REMKO KWL 130 User manual

Edition GB – B05
REMKO KWL
KWL 130, KWL 160, KWL 180 (INOX), KWL 220 (INOX),
KWL 270 (INOX), KWL 320 (INOX), KWL 370 (INOX)
KWL 130 H, KWL 160 H, KWL 180 H (INOX),
KWL 220 H (INOX), KWL 270 H (INOX), KWL 320 H (INOX),
KWL 370 H (INOX)
Air-cooled Chiller and
Air-cooled Chiller with Heat Pump function
Operation · Technology · Spare parts

Contents
Read these operating instructions carefully
before commissioning / using the device!
These instructions are an integral part of the system and must always
be kept near or on the device.
This operating manual is a translation of the German original.
Subject to modifications; no liability accepted for errors or misprints!
Safety notes 4
Environmental protection and recycling 4
Guarantee 4
Transport and packaging 5
System description 5-6
System configuration 7
Operation 7-13
Care and maintenance 14
Shut-down 14
Trouble-shooting and customer service 15-17
Installation instructions for qualified personnel 18-20
Installation 21-25
Condensate draining and ensured discharge
25
Electrical connection 26-27
Electrical components 28
Electrical circuit diagram 29-33
Leak testing 34
Before commissioning 34-35
Commissioning 35-36
Unit dimensions 36
Characteristic curves 37-38
Exploded views 39/41
Spare parts lists 40/42
Technical data 43-46
EC-Declaration of Conformity 47
Made by REMKO
3

Safety notes
Disposal of packaging
All products are packed for
transport in environmentally
friendly materials. Make a valuable
contribution to reducing waste
and sustaining raw materials. Only
dispose of packaging at approved
collection points.
Disposal of 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. using certified firms
and recycling specialists or at
collection points.
Environmental
protection
and recycling
Carefully read the operating
instructions before commissioning
the equipment for service. 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 data sheet near the
unit.
■ The unit should be set up
and installed only by qualified
personnel.
■ The installation, connection and
operation of the units and their
components must be carried
out 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 supply is to be
adapted to the requirements
of the equipment.
■ The operational safety of
equipment and components
is only assured if they are
fully assembled and used as
intended. 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
in the device, e.g. air intakes
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, abrasive
and dirty areas or atmospheres.
■ Touching some parts of the
equipment can result in burns or
other injury.
■ Installation, repair and
maintenance work may be
carried out only by authorised
specialists. Visual inspections
and cleaning can be performed
by the operator as long as
power is disconnected from the
equipment.
■ To preclude any danger from
the equipment, 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.
Guarantee
Prerequisite for any claims under
guarantee is that the that the or-
dering party or their representative
complete and return the "certificate
of guarantee" and "commissioning
report" to REMKO GmbH & Co. KG
at the time when the equipment
and that the said documents are
returned to REMKO GmbH & Co.
KG. Guarantee terms are listed in
the "General Business and Delivery
Conditions". Furthermore, only
the parties to a contract can strike
special agreements beyond these
conditions. In this case, first contact
the contractual partner.
REMKO KWL (H)
4

temperature of the refrigerant.
The gaseous refrigerant is
led into a finned condenser,
which, as a consequence of the
heat exchange, condenses the
refrigerant under high pressure to
a liquid. The air emerging at the
condenser heats the environment.
The liquid refrigerant is led by
means of a variable injector valve
back to the evaporator where the
circuit begins again.
In heating mode, an air-cooled
chiller with heat pump functions
(HP-function) can take up heat
from the ambient air in the finned
condenser and give it off to the
operating medium. A reversing
valve switches the cooling circuit
function.
A return temperature dependent,
adaptive control, which ensures
the unit's operation and all of the
safety functions, is used to control
the cooling or heating. A potential-
free contact provides for remote
enabling.
The unit is designed for outdoor
installation. Under certain circum-
stances, it can also be used indoors.
The unit cooling circuit comprises
The equipment is shipped in sturdy
transport packaging. Immediately
check the equipment on delivery
and make note of any damage or
missing parts on the delivery note
and inform the forwarding agent
and your contractual partner.
Claims under guarantee made at
a later date will not be accepted.
System description
Transport and
packaging
In cooling mode, the unit (an air
to water chiller) takes heat out
of the operating medium to be
cooled, water or a mixture of
water and glycol, within a closed
medium circuit in the evaporator
(plate heat exchanger) and gives
it off to the closed cooling circuit.
As a consequence of the heat
exchange, the medium cools and
the refrigerant in the cooling circuit
vaporises under low pressure.
The gaseous refrigerant
enters an electric compressor
(scroll construction) which
increases the pressure and the
an evaporator, compressor, thermal
injection valve, condenser, con-
denser fan, fan control system and
high and low pressure controllers
Units with heat pump function also
have a reversing valve and a col-
lecting flask.
The medium circuit comprises
a circulation pump, expansion
vessel, safety valve and differential
pressure switch. A storage tank is
not mandatory.
Winter pressure controls, cabled
remote control, crank case heat-
ing, vibration dampers, heaters
for anti-freeze protection, external
medium storage tanks, glycol con-
centrate and a technical handover
are available as accessories.
Legend:
1 Circulation pump
2 Manual bleeder
3 Plate evaporator
4 Differential pressure switch
5 Diaphragm expansion vessel
6 Safety valve
7 Compressor
8 Pressure monitor
9 Schrader valve
10 Fin condenser
11 Condenser fan
12 Filter dryer
13 Schrader valve
14 Thermal expansion valve cooling
15 Sensor medium intake
16 Sensor medium outlet
17 Fan control sensor
Construction
KWL 130 - KWL 220
Cooling mode
1
3
4
5
6
7
14
2
16
15
98
17
8
9
11
10
13
12
5

Legend:
1 Circulation pump
2 Manual bleeder
3 Plate evaporator
4 Differential pressure switch
5 Diaphragm expansion vessel
6 Safety valve
7 Compressor
8 Pressure monitor
9 Schrader valve
10 Fin condenser
11 Condenser fan
12 Filter dryer
13 Schrader valve
14 Thermal expansion valve cooling
15 Sensor medium intake
16 Sensor medium outlet
17 Fan control sensor
Construction
1
1
3
3
4
4
5
5
6
6
7
7
17
17
8
8
9
9
14
14
11
11 11
10
1010
13
13
12
12
2
2
16
16
15
15
9
9
8
8
KWL 270 - KWL 370 Cooling mode
KWL 130 H - KWL 220 H Cooling and heating mode
KWL 270 H - KWL 370 H Cooling and heating mode
1
3
4
5
6
7
17
8
9
14
11 11
10 10
13
12
2
16
15
98
REMKO KWL (H)
6

System configuration
Operation
The system can be easily operated
via the fully automatic iChiLL
controller. If due to local conditions
programming via the internal
control can only be realised with
difficulty, the system can also be
controlled via a cabled remote
control (accessory) or an external,
potential-free, enabling contact
(standard).
A centralised fault contact, part of
the standard equipment, can be
used for the external signalling of
a fault.
If the letter "A" is shown in the display with a two-digit numeric
code, there is a fault in the chiller.
(see chapter on trouble-shooting and customer service).
!CAUTION
The unit is designed as a 2 conduc-
tor system.
The system has 2 medium pipes
(conductors: supply and return)
for cooling using a cold medium
(KWL) or heating using a warm
medium (units with HP function
KWL...H).
In combination with a correspond-
ing system, the output can be
transmitted to the room to be
cooled via the floor, the building
structure or by means of ceiling
cooling.
For each of the different systems,
a minimum flow volume and
a minimum medium volume must
be ensured for the plant.
Chiller
System configuration
Medium intake
Medium outlet
Indoor area 1
Outdoor area
Indoor area 2 Indoor area 3
Room temperature control Infrared remote control Cabled remote control
Chilled water -
appliance
Chilled water -
appliance
Chilled water -
appliance
Condensate drain
Condensate line (only
units with HP-function)
Condensate drain Condensate drain
Condensate collecting pipe
v
Methods of operation
Centralised
fault signal
iChiLL controller
Cable
remote control
Enabling contact
On/OFF Cooling/Heating
(e.g. building management
system)
(Standard equipment)
(Standard equipment)
(Accessories)
(Standard
equipment)
Help save on energy consump-
tion in stand-by mode! If the
device, system or component
is not in use, we recommend
disconnecting the power sup-
ply. Components with a safety
function is excluded from our
recommendation!
TIP
7

"▼and SET" keys together
Simultaneously pressing ▼and
"SET" enables a change of the
parameter level.
"▲and SET" keys together for
longer than 5 seconds
Simultaneous, extended press-
ing of ▲and "SET" enables
manual defrosting.
"Stand-By" icon
The LED indicates stand-by
mode.
"H / L Alarm"SFlb icons The LED
indicates the fault message high
pressure (H) or low pressure (L).
Compressor 1 icon
The LED indicates that com-
pressor 1 is in operation (illumi-
nated). The LED flashes if the
compressor is in safety mode.
Compressor 2 icon
The LED indicates that com-
pressor 2 is in operation (illumi-
nated). The LED flashes if the
compressor is in safety mode.
General alarm LED
This LED, together with the
code, indicates the respective
fault.
Defrosting status LED
(only units with HP-function)
The LED indicates that the
defrosting cycle is in operation
(illuminated) in heating mode at
the fin condenser. The control-
ler is calculating the necessary
defrosting time if the LED is
flashing.
Operating the controller
iChill adaptive
The controller has 3 modes:
1. Summer mode (cooling mode)
In cooling mode, the warmer me-
dium temperature is cooled to the
preset, cooler target temperature.
2. Transition mode (heating mode)
SFlb(only units with HP function):
In heating mode, the cooler me-
dium temperature is heated to the
preset, warmer target value.
3. Stand-By mode (Stand-by)
In the Stand-By mode, safety
equipment is active but no operat-
ing mode is set.
The controller is divided into a left
value display and a right
function display.
"M" key
With this key you reach the
function menu or can adjust
time and date.
"SET"
With this key the selection of a
target value or parameter can
take place.
"▼" key
Prolonged pressing (5 sec.)
allows switching between the
operating modes "Heating"
and "Stand-By" (units with HP
function).
By briefly pressing you can
change between medium
intake, outlet and condenser
temperature.
A value can also be reduced.
"▲" key
Prolonged pressing (5 sec.)
allows switching between the
operating modes "Cooling"
and "Stand-By".
By briefly pressing you can
change between outside air
temperature (accessory) and
defrost temperature. A value
can also be increased.
Heating mode LED
(only units with HP function)
The LED indicates the selected
heating mode.
Cooling mode LED
The LED indicates the selected
cooling mode.
Value display
The value display shows current
values.
Parameter display
The parameter display shows
current values or parameters.
"bar" icon
indicates the value in "bar" for
accessories like "winter pressure
controller".
"Time" icon
indicates a value in a time unit.
The "Pump" icon
lights up, if the circulating
pump is triggered.
"Fan" icon
The icon lights up, if the con-
denser fan is triggered.
"Flow!" icon
indicates a medium flow which
is too high or too low.
"Menu" icon
illuminates if you are on the
parameter level.
Heater for anti-freeze protec-
tion LED
The LED provides information
about the operating status for
the anti-freeze protection heat-
ing medium.
"°C" icon
indicates a temperature value.
+
+
Control panel of the iChiLL controller
REMKO KWL (H)
8

Key functions
/Key Activate and/or deactivate the unit with the key
by pressing it for longer than 5 seconds. On the display screen
the current display of the the return temperature is shown.
short-term
External enabling If a potential-free contect is used for the external enabling of the unit,
the controller shows "OFF" in the display and the display of the decimal
places blinks.
The unit has three modes: Stand-By mode, summer mode (cooling mode)
and transition mode (heating mode only for units with HP function). In
stand-by mode the stand-by display illuminates and the current values
are shown. All fault reports and anti-freeze protection resistors are active.
Attention: By changing the parameterisation a different functional
meaning of the display can be programmed!
Mode setting
External contact
Enable open
Display of the current operating values The normal display shows the current medium intake temperature and
the medium outlet temperature.
By pressing the key the condenser temperature (P63) can also be
read.
normal
display temperature medium intake
short-term
short-term
condenser
temperature.
short-term
temperature
medium outlet
normal
display
The potential-free contact has precedence over operation through the con-
troller. With the parameter CF 16 a negation of the contact can take place.
factory. Setting: CF 16 = 0 (open contact = controller on)
Possible change: CF 16 = 1 (closed contact = controller on)
External contact
Enable closed
min. 5 sec. min. 5 sec.
min. 5 sec.
HEATING MODE
only KWL...H
COOLING
MODE
KWL and
KWL...H
Cooling mode
Heating mode
Operating mode
Stand-By
min. 5 sec.
min. 5 sec.
min. 5 sec.
9

Target value input cooling mode
Programming target values
Adaptive cooling and heating function
The input of the target values for summer mode (cooling mode) and the transition mode (heating mode only
for units with HP function) takes place on the user level. The following diagrams provide simplified illustrations
of the operating principles.
Using the SET key, the set value can be displayed during stand-by or
cooling mode. To change the set value, press the SET key for approx. 5
seconds. The display begins to blink. With the or keys the value can
be adjusted within the limits defined at the factory (St 05 + St 06).
St 05 = 10.0 °C Minimum target value cooling mode
St 06 = 18.0 ℃ Maximum target value cooling mode
Factory setting = 12.5 ℃
min. 5 sec. short-term
value inputopen program
part
short-term
storing
If the temperature at the medium intake exceeds the target
value, the compressor switches on (A) and cooling capacity
is generated. If the calculated operating time of the com-
pressor falls below 3 minutes, an adjustment of the target
value is made. If the calculated operating time is longer
than 3 minutes, the current target value is kept. The me-
dium temperature lowers and the compressor is switched
off when the shut-off point is reached (B).
If the temperature at the medium intake exceeds the
target value, the compressor switches on (A) and heating
capacity is generated. If the calculated operating time of
the compressor falls below 3 minutes, an adjustment of
the target value is made. If the calculated operating time
is longer than 3 minutes, the current target value is kept.
The medium temperature increases and the compressor is
switched off when the shut-off point is reached (B).
Factory setting for target value
St01 = 12.5°C
Factory setting for target value
'St03 = 38.5°C
Adaptive target value
Adaptive target value
Adaptive hysteresis
Adaptive hysteresis
Factory setting for hysteresis
St02 = 3.0°C
Factory setting for hysteresis
St04 = 3.0°C
Compressor ON
Compressor ON
Compressor OFF
Compressor OFF
A
A
B
B
Temperature
Medium intake
through sensor
Pb1
Temperature
Medium intake
through sensor
Pb1
If the programmed target temperature within the system is reached quickly or only a small share of cooling or
heating capacity is accepted by the internal equipment, the operating time of the compressor decreases. An op-
erating time which is too short can have a negative long-term impact on the operation of the unit. The control-
ler continuously calculates the "Adaptive target value SEtr", so that a minimum operating time and minimum
stand-by time of the compressor of 3 minutes can be assured. In the process, the switch-on and shut-off point
of the compressor changes (hysteresis). The unit remains at this operating point until the cooling or heating
capacity accepted in the internal equipment has changed.
The adjustment of the target value has the consequence that the medium temperature can fluctuate beyond
the normal measure depending on the acceptance of the cooling or heating capacity within the system. If this
fluctuation should be decreased, the medium volume should be increased above the minimum medium volume,
e.g. through an additional storage tank.
Adaptive cooling function
Adaptive heating function
REMKO KWL (H)
10

Display of operating hours The operating times can be queried at the menu level. The clock display
appears.
C1Hr = Operating hours compressor 1 in hours x 10
C2Hr = Operating hours compressor 2 in hours x 10
PFHr = Operating hours circulation pump in hours x 10
normal
display circulation pump 70 operating hours
short-term 3 seconds
Querying operating statuses
Target value input heating mode
min. 5 sec. short-term
value inputopen program
part
short-term
storing
Using the SET key, the set value can be displayed during stand-by or
heating mode for units with HP function. To change the set value, press
the key for approx. 5 seconds. The display begins to blink. With the
or keys the value can be adjusted within the limits defined at the
factory (St 07 + St 08).
St 07 = 36 °C Minimum target value heating mode
St 08 = 43 °C Maximum target value heating mode
Factory setting = 38.5 ℃
Operating hours can be reset at the menu level by pressing of the key
for 3 seconds.
compressor 1
60 operating hours
Display of the adaptive target value During compressor operation the controller calculates the optimal oper-
ating time and stand-by time of the compressor. In order to query the
adaptive target value, please proceed as follows:
Query of the adaptive
target value
normal
display adaptive target value
short-term short-term
set target value
short-term
normal
display
11

Fault reset
In order to protect the unit from damage, the controller checks the compo-
nents which are relevant for the safety of the unit by means of sensors for
temperature, pressure, configuration, etc. Through the display screen of the
controller a coded error message is shown as a fault code. The cause can be
determined by the code (see table "Coded fault reports").
After pressing the Mcode you reach the menu program and the
"MENU" display is activated. The following selections can be made:
1. Display and resetting of current faults
2. Display and resetting of operating hours
3. Remaining time until defrosting phase (only units with HP function)
4. Display of the fault record
5. Deletion of the fault record
The menu program is automatically closed after 15 seconds if the
controller is not actuated.
Querying the fault reports
(See chapter on troubleshooting and customer service)
open ALrM
submenu
short-term short-term
fault code A01
rSt = resettable
no = not resettable
fault code A07
Fault record
The controller can process up to 50 faults. The most important messages
are shown directly on the display, such as high pressure, low pressure
or differential pressure switch fault. Other faults are displayed and stored
in code (max. 50 faults).
open program
part
short-term
short-term
open ALoG
submenu
fault code A07
short-term
Fault acknowledgement
If more than 50 faults are displayed, the oldest fault is deleted. Stored
faults can be reset using a password.
open program
part
short-term
short-term
open ALoG
submenu
fault code A07
short-term
password input
short-termshort-term
open ArSt
submenu
REMKO KWL (H)
12

Operating structure
> 5 sec.
< 2 sec.
< 2 sec.
> 5 sec.< 2 sec.
< 2 sec.
< 2 sec.
< 2 sec.
> 5 sec.
+
+
/
/
Open configuration
Value/parameter up
Open submenu/value
Close configuration
Value/parameter down
Close submenu
+
+
Standard display
Change target values
C/H target value change
Value change in cooling
between 10.0 and 18.0 and in
heating between 36.0 and 43.0
with the key /, save with
"SET".
Param.level 2 with password
All parameters
Input
Password
All parameters of
the Submenus:
St, CF, Sd, ES, CO,
Ar, dF
Display target values
Display target value cooling
Current target value in cooling mode
Display target value heating
Current target value in heating mode
Menu without password
Current fault list
currently pending, non-
resettable faults are displayed
with "no", resettable faults are
displayed with "rSt"; resetting
with the SET key.
Operating hours compressor 1
Value in hours, resettable after
maintenance, etc. by pressing the
SET key (5 sec.).
Parameter backup to
hotkey
Using a plugged-in hotkey
the current parameters of the
controller can be transferred to
the hotkey.
Operating hours compressor 2
Value in hours, resettable after
maintenance, etc. by pressing the
SET key (5 sec.).
Reset fault list
Faults are displayed in the
sequence n01 (oldest) to n50
(most recent). Through input of
the password under "ArSt" the
list can be reset.
Pump operating hours
Value in hours, resettable after
maintenance, etc. by pressing
the SET key (5 sec.).
Defrosting period
Value in min. and sec. until the
next defrosting interval
Param.level 1 without password
St 01 Target value cooling
St 02 Hysteresis cooling
St 03 Target value heating
St 04 Hysteresis heating
St 09 Output range
Pr2 Password
CF 16 ID 5 Configuration
CF 24 Pb 1 Shut-off
CF 25 Pb 2 Shut-off
CF 26 Pb 3 Shut-off
CF 27 Pb 4 Shut-off
CF 28 Unit active/operating mode
CF 29 Autom. changeover target value
CF 30 Hysteresis changeover
CF 31 Cooling / heating display icon
CF 32 °C/°F conversion
CF 37 Company version
Pr2 Password
Sd 01 Dyn. target value configuration
Sd 02 Shut-off dyn. target value C
Sd 03 Shut-off dyn. target value H
Sd 04 Outside temp. sensor target value C
Sd 05 Outside temp. sensor target value H
Sd 06 Outside temp. sensor hysteresis C
Sd 07 Outside temp. sensor Hysteresis H
Pr2 Password
ES 01 Switch-on time
ES 02 Shut-off time
ES 03 Activation Monday
ES 04 Activation Tuesday
ES 05 Activation Wednesday
ES 06 Activation Thursday
ES 07 Activation Friday
ES 08 Activation Saturday
ES 09 Activation Sunday
ES 10 Target value cooling
ES 11 Hysteresis cooling
ES 12 Target value heating
ES 13 Hysteresis heating
Pr2 Password
Ar 03 Target value anti-freeze protection fault C
Ar 04 Hysteresis anti-freeze protection fault C
Ar 08 Target value anti-freeze protection heating C
Ar 09 Target value anti-freeze protection heating H
Ar 10 Target value cooling W/W
Ar 11 Hysteresis cooling W/W
Ar 12 Hysteresis heating W/W
Ar 13 Config. anti-freeze protection heating
Ar 14 Config. Cooling
Ar 20 E-heating active/operating mode
Ar 21 Target value air temp. active
Ar 22 Hysteresis air temp. active htg
Ar 24 After-run time E-heating 2
Ar 25 Target value air temp. active compr.
Ar 26 Target value air temp. locked compr.
Ar 27 Target value anti-freeze protection fault H
Ar 28 Hysteresis anti-freeze protection fault H
Ar 29 Target value external pump W/W
Ar 30 Hysteresis external pump W/W
Ar 31 Pump active/operating mode
Ar 32 Pump active/operating mode
Pr2 Password
dF 02 Defrosting input parameter
dF 03 Target value defrosting start
dF 04 Target value defrosting end
dF 05 Min. operating time before
defrosting start
dF 06 Minimum defrosting time
dF 07 Maximum defrosting time
dF 10 Min.time defrosting interval
dF 11 Target value defrosting begin (df 10)
dF 12 Target value defrosting (dF 10)
dF 16 Active fault low temperature
dF 19 Target value forced defrost. begin
dF 20 Hysteresis forced defrost. begin
Pr2 Password
Pr2 Password
Pr2 Password
Pr2 Password
All open
parameters
Target values
Configuration
Dyn. target value
Energy-saving
cycle
Compressor
Fan
Anti-freeze
protection
Faults
Defrost
Display adaptive target value
Current, adaptive target value
Display of current values
Medium outlet display
Current value (supply)
Medium intake display
Current value (return)
Condenser display
Current value of condenser tem-
perature or pressure (with winter
pressure controller accessory)
13

Care and maintenance Shut-down
Temporary shut-down
1. Shut down the interior units
using the remote control.
2. Shut the unit off over the
internal control in the chiller (or
using the remote control).
3. Check the proportion
(percentage) of glycol.
4. Check the unit for visible signs
of damage and clean it as
described in the chapter "Care
and maintenance".
5. As much as possible, cover the
unit with a plastic foil to protect
it against the weather.
If only water and not a
mixture of water and glycol
is used, in regions subject
to freezing, water must be
drained from components
when these are at standstill.
The drained water volume
must be replaced when
components are put back into
operation!
!CAUTION
Permanent
shut-down
Ensure that equipment and
components are disposed of in
accordance with local regulations,
e.g. using certified firms and
recycling specialists or at collection
points.
REMKO GmbH & Co. KG or your
contractual partner will be pleased
to provide a list of certified firms
near you.
Regular care and observation
of some basic points will ensure
trouble-free operation and a long
service life.
Prior to performing any
work, ensure the equipment
is isolated from the voltage
supply and secured to prevent
accidental switch-on!
!CAUTION
Care
■ Ensure the unit is protected
against dirt, mould and other
deposits.
■ Clean the unit using a damp
cloth.
Do not use a jet of water.
■ Do not use any caustic, abra-
sive or solvent-based cleaning
products.
■ Clean the fins on the unit prior
to long shutdown periods.
Maintenance
■ We recommend
maintenance contract with an-
nual maintenance interval with
an appropriate specialist com-
pany.
This ensures the operational
reliability of your
at all times!
TIP
Type of task
Checks / maintenance / inspection
Commis- sioning Monthly Half-yearly Yearly
General •
Clean dirt traps • •
Check medium filling • •
Check circulation pump • •
Dirt / damage condenser • •
Check quality of the glycol • •
Measure voltage and current • •
Check direction of rotation • •
Check compressor • •
Check fan • •
Check refrigerant fill quantity • •
Check condensation drain • •
Test insulation • •
Sealing test for refrigerant circuit • • 1)
The law requires a leak test of
the cooling circuit with regard
to the quantity of cooling
medium. Inspection and docu-
mentation is to be carried out
by specialty technicians.
NOTE
1) see note
REMKO KWL (H)
14

The unit has been manufactured using state-of-the-art production methods and tested several times to ensure its
correct function. If malfunctions should occur, please check the unit as detailed in the list below. For installations with
an indoor unit and outdoor unit, observe the chapter "Troubleshooting and customer service" in both operating
manuals.
Please inform your dealer if the unit is still not working correctly after all the function checks have been performed.
Trouble-shooting and customer service
Malfunctions
Please note that this troubleshooting table continues on the next page
Fault Effect Possible cause Remedial measures
The unit
does not
start
Display is not illuminated
No power supply
Check the current connections at the
general supply terminals and the voltage
values.
Check breaker switches/fuses at the
secondary side of the supplemental
transformer.
Incorrect phase sequence.
The KA3 phase sequence relay
did not enable.
Replace current supply phase conductor at
the terminal strip on the switch panel.
The display is illuminated but
he unit does not start Unit in STAND BY See paragraph "Key functions" for the
activation of the system.
The display shows OFF No external enabling Check connection to terminals 2-3
(external enabling).
The unit does not start, the
compressor icon in the display
is flashing.
Delay time Wait out the delay time (max 360 sec.),
the compressor should then start.
The lower display flashes
and alternately shows an
alphanumeric code and the
temperature value.
One or more protective
devices have responded
Check which safety device has responded,
correct the cause of the fault and reset the
safety device (see "Fault display").
Compressor protection is
defective.
Does the compressor icon light
up and does the protection
have voltage?
Have specialist replace protection or
compressor.
The unit
is working
with
reduced
cooling/
heating
capacity
Thermal load was increased. Have structural modifications
been made? Maintain safety clearances.
Supply temperature too high. If the supply temperature is
approx. 5 ... 10 ℃? Reduce return temperature
Air in the medium circuit Are automatic bleeders
installed at the highest point?
Vent manually or install automatic
bleeders.
Condenser temperature too
high.
Are the fins clean and the
operating limits adhered to?
Clean fins, provide shade for the unit,
adhere to operating limits
Incorrect parameter setting. Check setting. Change setting.
Pulse mode because of too
little demand. Is the system oversized?
Increase medium flow with the installation
of a storage tank.
Medium
discharge
Leak in the lines or insulation
defective.
Are there leaks and are all of
the lines insulated? Seal and insulate.
Defrosting phase in heating
mode. Heating mode set? Normal operating status.
15

Fault Code Possible cause check Remedial measures
The unit
does not
start or
switches
itself
off.
Mains failure Does all other electrical
equipment function correctly?
Check voltage and if necessary
wait until turned on again.
Unit's breaker/mains switch
turned off Is voltage available to the unit? Switch on unit's breaker/ main circuit breaker
Wait time too short Is the compressor icon flashing? Plan for longer wait period.
Mains current has incorrect
direction of rotation.
Has the phase sequence relay
switched? Change direction of rotation.
Controller is not working
Is the icon for cooling mode,
heating mode or Stand-By mode
illuminated?
Energise and select operating
mode.
Return temperature or
parameter setting wrong Check setting. Change setting.
OFF No alarm / fault Check the closed
contact "external enabling"
Open / close
the contact being used.
P1 Medium intake sensor defective Check resistance at PB1 Replace defective sensor.
P2 Medium outlet sensor defective Check resistance at PB2 Replace defective sensor.
P3 Condenser sensor defective Check resistance at PB3 Replace defective sensor.
P4 Outdoor temperature sensor defective Check resistance at PB4 Replace defective sensor.
A01
High pressure fault Heat mode set? Set summer mode (cooling
mode).
High pressure fault
Are the fans turning?
Is the condenser's air intake free
of obstacles?
Have checked by a specialist.
A02 Low pressure fault Is the pressure in the cooling
circuit OK? Have checked by a specialist.
A05 Excessive temperature
condenser
Are the fans turning?
Is the condenser's air intake free
of obstacles?
Have checked by a specialist.
A06 Excess temperature condenser Have the operating temperatures
been exceeded? Shut down the system.
A07
Anti-freeze protection has
responded
Is the supply temperature greater
than or less than 4°C?
Increase return temperature,
Increase medium flow,
Set anti-freeze protection temp. .
Medium volume in the system
too low
Has the minimum medium
volume been complied with?
Comply with minimum medium
volume e.g. in the reservoir.
A08
Differential pressure switch /
Flow monitor
has responded
Are the following points
OK:
- Medium flow
- No air in the medium lines
- Capacity of the circulation pump
- Does the differential pressure
flow monitor switch
- Shut-off devices open
- Medium pressure to low
Have checked by a specialist.
A12 Fault defrosting Maximum defrosting duration
exceeded Have checked by a specialist.
A13 Compressor 1 maintenance Maintenance interval compressor
1 has been reached (500 op.hrs.)
After maintenance by a specialist reset
of the operating hours see chapter
"Querying the operating status".
A14 Compressor 2 maintenance Maintenance interval compressor
2 has been reached (500 op.hrs.)
After maintenance by a specialist reset
of the operating hours see chapter
"Querying the operating status".
A15 Circulation pump maintenance
Circulation pump maintenance
interval has been reached
(500 op.hrs.)
After maintenance by a specialist reset
of the operating hours see chapter
"Querying the operating status".
Malfunctions
REMKO KWL (H)
16

Fault indicated by code
Code Fault type Reset Intake type Cut-off
Intake value Automatic Manual Digital Analogue Software parameter Compressors Condenser fan Circulation pump Anti-freeze heating, cooling medium
P1 Temperature sensor medium intake defective PB1 x x x x x
P2 Temperature sensor medium outlet defective PB2 x x x x x
P3 Temperature sensor condenser defective PB3 x x x x x
P4 not possible PB4 x x x x x
A01 High pressure sensor HD1/HD2 x x x
A02 Low pressure sensor ND1 <2/hrs <2/hrs x x x
A03 Insufficient temperature medium intake PB1 x
A04 Insufficient temperature medium outlet PB2 x
A05 Excessive temperature condenser x x x
A06 Excess temperature condenser <2/hrs <2/hrs x x x
A07 Anti-freeze protection has responded x x x x
A08 Differential pressure switch has responded <2/hrs <2/hrs x x x x
A09 Excess temperature compressor 1 x
A10 Excess temperature compressor 2 x
A11 Excessive temperature condenser fan x
A12 Defrosting period exceeded x dF07
A13 Maintenance interval compressor 1 Co14 500 hrs x
A14 Maintenance interval compressor 2 Co15 500 hrs x
A15 Maintenance interval circulation pump Co16 500 hrs x
EE EEPROM defective x x x x x x
ACF1 Configuration error x x x x x x
ACF2 Configuration error x x x x x x
ACF3 Configuration error x x x x x x
ACF4 Configuration error x CF28 x x x x
AFr Power supply x x x x x x
Reset
1. Faults with automatic reset: The resetting of the alarm takes place automatically.
2. Faults with manual reset: The resetting of the alarm can only be carried out by a specialist after the fault has been corrected.
3. Faults with semi-manual reset: The reset is first carried out automatically, afterwards only a manual reset is possible by a specialist,
after the fault has been corrected.
Fault Code Possible cause check Remedial measures
The unit
does not
start or
switches
itself off.
ACF1 Configuration error The unit was configured with HP
function but without reversing valve.
Have specialist check regulation or
parameters.
ACF2 Configuration error
No configuration of the condenser
controller. Check parameters CF01
+ FA02
Have specialist check regulation or
parameters.
ACF3 Configuration error 2 digital inputs have the same function Have specialist check regulation or
parameters.
ACF4 Configuration error Digital input not configured.
Check parameters CF28 + CF07.
Have specialist check regulation or
parameters.
AFr Frequency alarm The mains frequency lies beyond the
the permissible range
Have the mains supply checked
by a specialty firm
EE EEprom controller error Does the controller operate properly? Have specialist check regulation or
parameters.
Malfunctions
17

Installation instructions for qualified personnel
■ Observe the manuals for the
cold water user (indoor units)
and chiller or heating system
when installing the entire
system.
■ The interior units user and the
chiller work independently. A
connection between the two is
not necessary.
■ Transport the unit in its original
packaging as close as possible
to the installation location.
This avoids transportation
damage.
■ The units may only be moved
as installed (upright) using
appropriate transport gear
(Figure 1).
Secure against tipping!
■ The unit must be kept upright
when transporting to a higher
elevation (Figure 2).
■ Check that the packaged
contents are complete and
inspect the unit for any visible
signs of transportation damage.
Report any damage
immediately to your contracting
party and the shipping
company.
■ Select an installation location
which allows air to freely
flow through the intake and
outlet. See section "Minimum
clearances".
■ Do not install the unit in the
immediate vicinity of devices
with intensive thermal radiation.
Installation near thermal radiation
reduces the unit output.
■ Lift the unit only at intended
lifting points. Never stress the
medium or refrigerant piping.
■ The medium connection lines,
valves and connections must
be insulated against vapour
diffusion. If necessary, also
insulate the condensate line
(only units with HP-function).
In dual systems with cooling
and heating modes, the
requirements of the current
Energy-Savings-Ordinance
(EnEV) are to be complied with.
■ Seal off open lines against dirt
and never kink or crimp the
lines.
■ Avoid unnecessary bending.
■ Establish all electrical
connections connections in
accordance with the relevant
DIN- and VDE standards.
■ Always fasten electric wiring
properly to the terminals,
otherwise there is a risk of fire.
■ Comply with all regulations
governing structural and
building requirements and
conditions with regard to the
installation site.
■ In the selection of the
installation site, pay attention
to the site itself and to any
possible acoustic reflection from
surrounding units.
■ To avoid the transmission of
vibrations to the installation
site, the units must be installed
on vibration absorbing material
or on vibration decoupled
foundations.
In doing so, make sure that
the lines are also vibration
decoupled.
■ If the installation site must
fulfil special sound emission
requirements, these must
be realised on-site when
appropriate adjustments can be
made.
In these cases, please consult an
appropriate acoustics expert.
Important information
before installing
2 Correct way to lift
Lifting point
1 Correct way to move
REMKO KWL (H)
18

Wind
3 Windbreak
20 cm
Snow
4 Minimum clearance to snow
Wall openings
■ We recommend that the inside
of the opening be padded or
lined for example with a PVC
pipe to prevent damage to the
lines.
■ After installation, the wall
opening should be closed off
with a suitable sealant. Do not
use materials containing cement
or lime!
Installation material
The unit is fastened on vibration
dampers (accessories) to the floor
by means of bolts. The carrying
capacity of the console and the
wall must be taken into account
when fastening to the wall.
Selection of the installation
location
The unit is designed for horizontal
installation on a base in outdoor
areas. The installation site must
be level, flat and firm. The unit
should also be secured to prevent
toppling.
The unit can be installed outside as
well as inside a building.
In the case of outdoor installation,
please follow the instructions given
below to protect the unit against
the weather.
Rain
The unit should be at least 10 cm
off the ground when mounted on
the roof or ground. when mounted
on the roof or ground.
For cooling and heating units (only
HP-function) elevated installation
increases the generated heat
capacity.
Sun
The finned condenser gives off
heat in cooling mode.
Exposure to sunlight further
increases the temperature of the
fins and reduces the heat released
by the finned heat exchanger.
The unit should, whenever
possible, be installed on the north
side of the building.
If necessary, take measures
to provide sufficient shade
(responsibility of customer).
This can be accomplished with
a small roof covering.
However, the discharging warm air
flow may not be affected by the
measures.
Wind
If the unit is being installed where
it is windy, care must be taken that
the discharged warm air is carried
off in the prevailing wind direction.
If this is not possible, it may be
necessary to install a windbreak
on-site (Figure 3).
Ensure that the windbreak does
not adversely affect the air intake
to the unit.
Snow
The unit should be wall-mounted
in areas of heavy snowfall.
Installation should then be at
least 20 cm above the expected
level of snow to prevent snow
from getting into the outdoor unit
(Figure 4).
Installation inside buildings
■ Ensure that heat can dissipate
adequately when placing the
outdoor unit in cellars, attics,
adjoining rooms or halls (figure 5).
■ Install an additional fan with
the same air flow as that
of the outdoor unit being
installed in the room which
can compensate any additional
pressure losses with ventilation
ducts (Figure 5, Page 20).
■ Ensure a continuous and
unobstructed air flow from
outside, preferably using
sufficiently large air openings
(Figure 5, Page 20).
Cooling or heating perform-
ance changes as a conse-
quence of the ambient condi-
tions influenced by rain, sun,
wind, and snow.
NOTE
19

KWL 130(H) -
220(H)
KWL 270(H) -
320(H) KWL 370 (H)
A 350 350 800
B 1500 800 800
C 600 800 800
D 350 800 800
E 500 1800 1800
Warm air Cold
Fresh air
Light
well
Chiller
Warm air
Light
well
Additional
Fan
5 Installation inside buildings (cooling mode)
Minimum clearances
E
C
B
A
D
E
C
B
AD
E
C
B
A
D
KWL 130(H) - 220(H) KWL 270(H) - 320(H) KWL 370 (H)
Minimum clearances
The following illustration indicates
the minimum clearances for trou-
ble-free operation of the system.
These protection zones serve to
ensure unrestricted air intake and
discharge, as well as providing suf-
ficient room for performing main-
tenance and repairs and prevent-
ing the unit from being damaged.
■ Comply with any regulations
and conditions affecting the
structure of the building. If
necessary, use sound reducing
material.
All values in mm
REMKO KWL (H)
20