REMKO MXT Series User manual

Operating and
installation instructions
Read the instructions prior to performing any task!
REMKO MXT series
MXT 264, MXT 354,
Wall chest for cooling and heating
0223-2021-02 Edition 2, 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............................................................................................................. 4
1.1 General safety notes....................................................................................................................... 4
1.2 Identification of notes...................................................................................................................... 4
1.3 Personnel qualifications.................................................................................................................. 4
1.4 Dangers of failure to observe the safety notes................................................................................ 4
1.5 Safety-conscious working............................................................................................................... 5
1.6 Safety instructions for the operator................................................................................................. 5
1.7 Safety notes for installation, maintenance and inspection ............................................................. 5
1.8 Unauthorised modification and changes......................................................................................... 6
1.9 Intended use................................................................................................................................... 6
1.10 Warranty........................................................................................................................................ 6
1.11 Transport and packaging............................................................................................................... 6
1.12 Environmental protection and recycling........................................................................................ 7
2 Technical data........................................................................................................................................ 8
2.1 Unit data.......................................................................................................................................... 8
2.2 Unit dimensions............................................................................................................................... 9
3 Design and function............................................................................................................................ 10
3.1 Unit description............................................................................................................................. 10
4 Operation............................................................................................................................................. 11
4.1 General notes................................................................................................................................ 11
4.2 Display on indoor unit.................................................................................................................... 12
4.3 Manual air distribution................................................................................................................... 13
4.4 Keys on the remote control........................................................................................................... 15
5 Installation instructions for qualified personnel.............................................................................. 23
6 Installation........................................................................................................................................... 24
7 Condensate drainage connection and safe drainage...................................................................... 25
8 Electrical wiring................................................................................................................................... 26
8.1 General notes................................................................................................................................ 26
8.2 Electrical wiring diagram............................................................................................................... 27
8.3 Unit type selection and temperature compensation...................................................................... 29
8.4 Electrical drawings........................................................................................................................ 30
9 Commissioning................................................................................................................................... 32
10 Troubleshooting and customer service............................................................................................ 33
11 Care and maintenance........................................................................................................................ 36
12 Exploded view of the unit and spare parts list................................................................................. 38
12.1 Exploded view of the unit ........................................................................................................... 38
12.2 Spare parts list............................................................................................................................ 39
13 Shutdown............................................................................................................................................. 40
14 Index..................................................................................................................................................... 41
3

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.
REMKO MXT series
4

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.
5

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!
REMKO MXT series
6

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 MXT 264 MXT 354
Operating mode
Wall chest for inverter multisplit
outdoor units for cooling and
heating
Nominal cooling output 1) kW 2.6 3.5
Nominal heat capacity 2) kW 2.9 3.5
Application area (room volume), approx. m380 110
Adjustment range, room temperature °C +17 to +30
Operating range °C/r.H.% +17 to +32 / 35-65
Refrigerant R32
Operating pressure, max. kPa 4200
Air flow volume per stage m3/h 450/580/680 360/470/550
Sound pressure level per stage 3) dB (A) 35/40/45 35/41/47
Sound power level max. dB (A) 56 58
Power supply V/Ph/Hz 230/1~/50
Enclosure class IP X 0
Electrical rated power consumption, cooling 1) W30 40
Electrical rated power consumption, heating 2) W36 48
Electrical rated current consumption, cooling 1) A0.13 0.17
Electrical rated current consumption, heating 2) A0.16 0.21
Refrigerant connection
Injection pipe
Inches
(mm) 1/4 (6.35) 1/4 (6.35)
Refrigerant connection
Suction pipe
Inches
(mm) 3/8 (9.52) 3/8 (9.52)
Condensate drainage connection mm 16
REMKO MXT series
8

Series MXT 264 MXT 354
Dimensions
Height mm 600
Width mm 700
Depth mm 210
Weight kg 13.5 15.0
EDP no. 1623400 1623402
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,
5 m pipe length
3) Distance 1 m free field
2.2 Unit dimensions
600
700 210
195
1
Fig. 1: Unit dimensions MXT 264-354 (All measurements in mm)
1: Mounting plate
We reserve the right to modify the dimensions and design as part of the ongoing technical development
process.
9

3 Design and function
3.1 Unit description
The indoor unit on the split-design compact wall
chests serves to extract heat from the indoor room
being cooled. The outdoor unit then expels this
heat to the outside.
If combined heating/cooling units are operated as
heaters, the heat absorbed by the outdoor unit can
be discharged by the indoor unit into the room
being heated.
The unit is designed to be mounted high up on the
wall, in an indoor area. It is operated by an infrared
remote control.
The indoor unit consists of a fin evaporator, evapo-
rator fan, controller and condensate tray. The
indoor unit can be combined with REMKO outdoor
units from the MVT 603 DC-1403 DC range that
provide sufficient combination options. The outdoor
unit is controlled by the regulation of the indoor
unit.
Condensate pumps are available as accessories.
B
A
4
5
6
1
2
3
7
8
9
3
Fig. 2: System layout
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 pipe
8: Control line
9: Injection pipe
Refrigerant piping is used to connect the indoor
unit to the outdoor unit.
2
1
4
3
Fig. 3: Cooling cycle schematic
1: Evaporator
2: Evaporator fan
3: Suction pipe connection
4: Injection pipe connection
REMKO MXT series
10

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.
Press the button next to the LED’s to activate auto-
matic mode.
The following settings apply for manual operation:
Pressing once: Automatic mode,
Pressing twice: Cooling test mode, active for 30
minutes
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. 4: 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!
11

Connection of the optional wired remote con-
trol KFB-3
The wired remote control, type KFB-3, can be con-
nected to the devices of the series MXT 264-354.
You need the connection cable that is part of the
delivery scope of the wired remote control for this.
The indoor units are ready to be plugged in for
connection.
The mating connector on the indoor unit can be
found below the electrical connection (Fig. 5). The
plug is colour-coded with the letters A to D.
Fig. 5: Connection KFB-3
4.2 Display on indoor unit
Display
2
1
4
3
5
Fig. 6: Display
1: Receiver infrared signal
2: Operating lamp (green)
3: Timer (yellow)
4: (Pre) heater function/defrosting (green)
5: Manual mode
REMKO MXT series
12

4.3 Manual air distribution
Setting the air distribution
The vertical air control blades can be manually
moved to the left and right (s. Fig. 7). An automatic
swing function is also available for horizontal air
distribution (s. Chapter “Buttons on the remote
control”).
Fig. 7: Setting the air distribution
Setting of the air outlet
The air outlet on the device can be set for
improved comfort. The units can blow out air on
the top and bottom sides. Proceed as follows to
change the settings:
1. Switch the unit off and open panel (s. Fig. 8)
2. The switch to select the blow-out direction
can be found below the LED's (s. Fig. 9)
3. If the switch is set to the symbol [A] (s. Fig. 9)
the indoor unit automatically determines the
blow-out side depending on the mode/situa-
tion (s. Table
Ä on page 14).
4. The unit only blows out the top side in the
operating mode “Dehumidify”.
5. Switch the selector switch to position [B] to
stop the unit blowing out from the bottom
side (s. Fig. 9). The unit only now blows out
the top side, depending on which operating
mode is set. Be aware that the unit must be
switched off before the change can take
effect.
Fig. 8: Opening front panel
1
AB
Fig. 9: Blow-off direction switch
1: Blow-off direction switch
A: Switch setting [A]
B: Switch setting [B]
13

Automatic selection of the blow-out side
Operating mode Cooling mode Heating mode
Situation
When the setpoint
is reached or after
1 operating hour.
When the unit is
started or when the
setpoint is not
reached.
The unit blows out
from the top and
bottom side when
the setpoint is
nearly reached to
optimally distribute
the warm air.
When the unit is
started or when the
room temperature
is low.
Blow-out direction
The unit only blows
out from the top to
avoid direct contact
between persons
and air flow.
The unit blows out from the top and
bottom to reach the corresponding set-
point as quickly as possible.
The unit only blows
out from the top to
avoid direct contact
between persons
and air flow.
REMKO MXT series
14

4.4 Keys on the remote control
10
8
11
12
2
1
6
3
7
5
9
4
13
14
Fig. 10: Keys on the remote control
1
“On/Off” key
Press this key to switch the air conditioning unit on
and off.
2
“Arrow up” temperature key
Increases the setpoint in 1 °C steps up to a tem-
perature of max. 30 °C.
3
“SET” key
Makes it possible to switch between different oper-
ating functions as follows:
“Follow me” function ( )
- Network configuration ( )
- “Follow me” function ( )
The selected function flashes in the display, con-
firm with the “OK” key.
4
“Swing” key
Starts and stops the horizontal fin movement.
Press and hold the key for 2 seconds to start the
vertical fin movement (available depending on the
unit model).
5
“Fan speed” key
Allows switching between the different fan speeds
in the following order:
Automatic  Low  Medium  High
Note: To activate the silence function (available
depending on the appliance model) of the appli-
ance, press and hold the key for 2 seconds.
6
“Turbo” key
Activating the turbo function ensures that the set-
point is reached as quickly as possible.
7
“Mode” key
This key allows switching between the different
operating modes in the following order:
Automatic  Cooling  Dehumidifying  Heating
 Recirculation
8
“Sleep” key
Activates/deactivates the energy saving function of
the unit (e.g. overnight).
9
“OK” key
Required to confirm various functions of the IR
remote control.
10
“Timer” key
Activates/deactivates the time-delayed start of the
unit or the unit switch-off.
11
“Arrow down” temperature key
Decreases the setpoint in 1 °C steps down to a
temperature of min. 17 °C.
12
“Fresh” key
Activates/deactivates the REMKO BioClean func-
tion (ionisation).
15

13
“Clean” key
Activates/deactivates the self-cleaning function of
the unit (available depending on the unit model).
14
“LED” key
Enables switching on/off the unit lighting and the
signal tones (depending on the unit).
Indicators on the LCD
1 3
25
6
7
4
8
9
10
11
12
13
14
Fig. 11: Indicators on the LCD
1
BioClean function active (available depending
on the unit type).
2
Sleep function active.
3
Follow-me function active.
4
Network configuration active.
5
Battery low (flashing).
6
Signal transmission
Lights up when a signal is sent from the IR remote
control to the air conditioning unit.
7
Time-delayed switch-on active.
8
Time-delayed switch-off active.
9
Silent mode active.
10
Fan speed
Displays the set fan speed as follows:
Low:
Medium:
High:
Automatic:
11
Mode selection
Shows the current operating mode.
12
Eco function
Lights up when the Eco function is active (available
depending on the unit).
13
Key lock
Symbol appears when the key lock is activated.
14
Temperature/Timer/Fan speed
Shows the current temperature setpoint in the
basic view. When using the additional function
“Timer”, the corresponding time values are shown.
REMKO MXT series
16

Temperature setting
The temperature setting can be made within a
range of 17-30 °C. The setpoint is adjusted in 1 °C
steps.
Automatic mode
In automatic mode, the unit automatically selects
the operating mode based on the set temperature
setpoint.
1. Press the “Mode” key to activate the “Auto”
function.
2. Set the desired temperature using the “Λ ”
and “V” keys.
3. The unit can be switched on by pressing the
“ON/OFF” key.
The fan speed cannot be set in automatic
mode!
Cooling mode
1. Press the “Mode” key and activate the “Cool”
function.
2. Set the desired temperature using the “Λ ”
and “V” keys.
3. Press the “FAN” key to select the fan speed.
The following are available: Automatic, Low,
Medium and High
4. The unit can be switched on by pressing the
“ON/OFF” key.
Fig. 12: Cooling mode
17

Timer function
With the “Timer” function, the unit can switch on
with a switch-on delay or switch off with a switch-
off delay.
Time-delayed switch-on
1. Press the “Timer” key to enter the “Time ON”
setting
2. Use the arrow keys to select the desired
number of hours after which the air condi-
tioning unit is to switch on
3. Point the remote control towards the air con-
ditioning unit and wait 1 sec. The timer is
now active (symbol in the display of the
remote control)
2
1
3
Fig. 13: Time-delayed switch-on
Time-delayed switch-off
1. Press the “Timer” key to enter the “Time
OFF” setting
2. Use the arrow keys to select the desired
number of hours after which the air condi-
tioning unit is to switch off
3. Point the remote control towards the air con-
ditioning unit and wait 1 sec. The timer is
now active (symbol in the display of the
remote control)
2
1
3
Fig. 14: Time-delayed switch-off
REMKO MXT series
18

Combining time-delayed switching on and off
13.00 14.00 15.00 15.30 16.00 17.00 18.00
a
b
c
2
13
Fig. 15: Combining time-delayed switching on and off
1: Timer starts
2: Unit switches on
3: Unit switches off
a: current (13:00)
b: 2.5 hours later
c: 5 hours later
Example: If both timers are activated at 13:00, the unit switches on 2.5 hours later (at 15:30) and switches off
5 hours later (at 18:00).
“Swing” function
Press the “Swing” key
1. The horizontal air guide fin starts to rise and fall automatically. Pressing again stops the fin at the
desired position
2. On units with 3D swing function, pressing the “Swing” key for 2 seconds activates the vertical fin move-
ment
12
Fig. 16: “Swing” function
19

Deactivate lighting and signal tones
1. Press the “LED” key to switch the unit lighting
on and off.
2. Press and hold the “LED” key for longer than
5 seconds, the ACTUAL temperature
appears in the unit display (not available for
all unit types)
2
1
Fig. 17: Deactivate lighting and signal tones
Activating Silent function
Depending on the unit type, the Silent function
(low-noise unit operation) can be activated. To do
this, the “FAN” key must be pressed and held for 2
seconds. The unit now operates in a particularly
quiet mode. It must be taken into account that the
unit cannot call up the full cooling or heating
capacity.
The silent mode can be deactivated again by
pressing the “ON/OFF”, “Mode”, “Sleep”, “Turbo” or
“Clean”.
Fig. 18: Silent function
Eco function
Press the “Eco” key (not available on all models) to
activate the energy-saving function of the unit.
Note: Function only available in cooling mode!
Fig. 19: COS Eco function
Function description:
Pressing this key in cooling mode automatically
sets the temperature setpoint to 24 °C. When the
room temperature is <24 °C, the fan goes into
energy-saving mode. If the room temperature is
>24 °C, the fan speed remains in the “Automatic”
operating mode.
Frost protection function
The air conditioning unit operates at high fan
speed with a fixed setpoint of 8 °C (only available
in heating mode).
To activate this function, heating mode must be
activated and the setpoint must be set to 17°C.
Pressing the “Arrow down” key twice within one
second activates the FP function.
The function can be deactivated again by pressing
the “On/Off”, “Sleep”, “Mode”, “Fan” keys and the
temperature setting.
Fig. 20: Frost protection function
Activating key lock
Hold the “Clean” and “Turbo” keys simultaneously
for 5 seconds to activate the key lock.
To deactivate the key lock, both keys must be
pressed again for 2 seconds.
Fig. 21: Activating key lock
“Shortcut” key
Pressing this key (not available on all unit models)
while the unit is in operation will reset all settings
(including operating mode, setpoint, fan speed and
sleep function) to the last used settings.
Fig. 22: “Shortcut” key
REMKO MXT series
20