Remko RVT 681 DC user guide manual

REMKO RVD...DC

RVD 351DC, RVD 521DC, RVD 681DC, RVD 1051DC

Inverter ceiling-mounted air conditioner in split design

Operation · Technology · Spare parts

Edition GB – W09

Contents

Safety notes

Environmental protection and recycling

Warranty

Intended use

Transport and packaging

Description of the equipment

Operation

Shutdown

Care and maintenance

Installation instructions for qualified personnel

Installation

Tightness check

Condensate drain

4

4

4

4

5

5

6-12

13

13-14

15-18

18-19

20

20

Before commissioning

Electrical connection

Electrical connection diagram

Electrical circuit diagram

Add refrigerant

Commissioning

Troubleshooting and customer service

Resistances of the temperature- and hot gas sensors

Unit dimensions

Exploded view

Spare parts list

Technical data and performance charts for heating

EC-Declaration of Conformity

21

21

22

23-26

27

27-28

29-41

42-44

45

46-47

46-47

48-49

50

Made by REMKO

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.
This operating manual is a translation of the German original.

Subject to modifications; No liability accepted for errors or misprints!

3

REMKO RVD...DC

Safety notes

Carefully read this manual before
putting commissioning the
equipment. It provides useful
tips and information as well as
hazard warnings to prevent injury
or material damage . Failure to
follow the directions in this manual
can result in endangerment to
persons, the environment and the
equipment itself and will void any
claims for liability.

■ Keep this manual and the

refrigerant datasheet near the
unit.

■ The unit may 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.

■ Mobile units must be set up

securely on suitable surfaces and
in an upright position. Stationary
units must be permanently
installed for operation.

■ Modification of equipment

and components supplied by
REMKO is not permitted and
can cause malfunctions.

■ Equipment and components

may not be operated in areas
where there is an increased
risk of damage. Observe the
minimum clearances.

■ The electrical voltage supply

is to be adapted to the
requirements of the equipment.

■ The operational safety of

equipment and components is
only assured if they are used as
intended and fully assembled.
Safety devices may 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
be free of foreign objects, fluids
or gases.

■ The equipment and components

must be kept an adequate
distance from flammable,
explosive, combustible,
aggressive and dirty areas or
atmospheres.

■ Touching equipment parts can

result in burns or injury.

■ Installation, repair and

maintenance work may only
be carried out by authorised
specialists. Visual inspections
and cleaning can be performed
by the operator as long as 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

are not to be exposed to any
mechanical stresses, extreme
levels of humidity or direct
sunlight.

Warranty

Prerequisite for any warranty claims
are that the purchaser or their
customer has completely filled out
the "warranty registration card"
and commissioning report included
with the unit at the time when the
equipment was purchased and first
put into operation and returned it
to REMKO GmbH & Co. KG.
The warranty conditions are
listed in the "General Business
and Delivery Conditions". Only
the contractual parties can strike
special agreements beyond these
conditions. For this reason please
first contact your direct contractual
partner.

Environmental
protection
and recycling

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 equipment
and components

Only recyclable materials are used
in the manufacture of the devices
and components,
Help protect the environment
by ensuring that the devices
or components (for example
batteries) are not disposed in
household waste, but only in
accordance with local regulations
and in an environmentally safe
manner, e.g. through authorised
disposal and recycling specialists or
at collection points.

Intended use

Depending on the model, the
equipment and the additional
fittings with which it is equipped
is only intended to be used as an
air-conditioner for the purpose of
cooling or heating the air in an
enclosed room.
Different or additional use shall not
be classed as intended use. The
manufacturer/supplier assumes no
liability for damages arising from an
unintended use of the equipment.
The user bears the sole risk in such
cases.
Using the equipment as intended
also includes working in accord­ance with the operating manual
and installation instructions and
complying with the maintenance
requirements.

4

M

M

RXT 351 DC

T2

T

3

T5

M

M

TE

PS H

T1

T2

T

3

T5

P

S

L

RXT 1051 DC

M

M

PS H

T1

T2

T

3

TE

T5

P

S

L

Transport and
Packaging

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.

Description of the
equipment

The RVD 351-1051DC room air
conditioning units have a REMKO
RVD...AT outdoor component as
well as an indoor unit RVD...IT.

The outdoor unit 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.SFlbIn 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" enables power saving over
conventional split systems and also
reduces noise emissions to a particu­larly low level.
The outdoor component is mounted
outdoors or under the observa­tion of certain requirements it may
be installed indoors. The outdoor
component consists of a refrigerant
circuit with compressor, fin liquefier,
liquefier fan, reverse flow valve and
flow regulator. The outdoor unit is
controlled via the regulation of the
indoor unit.

The indoor unit is designed for
indoor installation in suspended
ceilings with Euroraster dimensions.
The cassette is hidden behind the
suspended ceiling, only its cover is
visible. Operation is undertaken via
an infrared remote control unit. The
indoor unit consists of a fin vapor­iser, vaporiser fan, regulation system
and condensation pan.

Floor consoles, wall consoles, re­frigerant pipes and a winter control
program are available as accessories.

Schematic of refrigerant circuit series RVD 351-1051 DC

RVD 351 DC

RVD 521-681 DC

RVD 1051 DC

T2

M1

T2

M1

T2

M1

T3

M1 - Condenser fan
M2 - Compressor
M3 - Vaporiser fan IU
V1 - Reversing valve C/H
EEV - Elec. Expansion valve
PSH - High pressure switch OU

V1

T1

M2

T3

Filter

PSL

V1

M2

T3

PSL

V1

M2

Oil return

EEV

EEV

Filter

PSH

T1

Filter

PSH

T1

FilterFilter

PSL - Low pressure switch OU
T1 - Sensor hot gas OU
T2 - Sensor air intake OU
T3 - Sensor condenser OU
T4 - Sensor air intake IU
T5 - Sensor vaporiser IU

Indoor areaOutdoor area

M3

M3

M3

IU - Indoor unit
OU - Outdoor unit

System layout

Indoor area

Indoor unit

Condensate drain

Outdoor area

Outdoor unit

Control line

Power output

Injection pipe

suction pipe

Condensate line

Shut-off valve

Condenser fan

The connection between the indoor unit and the outdoor component is
made with refrigerant pipes.

T5

T4

T5

T4

T5

T4

5

REMKO RVD...DC

Operation

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.

Manual operation

The indoor units can be started
manually. Press the RESET button
on the receiver unit of the cover to
activate automatic mode. In manual
operation, the following settings
apply:

Cooling mode: 24 °C,
Fan speed AUTO
Heating mode: 26 °C,
Fan speed AUTO

Pressing any button on the infra­red remote control interrupts
manual operation

Display on indoor unit

The lit display LEDs indicate the settings.

LED “Operation” green = Operation screen
LED “Timer” yellow = Timer mode
LED “Pre/Def” red = Defroster mode
LED “Alarm” red = Malfunction screen

Display RVD 351-521 DC

Display on indoor unit

Unit for receiving signals
from the remote control

Operation-

screen

Timer­screen

Defrost

Display RVD 681-1051 DC

Display on indoor unit

Fan

Alarm display

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).

Operation-

screen

Maximum distance

max. 6 m

Timer­screen

Display

screen

Fan

Defrost

Alarm display

Infrared
receiver

! CAUTION

Problems are
shown in code
(see chapter Troubleshooting
and Customer service).

NOTE

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 long periods.

6

Keys on the remote control

Keys on the remote control

"ON/OFF"key

Press this key to operate the
unit.

"MODE" key

Press this key to select the
operating mode.
The indoor unit has 4 modes:

1. Automatic mode
In this mode, the unit works in
cooling or in heating mode.

2. Cooling mode
In this mode, the warm air in
the room is cooled down to the
desired temperature.

3. Dehumidification mode
In this mode the room is mainly
dehumidified and the adjusted
temperature is maintained.

4. Heating mode
In this mode, the warm air in
the room is warmed to the
desired temperature.

5. Air circulation mode
In this mode, the air in the
room is circulated with no
change in temperature.

"FAN SPEED" key

Press this key to set the

desired fan speed. 4 speeds
are available: Automatic, high,
medium and low fan speed.

Key "SLEEP"

Pressing this key

will automatically increase or
decrease the target temperature
by 1 °C every hour in cooling
and heating mode respectively.

Key „SWING HORIZONTAL“

This key directly activates the

oscillating function of the fins
for better air distribution in the
room.

"TIMER ON" key

This key serves to program the

automatic shut-off time in 0.5
h intervals within the following
24 hours.

"TIMER OFF" key

This key serves to program the

automatic shut-off time in 0.5
h intervals within the following
24 hours.

"RESET" key

This key resets the remote

control to its factory default
configuration.

"TURBO"key

The TURBO function activates

the maximum fan speed and
the compressor.

"▼ " key

With this key, the desired

temperature can be decreased
to 17°C.

"▲ " key

With this key, the desired

temperature
can be increased up to 30°C.

"Follow me" function key

With this key, the sensing of
the room temperature is moved
from the interior unit to the
remote control.
The temperature measured
on the remote control is then
transmitted to the interior unit
in certain intervals.

"Lock" key

This key can be used to lock

the keys on the remote control.
This allows unintentional
adjustment to be prevented.

7

REMKO RVD...DC

Remote control display

Indicator arrows will be displayed according to the settings.

Display on indoor unit

Automatic operation

Cooling mode

Dehumidifying mode

Heating mode

Fan speed

Temperature display

Key functions

A symbol is shown on the display to indicate that the settings are being transferred.

Remote control on/off

The remote control's on/off function is shown at the upper right of the
remote control by a "wind symbol".

RESET key

The remote control can be reset by pressing the RESET key (recessed key).

ON/OFF key

8

Your air-conditioner is activated and deactivated by pressing the ON /
OFF key. The programmed settings and adjustment values before the
unit was turned off will appear in the display.

ON/OFF ON/OFF

▲/▼ Keys

Using the key, the target temperature can be adjusted up or down by
1°C. The temperature range lies between 17°C and 30°C

MODE key

Cooling mode

▼

▼

Automatic mode

▲

▲

Use the MODE key to select between individual operating modes. A total
of 5 modes are available:

1. Automatic cooling or heating operation

2. Cooling primarily summer mode

3. Dehumidifying operating mode for summer or winter

4. Heating primarily winter mode

5. Circulation air circulation only

Automatic Cooling Dehumidifying Heating

MODEMODEMODE

Air circulation

AUTOMATIC MODE

In automatic mode, the controller autonomously selects between heating,
circulation or cooling mode based on the room temperature Tr and
the selected target value Ts. The target value can be adjusted between
17°C and 30°C by means of the ▲/▼ keys. The fan speed is selected
automatically.

MODE

AUTOMATIC

Operational sequence:
If Tr is less than 1K as Ts, then operating mode "Heating" is selected.
If Tr is greater than 2K as Ts, then operating mode "Cooling" is selected.
If Tr is between Ts -1K as Ts +2K, then operating mode "Circulation" is selected.

If after the compressor is shut down and not required for more than 15 mins. within an operating mode, then,
in the event that the room temperature deviates, the corresponding mode heating, cooling or circulation
will be selected again.

9

REMKO RVD...DC

Cooling MODE

Dehumidification MODE

In cooling mode, the air in the room is cooled down to the adjusted
nominal temperature. The desired room temperature is set with the ▲/▼
keys in 1 °C increments. If the room temperature is 0.5 °C above the
selected nominal temperature, then the interior unit starts to cool down
the air in the room. If the temperature falls to approx. 1 °C below the set
room temperature, the controller will switch off the cooling function. To
protect the compressor, the controller only turns cooling on again after a
waiting period of 3 minutes.

MODE

It is recommended that the target temperature be set to 24°C in
dehumidifying mode. Due to the low temperature of the refrigerant, the
dew point of the air at the condenser is undercut. The excess moisture in
the air is condensed by the vaporiser, the room is dehumidified.

COOLING
OPERATION

HEATING Mode

MODE

In the heating mode, you can heat the room in spring or fall. The selected
room temperature is set using the ▲/▼ keys 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. If the set room temperature
is exceeded by approx. 1 °C, the controller will switch off the heater
function. To protect the compressor, the controller will wait 3 minutes
before switching on the heating mode again.

MODE

DEHUMIDIFICATION
MODE

HEATING
OPERATION

10

FAN SPEED Key

The fan speed can be adjusted with this key. A selection can be made
between low, medium, high and automatic fan speed.

SWING HORIZONTAL key

Automatic

FAN

Speed

High Medium

FAN

Speed

FAN

Speed

Low

FAN

Speed

The oscillating function of the air fins can be adjusted with this key. This
makes it possible to switch directly between a preset position and the
oscillating function. The air distribution in the room is improved with the
swing function.

Pressing the button for longer than 2s causes the oscillating function to
activate. To set your desired position, the button must be pressed for
another 2s.

The “Swing Vertical” button has not been assigned a function.

11

REMKO RVD...DC

SLEEP key

TIMER Key

A programming function is activated using this key, which increases the
target temperature in cooling mode by 1°C after one hour and by 2°C
after 2 hours. In heating mode, the target temperature is decreased
by 1 °C after one hour by 2 °C after 2 hours. The unit switches off
automatically after 8 hours.

The activation and switch-off time can be programmed with this key.
The timer is activated and the time display is switched off by pressing
the Timer on or Timer off key. The timer display on the indoor unit
illuminates. The desired activation or deactivation time is set by pressing
the Timer On or Timer Off keys. When the programmed time has been
reached, the device automatically switches on or off. If the indoor unit
is automatically switched on, the mode, temperature and fan speed for
the last setting are activated. Deleting the preset on and off time early is
carried out by pressing the ON/OFF key. The timer display on the interior
unit turns off.

TIMER ON Key

TIMER OFF Key

Timer On

Timer Off

Timer On

Timer Off

3 sec.

3 sec.

12

Shutdown

Care and maintenance

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.

Regular care and maintenance
serves to ensure trouble-free op­eration and long service life of the
unit.

! CAUTION

Prior to performing any work,
ensure the equipment is iso­lated from the voltage supply
and secured to prevent acci­dental switch-on!

NOTE

The statutory regulations
require an annual sealing test
for the refrigerant circuit in
relation to the refrigerant
filling level. The inspection
and documentation is to be
carried out by corresponding
specialist engineers.

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 solvent­based 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.

■

Systems which operate year­round (e.g. in server rooms),
the maintenance intervals must
be reduced accordingly.

TIP

This ensures the operational
reliability of your
equipment!

Contact REMKO GmbH & Co. KG
or your contract partner for a list
of specialist companies near you.

Type of task

Checks/Maintenance/Inspections

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

Sealing test for refrigerant circuit

1) see note

Commissioning

Monthly

Six-monthly

• •

• •

• •

• •

• •

• •

• •

• •

• •

• •

Yearly

1)

13

REMKO RVD...DC

Cleaning the cover
of the indoor unit

1. Disconnect the supply voltage
to the equipment.

2. Open and fold down the air
inlet guard on the cover. The
filter is held in place by the flaps
screwed in at the side of the
guard (Fig. 1).

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.

5. Any dirt can be cleaned off us­ing lukewarm water and mild
cleaning agents.
To do so, turn the dirty side
downward (Fig. 3).

6. When using water, allow
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 cover as described
above but in reverse order.

9. Switch the supply voltage back
on.

10.

Switch the unit back on.

Cleaning the
condensation pump

The indoor unit includes a built-in
condensation pump,
for pumping the condensation to a
drain at a higher level.

1 Guard on cover

2 Clean with a vacuum cleaner

3

Cleaning with lukewarm water

Cleaning the filter

1. Disconnect the supply voltage
to the equipment.

2. Open and fold down the air
inlet guard on the cover. The
filter is held in place by the flaps
screwed in at the side of the
guard (Fig. 1).

3. Tilt the filter and lift it out.

4. Clean the filter using a normal
vacuum cleaner (Fig. 2).
Turn the dirty side until it faces
up.

The pump is more or less main­tenance free. The condensation
pipes should be checked for dirt
at regular intervals. Clean them as
required.

If an external pump is also used,
observe the maintenance and care
instructions given in the separate
operating manual.

14

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.

■

Use four supports and the as­sociated hooks to attach the
ceiling cassette.

■

Use the insulated condensation
hose in the scope of delivery as
a junction piece to the continu­ing condensate drain. Secure
the condensate drain with the
supplied clamps.

4

Fixing materials for RVD 261-681 DC

Insulation

Suspension

Adapter piece

Clamps

15

REMKO RVD...DC

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!

Pipes and cables in wall breakthrough

Control line

PVC tube

Suction pipe

Condensation line

Injection pipe

Installation material

Selection of the installation
location

Interior 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).

Exterior unit

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.

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.

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.

Windbreak

Wind

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.

16

Sun

The liquefier on the outdoor unit
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 unit 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.

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.

Minimum clearance to snow

■

Ensure a continuous and unob­structed air flow from outside,
preferably using sufficiently
large air intakes placed opposite
each other
(Figure 5).

5 Installation inside buildings

Warm air

Additional
fan

■

Comply with any regulations
and conditions affecting the
statics of the building. If neces­sary, fit acoustic installation.

Cold
Fresh air

Snow

20 cm

Installation inside buildings

■

Ensure there is adequate heat
dissipation when placing the
outdoor component in cellars,
attics, adjoining rooms or halls
(Fig 5).

■

Install an additional fan with a
rated flow comparative to that
of the outdoor unit being in­stalled in the room. This is used
in conjunction with ventilation
ducts to compensate any pres­sure losses

(Figure 5).

Light
well

Warm air

Exterior unit

Light

well

Minimum clearances

Observe the minimum clearances to allow access for maintenance and
repair work and facilitate optimum air distribution.

Minimum clearances

1000

1000

Air intake

1000

D

1000

A

500

E

Air outlet

B

All values in mm

C

RVD 351DC AT RVD 521DC AT RVD 681DC AT RVD 1051DC AT

A 150 mm

B 900 mm

C 500 mm

D 150 mm

E 500 mm

17

REMKO RVD...DC

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.

Oil return measures

Exterior unit

Oil pump bend

in suction pipe to

outdoor unit

1 x every 5

metres of rising

pipe

Radius:
50 mm

max. 5/10 m

Interior unit

lection tray.

3. Fit the ceiling cassette approx.
2 cm higher than the surface of
the ceiling. (see Figure 8)

4. Make sure that clearance A,
(Fig. 8) as specified in the table
below, is provided between the
underside of the suspended
unit and the underside of the
fastening surface.

5. Connect the refrigerant pipes,
electrical cables and condensa­tion line to the indoor unit as
described below.

6. Check that the unit is level.

7. The final task is to tighten the
counternuts and attach the
cover.

6 Mounting the unit

400

All dimensions in mm

Dimensions in
mm

RVD 351-

521DC

Distance A 35 mm

Distance B 25 mm

Mounting
the unit

Dimensions in
mm

620 x 400 mm

RVD 681-

1051DC

Distance A 35 mm

610

Installation

NOTE

Installation should only be
performed by authorised spe­cialists.

Unit installation

The indoor unit is mounted face
down on four threaded rods. Take
into account the ceiling grid and
any other installations.

1. Use the dimensions of the ceil­ing cassette (Fig. 6) to mark the
fixing points for the threaded
rods on structural parts ap­proved to support the static
load above the suspended ceil­ing.

7 Hooking in the unit

8 Fastening the unit

Structural component

A

B

Distance B 25 mm

Mounting
the unit

Structural component

620 x 400 mm

Structural component

2. Fit the indoor unit onto the
threaded rods and use the
lower nuts to level the unit
(Fig. 7).This ensures that the
condensate drains into the col-

18

abaut 2 cm

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.

CAUTION

!

The units are factory filled with
dry nitrogen to check for leaks.
The pressurised nitrogen is
released when loosening the
union nuts.

The following instructions describe
the installation of the refriger­ant circuit and the assembly of
the indoor unit and the outdoor
component.

5. Verify that the shape of the
flange is correct(Figure 11).

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 open­ended spanners. Use one span­ner to counter the force when
tightening the fitting (Figure

12).

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

9 Deburring the refrigerant pipe

Refrigerant pipe

that they are sufficiently at-

tached 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.

NOTE

Only employ tools and com­ponents suitable for refrigera­tion applications.

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).

10 Flanging the refrigerant pipe

Flanging tool

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

(Fig. 9+10).

Deburrer

11 Correct flange shape

12 Tighten the fitting

Tighten 1. spanner

Counter

2. spanner

Tightening
torque:

“

15-20 Nm

“

33-40 Nm

“

50-60 Nm

“

65-75 Nm

“

95-105 Nm

19

REMKO RVD...DC

Tightness check

Once all the connections have
been established, the pressure
gauge station is attached as fol­lows to the Schrader valve (if
fitted):
red = small valve
= injection pressure
blue = large valve
= suction pressure

Once connected, perform a tight­ness test using dried nitrogen.

The tightness test involves spray­ing a leak detection spray onto
the connections. If bubbles are
visible, the connections have not
been properly made. Re-tighten
the connection or prepare a new
flange.

If the tightness test is success­fully completed, depressurise
the refrigerant pipes and start a
vacuum pump with an absolute
final partial pressure of min. 10
mbar to remove the air in the pipe.
Any humidity present in the pipes
is also removed.

!

CAUTION

A vacuum of min. 20 mbar
must be created!

Condensate drain

If the temperature falls below the
dew point, condensation will form
on the cooling fins during cooling
mode.
A collection tray together with
a condensation pump and float
switch are fitted as standard below
the cooling fins. Should the float
switch trip a protective shutdown
due to inadequate removal of
the condensation, the pump will
switch on immediately and run on
for approx. three minutes.

■

The condensation pipe should
have a fall of min. 2 %. This is
the responsibility of the cus­tomer. If necessary, fit vapour
diffusion proof insulation.

■

If the level of the condensation
pipe on the unit is above that of
the outlet, route the pipe verti­cally upwards and then with a
fall to the drain.

■ The delivery rate varies accord-

ing to device type (see right)

■

The condensation line from the
unit should run freely into the
drainage pipe. If the condensa­tion runs directly into a sewer
pipe, fit a trap to prevent any
unpleasant odours.

Condensation connection - Wrong!

Riser pipe too far away

No fall

Condensation pipe too large/small

Cannot freely drain away

Condensation connection - Correct!

min. 2% fall

12-20 mm

500 mm
750 mm

The time required to generate the
vacuum is dependent on the pipe­work volume of the indoor unit
and the length of the refrigerant
pipes. This always takes at least
60 minutes.
Once any foreign gases and
humidity have been completely
extracted from the system, the
valves on the pressure gauge sta­tion are closed and the valves on
the outdoor unit are opened as
described in the chapter on "Com­missioning".

20

■

When operating the unit at
outdoor temperatures below
4°C, ensure the condensation
pipe is laid to protect it against
frost. If necessary, fit supple­mentary pipe heating.

■

Once the pipe has been laid,
check the condensation drains
off and permanently seal it.

■

Local regulations or laws of
environmental protection, eg
Water Resources Act (WHG)
are observed.

max. 100 mm

! CAUTION

The maximum flow rate of the
condensate pump is 500/750
mm head. External influences,
such as for example can air-side
pressure, pollution, or wear it
come to power reduction. To
ensure a safe functional opera­tion, we recommend a maxi­mum lifting height of 500 mm,
not to exceed!

Before
Commissioning

After the tightness check has been
successfully completed,
connect the vacuum pump via the
pressure gauge station to the valve
connections on the outdoor unit
(see chapter "Tightness check")
and create a vacuum.

Perform the following checks prior
to commissioning the unit for the
first time and after any interven­tions affecting the refrigerant
circuit. Record the results in the
commissioning report:

■

Check of all refrigerant
pipes and valves with
leak detection spray or soapy
water for leaks and for inad­vertent mix up of suction and
injection pipe, with the unit at a
standstill.

■

Check of all refrigerant
pipes and insulation for dam­age.

■

Check of all electrical
connections between
indoor unit and outdoor unit
for correct polarity.

■

Check that all fastenings,
mountings etc.
are firm and at the correct level.

! CAUTION

All electrical installation work
should be performed by spe­cialist contractors. Isolate the
voltage supply when connect­ing the electrical terminals.

■

We recommend that custom­ers install a main/repair switch
in the vicinity of the outdoor
component.

■

The terminal blocks for making
the connections are located at
the rear of the unit. When the
unit is installed, measurements
can be made from the front by
removing the cover.

■

If an optional condensation
pump is used in conjunction
with the unit, it may be neces­sary to install an additional relay
with a higher contact rating
after the switch-off contact
on the pump to switch off the
compressor.

■

Control cables should be
screened if laid in areas exposed
to strong magnetic fields.

■

Details concerning the electrical
protection
of the system are given in the
section on technical data.

nent. See electrical connection
diagram.

4. Re-assemble the unit.

13

Connecting the indoor unit

Cover

Terminal
block
Control line

Connecting the outdoor unit

Proceed as follows to connect the
cable:

1. Remove the cover from the
unit.

2. Remove the side panel next to
the terminals.

Electrical connection

A protected mains supply cable
and control cable should be con­nected to the outdoor component
RVD 351-1051DC and indoor unit
respectively.

NOTE

We recommend realising the
control lines with shielded
cable.

Connecting the indoor unit

Make the connection as follows:

1. Open the air intake grill.

2. Unfasten the cover on the
right side (RVD 351-521DC) or
below the panel (RVD 681­1051DC (Fig. 13).

3. Connect the unit to the control
cable on the outdoor compo-

3. Select the cable cross-section
according to the relevant stand­ards.

4. Feed both cables through the
edge protection rings on the
fixed connection panel.

5. Terminate the cables as shown
on the electrical connection
diagram.

6. Support the cable in the strain
relief and re-assemble the unit.

21

REMKO RVD...DC

Electrical connection diagrams

RVD 351 DC

Indoor unit

L1

Phase cond.

N

Neutral cond.

S

Data cond.

Earth conductor

Outdoor unit

L1

N

S

Power output

Phase cond.

Neutral cond.

Earth conductor

230 V~,
50 Hz,
L1 / N / PE

Note:
The A-E plug to connect a cable remote control!
Terminals X, Y, E at RVT 521 DC are not used!
The attached fixed resistor is not needed

RVD 521DC

Indoor unit

L

Phase conductor

N

Neutral conductor

P

Control conductor

Q

Control conductor

E

Control conductor

PE PE

Earth conductor

Outdoor unit

L

Phase conductor

Neutral conductor

N

P

Q

E

Earth conductor

Note:
The A-E plug to connect a cable remote control!
Terminals X, Y, E at RVT 521-1051DC are not used!
The attached fixed resistor is not needed

Power output

L

N

PE

230 V~,
50 Hz,
L / N / PE

Note:
For the correct address selection, all 4 DIP switches (red) to ON

DIP-Switch

Note:
For the correct address selection, all 4 DIP switches (red) to
OFF

RVD 681DC

Indoor unit

L

Phase conductor

N

Neutral conductor

Control conductor

P

Q

Control conductor

E

Control conductor

PE PE

Outdoor unit

Earth conductor

L

Neutral conductor

N

P

Q

E

Note:
The A-E plug to connect a cable remote control!
Terminals X, Y, E at RVT 1051DC are not used!
The attached fixed resistor is not needed

Power output

Phase conductor

Earth conductor

PE

RVD 1051DC

Indoor unit

Neutral cond.

Earth conductor

P

Control cond.

Q

Control cond.

E

Control cond.

Outdoor unit

L1L1 L1

NN N

Pe PePe

P

Q

E

Power output

Phase cond.

Phase cond.

Phase cond.

Neutral cond.

Earth conductor

L2L2

L3L3

L

N

400 V/3~,
50 Hz,
L / N / PE

230 V/1~,
50 Hz,
L / N / PE

DIP-Switch

Note:
For the correct address selection, all 4 DIP switches (red) to
OFF

DIP-Switch

Note:
The A-E plug to connect a cable remote control!
Terminals X, Y, E at RVT 521-1051DC are not used!
The attached fixed resistor is not needed

22

Note:
For the correct address selection, all 2 DIP switches (red) to
OFF

A

U

V

W

Y/G

U

V

W

RY3

4

CN6

CN7

CN5

CN4

CN2 8

CN26

C

N

1

0

N

-

B

B

C

N

3

C

N

2

C

N

1

CN15

CN14

CN16

N-A

Zum Innengerät

Y/G

WHITE

REACTOR2 R6025C
REACTOR1 R1310K

Kurbelwannenheizung

Heizung

5

CN31

CN33

CN34

CN32

B

L

A

C

K

Y/G

T3

Sensor Umgebung

T5

Sensor Verflüssiger Sensor Heißgas

Sensor Öl

Kompressor

Ventilatormotor

Umkehrventil

Blau

Schwarz

Rot

Schwarz

Rot

Rot

Hauptplatine

Grau

Optional

Orange

Gelb

Rot

Orange

Gelb

Gelb

Orange

Rot

Blau

Stromüberwachung

Gelb

Blau

Braun

Electrical circuit diagram

RVD 351 DC Indoor unit

M

RVD 351 DC Outdoor unit

blue

red

black

Compressor

Probe condenser

Sensor environment

Main board

blue

Power management

yellow

yellow

red

red

Hot gas sensor

Sensor oil

black

yellow

yellow

blue

brown

red

Fan motor

Heating

Crankcase heating

To indoor unit

red

gray

Reversing valve

23

Blau

Blau

Blau

Blau

Blau

Blau

Blau

Kompressor

Rot

Schwarz

Gelb

Gelb

Schwarz

Rot

Weiß

Rot

RotRot

Schwarz

Gelb

Grau

Filter

Schwarz

Rot

Rot

Schwarz

Schwarz

Yellow/Green

Yellow/Green

Yellow/Green

Schwarz

Rot

Schwarz

Braun

Braun

Weiß

Weiß
Weiß

Weiß

Rot

Rot

Rot

Rot

Rot

Orange

Rot

Schwarz

UWV

U

V

W

P

N

IPM

10PIN

W V

U

L202

IPM

EEW

T5

CN4

CN12

CN5CN5

CN16

CN11

CN1

CN2

Trans. Trans.

CN20

CN27

CN28

CN9

Hochdruckschalter

Niedrigdruckschalter

R2503

P-3

P-4

P-5

P-6

P-2

3

CN3

R1815B

R1325C

CN14

CN15

CN13

CN12

CN7

CN5

CN6

CN4

CN8

CN10

CN9

Blau

Ventilator

CN1 CN2

L

N

L

N

P-1

L

H

Sensor Heißgas

Sensor Außentemperatur

Sensor Austritt
Verflüssiger

Elektronisches
Expansionsventil

Leistungsplatine

zum Innengerät

Steuerleiter

Hauptplatine

Steckverbinder

Steckverbinder

GM

P1

Lila

Weiß

Netzzuleitung Innenteil

Rot

Weiß

CN4

CN11 CN5 CN7 CN9

Weiß

C5

Weiß Schwarz

Rot

CN3

CN2

T1 T2

T2 T1

CN14 CN10 CN15

(E)

Y

X

Schwarz

Grau

Gelb

Schwarz

Blau

Weiß

(E)

P

C

YEX

E

F M

CN12

CN1

zum Außengerät
Steuerleiter

zum CCN
Steuerleiter

DM

Display

Y/G

c

Blau

Y/G

CN5

REMKO RVD...DC

RVD 521 DC Indoor unit

white

purple

Power output indoor unit

RVD 521 DC Outdoor unit

red

black

24

red

blue

Compressor

blue red black

red

white

white

red

Connector

blue

red

blue

orange

red

white

red

Electronic
expansion valve

red

blue
white
white

Main board

white

Probe outlet
condenser

black

Power board

brown

brown

white

To CCN

Control

conductor

blue

black

blue

black

To outdoor unit

black

white

yellow

Red

blue

Fan

black

yellow

gray

Control

conductor

High pressure switch

Low pressure switch

yellow

Red

yellow

To the indoor unit

Control conductor

black

red

blue

blue

black

red

white

Hot gas sensor

Sensor outside
temperature

black

gray

black

red

Connector

RVD 681 DC Indoor unit

GM

P1

Lila

Weiß

Netzzuleitung Innenteil

Rot

Weiß

CN4

CN11 CN5 CN7 CN9

Weiß

C5

Weiß Schwarz

Rot

CN3

CN2

T1 T2

T2 T1

CN14 CN10 CN15

(E)

Y

X

Schwarz

Grau

Gelb

Schwarz

Blau

Weiß

(E)

P

Q

YEX

E

F M

CN12

CN1

DM

Display

Y/G

c

Blau

Y/G

CN5

Blau

Blau

Blau

Blau

Blau

Blau

Blau

Kompressor

Rot

Schwarz

Gelb

Gelb

Schwarz

Rot

Weiß

Rot

RotRot

Schwarz

Gelb

Grau

Filter

Schwarz

Rot

Rot

Schwarz

Schwarz

Yellow/Green

Yellow/Green

Yellow/Green

Schwarz

Rot

Schwarz

Braun

Braun

Weiß

Weiß
Weiß

Weiß

Rot

Rot

Rot

Rot

Rot

Orange

Rot

Schwarz

UWV

U

V

W

P

N

IPM

10PIN

W V

U

L202

IPM

EEW

T5

CN4

CN12

CN5CN5

CN16

CN11

CN1

CN2

Trans. Trans.

CN20

CN27

CN28

CN9

Hochdruckschalter

Niedrigdruckschalter

R2503

P-3

P-4

P-5

P-6

P-2

3

CN3

R1815B

R1325C

CN14

CN15

CN13

CN12

CN7

CN5

CN6

CN4

CN8

CN10

CN9

Blau

Ventilator

CN1 CN2

L

N

L

N

P-1

L

H

Sensor Heißgas

Sensor Außentemperatur

Sensor Austritt
Verflüssiger

Elektronisches
Expansionsventil

Leistungsplatine

zum Innengerät

Steuerleiter

Hauptplatine

Steckverbinder

Steckverbinder

white

purple

red blue

Power output indoor unit

RVD 681 DC Outdoor unit

Compressor

blue red black

red

Connector

red

black

red

blue

red

white

white

Electronic
expansion valve

blue

red

orange

red

white

red

blue
white
white

Probe outlet
condenser

Main board

Power board

brown

brown

white

black

blue

blue

black

white

To CCN

Control

conductor

black

white

yellow

High pressure switch

Red

Low pressure switch

yellow

Red

yellow

To the indoor unit

Control conductor

black

red

blue

blue

black

red

Fan

white

blue

black

yellow

To outdoor unit

Control

conductor

Hot gas sensor

Sensor outside
temperature

black

gray

black

red

black

gray

Connector

25

POWER_RY

HEAT

4-WAY

FAN_H

FAN_L

TRANS IN

T4

N

TRANS IN

CT1

L1

L2

L3

L1

L2

L3

CN16

T5T3

1

5

3

4

2

RED

CN42

CN48

CN46
CN47

CN44
CN45

CN43

CN20-CN22

GND

A1

A2

2T1

4T2

6T3

1L1

3L2

5L3

21

22

2

REMKO RVD...DC

RVD 1051 DC Indoor unit

DM

Weiß

white

Lila

purple

red blue

Rot

Y/G

Netzzuleitung Innenteil

Power output indoor unit

Blau

CN1

CN3

CN2

CN12

c

P1

Weiß

white

GM

Display

CN14 CN10 CN15

CN4

CN11 CN5 CN7 CN9

red

Rot

C5

Y/G

F M

Weiß

white

CN5

T2 T1

black

white

Weiß Schwarz

T1 T2

YEX

E

Weiß

Blau

white

blue

X

Y

To CCN

Control

conductor

Schwarz

black

(E)

To outdoor unit

Gelb

yellow

P

Q

Control

conductor

Grau

gray

(E)

Schwarz

black

RVD 1051 DC Outdoor unit

26

Add refrigerant

The equipment contains a basic
quantity of refrigerant. Beyond
these conditions, for refrigerant
pipe lengths of more than 5 meters
per circuit, an additional amount of
refrigerant must be added, accord­ing to the following chart:

! CAUTION

Note that the employed refrig­erant is always filled in liquid
form!

NOTE

Check the overheating to
determine the refrigerant fill
quantity

CAUTION

!

Wear protective clothing when
handling refrigerant.

RVD

RVD

RVD

681

DC

30

g/m

RVD

1051

DC

30

g/m

Up to and
incl. 5m

From 5m to
max.
Length

351

DC

25

g/m

521

DC

0 g/m

25

g/m

Commissioning

NOTE

Commissioning should only be
performed and documented by
specially trained personnel.

The system can be commissioned
once all the components have
been connected and tested. A
functional check should be per­formed to verify its correct func­tion and identify any unusual
operational behaviour prior to
handing it over to the operator.

NOTE

Check that the stop valves and
valve caps are tight after carrying
out any work on the refrigerant
circuit. If necessary, use appropri­ate sealant products.

Function test and
test run

Check the following points:

■

Leak tightness of refrigerant
pipes.

■

Compressor and fan running
smoothly.

■

In cooling mode, cold air should
be output by the indoor unit,
and warm air should be output
by the outdoor component.

■

Functional test of the indoor
unit and all program
sequences.

■

Check of the surface tempera­ture of the suction pipe and
determination of vaporiser
overheating. To measure the
temperature, hold the ther­mometer to the suction pipe
and subtract the boiling point
temperature reading on the
pressure gauge from the meas­ured temperature.

■

Record the measured tem­peratures in the commissioning
report.

Functional test for cooling
and heating modes

1. Remove the caps
from the valves.

2. Begin the commissioning
process by briefly opening the
blocking valves of the external
section until the manometer

displays a pressure of approx. 2
bar.

3. Use leak detection spray or suit­able devices to check that all
the connections are tight.

4. If no leaks are found, fully open
the stop valves by turning them
anti-clockwise using a spanner.
If leaks are found, repair the
faulty connection. It is impera­tive that the vacuum creation
and drying steps are repeated.

5. Switch off the main circuit
breaker or remove the fuse
(provided by the customer).

6 Press the test knob on the

outdoor unit and wait until
a frequency of min. 50 Hz is
established.

7. Use the remote control to
switch on the unit and select
the cooling mode, maximum
fan speed and lowest target
temperature.

8. Check the overheating, out­door, indoor, outlet and vapori­sation temperatures and record
the measured values in the
commissioning report. Check
the correct function and set­tings of all regulation, control
and safety devices.

9. Check the indoor unit control
system using the functions
described in the chapter "Oper­ation". Timer, temperature set­ting, fan speeds and switching
to ventilation or dehumidifying
mode.

10.Check the correct function
of the condensation pipe by
pouring distilled water into the
condensation tray.
A bottle with a spout is recom­mended for pouring the water
into the condensation tray.

11.

Switch the indoor unit to heat­ing mode.

27

REMKO RVD...DC

12.

Check all the previously
described safety devices and
functions during the test run.

13.

Enter the measured data in
the commissioning report.
in the commissioning report
and familiarize the operator
with the system.

14.

Remove the pressure gauge.
Check that seals have been
fitted in the sealing caps.

NOTE

Press the TEST knob on the
outdoor unit board. This
serves to set the inverter to
max. refrigerating capacity.

15. Reinstall all parts which were
removed.

Functional test and test run

During operation of the plant
operating parameters can be called
up on the outdoor unit display.
(only RVD 521-1051DC)
The following parameters are dis­played successively:

RVD 521-1051 DC

- Frequency of the compressor

- Operating mode

- Level fan

- Current cooling/heating perforance

- Temperature sensor liquefier

- Temperature sensor hot gas

- Temperature sensor air inlet

- Power consumption outdoor unit

- Degree of opening for electronic
Expansion valve only RVD 521 DC

- error code

Proceed as follows to call up the
operating parameters:

1. Remove the cover from the
outdoor unit.

2. Switch all indoor units on and
select cooling mode and the
highest fan speed.

Display

The display on the outdoor unit
PCB can call up the operating pa­rameters of the plant in the above
order. In order to do so, press the
check button located next to the
display on the outdoor unit board.

Check button

Frequency gauge

Display Frequency (Hz)

30 30

-- Stand by

60 60

Operating mode

Display

0 Off
2 Cooling mode
3 Heating mode
4 Forced cooling

Mode Outdoor unit

Operating mode fan

Display Mode fan

0 Off
1 Low rotational speed
2 High rotational speed

Cooling output - heating output
Outdoor unit / Indoor unit

Display Cooling output

1 2.0-2.5 kW
2 2.5-3.0 kW
3 3.0-3.8 kW
4 3.8-5.0 kW
5 5.0-5.5 kW
6 5.5-6.1 kW

Temperature sensor liquefier

Display Temperature

10 35-40 °C
11 40-45 °C
12 45-50 °C
13 50-55 °C
14 55-60 °C
15 60-65 °C
16 65-70 °C

Temperature sensor hot gas

Display Temperature

10 35-40 °C
11 40-45 °C
12 45-50 °C
13 50-55 °C
14 55-60 °C
15 60-65 °C
16 65-70 °C

Temperature sensor air inlet

Display Temperature

15 -7.5 °C
20 -5.0 °C
25 -2.5 °C
30 0° C
35 2.5 °C
40 5.0 °C
45 7.5 °C
50 10.0 °C
55 12.5 °C
60 15.0 °C
65 17.5 °C
70 20.0 °C
75 22.5 °C
80 25.0 °C
85 27.5 °C
90 30.0 °C
95 32.5 °C
99 34.5 °C

Power consumption outdoor unit

Display

44 6.0 A
46 6.2 A
54 7.4 A
55 7.6 A
58 7.8 A
62 8.0 A
66 8.6 A
67 8.8 A
68 9.0 A
70 9.2 A
72 9.5 A
76 10.0 A
78 10.2 A
80 10.4 A
82 10.6 A
84 11.0 A
88 11.6 A
92 12.0 A
94 12.2 A

Power consump-

tion

28

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!

Malfunction

Fault Possible cause Checks Remedial measures

The unit does not start
or switches itself off

The unit does not respond
to the remote control

The unit is running with
reduced or without
reduced cooling / heating
performance

Condensation discharge
on unit

Power outage, undervoltage,
defective mains fuse / main circuit
breaker switched off

Damaged mains cable

Waiting time after switch-on too
short

Temperature outside operating
range.

Overvoltages caused by thunder
storms

Fault in external condensation
pump

High-pressure / low-pressure
monitors have triggered

Transmission distance too far /
receiver affected by interference

Defective remote control

Receiver or transmitter unit ex­posed to excessive solar radiation

Electromagnetic fields are interfer­ing with transmission

Button in remote control jammed
/ two buttons pressed at same
time

Batteries in remote control are flat

Filter is unclean / air inlet / outlet
blocked by foreign items

Windows and doors open. Heat­ing/cooling output increases

Neither cooling nor heating mode
has been set

Fins on outdoor component
blocked by foreign items

Leaking refrigerant circuit

Outdoor component iced up

Drainage pipe on collection con­tainer clogged / damaged

Faulty external condensation
pump or float

Condensation has not drained
away and has collected in the
condensation line

Condensation does not drain off

Float is stuck or jammed due to
excessive dirt.

Are all other
electrical installations functioning
correctly?

Are all other
electrical installations functioning
correctly?

Have approx. 5 minutes
elapsed since the restart?

Are the fans in the indoor unit
and outdoor component working
correctly?

Has there recently been lightning?

Did the pump shut down due to
a fault?

Check refrigerant pressure and
look for leaks if necessary

Does the indoor unit beep when
pressing a button?

Is the unit running in manual
mode?

Does it function correctly in the
shade?

Does it function when switching off
possible sources of interference?

Does the “Send”
symbol appear on the display?

Have new batteries been inserted?
Is the display incomplete?

Have the filters been cleaned? Clean the filters

Have there been any construc­tional /
application-related
changes?

Does the cooling symbol appear
on the display?

Is the fan on the outdoor com­ponent running? Are the fins
unobstructed?

Are there signs of frost on the fins
of the indoor unit?

Check outdoor component. Has
the cassette sensor on the outdoor
component been correctly posi­tioned?

Can the condensation drain off
without any obstruction?

Is the collection tray full of water
and the pump not running?

Is there a steady fall on the con­densation pipe? Check there is no
blockage in the pipe.

Are the condensation lines un­blocked and is there a steady fall?
Are the condensation pump and
float switch functioning correctly?

Are the LEDs on the receiver unit
of the indoor unit flashing?

Check voltage
possible wait until turned on
again.

Repair by
a specialist

Schedule longer waiting
periods

Take into account the tempera­ture range for the indoor unit and
outdoor component

Switch off the mains breaker and
switch it back on. Have it checked
by a specialist

Check and if necessary clean the
pump

Rectify leakage and re-start

Reduce the distance to less than 6
m or change position

Replace the remote control

Place the receiver&transmitter unit
in the shade

Signal is not transmitted when in­terference sources are operational

Release the button / only press
one button

Insert new batteries

Close windows and doors / install
additional units

Correct the settings for the unit

Check the fan or winter controller,
reduce the air resistance

Repair by specialist

De-ice and fit the sensor at the
point where the most ice forms

Clean the drainage pipe and col­lection container

Call out a specialist to replace the
pump

Ensure there is a fall when laying
the condensation pipe and clean
the pipe.

The condensation line must have
a fall. If necessary, clean the pipe.
A faulty condensation pump and
float switch should be replaced.

Should be cleaned by specialist firm

29

REMKO RVD...DC

Problem display by blinker code

LED

Operation

flashes
rapidly

flashes

slowly

LED

Timer

flashes
rapidly

flashes

slowly

LED

Defrost

flashes
rapidly

flashes

slowly

LED

Alarm

flashes

slowly

flashes
rapidly

Display

outdoor

unit

E0 EEPROM error Check EEPROM

E2

E3

E4

E5 Overvoltage compressor Check compressor voltage

P0 Excessive temperature compressor Allow compressor to cool

P1 High pressure sensor has triggered Check refrigerant pressure

P2 Low pressure sensor has responded Check refrigerant pressure

P3

P4 Compressor discharge gas over 105°C

P5 Liquefier temperature over 65°C

P6

Communication error between PCBs
outdoor unit & indoor unit
Communication error between out­door unit main board & outdoor unit
inverter board
Outdoor temp sensor on outdoor com­ponent tripped

Compressor power consumption too
high

Voltage protection main board outdoor
unit
Sensor air circulation / sensor liquefier
tripped
Communication error between outdoor
unit & indoor unit

Mode malfunction

Sensor liquefier / outdoor temp faulty
or not correctly connected

Condensate pump float switch faulty

Cause Required action

Check electrical connection
leads

Check wiring

Check resistance and tem­perature on sensor

Check compressor power
consumption
Clean liquefier, check refrig­erant circuit
Clean liquefier, check refrig­erant circuit

Check voltage

Check resistance

Check electrical connection
leads

Switch system off

Read off error code on
outdoor unit
Check sensors
Check condensate pump
and float switch

30

Fault analysis

1. Operation light flashes at 5 Hz: fault on the
room temperature sensor

Is the resistance of the
vaporise sensor OK?
(white cable)
(Table 1 P92-94)?

Yes

Is the resistance of the
room sensor OK?
(Table 1 P92-94)?

Yes

Replace indoor unit
main board

No

No

Replace temperature
sensor

Replace temperature
sensor

Note:

The room temperature sensor and vaporiser sensor
are brought together in a single connector, CN9

3. Timer light flashes at 5 Hz: communication
error between indoor unit and outdoor component

2. Defrost light flashes at 5 Hz: fault on the
vaporiser sensor

Is the resistance of the
temperature sensor OK?
(black cable)
(Table 1 P92-94)?

Yes

Replace indoor unit
main board

No

Replace temperature
sensor

4. Alarm light flashes at 5 Hz: float switch /
condensation pump

Set the cooling mode
on the indoor unit and
run the system so a
few minutes.
If the error still exist?

Is there voltage in the
indoor unit?

Yes

Is the connecting cable
shielded, and is it
earthed?

Yes

Is the cable connecting
the indoor unit and
outdoor component
properly connected?

Yes

Is the cable connecting
the indoor unit and
outdoor component
damaged?

No

No

No

No

Yes

Establish the power
supply.

Use a shielded,
earthed cable

Connect the cable
properly.

Replace the cable.

Yes

Is the float switch
working properly?

Yes

Does the condensate
pump properly
appropriate?

Yes

Check the condensate
drain, whether it is
bent if necessary.
If the condensate drain
okay?

Yes

Replace the main board
for the indoor unit

No

No

No

Replace float switch.
Error still exists?

Condensate pump
exchange. Error still
exists?

Condensate drain
renew or repair

Replace the main board
for the indoor unit or
outdoor component

31

REMKO RVD...DC

5. Operation and Timer lights flash at 5 Hz:
EEPROM error

Is the EEPROM
fitted properly?

No

Fit EEPROM properly

Yes

Replace outdoor
component main board

6. Operation light flashes at 5 HZ and Alarm light is on: IPM safety shutdown

Check the power
supply to the circuit
board. Is it working
OK?

No

Yes

Are the connections from the circuit board to
the compressor OK?

Yes

Check the
windings of the
compressor

Correct
connections

No

Check the power
supply for the
outdoor component.
Is a voltage of 230
V present at the unit
power supply?

Yes

Check the unit's
electrical supply.
Is it properly
connected?

No

No

No

Correct the power
supply to the unit.
Is the unit working
properly again?

Connect the electrical
supply properly

Are the
windings of the
compressors
OK?

Yes

Replace
circuit board

No

No

Replace circuit board

Replace
compressor

Does the
unit run after
replacing the
compressor?

Are all the circuit
board's electrical
cables properly
connected?

Check the chokes on
the circuit board

Chokes have ∞
resistance?

Check the fuses on
the circuit board

Circuit board fuses

Yes

OK?

Yes

Yes

No

No

No

Yes

Connect all electrical
cables properly

Replace circuit board

Replace fuse or circuit
board

32

7. RVD 351 DC
Operation light flashes at 5 Hz and Timer light is on:
condenser temperature sensor

outdoor component overcurrent protection

9. Operation, Timer and Alarm lights flash at 5Hz:

RVD 521 DC
Alarm light flashes at 1 Hz: Fault Temperature sensor
condenser or outdoor unit is not working properly
(look at E4, P1 and P2)

Connection of sensor
line OK?

Yes

Resistance of the
sensor OK
(Table 1, P92-94)?

No

Replace temperature
sensor

No

Yes

Correct
sensor line

Replace outdoor
component main
board

8. Operation light flashes at 5 Hz, Timer and
Alarm lights are on: outdoor component
overvoltage protection

Is the input current
greater than 16A?

Yes

Check refrigerant pipes

Is the outdoor
temperature too high?

No

Is the function of the
fan on the outdoor
component OK?

Yes

Is the register of the
outdoor component
dirty?

No

Yes

Switch off unit

Ensure fan functions
properly

Clean the register

Yes

of the outdoor
component

Connection of sensor
line OK?

Yes

Is the voltage between
L and N of the outdoor
component 198 –
254V?

Yes

Replace main board

No

No

Connect the sensor
properly

Establish correct
power supply

No

Are the refrigerant
pipes blocked or bent?

No

Replace outdoor
component main board

Siphon off refrigerant,
replace pipe / remove

Yes

blocked, perform
pressure test, drawn
vacuum and refill

33

REMKO RVD...DC

10. Operation light flashes at 5 Hz and Defrost light is on: Hot gas temperature too high

Is the temperature of
the Klixon over 115°C?

No

Is the connection
between the Klixon and
circuit board OK?

Yes

Is the resistance value
for the Klixon correct
(Table 2, P95)?

Yes

Replace outdoor
component main board

Yes

No

No

Is there a
refrigerant leak?

Establish a proper
connection

Replace Klixon

Yes

Fix the leak and top up

34

RVD 521-1051DC outdoor unit fault analysis

Fault displays shown on the outdoor component

Fault code
DISPLAY

Fault description Required action

E0 EEPROM error see page 85 / point 1

E2 Communication error between indoor unit and outdoor component see page 85 / point 2

E3 Communication error on outdoor component main board see page 86 / point 3

E4 Fault on the outdoor temperature sensor see page 86 / point 4

E5 Compressor overvoltage protection see page 86 / point 5

P0 Compressor overload protection (Klixon) tripped

P1 High pressure fault (from RVD 521 and up) see page 87 / point 6

P2 Low pressure fault (from RVD 521 and up) see page 88 / point 7

P3 Compressor overcurrent protection tripped see page 89 / point 8

P4 Compressor overload protection (Klixon) see page 90 / point 9

P5 Condenser outlet sensor triggered see page 90 / point 10

P6 IPM power board safety shutdown see page 91 / point 11

2.

1. Fault code E0: EEPROM error

Fault code E2: communication error between indoor

unit and outdoor component

No

Establish the power
supply.

fitted properly?

No

Fit EEPROM properlyIs the EEPROM

Is there voltage in the
indoor unit?

Yes

Replace outdoor
component main board

Yes

Are the DIP switches
on the main board set
correctly?. See cover.

Yes

Is the cable connecting
the indoor unit and
outdoor component
properly connected?

Yes

Is the cable connecting
the indoor unit and
outdoor component
damaged?

No

Replace the main board
for the indoor unit or
outdoor component

No

No

Yes

Reset the DIP switch
and switch for 5 min
without current.

Connect the cable
properly.

Replace the cable.

35

REMKO RVD...DC

3. Fault code E3: communication error on main board
of the outdoor component

Does LED1 flash on the
outdoor component
main board?

No

Is the electrical
connection between
the power board and
CN4 on the main board
OK?

Yes

Disconnect the
electrical connection
between the power
board and CN4 on the
main board.
Is there a measurement
of 5V on power board
CN1 between the 3th
and 4th pins?

No

Is the connection between
the IPM module (positive
terminal) and CN12 on
the power board OK?

Yes

No

Yes

No

Replace
main board

Establish a proper
connection

Replace
main board

Establish a proper
connection

4. Fault code E4: fault on outside temperature
sensor T4 or condenser sensor T3

Is the condenser
sensor properly
connected?

Yes

Measure the resistance
of the sensor. (Table 1,
P92-94)
Resistance OK?

Yes

Is the outside
temperature sensor
properly connected?

Yes

Measure the resistance
of the sensor. (Table 1,
P92-94)
Resistance OK?

Yes

Replace
main board

No

No

No

No

Connect condenser
sensor properly

Replace
sensor

Connect the outside
temperature sensor
properly

Replace sensor

Yes

Is the connection between
the IPM module (negative
terminal) and CN13 on
the power board OK?

Yes

Is there a measurement
of 277-345V between
CN12 and CN13 on
the power board?

No

No

Yes

Establish a proper
connection

Replace power board

Replace
IPM module

5. Fault code E5: compressor overvoltage protection

Is the supply line
properly connected and
are there 172-265 V
between L1 and N?

Yes

Replace power board
Does the unit work
after the replacement?

No

No

Replace supply line

Replace
main board

36

6. Fault code P1: high pressure fault

Is the connecting cable
from the high pressure
switch to the main
board OK?

Yes

High pressure switch
may be defective

Bypass the high
pressure switch on the
circuit board. Does the
unit work now?

No

Check refrigerant
pipes

No

Yes

Correct
connection

Replace the high
pressure switch

Is the outdoor
temperature too high?

No

Yes

Switch off unit

Replace outdoor
component main board

Is the function of the
fan on the outdoor
component OK?

Yes

Is the register of the
outdoor component dirty?

No

Are the refrigerant
pipes blocked or bent?

No

Yes

Yes

Ensure fan functions
properly

Clean the register of the
outdoor component

Siphon off refrigerant,
replace pipe / remove
blocked, perform
pressure test, drawn
vacuum and refill

37

REMKO RVD...DC

7. Fault code P2: low pressure fault

Is the connecting cable
from the lower pressure
switch to the main
board OK?

Yes

Low pressure switch
may be defective

Bypass the low pressure
switch on the circuit
board. Does the unit
work now?

No

Check refrigerant
pipes

No

Yes

Correct
connection

Replace the high
pressure switch

Is the outdoor
temperature too low?

No

Yes

Switch off unit

Siphon off refrigerant,
replace pipe / remove
blocked, perform
pressure test, drawn
vacuum and refill

No

Replace outdoor com­ponent main board

The refrigerant pipes
may be leaking

Check the refrigerant
pressure with a
manometer. Is the
refrigerant pressure less
than 1.4 bar?

No

Refrigerant pipe may
be blocked

Yes

Check the refrigerant
pipes with leak
detection spray or an
electronic leak detector

38

8. Fault code P3: compressor overcurrent protection
has tripped

Is the input current
greater than 20A?

No

Check refrigerant pipes

Yes

Is the outdoor
temperature too high?

No

Is the function of the
fan on the outdoor
component OK?

Yes

Is the register of the
outdoor component
dirty?

No

Are the refrigerant
pipes blocked or bent?

No

Replace outdoor
component main board

No

Yes

Yes

Yes

Switch off unit

Ensure fan functions
properly

Clean the register of the
outdoor component

Siphon off refrigerant,
replace pipe / remove
blocked, perform
pressure test, drawn
vacuum and refill

39

REMKO RVD...DC

9. Fault code P4: hot gas temperature too high

Is the hot gas
temperature over 115°C?

No

Is the connection
between the sensor
and circuit board OK?

No

Is the resistance value
for the sensor correct
(Table 2, P95)?

Yes

Replace outdoor
component main board

Yes

No

No

Is there a
refrigerant leak?

Establish a proper
connection

Replace
hot gas sensor

10. Fault code P5: condenser outlet sensor triggered

Yes

Fix the leak and top up

Is the condenser outlet
temp. greater than
65°C?

No

Check the resistance
of the sensor. (Table 1,
P92-94)
Is the resistance OK?

Yes

Replace outdoor
component main board

No

Yes

Switch off unit

Replace
sensor

Clean condenser
register

Siphon off refrigerant,
replace pipe / remove
blocked, perform
pressure test, drawn
vacuum and refill

Yes

Yes

Yes

Is the outdoor
temperature too high?

No

Is the condenser
register dirty?

No

Are the refrigerant
pipes blocked or bent?

No

40

Replace outdoor
component main board

11. Fault code P6: IPM power board safety shutdown

Is the voltage range
between P and N of
the IPM module OK?

Yes

Is the connection
between the main board
and IPM module OK?

Yes

Is the connection to the
compressor OK?

Yes

Replace IPM module.
Is fault still present?

No

No

No

Is the input voltage
between P and N of
the IPM module 230V
/ the frequency 50 Hz?

Connect cables
properly
Is fault still present?

Establish a proper
connection

Establish a proper
connection

Replace single-phase
bridge circuit

No

No

Ensure the correct
supply voltage

Yes

Are all the electrical
cables properly
connected?

Yes

Yes

Is the single-phase
bridge OK?
Take a measurement
with a multimeter
between “+” and the
two AC contacts and
between “-” and the
two AC contacts. Is the
resistance for the two
measurements 0Ω?

Yes

No

Yes

Replace main board.
Is fault still present?

Yes

Replace compressor.
Is fault still present?

4-way valve

Temperature Resistance Measuring point

20 °C 1.5 kΩ Blue - Blue

Replace connecting
cables

Replace the defective
fuse

Note:

Heating mode 0V AC
Cooling mode 230V AC

No

Yes

Are the connecting
cables to the chokes
OK? Is the resistance of
the connecting cables
∞?

No

Check the fuses on the
power board. Are they
working OK?

Yes

Replace the
power board

41

REMKO RVD...DC

Resistances of the temperature sensors (Table 1)

Temp. Resistance kΩ

(°C) Rmax

-20 116.539 106.732 96.920

-19 110.231 100.552 91.451

-18 103.743 94.769 86.328

-17 97.673 89.353 81.525

-16 91.990 84.278 77.017

-15 86.669 79.521 72.788

-14 81.684 75.059 68.815

-13 77.013 70.873 65.083

-12 72.632 66.943 61.574

-11 68.523 63.252 58.274

-10 64.668 59.784 55.169

-9 61.048 56.524 52.246

-8 57.649 53.458 49.492

-7 54.456 50.575 46.899

-6 51.456 47.862 44.455

-5 48.636 45.308 42.150

-4 45.984 42.903 39.977

-3 43.490 40.638 37.927

-2 41.144 38.504 35.992

-1 38.935 36.492 34.165

0 36.857 34.596 32.440

1 34.898 32.807 30.810

2 33.055 31.120 29.271

3 31.317 29.528 27.815

4 29.681 28.026 26.440

5 28.138 26.608 25.140

6 26.682 25.268 23.909

7 25.310 24.003 22.745

8 24.016 22.808 21.644

9 22.794 21.678 20.601

10 21.641 20.610 19.614

11 20.553 19.601 18.680

12 19.525 18.646 17.794

13 18.554 17.743 16.955

14 17.636 16.888 16.160

15 16.769 16.079 15.406

16 15.949 15.313 14.691

17 15.174 14.588 14.014

18 14.442 13.902 13.372

19 13.748 13.251 12.762

20 13.093 12.635 12.183

21 12.471 12.050 11.634

R(t) Normal

Rmin

Temp. Resistance kΩ

(°C) Rmax

22 11.883 11.496 11.112

23 11.327 10.971 10.617

24 10.800 10.473 10.147

25 10.300 10.000 9.700

26 9.848 9.551 9.255

27 9.418 9.125 8.834

28 9.010 8.721 8.434

29 8.621 8.337 8.055

30 8.252 7.972 7.695

31 7.900 7.625 7.353

32 7.566 7.296 7.029

33 7.247 6.982 6.721

34 6.944 6.684 6.428

35 6.656 6.401 6.150

36 6.381 6.131 5.886

37 6.119 5.874 5.634

38 5.870 5.630 5.395

39 5.631 5.397 5.167

40 5.404 5.175 4.951

41 5.188 4.964 4.745

42 4.982 4.763 4.549

43 4.785 4.571 4.362

44 4.596 4.387 4.183

45 4.417 4.213 4.014

46 4.246 4.046 3.851

47 4.082 3.887 3.697

48 3.925 3.735 3.550

49 3.776 3.590 3.409

50 3.632 3.451 3.274

51 3.495 3.318 3.146

52 3.363 3.191 3.023

53 3.237 3.069 2.905

54 3.116 2.952 2.793

55 3.001 2.841 2.685

56 2.890 2.734 2.582

57 2.784 2.632 2.484

58 2.682 2.534 2.390

59 2.585 2.440 2.299

60 2.491 2.350 2.213

61 2.401 2.264 2.130

62 2.315 2.181 2.051

63 2.233 2.102 1.975

R(t) Normal

Rmin

42

Temp. Resistance kΩ

(°C) Rmax

64 2.154 2.026 1.903

65 2.077 1.953 1.833

66 2.004 1.883 1.766

67 1.934 1.816 1.702

68 1.867 1.752 1.641

69 1.802 1.690 1.582

70 1.740 1.631 1.525

71 1.680 1.574 1.471

72 1.622 1.519 1.419

73 1.567 1.466 1.369

74 1.514 1.416 1.321

75 1.463 1.367 1.275

76 1.414 1.321 1.230

77 1.367 1.276 1.188

78 1.321 1.233 1.147

79 1.277 1.191 1.108

80 1.235 1.151 1.070

81 1.195 1.113 1.034

82 1.156 1.076 0.999

83 1.118 1.041 0.966

84 1.082 1.007 0.934

85 1.047 0.974 0.903

86 1.014 0.942 0.874

87 0.982 0.912 0.845

88 0.951 0.883 0.818

89 0.921 0.855 0.791

90 0.892 0.828 0.766

91 0.864 0.802 0.742

92 0.838 0.777 0.719

93 0.812 0.753 0.696

94 0.787 0.730 0.675

95 0.763 0.708 0.654

96 0.740 0.686 0.634

97 0.718 0.666 0.615

98 0.697 0.646 0.597

99 0.677 0.627 0.579

100 0.657 0.609 0.562

101 0.638 0.591 0.546

102 0.620 0.574 0.530

103 0.602 0.558 0.515

104 0.585 0.542 0.501

105 0.569 0.527 0.485

R(t) Normal

Rmin

43

REMKO RVD...DC

Resistances of the hot gas sensors (Table 2)

°C kΩ °C kΩ °C kΩ °C kΩ

-20 542.7 22 62.73 64 11.79 106 3.113

-19 511.9 23 59.98 65 11.38 107 3.025

-18 483 24 57.37 66 10.99 108 2.941

-17 455.9 25 54.89 67 10.61 109 2.86

-16 430.5 26 52.53 68 10.25 110 2.781

-15 406.7 27 50.28 69 9.902 111 2.704

-14 384.3 28 48.14 70 9.569 112 2.63

-13 363.3 29 46.11 71 9.248 113 2.559

-12 343.6 30 44.17 72 8.94 114 2.489

-11 325.1 31 42.33 73 8.643 115 2.422

-10 307.7 32 40.57 74 8.358 116 2.357

-9 291.3 33 38.89 75 8.084 117 2.294

-8 275.9 34 37.3 76 7.82 118 2.233

-7 261.4 35 35.78 77 7.566 119 2.174

-6 247.8 36 34.32 78 7.321 120 2.117

-5 234.9 37 32.94 79 7.086 121 2.061

-4 222.8 38 31.62 80 6.859 122 2.007

-3 211.4 39 30.36 81 6.641 123 1.955

-2 200.7 40 29.15 82 6.43 124 1.905

-1 190.5 41 28 83 6.228 125 1.856

0 180.9 42 26.9 84 6.033 126 1.808

1 171.9 43 25.86 85 5.844 127 1.762

2 163.3 44 24.85 86 5.663 128 1.717

3 155.2 45 23.89 87 5.488 129 1.674

4 147.6 46 22.89 88 5.32 130 1.632

5 140.4 47 22.1 89 5.157

6 133.5 48 21.26 90 5

7 127.1 49 20.46 91 4.849

8 121 50 19.69 92 4.703

9 115.2 51 18.96 93 4.562

10 109.8 52 18.26 94 4.426

11 104.6 53 17.58 95 4.294 B(25/50)=3950K

12 99.69 54 16.94 96 4.167

13 95.05 55 16.32 97 4.045 R(90°C)=5KΩ±3%

14 90.66 56 15.73 98 3.927

15 86.49 57 15.16 99 3.812

16 82.54 58 14.62 100 3.702

17 78.79 59 14.09 101 3.595

18 75.24 60 13.59 102 3.492

19 71.86 61 13.11 103 3.392

20 68.66 62 12.65 104 3.296

21 65.62 63 12.21 105 3.203

44

Unit dimensions

RVD 351-521 DC Indoor unit

650

RVD 681-1051 DC Indoor unit

950

650

950

580

840

400

580

610880

28

580

600

840

300 254

28

840

RVD 351-1051 DC Outdoor unit

A

RVD 351 DC RVD 521 DC RVD 681 DC RVD 1051 DC

A 760 840 895 990
B 270 310 313 354
C 590 700 862 966

D 530 560 860 600

E 290 335 315 375

We reserve the right to modify the dimensions and constructional design as part of the ongoing technical development process.

B

E

C

D

All values in mm

45

REMKO RVD...DC

Exploded view RVD 351DC IT to RVD 1051DC IT

5

1

2

14

6

3

9

8

10

7

We reserve the right to modify the dimensions and constructional
design as part of the ongoing technical development process.

11

12

13

Spare parts list

No. Designation RVD 351 DC IT RVD 521 DC IT RVD 681 DC IT RVD 1051 DC IT

1 Air inlet guard 1110950 1110950 1111550 1111550
2 Air filter 1110951 1110951 1111551 1111551
3 Cover 1110952 1110952 1111552 1111552
4 Fin motor 1110953 1110953 1111553 1111553
5 Air inlet, condensate pan module 1110954 1110954 1111554 1111554
6 Outlet fins, set of 4 1110955 1110956 1111555 1111555
7 Vaporiser 1110957 1110958 1111556 1111557
8 Condensation pump cpl. 1110959 1110959 1110959 1110959

9 Fan wheel 1110960 1110961 1111558 1111559
10 Vaporiser fan motor 1110962 1110963 1111560 1111561
11 Control PCB 1110964 1110965 1111562 1111563
12 Transformer 1110966 1110966 1111564 1111564
13 Condenser, vaporiser fan 1110967 1110968 1111565 1111565
14 IR remote control 1111566 1111566 1111566 1111566

Spare parts (not illustrated)

Condensation float switch 1110970 1110970 1110970 1110970
Display board 1110971 1110971 1111567 1111567
Air circulation sensor 1110972 1110972 1110972 1110972
Vaporiser sensor 1110973 1110973 1110973 1110973

When ordering spare parts, please state the computerised part no., unit number and type (see identification plate)!

46

Exploded view RVD 351-1051 DC AT

5

6

4

11

8

9

3

2

12

10

1

7

We reserve the right to modify the dimensions and constructional
design as part of the ongoing technical development process.

Spare parts list

No. Designation RVD 351 DC AT RVD 521 DC AT RVD 681 DC AT RVD 1051 DC AT

1 Front panel

2 Fan blade, liquefier

3 Fan motor, liquefier

4 Liquefier

5 Cover panel

6 Side part

7 Compressor, cpl.

8 Stop valve, suction pipe

9 Stop valve, injection pipe

10 Reverse flow valve

11 Control PCB

12 Condenser, compressor

Spare parts (not illustrated)

E-Box, complete

Electronic expansion valve

PCB with display

Temperature sensors, set

When ordering spare parts, please state the computerised part no. and unit number (see identification plate) !

1110990 1110991 1111580 1111581

1110992 1110993 1111582 1111583

1110994 1110995 1111584 1111585

1110996 1111021 1111586 1111587

1110998 1110999 1111588 1111589

1111000 1111001 1111590 1111591

1111002 1111022 1111592 1111593

1111004 1111005 1111594 1111595

1111006 1111007 1111596 1111597

1111008 1111009 1111598 1111599

1111010 1111011 1111600 1111601

1111012 1111013 1111602 1111603

1111014 1111015 1111604 1111605

--- 1111016 1111606 1111607

--- 1111018 1111608 1111609

1111019 1111020 1111020 1111020

47

REMKO RVD...DC

Technical data

Range RVD 351DC RVD 521DC RVD 681DC RVD 1051DC

Operational mode Cooling / heating
Nominal cooling output

Nominal heating output
Energy efficiency class, cooling
Energy efficiency ratio EER
Energy efficiency class, heating
Coefficient of performance COP
Power consumption, annual, (500h) C/H 530 / 595 1090 / 1060 1190 / 1060 1625 / 1600
Operating range (room volume), approx. m³ 110 160 230 320
Coolant 410A
Power supply V/Hz 230/1~/50 Hz 400 / 3~ / 50
Nom. elect. power consumption,cooling 1)kW
Nom. elect. power consumption,heating 2)kW
Electr. rated power consumption kW
Electr. nominal power consumpt. cooling 1)A
Electr. nominal power consumpt. heating 2)A
Electr. starting current, max. A 12,0 12,0 15,5 25,0

Coolant connection - injection line

Coolant connection - suction line

Max. operating pressure kPa

Corresponding indoor unit

Adjustment range, room temperature °C +17-+30
Operating range °C +17-+31
Air flow volume per speed setting m³/h 510/530/680 560/710/800 820/1010/1220 1100/1300/1530
Sound pressure level per speed setting 3)dB(A) 33/37/40 37/40/42 39/41/43 41/42/44
Protection degree IP X0
Condensate drain mm 25 32
Condensate pump, flow rate, max. mmWS 500 750
Dimensions - Height mm 255 250 300

Width mm 580 840

Depth mm 580 840
Dimensions Cover length / width mm 650 / 650 950 / 950
Weight kg

Corresponding outdoor unit

Operating range - cooling °C +5 - +43
Operating range - heating °C -5 - +24
Air flow rate, max. m³/h 1600/2500 2300/2570 3000 /3250 5800 /6000
Protection degree IP 24
Noise output max.
Refrigerant, basic quantity kg 1,40 1,70 2,30 4,10
Refrigerant, additional quantity > 5 m g/m 30 30 30 30
Refrigerant pipe, max. length m 15 25 25 30
Refrigerant pipe, height indoor unit and

outdoor unit max.
Dimensions - Height mm 590 700 860 990

Width mm 760 845 895 940

Depth mm 280 310 335 360
Weight kg 39,0 59,0 73,0 87,0
Serial number 548... 549... 713... 714...
EDP no. 1623160 1623170 1623180 1623190

1) Air intake temp. TK 27°C / FK 19°C, outdoor temp. TK 35°C / FK 24°C, max. air volume, 5m pipe length in combination with MVT 900 / 950 DC

2) Air intake temperature TK 20°C outdoor temperature TK 7°C, FK 6°C, max. air volume, 5m pipe length in combination with MVT 900 / 950 DC

3) Gap 1 m free space 4) Contains greenhouse gas according to Kyoto protocol

48

1)

2)

1)

1)

2)

2)

kW
kW

3,52 (1,41 to 4,11) 5,27 (1,59 to 5,65) 7,03 (1,63 to 7,92) 10,55 (3,01 to 13,22)
4,29 (1,43 to 4,83) 5,86 (1,45 to 6,15) 7,76 (1,75 to 8,61) 11,72 (3,75 to 14,02)

A A A A

3,32 3,25 3,22 3,25

A A B A

3,61 3,80 3,42 3,64

4)

1,06 (0,41-1,45) 1,62(0,56-2,63) 2,18 (0,84-2,35) 3,25 (2,31-5,50)
1,19 (0,38-1,88) 1,54 (0,72-2,65) 2,12 (0,72-2,72) 3,20 (2,00-5,22)

1,90 2,60 3,25 5,50

4,34 (2,02-12,24) 7,08 (2,43-12,35) 10,30 (3,65-11,52) 14,62 (10,09-25,01)

6,64(2,06-12,03) 6,82 (3,13-12,32) 10,05 (3,22-12,81) 14,35 (8,69-23,64)

Inches

(mm)

Inches

(mm)

1/4 (6,35) 1/4 (6,35) 3/8 (9,52) 3/8 (9,52)

1/2 (12,70) 1/2 (12,70) 5/8 (15,90) 5/8 (15,90)

4200 / 2500

RVD 351DC IT RVD 521DC IT RVD 681DC IT RVD 1051DC IT

18,0 21,0 29,0 30,0

RVD 351DC AT RVD 521DC AT RVD 681DC AT RVD 1051DC AT

3)

dB(A) 48 52 53 55

m 10 10 10 20

3, 0

2, 5

1, 5

2, 0

3, 5

4, 0

4, 5

1, 0

0 3 6 9 12 -15 -12 -9 -6

-3

0, 80

1, 00

1, 20

1, 40

0, 30

0, 50

0, 70

7. 00

7, 00

6. 50

5. 50

6. 00

7. 50

8. 00

8. 50

5. 00

1. 50

2. 00

2. 50

3. 00

0. 90

0. 95

1. 00

4. 50

0

3 6 9 12 -15 - 11

-9

-6

-3

15

18

14, 00

2. 50

3. 00

3. 50

4. 00

0. 90

1. 00

2. 00

13, 00

12, 00

11, 00

10, 00

9, 00

8, 00

7, 00

6, 00

0

3 6 9 12 -15 - 11

-9

-6

-3

15

18

Performance charts for heating

RVD 351 DC

1

Heating output

Elec. power consumption

Outdoor temperature

RVD 521 DC

6. 50

6. 00

5. 50

1

5, 00

4. 50

4. 00

3. 50

Heating output

3. 00

1. 70

1. 60

1. 50

1. 40

1. 30

1. 20

1. 10

Elec. power consumption

-9

-3

-6

Outdoor temperature

3 6 9 12 -15 - 11

0

15

18

RVD 681 DC

1

RVD 1051 DC

1

Heating output

Heating output

Elec. power consumption

Elec. power consumption

Outdoor temperature

1) Air intake temperature TK 20°C, outdoor temperature TK 7°C, FK 6°C, max. air flow volume, 5m pipe length

Outdoor temperature

We reserve the right to modify the dimensions and constructional design as part of the ongoing technical development process.

49

REMKO RVD...DC

EC – Declaration of Conformity

in accordance with the Machinery Directive, Annex II 1A

Original Declaration of Conformity

We hereby declate that the devices described in the following section conform to the require­ments of the specified applicable EC directives due to their design and type in the version as
marketed by us.

Name of Manufacturer: REMKO GmbH & Co. KG
Klima- und Wärmetechnik
Im Seelenkamp 12
D - 32791 Lage

Name of Authorised Agent: REMKO GmbH & Co. KG
Klima- und Wärmetechnik
Im Seelenkamp 12
D - 32791 Lage

Equipment (machinery) - Implementation: Inverter ceiling-mounted air conditioner in
split design

Series / Model:
RVD 681 DC, RVD 1051 DC
Series / Class Number: 548..., 549..., 713..., 714...

Applicable regulations:
MA DIR. 2006/42/EC Machinery Directive
LV DIR. 2006/95/EC Low-Voltage Directive
EMC DIR. 2004/108 EEC Electromagnetic Compatibility Directive
EnCLB DIR. 92/75/EEC Energy Consumption Labelling Directive
EC 97/23/EC Pressure Equipment Directive

Applicable Standards:
DIN EN ISO 12100-1-2 : 2004-04; DIN EN ISO 13857,
EN 14511 T1-4;
DIN 45635 - 1;
EN 378 – 1-4;
EN 55014 - 1; EN 55014 - 2; EN 55104
EN 60204 - 1; EN 60335 - 1; EN 60335 - 2 - 40;
EN 61000 - 3 - 2; EN 61000 - 3 - 3;

REMKO RVD 351DC, RVD 521 DC,

Lage, 22nd January 2010 REMKO GmbH & Co. KG

..............................................

Signature, Product Manager

50

REMKO INTERNATIONAL

… and also right in your neighbourhood!
Make use of our experience and advice

REMKO GmbH & Co. KG
Klima- und Wärmetechnik

Im Seelenkamp 12 D-32791 Lage
Postfach 1827 D-32777 Lage
Telefon [phone]
Telefax [phone]
E-mail [e-mail]
Internet www.remko.de

Hotline

Klima- und Wärmetechnik

[phone]

Export

[phone]

Advice

We keep the specialist knowl-

edge of our advisers continu-

ously up-to-date with intensive

training. This has earned us a

reputation as more than just a

good, reliable supplier:

REMKO, a partner

who is here to help solve prob-

lems.

Distribution

REMKO provides not only a

well-developed distribution

network in Germany and abroad,

but also unusually highly skilled

professionals in distribution.

REMKO staff in the field are

more than mere salespeople:

they must primarily act as

advisers in air conditioning and

heating technology for our

customers.

Customer Service

Our units work precisely and

dependably. Should a failure

occur, however, REMKO cus-

tomer service will rapidly be at

your side. Our comprehensive

network of experienced dealers

guarantees quick and

reliable service.

Subject to technical modifications, no responsibility taken for the correctness of information!