REMKO ETF-S Series User manual

Operating and
installation instructions
Read the instructions prior to performing any task!
REMKO ETF-S Series
ETF 650-S
Stationary air dehumidifier
0305-2022-01 Edition 1, en_GB

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

Table of contents
1 Safety and usage instructions............................................................................................................. 4
1.1 General safety notes....................................................................................................................... 4
1.2 Identification of notes...................................................................................................................... 4
1.3 Personnel qualifications.................................................................................................................. 4
1.4 Dangers of failure to observe the safety notes................................................................................ 4
1.5 Safety-conscious working............................................................................................................... 5
1.6 Safety instructions for the operator................................................................................................. 5
1.7 Safety notes for installation, maintenance and inspection work...................................................... 5
1.8 Unauthorised modification and changes......................................................................................... 6
1.9 Intended use................................................................................................................................... 6
1.10 Warranty........................................................................................................................................ 6
1.11 Transport and packaging............................................................................................................... 6
1.12 Environmental protection and recycling........................................................................................ 7
2 Technical data........................................................................................................................................ 8
2.1 Unit data.......................................................................................................................................... 8
3 Design and function.............................................................................................................................. 9
3.1 Air dehumidification - general note.................................................................................................. 9
3.2 Unit description............................................................................................................................. 12
4 Assembly............................................................................................................................................. 13
5Electrical wiring................................................................................................................................... 14
5.1 General notes................................................................................................................................ 14
5.2 Electrical wiring diagram............................................................................................................... 14
6 Commissioning................................................................................................................................... 15
7 Condensate removal........................................................................................................................... 17
8 Troubleshooting and customer service............................................................................................ 18
9 Shutdown............................................................................................................................................. 20
10 Care and maintenance........................................................................................................................ 21
10.1 Care and maintenance................................................................................................................ 21
10.2 Maintenance protocol.................................................................................................................. 24
11 View of the unit and spare parts........................................................................................................ 25
11.1 View of the unit............................................................................................................................ 25
11.2 Spare parts list............................................................................................................................ 26
12 Index..................................................................................................................................................... 27
3

1 Safety and
usage instructions
1.1 General safety notes
Carefully read the operating manual before com-
missioning the units for the first time. It contains
useful tips and notes such as hazard warnings to
prevent personal injury and material damage.
Failure to follow the directions in this manual not
only presents a danger to people, the environment
and the system itself, but will void any claims for
liability.
Keep this operating manual and the refrigerant
data sheet near to the units.
The refrigerant used in the system is flammable. If
applicable, observe the local safety conditions.
Caution, risk of re
1.2 Identification of notes
This section provides an overview of all important
safety aspects for proper protection of people and
safe and fault-free operation.The instructions and
safety notes contained within this manual must be
observed in order to prevent accidents, personal
injury and material damage.
Notes attached directly to the units must be
observed in their entirety and be kept in a fully
legible condition.
Safety notes in this manual are indicated by sym-
bols. Safety notes are introduced with signal words
which help to highlight the magnitude of the danger
in question.
DANGER!
Contact with live parts poses an immediate
danger of death due to electric shock. Damage
to the insulation or individual components may
pose a danger of death.
DANGER!
This combination of symbol and signal word
warns of a situation in which there is immediate
danger, which if not avoided may be fatal or
cause serious injury.
WARNING!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may be fatal or cause
serious injury.
CAUTION!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may cause injury or mate-
rial and environmental damage.
NOTICE!
This combination of symbol and signal word
warns of a potentially hazardous situation,
which if not avoided may cause material and
environmental damage.
This symbol highlights useful tips and recom-
mendations as well as information for efficient
and fault-free operation.
1.3 Personnel qualifications
Personnel responsible for commissioning, opera-
tion, maintenance, inspection and installation must
be able to demonstrate that they hold a qualifica-
tion which proves their ability to undertake the
work.
1.4 Dangers of failure to observe
the safety notes
Failure to observe the safety notes may pose a risk
to people, the environment and the units. Failure to
observe the safety notes may void any claims for
damages.
REMKO ETF-S Series
4

In particular, failure to observe the safety notes
may pose the following risks:
nThe failure of important unit functions.
nThe failure of prescribed methods of mainte-
nance and repair.
nDanger to people on account of electrical and
mechanical effects.
1.5 Safety-conscious working
The safety notes contained in this manual, the
existing national regulations concerning accident
prevention as well as any internal company
working, operating and safety regulations must be
observed.
1.6 Safety instructions for the oper-
ator
The operational safety of the units and compo-
nents is only assured providing they are used as
intended and in a fully assembled state.
This unit can be used by children above the age of
8, as well as by people with impaired physical,
sensory or mental capabilities or a lack of experi-
ence and knowledge if they are supervised or have
received instruction in the safe operation of the
unit, and if they understand the associated poten-
tial hazards. Children must never play with the unit.
Cleaning and user maintenance must not be car-
ried out by unsupervised children.
nThe units and components may only be set up,
installed and maintained by qualified per-
sonnel.
nIf the mains power supply line of this unit is
damaged, this must be replaced by the manu-
facturer or their customer services department
or a similarly qualified person in order to avoid
any hazard.
nDo not operate units or components with
obvious defects or signs of damage.
nThe units may not be installed or operated in
explosive environments.
nThe units must not be installed or operated in
atmospheres containing oil, sulphur, chlorine or
salt.
nThe units must be installed upright and in a
stable position.
nThe units and components must not be
exposed to any mechanical load, extreme
levels of humidity or extreme temperatures.
nAll housing parts and unit openings, e.g. air
inlets and outlets, must be free from foreign
objects. An unobstructed air inlet and air outlet
must be guaranteed at all times.
nThe units must not be covered during opera-
tion.
nNever insert foreign objects into the units.
nThe units must not be transported while they
are running.
nThe units must only be transported when the
condensate container is empty and the evapo-
rator is dry.
nAll electrical cables on the outside of the units
must be protected against damage (e.g. by ani-
mals etc.).
nBefore each change of location, the conden-
sate container must be emptied.
nThe units must be inspected by a service tech-
nician to ensure that they are safe to use and
fully functional at least once yearly. Visual
inspections and cleaning may be performed by
the operator when the units are disconnected
from the mains.
nThe refrigerant R32 fulfils the requirements of
the European F-Gas regulation.
nThe unit must not be burned, drilled or pierced.
nRooms in which refrigerant may escape must
be adequately aerated and ventilated. Other-
wise there is danger of suffocation.
NOTICE!
Extensions to the connection cable must only
be conducted by authorised specialist electri-
cians, taking into consideration the unit power
consumption, cable length and local use.
NOTICE!
Work on the refrigerant system and on the elec-
trical equipment must only be conducted by a
specially-authorised specialist!
1.7 Safety notes for
installation, maintenance and
inspection work
nAppropriate hazard prevention measures must
be taken to prevent risks to people when per-
forming installation, repair, maintenance or
cleaning work on the units.
nThe setup, connection and operation of the
units and its components must be undertaken
in accordance with the usage and operating
conditions stipulated in this manual and comply
with all applicable regional regulations.
nIf the mains power supply line of this unit is
damaged, this must be replaced by the manu-
facturer or their customer services department
or a similarly qualified person in order to avoid
any hazard.
nThe units must be installed upright and in a
stable position.
nThe units must not be exposed to direct jets of
water, e.g. pressure washers etc.
5

nSafety devices may not be modified or
bypassed.
nThe units and components may only be set up,
installed and maintained by qualified per-
sonnel.
nDo not operate units or components with
obvious defects or signs of damage.
nThe units may not be installed or operated in
explosive environments.
nThe units must not be installed or operated in
atmospheres containing oil, sulphur, chlorine or
salt.
nThe units and components must not be
exposed to any mechanical load, extreme
levels of humidity or extreme temperatures.
nAll housing parts and unit openings, e.g. air
inlets and outlets, must be free from foreign
objects. An unobstructed air inlet and air outlet
must be guaranteed at all times.
nAll electrical cables on the outside of the units
must be protected against damage (e.g. by ani-
mals etc.).
nThe units must be inspected by a service tech-
nician to ensure that they are safe to use and
fully functional at least once yearly. Visual
inspections and cleaning may be performed by
the operator when the units are disconnected
from the mains.
nThe refrigerant R32 used in the system is flam-
mable. If applicable, observe the local safety
conditions.
nNote that refrigerant may be odourless.
1.8 Unauthorised modification
and changes
Modifications or changes to units and components
are not permitted and may cause malfunctions.
Safety devices may not be modified or bypassed.
Original replacement parts and accessories
authorised by the manufactured ensure safety. The
use of other parts may invalidate liability for
resulting consequences.
1.9 Intended use
The units are designed exclusively for drying and
dehumidification purposes in industrial or commer-
cial situations on the basis of their structural design
and equipment. The units must only be operated
by appropriately instructed personnel.
Any different or additional use is a non-intended
use. The manufacturer/supplier assumes no lia-
bility for damages arising from non-intended use.
The user bears the sole risk in such cases.
Intended use also includes working in accordance
with the operating and installation instructions and
complying with the maintenance requirements.
The threshold values specified in the technical
data must not be exceeded.
1.10 Warranty
For warranty claims to be considered, it is essential
that the ordering party or its representative com-
plete and return the "certificate of warranty" to
REMKO GmbH & Co. KG at the time when the
units are purchased and commissioned.
The warranty conditions are detailed in the "Gen-
eral business and delivery conditions". Further-
more, only the parties to a contract can conclude
special agreements beyond these conditions. In
this case, contact your contractual partner in the
first instance.
1.11 Transport and packaging
The devices are supplied in a sturdy shipping con-
tainer. Please check the equipment immediately
upon delivery and note any damage or missing
parts on the delivery and inform the shipper and
your contractual partner. For later complaints can
not be guaranteed.
WARNING!
Plastic films and bags etc. are dangerous
toys for children!
Why:
- Leave packaging material are not around.
- Packaging material may not be accessible to
children!
REMKO ETF-S Series
6

1.12 Environmental protection
and recycling
Disposal of packaging
All products are packed for transport in environ-
mentally friendly materials. Make a valuable contri-
bution to reducing waste and sustaining raw mate-
rials. Only dispose of packaging at approved
collection points.
Disposal of equipment and components
Only recyclable materials are used in the manufac-
ture of the devices and components. Help protect
the environment by ensuring that the devices or
components (for example batteries) are not dis-
posed in household waste, but only in accordance
with local regulations and in an environmentally
safe manner, e.g. using certified firms and recy-
cling specialists or at collection points.
7

2 Technical data
2.1 Unit data
Unit type ETF 650-S
Daily dehumidification capacity max. l/day 65
- at 30 °C and 80 % r.h. l/day 60
- at 20 °C and 70 % r.h. l/day 32
- at 15 °C and 60 % r.h. l/day 15
Ventilation capacity max. m3/h 600
Operating range, temperature °C 12-38
Operating range, humidity % RH 30-100
Sound pressure level LpA 1m 2) dB(A) 38.3-45.6
Compressor Inverter
Refrigerant 1) R32
Refrigerant quantity kg 0.5
GWP 675
CO2 equivalent t 0.338
Power supply V/Ph/Hz 230/1~/50
Max. rated current consumption A 0.48-3.17
Max. power consumption kW 0.11-0.76
Electrical protection provided by customer A 10
Enclosure class IPX4
Connection cable length m 5
Dimensions
Depth mm 291
Width mm 850
Height mm 770
Weight kg 53
1) Contains greenhouse gas according to Kyoto protocol
2) Noise measurement EN 12102-1 and EN ISO 3745
We reserve the right to modify the dimensions and design as part of the ongoing technical development
process.
REMKO ETF-S Series
8

3 Design and function
3.1 Air dehumidification -
general note
The correlations occurring when air is dehumidified
are based on physical laws. These are depicted
here in graphical form in order to provide you with
a brief overview of the principles of air dehumidifi-
cation
The use of REMKO air dehumidifiers
nEven if windows and doors are well insulated,
water and moisture are still capable of pene-
trating thick concrete walls.
nThe water required for setting in the production
of concrete, mortar and plaster etc. may only
be diffused after 1-2 months.
nEven moisture trapped in the masonry after
high-water or a flood is released very slowly.
nThe same is also true of moisture contained in
stored materials for example.
The moisture (water vapour) released from parts of
a building or materials is absorbed by the sur-
rounding air. As a result, the moisture content
increases, which ultimately gives rise to corrosion,
mould, rot, peeling of paint and other unwanted
damage. By way of example, the diagram below
shows the corrosion rate of metal in different levels
of humidity.
A
B
Fig. 1: Corrosion rate in relation to relative humidity
A: Corrosion rate
B: Relative humidity [%]
It is evident that the corrosion rate below 50% rela-
tive humidity (RH) is low, and below 40% is negli-
gible.
The corrosion rate increases significantly above
60% RH. This threshold for damage as the result
of humidity also applies to other materials, such as
powdery substances, packaging, wood and elec-
tronic units.
Buildings may be dried in a variety of ways:
1. By heating and air exchange: The air in the
room is heated in order for moisture to be
removed and then this air is fed outside. All
of the energy that is involved is lost together
with the moist air that is released.
2. By air dehumidification: The moist air that is
present within an enclosed space is continu-
ously dehumidified in accordance with the
condensation principle.
With regard to energy consumption, air dehumidifi-
cation has one distinct advantage:
Energy expenditure is limited exclusively to the air
volumes present. The mechanical heat that is
released by the dehumidification process is fed
back into the room.
NOTICE!
Under normal use, the air dehumidifier uses
approximately 25% of the energy that is
required for the "heating and ventilating" prin-
ciple.
9

Relative air humidity
Our ambient air is a gaseous mixture which always
contains a certain volume of water in the form of
water vapour. This volume of water is specified in g
per kg of dry air (absolute moisture content).
1m3 of air weighs approx. 1.2 kg at 20 °C
Depending on the temperature, each kg of air is
only capable of absorbing a certain volume of
water vapour. Once this capacity has been
reached, the air is referred to as "saturated" and
has a relative humidity (RH) of 100%.
Relative humidity is understood to mean the ratio
between the current quantity of water vapour in the
air and the maximum possible quantity of water
vapour at the same temperature. The ability of the
air to absorb water vapour increases as the tem-
perature rises. I.e. the maximum possible (abso-
lute) water content becomes greater as the tem-
perature rises.
Temp. Water vapour content in g/m3
at humidity of
°C 40% 60%
-5 1.3 1.9
+10 3.8 5.6
+15 5.1 7.7
+20 6.9 10.4
+25 9.2 13.8
+30 12.9 18.2
°C 80% 100%
-5 2.6 3.3
+10 7.5 9.4
+15 10.2 12.8
+20 13.8 17.3
+25 18.4 23.0
+30 24.3 30.3
Drying materials
Building materials and structures are capable of
absorbing considerable volumes of water, such as
brick 90-190 l/m³, heavy concrete 140-190 l/m³ and
limestone 180-270 l/m³. The drying of moist mate-
rials such as masonry is effected as follows:
The moisture moves from the inside of the material
to its surface.
Fig. 2: Drying damp masonry
nEvaporation occurs on the surface = Transfer
of water vapour to the ambient air
nThe air containing water vapour is constantly
circulated through the REMKO air dehumidifier.
The air is dehumidified and, slightly heated,
leaves the unit in order to re-absorb water
vapour
nIn this way, the moisture contained in the mate-
rial is reduced gradually
The material is dried!
The accumulated condensate is collected in the
unit and drained off from there.
Fig. 3: Extracting and collecting condensate
REMKO ETF-S Series
10

Functional principle of the air dehumidifier
As it flows through or over the evaporator, the air stream is cooled to dew point. The water vapour con-
denses, and is collected in a condensate trap from where it is drained off.
2
1
A
B
C
a
Fig. 4: Functional principle of the air dehumidifier
1: Evaporator
2: Condenser
A: Air temperature
B: Air direction
C: Humidity
a: Progression
The condensation of water vapour
Because the capacity for the maximum possible
volume of water vapour increases as the air is
heated, the volume of water vapour contained
remains constant and so relative humidity falls.
In contrast, because the capacity for the maximum
possible volume of water vapour decreases as the
air is cooled, the volume of water vapour contained
remains constant and so relative humidity
increases. If the temperature continues to fall, the
capacity for the maximum possible volume of water
vapour is reduced so much so that it is ultimately
equal to the volume of water vapour contained in
the air.
This temperature is referred to as the dew point. If
the air is cooled to below dew point, the volume of
water vapour in the air will become greater than
the maximum possible volume of water vapour. At
this point, the water vapour begins to precipitate. It
then condenses to water. Humidity is then
removed from the air.
Examples of condensation include steamed-up
window panes in winter, or the moisture on the out-
side of a cold drinks bottle.
As the relative humidity of the air increases, so too
does the dew point, making it easier for the tem-
perature to fall below it.
Condensation heat
The energy transferred to the air from the con-
denser consists of:
1. the amount of heat derived beforehand in the
evaporator
2. the electrical drive energy
3. the condensation heat released by the lique-
fying of the water vapour.
11

Energy must be supplied when liquid is converted
into a gas. This energy is designated as evapora-
tion heat. It does not cause any increase in tem-
perature, but is required to convert a liquid into a
gas. Conversely, energy is released when gas is
liquefied, this is designated as condensation heat.
The amount of energy from evaporation heat and
condensation heat is the same.
For water, this is: 2250 kJ/kg (4.18 kJ = 1kcal)
From this it is evident that the condensation of
water vapour causes a large quantity of energy to
be released. With drying operations, a heat cycle is
created, whereby heat is consumed for evapora-
tion and released for condensation.
Generally speaking, the time required for the
drying process is not only dependent on the
output of the unit, but is determined to a greater
extent by the speed at which the material or
building section loses its moisture.
3.2 Unit description
The units have been designed for universal and
straightforward air dehumidification.
Their compact dimensions allow the unit to be
transported and set up with ease.
The units operate in accordance with the conden-
sation principle and are equipped with a hermeti-
cally sealed refrigerant system, low-noise and low-
maintenance fan and connection cable with plug.
The fully-automated electronic controller, an inte-
grated hygrostat and connection ports for conden-
sate drainage provided by the customer ensure
continuous fault-free operation.
The units conform to the fundamental health and
safety requirements of the appropriate EU regula-
tions. The units are dependable and offer ease of
operation.
Locations at which units are used
The units are used in all locations, where dry air is
a must and where economic consequential
damage (such as that caused by mould) must be
prevented.
The units may be used for the drying and dehumid-
ification of areas such as:
nNew buildings, industrial buildings
nStorage rooms
nArchives, laboratories
nWeekend homes
nBathrooms, wash rooms and changing rooms
etc.
nMuseums, libraries
nGarages
Operating sequence
The unit is switched on and off using the integrated
hygrostat.
The hygrostat is set to 60 % RH in the factory. The
respective unit function is indicated by an LED dis-
play on the front of the unit.
The fan draws in the humid room air via the dust
filter on the underside of the unit. Heat is removed
from the room air on the cold evaporator. The air is
then cooled to below dew point. The water vapour
contained in the room air is then deposited as con-
densate or rime on the evaporator fins. On the
condenser, the cold and dehumidified air is
warmed up again and discharged back into the
room above the unit with a temperature increase of
around 5 K above the room temperature. The pro-
cessed, dry air therefore continuously mixes with
the room air. Continuous circulation of the room air
through the unit gradually reduces the relative
humidity (% RH) in the room to the desired
humidity level.
REMKO ETF-S Series
12

A
B
B
A
Fig. 5: Air dehumidification operating principle
A: Moist room air B: Dehumidified room air
4 Assembly
Setting up the unit
For the best economic and safe use of the units,
the following notes must be followed in full:
nThe units must be set up in an upright and
level position, to ensure that the condensate
can drain freely
nThe unit must be mounted or set up upright to
ensure that air can be taken in and blown out
freely
nUnits must never be set up in the immediate
vicinity of heaters or other sources of heat
nThe room being dried or dehumidified must be
closed to the surrounding atmosphere
nAir circulation is improved if the unit is set up
approx. 1 m above the ground
nAvoid having opened windows and doors etc.,
and avoid frequent entry to or exit from the
room as much as possible
nIf the units are to be used in dusty environ-
ments, appropriate care and maintenance
measures should be taken in accordance with
the relevant conditions
nThe output of the unit is entirely dependent on
the conditions inside the room, room tempera-
ture, relative humidity and observance of the
set-up instructions
nThe units may not be used in environments
containing a great deal of dust or chlorine, or in
places with atmospheres containing ammonia
nThe distance between the unit and the ceiling
must be at least 1 m
nThe distance between the unit and the floor
must be at least 0.1 m
nFor service work, a minimum distance of 1 m
must be maintained between walls and the
sides of the unit
NOTES:
–Keep windows and doors closed!
–Maintain adequate clearance from heaters
or other sources of heat.
13

5 Electrical wiring
5.1 General notes
nThe devices are operated with 220-240 V/50
Hz alternating current
nThe electrical connection is made using a built-
in mains cable with earthed safety plug
nExtensions to the connection cable may only
be carried out by authorised electricians, sub-
ject to the length of the cable, connected load
of the unit and taking into consideration how
the unit is used at its location
WARNING!
The electrical connection to the units must be
made at feed-points with residual current
devices in accordance with VDE 0100, Section
704. When installing the units in extremely
damp environments such as laundry rooms,
showers etc., the unit must secured with a
residual current device provided by the cus-
tomer in accordance with the regulations.
CAUTION!
All cable extensions must only be used in fully
un-reeled or reeled off condition.
5.2 Electrical wiring diagram
L N PE
CN21
WCTIL
DIN1
DIN2
DIN3
DIN4
DIN5
SW1
JP1
CN19
OUT5
OUT4
OUT3
CON SW
BAG +12V CN12
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
CN24
CL
OUT1A
OUT1
AC-L
T5A/250V
AC-N
MDRV DCFM
DCHV
ACOUT 1
ACIN 1
ACIN2 ACOUT2
FUSE002
CN3
W
V
UCN1
CN6
AC1
LA
AC2
LB
SP
CM
DC
FM
PE
A2
A4
A5
A6
A7
A8
EV
D5
D4DP
PFC
PCB
IVB
Fig. 6: Electrical wiring diagram
A2 (brown): Air outlet sensor
A4 (green): Vaporiser sensor
A5 (red): Hot gas sensor
A6 (black): Suction gas sensor
A7 (yellow): Room temperature sensor
A8 (white): Humidity probe
CM: Compressor
D4: Low pressure switch
D5: High pressure switch
DC FM: Fan motor
DP: Display
EV: Expansion valve
SP: Choke
IVB: Inverter board
PCB: Control board
PFC: Wave-trap
We reserve the right to modify the dimensions and design as part of the ongoing technical development
process.
REMKO ETF-S Series
14

6 Commissioning
Before commissioning the unit or if local require-
ments dictate, the air-inlet grill and air-outlet grill
must be checked for contamination.
NOTICE!
A contaminated grille or filter must be cleaned
or replaced immediately.
Important notes prior to commissioning
nAll extensions to the electrical connection must
be of a sufficient cable size and must only be
used fully rolled out or unrolled.
nNever use the power supply connection cable
as a pull cord.
nAfter being switched on, the units operate fully-
automatically until the desired humidity is
reached.
nThe condensate drainage line must be installed
properly.
nIn order to prevent damage to the condenser,
the units are equipped with a mechanism that
prevents the compressor being immediately
switched back on after it is switched off
The compressor only switches back on
after a waiting time of approx. 3 minutes!
NOTICE!
In room temperatures below 15 °C and/or rela-
tive humidity below 40%, economical use of the
unit can no longer be guaranteed.
Starting the unit
Start the unit as follows:
1. Plug the unit's power plug into a properly
installed and fused mains socket (220-240
V/50 Hz).
If you connect the dehumidifier to the mains
for the first time, the unit should be switched
off (not operating). The system starts up for
approx. 30 seconds until the display shows
"0%" in the top right corner.
2. Actuate the "ON / OFF" key.
The display switches on and shows the cur-
rent humidity and temperature in the room.
The desired humidity can be set using the
arrow keys. First, the fan is switched on and
ramps up linearly to the set speed. The com-
pressor starts after approx. 2 minutes and
also ramps up linearly to the target speed.
Automatic restart after power failure:
If the electrical power fails or if the power plug is
pulled out during operation, the unit switches off.
When the unit is switched back on again or if the
power plug is put back in again the unit starts up
again automatically.
WARNING!
To avoid damage to the compressor, the unit
must only be switched off from the unit display.
Disconnect from the mains only after the com-
pressor and fan have shut down and come to a
standstill. Control via external switching devices
(e.g. timers or network sockets) is also pro-
hibited.
Control and display panel:
1
2
3
8
7
5
9
10
6
4
Fig. 7: Control panel
15

1
On/off key:
After actuating the ON/OFF key whilst switched off,
the unit starts as soon as the humidity in the room
(RH) is above the target value set for the humidity
in the room.
The start sequence is:
Fan motor starts slowly, after approx. 2 minutes the
compressor switches on. The compressor is at full
power after about 1 1/2 minutes. During operation,
the control indicator [8] lights up on the display.
If the ON/OFF key is actuated during operation,
the unit and the control indicator [8] switch off. Fan
and compressor shut down in approx. 1 minute.
2
Silent mode:
By pressing the Silent key, the unit can be set to
Silent mode, whereby the compressor and fan only
operate at a maximum of 80% of their power. This
reduces the maximum unit volume.
The power level indicator [7] on the display shows
which mode the unit is in (2 bars = silent mode, 3
bars = standard mode).
The display switches itself into a stand-by state
(dimmed display brightness) after a few sec-
onds. Pressing any key reactivates the display
(full display brightness). Only the second press
of a key carries out the action.
3
Timer:
The unit can be switched on or off with a delay via
the timer. The timer indicator [10] and the hour
indicator [9] are required for setting.
The timer indicator shows whether it is a switch-on
delay (1) or a switch-off delay (0). The timer can be
set both when the unit is switched on and when it
is switched off.
By pressing the timer key, 1 appears on the timer
display and the hours on the hour display [9] flash.
Use the arrow key to set the number of hours (0-23
hours). These are confirmed by pressing the timer
key. Then the minutes (0-60 minutes) can be set
and confirmed by pressing the timer key. Then the
0 appears on the timer indicator. The switch-off
delay is set in the same way as the switch-on
delay (first hours, then minutes).
After setting the times, the respective symbol 1 or
0 lights up on the timer indicator [10]. A timer is
only set if the time (hours:minutes) is changed; if
the time is not changed, this time (0 or 1) is consid-
ered deactivated. The timer is only one time for
both the switch-on and switch-off delay. After suc-
cessfully switching the unit on or off, the timer is
deactivated.
4
Desired humidity setting:
After the unit is switched on, the target room
humidity can be adjusted up or down by pressing
the arrow keys. As soon as the room humidity rea-
ches the target humidity set, the compressor and
the fan motor stop. The target room humidity set is
displayed for 3 seconds during the adjustment and
then reverts to the current measured room
humidity.
NOTE:
nIf the unit is restarted it reverts to the pre-
vious setting
nThe adjustment steps for the target humidity
are 1% ( RH) per key press. The adjustment
range for the target humidity should lie
between 30% and 95% ( RH)
If the room humidity is below the set target room
humidity, the compressor and the fan motor stop. If
the room humidity is higher than the set target
room humidity, the unit restarts with a 3-minute
delay.
5
Humidity indicator:
The standard display is the current measured room
humidity. The humidity value to be changed is dis-
played for 3 seconds by pressing one of the arrow
keys [4] to set the target room humidity.
REMKO ETF-S Series
16

6
Room temperature indicator.:
Display of the currently measured room tempera-
ture in °C.
7
Power level indicator:
Display of the current power stage:
2 bars: Silent mode/ max. power throttled to 80
3 bars: Max. power
Can be changed by pressing the Silent key [2]
8
Control indicator:
If the symbol is visible, the fan and compressor are
in operation (target humidity below the measured
humidity). When the symbol disappears, the target
humidity has been reached and the fan and com-
pressor stop.
9
Power indicator or hour indicator:
The standard display is the current output of the
compressor between 0 to 100 %. If the unit is
switched off, only this indicator with 0% is visible.
When the timer key [3] is pressed, an hour format
(hh:mm) is displayed instead of the % indicator
and can be changed using the arrow keys [4].
10
Timer indicator:
The standard display shows whether a switch-on
delay (1) or switch-off delay (0) or both (0+1) are
active. By pressing the timer key, first the switch-on
delay (1) is set, then the switch-off delay (0).
7 Condensate removal
Condensate water drain
The condensate water drain is located on the unit's
base. The condensate drain is connected to the
discharge nozzle supplied. A solid or flexible 16
mm discharge connector can be installed on this.
nThe discharge hose must always be laid at an
incline of at least 2 % so that the water can
flow unhindered from the drip tray.
nAlternatively, a condensate pump can be fitted
to the unit in order to pump the condensate
water to a drainage point located at a higher
level.
nIf drainage is to be carried out through the wall,
the relevant measures such as holes for cor-
rect condensate drainage must be taken before
installing the unit.
nSee the diagram at the side for information on
the location of the drainage connection.
A
30
60
B
Fig. 8: Bottom of unit
A: Unit front
B: Wall
17

8 Troubleshooting and
customer service
The unit and components are manufactured using
state-of-the-art production methods and tested
several times to verify that they function correctly.
However, if malfunctions do occur, please check
the functions as detailed in the list below. Please
inform your dealer if the unit is still not working cor-
rectly after all function checks have been per-
formed!
WARNING!
Work on the refrigerant system and on the elec-
trical equipment must only be conducted by a
specially-authorised specialist!
Display of error codes
Error codes are displayed in the segment display
[5] instead of the humidity value.
5
Fig. 9: Segment display
REMKO ETF-S Series
18

Fault messages
Error
code Cause Remedial measures
E1 High pressure detected
nCheck installation conditions (free air inlet/outlet)
nCheck fan and fan motor
nCheck high pressure switch (resistance should be close to 0.
If the value is infinitely high, the high pressure switch must
be replaced).
nCheck the control board
E2 Low pressure detected
nCheck low pressure switch (resistance should be approxi-
mately 0. If the value is infinitely high, the low pressure
switch must be replaced)
nCheck for gas leakage
nCheck the control board
E5 Voltage not within permissible
range nEnsure a stable voltage between 180V-255V
E8 Temperature too high on the
hot gas side
nCheck installation conditions (free air inlet/outlet)
nCheck fan and fan motor
nCheck for gas leakage
nCheck the hot gas sensor
EA Temperature at the air outlet
too high
nCheck installation conditions (free air inlet/outlet)
nCheck fan and fan motor
Eb Ambient temperature not
within permissible range nEnsure ambient temperatures between 12-38°C
P0
Communication malfunction
between display and control
board
nCheck wiring between display and control board (WCTIL)
nCheck the display
nCheck the control board
P1 Air inlet sensor malfunction
(A7/yellow)
nCheck sensor and wiring to control board
nReplace if no error was found
P2 Air outlet sensor malfunction
(A2/brown)
P3 Hot gas sensor malfunction
(A5/red)
P5 Suction gas sensor malfunc-
tion (A6/black)
P6 Evaporator sensor malfunc-
tion (A4/green)
P7 Humidity sensor malfunction
(A8/white)
For more, see the next page
19

Error messages (continued)
Error
code Cause Remedial measures
P8 Heat sink sensor malfunction nReplace inverter board
P9 Faulty induction current nCheck and measure compressor
nCheck choke coil and inverter board.
PA Error in the restart memory nReplace the control board
F1 Error in the driver module of
the compressor
nCheck inverter board and wiring CN1
nCheck and measure compressor
nCheck the control board
F2 Malfunction of the wave-trap nCheck the wiring of the wave-trap, inverter and control board
nCheck wave-trap, inverter and control board
F3 Compressor malfunction
during start-up
nCheck and measure compressor
nCheck inverter board
F4 Compressor malfunction
during operation
F5 Overcurrent inverter malfunc-
tion
F6 Overtemperature inverter mal-
function
F7 Overflow protection
nDisconnect from the mains for at least 5 minutes
nCheck and measure compressor
nCheck inverter board
F8 Temperature at the heat sink
too high
nDisconnect from the mains for at least 5 minutes
nCheck fan and fan motor
nCheck heat sink (in front of the inverter board)
F9 Fan motor malfunction
nCheck wiring of control board to fan motor (DCFM)
nCheck the control board
nCheck fan motor
FA Overcurrent protection mains
filter malfunction
nDisconnect from the mains for at least 5 minutes
nCheck inverter board
9 Shutdown
Press the "ON/OFF" key. The control indicator
goes out, the compressor and fan then shut down.
If the units are inactive for long periods, disconnect
them from the mains power supply.
Beware of dripping condensate!
REMKO ETF-S Series
20