instruments as identified in the Declaration of Conformity.
April 2024
No. API314964
www.atlascopco.com
Instruction book
Table of contents
1 Safety precautions..........................................................................................................6
1.1 Safety icons................................................................................................................................6
1.2 General safety precautions.................................................................................................... 6
1.3 Safety precautions during installation................................................................................ 7
1.4 Safety precautions during operation.................................................................................... 8
1.5 Safety precautions during maintenance or repair............................................................ 10
1.6 Dismantling and disposal........................................................................................................ 11
2 General description......................................................................................................13
2.1 Introduction............................................................................................................................. 13
2.2 Air flow..................................................................................................................................... 15
2.3 Oil system..................................................................................................................................16
2.4 Cooling system.........................................................................................................................17
2.5 Condensate system..................................................................................................................18
2.6 Regulating system................................................................................................................... 19
2.7 Electrical system.................................................................................................................... 20
2.8 Electrical diagrams................................................................................................................ 20
3 Elektronikon™ Graphic controller.............................................................................. 22
3.1 ElektronikonTM Graphic controller....................................................................................22
3.2 Control panel.......................................................................................................................... 24
3.3 Icons used................................................................................................................................. 25
3.4 Main screen...............................................................................................................................28
3.5 Calling up menus...................................................................................................................... 33
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3.6 Inputs menu............................................................................................................................... 34
3.7 Outputs menu............................................................................................................................37
3.8 Counters................................................................................................................................... 38
3.9 Control mode selection......................................................................................................... 40
3.10 Service menu.............................................................................................................................41
3.11 Setpoint menu........................................................................................................................... 45
3.12 Event history menu..................................................................................................................46
3.13 Modifying general settings................................................................................................... 47
3.14 Info menu................................................................................................................................... 49
3.15 Week timer menu.......................................................................................................................50
3.16 Test menu...................................................................................................................................58
3.17 User password menu............................................................................................................... 60
3.18 Web server................................................................................................................................60
3.19 Programmable settings.......................................................................................................... 68
4 Installation.....................................................................................................................70
4.1 Dimension drawings................................................................................................................. 70
4.2 Installation proposal............................................................................................................. 70
4.3 Electrical connections.......................................................................................................... 72
4.4 Pictographs.............................................................................................................................. 73
5 Operating instructions................................................................................................. 74
5.1 Initial start-up..........................................................................................................................74
5.2 Before starting........................................................................................................................76
5.3 Starting ....................................................................................................................................76
5.4 During operation..................................................................................................................... 77
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5.5 Checking the display............................................................................................................... 78
5.6 Stopping ....................................................................................................................................78
5.7 Taking out of operation..........................................................................................................79
6 Maintenance..................................................................................................................80
6.1 Preventive maintenance schedule.........................................................................................80
6.2 Oil specifications..................................................................................................................... 82
6.3 Storage after installation.................................................................................................... 84
6.4 Service kits............................................................................................................................... 84
6.5 Disposal of used material...................................................................................................... 84
7 Adjustments and servicing procedures..................................................................... 85
7.1 Drive motor ..............................................................................................................................85
7.2 Air filter....................................................................................................................................85
7.3 Oil and oil filter change.........................................................................................................86
7.4 Coolers..................................................................................................................................... 88
7.5 Safety valves............................................................................................................................89
8 Problem solving............................................................................................................90
9 Technical data............................................................................................................... 92
9.1 Readings on display................................................................................................................. 92
9.2 Electric cable size...................................................................................................................92
9.3 Settings of fan motor circuit breaker................................................................................ 93
9.4 Settings for overload relay and fuses...............................................................................94
9.5 Reference conditions and limitations.................................................................................. 94
9.6 Compressor data..................................................................................................................... 94
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9.7 Technical data controller.................................................................................................... 95
10 Instructions for use...................................................................................................... 97
11 Guidelines for inspection.............................................................................................98
12 Pressure equipment directives................................................................................... 99
13 Declaration of conformity.......................................................................................... 100
API314964 5
1 Safety precautions
1.1 Safety icons
Explanation
Danger to life
Warning
Important note
Instruction book
1.2
General safety precautions
1. The operator must employ safe working practices and observe all related work safety
requirements and regulations.
2. If any of the following statements does not comply with the applicable legislation, the stricter of
the two shall apply.
3. Installation, operation, maintenance and repair work must only be performed by authorized,
trained, specialized personnel. The personnel should apply safe working practices by use of
personal protection equipment, appropriate tools and defined procedures.
4. The compressor is not considered capable of producing air of breathing quality. For air of
breathing quality, the compressed air must be adequately purified according to the applicable
legislation and standards.
5. Before any maintenance, repair work, adjustment or any other non-routine checks:
• Stop the machine
• Press the emergency stop button
• Switch off the voltage
• Depressurize the machine
• Lock Out - Tag Out (LOTO):
• Open the power isolating switch and lock it with a personal lock
• Tag the power isolating switch with the name of the service technician.
• On units powered by a frequency converter, wait 10 minutes before starting any electrical
repair.
• Never rely on indicator lamps or electrical door locks before maintenance work, always
disconnect and check with measuring device.
If the machine is equipped with an automatic restart after voltage failure function and
if this function is active, be aware that the machine will restart automatically when
the power is restored if it was running when the power was interrupted!
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6. Never play with compressed air. Do not apply the air to your skin or direct an air stream at
people. Never use the air to clean dirt from your clothes. When using the air to clean
equipment, do so with extreme caution and wear eye protection.
7. The owner is responsible for maintaining the unit in safe operating condition. Parts and
accessories shall be replaced if unsuitable for safe operation.
8. It is prohibited to walk or stand on the unit or on its components.
9. If compressed air is used in the food industry and more specifically for direct food contact, it is
recommended, for optimal safety, to use certified Class 0 compressors in combination with
appropriate filtration depending on the application. Please contact your customer center for
advice on specific filtration.
10. The service switch should only be operated by a trained service specialist from the
manufacturer.
1.3
Precautions during installation
Safety precautions during installation
All responsibility for any damage or injury resulting from neglecting these precautions, or
non-observance of the normal caution and care required for installation, operation,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
1. The machine must only be lifted using suitable equipment in accordance with the applicable
safety regulations. Loose or pivoting parts must be securely fastened before lifting. It is strictly
forbidden to dwell or stay in the risk zone under a lifted load. Lifting acceleration and
deceleration must be kept within safe limits. Wear a safety helmet when working in the area of
overhead or lifting equipment.
2. The unit is designed for indoor use. If the unit is installed outdoors, special precautions must be
taken. Consult your supplier.
3. In case the device is a compressor, place the machine where the ambient air is as cool and
clean as possible. If necessary, install a suction duct. Never obstruct the air inlet. Care must be
taken to minimize the entry of moisture at the inlet air.
4. Any blanking flanges, plugs, caps and desiccant bags must be removed before connecting the
pipes.
5. Air hoses must be of correct size and suitable for the working pressure. Never use frayed,
damaged or worn hoses. Distribution pipes and connections must be of the correct size and
suitable for the working pressure.
6. In case the device is a compressor, the aspirated air must be free of flammable fumes, vapors
and particles, e.g. paint solvents, that can lead to internal fire or explosion.
7. In case the device is a compressor, arrange the air intake so that loose clothing worn by people
cannot be drawn in.
8. Ensure that the discharge pipe from the compressor to the aftercooler or air net is free to
expand under heat and that it is not in contact with or close to flammable materials.
9. No external force may be exerted on the air outlet valve; the connected pipe must be free of
strain.
10. If remote control is installed, the machine must bear a clear sign stating: DANGER: This
machine is remotely controlled and may start without warning.
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The operator has to make sure that the machine is stopped and depressurized and that the
electrical isolating switch is open, locked and labelled with a temporary warning before any
maintenance or repair. As a further safeguard, persons switching on or off remotely controlled
machines shall take adequate precautions to ensure that there is no one checking or working
on the machine. To this end, a suitable notice shall be affixed to the start equipment.
11. Air-cooled machines must be installed in such a way that an adequate flow of cooling air is
available and that the exhausted air does not recirculate to the compressor air inlet or cooling
air inlet.
12. The electrical connections must correspond to the applicable codes. The machines must be
earthed and protected against short circuits by fuses in all phases. A lockable power isolating
switch must be installed near the compressor.
13. On machines with automatic start/stop system or if the automatic restart function after voltage
failure is activated, a sign stating "This machine may start without warning" must be affixed
near the instrument panel.
14. In multiple compressor systems, manual valves must be installed to isolate each compressor.
Non-return valves (check valves) must not be relied upon for isolating pressure systems.
15. Never remove or tamper with the safety devices, guards or insulation fitted on the machine.
Every pressure vessel or auxiliary installed outside the machine to contain air above
atmospheric pressure must be protected by a pressure relieving device or devices as required.
16. Piping or other parts with a temperature in excess of 70˚C (158˚F) and which may be
accidentally touched by personnel in normal operation must be guarded or insulated. Other
high temperature piping must be clearly marked.
17. For water-cooled machines, the cooling water system installed outside the machine has to be
protected by a safety device with set pressure according to the maximum cooling water inlet
pressure.
18. If the ground is not level or can be subject to variable inclination, consult the manufacturer.
19. If the device is a dryer and no free extinguishing system is present in the air net close to the
dryer, safety valves must be installed in the vessels of the dryer.
Also consult the following safety precautions: Safety precautions during operation and
Safety precautions during maintenance.
These precautions apply to machinery processing or consuming air or inert gas.
Processing of any other gas requires additional safety precautions typical to the
application which are not included herein.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.
1.4
Safety precautions during operation
All responsibility for any damage or injury resulting from neglecting these precautions, or
non observance of the normal caution and care required for installation, operation,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
Precautions during operation
1. Never touch any piping or components of the machine during operation.
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Instruction book
2. Use only the correct type and size of hose end fittings and connections. When blowing through
a hose or air line, ensure that the open end is held securely. A free end will whip and may
cause injury. Make sure that a hose is fully depressurized before disconnecting it.
3. Persons switching on remotely controlled machines shall take adequate precautions to ensure
that there is no one checking or working on the machine. To this end, a suitable notice shall be
affixed to the remote start equipment.
4. Never operate the machine when there is a possibility of taking in flammable or toxic fumes,
vapors or particles.
5. Never operate the machine below or in excess of its limit ratings.
6. Keep all bodywork doors shut during operation. The doors may be opened for short periods
only, e.g. to carry out routine checks. Wear ear protectors when opening a door.
On machines without bodywork, wear ear protection in the vicinity of the machine.
7. People staying in environments or rooms where the sound pressure level reaches or exceeds
80 dB(A) shall wear ear protectors.
8. Periodically check that:
• All guards are in place and securely fastened
• All hoses and/or pipes inside the machine are in good condition, secure and not rubbing
• No leaks occur
• All fasteners are tight
• All electrical leads are secure and in good order
• Safety valves and other pressure relief devices are not obstructed by dirt or paint
• Air outlet valve and air net, i.e. pipes, couplings, manifolds, valves, hoses, etc. are in
good repair, free of wear or abuse
• Air cooling filters of the electrical cabinet are not clogged
9. If warm cooling air from compressors is used in air heating systems, e.g. to warm up a
workroom, take precautions against air pollution and possible contamination of the breathing
air.
10. On water-cooled compressors using open circuit cooling towers, protective measures must be
taken to avoid the growth of harmful bacteria such as Legionella pneumophila bacteria.
11. Do not remove any of, or tamper with, the sound-damping material.
12. Never remove or tamper with the safety devices, guards or insulations fitted on the machine.
Every pressure vessel or auxiliary installed outside the machine to contain air above
atmospheric pressure shall be protected by a pressure relieving device or devices as required.
13. Yearly inspect the air receiver. Minimum wall thickness as specified in the instruction book must
be respected. Local regulations remain applicable if they are more strict.
14. It is not allowed to directly use the hot water from the compressor cooling water circuit as
process water in pollution-sensitive applications such as the food and pharmaceutical industry.
Also consult following safety precautions: Safety precautions during installation and
Safety precautions during maintenance.
These precautions apply to machinery processing or consuming air or inert gas.
Processing of any other gas requires additional safety precautions typical to the
application which are not included herein.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.
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1.5 Safety precautions during maintenance or repair
All responsibility for any damage or injury resulting from neglecting these precautions, or
non observance of the normal caution and care required for installation, operation,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
Precautions during maintenance or repair
1. Always use the correct safety equipment (such as safety glasses, gloves, safety shoes, etc.).
2. Use only the correct tools for maintenance and repair work.
3. Use only genuine spare parts for maintenance or repair. The manufacturer will disclaim all
damage or injuries caused by the use of non-genuine spare parts.
4. All maintenance work shall only be undertaken when the machine has cooled down.
5. A warning sign bearing a legend such as "Work in progress; do not start" shall be attached to
the starting equipment.
6. Persons switching on remotely controlled machines shall take adequate precautions to ensure
that there is no one checking or working on the machine. To this end, a suitable notice shall be
affixed to the remote start equipment.
7. Close the compressor air outlet valve and depressurize the compressor before connecting or
disconnecting a pipe.
8. Before removing any pressurized component, effectively isolate the machine from all sources of
pressure and relieve the entire system of pressure.
9. Never use flammable solvents or carbon tetrachloride for cleaning parts. Take safety
precautions against toxic vapors of cleaning liquids.
10. Scrupulously observe cleanliness during maintenance and repair. Keep dirt away by covering
the parts and exposed openings with a clean cloth, paper or tape.
11. Never weld or perform any operation involving heat near the oil system. Oil tanks must be
completely purged, e.g. by steam cleaning, before carrying out such operations. Never weld on,
or in any way modify, pressure vessels.
12. Whenever there is an indication or any suspicion that an internal part of a machine is
overheated, the machine shall be stopped but no inspection covers shall be opened before
sufficient cooling time has elapsed; this to avoid the risk of spontaneous ignition of the oil vapor
when air is admitted.
13. Never use a light source with open flame for inspecting the interior of a machine, pressure
vessel, etc.
14. Make sure that no tools, loose parts or rags are left in or on the machine.
15. All regulating and safety devices shall be maintained with due care to ensure that they function
properly. They may not be put out of action.
16. Before clearing the machine for use after maintenance or overhaul, check that operating
pressures, temperatures and time settings are correct. Check that all control and shut-down
devices are fitted and that they function correctly. If removed, check that the coupling guard of
the compressor drive shaft has been reinstalled.
17. Every time the separator element is renewed, examine the discharge pipe and the inside of the
oil separator vessel for carbon deposits; if excessive, the deposits should be removed.
18. Protect the motor, air filter, electrical and regulating components, etc. to prevent moisture from
entering them, e.g. when steam cleaning.
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Instruction book
19. Make sure that all sound-damping material and vibration dampers, e.g. damping material on the
bodywork and in the air inlet and outlet systems of the compressor, is in good condition. If
damaged, replace it by genuine material from the manufacturer to prevent the sound pressure
level from increasing.
20. Never use caustic solvents which can damage materials of the air net, e.g. polycarbonate
bowls.
21. Only if applicable, the following safety precautions are stressed when handling
refrigerant:
• Never inhale refrigerant vapors. Check that the working area is adequately ventilated; if
required, use breathing protection.
• Always wear special gloves. In case of refrigerant contact with the skin, rinse the skin with
water. If liquid refrigerant contacts the skin through clothing, never tear off or remove the
latter; flush abundantly with fresh water over the clothing until all refrigerant is flushed
away; then seek medical first aid.
Also consult following safety precautions: Safety precautions during installation and
Safety precautions during operation.
These precautions apply to machinery processing or consuming air or inert gas.
Processing of any other gas requires additional safety precautions typical to the
application which are not included herein.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.
1.6 Dismantling and disposal
Dismantling
Once the end of life of the machine is reached, please follow next steps:
1. Stop the machine.
2. Check all safety precautions mentioned in the previous chapters to secure safe handling (e.g.
LOTO, cool-down, depressurize, discharge, ...).
3. Separate the harmful from the safe components (e.g. drain oil from oil containing parts).
4. Refer to the disposal topic mentioned below.
Disposal of electrical and electronic appliances (WEEE)
This equipment falls under the provisions of the European Directive 2012/19/EU on waste electrical
and electronic appliances (WEEE) and may not be disposed as unsorted waste.
The equipment is labelled in accordance with the European Directive 2012/19/EU with the crossedout wheelie bin symbol.
At the end of life-time of the electric and electronic equipment (EEE) it must be taken to separate
collection.
For more information check with your local waste authority, customer center or distributor.
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Instruction book
Disposal of other used material
Used filters or any other used material (e.g. filter bags, filter media, desiccant, lubricants, cleaning
rags, machine parts, etc.) must be disposed of in an environmentally friendly and safe manner, and
in line with the local recommendations and environmental legislation.
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2 General description
2.1 Introduction
General
GA 11+ up to GA 30 are single-stage, oil-injected screw compressors driven by an electric motor.
The compressors are air-cooled. The compressors are enclosed in sound-insulated bodywork.
The controller and the emergency stop button are integrated in the door panel of the electric
cubicle. An electric cabinet comprising the motor starter is located behind this panel.
A condensate trap with automatic drain system is provided.
Workplace compressors have no dryer, while Workplace Full-Feature (FF) compressors are
provided with an integrated air dryer.
GA Workplace
Figure 1: Front view, GA 18+ Workplace
AV Location of air outlet valve
ER Elektronikon controller
S3 Emergency stop button
Dm Manual condensate drain
Da Automatic condensate drain
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Instruction book
Figure 2: Front view, GA 11+ up to GA 30 Workplace
Ref. Name
AF Air filter
AR Air receiver
AV Location of air outlet valve
Ca Air cooler
Co Oil cooler
ER Elektronikon controller
M1 Drive motor
OF Oil filter
S3 Emergency stop button
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2.2 Air flow
Flow diagrams
Figure 3: GA 11+ up to GA 30 Workplace
References
Ref. Description
A Intake air
B Air/oil mixture
C Hot compressed air
D Oil
Description
Air drawn through air inlet filter (AF) and open inlet valve (IV) into compressor element (E) is
compressed. Compressed air and oil flow into the air receiver/oil separator (AR). The air is
discharged via minimum pressure valve (Vp) and air cooler (Ca).
Minimum pressure valve (Vp) prevents the receiver pressure from dropping below a minimum
pressure and includes a check valve which prevents blow-back of compressed air from the net
when air delivery is stopped.
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2.3 Oil system
Flow diagram
Instruction book
Figure 4: Oil system
References Description
A Intake air
B Air/oil mixture
C Compressed air
D Oil
E Wet (100 % saturated) compressed air
F Condensate
Description
The air/oil mixture coming from the compressor element flows into the oil separator/tank, where
most of the oil is separated by centrifugal action. The oil collects in the lower part of air receiver/oil
separator (AR) which serves as oil tank. The remaining oil is removed by oil separator (OS).
Air pressure forces the oil from air receiver (AR) through oil cooler (Co) and filter (OF) towards
compressor element (E).
The system comprises a thermostatic bypass valve (BV). Only when the oil is warm, the valve
allows the oil to pass through the oil cooler.
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Instruction book
2.4 Cooling system
Flow diagram
Figure 5: Cooling circuit
References Description
A Intake air
B Compressed air/oil
C Compressed air
D Oil
E Wet (100 % saturated) compressed air
F Condensate
Description
The cooling system comprises air cooler (Ca) and oil cooler (Co).
On air-cooled compressors, the cooling air flow is generated by fan (FN).
API314964 17
2.5 Condensate system
Condensate drains
Instruction book
Figure 6: Drain on air cooler
Figure 7: Drain connections, Workplace Full-Feature
Reference Designation
Da Automatic drain connection, compressor
Da1 Automatic drain connection, dryer (only on Full-Feature units)
Dm Manual drain connection, compressor
Dm1 Manual drain connection, dryer (only on Full-Feature units)
(1) Drain connection of the filters (option)
GA Workplace compressors are equipped with a condensate trap, integrated in the air cooler. The
condensate trap is equipped with an electronic drain (EWD) for automatic draining of the
condensate during operation. The electronic water drain is connected to the automatic drain outlet
(Da) and to a manually operated valve (Dm) for draining after stopping the compressor.
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2.6 Regulating system
Flow diagram
Figure 8: Regulating system (loaded condition)
Loading
When the net pressure is below the loading pressure, solenoid valve (Y1) is energised. Results:
• The space above unloading valve/blow-off valve (UV) is connected with the oil separator tank
pressure (1) via the solenoid valve.
• Unloading valve/blow-off valve (UV) moves downwards, closing off the connection to channels
(2) and (3).
• Underpressure from the compressor element causes loading plunger (LP) to move downwards
and inlet valve (IV) to open fully.
Air delivery is 100%, the compressor runs loaded.
Unloading
If the air consumption is less than the air output of the compressor, the net pressure increases.
When the net pressure reaches the unloading pressure, solenoid valve (Y1) is de-energised.
Results:
• The pressure above unloading valve/blow-off valve (UV) is released to atmosphere and the
space above valve (UV) is no longer in connection with the oil separator tank pressure (1).
• Unloading valve/blow-off valve (UV) moves upwards, connecting the oil separator tank pressure
(1) with channels (2) and (3).
• The pressure in channel (2) causes the loading plunger (LP) to move upwards, causing inlet
valve (IV) to close, while the pressure is gradually released to atmosphere.
• The pressure in the separator tank stabilises at low value. A small amount of air is kept drawn
in to guarantee a minimal pressure, required for lubrication during unloaded operation.
Air output is stopped, the compressor runs unloaded.
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2.7 Electrical system
General
Also consult sections Electrical diagrams and Electrical connections.
Description
The electrical system comprises following components:
Reference Designation
F21 Overload relay, compressor motor
Q15 Circuit breaker, fan motor (on air-cooled compressors)
K11 Auxiliary contactor for dryer (only on Full-Feature compressors)
K21 Line contactor
K22 Star contactor
K23 Delta contactor
T1/T3 Transformer
PE Earthing terminal
Instruction book
2.8
Electrical diagrams
Diagram
Designations
Reference Sensors / solenoid valves / electronic water drain
PT20 Pressure sensor, air outlet
TT11 Temperature sensor, element outlet
TT90 Temperature sensor, dew-point (Full-Feature compressors)
TT01 Temperature sensor, ambient temperature
Y1 Loading solenoid valve
Reference Motors
M1 Drive motor
M2 Fan motor (on air-cooled compressors)
Reference Electric cabinet
B1 EWD (electronic water drain)
M3 cubicle fan
F21 Overload relay, drive motor
K21 Line contactor
K22 Star contactor
K23 Delta contactor
K25 Phase sequence relay
Q15 Circuit breaker, fan motor
T1 Transformer
1X0 -1X7 Terminal strips
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Instruction book
Reference Control module
E1 Elektronikon module
K01 Blocking relay
K02 Auxiliary relay, star contactor
K03 Auxiliary relay, delta contactor
K04 Auxiliary relay, loading/unloading
K05 Auxiliary relay, general shutdown
K06 Auxiliary relay, dryer
I Start button
O Stop button
S3 Emergency stop button
Reference Optional equipment
A1 Dryer (Full-Feature)
K11 Dryer contactor
K04’ Auxiliary relay, load/unload (option ES100)
K21 Auxiliary contact, compressor running (option ES100)
PDS11 Dp switch for DD filter
PDS12 Dp switch for PD filter
API314964 21
3 Elektronikon™ Graphic controller
3.1 ElektronikonTM Graphic controller
Control panel
Instruction book
Figure 9: Display of the ElektronikonTM Graphic controller
Introduction
The Elektronikon controller has following functions:
• Controlling the compressor
• Protecting the compressor
• Monitoring components subject to service
• Automatic restart after voltage failure (made inactive)
Automatic control of the compressor operation
The controller maintains the net pressure between programmable limits by automatically loading
and unloading the compressor (on compressors running at a fixed speed) or by adapting the motor
speed (compressors with frequency converter). A number of programmable settings, e.g. the
unloading and loading pressures (for fixed speed compressors), the setpoint (for compressors with
frequency converter), the minimum stop time and the maximum number of motor starts and several
other parameters are hereby taken into account.
The controller stops the compressor whenever possible to reduce the power consumption and
restarts it automatically when the net pressure decreases. In case the expected unloading period is
too short, the compressor is kept running to prevent too short standstill periods.
A number of time based automatic start/stop commands may be programmed. Take into
account that a start command will be executed (if programmed and activated), even after
manually stopping the compressor.
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Instruction book
Protecting the compressor
Shut-down
Several sensors are provided on the compressor. If one of the measured signals exceeds the
programmed shut-down level, the compressor will be stopped. This will be indicated on display (1)
and general alarm LED (2) will blink.
Remedy the trouble and reset the message. See also the Inputs menu.
Before remedying, consult the applicable safety precautions.
Shut-down warning
A shut-down warning level is a programmable level below the shut-down level.
If one of the measured signals exceeds the programmed shut-down warning level, a message will
appear on display (1) and general alarm LED (2) will light up to warn the operator that the shutdown warning level is exceeded.
The message disappears as soon as the warning condition disappears.
Warning
A warning message will appear if, on Full-Feature compressors, the dew point temperature is too
high in relation to the ambient temperature.
Service warning
A number of service operations are grouped (called Service Plans). Each Service Plan has a
programmed time interval. If a time interval is exceeded, a message will appear on display (1) to
warn the operator to carry out the service actions belonging to that Service Plan.
Automatic restart after voltage failure
The controller has a built-in function to automatically restart the compressor when the voltage is
restored after voltage failure.
For compressors leaving the factory, this function is made inactive. If desired, the function can be
activated. Consult the Atlas Copco Customer Centre.
If the function is activated and provided the regulator was in the automatic operation
mode, the compressor will automatically restart if the supply voltage to the module is
restored.
API314964 23
3.2 Control panel
Elektronikon regulator
Instruction book
Figure 10: Control panel
Parts and functions
Reference Designation Function
1 Display
2 Pictograph Automatic operation
3 Pictograph General alarm
4 Alarm LED
5 Pictograph Service
6 Service LED Lights up if service is needed
7 Automatic operation LED
8 Voltage on LED Indicates that the voltage is switched on.
9 Pictograph Voltage
10 Enter key Use this button to confirm the last action.
11 Escape key
12 Scroll keys Keys to scroll through the menu.
13 Stop button Button to stop the compressor. LED (7) goes out.
14 Start button
Shows the compressor operating condition and a
number of icons to navigate through the menu.
Flashes in case of a shut-down, is lit in case of a
warning condition.
Indicates that the regulator is automatically
controlling the compressor.
Use this button to go to previous screen or to end
the current action.
Button to start the compressor. LED (7) lights up
indicating that the Elektronikon regulator is
operative.
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3.3 Icons used
Status icons
Name Icon Description
Stopped / Running
Compressor status
Machine control mode
When the compressor is stopped, the icon stands still.
When the compressor is running, the icon is rotating.
Motor stopped
Running unloaded
Running loaded
or
Local start / stop
Remote start / stop
Network control
Automatic restart after voltage
failure
Week timer Week timer is active
Active protection functions
Automatic restart after voltage failure is active
Emergency stop
Shutdown
Warning
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Name Icon Description
Service Service required
Value lines display icon
Main screen display
Chart display icon
General icons No communication / network problem
Not valid
Instruction book
Input icons
Icon Description
System icons
Icon Description
Pressure
Temperature
Digital input
Special protection
Compressor element (LP, HP, ...)
Dryer
Fan
Frequency converter
Drain
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Icon Description
Menu icons
Icon Description
Filter
Motor
Failure expansion module
Network problem
General alarm
or
Inputs
Outputs
Alarms (Warnings, shutdowns)
Counters
Test
Settings
Service
Event history (saved data)
Access key / User password
Network
Setpoint
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Icon Description
Navigation arrows
Icon Description
Instruction book
Info
Up
Down
3.4
Main screen
Control panel
(1) Scroll keys
(2) Enter key
(3) Escape key
Function
The Main screen is the screen that is shown automatically when the voltage is switched on and one
of the keys is pushed. It is switched off automatically after a few minutes when no keys are pushed.
Typically, 5 different main screen views can be chosen:
1. Two value lines
2. Four value lines
3. Chart (High resolution)
4. Chart (Medium resolution)
5. Chart (Low resolution)
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