REMKO RXT 523 DC User manual

Assembly and operating instructions
Read the instructions prior to performing any task!
REMKO RXT...DC
RXT 523 DC, RXT 683 DC, RXT 1053 DC, RXT 1403 DC
Inverter wall/ceiling-mounted unit with split design
0138-2016-06 Edition 1, en_GB

Installation and operating instructions (translation of the orig-
inal)
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............................................................................................................... 5
1.6 Safety notes for the operator........................................................................................................... 6
1.7 Safety notes for installation, maintenance and inspection.............................................................. 6
1.8 Unauthorised modification and changes......................................................................................... 6
1.9 Intended use................................................................................................................................... 6
1.10 Warranty........................................................................................................................................ 6
1.11 Transport and packaging.............................................................................................................. 7
1.12 Environmental protection and recycling........................................................................................ 7
2 Technical data....................................................................................................................................... 8
2.1 Unit data.......................................................................................................................................... 8
2.2 Unit dimensions ............................................................................................................................ 11
2.3 Performance curves for heating and cooling ................................................................................ 12
3 Design and function............................................................................................................................ 16
3.1 Unit description............................................................................................................................. 16
4 Operation............................................................................................................................................. 17
4.1 General notes................................................................................................................................ 17
4.2 Display on indoor unit.................................................................................................................... 18
4.3 Keys on the remote control........................................................................................................... 19
5 Installation instructions for qualified personnel.............................................................................. 25
5.1 Important notes prior to installation............................................................................................... 25
5.2 Selection of installation location ................................................................................................... 25
5.3 Installation materials..................................................................................................................... 26
5.4 Wall openings................................................................................................................................ 27
5.5 Fastening options for the indoor unit............................................................................................. 27
5.6 Minimum clearances..................................................................................................................... 29
5.7 Connection variants...................................................................................................................... 29
5.8 Oil return measures....................................................................................................................... 29
6 Installation........................................................................................................................................... 30
6.1 Preparations for installation........................................................................................................... 30
6.2 Installation of the indoor unit......................................................................................................... 30
6.3 Connection of refrigerant piping.................................................................................................... 31
6.4 Additional notes on connecting the refrigerant piping................................................................... 33
6.5 Leak testing................................................................................................................................... 33
6.6 Adding refrigerant.......................................................................................................................... 34
7 Condensate drainage connection and safe drainage...................................................................... 34
8Electrical wiring................................................................................................................................... 36
8.1 General notes................................................................................................................................ 36
8.2 Connecting the indoor unit............................................................................................................ 36
8.3 Outdoor unit connection................................................................................................................ 37
8.4 Electrical wiring diagram............................................................................................................... 37
8.5 Electrical drawings........................................................................................................................ 40
3

9 Before commissioning....................................................................................................................... 46
10 Commissioning................................................................................................................................... 46
11 Shut-down............................................................................................................................................ 47
12 Troubleshooting, customer service and fault analysis................................................................... 48
12.1 Troubleshooting and customer service....................................................................................... 48
12.2 Indoor unit fault analysis............................................................................................................. 51
13 Care and maintenance........................................................................................................................ 64
14 Exploded view and spare parts lists................................................................................................. 66
14.1 Exploded view - Indoor unit RXT 523-683 DC ........................................................................... 66
14.2 Spare parts list - Indoor unit RXT 523-683 DC........................................................................... 67
14.3 Exploded view - Indoor unit RXT 1053-1403 DC ....................................................................... 68
14.4 Spare parts list - Indoor unit RXT 1053-1403 DC....................................................................... 69
14.5 Exploded view - Outdoor unit RXT 523 DC ................................................................................ 71
14.6 Spare parts list - Outdoor unit RXT 523 DC................................................................................ 72
14.7 Exploded view - Outdoor unit RXT 683 DC ................................................................................ 73
14.8 Spare parts list - Outdoor unit RXT 683 DC................................................................................ 74
14.9 Exploded view - Outdoor unit RXT 1053 DC .............................................................................. 75
14.10 Spare parts list - Outdoor unit RXT 1053 DC............................................................................ 76
14.11 Exploded view - Outdoor unit RXT 1403 DC ............................................................................ 78
14.12 Spare parts list - Outdoor unit RXT 1403 DC............................................................................ 79
15 Index..................................................................................................................................................... 81
REMKO RXT...DC
4

1 Safety and
usage instructions
1.1 General safety notes
Carefully read the operating manual before com-
missioning the units for the first time. It contains
useful tips and notes such as hazard warnings to
prevent personal injury and material damage.
Failure to follow the directions in this manual not
only presents a danger to people, the environment
and the system itself, but will void any claims for
liability.
Keep this operating manual and the refrigerant
data sheet near to the units.
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.
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.
5

1.6 Safety notes 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 (grille) 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 certain unit parts or components
may lead to burns or injury.
nThe units and components must not be
exposed to any mechanical load, extreme
levels of humidity or extreme temperature.
nSpaces in which refrigerant can leak sufficient
to load and vent. Otherwise there is danger of
suffocation.
nAll housing parts and device openings, e.g. air
inlets and outlets, must be free from foreign
objects, fluids or gases.
nThe units must be inspected by a service tech-
nician at least once annually. Visual inspec-
tions 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
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.
nLocal regulations and laws such as 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.
nMobile units must be set up securely on suit-
able surfaces and in an upright position. Sta-
tionary units must be permanently installed for
operation.
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 must not be altered or
bypassed.
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.
REMKO RXT...DC
6

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!
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.
7

2 Technical data
2.1 Unit data
Series RXT 523 DC RXT 683 DC RXT 1053 DC RXT 1403 DC
Operating mode Inverter wall/ceiling-mounted room air conditioner combination
for cooling and heating
Nominal cooling output 1) kW 5.30
(0.80-6.20)
7.10
(1.20-8.20)
10.50
(2.90-12.00)
14.00
(4.10-16.40)
Energy efficiency ratio SEER 1) 6.5 6.1 6.1 6.1
Power consumpt., annual, QCE 3) kWh 285 402 602 803
Energy efficiency ratio, cooling 1) A++ A++ A++ A++
Nominal heat capacity 2) kW 4.90
(0.90-7.00)
5.80
(1.20-8.70)
10.30
(2.60-13.20)
11.80
(4.40-18.50)
Energy efficiency ratio SCOP 4) 4.0 4.0 4.0 4.0
Power consumpt., annual, QHE 3) kWh 1715 2030 3605 4130
Energy efficiency ratio, heating 2) A+ A+ A+ A+
Rated power consumption,
electrical cooling 1) kW 1.63 2.29 4.06 5.19
Rated elec. curr. consump.,
cooling 1) A 7.50 10.40 7.00 9.00
Rated power consumption,
electrical heating 2) kW 1.46 1.90 2.98 4.81
Rated elec. curr. consump.,
heating 2) A 6.70 8.70 5.20 8.30
Max. power consumption kW 2.51 3.16 4.69 6.59
Max. current consumption A 11.50 14.10 8.10 11.40
EDP no. 1619510 1619520 1619530 1619540
1) Air inlet temp. TK 27°C / FK 19°C, outside temperature TK 35°C, FK 24°C, max. air flow volume,
5m 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
REMKO RXT...DC
8

Data specific to indoor unit RXT 523 DC
IT
RXT 683 DC
IT
RXT 1053 DC
IT
RXT 1403 DC
IT
Power supply V/Ph/
Hz 230 / 1~ / 50
Application area (room vol.)
approx. m3160 230 320 470
Adjustment range room
temperature °C +17 to +30
Operating range °C/
RH % +17 to +32 / 35 to 65
Air flow volume per level m³/h 700/800/
900
850/1050/
1180
1403/1767/
2048
1400/1800/
2100
Sound pressure level per speed
setting 5) dB (A) 34/39/44 42/48/53 40/46/52 41/48/56
Sound power (turbo mode) dB(A) 65 65 67 72
Enclosure class IP X0
Condensate drainage connection mm 25
Dimensions: H/W/D mm 675 / 1068 / 235 675 / 1650 / 235
Weight kg 26.0 25.0 40.0 38.0
EDP no. 1619512 1619522 1619532 1619542
5) At distance of 1m in the open air; specified values are maximum values
9

Data specific to outdoor unit RXT 523 DC
AT
RXT 683 DC
AT
RXT 1053 DC
AT
RXT 1403 DC
AT
Power supply V/Ph/
Hz 230 / 1~ / 50 400 / 3~ /50
Operating range, cooling °C +5 to +50 7)
Operating range, heating °C +5 to +24 7)
Air flow rate, max. m³/h 2100 2700 4300 6800
Enclosure class IP 24
Sound pressure level 5) dB (A) 57 61 62 65
Sound power level max. dB (A) 64 65 67 72
Refrigerant 6) R410A
Refrigerant, basic capacity kg 1,48 1,95 3,20 4,00
CO2 equivalent t 2.88 3.09 4.07 6.68
Max. operating pressure kPa 4200 / 1500
Refrigerant,
additional quantity >5m g/m 30 30 30 30
Refrigerant piping, max. length m 30 50 65 65
Refrigerant piping, max. height m 15 20 30 30
Refrigerant connection
Liquid line
Inches
(mm) 1/4 (6.35) 3/8 (9.52) 3/8 (9.52) 3/8 (9.52)
Refrigerant connection
Suction pipe
Inches
(mm) 1/2 (12.70) 5/8 (15.90) 5/8 (15.90) 5/8 (15.90)
Dimensions: H/W/D mm 554/800/333 702/845/363 810/946/410 1333/952/410
Weight kg 35.5 49.0 78.9 108.1
EDP no. 1619446 1619456 1619466 1619476
5) At distance of 1m in the open air; specified values are maximum values
6) Contains greenhouse gas per the Kyoto protocol, GWP 2088 (for further information, see chapter "Adding refrigerant")
7) This can be extended to -15°C with the appropriate accessory kit
REMKO RXT...DC
10

2.2 Unit dimensions
Outdoor units
D
E
B
AC
Fig. 1: Dimensions RXT 523-1403 DC AT (all measurements in mm)
Measurements (mm) A B C D E
RXT 523 DC AT 800 554 333 514 340
RXT 683 DC AT 845 702 363 540 350
RXT 1053 DC AT 946 810 410 673 403
RXT 1403 DC AT 1333 952 410 634 404
Indoor units
B
C
A
Fig. 2: Unit dimensions, indoor unit RXT 523-1403 DC IT
Measurements (mm) A B C
RXT 523 DC IT 675 1068 235
RXT 683 DC IT 675 1068 235
RXT 1053 DC IT 675 1650 235
RXT 1403 DC IT 675 1650 235
We reserve the right to modify the dimensions and design as part of the ongoing techn. developm. process.
11

2.3 Performance curves for heating and cooling
Heating capacity RXT 523 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
-15 -10 -5 0 7 10
2
1
3
A[°C]
Fig. 3: Performance curves, heating RXT 523 DC (data for room temperature FK 27 °C/TK 20°C)
A: Outside temperature
1: COP
2: Heating capacity in kW
3: Power consumption in kW
Outside temperature in °C -15 -10 -5 0 7 10
Heating capacity in kW 3.34 3.62 3.90 4.57 5.57 6.07
Power consumption in kW 1.17 1.24 1.31 1.39 1.46 1.50
COP 2.86 2.92 2.97 3.29 3.82 4.04
Cooling capacity RXT 523 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
20 25 30 35 40
2
1
3
A[°C]
Fig. 4: Performance curves, cooling RXT 523 DC (data for room temperature FK 27 °C/TK 19°C)
A: Outside temperature
1: EER
2: Cooling capacity in kW
3: Power consumption in kW
Outside temperature in °C 20 25 30 35 40
Cooling capacity in kW 6.01 5.78 5.52 5.28 5.01
Power consumption in kW 1.27 1.39 1.50 1.63 1.74
EER 4.73 4.17 3.68 3.24 2.87
REMKO RXT...DC
12

Heating capacity RXT 683 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
7,00
7,50
8,00
8,50
-15 -10 -5 0 7 10
2
1
3
A[°C]
Fig. 5: Performance curves, heating RXT 683 DC (data for room temperature FK 27 °C/TK 20°C)
A: Outside temperature
1: COP
2: Heating capacity in kW
3: Power consumption in kW
Outside temperature in °C -15 -10 -5 0 7 10
Heating capacity in kW 4.22 4.57 4.92 5.76 7.03 7.66
Power consumption in kW 1.52 1.62 1.71 1.81 1.90 1.96
COP 2.78 2.83 2.88 3.19 3.70 3.92
Cooling capacity RXT 683 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
7,00
7,50
8,00
8,50
20 25 30 35 40
2
1
3
A[°C]
Fig. 6: Performance curves, cooling RXT 683 DC (data for room temperature FK 27 °C/TK 19°C)
A: Outside temperature
1: EER
2: Cooling capacity in kW
3: Power consumption in kW
Outside temperature in °C 20 25 30 35 40
Cooling capacity in kW 8.02 7.70 7.36 7.03 6.68
Power consumption in kW 1.78 1.94 2.10 2.29 2.44
EER 4.50 3.97 3.50 3.08 2.73
13

Heating capacity RXT 1053 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
7,00
7,50
8,00
8,50
9,00
9,50
10,00
10,50
11,00
11,50
12,00
12,50
13,00
-15 -10 -5 0 7 10
2
1
3
A[°C]
Fig. 7: Performance curves, heating RXT 1053 DC (data for room temperature FK 27 °C/TK 20°C)
A: Outside temperature
1: COP
2: Heating capacity in kW
3: Power consumption in kW
Outside temperature in °C -15 -10 -5 0 7 10
Heating capacity in kW 6.68 7.23 7.79 9.13 11.13 12.13
Power consumption in kW 2.39 2.54 2.69 2.84 2.99 3.07
COP 2.80 2.85 2.90 3.22 3.73 3.95
Cooling capacity RXT 1053 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
7,00
7,50
8,00
8,50
9,00
9,50
10,00
10,50
11,00
11,50
12,00
12,50
13,00
20 25 30 35 40
2
1
3
A[°C]
Fig. 8: Performance curves, cooling RXT 1053 DC (data for room temperature FK 27 °C/TK 19°C)
A: Outside temperature
1: EER
2: Cooling capacity in kW
3: Power consumption in kW
Outside temperature in °C 20 25 30 35 40
Cooling capacity in kW 12.03 11.55 11.04 10.55 10.02
Power consumption in kW 3.17 3.45 3.74 4.06 4.34
EER 3.80 3.35 2.96 2.60 2.31
REMKO RXT...DC
14

Heating capacity RXT 1403 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
7,00
7,50
8,00
8,50
9,00
9,50
10,00
10,50
11,00
11,50
12,00
12,50
13,00
13,50
14,00
14,50
15,00
15,50
16,00
16,50
17,00
17,50
18,00
18,50
19,00
-15 -10 -5 0 7 10
2
1
3
A[°C]
Fig. 9: Performance curves, heating RXT 1403 DC (data for room temperature FK 27 °C/TK 20°C)
A: Outside temperature
1: COP
2: Heating capacity in kW
3: Power consumption in kW
Outside temperature in °C -15 -10 -5 0 7 10
Heating capacity in kW 9.85 10.67 11.49 13.46 16.41 17.89
Power consumption in kW 3.85 4.09 4.33 4.57 4.81 4.95
COP 2.56 2.61 2.65 2.94 3.41 3.61
Cooling capacity RXT 1403 DC
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
5,50
6,00
6,50
7,00
7,50
8,00
8,50
9,00
9,50
10,00
10,50
11,00
11,50
12,00
12,50
13,00
13,50
14,00
14,50
15,00
15,50
16,00
16,50
17,00
20 25 30 35 40
2
1
3
A[°C]
Fig. 10: Performance curves, cooling RXT 1403 DC (data for room temperature FK 27 °C/TK 19°C)
A: Outside temperature
1: EER
2: Cooling capacity in kW
3: Power consumption in kW
Outside temperature in °C 20 25 30 35 40
Cooling capacity in kW 16.04 15.41 14.72 14.07 13.37
Power consumption in kW 4.05 4.41 4.77 5.19 5.55
EER 3.96 3.49 3.08 2.71 2.41
15

3 Design and function
3.1 Unit description
The RXT room air conditioners have a REMKO
RXT...DC AT outdoor unit as well as a RXT...DC 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 outdoor unit consists of a cooling cycle with
compressor, fin condenser, condenser fan,
reversing valve and electronic expansion valve.
The outdoor unit is controlled by the regulation of
the indoor unit.
The indoor unit is designed both for both wall and
ceiling-mounted operation in indoor areas. It is
operated by an infrared remote control. The indoor
unit consists of a fin evaporator, evaporator fan,
controller and condensate tray.
B
A
4
3
5
6
1
2
3
7
8
9
Fig. 11: System layout RXT 523-1403 DC
A: Outdoor area / B: Indoor area
1: Indoor unit / 2: Outdoor unit
3: Condensate drainage line / 4: Condenser fan
5: Power supply / 6: Shut-off valve
7: Suction pipes / 8: Injection pipes
9: Control lines
Floor consoles, wall consoles, refrigerant piping,
wired remote controls and condensate pumps are
available as accessories.
Refrigerant piping is used to connect the indoor
unit to the outdoor unit.
1
EEV
RXT1051 DC
M
M
P S H
T1
T2
T3
TE
T5
PSL
T4
T3
T2
M3
M2
M1
PSL
PSH
T1
V1
M
M
TE
P S H
T1
T2
T3
T5
PSL
M1 M3
T4
T3
T2
M2
PSL
PSH
T1
V1
EEV
2
A B
A B
FLT
FLT
FLT
FLT
OEL
T5
T5
Fig. 12: Cooling cycle schematic
A: Outdoor area
B: Indoor area
1: RXT 523-683 DC
2: RXT 1053-1403 DC
M1: Condenser fan
M2: Compressor
M3: Evaporator fan IT
V1: Changeover valve C/H
EEV: Electr. expansion valve
FLT: Filter
OEL: Oil return line
PSH: High pressure switch AT
PSL: Low pressure switch AT
T1: Probe, evaporator IT
T2: Probe, air inlet IT
T3: Probe, condenser AT
T4: Probe, air inlet AT
T5: Probe, heat gas AT
REMKO RXT...DC
16

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 started manually. By
pressing the "Manual" key (on the display board)
multiple times, the unit can be activated with the
following functions:
The following settings apply for manual operation:
Pressing once: Automatic mode 24°C, fan speed
automatic
Pressing twice: Cooling mode, fan speed high
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).
max. 6 m
<block y.linktarget="true" y.validity.allowed="true" y.keep.together.within.page="false" ip="none" y.id="ID_79026f118af378b2c0a80aa000dde74d" y.validity.mode="positive" y.io.validity.mode="positive"><title y.commentable="true" y.id="ID_2df61a8af378b2c0a80aa0007c9fdc" y.linktarget="true" y.validity.allowed="true" y.validity.mode="positive" y.io.validity.mode="positive"><?xm-replace_text {Block title}?></title><p y.validity.allowed="true" y.commentable="true" y.id="ID_8ad17fa18af378b2c0a80aa001e35c28" y.validity.mode="positive">Das Innengerät wird komfortabel mit der serienmäßigen Infrarot-Fernbedienung bedient. Die ordnungsgemäße Datenübermittlung wird vom Innengerät mit einem Signalton quittiert. Sollte eine Programmierung über die
Infrarot-Fernbedienung nicht möglich sein, kann das Innengerät auch manuell bedient werden. Optional kann das Innengerät auch mit einer Kabelfernbedienung bedient werden.</p></block><block y.linktarget="true" y.validity.allowed="true" y.keep.together.within.page="true" ip="none" y.id="ID_adea262699646b1ac0a80aa00124eb02" y.validity.mode="positive" y.io.validity.mode="positive"><title y.commentable="true" y.id="ID_822fed5d99646b1ac0a80aa000c0eb90" y.linktarget="true" y.validity.allowed="true" y.validity.mode="positive" y.io.validity.mode="positive">Manuelle Bedienung</title><xe y.id="ID_72092e01cc69eeb1c0a80aa0001072e8"><primary y.commentable="true" y.id="ID_f2b45117cc69eeb1c0a80aa001e812b8">Manuelle Bedienung</primary></xe><p y.validity.allowed="true" y.commentable="true" y.id="ID_59dea67f99646b1ac0a80aa001a94073" y.validity.mode="positive">Die Innengeräte können manuell in Betrieb genommen werden.
Durch Betätigen der Taste "MANUAL" am Empfangsteil der Abdeckung
wird erst der Automatikmodus, dann der Kühlmodus aktiviert. Das dritte Betätigen schaltet das Gerät aus. Ein erneutes Betätigen wechselt zurück zum Automatikmodus.
Innerhalb der gesamten Anlage wird das Gerät, welches den manuell eingestellten Kühlmodus besitzt zum Führungsgerät.
Im manuellen Betrieb gelten die folgenden Einstellungen:</p><p y.validity.allowed="true" y.commentable="true" y.id="ID_3a9a283d99646b1ac0a80aa000c67f7f" y.validity.mode="positive">
Kühlbetrieb: 24 °C,
Ventilatorgeschwindigkeit: AUTO
</p><p y.validity.allowed="true" y.commentable="true" y.id="ID_3d36471699646b1ac0a80aa001dc8c12" y.validity.mode="positive">Heizbetrieb: 26 °C,
Ventilatorgeschwindigkeit: AUTO
</p><p y.validity.allowed="true" y.commentable="true" y.id="ID_bc86e04299646b1ac0a80aa000700630" y.validity.mode="positive">Durch Betätigen einer Taste der Infrarot-Fernbedienung wird der
manuelle Betrieb unterbrochen.</p><p y.validity.allowed="true" y.commentable="true" y.id="ID_960d3e6fe104f4f1c0a80aa0017e7896" y.validity.mode="positive"><b>Infrarot-Fernbedienung</b></p><xe y.id="ID_533d60fbcc69eeb1c0a80aa00124f630"><primary y.commentable="true" y.id="ID_8b358666cc69eeb1c0a80aa0019ef0e1">Infrarot-Fernbedienung</primary></xe><p y.validity.allowed="true" y.commentable="true" y.id="ID_01dbfb2899646b1ac0a80aa001c22414" y.validity.mode="positive">
Die Infrarot-Fernbedienung sendet die programmierten Einstellungen in einem Abstand von bis zu 6 m zum Empfangsteil des Innengerätes. Ein ungestörter Empfang der Daten ist nur möglich, wenn die Fernbedienung auf das Empfangsteil gerichtet und keine Gegenstände die Übertragung behindern.
</p><p y.validity.allowed="true" y.commentable="true" y.id="ID_f84708fc99646b1ac0a80aa000cea521" y.validity.mode="positive">Vorbereitend sind die im Lieferumfang bendlichen Batterien
(2 Stück, Typ AAA) in die Fernbedienung einzusetzen. Ziehen Sie dazu die Klappe des Batteriefachs ab und setzen die Batterien polungsrichtig ein (siehe Markierung).</p></block><block y.linktarget="true" y.validity.allowed="true" ip="none" y.id="ID_9cb8e18699646b1ac0a80aa000a63989" y.keep.together.within.page="false" y.validity.mode="positive" y.io.validity.mode="positive"><gure size="margin" y.linktarget="true" y.validity.allowed="true" y.commentable="true" ip="none" y.id="ID_b1c62b99ea33cfc0a80aa00177114f" y.validity.mode="positive"><img y.io.id="a7ef1e92cc0463e3c0a80aa00099319e" y.io.version="1" y.io.language="--" y.io.variant="--" y.io.name="COS-FB-Maximaler-Abstand" y.io.format="PNG72" y.reftype="bild" y.ref.io.types="me-imggif, me-imgjpeg, me-imgpng, me-imgsvg, me-imgti, me-imgpdf, me-imgeps, me-imgdes" y.io.validity.mode="positive" y.validity.mode="positive" yhref="https://xml24.kothes.de:443/cmsweb/view/a7ef1e92cc0463e3c0a80aa00099319e/1/--/--/PNG72/previewtrue/745" y.io.owner="pschimczik" y.io.status="Approved"/><subtitle y.commentable="true" y.id="ID_45b64fd899ea33cfc0a80aa000118fa1">Maximaler Abstand</subtitle></gure></block><block y.linktarget="true" y.validity.allowed="true" y.keep.together.within.page="false" ip="none" y.id="ID_9303000c99ea33cfc0a80aa000ec972a" y.validity.mode="positive" y.io.validity.mode="positive"><note-ref y.io.id="c3fcca3999e7c4d7c0a80aa00075e61d" y.io.version="1" y.io.language="de" y.io.variant="DE" y.io.name="Störungen werden codiert angezeigt" y.reftype="text" y.validity.allowed="true" y.id="ID_cc37889a99ea33cfc0a80aa000b86398" y.ref.io.types="me-note" y.validity.mode="positive"><note y.validity.allowed="true" y.id="ID_6aafc54d99e7c4d7c0a80aa001a18c" y.io.id="c3fcca3999e7c4d7c0a80aa00075e61d" y.io.version="1" y.io.language="de" y.io.variant="DE" y.io.format="" y.commentable="true" y.validity.mode="positive" y.io.validity.mode="positive" y.io.owner="pschimczik" y.io.status="Approved"><title y.commentable="true" y.id="ID_cab1857499e7c4d7c0a80aa001c6fcb0" y.linktarget="true" y.validity.allowed="true" y.validity.mode="positive" y.io.validity.mode="positive"><?xm-replace_text {Note title}?></title><p y.validity.allowed="true" y.commentable="true" y.id="ID_5f147d5399e7c4d7c0a80aa000f79d44" y.validity.mode="positive">Störungen werden codiert
angezeigt
(siehe Kapitel Störungsbeseitigung und Kundendienst).
</p></note></note-ref></block><block y.linktarget="true" y.validity.allowed="true" y.keep.together.within.page="false" ip="none" y.id="ID_4889bf3299ea33cfc0a80aa00192ab32" y.validity.mode="positive" y.io.validity.mode="positive"><notice-ref y.io.id="6ef454f799e959f5c0a80aa0017cf664" y.io.version="1" y.io.language="de" y.io.variant="DE" y.io.name="Entladene Batterien ersetzen" y.reftype="text" y.validity.allowed="true" y.id="ID_c3b85e1999ea33cfc0a80aa000257b18" y.ref.io.types="me-notice" y.validity.mode="positive"><notice y.validity.allowed="true" y.id="ID_12c4b32999e959f5c0a80aa001b1843f" y.io.id="6ef454f799e959f5c0a80aa0017cf664" y.io.version="1" y.io.language="de" y.io.variant="DE" y.io.format="" y.commentable="true" y.validity.mode="positive" y.io.validity.mode="positive" y.io.owner="pschimczik" y.io.status="Approved"><title y.commentable="true" y.id="ID_0a56f35d99e959f5c0a80aa0016164c4" y.linktarget="true" y.validity.allowed="true" y.validity.mode="positive" y.io.validity.mode="positive"><?xm-replace_text {Notice title}?></title><p y.validity.allowed="true" y.commentable="true" y.id="ID_5d6f9c5699e959f5c0a80aa0011e84" y.validity.mode="positive">Ersetzen Sie entladene Batterien sofort durch einen neuen Satz, da sonst die Gefahr des Auslaufens besteht. Bei längeren Außerbetriebnahmen empehlt es sich die Batterien zu entfernen.</p></notice></notice-ref></block><block y.linktarget="true" y.validity.allowed="true" y.keep.together.within.page="false" ip="none" y.id="ID_3fa8dc8f7c8aeaedc0a80aa001a42c28" y.validity.mode="positive" y.io.validity.mode="positive"><note-ref y.io.id="bd677a507c893df9c0a80aa0006b7af7" y.io.version="1" y.io.language="de" y.io.variant="DE" y.io.name="Energie sparen mittels Stand-by-Modus" y.reftype="text" y.validity.allowed="true" y.id="ID_30ae5ea47c8aeaedc0a80aa0014f3168" y.ref.io.types="me-note" y.validity.mode="positive"><note y.validity.allowed="true" y.commentable="true" y.id="ID_cb6774c17c893df9c0a80aa000def2a8" y.io.id="bd677a507c893df9c0a80aa0006b7af7" y.io.version="1" y.io.language="de" y.io.variant="DE" y.io.format="" y.validity.mode="positive" y.io.validity.mode="positive" y.io.owner="pschimczik" y.io.status="Approved"><title y.commentable="true" y.id="ID_8afa74477c893df9c0a80aa0010d2f89" y.linktarget="true" y.validity.allowed="true" y.validity.mode="positive" y.io.validity.mode="positive"><?xm-replace_text {Note title}?></title><p y.validity.allowed="true" y.commentable="true" y.id="ID_4473aa437c893df9c0a80aa000abf90b" y.validity.mode="positive">Helfen Sie mit, Energieverbräuche im Stand-By-Betrieb einzusparen! Wird das Gerät, die Anlage oder die Komponente nicht verwendet, empfehlen wir eine Unterbrechung der Spannungsversorgung.
Der Sicherheit dienende Komponenten unterliegen nicht unserer Empfehlung!</p></note></note-ref></block>
Fig. 13: Maximum distance
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.
17

Wired remote control
Connection of the optional wired remote control
1. The plug for connection of a wired remote
control is located behind the panel at the dis-
play board (Fig. 14). The 5-core cable,
coming from the display panel, is marked
with the designations "A-E" (Fig. 15).
Fig. 14: Indoor unit panel
Fig. 15: Display circuit board
Alarms are indicated by a code (see chapter
Troubleshooting and customer service).
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 func-
tion is excluded from our recommendation!
4.2 Display on indoor unit
Display on indoor unit
The LED indicators illuminate to indicate the set-
tings:
MANUAL TIMER
ALARM
OPERATION
DEF./FAN
1 2 3
5 6
4
7
Fig. 16: Display for setpoint/errors
1: Digital display
2: Manual operation
3: Operation display
4: Timer indicator
5: Unit for receiving signals from the remote con-
trol
6: Defrosting fan
7: Alarm indicator
REMKO RXT...DC
18

4.3 Keys on the remote control
6
8
11
147
9
10
12
13
2
1
4
3
5
Fig. 17: 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.
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 and heating mode respectively.
Press this key to maintain the most convenient
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 (no function)
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 (no function)
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.
9
“SILENCE/FP” key (no function)
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
Swing mode
Press this key to start or stop the swing mode.
With the 2-point key, you can change the fin set-
tings on the left side. The right key has no function.
Press this key once to change the angle by 6
degrees. Pressing the key for 2 seconds stops the
swing function.
19

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/deactivates the display on the indoor
unit.
Indicators on the LCD
2
1
4
36
9
8
10
5
7
11
13 12
Fig. 18: 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)
REMKO RXT...DC
20