Eliwell EWRC 300 NT Series User manual

QUICK START
EWRC 300/500/5000 NT
Controllers for static and ventilated cold rooms
English

EWRC 300/500/5000 NT 2 - EN
English
NB
The electrical panel (equipment) must be installed and repaired only by qualified staff. Eliwell accepts no
responsibility for any consequences resulting from the use of this material.
A qualified person is someone who has specific skills and knowledge regarding the structure and the
operation of electrical equipment and who has received safety training on how to avoid the inherent
dangers.
Product related information
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
• Turn off all devices, including connected devices, before removing any covers or doors, or
installing/uninstalling accessories, hardware, cables, or wires.
• Always use a properly rated voltage sensing device to conrm the power is off where and when
indicated.
• Replace and secure all covers, accessories, hardware, cables, and wires and conrm that a
proper ground connection exists before applying power to the unit.
• Use only the specied voltage when operating this equipment and any associated products.
• Comply with all the standards regarding accident protection and the local applicable safety
directives.
Failure to follow these instructions will result in death or serious injury.
DANGER
POTENTIAL FOR EXPLOSION
• Install this device only in areas known to be free from dangerous surroundings.
• Install and use this equipment in non-hazardous locations only.
Failure to follow these instructions will result in death or serious injury.
WARNING
UNINTENDED EQUIPMENT OPERATION
• The signal cables (probes, digital inputs, communication, and relative power supplies) must be
laid separately from the power cables.
• Every implementation of this device must be tested individually and completely in order to check
its proper operation before putting it in service.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.

3 - EN EWRC 300/500/5000 NT
English
INTRODUCTION
The Coldface EWRC 300/500/5000 NT series controls the temperature of a static or ventilated cold
room. The instrument controls positive and negative cold rooms and is capable of managing a double
evaporator and condenser probes.
Coldface has 3 or 5 configurable relays, depending on the model, and 2(3) configurable digital inputs
for door switches or other devices. Models are available with clock with yearly calendar and HACCP
event logging.
It is possible to connect the instrument to TelevisSystem / Modbus via the optional RS485 plug-in
module.
The container lets you install one or more electromechanical devices, depending on the model.
This summary document contains basic information about the standard
EWRC 300/500/5000 NT models. For further information and different configurations, refer to
the complete user manual cod. 9MA*0258 which is available to download free of charge from
www.eliwell.com.
INSTALLATION PROCEDURE
NOTE: procedural steps that are common to all models. Only the EWRC 5000 model is used as an
example.
1) Remove the cover and drill the holes for the cable clamps (at least one for power cables and one
for signalling cables) on the bottom of the panel.
NOTE: for the 300/500 models, use the drilling template provided.
Manual
defrost
Display HACCP alarms
if function active
Display alarms
if active
Functions Menu
Info
System
LOC keypad lock
rEd disable HACCP
rPA Pressure switch
rSE active Set reduced
rHC reset HACCP alarms
SET
-18.9
rtc
18.55
Pb1
-20.6
set time
and date
display probe
value
display probe
value
modify SetPoint
value conrm with
1 sec
1 sec
1 sec
3 sec
3 sec
function ON / OFF
Pb2
-20.6
inS
USr
see manual
diF
2.0
CPr
- - -
modify value conrm with
Turns light
on/o
Turns instrument
on/o
Parameters
SetPoint & Probes
NAVIGATION DIAGRAM

EWRC 300/500/5000 NT 4 - EN
English
2) Drill the wall fixing holes on the back of the
panel, in the areas marked on the back.
321,5 / 12,66
mm / in
343 / 13,5
171,5/ 6,75
360 / 14,17
3) Fix the back of the panel to the wall using four screws (not supplied) suited to the wall thickness.
NOTE: apply TDI20 screw caps (not provided) on 300/500 models.
4) Fit the hinges to secure the cover.
EWRC 5000
Place the panel cover up against the wall, making it
stick to the perimeter seal. Then, while holding the
cover in place, fit the two hinges provided into the
corresponding holes and press them until you hear
them click into place.
EWRC 300/500
Fit the hinges provided into their housings on
the right or left side of the panel and tighten the
corresponding screws to secure them.
5) Close the cover and secure it with the screws
provided.

5 - EN EWRC 300/500/5000 NT
English
ELECTRICAL CONNECTIONS
Output relay (default settings)
• OUT1 relay 1 = Compressor
(or liquid line valve)
• OUT2 relay 2 = Defrost
• OUT3 relay 3 = Evaporator fan
• OUT4 relay 4 = Light (EWRC 500/5000 only)
OUT1-4 common-line max 18 A
• OUT5 relay 5 = Alarm/AUX (EWRC 500/5000 only)
Probe inputs (default settings)
• Pb1 = Cold room NTC probe
• Pb2 = Defrost end NTC probe
• Pb3 = Not configured
Use parameter H00 to switch between NTC/PTC probe
types. SWITCH THE INSTRUMENT OFF AND ON
AGAIN after the change.
Digital Inputs (default settings)
• DI1 = Door switch
• DI2 = 300/500 model: not configured;
5000 mode: external alarm
• DI3 = not configured
Serial ports
• TTL for connecting to UNICARD / Copy Card
• TTL for connecting to TelevisSystem
• RS485 available ONLY with the optional plug-in
module for connecting to TelevisSystem / Modbus.
• Probe and digital inputs, OUT5 relay: 5.01 pitch screw terminals: electrical cables with a maximum section
of 2.5 mm2.
• Power supply and relay OUT1..OUT4: 7.62 pitch screw terminals: electrical cables with a maximum section
of 4 mm2.
5.08 mm (0.197 in.) pitch
7.62 mm (0.30 in.) pitch
DANGER
RISK OF ELECTRIC SHOCK, EXPLOSION OR EXPOSURE TO ACCESSIBLE PARTS
The final application must disallow access to parts at hazardous voltage, as the instrument offers no intrinsic
protection against this risk.
Failure to follow these instructions will resultin death or serious injury.
6) DIN rail-mounted models with window only.
Use the dedicated plugs (code 1602149)
to prevent access to the inside of the panel
through the front window.
For EWRC NT 500 models with the plastic
knockout removed and no internal circuit
breaker, the end user is responsible for
ensuring that the open parts of the box are
not accessible.
7) EWRC 5000 only. Fit the door: align the front
door with the two hooks at the bottom of the
panel and push it towards the right until it
clicks into place.
8) Close the door.
1
2
Ø 3,5 mm (0.14 in.)
mm2
AWG
0.2…2.5
24…14
0.2…2.5
24…14
0.25…2.5
22...14
2 x 0.25…0.75
2 x 22…18
2 x 0.2…0.75
2 x 24…18
2 x 0.2…0.75
2 x 24…18
2 x 0.5...1.5
2 x 20...16
mm
in.
7
0.28 C0.5...0.6
4.42...5.31
N•m
lb-in
0.25…2.5
22...14
Ø 3,5 mm (0.14 in.)
mm2
AWG
0.2…4
24…11
0.2…2.5
24…14
0.25…2.5
22...14
2 x 0.25…0.75
2 x 22…18
2 x 0.2…1.5
2 x 24…16
2 x 0.2…1.5
2 x 24…16
2 x 0.5...1.5
2 x 20...16
mm
in.
7
0.28 C0.5...0.6
4.42...5.31
N•m
lb-in
0.25…2.5
22...14

EWRC 300/500/5000 NT 6 - EN
English
18 19 20 2117
EWRC 300/500/5000 NT
GND GND GND+ +
1615141312111091 2 3 4 5 6 7 8
PB1 PB2 DI2 DI1
UNICARD
COM
NONC
N
L
EWRC 500NT/
5000 NT
only
OUT1 OUT2 OUT3 OUT4 OUT5
H21
230 Vac H22 H23 H24 H25
COPY CARD
Yellow cable
DISPLAY
RS485
OPTIONAL
ELIWELL
ELIWELL
18 A max
+
+
PB3/DI3
MODELS WITH DOOR AND INTERNAL CIRCUIT BREAKER
EWRC 500 NT BREAKER | EWRC 500 NT 4-DIN
Versions with a door on the front panel allow direct
access to the switch or to the upper part of the device
installed on the internal DIN rail.
To open the door, use both hands as shown in the
figure. Use your thumbs to apply gentle pressure at the
top to release the side tabs. Simultaneously with the
index finger gently pull the door toward you.
In versions provided with the miniature circuit breaker,
the installer must connect it to the power supply of the
electronic board through the wiring harness included
in the packaging.
The figure below shows the wiring diagram.
Versions with a door always have the omega DIN rail
installed.
You can mount up to a maximum of 4 DIN modules,
including 2DIN miniature circuit breaker when present.
It is easy to enlarge the window on the DIN housing
from 2 to 4 DIN, using the knockouts as shown in the
figure at the top right.
Cable types and wire sections for the circuit breaker
Ø 3,5 mm (0.14 in.)
mm2
AWG
1…35
18…2
1…25
18…2
mm
in.
14
0.55 C3.5
31
N•m
lb-in

7 - EN EWRC 300/500/5000 NT
English
18 19 20 2117
EWRC 500 NT BREAKER
GND GND GND+ + +
1615141312111091 2 3 4 5 6 7 8
PB1 PB2 DI2 DI1
COM
NONC
OUT1 OUT2 OUT3 OUT4 OUT5
H21 H22 H23 H24 H25
N
L
230 Vac
16 A max
+
PB3/DI3
DANGER
RISK OF ELECTRIC SHOCK, EXPLOSION OR EXPOSURE TO ACCESSIBLE PARTS
Prevent access to parts at hazardous voltages, as the instrument offers no protection against this risk.
Failure to follow these instructions will resultin death or serious injury.
For EWRC NT 500 models with plastic knockout removed and no thermal-magnetic breaker installed: the end user
is responsible for ensuring that open parts of the box cannot be accessed.
DISPLAY
3-FIGURE UPPER DISPLAY
plus the - sign
Display:
• Operating value
• parameters label
• alarms, functions
if Upper display
blinking
it means that the value of the
Lower Display can be modified
4-FIGURE LOWER DISPLAY
Display:
• parameters value
• probe value
• function state
HACCP models
• time
B
A
C
F
E
D
%RH

EWRC 300/500/5000 NT 8 - EN
English
1
%RH
2 3 4 5 6 7 8
17
18
19
9
10
11
12
13
14
15
16
No. LED COLOUR ON FLASHING OFF
1 POWER SUPPLY green Power supply ON / Power supply OFF
2 ENERGY SAVING amber Energy saving ON / Energy saving OFF
3 NIGHT & DAY amber Night & Day ON / Night & Day OFF
4 HACCP amber HACCP menu / /
5 DEEP COOLING (DCC) amber Drip cooling cycle ON /
Drip cooling cycle OFF
6 PUMP DOWN amber Compressor Pump Down ON / Compressor Pump Down OFF
9 COMPRESSOR amber Compressor ON delay Compressor OFF
10 DEFROST 1 amber defrost coil drainage No defrost
11 EVAPORATOR FANS amber Fans ON forced ventilation Fans OFF
12 DEFROST 2 amber defrost coil drainage No defrost
13 HACCP ALARM red HACCP alarm Not displayed No alarm
14 AUXILIARY (AUX) amber AUX ON / AUX OFF
15 LIGHT amber Light ON / Light OFF
16 CONDENSER FANS amber Fans ON / Fans OFF
ON: function/alarm ON; OFF: function/alarm OFF
LED
ALARMS
No. LED colour description
17 RH amber not used
18 TIME amber access in case of time display or editing
19 DATA amber access in case of date display or editing
Alarms LED 7 LED 8 Colour Buzzer
Off
LED Buzzer
ALARM Red See “ALARMS TABLE” page 13
PANIC Red --- ---
LEAK DETECTOR Red
...
---
PANIC +
LEAK DETECTOR Red --- (1)
(1) = As long as the Panic alarm persists it will not be possible to mute the buzzer from the keypad.
KEYS
No. KEY press and release press and hold for about
3seconds NAVIGATION MENU Notes
AESC
Defrost • Functions Menu • Manual defrost • Return to Main Menu • Output
BpUP
Alarms • Alarms Menu (always visible) / • Scroll
• Increase values
HACCP alarms
only on foreseen models
and if present
C SET
• Display SetPoint / probe values /
time (Models with clock)
• Conrm values
• Access value edit mode
(upper display blinking)
Access Parameters menu • Conrm values
• Move right
display time
Models with clock only
DqDOWN
AUX
system INFO
See Technical Support Activate auxiliary function • Scroll • Decrease values
E ON/OFF / Switch On/O device /
F LIGHT / Switch light On/O /

9 - EN EWRC 300/500/5000 NT
English
USER INTERFACE
How to modify the SetPoint
• Press and release the SET key. The upper display will show SEt, the lower display will indicate the
current SetPoint value
• Press and release the SET key once more. The upper display will show SEt blinking
• Use the UP & DOWN keys to adjust the Setpoint value
• Press the ESC key several times (or keep it pressed) to return to the normal display
How to read the probe value
• Press and release the SET key. The upper display will show SEt, the lower display will indicate the
current SetPoint value
• Press and release the DOWN key. If the RTC clock is present, the time will be shown in the lower display
• Press and release the DOWN key once more. The upper display will show Pb1, the lower display will
indicate the value read by the room probe
• Press and release the DOWN key once more to read the value of probe Pb2 and Pb3 if configured
• Press the ESC key to return to the normal display.
How to modify the User Parameters
The ‘User’ parameters are the most useful ones. This document describes them in the Parameter
Table section.
1) Press and hold the SET key for 3 seconds until the display shows USr
2) Press and release the SET key again. The upper display will show the first parameter, the lower display
will indicate the current parameter value
3) Using the UP & DOWN keys, find the parameter that you wish to modify
4) Press and release the SET key again. The upper display will show the name of the blinking parameter
5) Use the UP & DOWN keys to adjust the parameter value.
6) Press and release SET to save the parameter value
7) Return to step 3) or press ESC several times to return to the normal display
USER PARAMETERS TABLE
This section describes the most commonly used parameters, which are always visible (the access password PA1 is not enabled by default).
For a description of all other parameters, see the user manual.
NOTE: the user parameters are NOT divided into sub-folders and are always visible.The same parameters are also visible in the respective fold-
ers ‘Compressor’, ‘Fans’, etc. (indicated also here to make the groupings clearer) in the password-protected Installer parameters menu.
PAR. DESCRIPTION M.U. RANGE DEFAULT
SEt Temperature control SEtpoint °C/°F -58.0...302 0.0
COMPRESSOR (CPr)
diF Activation differential
N.B.: diF cannot be equal to 0. °C/°F 0 ... 30.0 2.0
HSE Maximum value that can be assigned to the setpoint.
NOTE: The two setpoints are interdependent: HSE cannot be less than LSE and vice-versa. °C/°F LSE ... HdL 50.0
LSE
Minimum value that can be assigned to the setpoint.
NOTE: The two setpoints are interdependent: LSE cannot be greater than HSE and vice
versa.
°C/°F LdL ... HSE -50.0
OSP Temperature value to be added algebraically to the Setpoint if reduced set enabled (Economy function).
Enabling can take place via key, function or digital input configured specifically for this purpose. °C/°F -30.0 ... 30.0 0.0
Cit Minimum activation time of compressor before possible deactivation.
If Cit = 0 not active. min 0 ... 255 0
CAt Maximum activation time of compressor before possible deactivation.
If CAt = 0 not active. min 0 ... 255 0
Ont
Controller switch-on time in the event of faulty probe.
- if Ont = 1 and OFt = 0, the compressor stays on permanently (ON),
- if Ont > 0 and OFt > 0, it operates in Duty Cycle mode.
min 0 ... 255 10
OFt
Controller switch-off time in the event of faulty probe.
- if OFt = 1 and Ont = 0, the compressor stays off permanently (OFF),
- if Ont > 0 and OFt > 0, it operates in Duty Cycle mode
min 0 ... 255 10

EWRC 300/500/5000 NT 10 - EN
English
PAR. DESCRIPTION M.U. RANGE DEFAULT
dOn
Delayed start. The parameter indicates that a protection is active on the general compressor relay
actuations. At least the indicated time must elapse between the request and the actual activation of the
compressor relay.
sec 0 ... 255 2
dOF Delay time after power-off: the delay time indicated must elapse between deactivation of the compressor
relay and the next power-on. min 0 ... 255 0
dbi Delay between switch-ons; the delay time indicated must elapse between two consecutive compressor
power-ons. min 0 ... 255 2
OdO Delay in activating outputs after the instrument is switched on or after a power failure.
0 = Not active min 0 ... 255 0
dS2 DEFROST (dEF)
dtY
Defrost mode
0= Electric defrost (OFF Cycle defrost), i.e. compressor not running during defrost);
NOTE: electrical defrost + air defrost, when the fans are connected in parallel to the defrost output relay
1= cycle inversion defrost (hot gas, or compressor on during defrost);
2 = “Free” mode defrost (independent from the compressor)
num 0 ... 2 0
dit
Interval between defrost cycles
Interval between the start of two consecutive defrost cycles.
0= Function disabled (defrost NEVER performed).
hours/mins/
secs 0 ... 255 6 hours
dCt
Defrost interval count mode
0= Compressor running time (DIGIFROST® method);
defrost active ONLY when the compressor is on.
N.B.: compressor running time is counted separately from the evaporator probe (count active also when
evaporator probe missing or faulty).
1= Appliance running time; defrost counting is always active when the machine is on and starts at each
power-on;
2= Compressor stopped. Every time the compressor stops, a defrost cycle is performed according to
parameterdtY;
3= With RTC. Defrost at specific times set by parameters dE1...dE8, F1...F8
num 0 ... 3 1
dOH Defrost cycle enabling delay from request
Delay preceding start of first defrost after call. min 0 ... 59 0
dEt Defrost timeout
Determines the maximum defrost time on Evaporator 1.
hours/mins/
secs 1 ... 255 30 min
dSt Defrost end temperature
Defrost 1 end temperature (determined by evaporator probe 1). °C/°F -302.0 ... 1472.0 6.0
dPO
Defrost enabling request from power-on
Determines whether or not the instrument must defrost at power-up
(provided that the temperature measured at the evaporator will allow defrost).
n(0) = No, no defrost at power-on; y(1) = Yes, defrost at power-on.
flag n/y n
FANS (FAn)
FSt Fans lockout temperature; if the value read is greater than FSt, the fans will be stopped.The value may
be positive or negative. °C/°F -58.0...302 0.0
FAd Fans activation differential °C/°F 0.1 ... 25.0 0.1
Fdt Fans activation delay after a defrost cycle min 0 ... 250 0
dt dripping time. Dripping time. min 0 ... 250 0
dFd Operating mode of evaporator fans during defrost.
n (0) = no (depending on the FCO parameter); y(1) = yes (fan off). flag n/y y
FCO Evaporator fans operating mode.The status of the fans will be:
With the compressor ON, the fans are thermostat-controlled.With the compressor OFF, it depends on FCO
FCO=0, fans OFF
FCO=1-2, fans thermoregulated
FCO=3-4, fans in duty cycle
Dutycycle: controlled by way of parameters “FOn” and “FOF”.
num 0 ... 4 1
ALARMS (ALr)
AFd Alarms cut-in differential. °C/°F 0.1 ... 25.0 1.0
HAL Probe 1 maximum alarm. Temperature value (intended either as distance from setpoint or as an absolute
value based on Att) above which the probe will trigger activation of the alarm signal. °C/°F LA1...302 5.0
LAL Probe 1 minimum alarm. Temperature value (intended as distance from setpoint or as an absolute value
based on Att) beneath which the probe will trigger activation of the alarm signal. °C/°F -58.0...HA1 -5.0
PAO Alarm exclusion time after device is switched on following a power failure.
This parameter refers to high/low temperature alarms LAL and HAL only. hours 0 ... 10 3

11 - EN EWRC 300/500/5000 NT
English
PAR. DESCRIPTION M.U. RANGE DEFAULT
dAO Temperature alarm exclusion time after defrost. min 0 ... 250 60
tAO Delay preceding temperature alarm signal.
This parameter refers to high/low temperature alarms LAL and HAL only. min 0 ... 250 0
DISPLAY parameters (diS)
LOC
LOCk. Setpoint edit lock. The parameter programming menu can still be accessed, and the settings
changed, which means also that the status of this parameter can be changed so as to unlock the keypad.
n (0) = No; y (1) = Yes.
flag n/y n
PA1 PAssword 1. When enabled (PA1 ≠ 0) this password provides access to level1 parameters (User). num 0 ... 250 0
ndt Display values with decimal point.
n(0) = No (integers only); y(1) = Yes (displayed with decimal point). flag n/y y
CA1
Calibration of probe Pb1.
Positive or negative temperature value added to the value read by Pb1. This sum is used for both
temperature display and temperature regulation purposes.
°C/°F -30.0...30.0 0.0
CA2
Calibration of probe Pb2.
Positive or negative temperature value added to the value read by Pb2. This sum is used for both
temperature display and temperature regulation purposes.
°C/°F -30.0...30.0 0.0
ddL
Display mode during defrost.
0= Displays the temperature read by the probe.
1= Locks the reading at the temperature value registering via the probe when the defrost cycle starts
and until the next time the SEt is reached.
2= Displays the label dEF during defrosting and until the SEt is reached (or until Ldd has elapsed)
num 0/1/2 1
CONFIGURATION (CnF)
If one or more parameters in the folder are changed, the controller MUST be switched off and switched on again.
H00
Selection of type of probe used (Pb1 ... Pb3).
(0) = PTC
(1) = NTC
num 0/1
(PTC/NTC) 1 (NTC)
H23*
Configuration of digital output 3 (OUT 3).
num 0 ... 13 3
0= disabled
1= compressor
2= defrost 1
3= evaporator fans
4= alarm
5= AUX
6= stand-by
7= light
8= buzzer output
9= defrost 2
10 = compressor 2
11 = frame heater
12 = condenser fans
13 = compressor pump down
H42
Evaporator probe (Pb2) present
n (0) = not present
y (1) = present
num n/y y
rEL Firmware version release (e.g. 1,2,...). Read only. See Technical Support. / / /
tAb Map code. Read only. See Technical Support. / / /
COPY CARD parameters (FPr).
UL Upload. Transfers programming parameters from the instrument to a Copy Card / UNICARD. / / /
dL Download. Transfers programming parameters from a Copy Card / UNICARD to the instrument. / / /
Fr
Formatting. Deletes data on the Copy Card / UNICARD.
NOTE: If parameter “Fr” is used, the data entered will be permanently lost. This operation
cannot be reversed.
/ / /
* H23 Installer (inS) level for the EWRC5000 model
IT IS POSSIBLE TO EDIT OTHER PARAMETERS AVAILABLE IN THE INSTALLER (inS) LEVEL OF THE INSTRUMENT
How to edit the installer level parameters
Procedure applies only to more advanced applications. In this case the parameters are arranged in
folders (Compressor / Defrost / Fans etc)
1) Press and hold the SET key for 3 seconds until the display shows USr
2) Use the UP & DOWN keys to select the inS parameter section
3) Press and release the SET key again. The display will show the first folder
4) Press and release the SET key again. The upper display will show the first parameter in the folder, the
lower display will indicate the current parameter value
5) Use the UP & DOWN keys to find the parameter that you want to modify
The procedure proceeds in a similar manner to that described for the User parameters (points 4-7)

EWRC 300/500/5000 NT 12 - EN
English
OPERATION IN DEFAULT CONFIGURATION
The instrument is configured for negative cold. For positive cold, disable the evaporator probe Pb2
(setH42=n) and set relay OUT3 (parameter H23=6) to prevent continuous ventilation.
COMPRESSOR
The compressor is active if the cold room temperature measured by Pb1 exceeds the value of SEt +
differential diF. The compressor stops if the cold room temperature detected by Pb1 falls below the SEt
value. The instrument includes compressor on/off protection*
DEFROST
Defrost is by means of electric heaters (parameter dty = 0) and the time counter is always active with the
instrument switched on (dCt=1).
Manual defrost
Manual defrost is activated by pressing and holding the ESC key (A).
If conditions are not right for defrosting, (e.g. the evaporator probe temperature is higher than the
defrosting end temperature) or the parameter OdO≠0, the display will blink three times to indicate that
the operation will not be performed.
Default Defrost settings
dit = 6 hours. interval between 2 defrost cycles
dSt = 6.0°C. Defrosting end temperature. Set by Pb2.
The Defrost cycle may terminate due to a timeout based on the parameter dEt (default 30 min).
EVAPORATOR FANS
The OUT3 relay is configured as the fan relay and is activated when required, according to the delay and
parameter settings*.
Default fan settings
dt = 0 min. dripping time
dFd = Y. Fans off during defrosting.
LIGHT (EWRC 500/5000)
The light is activated by pressing and holding the LIGHT key (F).
Since digital input D.I. 1 is configured as door switch, relay OUT4 (light) is activated when the door is
opened. The light also switches on with the instrument in standby*.
ALARM RELAY (EWRC 500/5000)
Relay OUT5 is configured as alarm relay and is activated in the case of alarms, according to delays and
parameter settings. *FOR MORE INFORMATION READ the manual, code 9MA*0258
SUPERVISION
EWRC 300/500/5000 NT can be connected to:
• TelevisSystem or third-party remote control systems via Modbus protocol
• DeviceManager fast parameter configuration software
The connection is direct RS-485 using the optional RS485/TTL plug-in module (not included). See the
Wiring diagram.
NOTE: if using the TTL port to communicate, disconnect the RS-485 port and vice-versa.
*FOR MORE INFORMATION READ the manual, code 9MA*0258

13 - EN EWRC 300/500/5000 NT
English
ALARMS AND TROUBLESHOOTING
How to display the alarms
1) Press and release the UP key. The upper display will always show the label ALr. The lower display will
show:
• nOnE if no alarms active
• SYS to indicate system alarms - see Alarms Table
• HACP to indicate HACCP alarms - see HACCP alarms
2) Using the UP & DOWN keys, find the type of alarm that you want to check
System alarms
The upper display will show the label ALr, the lower display will indicate the alarm code - see Alarms
Table
• Using the UP & DOWN key, scroll the other alarms
• Press the ESC key to return to the previous alarm code, press the ESC key several times (or keep it
pressed) to return to the normal display
HACCP ALARMS • AVAILABLE ONLY FOR HACCP MODELS
The instrument logs high and low temperature alarms for the cold room probe, as well as any power
failures. The alarm types and the duration and start time of the alarm itself will be displayed in the alarms
folder ALr. It is possible to disable the recording of alarms and/or resetting of HACCP alarms. See
Functions Menu.
FOR MORE INFORMATION READ the manual, code 9MA*0258
ALARMS TABLE
This section lists alarms associated with the default conguration of the instrument.
For a description of alarms relating to custom congurations, refer to the user manual or contact Eliwell Technical Support.
Label Cause Eects Problem solving
E1*
Pb1 room probe faulty
• Measured values are outside operating
range
• Probe faulty/short-circuited/open
• Label E1 displayed
• Maximum and minimum alarm regulator
disabled
• Compressor operation based on
parameters“Ont”and“OFt”if set for duty
cycle.
• Check probe type NTC/PTC (see H00)
• Check probe wiring
• Replace probe
E2*
Pb2 defrost probe faulty
• Measured values are outside operating
range
• Probe faulty/short-circuited/open
• Label E2 displayed
• The Defrost cycle will end due to time-
out (Parameter“dEt”)
• Check probe type NTC/PTC (see H00)
• Check probe wiring
• Replace probe
LA1
Pb1 LOW temperature alarm
• Value read by Pb1 < LAL after time of
tAO.
• Recording of label LA1 in folder ALr
• No eect on regulation
• Wait for the temperature value read by Pb1
to come back above LAL+AFd
HA1
Pb1 HIGH temperature alarm
• value read by probe Pb1 > HAL after
time of“tAO”.
• Recording of label HA1 in folder ALr
• No eect on regulation
• Wait until temperature value read by Pb1
returns below HAL-AFd.
TECHNICAL SUPPORT
Have the following information available when contacting Eliwell Technical Support:
• IdF firmware version (e.g. 554)
• rEL firmware version release (e.g. 1,2,...)
• tAb map code
• rC instrument model (e.g. 300 or 500)
To obtain this information:
• Press and release the DOWN / INFO key
• Press and release the DOWN key once more to display other information about the instrument.
• Press the ESC key to return to the normal display.

EWRC 300/500/5000 NT 14 - EN
English
This section lists alarms associated with the default conguration of the instrument.
For a description of alarms relating to custom congurations, refer to the user manual or contact Eliwell Technical Support.
Label Cause Eects Problem solving
Ad2
End of defrost cycle due to time-
out rather than due to defrost end
temperature being read by the defrost
probe
• Recording of label Ad2 in folder ALr • Wait for the next defrost cycle for automatic
return
OPd
• Digital input is activated
(set as door switch)
See para. H11/H12/H13
• Depends on delay set by parameter tdO
• Recording of label OPd in folder ALr
• Regulator locked (see para. dOA/PEA)
• Close door
• Depends on delay set by parameter OAO
E10**
**Models with clock only
Clock alarm: clock faulty or unpowered
for a long time
Functions associated with clock not
controlled Contact EliwellTechnical Support
ALL ALARMS
• Alarm icon on continuously
• Buzzer (if present) and alarm relay (OUT5) activated, except Ad2
• Press any key to mute the alarm.The LED changes from a steady light to a blinking light.
NOTE: the buzzer is deactivated while the alarm relay remains active
*E1 - E2: If simultaneous they will be shown alternately on the display at a frequency of 2 seconds
TECHNICAL DATA (EN 60730-2-9:2010, EN 61439-1:2011 / 61439-2:2011 / EN 60204-1:2006)
DESCRIPTION
Front panel
IP65
Classification
Electronic automatic control device (not safety device) for stand-alone installation
Installation
wall
EWRC300/500: spacing
holes A-B 116 mm (4.57 in); holes C-D 87 mm (3.42 in); holes A-C 235 mm (9.25 in)
Hinges are available for mounting on special compartments for opening the cover both right
and left.
Screw on the respective anchoring screws taking care that the hinges are fitted well and lie flush
so that they do not interfere with the compression of the seal
wall
EWRC5000: See Mechanical Installation paragraph
Type of action
1.B
Pollution class
2 (IEC 60664-1:2007)
Panel type
Fixed panel
Maximum installation site altitude
2000 m (2187 yd)
Weight
< 2 kg (< 4.41 lb)
Panel use
Internal use
Material class
IIIa
Over voltage category
II (IEC 60664-1:2007)
Nominal pulse voltage
2500 V
Operating temperature
-5 ... 50 °C (EN 60730-2-9:2010)
Power supply
230 Va ± 10 % 50/60Hz
Control
EWRC NT electronic controller
Power consumption
11 VA max
Digital outputs (relay)
refer to the label on the device
Fire resistance category
D
Software class
A
Connection
device on external flexible cable,Y type connection
Ball test temperature
100 °C ( 212 °F)

15 - EN EWRC 300/500/5000 NT
English
DESCRIPTION
EWRC 500 BREAKER
Circuit breaker
Two-pole (2P)
ELECTRICAL SPECIFICATIONS
DESCRIPTION
Rated voltage (Un)
230 Vac
Rated operating voltage (Ue)
230 Vac
Rated insulation voltage (Ui)
230 Vac
Conditioned short circuit current (Icc)
< 4.5 kA
Rated frequency (fn):
50/60 Hz
EWRC 500 BREAKER
:
Rated impulse withstand voltage (Uimp)
4 kV
Rated panel current (InA)
16 A
Rated circuit current (InC)
16 A
FURTHER INFORMATION
DESCRIPTION
Container
PC+ABS
Dimensions
EWRC 300/500: front panel 213 x 318 mm, depth 102 mm
EWRC 500 BREAKER: front panel 221 x 318 mm, depth 107 mm
EWRC 5000: front panel 420 x 360 mm, depth 147 mm
Connections
screw-on terminals (see wiring diagram)
with internal housing for magnetothermal switch, remote control switch, contactor, etc. on DIN rail
Storage temperature
-20 ... 85 °C
Operating humidity
10...90% RH non-condensing
Storage humidity
Display range –50…110 (NTC) / –55…150 °C (PTC) without decimal point, on 2 displays:
(upper display) 3 digit + sign/ (lower display) 4 digit
Analogue Inputs
3(2) NTC inputs selectable with parameter H00
Digital Inputs
2(3) voltage-free digital inputs configurable with parameter H11/H12/H13
Relay outputs
EWRC 300
• OUT1 SPST 2 HP 12(12) A 250 Vac
• OUT2 SPST 1 HP 8(8) A 250 Vac
• OUT3 SPST 1/2 HP 8(4) A 250 Vac
common-line max 18 A
EWRC 500/5000
• OUT1 SPST 2 HP 12(12) A 250 Vac
• OUT2 SPST 1 HP 8(8) A 250 Vac
• OUT3 SPST 1/2 HP 8(4) A 250 Vac
• OUT4 SPST 1 HP 8(8) A 250 Vac
• OUT5 SPDT 1/2 HP 8(4) A 250 Vac
common-line max 18 A
Buzzer
only on models where this is provided
Serial ports
• 1 TTL port for connection to Unicard / Copy Card
• 1 TTL port for connection to TelevisSystem
• 1 RS-485 serial port for connection to TelevisSystem / Modbus
(use with optional plug-in module)
Note: if using the TTL port to communicate, disconnect the RS-485 port and vice-versa.
Accuracy
better than 0.5% of full scale +1 digit
Resolution
1 or 0.1 °C
Clock backup
Up to four days in the absence of an external power supply

Eliwell Controls s.r.l.
Via dell’Industria, 15 • Z.I. Paludi
32016 Alpago (BL) ITALY
T [phone]
www.eliwell.com
Technical Customer Support
T [phone]
E [email protected]
Sales
T [phone] (Italy)
T+39 0437 986 200 (other countries)
E [email protected]
9IS54389 - EN - rel. 09/17
© Eliwell Controls s.r.l. 2014-17 All rights reserved.
Food safety
The device complies with Standard EN13485 as follows:
- suitable for storage
- application: air
- climate range A
- measurement class 1 in the range -25 °C to 15 °C (-13 °F to 59 °F) (only when using Eliwell probes)
Permitted use
This equipment is used to control cold rooms in commercial refrigeration sectors.
For safety reasons, the equipment must be installed and used in accordance with the instructions provided.
Prohibited use
Any use other than that described in the previous paragraph, “Permitted use”, is strictly forbidden.
The relays supplied are electromagnetic and are subject to wear. The protection devices required by international or
local laws must be installed outside the equipment.
LIABILITY AND RESIDUAL RISKS
The liability of Eliwell Controls srl is limited to the correct and professional use of the product according to the
directives referred to herein and in the other supporting documents, and does not cover any damage (including but
not limited to) the following causes:
unspecified installation/use and, in particular, in defiance of safety requirements of established legislation and/or
specified in this document;
installation/use on equipment which does not comply with established legislation and technical standards
tampering with and/or modification of the product.
DISCLAIMER
This document is the exclusive property of Eliwell and cannot be reproduced or circulated unless expressly
authorised by Eliwell. All possible care has been taken to ensure the accuracy of this document; nevertheless,
Eliwell Controls srl cannot accept liability for any damage resulting from its use. The same applies to any person or
company involved in the creation and preparation of this document. Eliwell reserves the right to make aesthetic or
functional changes at any time without notice.
DISPOSAL
The equipment (or product) must be subjected to separate waste collection in compliance with
the local legislation on waste disposal.