REMKO ATY 266 DC User manual

Operating and
installation instructions
Read the instructions prior to performing any task!
REMKO ATY series
ATY 266 DC, ATY 356 DC
Designer wall units for cooling and heating
0232-2019-09 Edition 1, en_GB

R32
Refrigerant
Translation of the original
Read these operating instructions carefully before commis-
sioning / using this device!
These instructions are an integral part of the system and must
always be kept near or on the device.
Subject to modifications; No liability accepted for errors or mis-
prints!

Table of contents
1 Safety and usage instructions............................................................................................................. 5
1.1 General safety notes....................................................................................................................... 5
1.2 Identification of notes...................................................................................................................... 5
1.3 Personnel qualifications.................................................................................................................. 5
1.4 Dangers of failure to observe the safety notes................................................................................ 5
1.5 Safety-conscious working............................................................................................................... 6
1.6 Safety instructions for the operator................................................................................................. 6
1.7 Safety notes for installation, maintenance and inspection ............................................................. 6
1.8 Unauthorised modification and changes......................................................................................... 7
1.9 Intended use................................................................................................................................... 7
1.10 Warranty........................................................................................................................................ 7
1.11 Transport and packaging............................................................................................................... 7
1.12 Environmental protection and recycling........................................................................................ 8
2 Technical data........................................................................................................................................ 9
2.1 Unit data.......................................................................................................................................... 9
2.2 Unit dimensions............................................................................................................................. 12
3 Design and function............................................................................................................................ 13
3.1 Unit description............................................................................................................................. 13
4 Operation............................................................................................................................................. 14
4.1 General notes................................................................................................................................ 14
4.2 Display on indoor unit.................................................................................................................... 14
4.3 Keys on the remote control........................................................................................................... 15
5 Installation instructions for qualified personnel.............................................................................. 22
5.1 Important notes prior to installation............................................................................................... 22
5.2 Wall openings................................................................................................................................ 22
5.3 Installation materials..................................................................................................................... 22
5.4 Selection of installation location ................................................................................................... 23
5.5 Connection variants for the indoor unit......................................................................................... 24
5.6 Minimum clearances..................................................................................................................... 25
5.7 Connection of the indoor unit when the refrigerant piping is installed under the plaster............... 26
5.8 Wall bracket.................................................................................................................................. 27
5.9 Oil return measures....................................................................................................................... 27
6 Installation........................................................................................................................................... 27
6.1 Installation of the indoor unit......................................................................................................... 27
6.2 Connection of refrigerant piping.................................................................................................... 28
6.3 Additional notes on connecting the refrigerant piping................................................................... 31
6.4 Leak testing................................................................................................................................... 31
6.5 Adding refrigerant.......................................................................................................................... 32
7 Condensate drainage connection and safe drainage...................................................................... 32
8Electrical wiring................................................................................................................................... 34
8.1 General notes................................................................................................................................ 34
8.2 Connecting the indoor unit............................................................................................................ 34
8.3 Outdoor unit connection................................................................................................................ 35
8.4 Electrical wiring diagram............................................................................................................... 35
8.5 Electrical drawings........................................................................................................................ 37
9 Before commissioning....................................................................................................................... 39
3

10 Commissioning................................................................................................................................... 39
11 Troubleshooting and customer service............................................................................................ 41
11.1 Troubleshooting and customer service........................................................................................ 41
11.2 Indoor unit fault analysis.............................................................................................................. 43
11.3 Resistances of the temperature probes...................................................................................... 54
12 Care and maintenance........................................................................................................................ 57
13 Shut-down............................................................................................................................................ 59
14 Exploded view and spare parts lists................................................................................................. 60
14.1 Exploded view - Indoor unit......................................................................................................... 60
14.2 Spare parts list - Indoor unit........................................................................................................ 61
14.3 Exploded view - Outdoor unit...................................................................................................... 62
14.4 Spare parts list - Outdoor unit..................................................................................................... 63
15 Index..................................................................................................................................................... 64
REMKO ATY series
4

1 Safety and
usage instructions
1.1 General safety notes
Carefully read the operating manual before com-
missioning the units or their components for the
first time. It provides useful tips and notes such as
hazard warnings to prevent injury and material
damage. Failure to follow the directions in this
manual can endanger persons, the environment
and the equipment itself or its components and will
void any claims for liability.
Store this manual and the information required for
the operation of this system (e.g. refrigerant data-
sheet) in the vicinity of the unit.
The refrigerant used in the system is flammable. If
applicable, observe the local safety conditions.
Warning of inflammable substances!
1.2 Identification of notes
This section provides an overview of all important
safety aspects for proper protection of people and
safe and fault-free operation.The instructions and
safety notes contained within this manual must be
observed in order to prevent accidents, personal
injury and material damage.
Notes attached directly to the units must be
observed in their entirety and be kept in a fully
legible condition.
Safety notes in this manual are indicated by sym-
bols. Safety notes are introduced with signal words
which help to highlight the magnitude of the danger
in question.
DANGER!
Contact with live parts poses an immediate
danger of death due to electric shock. Damage
to the insulation or individual components may
pose a danger of death.
DANGER!
This combination of symbol and signal word
warns of a situation in which there is immediate
danger, which if not avoided may be fatal or
cause serious injury.
WARNING!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may be fatal or cause
serious injury.
CAUTION!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may cause injury or mate-
rial and environmental damage.
NOTICE!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may cause material and
environmental damage.
This symbol highlights useful tips and recom-
mendations as well as information for efficient
and fault-free operation.
1.3 Personnel qualifications
Personnel responsible for commissioning, opera-
tion, maintenance, inspection and installation must
be able to demonstrate that they hold a qualifica-
tion which proves their ability to undertake the
work.
1.4 Dangers of failure to observe
the safety notes
Failure to observe the safety notes may pose a risk
to people, the environment and the units. Failure to
observe the safety notes may void any claims for
damages.
5

In particular, failure to observe the safety notes
may pose the following risks:
nThe failure of important unit functions.
nThe failure of prescribed methods of mainte-
nance and repair.
nDanger to people on account of electrical and
mechanical effects.
1.5 Safety-conscious working
The safety notes contained in this manual, the
existing national regulations concerning accident
prevention as well as any internal company
working, operating and safety regulations must be
observed.
1.6 Safety instructions
for the operator
The operational safety of the units and compo-
nents is only assured providing they are used as
intended and in a fully assembled state.
nThe units and components may only be set up,
installed and maintained by qualified per-
sonnel.
nProtective covers (grills) over moving parts
must not be removed from units that are in
operation.
nDo not operate units or components with
obvious defects or signs of damage.
nContact with equipment parts or components
can lead to burns or injury.
nThe units and components must not be
exposed to any mechanical load, extreme
levels of humidity or extreme temperatures.
nRooms in which refrigerant may escape shall
be adequately aerated and ventilated. Other-
wise, a risk of suffocation or fire exists.
nDo not leave children unsupervised when close
to the system.
nCommissioning must be performed by author-
ised specialists exclusively. Deficient commis-
sioning may lead to water leaks, electric
shocks or fire. Commissioning must take place
as described in the user manual.
nOnly instruct authorised specialist personnel to
perform maintenance or servicing.
nThe system is filled with a flammable refrig-
erant. Never thaw any frozen unit components
independently!
nDo not operate any further devices that pro-
duce high heat or naked flames in the same
room.
nAll housing parts and unit openings, e.g. air
inlets and outlets, must be kept clear.
nThe units must be inspected by a service tech-
nician to ensure that they are safe to use and
fully functional at least once yearly. Visual
inspections and cleaning may be performed by
the operator when the units are disconnected
from the mains.
1.7 Safety notes for installation,
maintenance and inspection
nThe refrigerant R32 used in the system is flam-
mable. If applicable, observe the local safety
conditions.
nKeep the cooling circuit clear of other gases
and foreign substances. Only fill the cooling cir-
cuit with the refrigerant R32.
nOnly use the accessories, components and
appropriately marked parts provided. The use
of non-standardised components may result in
water leaks, electric shocks and fire.
nOnly install and store the units in rooms larger
than 4 m2. With a failure to comply, leaks may
result in the room filling with a flammable mix-
ture!
The minimum room size of 4 m2 required for
installation and storage pertains to the basic fill
quantity of the unit. This varies according to the
installation type and total fill quantity of the
system. The calculation must take place in
accordance with valid DIN standards. Make
sure that the installation site is suitable for safe
unit operation.
nOnly mount the unit components on structurally
suitable brickwork.
nThe units must not be installed in rooms in
which further devices that produce heat are
operated (heaters, open hearths).
nMake sure the installation room is sufficiently
ventilated.
nInterventions in the cooling circuit are only pos-
sible after completely draining the refrigerant.
Never solder or grind unit components!
nNote that refrigerant may be odourless.
nNever operate the air conditioning unit in a
humid room, such as a bathroom or laundry
room. If the humidity is too high, this can cause
short circuits on electrical parts.
nThe product must be correctly earthed at all
times, otherwise it may induce electric shocks.
nAttach the condensate drain as described in
the operating manual. The inadequate
drainage of condensate can lead to water
damage in your apartment.
nAll persons who intervene in the cooling circuit
must hold a valid certificate from the chamber
of industry and commerce, which confirms their
ability to work with refrigerant.
REMKO ATY series
6

nAppropriate hazard prevention measures must
be taken to prevent risks to people when per-
forming installation, repair, maintenance or
cleaning work on the units.
nThe setup, connection and operation of the
units and its components must be undertaken
in accordance with the usage and operating
conditions stipulated in this manual and comply
with all applicable regional regulations.
nRegional regulations and laws as well as the
Water Ecology Act must be observed.
nThe power supply should be adapted to the
requirements of the units.
nUnits may only be mounted at the points pro-
vided for this purpose at the factory. The units
may only be secured or mounted on stable
structures, walls or floors.
nThe units and components should not be oper-
ated in areas where there is a heightened risk
of damage. Observe the minimum clearances.
nThe units and components must be kept at an
adequate distance from flammable, explosive,
combustible, abrasive and dirty areas or
atmospheres.
nSafety devices may not be modified or
bypassed.
nThe connection of the indoor unit must be
established as a permanent connection; a
detachable, reusable connection is not permis-
sible.
1.8 Unauthorised modification
and changes
Modifications or changes to units and components
are not permitted and may cause malfunctions.
Safety devices may not be modified or bypassed.
Original replacement parts and accessories
authorised by the manufactured ensure safety. The
use of other parts may invalidate liability for
resulting consequences.
1.9 Intended use
Depending on the model, the units and the addi-
tional fittings with which they are equipped are only
intended to be used as an air-conditioner for the
purpose of cooling or heating the air in an
enclosed space.
Any different or additional use is a non-intended
use. The manufacturer/supplier assumes no lia-
bility for damages arising from a non-intended use.
The user bears the sole risk in such cases.
Intended use also includes working in accordance
with the operating and installation instructions and
complying with the maintenance requirements.
The threshold values specified in the technical
data must not be exceeded.
1.10 Warranty
For warranty claims to be considered, it is essential
that the ordering party or its representative com-
plete and return the "certificate of warranty" to
REMKO GmbH & Co. KG at the time when the
units are purchased and commissioned.
The warranty conditions are detailed in the "Gen-
eral business and delivery conditions". Further-
more, only the parties to a contract can conclude
special agreements beyond these conditions. In
this case, contact your contractual partner in the
first instance.
1.11 Transport and packaging
The devices are supplied in a sturdy shipping con-
tainer. Please check the equipment immediately
upon delivery and note any damage or missing
parts on the delivery and inform the shipper and
your contractual partner. For later complaints can
not be guaranteed.
WARNING!
Plastic films and bags etc. are dangerous
toys for children!
Why:
- Leave packaging material are not around.
- Packaging material may not be accessible to
children!
7

1.12 Environmental protection
and recycling
Disposal of packaging
All products are packed for transport in environ-
mentally friendly materials. Make a valuable contri-
bution to reducing waste and sustaining raw mate-
rials. Only dispose of packaging at approved
collection points.
Disposal of equipment and components
Only recyclable materials are used in the manufac-
ture of the devices and components. Help protect
the environment by ensuring that the devices or
components (for example batteries) are not dis-
posed in household waste, but only in accordance
with local regulations and in an environmentally
safe manner, e.g. using certified firms and recy-
cling specialists or at collection points.
REMKO ATY series
8

2 Technical data
2.1 Unit data
Series ATY 266 DC ATY 356 DC
Operating mode Inverter wall-mounted room air conditioner com-
bination for cooling and heating
Nominal cooling output 1) kW 2.64 (1.23-3.29) 3.51 (1.26-4.44)
Energy efficiency ratio SEER 1) 6.7 6.1
Electrical rated power consumption, cooling 1) kW 0.71 1.21
Electrical rated current consumption, cooling 1) A3.10 5.25
Power consumption, annual, QCE 3) kWh 132 178
Energy efficiency ratio, cooling 1) A++
Nominal heat capacity 2) kW 2.93 (0.85-3.72) 3.81 (1.1-4.36)
Energy efficiency ratio SCOP 4) 4.0
Electrical rated power consumption, heating 2) kW 0.77 1.34
Electrical rated current consumption, heating 2) A3.4 4.9
Power consumption, annual, QHE 3) kWh 785 922
Energy efficiency ratio, heating 2) A+
Max. power consumption kW 2.20
Max. current consumption A 10.0
EDP no. 1624460 1624465
1) Air inlet temp. TK 27 °C/FK 19 °C, outside temperature TK 35 °C, FK 24 °C, max. air flow volume,
5 m pipe length
2) Air inlet temp. TK 20 °C, outside temperature TK 7 °C, FK 6 °C, max. air flow volume, 5m pipe length
3) The specified value is based on results from standard testing.
The actual consumption depends on the use and location of the unit
4) The specified value is based on the average heating period
9

Data specific to indoor unit ATY 266 DC IT ATY 356 DC IT
Application area (room volume), approx. m380 110
Adjustment range, room temperature °C +17 to +30
Air flow volume per stage m3/h 305/421/530 305/421/530
Sound pressure level per stage 5) dB (A) 26/31/37 27/30/37
Sound pressure level, Silent/Turbo mode 5) dB (A) 21/39 22/38
Sound power level max. dB(A) 50
Enclosure class IP X0
Condensate drainage connection mm 16
Dimensions: H/W/D mm 312/897/182
Weight kg 9.5 9.9
EDP no. 1624462 1624467
5) At distance of 1 m in the open air; specified values are maximum values
REMKO ATY series
10

Data specific to outdoor unit ATY 266 DC AT ATY 356 DC AT
Power supply V/Ph/Hz 230/1~/50
Operating range, cooling 7) °C +5 to +30
Operating range, heating 8) °C +5 to +50
Air flow rate, max. m3/h 1900 2000
Enclosure class IP X4
Sound power level max. dB (A) 63
Sound pressure level 5) dB (A) 54
Refrigerant 6) R32
Refrigerant, basic quantity kg 0.80
CO2 equivalent t 0.54
Refrigerant, additional quantity >5 m g/m 20
Refrigerant piping, max. length m 25
Refrigerant piping, max. height m 10
Refrigerant connection, injection pipe Inches
(mm) 1/4 (6.35)
Refrigerant connection, suction pipe Inches
(mm) 3/8 (9.52)
Dimensions: H/W/D mm 555/770/300
Weight kg 27.0
EDP no. 1624461 1624466
5) At distance of 1 m in the open air; specified values are maximum values
6) Contains greenhouse gas according to Kyoto protocol, GWP 675
7) Expandable to -15 °C with WRK-1
8) Expandable to -20 °C with WRH-1
11

2.2 Unit dimensions
Outdoor units
B
C
D
AE
Fig. 1: Outdoor unit ATY 266-356 DC AT dimensions
Measurements (mm) A B C D E
ATY 266-356 DC AT 770 487 298 555 300
Indoor units
A
B
C
D
Fig. 2: Indoor unit dimensions ATY 266-356 DC IT
Measurements (mm) A B C D
ATY 266-356 DC IT 897 312 158 182
REMKO ATY series
12

3 Design and function
3.1 Unit description
The ATY 266-356 DC room air conditioners have a
REMKO ATY...AT outdoor unit as well as an
ATY...IT indoor unit.
In cooling mode, the outdoor unit serves to output
the heat extracted by the indoor unit from the room
being cooled. In heating mode, the heat taken up
by the outdoor unit can be discharged by the
indoor unit into the room to be heated. In both
operating modes, the output produced by the com-
pressor precisely matches requirements, and
thereby regulates the nominal temperature with
minimal temperature deviations. This "inverter
technology" results in energy savings over conven-
tional split systems and also reduces noise emis-
sions to a particularly low level. The outdoor unit
can be installed in an outdoor area or, providing
that certain requirements are met, an indoor area.
The indoor unit is designed to be mounted high up
on the wall, in indoor areas. It is operated by an
infrared remote control.
The outdoor unit consists of a cooling cycle with
compressor, fin condenser, condenser fan,
reversing valve and throttle element. The outdoor
unit is controlled by the regulation of the indoor
unit.
The indoor unit consists of a fin evaporator, evapo-
rator fan, controller and condensate tray.
Floor brackets, wall brackets, refrigerant piping and
condensate pumps are available as accessories.
21
4
3
Fig. 3: Cooling cycle diagram for indoor unit
1: Evaporator
2: Evaporator fan
3: Suction pipe connection
4: Injection pipe connection
2
1
4
3
5
7
8
9
6
Fig. 4: Cooling cycle diagram for outdoor unit
1: Condenser
2: Condenser fan
3: Reversing valve
4: Compressor
5: Filter dryer
6: Capillary tube throttle element
7: Pressure gauge connection
8: Suction pipe connection valve
9: Injection pipe connection valve
1
7
8
9
B
A
4
3
5
6
2
3
Fig. 5: System layout
A: Outdoor area
B: Indoor area
1: Indoor unit
2: Outdoor unit
3: Condensate drainage line
4: Condenser fan
5: Mains cable
6: Shut-off valve
7: Suction pipe
8: Injection pipe
9: Control line
Refrigerant piping is used to connect the indoor
unit to the outdoor unit.
13

4 Operation
4.1 General notes
The indoor unit is easily operated using the
standard infrared remote control. The indoor unit
beeps to acknowledge the correct transmission of
data. If it is not possible to program the indoor unit
with the remote control, then it can also be man-
ually operated.
Manual mode
The indoor unit can also be switched on manually
if the infrared remote control is lost/defective.
Manual operation is intended for emergency oper-
ation and is not suitable for basic unit operation.
Please replace the remote control. The key for
manual activation is located below the housing
cover on the right side.
The following settings apply for manual operation:
Pressing once: Automatic mode,
Pressing twice: Cooling mode,
Pressing three times: Unit OFF
Infrared remote control
The infrared remote control sends the programmed
settings a distance of up to 6 m to the receiver of
the indoor unit. Data will only be received correctly
if the remote control is pointed at the receiver and
no objects are obstructing the transmission path.
Two AAA batteries must be inserted into the
remote control in preparation. To do so, remove
the flap from the battery compartment and insert
the batteries the correct way around (see mark-
ings). Removing the batteries causes all stored
data to be lost. The remote control will then access
the default settings, which you are free to cus-
tomise at any time.
max. 6 m
Fig. 6: Maximum distance
Alarms are indicated by a code (see chapter
Troubleshooting and customer service).
NOTICE!
Immediately replace flat batteries with a new
set, otherwise there is a risk of leakage. It is
recommended that the batteries are removed if
the equipment is shut down for longer periods.
Help save on energy consumption in stand-by
mode! If the device, system or component is not
in use, we recommend disconnecting the power
supply. Components with a safety function is
excluded from our recommendation!
4.2 Display on indoor unit
Display
1
Fig. 7: Display
1: Display of coded error messages, room and
target temperature
REMKO ATY series
14

4.3 Keys on the remote control
6
8
11
147
9
10
12
13
2
1
4
3
5
Fig. 8: Keys on the remote control
1
"ON/OFF" key
Press this key to switch the air conditioning unit on
and off.
2
Operating mode selection
This key is used to set the desired operating mode.
The automatic, cooling, dehumidification, heating
and recirculation modes are available.
The automatic mode is only available to a limited
degree with multi-split applications (see note
Ä on page 18)
3
Fan speed
Use this key to select the desired fan speed. The
automatic, low, medium and high functions are
available. Note: In the dehumidification mode, the
fan speed cannot be set manually.
4
"SLEEP" key
Activates/deactivates the "SLEEP" function.
Pressing this key will automatically increase or
decrease the target temperature by 1 °C within an
hour in cooling mode and heating mode respec-
tively. Press this key to maintain the most conven-
ient temperature and save energy. This function is
only available in "Cooling", "Heating" and "Auto"
modes. If the unit is working in "SLEEP" mode, this
activity is interrupted by pressing the "MODE",
"FAN", "Speed" or "ON/OFF" keys.
5
"FRESH" key
Press this key to activate/deactivate the ion gener-
ator (air freshener).
6
"TURBO" key
Activation of the turbo function makes it possible to
reach the setpoint in cooling or heating mode as
fast as possible.
7
"SELF CLEAN" key (not available)
This activates the self-clean function on the unit.
8
“ARROW UP” and “ARROW DOWN” keys
“ARROW UP” key
Press the key in order to increase the setpoint in 1
°C steps to a maximum 30°C.
“ARROW DOWN” key
Press the key in order to reduce the setpoint in 1°C
steps to a minimum 17°C.
15

9
“SILENCE/FP” key
Activates/deactivates the silent mode. Pressing the
key for longer than 2 seconds activates the unit's
frost protection function.
In silent unit mode, the compressor runs at a lower
frequency, and the indoor unit fan rotates at a
slower speed. This obtains particularly silent unit
operation.
The frost protection function can only be activated
in heating mode. The unit operates with a fixed
setpoint of 8°C. The indoor unit displays "FP".
Pressing the ON/OFF, SLEEP, FP, Mode, FAN or
up or down arrow key, the frost protection function
is deactivated.
Note please!
Both functions are not available when con-
necting to the MVT unit series!
10
"TIMER ON" key
Press this key to activate the unit start delay time.
Each press of this key increases the delay time by
30 minutes. When the set time on the display
exceeds 10.0, each press of the button increases
the set time by 60 minutes. To deactivate the delay
time, set the time to 0.0.
11
"TIMER OFF" key
This key can be used to program the delayed
switch-off time. Each press of this key increases
the switch-off time by 30 minutes. When the set
time on the display exceeds 10.0, each press of
the button increases the set time by 60 minutes. To
deactivate the switch-off time, set the time to 0.0.
12
3-D swing mode
Press this key to start or stop the swing mode.
With the 2-point key, you can adjust the horizontal
fin on the left side and the vertical fin on the right
side. Press this key once to change the angle by 6
degrees. Pressing the key for 2 seconds stops the
swing function. When the swing function is
stopped, LC appears on the display for three sec-
onds.
13
"FOLLOW ME" key
This key can be used to activate/deactivate the
FOLLOW ME function. In this mode, the room tem-
perature is measured on the remote control. This
sends a signal to the indoor unit every 3 minutes. If
the remote control does not send a signal to the
indoor unit for 7 minutes, this mode is automati-
cally deactivated.
14
"LED" key
This activates the display on the indoor unit.
This is only possible if the display has been auto-
matically switched off by the integrated light indi-
cator.
REMKO ATY series
16

Indicators on the LCD
2
1
4
36
9
8
10
5
7
11
13 12
Fig. 9: Indicators on the LCD
1: Mode indicator - shows the current operating
modes, including Auto ( ), Cooling ( ),
Dehumidification ( ), Heating ( ), Fan ( )
and back to Auto ( ) mode.
2: Signal transmission symbol. This symbol
appears when signals are being transmitted
from the remote control to the indoor unit.
3: ON/OFF symbol. This symbol appears when
the "ON/OFF" key is pressed. Pressing this
key again causes the indicator to go out.
4: TIMER ON symbol. This symbol appears
when TIMER ON is switched on.
5: ECO function (not available)
6: TIMER OFF symbol. This symbol appears
when TIMER OFF is switched on.
7: Battery charge status (weak)
8: Sleep symbol. This symbol appears when the
"Sleep" function is activated. Pressing this key
again causes the indicator to go out.
9: Temperature/Timer symbol. Shows the tem-
perature setting (-17°C~30°C). If "FAN" mode
is selected, the temperature setting is not dis-
played. In Timer mode, the ON and OFF set-
tings appear for the TIMER.
10: FOLLOW ME symbol. This symbol appears
when the "Follow me" function is activated.
11: Display of ion generator active (optional)
12: Fan speed symbol. This is where the selected
fan speeds are displayed: AUTO (no indicator)
and the three fan speed settings: (slow),
(medium) and
(fast). The fan speed is set to "Automatic"
when either "Auto" or "Dehumidification" mode
is activated.
13: Silent mode active (optional)
The illustration of the LCD with all of the sym-
bols present is only intended to provide a
clearer overview. During operation, only those
symbols relevant to the respective functions
appear on the display.
Key functions
A symbol is shown on the display to indicate that
the settings are being transferred.
“Auto” mode (please observe notes!)
Make sure that the indoor unit is connected to the
power supply, and is switched on.
The operating mode indicator on the display of the
indoor unit begins to flash.
1. Press the "MODE" key to select "Auto"
mode.
2. Press the "Arrow up/down" key to set the
desired temperature. The temperature can
be set between 17 and 30°C, in increments
of 1°C.
3. Press the "ON/OFF" key to switch on the air
conditioning unit.
1
3
2
Fig. 10: "Auto" mode
17

Important Note
In "Automatic" mode, the cooling unit automati-
cally chooses between cooling, recirculation
and heating operation.
In multi-split systems that can either cool or
heat, a mode conflict therefore occurs when
using “Automatic” mode (error P5). In order to
prevent this error, use “Cooling” or “Heating”
operating mode for all indoor units.
"Cooling", "Heating" and "Recirculation" mode
Make sure that the indoor unit is connected to the
power supply, and is switched on.
1. Press the "MODE" key to select from oper-
ating modes "Cooling", "Heating" or "Recircu-
lation".
2. Press the "Arrow up/down" key to set the
desired temperature. The temperature can
be set between 17 and 30°C, in increments
of 1°C.
3. Press the "FAN" key to select from the four
fan speeds (Auto, slow, medium and fast).
4. Press the "ON/OFF" key to switch on the air
conditioning unit.
1
4
2
3
Fig. 11: "Cooling", "Heating" and "Recirculation"
mode
"Dehumidification" mode
Make sure that the indoor unit is connected to the
power supply, and is switched on.
The operating mode indicator on the display of the
indoor unit begins to flash.
1. Press the "MODE" key to select "Dehumidifi-
cation" mode.
2. The temperature setting on the remote con-
trol has no effect on unit operation.
3. Press the "ON/OFF" key to switch on the air
conditioning unit.
1
3
2
Fig. 12: "Dehumidification" mode
In the “Dehumidification” mode, manual selec-
tion of the fan speed is not possible! Please
note that temperature pre-selection is not pos-
sible and the dehumidified room can cool dra-
matically!
REMKO ATY series
18

"Timer" mode
Press the "TIMER ON" key to set the "switch-on
time" and the "TIMER OFF" key to set the "switch-
off" time for the unit.
Setting the “switch-on time”
1. Press the "TIMER ON" key. The remote con-
trol shows "TIMER ON", the last "switch-on
time" setting and the symbol "H" appear on
the display. The unit is now ready to reset the
"switch-on time" and to start "TIMER ON"
mode.
2. Press the "TIMER ON" key again to set the
desired "switch-on time". Each time the key
is pressed, the time is increased by half an
hour between 0 and 10 hours, and by an
hour between 10 and 24 hours.
3. Once these settings have been made, there
is a one second delay before the remote con-
trol transmits the signal to the indoor unit.
Then, after approx. two seconds, the "H"
symbol disappears from the LCD display, and
the set temperature appears again on the
display.
2
1
Fig. 13: "Timer" mode
Setting the “switch-off time”
1. Press the "TIMER OFF" key. The remote
control shows "TIMER OFF", the last "switch-
off time" setting and the symbol "H" appear
on the display. The unit is now ready to reset
the "switch-off time" and to stop "TIMER
OFF" mode.
2. Press the "TIMER OFF" key again to set the
desired "switch-off time". Each time the key
is pressed, the time is increased by half an
hour between 0 and 10 hours, and by an
hour between 10 and 24 hours.
3. Once these settings have been made, there
is a one second delay before the remote con-
trol transmits the signal to the indoor unit.
Then, after approx. two seconds, the "H"
symbol disappears from the LCD display, and
the set temperature appears again on the
display.
–When Timer mode is selected, the remote
control automatically transfers the timer
signal to the indoor unit for the specified
period of time. Therefore, you should hold
the remote control in a location where it can
transfer the signal to the indoor unit without
interference.
–The effective operation for the time settings
by the remote control for the timer function
is restricted to the following settings:
0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0,
5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10,
11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22, 23 and 24.
19

Example TIMER function settings
"TIMER ON" (Auto on mode)
Example:
You want the air conditioning unit to switch on 2
hours from the time it was programmed.
1. Press the "TIMER ON" key. The last oper-
ating time setting for the timer, and the "H"
symbols, appear on the display.
2. Press the "TIMER ON" key until the desired
start time is shown in the "TIMER ON" area
on the remote control.
3. Wait for 3 seconds and the temperature
appears again in this area of the digital dis-
play. The "TIMER ON" indicator stays lit, and
this function is activated.
Start
Off
2 hours laterSet time
Fig. 14: "TIMER ON" example
"TIMER OFF" (Auto off mode)
Example:
You want the air conditioning unit to switch off 4
hours from the time it was programmed.
1. Press the "TIMER OFF" key. The last oper-
ating time setting for the timer, and the "H"
symbols, appear on the display.
2. Press the "TIMER OFF" key until "10H" is
shown in the "TIMER OFF" area on the
remote control.
3. Wait for 3 seconds and the temperature
appears again in this area of the digital dis-
play. The "TIMER OFF" indicator stays lit,
and this function is activated.
Stop
On
4 hours laterSet time
Fig. 15: "TIMER OFF" example
Combined TIMER (setting "TIMER ON" and
"TIMER OFF" at the same time)
"TIMER OFF ð "TIMER ON"
(On ð Stop ð Start)
Example:
You want the air conditioning unit to switch off in
two hours from the time it was programmed, and
switch back on ten hours later.
1. Press the "TIMER OFF" key.
2. Press the "TIMER OFF" key again until the
desired stop time is shown in the "TIMER
OFF" area on the remote control.
3. Press the "TIMER ON" key.
4. Press the "TIMER ON" key again until "10H"
is shown in the "TIMER ON" area on the
remote control.
5. Wait for 3 seconds and the temperature
appears again in this area of the digital dis-
play. The "TIMER ON" and "TIMER OFF"
indicators stay lit, and this function is acti-
vated.
On
Set time
Stop
Start
2 hours later
after setting 10 hours later after setting
Fig. 16: "TIMER OFF" / "TIMER ON" example
REMKO ATY series
20