REMKO RVT 261DC User manual

Edition GB – T10
REMKO RVT
RVT 261DC, RVT 351DC, RVT 521DC
Inverter wall - room air conditioner in split design
Operation · Technology · Spare parts

Contents
This operating manual is a translation of the German original.
These operating instructions should be read carefully
prior to commissioning / operation of the equipment!
These instructions are part of the equipment and must always
be kept in the vicinity of the installation or on the equipment
Subject to modifications; No liability accepted for errors or misprints!
Safety notes 4
Environmental protection and recycling 4
Warranty 4
Transport and packaging 5
Description of the equipment 5
Operation 6-12
Shutdown 13
Care and maintenance 13-14
Troubleshooting and customer service 15-16
Installation instructions for qualified personnel 16-19
Installation 19-21
Tightness check 21
Condensation connection 22
Electrical connection 22-23
Electrical connection diagram 23
Electrical circuit diagram 24-25
Before start up 26
Add refrigerant 26
Commissioning 26-27
Unit dimensions 28
Product illustration 29-30
Spare parts list 29-30
Technical data 31
Made by REMKO
3

Safety notes
Disposal of packaging
All products are packed for
transport in environmentally
friendly materials. Make a valuable
contribution to reducing waste
and sustaining raw materials. Only
dispose of packaging at approved
collection points.
Disposal of
old equipment
Our production facility is subject
to continuous quality control.
Only high-grade materials are
processed, the majority of which
are recyclable. Help protect the
environment by only disposing
of old equipment in accordance
with local regulations and in an
environmentally safe manner, e.g.
through authorised disposal and
recycling specialists or at collection
points.
Warranty
Prerequisite for any warranty
claims is that the purchaser or
his client has completely filled
out the "warranty registration
card"included with any unit within
the relevant time period of sale and
initial operation and returned the
completed card to REMKO GmbH
& Co. KG.
The warranty conditions are listed
in the "General business and
delivery conditions. The contractual
parties can also agree additional
terms beyond the scope of the
above. For this reason please
contact your direct contracting
partner first.
Environmental
protection
and recycling
Carefully read this manual before
starting the unit for the first time.
It contains useful tips, information
as well as hazard warnings to
prevent injury or material damage
. Non-observance of this
manual may endanger persons,
the environment as well as the
equipment itself and will void any
claims for liability.
■ Store this manual as well as
the refrigerant datasheet in the
vicinity of the unit.
■ The unit should only be set
up and installed by qualified
personnel.
■ The setup, connection and
operation of the unit and
its components must be in
accordance with the operating
conditions stipulated in this
manual and comply with all
applicable local regulations.
■ Units designed for mobile use
should be safely set up on a
suitable floor and in a vertical
position. Units designed for
stationary use should only be
operated in their permanently
installed state.
■ It is prohibited to make
modifications or changes to
equipment or components
supplied by REMKO as this may
cause malfunctions.
■ Equipment and components
should not be operated in areas
where there is a heightened
damage risk. Observe the
minimum clearances.
■ The electrical supply should
be adapted to fulfil the
requirements of the unit.
■ The operational safety of
equipment and components is
only assured providing they are
used as intended and in a fully
assembled state. Safety devices
should not be modified or
bypassed.
■ Do not operate equipment
or components with obvious
defects or signs of damage.
■ All housing parts and openings,
e.g. air inlets and outlets, must
not be blocked by foreign items,
fluids or gases.
■ The equipment and components
must be kept a safe distance
from inflammable, explosive,
combustible, aggressive and
dirty areas or atmospheres.
■ Persons coming into contact
with equipment parts may suffer
burns or injury.
■ Installation, repair and
maintenance work should only
be carried out by authorised
specialists. Inspection and
cleaning can be performed
by the operator providing the
equipment is not under voltage.
■ Take appropriate hazard
prevention measures when
performing installation, repair or
maintenance work or cleaning
the equipment.
■ The equipment or components
should not be exposed to any
mechanical stresses, extreme
levels of humidity or direct
exposure to sunlight.
REMKO RVT...DC
4

The equipment is shipped in sturdy
transport packaging. Immediately
check the equipment on delivery
and make a note of any damage
or missing parts on the delivery
note. Inform the forwarding agent
and contractual partner. Warranty
claims at a later date will not be
accepted.
The RVT 261-521DC room air
conditioning units have a REMKO
RVT...AT outdoor component as
well as an indoor unit RVT...IT.
The outdoor component serves to
output the heat extracted by the
indoor unit from the room being
cooled. In heating operation, the
heat absorbed by the outdoor
component can be discharged
through the indoor unit into
the room being heated. In both
operating modes, the performance
of the compressor precisely adjusts
itself to the demand, thereby
regulating the target temperature
with minimal temperature
variations. This "inverter-
technology" saves energy as
compared to a conventional split-
system and also reduces noise
emissions to a particularly low
level.
The outdoor component can be
installed outside or in indoor areas,
providing certain requirements are
met. The indoor unit is designed
for installation high up on interior
walls. It is operated via an infrared
remote control.
The outdoor component consists
of a refrigerant circuit with
compressor, fin liquefier, liquefier
fan, reverse flow valve and flow
regulator. The outdoor component
is controlled via the regulation of
the indoor unit.
The indoor unit consists of a fin
vaporiser, vaporiser fan, regulation
system and condensation pan.
Floor consoles, wall consoles,
refrigerant pipes and condensation
pumps are available as accessories.
Description of the
equipment
Transport and
packaging
The connection between the indoor unit and the outdoor component is
made with refrigerant pipes.
Schematic of refrigerant circuit in indoor unit - cooling
Vaporiser fan
Connection to suction
pipe
Connection to injection pipe
Vaporiser
Schematic of exterior refrigerant circuit
M
M
Liquefier fan Reverse flow valve
Liquefier Filter dryer Capillary tube flow regulator
Connection valve
Injection pipe
Connection valve
Suction pipe
Compressor
Connection
Manometer
Outdoor component
System layout
Stop valve
Indoor unit
Liquefier fan
Outdoor area
Injection pipe
Suction pipe
Control cable
Mains cable
Condensation pipe
Indoor area
Condensation pipe
5

Operation
Infrared remote control
The infrared remote control sends
the programmed settings over
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.
First insert the supplied batteries
(2 x type AAA) into the remote
control. To do so, pull off the flap
of the battery compartment and
insert the batteries according to
their polarization (see marks).
The indoor unit is easy to operate using an infrared remote control. This is supplied as standard. The indoor unit
beeps to acknowledge the correct transmission of data. If it is not possible to program
the indoor unit using the remote control, it can also be manually operated.
Problems are shown in code
(see chapter Troubleshooting
and Customer service).
CAUTION
Immediately replace flat batter-
ies 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 long periods.
NOTE
Display on indoor unit
The display lights up according to the settings.
Manual operation
The indoor unit can also be started
manually. After the air inlet screen
has been opened, the inner
recessed button can be pressed and
automatic mode can be activated.
In manual operation, the following
settings apply:
Cooling mode: 24°C,
Fan speed AUTO
Heating mode: 26°C,
Fan speed AUTO
Press the button on the infra-red
remote control to interrupt manual
operation.
max. 6 m
Maximum distance
Display on indoor unit
Display
Defrosting / heating Compressor speed
Automatic mode
Timer
activated/deactivated
Display for setpoint
and gauge
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!
TIP
REMKO RVT...DC
6

"FAN" button
Press this button to set the
required fan speed.
4 settings are available:
automatic, high, medium and
low fan speed.
"SLEEP/TURBO" Button
Pressing this button will
automatically increase or
decrease the target temperature
by 1 °C within an hour in
cooling and heating mode
respectively.
With the TURBO function, the
maximum fan speed can be
activated.
"SWING" Button
This button directly activates
the oscillating function of the
fins for better air distribution in
the room.
"AIR DIRECTION" Button
With this button, the desired fin
position can be set. There are
5 positions and an oscillating
function available.
"TIMER-ON" Button
This button serves to program
the automatic activation time
for the device within the next
24 hours.
"TIMER-OFF" Button
This button serves to program
the automatic switch-off time
for the device within the next
24 hours.
Buttons on the remote control
"ON/OFF" Button
Press this button to start the
unit.
"MODE" button
Press this button to select the
operating mode. The indoor unit
has 5 modes:
1. Automatic mode
In this mode, the unit works in
cooling or in heating mode.
2. Cooling mode
In this mode, the warm room
air is cooled to the desired
temperature.
3. Dehumidifying mode
In this mode the room is mainly
dehumidified, the adjusted
temperature is retained.
4. Heating mode
In this mode, the warm air in
the room is warmed up to the
desired temperature.
5. Circulation mode
In this mode, the air in the room
is recirculated.
Temperature selection is not
possible.
Button "▲"
With this button, the desired
temperature can be increased
up to 30 °C.
Button "▼"
With this button, the desired
temperature can be reduced
down to 17 °C.
Buttons on the remote control
7

A symbol is shown on the display to indicate that the settings are being
transferred.
By pressing the ON / OFF button, you can activate or deactivate your
unit. The programmed settings and adjustment values before the unit
was turned off will appear on the display.
ON/OFF Button
Hr.
ON TIMER
Hr.
Off TIMER
Turbo
SET TEMP
ON/OFF ON/OFF
Hr.
ON TIM ER
Hr.
Off TI MER
Tur bo
SET TEMP
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
Use the MODE button to select between the individual operating modes.
A total of 5 modes are available:
1. Automatic automatic selection of cooling or heating operation
2. Cooling predominantly summer operating mode
3. Dehumidification Summer or winter operating mode
4. Heating predominantly winter operating mode
5. Air circulation only for circulation of air
MODE Button
MODE
Automatic Cooling Dehumidification Heating Air circulation
MODE MODE MODE MODE
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Turbo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
In automatic mode, the control system autonomously selects between
heating, cooling and circulating modes. The nominal temperature can
only be preselected in a different mode and is then applied to automatic
mode.
AUTOMATIC Mode
COOLING
or
HEATING
The nominal
temperature is
below the room
temperature
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Turbo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
Hr.
ON TIM ER
Hr.
Off TI MER
Tur bo
SET TEMP
▲
▼
OR
or
AIR CIRCULATION
The nominal
temperature is
above the room
temperature
The p/q buttons can be used to reduce and increase the desired nominal
temperature.
pq Buttons
pq
Hr.
ON TIM ER
Hr.
Off TI MER
Tur bo
SET TEMP
Hr.
ON TIMER
Hr.
Off TIMER
Turbo
SET TEMP
Hr.
ON TIM ER
Hr.
Off TI MER
Tur bo
SET TEMP
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
ON/OFF
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
Button functions
REMKO RVT...DC
8

> 6 Min.> 3 Min.
> 6 Min.
30 sec. 30 sec.
Nominal temperature
Nominal temperature
-2°C
Fan operation IT
Fan operation AT
Compressor operation AT
Actual
temperature Start cooling mode
Cooling mode
Stop cooling mode
Functional diagram
Operation
Stop
In cooling mode, the air in the room is cooled down to the set target
temperature. The desired room temperature is set with the ▲/▼buttons
in 1 °C increments. If the room temperature is 1 °C above the selected
nominal temperature, the indoor unit starts to cool the air in the room.
The inverter controller checks the difference between the adjusted
target temperature and the actual room temperature. If there is a large
difference, the cooling output is very high. If the difference is smaller,
a lower cooling output is produced. This serves to maintain the air
discharge temperature and the room temperature.
If the adjusted room temperature is lower than approx. 2 °C, then the
control system turns the cooling function off. To protect the compressor,
the regulation only turns the cooling on again after a waiting period of 3
minutes.
COOLING Mode
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Turbo
COOLING
OPERATION
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
▲
▼
OR
Hr.
ON TIM ER
Hr.
Off TI MER
Tur bo
SET TEMP
In dehumidification mode, the room temperature is set to 24 °C. Due
to the low temperature of the refrigerant, the dew point of the air on
the vaporiser is lower. The excess moisture in the air is condensed by
the vaporiser, the room is dehumidified. The fan speed should be set to
automatic in order to achieve a maximum level of dehumidification. In
automatic mode, the fan is intermittently switched on and off.
DEHUMIDIFICATION MODE
DE-
HUMIDIFICATION-
MODE
30 sec.
Nominal temperature
Nominal temperature
-2°C
Fan operation IT
Fan operation AT
Compressor operation AT
Actual
temperature Start
Dehumidifying mode
Dehumidifying mode
Stop
Dehumidifying mode
Functional diagram
Operation
Stop
Low fan speed
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Turbo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
▲
▼
OR
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
ON/OFF
MODE
Hr.
ON TIMER
Hr.
Off TIMER
Tur bo
SET TEMP
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
MODE
Hr.
ON TIMER
Hr.
Off TIMER
Tur bo
SET TEMP
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
9

HEATING-
MODE
Heating mode operational sequence
> 6 Min.> 3 Min.
> 6 Min.
30 sec. 30 sec.
Nominal temperature
+5 °C
Nominal temperature
+2 °C
Fan operation IT
Fan operation AT
Compressor operation AT
Actual
temperature Stop heating operation
Heating mode
Start heating mode
Functional diagram
Operation
Stop
Reverse flow valve
30 sec. 30 sec.
During the defrosting cycle, the indoor unit vaporiser fan and the
outdoor component liquefier fan are switched off.
After the cycle is concluded, the fans are switched to their previous
settings.
< 7 Min.
Defrost period
15 sec. 60 sec.
Fan operation IT
Fan operation AT
Compressor operation AT
Operation
Stop
Reverse flow valve
30 sec. 30 sec.
30 sec. 3 Min.
▲
▼
OR
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
Hr.
ON TIM ER
Hr.
Off TI MER
Tur bo
SET TEMP
MODE
Hr.
ON TIMER
Hr.
Off TIMER
Tur bo
SET TEMP
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
In the heating mode, you can heat the room in spring or fall. The desired
room temperature is set with the ▲/▼buttons in 1 °C increments. If
the room temperature is 1 °C below the selected target temperature,
the indoor unit starts to heat the air in the room. The inverter controller
checks the difference between the adjusted target temperature and the
actual room temperature.
In the event of a greater difference, a higher cooling performance is
created.
In the event of a smaller difference, a lower cooling performance is
created.
This serves to maintain the air discharge temperature and the room
temperature.
If the adjusted room temperature is still exceeded by approx. 2 °C,
then the control system turns the heating function off. To protect the
compressor, the regulation only turns the heater on again after a waiting
period of 3 minutes.
In heating mode, the indoor unit fan motor is switched on after a delay,
in order to prevent the discharge of cold air.
The fins on the outdoor component could crack at low external
temperatures.
Regular reversal of the cooling circuit results in a defrosting action. The
display shows "H1" during the defrosting period.
HEATING Mode
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Turbo
FAN
REMKO RVT...DC
10

The fan speed can be adjusted with this button. A selection can be made
between low, medium, high and automatic fan speed.
FAN Button
FAN
In ventilation mode, the air in the room is only circulated.
The room temperature cannot be changed in this mode.
The cooling or heating operation is not activated.
AIR CIRCULATION Mode
AIR CIRCULATION
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Turbo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Tur bo
MODE
Hr.
ON TIMER
Hr.
Off TIMER
Tur bo
SET TEMP
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
FAN
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Turbo
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
FAN
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
FAN
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
FAN
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
This button activates a programming function, which causes the target
temperature in cooling mode to increase after one hour by 1°C and after
two hours by 2 °C. In heating mode, the target temperature is decreased
after one hour by 1 °C and after 2 hours by 2 °C.
The display on the indoor unit goes out.
The TURBO function is used to activate the maximum fan speed.
SLEEP/
TURBO
SLEEP/TURBO Button
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Turbo
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
SLEEP/
TURBO
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
SLEEP/
TURBO
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
deactivated deactivated
The oscillating function of the air discharge fins can be adjusted with
this button. The air distribution in the room is improved with the swing
function. In order to adjust the aim of the air discharge fins to a particular
direction, the AIR DIRECTION button must be pressed briefly. In order to
activate the automatic swing function, the AIR DIRECTION button must
be pressed for longer than 2 seconds.
SWING and AIR DIRECTION Buttons
SWING SWING
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Turbo
Hr.
ON TIM ER
Hr.
Off TI MER
SET TEMP
Auto
Tur bo
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
deactivated
11

The activation and switch-off time can be programmed with this button.
The timer is activated/deactivated by means of pressing the timer on
and the timer off button. The timer symbol ON TIMER or OFF TIMER
appears. The desired activation or switch-off time for the display up to
9.5 (hours) in 30 minute intervals and from displayed 10 in 60-minute
intervals can be adjusted by means of pressing the Timer on or the Timer
off buttons.
When the programmed time has been reached, the device is
automatically turned on or off. If the indoor unit is automatically
switched on, then the mode, temperature and fan speed for the last
setting is reactivated.
The prior deletion of the on and off time can be achieved by pressing the
On/Off button. The timer display on the indoor unit goes out.
TIMER Button • TIMER-ON / OFF
TIMER ON button - activation delay
TIMER ON Activation-
delay
TIMER OFF button - switch-off delay
Switch-off
delay
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Turbo
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
TIMER
ON
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
TIMER
ON
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
TIMER OFF
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
TIMER
OFF
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
TIMER
OFF
Hr.
ON TIMER
Hr.
Off TIMER
SET TEMP
Auto
Tur bo
Manual air distribution
There are individually adjustable
fins for adjusting the horizontal air
distribution on the air discharge
side.
Moving interior parts, e.g. fans,
have the potential to cause
injury during operation! Only
make adjustments after swing
operation has been switched
off.
CAUTION
Shift lever left
Manual air distribution
Shift lever right
REMKO RVT...DC
12

Shutdown
Temporary shutdown
1. Allow the indoor unit to run for
2 to 3 hours in air circulation
mode or in cooling mode at the
maximum temperature setting
in order to remove any residual
moisture from the unit.
2. Shut down the unit using the
remote control.
3. Switch off the voltage supply to
the unit.
4. Cover the unit as far as possible
with plastic foil in order to
protect it from the influences of
weather.
Permanent
Shutdown
Ensure that equipment and
components are disposed of in
accordance with local regulations,
e.g. through authorised disposal
and recycling specialists or at
collection points.
Contact REMKO GmbH & Co. KG
or your contract partner for a list
of specialist companies near you.
Care and maintenance
Regular care and maintenance
serves to ensure trouble-free
operation and long service life of
the unit.
Care
■ Ensure the indoor unit and
outdoor component are
protected against dirt, mould
and other deposits.
■ Clean the equipment using
a damp cloth. Do not use any
caustic, abrasive or solvent-
based cleaning products. Do
not use a jet of water.
■ Clean the fins on the indoor
unit and outdoor component
prior to long shutdown periods.
Maintenance
■ It is recommended that you
take out a maintenance
contract with an annual service
from an appropriate specialist
firm.
This ensures the operational
reliability of your equipment!
TIP
Prior to performing any
work, ensure the equipment
is isolated from the voltage
supply and secured to prevent
accidental switch-on!
CAUTION
Type of task
Checks/Maintenance/Inspections
Commissioning Monthly Six-monthly Yearly
General • •
Measure voltage and current • •
Check compressor/fans are functioning
correctly • •
Check fan is functioning correctly • •
Dirt on liquefier/vaporiser • •
Check refrigerant fill quantity • •
Check condensation drain • •
Test insulation • •
Check moving parts • •
13

Cleaning the condensation
pump (optional equipment)
An optional integrated or separate
condensation pump may be
included on the indoor unit, which
pumps out any accumulated
condensation into higher
positioned drains.
Observe the care and maintenance
instructions given in the separate
operating instructions manual.
Cleaning the housing
of the indoor unit
1. Disconnect the supply voltage
to the equipment.
2. Open the intake guard of the
cover and fold it upwards.
3. Clean the guard using a soft,
damp cloth.
4. Switch the supply voltage back
on.
Air filter for indoor unit
Clean the air filter at intervals of
no more than 2 weeks. Reduce this
interval in case of heavily soiled air.
Cleaning the filter
of the indoor unit
1. Disconnect the supply voltage
to the equipment.
2. Open the front side of the
device by means of folding up
the guard and allowing it to
engage (figure 1).
3. Lift the filter up slightly and pull
it out from underneath.
4. Clean the filter with
a commercially available
vacuum cleaner. In order to do
so, turn the dirty side upward
(Fig. 2).
5. Any dirt can be cleaned off
using lukewarm water and mild
cleaning agents. In order to do
so, turn the dirty side upward
(Fig. 3).
6. If water is used, let the filter
dry out properly in air before
replacing it in the unit.
7. Carefully insert the filter. Make
sure it is seated correctly.
8. Close the front side in reverse
order as described above.
9. Switch the supply voltage back
on.
10. Switch the unit back on.
2 Clean with a vacuum cleaner 3
Cleaning with lukewarm water
1 Fold up the guard
REMKO RVT...DC
14

Troubleshooting and customer service
The equipment and components are manufactured using state-of-the-art production methods and tested several
times to verify their correct function. If malfunctions should occur, please check the functions as detailed in the
list below. Please inform your dealer if the unit is still not working correctly after all the functional checks have
been performed!
Fault Possible cause Checks Remedial measures
The unit does not start
or switches itself off
Power outage, undervoltage,
defective mains fuse / main circuit
breaker switched off
Are all other electrical installations
functioning correctly?
Check voltage, possible wait until
turned on again.
Damaged mains cable Are all other electrical installations
functioning correctly? Repair by a specialist
Waiting time after switch-on too
short
Have approx. 5 minutes
elapsed since the restart? Schedule longer waiting periods
Temperate outside operating
temperature range
Are the fans in the indoor unit
and outdoor component working
correctly?
Take into account the temperature
range for the indoor unit and
outdoor component
Overvoltages caused by thunder
storms Has there recently been lightning?
Switch off the mains protection
and switch it back on /
have it checked by a specialist
Fault in external condensation
pump
Did the pump shut down due to
a fault?
Check and if necessary clean the
pump
The unit does not respond
to the remote control
Transmission distance too far /
receiver affected by interference
Does the indoor unit beep when
pressing a button?
Reduce the distance to less than 6
m or change position
Defective remote control Is the unit running in manual mode? Replace the remote control
Receiver or transmitter unit exposed
to excessive solar radiation
Does it function correctly in the
shade?
Place the receiver&transmitter unit
in the shade
Electromagnetic fields are
interfering with transmission
Does it function when
switching off possible sources of
interference?
Signal is not transmitted
when interference sources are
operational
Button on remote control jammed
/ two buttons pressed at same
time
Does the “Send” symbol appear
on the display?
Release the button / only press
one button
Batteries in remote control are flat Have new batteries been inserted?
Is the display incomplete? Insert new batteries
The unit is running
but only provides
reduced cooling or heating
performance
Filter is unclean / air inlet / outlet
blocked by foreign items Have the filters been cleaned? Clean the filters
Windows and doors open.
Heating/cooling output increases
Have there been any
constructional / application-
related changes?
Close windows and doors / install
additional units
Neither cooling nor heating mode
has been set
Is the cooling/heating symbol
shown on the display?
Correct the settings for the unit
Fins on outdoor component
blocked by foreign items
Is the fan on the outdoor
component running and are the
fins unobstructed?
Check the fan or winter controller,
reduce the air resistance
Leaking refrigerant circuit Are there signs of frost on the fins
of the indoor unit? Repair by specialist
Condensation is leaking out
of the collection container
drainage pipe
Blocked / damaged
Is unrestricted condensation
discharge ensured?
Cleaning of drain pipe
and collector reservoir.
Faulty external condensation
pump or float
Is the condensation tray full and
the pump running?
Call out a specialist to replace the
pump
Condensation has not drained
away and has collected in the
condensation pipe
Is there a steady fall on the
condensation pipe? Check there is
no blockage in the pipe.
The condensation pipe must have a
fall. If necessary, clean the pipe
Condensation does not drain off
Are the condensation pipes
unblocked and is there a steady fall?
Are the condensation pump and
float switch functioning correctly?
The condensation pipe must have
a fall. If necessary, clean the pipe.
A faulty condensation pump and
float switch should be replaced.
Malfunction
15

Problem display by blinker code
Display Cause Required action
E1 Communication error between outdoor component and indoor unit Contact specialist firm
E3 Liquefier fan controller faulty Contact specialist firm
E5 Sensor vaporiser temperature faulty / short-circuited Contact specialist firm
E6 Sensor air circulation faulty / short-circuited or
sensor vaporiser faulty / short-circuited Contact specialist firm
H4 Operating limits of outdoor component or indoor unit exceeded Switch system off
P0 IGBT overvoltage protection Contact specialist firm
P1 Undervoltage protection Switch system voltage-free and switch on again
P2 Compressor overload protection Contact specialist firm
P4 Power board IPM shutdown system Contact specialist firm
Installation instructions for qualified personnel
Important points prior to
installation
■ Transport the unit in its original
packaging as close as possible
to the installation location to
avoid transport damage.
■ Check the contents of the
packaging for completeness
and check the unit for visible
transport damage. Report
any damage immediately to
your contracting party and the
shipping company.
■ Lift the unit at the corners
and not by the refrigerant or
condensation connections.
■ The refrigerant pipes (injection
and suction pipe), valves and
connections must be insulated
impervious to vapour diffusion.
If necessary, also insulate the
condensation pipe.
■ Select an installation location
which allows air to freely
flow through the inlet and
outlet. (See section "Minimum
clearances").
■ Do not install the unit in
the immediate vicinity of
devices with intensive thermal
radiation. Installation near
sources of thermal radiation
reduces the output of the unit.
■ Open the blocking valves of the
refrigerant pipes only after the
installation is complete.
■ Seal off open refrigerant pipes
with suitable caps or adhesive
strips to avoid infiltration of
moisture and never kink or
compress the refrigerant pipes.
■ Avoid unnecessary bends. This
minimises the pressure loss
in the refrigerant pipes and
ensures that the compressor
oil can flow back without
obstruction.
■ Make special preparations
regarding the oil return if
the outdoor component is
located above the indoor unit.
(See section "Oil return flow
measures").
■ Add refrigerant if the basic
length of the refrigerant pipe
exceeds 5 metres.
The quantity of additional
refrigerant is given in chapter
"Add refrigerant".
■ Only use the union nuts for the
refrigerant pipes included in
the delivery, and remove them
shortly before connecting the
refrigerant pipes.
■ Establish all electrical
connections in accordance with
the relevant DIN- and VDE
standards.
■ See electrical connection
diagram always properly
insert electrical cables into the
electrical terminals. Otherwise a
fire could result.
REMKO RVT...DC
16

Selection of the installation
location
Indoor unit
The indoor unit is designed for
horizontal wall installation above
doors. However, it can also be
used on the upper wall area (min.
1.75 m from upper edge of floor).
Outdoor component
The outdoor component is
designed for horizontal base
installation in outdoor areas. It
should be placed on level, flat and
firm ground. The unit should also
be secured to prevent toppling.
The outdoor component can be
set up outside as well as inside a
building. For external installation,
please observe the following notes
to protect the unit from weather
conditions.
Wall openings
■ A wall opening of at least 70
mm diameter and 10 mm slope
from the inside to the outside
must be made for each indoor
unit.
■ We recommend that the
inside of the hole is padded or
lined, e.g. using a PVC tube,
to prevent the pipes being
damaged.
■ After installation, the wall
opening should be closed off on
the building side with a suitable
sealant. Do not use materials
containing cement or lime!
Installation material
The indoor unit is fastened using a
wall bracket and 4 threaded screws
(provided by the customer).
The outdoor component is
attached with 4 screws and a wall
bracket to the wall or fixed by a
floor bracket to the ground.
Minimum clearance to snow
20 cm
Snow
Windbreak
Wind
Pipes and cables in wall breakthrough
Control cable
Condensation pipe
Injection pipe
Suction pipe
PVC tube
Rain
The unit should be at least 10 cm
off the ground when mounted on
the roof or ground. A floor bracket
is optionally available.
Sun
The liquefier on the outdoor
component radiates heat.
Exposure to direct sunlight will
further increase the temperature
of the fins and reduce the
heat output of the finned
heat exchanger. The outdoor
component should therefore be
installed as near as possible to
the north side of the building.
If necessary, take measures
to provide sufficient shade
(responsibility of customer). One
possible solution is to build a small
roof. These measures should not
affect the flow of warm outlet air.
Wind
If the unit is being installed in
windy areas, ensure that the
warm outlet air discharges in the
main wind direction. If this is not
the case it may be necessary to
install a windbreak (provided by
the customer). Ensure that the
windbreak does not adversely
affect the air intake to the unit.
Snow
The unit should be wall-mounted
in areas of heavy snowfall.
Installation should be at least
20 cm above the expected level
of snow to prevent snow from
entering the outdoor component.
An optional wall bracket is
available as an accessory.
17

200
120
1500
120
120
Installation inside buildings
■ Ensure there is adequate heat
dissipation when placing the
outdoor component in cellars,
attics, adjoining rooms or halls
(Fig 4).
■ Install an additional fan with
a rated flow comparative to
that of the outdoor component
being installed in the room.
This is used in conjunction with
ventilation ducts to compensate
any pressure losses (Figure 4)
■ Ensure a continuous and
unobstructed air flow from
outside, preferably using
sufficiently large air intakes
placed opposite each
other(Figure 4).
Minimum clearances
Observe the minimum clearances
to allow access for maintenance
and repair work and facilitate
optimum air distribution.
RVT 261DC AT RVT 351DC AT RVT 521DC AT
A 150 mm
B 700 mm
C 400 mm
D 150 mm
E 200 mm 400 mm
■ Comply with any regulations
and conditions affecting
the statics of the building.
If necessary, fit acoustic
installation.
Minimum clearances
E
C
B
A
D
Air intake
Air outlet
Warm air Cold
Fresh air
Light
well
Outdoor
component
Warm air
Light
well
Additional
fan
4 Installation inside buildings
Air intake
Air outlet
All values in mm
REMKO RVT...DC
18

Mounting points for wall bracket
RVT 261DC IT
RVT 351DC IT
RVT 521DC IT
All dimensions in mm
1000
50
298
65
65
50
750
250
65
65
45
815
270
65
65
45
Connection variations
1 Outlet on the wall, right
2 Outlet through the wall, right
3 Outlet through the wall, left
4 Outlet on the wall, left
12
34
Connection variations of
indoor unit
Unit installation
The indoor unit is attached by
means of a wall bracket, under
consideration of air discharge side
located in the lower part.
1. Mark the mounting points
on the statically permissible
building sections according to
the dimensions of the unit.
2. If necessary, remove the break
out opening on the housing.
3. Connect the refrigerant
pipes, electrical cables and
condensation pipe to the indoor
unit as described below.
4. Hang the indoor unit onto the
wall bracket by tilting it back
slightly and by pressing the
bottom part of the unit against
the bracket (Figure 5).
5. Check that the unit is level.
Wall bracket
for indoor unit
The wall bracket for the unit must
be attached with suitable screws
and anchors.
Installation
Installation should only be
performed by authorised
specialists.
NOTE
Oil return measures
If the outdoor component is
installed at a higher level than
the indoor unit, suitable oil return
measures must be taken. Usually
an oil pump bend is installed
for every 2.5 metres of height
difference.
5 Hooking in
Oil return measures
Outdoor
component
Oil pump bend
in suction pipe to
outdoor component
1 x every 2.5
metres of rising pipe
Radius:
min. 50 mm
max. 15 m
Indoor unit
19

The units are factory filled with
dry nitrogen to check for leaks.
The pressurised nitrogen is
released when loosening the
union nuts.
CAUTION
Connection of
refrigerant pipes
The on-site connection of the
refrigerant pipes is made at the
rear of the unit.
It may be necessary to fit a reducer
or flared adapter to the indoor
unit. These fittings are included
as standard with the indoor unit.
Once installed, the connections
should be made tight against
vapour diffusion.
The following instructions describe
the installation of the refrigerant
circuit and the assembly of the
indoor unit and the outdoor
component.
1. The required pipe diameters are
given in the table "Technical
data".
2. Remove the factory-fitted
protective caps and union
nuts on the connections.
These should be used during
installation.
3. Before flanging the refrigerant
pipes, ensure that the union nut
is fitted on the pipe.
4. Prepare the laid refrigerant
pipes as shown below
(Figure 6+7).
Only employ tools and
components suitable for
refrigeration applications.
NOTE
Flanging tool
7 Flanging the refrigerant pipe
Refrigerant pipe
Deburrer
6 Deburring the refrigerant pipe
8 Correct flange shape
Tighten 1. spanner
Counter
2. spanner
9 Tighten the fitting
Tightening
torque:
14“
15-20 Nm
38“
33-40 Nm
12“
50-60 Nm
58“
65-75 Nm
34“
95-105 Nm
5. Verify that the shape of the
flange is correct(Figure 8).
6. First connect and hand-tighten
the refrigerant connections
to ensure they are correctly
seated.
7. Now fully tighten the fittings
using 2 suitably sized open-
ended spanners. Use one
spanner to counter the force
when tightening the fitting
(Figure 9).
8. Use insulation hoses which are
designed for this temperature
range and diffusion tight.
9. Lay the refrigerant pipes from
the indoor unit to the outdoor
component. In doing so,
ensure that they are sufficiently
attached and take measures for
the oil return, if necessary!
10. Observe the permitted bending
radius for the refrigerant pipes
during installation. Never bend
a pipe twice in the same place.
Brittle pipes and potential
cracking are the consequences.
11. Use the wall or floor brackets
to fit the outdoor component
against structural parts
approved to support the static
load (refer to the installation
instructions for the brackets).
REMKO RVT...DC
20