Daikin Hydrocube EWLP012KAW1N User manual

OPERATION MANUAL
EWLP012KAW1N
EWLP020KAW1N
EWLP026KAW1N
EWLP030KAW1N
EWLP040KAW1N
EWLP055KAW1N
EWLP065KAW1N
Condenserless water-cooled water chillers

Operation manual
1
EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
C
ONTENTS
Page
Introduction ....................................................................................... 1
Technical specifications ............................................................................. 1
Electrical specifications ............................................................................. 2
Description ........................................................................................ 2
Function of the main components.............................................................. 3
Safety devices............................................................................................ 3
Internal wiring - Parts table........................................................................ 4
Before operation................................................................................ 5
Checks before initial start-up ..................................................................... 5
Water supply.............................................................................................. 5
Power supply connection and crankcase heating...................................... 5
General recommendations ........................................................................ 5
Operation .......................................................................................... 5
Digital controller......................................................................................... 5
Working with the EWLP units .................................................................... 6
Advanced features of the digital controller................................................. 8
Troubleshooting............................................................................... 11
Maintenance.................................................................................... 12
Maintenance activities ............................................................................. 12
Disposal requirements............................................................................. 12
I
NTRODUCTION
This operation manual concerns condenserless water-cooled water
chillers of the Daikin EWLP-KA series. These units are provided for
indoor installation and used for cooling applications. The EWLP units
can be combined with Daikin fan coil units or air handling units for air
conditioning purposes. They can also be used for supplying water for
process cooling.
This manual has been prepared to ensure adequate operation and
maintenance of the unit. It will tell you how to use the unit properly
and will provide help if problems occur. The unit is equipped with
safety devices, but they will not necessarily prevent all problems
caused by improper operation or inadequate maintenance.
In case of persisting problems contact your local Daikin Dealer.
Technical specifications
(1)
EWLP012KAW1N EWLP040KAW1N
EWLP020KAW1N EWLP055KAW1N
EWLP026KAW1N EWLP065KAW1N
EWLP030KAW1N
Condenserless water-cooled water chillers
Operation manual
READ THIS MANUAL ATTENTIVELY BEFORE STARTING
UP THE UNIT. DO NOT THROW THIS MANUAL AWAY.
KEEP IT IN YOUR FILES FOR FUTURE REFERENCE.
Read the chapter "Overview of the user parameters" on
page 8 before changing the parameters.
Before starting up the unit for the first time, make sure that
it has been properly installed. It is therefore necessary to
carefully read the installation manual supplied with the unit
and the recommendations listed in "Before starting".
(1) Refer to the engineering data book for the complete list of specifications.
General EWLP 012 020 026 030
Dimensions HxWxD
(mm)
600x600x600
Machine weight
(kg)
104 138 144 149
Connections
•condenser
discharge
connection
(copper)
(mm)
12.7 flare 19.1 flare 19.1 flare 19.1 flare
•condenser liquid
connection
(copper)
(mm)
9.52 flare 12.7 flare 12.7 flare 12.7 flare
General EWLP 040 055 065
Dimensions HxWxD
(mm)
600x600x1200
Machine weight
(kg)
252 265 274
Connections
•condenser
discharge
connection
(copper)
(mm)
2x 19.1 flare 2x 19.1 flare 2x 19.1 flare
•condenser liquid
connection
(copper)
(mm)
2x 12.7 flare 2x 12.7 flare 2x 12.7 flare
Compressor EWLP 012 020 026 030
Model JT140BF-YE JT212DA-YE JT300DA-YE JT335DA-YE
Speed
(rpm)
2900
Oil type FVC68D
Oil charge volume
(l)
1.5 2.7 2.7 2.7
Refrigerant type R407C
Evaporator
Type brased plate heat exchanger
Min. water volume
(l)
62.1 103 134 155
Water flow range
(l/min)
17~69 29~115 38~153 45~179
Condenser
refer to engeneering specifications as published by the supplier of your
remote condenser
Compressor EWLP 040 055 065
Model 2x JT212DA-YE 2x JT300DA-YE 2x JT335DA-YE
Speed
(rpm)
2900
Oil type FVC68D
Oil charge volume
(l)
2x 2.7 2x 2.7 2x 2.7
Refrigerant type R407C
Evaporator
Type brased plate heat exchanger
Min. water volume
(l)
205 268 311
Water flow range
(l/min)
57~229 77~307 89~359
Condenser
refer to engeneering specifications as published by the supplier of your
remote condenser

EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
2
Electrical specifications
(1)
A
D
ESCRIPTION
The EWLP condenserless water-cooled water chillers are available in 7 standard sizes.
Figure: Main components
(1) Refer to the engineering data book for the complete list of specifications.
Model EWLP 012 020 026 030
Power supply
•Phase 3N~
•Frequency
(Hz)
50
•Voltage
(V)
400
•Voltage tolerance
(%)
±10
•Recommended fuses (aM)
3x 16 3x 20 3x 25 3x 32
Compressor
•Phase 3~
•Frequency
(Hz)
50
•Voltage
(V)
400
•Nominal running current (A) 7.4 11.6 14.7 16.8
Control
•Phase 1~
•Frequency
(Hz)
50
•Voltage
(V)
230
•Recommended fuses (aM)
factory installed
Model EWLP 040 055 065
Power supply
•Phase 3N~
•Frequency
(Hz)
50
•Voltage
(V)
400
•Voltage tolerance
(%)
±10
•Recommended fuses (aM)
3x 40 3x 50 3x 50
Compressor
•Phase 3~
•Frequency
(Hz)
50
•Voltage
(V)
400
•Nominal running current (A) 11.6 14.7 16.8
Control
•Phase 1~
•Frequency
(Hz)
50
•Voltage
(V)
230
•Recommended fuses (aM)
factory installed
13 14 15 16
17
500
500
500
5
10
2
3
14
10
11 11
9
2
3
4
3
1
1
759
8661818
12 12
7
8
500
500
500
500
500
EWLP012~030KAW1N
EWLP040~065KAW1N
1 Compressor
2 Evaporator
3 Accumulator
4 Switchbox
5 Chilled water in
6 Chilled water out
7 Discharge stop valve
8 Liquid stop valve
9 Evaporator entering water temperature sensor
10 Freeze up sensor
11 Digital display controller
12 Power supply intake
13 Ball valve (field installed)
14 Water filter (field installed)
15 Air purge valve (field installed)
16 T-joint for air purge (field installed)
17 Flow switch (with T-joint) (field installed)
18 Main switch
Required space around the unit for service

Operation manual
3
EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Function of the main components
Figure: Functional diagram
As the refrigerant circulates through the unit, changes in its state or
condition occur. These changes are caused by the following main
components:
■ Compressor
The compressor (M*C) acts as a pump and circulates the
refrigerant in the refrigeration circuit. It compresses the
refrigerant vapour coming from the evaporator to a pressure at
which it can easily be liquified in the condenser.
■ Filter
The filter installed behind the condenser removes small particles
from the refrigerant to prevent blockage of the tubes.
■ Expansion valve
The liquid refrigerant coming from the condenser enters the
evaporator via an expansion valve. The expansion valve brings
the liquid refrigerant to a pressure at which it can easily be
evaporated in the evaporator.
■ Evaporator
The main function of the evaporator is to take heat from the
water that flows through it. This is done by turning the liquid
refrigerant, coming from the condenser, into gaseous
refrigerant.
■ Water in/outlet connections
The water inlet and outlet connection allow an easy connection
of the unit to the water circuit of the air handling unit or industrial
equipment.
Safety devices
The unit is equipped with General safety devices : shut down all
circuits and stop the whole unit.
■ I/O PCB (A2P) (input/output)
The I/O PCB (A2P) contains a reverse phase protector.
The reverse phase protector detects if the 3 phases of the power
supply are connected correctly. If a phase is not connected or if
2 phases are inverted, the unit can not start up.
■ Overcurrent relay
The overcurrent relay (K*S) is located in the switch box of the
unit and protects the compressor motor in case of overload,
phase failure or too low voltage.The relay is factory-set and may
not be adjusted. When activated, the overcurrent relay has to be
reset in the switch box and the controller needs to be reset
manually.
■ High-pressure switch
The high-pressure switch (S*HP) is installed on the discharge
pipe of the unit and measures the condenser pressure (pressure
at the outlet of the compressor). When the pressure is too high,
the pressure switch is activated and the circuit stops.
When activated, it resets automatically, but the controller needs
to be reset manually.
1 Compressor 9 Liquid stop valve
2 Filter 10 Discharge stop valve
3 Expansion valve 11 Accumulator
4 Evaporator 12 Flow switch (delivered with the unit, installed in the field)
5 Evaporator water outlet 13 Ball valve (delivered with the unit, installed in the field)
6 Evaporator water inlet 14 Water filter (delivered with the unit, installed in the field)
7 Sight glass 15 Air purge valve (delivered with the unit, installed in the field)
8 Liquid solenoid valve Field piping
S4LP
S1HP
R3T
Q1D
HP
LP
M1C
R4T
1
5
64
2
10111513
13
14
3 7
S5LP
S2HP
Q2D
HP
LP
M2C
12
R3T
R4T S4LP
HP
LP
M1C S1HP
Q1D
8 9
EWLP012~030KAW1N
EWLP040~065KAW1N

EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
4
■ Low pressure switch
The low-pressure switch (S*LP) is installed on the suction pipe
of the unit and measures the evaporator pressure (pressure at
the intlet of the compressor). When the pressure is too low, the
pressure switch is activated and the circuit stops.
When activated, it resets automatically, but the controller needs
to be reset manually.
■ Discharge thermal protector
The discharge thermal protector (Q*D) is activated when the
temperature of the refrigerant leaving the compressor becomes
too high. When the temperature returns to normal, the protector
resets automatically, but the controller needs to be reset
manually.
■ Freeze up sensor
The outlet water temperature sensor (R4T) measures the
temperature of the water at the water heat exchanger outlet. The
protection device shuts down the circuit when the temperature of
the chilled water becomes too low in order to prevent freezing of
the water during operation.
When the outlet water temperature returns to normal, the
protector resets automatically, but the controller needs to be
reset manually.
■ Fuse for control circuit (F1U)
The fuse for control circuit protects cables of control circuit and
controller components in case of short circuit.
■ Fuse for control circuit (F4)
The fuse for control circuit protects cables of control circuit in
case of short circuit.
■ Fuse for digital controller (F3U)
The fuse protects cables of digital controller and digital controller
in case of short circuit.
■ Flow switch (delivered with the unit, installed in the field)
The flow switch measures the flow in the water circuit. In case
the flow does not reach the minimum allowed water flow, the unit
will be shut down.
■ Ball valve (delivered with the unit, installed in the field)
A ball valve is installed in front of and behind the water filter to
allow filter cleaning without having to drain the water circuit.
■ Water filter (delivered with the unit, installed in the field)
The filter installed in front of the unit removes dirt from the water
to prevent damage to the unit or blockage of the evaporator or
condenser.The water filter should be cleaned on a regular base.
■ Air purge valve (delivered with the unit, installed in the field)
Remaining air in the chiller water system will be automatically
removed via the air purge valve.
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit. The
abbreviations used are listed below:
A1P .................... PCB: controller PCB
A2P .................... PCB: I/O PCB (input/output)
A3P ............ **.... PCB: Address card for BMS
(1)
A5P,A6P..... **.... PCB: Softstarter for circuit 1, circuit 2
(1)
A7P ............ **.... PCB: Remote user interface(1)
E1H,E2H............ Crankcase heater circuit 1, circuit 2
F1,F2,F3 .... #..... Main fuses for the unit(2)
F4............... * ..... Fuse I/O PCB
F5............... ##... Surge proof fuse (optional for BMS)
F6............... #..... Fuse for pumpcontactor(2)
F1U .................... Fuse I/O PCB
F3U .................... Fuse for controller PCB
H3P............ * ..... Indication lamp alarm(2)
H4P............ * ..... Indication lamp operation compressor 1(2)
H5P............ * ..... Indication lamp operation compressor 2(2)
H6P............ * ..... Indication lamp general operation(2)
K1F,K2F ..... #..... Auxiliary contactor for fan motors
K1M,K2M ........... Compressor contactor circuit 1, circuit 2
K4S,K5S ............ Overcurrent relay circuit 1, circuit 2
K6S ............ * ..... Overcurrent relay pump(2)
K1P ............ * ..... Pumpcontactor
M1C,M2C........... Compressor motor circuit 1, circuit 2
PE ...................... Main earth terminal
Q1D,Q2D ........... Discharge thermal protector circuit 1, circuit 2
R3T .................... Evaporator inlet water temperature sensor
R4T .................... Evaporator outlet water temperature sensor
R5T .................... Condenser inlet temperature sensor
S1HP,S2HP........ High pressure switch circuit 1, circuit 2
S4LP,S5LP......... Low pressure switch circuit 1, circuit 2
S7S ............ * ..... Switch for remote cooling/heating selection(2)
S9S ............ * ..... Switch for remote start/stop(2)
S10L................... Flow switch
S12M.................. Main isolator switch
TR1 .................... Transfo 230 V ➞ 24 V for supply of controller PCB
TR2 .................... Transfo 230 V ➞ 24 V for supply of I/O PCB (A2P)
Y3R.................... Reversingvalve
Y1S, Y2S............ Liquid solenoid valve
X1~3,X1~82A..... Connectors
(1) optional
(2) field supply
Not included with standard unit
Not possible as option Possible as option
Obligatory # ##
Not obligatory * **

Operation manual
5EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
BEFORE OPERATION
Checks before initial start-up
After the installation of the unit, check the following before switching
on the circuit breaker:
1Field wiring
Make sure that the field wiring between the local supply panel
and the unit has been carried out according to the instructions
described in the installation manual, according to the wiring
diagrams and according to European and national regulations.
2Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the installation manual.
Make sure that neither a fuse nor a protection device has been
bypassed.
3Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
4Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
5Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
6Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
7Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
8Oil leak
Check the compressor on oil leakage. If there is an oil leak, call
your local dealer.
9Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage should correspond to the voltage on the identification
label of the unit.
Water supply
Fill the water piping, taking into account the minimum water volume
required by the unit. Refer to the chapter "Water charge, flow and
quality" in the installation manual.
Make sure that the water is of the quality as mentioned in the
installation manual.
Purge the air at the high points of the system and check the operation
of the circulation pump and the flow switch.
Power supply connection and crankcase heating
To switch on the crankcase heater proceed as follows:
1Switch on the circuit breaker on the unit. Make sure that the unit
is “OFF” on the controller.
2The crankcase heater is switched on automatically.
3Check the supply voltage on the supply terminals L1, L2, L3, (N)
by means of a voltmeter. The voltage should correspond to the
voltage indicated on the identification label of the unit. If the volt-
meter reads values which are not within the ranges specified in
the technical data, check the field wiring and replace the supply
cables if necessary.
4Check the LED on the reverse phase protector. If it lights up, the
phase order is correct. If not, switch off the circuit breaker and
call a licensed electrician to connect the wires of the power sup-
ply cable in the correct phase order.
After six hours, the unit is ready for operation.
General recommendations
Before switching on the unit, read following recommendations:
1When the complete installation and all necessary settings have
been carried out, close all front panels of the unit.
2The service panel of the switch box may only be opened by a
licensed electrician for maintenance purposes.
OPERATION
The EWLP units are equipped with a digital controller offering a user-
friendly way to set up, use and maintain the unit.
This part of the manual has a task-oriented, modular structure. Apart
from the first section, which gives a brief description of the controller
itself, each section or subsection deals with a specific task you can
perform with the unit.
Digital controller
User interface
The digital controller consists of a numeric display, four labelled keys
which you can press and four LEDs providing extra user information.
Figure: Digital controller
Make sure that the circuit breaker on the power supply
panel of the unit is switched off.
■Use a good thread sealant for the sealing of the
connections. The sealing must be able to withstand
the pressures and temperatures of the system, it must
also be resistant to the used glycol in the water.
■The exterior of the water pipes must be adequately
protected against corrosion.
In order to avoid compressor damage, it is necessary to
switch on the crankcase heater for at least six hours before
starting the compressor after a long period of standstill.
comp
x
100
clear
PRG
mute
SEL

EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
6
Keys provided on the controller:
Each key, except for the lower left key, combines two functions: E/
O, A/Yand I/Z. The function carried out when the user
presses one of these keys depends on the status of the controller
and the unit at that specific moment.
LEDs provided on the controller:
Direct and user parameters
The digital controller provides direct and user parameters. The direct
parameters are important for the everyday usage of the unit, e.g. to
adjust the temperature setpoint or to consult actual operational
information. The user parameters on the contrary provide advanced
features such as adjusting time delays or disabling the buzzer.
Each parameter is defined by a code and a value. For example, the
parameter used to select local or remote on/off control has code h7
and value 1or 0.
Working with the EWLP units
This chapter deals with the everyday usage of the EWLP units. Here,
you will learn how to perform routine tasks, such as:
■switching the unit on and off,
■adjusting the temperature setpoint,
■consulting actual operational information,
■resetting alarms,
■resetting warnings.
Switching the EWLP unit on
To switch the EWLP unit on, proceed as follows:
1When the on/off digital input user parameter h7 is set to 0(=No),
press the Ikey for approximately 5 seconds to switch the unit
on in cooling mode (inlet water temperature control of
evaporator).
When the on/off digital input user parameter h7 is set to
1(=Yes), you can also switch the unit on using the remote on/off
switch (installed by the customer).
In both cases an initialization cycle is started and the TLED
starts blinking. The ILED, lights up when the unit is switched
on. Once all the timers have reached zero, the unit starts up and
the TLED lights up permanently. The numeric display shows
the actual inlet water temperature of the evaporator.
2When the unit is started up for the first time, or when the unit has
been out of operation for a longer period, it is recommended to
go through the following checklist.
Abnormal noise and vibrations
Make sure the unit does not produce any abnormal noises or
vibrations: check the fixations and piping. If the compressor
makes any abnormal noises, this may also be caused by an
overcharge of refrigerant.
Working pressure
It is important to check the high and low pressure of the
refrigerant circuit to ensure the proper operation of the unit and
to guarantee that the rated output will be obtained.
For reference, the average saturated temperature of R407C in
relation to the pressure readout can be found in "Annex I" on
page 13.
3If the unit does not start after a few minutes, consult the actual
operational information available in the list of direct parameters.
Also refer to the chapter "Troubleshooting" on page 11.
Switching the EWLP unit off
To switch the EWLP unit off, proceed as follows:
1When the on/off digital input user parameter h7 is set to 0(=No)
and the unit is on, press the Ikey for approximately 5 seconds
to switch the unit off.
The ILED and the TLED are extinguished.
2When the on/off digital input user parameter h7 is set to
1(=Yes), switch the unit off using the remote on/off switch.
The ILED and the TLED are extinguished.
Ekey, to enter the scroll list of user parameters, to confirm a
parameter modification and to return to normal operation.
Okey, to de-activate the buzzer in the case of an alarm.
Akey, to scroll through the list of direct or user parameters or to
raise a setting.
Ykey, has no effect on EWLP units.
Rkey, to enter the scroll list of direct parameters or to switch
between a parameter's code and its value.
Ikey, to start the unit in cooling mode or to switch the unit off when
cooling mode is active.
Zkey, to scroll through the list of direct or user parameters or to
lower a setting.
T
LEDs, indicates the status of the compressor 1 (left LED) and
compressor 2 (right LED). The TLEDs do not light up when the
compressor is not active, blinks when the compressor cannot start
up although extra load is requested (e.g. timer active) and lights
up permanently when the compressor is active.
YLED, is not used.
ILED, indicates that cooling mode is active.
ULED, indicates that the value on the numeric display should be
multiplied by 100.
NOTE Temperature readout tolerance: ±1°C.
Legibility of the numeric display may decrease in direct
sunlight.
The pressures measured will vary between a maximum
and minimum value, depending on the water and outdoor
temperatures (at the moment of measurement).
NOTE In case of remote on/off control (h7=1), it is recom-
mended to install an on/off switch near the unit in
series with the remote switch. The unit can then be
switched off from either place.

Operation manual
7EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Adjusting the cooling temperature setpoint
The EWLP units enable definition and modification of the cooling
temperature setpoint. The default, limit and step values for the
cooling setpoint are:
■Default value 12.0°C
■Limit values 7.0to 25.0°C
■Step value 0.1°C
To adjust the cooling temperature setpoint, proceed as follows:
1Press the Rkey for approximately 5 seconds to enter the list of
direct parameters.
The direct parameter code r1 defining the cooling temperature
setpoint appears on the display.
2Press the Rkey.
The actual cooling temperature setpoint appears on the display.
3Press the Aor Zkey to raise, respectively lower the
temperature setting.
4Press the Rkey to return to parameter code r1.
5To save the adjusted temperature setpoint, press the Ekey. To
cancel the modification wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of direct parameters and returns to its normal operation,
displaying the inlet water temperature.
In the second case the display starts flashing. Approximately
40 seconds later, the controller leaves the list of direct
parameters without saving the modified parameter. The inlet
water temperature reappears on the display.
Consulting actual operational information
The actual operational information that can be consulted in the list of
direct parameters consists of:
■r6 : outlet water temperature evaporator,
■r8 : ambient temperature,
■c9 : total running hours of the compressor1,
■ca : total running hours of the compressor2,
■cv : total running hours of the pump.
To consult the actual operational information, proceed as follows:
1Press the Rkey for approximately 5 seconds to enter the list of
direct parameters.
The direct parameter code r1 defining the cooling temperature
setpoint appears on the display.
2Depending on the information to be consulted, select parameter
code r6, r8, c9, ca or cv using the Aand/or Zkey.
3Press the Rkey to consult the actual value of the selected
parameter.
4Press the Rkey to return to the parameter codes.
5To consult other actual operational information, repeat from
instruction 2 onwards.
6To return to normal operation, press the Ekey or wait
approximately 40 seconds.
In the first case, the controller immediately leaves the list of
direct parameters and returns to normal operation displaying the
inlet water temperature.
In the second case, the display will start flashing. Approximately
40 seconds later, the controller leaves the list of direct para-
meters. The inlet water temperature reappears on the display.
Resetting alarms
When an alarm is detected, the following happens:
■the buzzer is activated (if enabled by means of user parameter p4),
■the alarm relay is energized,
■the display starts flashing, alternately showing the alarm code
and the inlet water temperature.
The following alarm codes may appear on the screen:
■a1: indicates an anti-freeze alarm,
■e1:indicates that the NTC probe used to measure the
evaporator inlet water temperature is defective,
■e2:indicates that the NTC probe used to measure the outlet
water temperature is defective,
■e3:indicates that the NTC probe used to measure the ambient
temperature is defective,
■ee,ep:indicates that the EEPROM on the controller PCB inside the
unit is defective,
■ei,e0:indicates that the supply voltage is exceedingly low (ei) or
exceedingly high (e0). In these cases contact a licensed
electrician,
■el:indicates that the power supply has a "remarkable noise". In
this case contact a licensed electrician,
■fl:indicates that there was no water flow either during the
period of 15 seconds after the pump was started or for 5
seconds while the compressor is active,
■h1:indicates that a high pressure switch, the discharge thermal
protection or the overcurrent protection of the compressor
motor is activated,
■l1: indicates that the low pressure switch is activated.
To reset an alarm, proceed as follows:
1Press the Okey to acknowledge the alarm.
The buzzer is de-activated.
2Find the cause of shutdown and correct.
Refer to the chapter "Troubleshooting" on page 11.
3If the alarm codes a1, fl, h1 or l1 appear on the display, reset
the alarm manually by pressing the Aand Zkey
simultaneously for approximately 5 seconds.
In all other cases the alarm is reset automatically.
Once the alarm is reset, the error code no longer appears on the
display. The controller continues its normal operation, displaying
the inlet water temperature.
NOTE By pressing any button while the display is flashing
and cancelling of all changes is in progress, the can-
celling process is stopped, the display stops flashing
and the user can continue to change the settings.
NOTE To reset the timers c9, ca and cv, refer to chapter
"Resetting warnings" on page 8.
NOTE If the alarm codes fl and h1 are flashing alternately,
the alarm is most probably caused by the reverse
phase protector or by the fuse for control circuit (F4)
that is blown.

EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
8
Resetting warnings
During normal operation, the display of the controller may start
flashing, alternately showing the inlet water temperature and the
following warning code:
■n1:indicates that the compressor1 requires maintenance: the
total running hours of the compressor1 (direct parameter c9)
has exceeded the setting of the timer threshold for
maintenance warning (user parameter cb).
■n2:indicates that the compressor2 requires maintenance: the
total running hours of the compressor2 (direct parameter ca)
has exceeded the setting of the timer threshold for
maintenance warning (user parameter cb).
To reset the maintenance warning n1 or n2, proceed as follows:
1Enter the list of direct parameters by pressing the Rkey for
approximately 5 seconds.
The parameter code r1 appears on the display.
2Select parameter code c9 or ca using the Aand/or Zkey.
3Press the Rkey to switch to the parameter value.
4Press the Aand Zkeys simultaneously for approximately
5 seconds.
The timer's value becomes 0.
5Press the Rkey to return to parameter code c9 or ca.
6Press the Ekey to return to normal operation.
Advanced features of the digital controller
This chapter gives an overview of the direct parameters and user
parameters provided by the controller. In the following chapter, you
will learn how you can set up and configure the EWLP unit using
these parameters.
Overview of the direct parameters
The list of direct parameters is accessible by pressing the Rkey for
approximately 5 seconds.
When scrolling through the list of direct parameters using the Aand/
or Zkey, the parameters appear in the following order:
■r1: to define the cooling temperature setpoint,
■r2: to define the cooling temperature difference,
■r6: to check the evaporator outlet water temperature,
■r8: to check the ambient temperature
■c9: to check the total running hours of the compressor1,
■ca: to check the total running hours of the compressor2,
■cv: to check the total running hours of the pump.
Overview of the user parameters
The list of user parameters is only accessible by means of the user
password. When scrolling through the list of parameters using the A
and/or Zkey, you see the direct parameters and user parameters.
The user parameters appear in the following order:
■:d: to define the measurement unit (°C or °F),
■c7:to define the time delay between the pump startup and the
compressor startup,
■c8:to define the time delay between the unit shutdown and the
pump shutdown,
■cb: to define the time threshold for maintenance warning,
■p4:to disable the buzzer or to define the activation period of the
buzzer in case of an alarm,
■h7: to activate or de-activate the remote on/off control,
■h9: to lock or unlock the controller keyboard,
■ha: to define the unit's serial address,
■h8,hb,c6: not used.
Tasks carried out using direct parameters
Entering the list of direct parameters
1Press the Rkey for approximately 5 seconds.
The controller enters the list of direct parameters, displaying
parameter code r1.
Defining the cooling temperature difference
To control the cooling load, the unit with 1 compressor is equipped
with a single-step thermostat. The unit with 2 compressors is
equipped with a two-step thermostat. The thermostat's "cooling
temperature difference" can be modified by means of direct
parameter r2.
The default, limit and step values are:
■Default value 3.0°C
■Limit values 0.3to 19.9°C
■Step value 0.1°C
To define the cooling temperature difference, proceed as follows:
1Enter the list of direct parameters.
2Press the Akey once.
Direct parameter code r2 appears on the display.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to switch to the list of parameter codes.
6To adjust or to consult other direct parameters before saving the
modifications, select another direct parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
NOTE Do not forget to carry out the required maintenance
activities after resetting the timers.
Besides resetting timer c9 (running hours of the
compressor 1) and ca (running hours of the
compressor 2), it is also possible to reset timer cv
which defines the total running hours of the pump. To
do this, consult the timer's value (refer to paragraph
"Consulting actual operational information" on page 7)
and press the Aand Zkeys simultaneously for
approximately 5 seconds while the timer's value is
displayed. The timer's value becomes 0. Then
successively press the Rkey and the Ekey to return
to normal operation.
for 1 compressor for 2 compressors
12 15
compressor
inlet
water
temperature
of evaporator
ON
OFF
12 1513.5
compressor(s)
inlet
water
temperature
of evaporator
ON
ON
OFF
OFF
compressor2
compressor1

Operation manual
9EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
7To save the modifications, press the Ekey. To cancel the
modifications, wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of direct parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of direct
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Tasks carried out using user parameters
Entering the list of user parameters
Access to the list of user parameters is protected by the user
password (a 3-digit number between 0and 199).
To enter the list of user parameters, proceed as follows:
1Press the Ekey for approximately 5 seconds.
The number 00 starts flashing on the display.
2Enter the correct password using the Aand/or Zkey.
The password's value is 22.
3Press the Rkey to confirm the password and to enter the list of
user parameters.
The controller displays parameter code :d (which is the first user
parameter).
Defining the measurement unit
Depending on the setting of user parameter :d, all temperature
values are displayed in °C or in °F. The conversion formulas from °C
to °F and vice versa are:
■T°C = (T°F – 32)/1.8
■T°F = (T°Cx1.8)+32
If user parameter :d is set to 0, all temperatures appearing on the
display will be expressed in °C. If user parameter :d is set to 1all
temperatures will be expressed in °F.
To define the measurement unit, proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Press the Rkey to switch to the parameter value.
3Select the appropriate setting using the Aand/or Zkey.
4Press the Rkey to return to the list of parameter codes.
5To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 2 onwards.
6To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Defining the time delay between pump and compressor
startup
User parameter c7 allows you to define the time delay between the
pump startup and the compressor startup. The default, limit and step
values for the time delay are:
■Default value 15 sec
■Limit values 0to 150 sec
■Step value 1sec
To define the time delay, proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Select parameter code c7 using the Aand/or Zkey.
Parameter code c7 appears on the display.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to return to the list of parameter codes.
6To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
7To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Defining the time delay between unit and pump shutdown
User parameter c8 allows you to define the time delay between the
unit shutdown and the pump shutdown, more specifically the period
during which the pump will still be active after the unit has been shut
down. The default, limit and step values for the time delay are:
■Default value 0min
■Limit values 0to 150 min
■Step value 1min
To define the time delay, proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Select parameter code c8 using the Aand/or Zkey.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to return to the list of parameter codes.
6To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
7To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.

EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
10
Defining the timer threshold for maintenance warning
User parameter cb allows you to define a timer threshold (running
hours of the compressor) after which the controller will generate a
maintenance warning or request. The default, limit and step values
for the timer threshold are:
■Default value 0hours
■Limit values 0to 10,000 hours
■Step value 100 hours
To define the timer threshold, proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Select parameter code cb using the Aand/or Zkey.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to return to the list of parameter codes.
6To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
7To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Enabling or disabling the buzzer
When an alarm is detected, the buzzer is activated for the period
defined by user parameter p4. The default, limit and step values for
the activation period are:
■Default value 1min
■Limit values 0to 15 min
0buzzer disabled
15 buzzer active until muted by the user
■Step value 1min
To enable the buzzer for a certain period or to disable the buzzer,
proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Select parameter code p4 using the Aand/or Zkey.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to return to the list of parameter codes.
6To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
7To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Selecting local or remote on/off control
User parameter h7 in combination with the remote on/off switch
(installed by the customer) allows the user to switch the unit on
without using the Ikey on the controller.
■When user parameter h7 is set to 0(=No), the unit can only be
switched on by means of the Ikey on the controller.
■When user parameter h7 is set to 1(=Yes), the unit can be
switched on by means of the remote on/off switch and the
Ikey on the controller.
To select local or remote on/off control, proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Select parameter code h7 using the Aand/or Zkey.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to return to the list of parameter codes.
6To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
7To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Locking the controller keyboard
Once user parameter h9 is set to 0, the following advanced features
can no longer be carried out by means of the controller:
■modifying direct and user parameters (parameters can be
displayed but not modified),
■resetting the timers.
When user parameter h9 is set to 1, the above-described advanced
features can be carried out using the controller.
To lock or unlock the controller keyboard, proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Select parameter code h9 using the Aand/or Zkey.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to return to the list of parameter codes.
NOTE If the unit is always working in normal conditions, no
specific maintenance is requested. In this case the
warning function can be disabled by setting parameter
cb to 0.
Key on the controller Remote On/off switch UNIT RESULT
ON ON ON
ON OFF OFF
OFF ON OFF
OFF OFF OFF

Operation manual
11 EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
6To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
7To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Defining the unit's serial address
To control the unit from a supervisory system, an address card
(optional module) should be installed in the unit. The unit's serial
address required for communication with the supervisory system is
defined by parameter ha. The default, limit and step values for the
serial address are:
■Default value 1
■Limit values 1to 16
■Step value 1
To define the unit's serial address, proceed as follows:
1Enter the list of user parameters.
Parameter code :d appears on the display.
2Select parameter code ha using the Aand/or Zkey.
3Press the Rkey to switch to the parameter value.
4Select the appropriate setting using the Aand/or Zkey.
5Press the Rkey to return to the list of parameter codes.
6To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the Aand/
or Zkey and then repeat from instruction 3 onwards.
7To save the modifications, press the Ekey. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
TROUBLESHOOTING
This section provides useful information for diagnosing and correct-
ing certain troubles which may occur in the unit.
Before starting the trouble shooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
Before contacting your local dealer, read this chapter carefully, it will
save you time and money.
When a safety device was activated, stop the unit and find out why
the safety device was activated before resetting it. Under no circum-
stances safety devices may be bridged or changed to a value other
than the factory setting. If the cause of the problem cannot be found,
call your local dealer.
Symptom 1:The unit does not start, but the TLED lights up
Symptom 2:The unit does not start, but the TLED is flashing
Symptom 3:The unit does not start and the TLED does not light up
Symptom 4: One of the following safety devices is activated
When carrying out an inspection on the supply panel or on
the switch box of the unit, always make sure that the circuit
breaker of the unit is switched off.
POSSIBLE CAUSES CORRECTIVE ACTION
The temperature setting is not
correct. Check the controller setpoint.
Power supply failure. Check the voltage on the supply
panel.
Blown fuse or interrupted protection
device. Inspect fuses and protection devices. Replace by fuses of the same size
and type (refer to chapter "Electrical
specifications" on page 2).
Loose connections. Inspect connections of the field
wiring and the internal wiring of the
unit. Tighten all loose connections.
Shorted or broken wires. Test circuits using a tester and repair
if necessary.
POSSIBLE CAUSES CORRECTIVE ACTION
The flowstart timer is still running. The unit will start after approx. 15
seconds. Make sure that water is
flowing through the evaporator.
The anti-recycling timer is still active. The circuit can only start up after
approximately 4 minutes.
The guard timer is still active. The circuit can only start up after
approximately 1 minute.
POSSIBLE CAUSES CORRECTIVE ACTION
One of the following safety devices is
activated:
•Reverse phase protector
•Overcurrent relay (K*S)
•Discharge thermal protector (Q*D)
•Evaporating temperature thermostat
(S*T)
•Flow switch (S10L)
•High pressure switch (S*HP)
Check on the controller and refer to
symptom "4. One of the following
safety devices is activated". Refer to
the explanation of the digital
controller in the chapter "Resetting
alarms" on page 7.
The unit is in anti-freeze alarm. Check on the controller and refer to
symptom "4. One of the following
safety devices is activated". Refer to
the explanation of the digital
controller in the chapter "Resetting
alarms" on page 7
The remote ON/OFF input is
enabled and the remote switch is off. Put the remote switch on or disable the remote ON/OFF input.
The keyboard is locked. The user
parameter h9 is set to 0.
Unlock the controller keyboard.
Symptom 4.1: Overcurrent relay of compressor
POSSIBLE CAUSES CORRECTIVE ACTION
Failure of one of the phases. Check fuses on the supply panel or
measure the supply voltage.
Voltage too low. Measure the supply voltage.
Overload of motor. Reset. If the failure persists, call your
local dealer.
RESET Push the red button on the over-
current relay inside the switch box.
The controller still needs to be reset.
Symptom 4.2: Low pressure switch or anti-freeze alarm
POSSIBLE CAUSES CORRECTIVE ACTION
Water flow to water heat exchanger
too low. Increase the water flow.
Shortage of refrigerant. Check for leaks and refill refrigerant,
if necessary.
Unit is working out of its operation
range. Check the operation conditions of the unit.
Inlet temperature to the water heat
exchanger is too low. Increase the inlet water temperature.
Flow switch is not working or no
water flow. Check the flow switch and the water pump.
RESET After pressure rise, the low pressure
switch resets automatically, but the
controller still needs to be reset.

EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
12
Symptom 5: Unit stops soon after operation
Symptom 6: Unit runs continuously and the water temperature remains
higher than the temperature set on the controller
Symptom 7: Excessive noises and vibrations of the unit
MAINTENANCE
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
If the unit is used for air conditioning application, the described
checks should be executed at least once a year. In case the unit is
used for other applications, the checks should be executed every
4 months.
Maintenance activities
■Field wiring and power supply
•Check the power supply voltage on the local supply panel. The
voltage should correspond to the voltage marked on the identifi-
cation label of the unit.
•Check the connections and make sure they are properly fixed.
•Check the proper operation of the circuit breaker and the earth
leak detector provided on the local supply panel.
■Internal wiring of the unit
Visually check the switch box on loose connections (terminals
and components). Make sure that the electrical components are
not damaged or loose.
■Earth connection
Make sure that the earth wires are still connected properly and
that the earth terminals are tightened.
■Refrigerant circuit
•Check for leaks inside the unit. In case a leak is detected, call
your local dealer.
•Check the working pressure of the unit. Refer to paragraph
"Switching the EWLP unit on" on page 6.
■Compressor
• Check on oil leaks. If there is an oil leak, call your local dealer.
•Check for abnormal noises and vibrations. If the compressor is
damaged, call your local dealer.
■Water supply
•Check if the water connection is still well fixed.
•Check the water quality (refer to the installation manual of the unit
for specifications of the water quality).
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
Symptom 4.3: High-pressure switch
POSSIBLE CAUSES CORRECTIVE ACTION
Condenser fan does not operate
properly. Check that the fans turn freely. Clean if necessary.
Dirty or partially blocked condenser. Remove any obstacle and clean
condenser coil using brush and
blower.
Inlet air temperature of the
condenser is too high. The air temperature measured at the inlet of the condenser should not
exceed 43°C.
RESET After pressure decrease, the high
pressure switch resets automatically,
but the controller still needs to be
reset.
Symptom 4.4: Reverse phase protector is activated
POSSIBLE CAUSES CORRECTIVE ACTION
Two phases of the power supply are
connected in the wrong phase
position.
Invert two phases of the power
supply (by licensed electrician).
One phase is not connected
properly. Check the connection of all phases.
RESET After inverting two phases or fixing
the power supply cables properly,
the protector is reset automatically,
but the unit still needs to be reset.
Symptom 4.5: Discharge thermal protector is activated
POSSIBLE CAUSES CORRECTIVE ACTION
Unit is working outside the operation
range. Check the operation condition of the unit.
RESET After temperature decrease, the
thermal protector resets
automatically but the controller still
needs to be reset.
Symptom 4.6: Flow switch is activated
POSSIBLE CAUSES CORRECTIVE ACTION
No water flow. Check the water pump.
RESET After finding the cause, the flow
switch is reset automatically, but the
controller still needs to be reset.
POSSIBLE CAUSES CORRECTIVE ACTION
One of the safety devices is
activated. Check safety devices (refer to symptom "4. One of the following
safety devices is activated").
Voltage is too low. Test the voltage in the supply panel
and, if necessary, in the electrical
compartment of the unit (voltage
drop due to supply cables is too
high).
POSSIBLE CAUSES CORRECTIVE ACTION
The temperature setting on the
controller is too low. Check and adjust the temperature setting.
The heat production in the water
circuit is too high. The cooling capacity of the unit is too low. Call your local dealer.
Water flow is too high. Recalculate the water flow.
POSSIBLE CAUSES CORRECTIVE ACTION
Unit has not been fixed properly. Fix the unit as described in the
installation manual.
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply panel,
remove the fuses or open the protection devices of the
unit.
Do never clean the unit with water under pressure.
The wiring and power supply must be checked by a
licensed electrician.

Operation manual
13 EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
ANNEX I
Saturated temperature
The figures below represent the average saturated temperature of
R407C in relation to the pressure readout.
High pressure side
Low pressure side
conditions:
- high pressure = 20 bar
- subcool = 3°C
NOTES
10 2015 30255
5
10
15
20
25
30
35
4035 5045 6055 70
bar
65
5
10
9
8
7
6
4
3
2
1
bar
–10 0–5 105–15 2015 3025 4035 5045

NOTESNOTES

Zandvoordestraat 300, B-8400 Oostende, Belgium 4PW30043-1