Eliwell EWRC 300 NT Series User manual

EWRC 300/500 NT
Controllers for cold rooms for on-board installation
USER
MANUAL

EWRC 300/500 NT Contents
CONTENTS
1. INTRODUCTION ........................................................................................ 5
1.1. GENERAL DESCRIPTION.................................................................................................. 5
1.2. ADVANTAGES AND FEATURES ........................................................................................ 5
1.3. MODELS .......................................................................................................................... 5
2. TECHNICAL DATA ...................................................................................... 6
2.1. TECHNICAL SPECIFICATIONS (EN 60730-2-9) ................................................................ 6
2.2. FURTHER INFORMATION ................................................................................................ 6
2.2.1. INPUT CHARACTERISTICS ...............................................................................................................................................6
2.2.2. OUTPUT CHARACTERISTICS ...........................................................................................................................................7
2.2.3. MECHANICAL CHARACTERISTICS .................................................................................................................................7
2.2.4. FOOD SAFETY...................................................................................................................................................................7
2.3. DISPOSAL ........................................................................................................................ 7
3. CONNECTIONS.......................................................................................... 8
3.1. GENERAL WARNINGS...................................................................................................... 8
3.1.1. POWER SUPPLY - DANGEROUS VOLTAGE OUTPUTS (RELAY)...................................................................................8
3.1.2. ANALOGUE INPUTS-PROBES..........................................................................................................................................8
3.1.3. SERIAL CONNECTIONS ...................................................................................................................................................8
3.1.4. RS485 CONNECTION ......................................................................................................................................................8
3.1.5. TTL CONNECTION ...........................................................................................................................................................8
3.2. WIRING DIAGRAM........................................................................................................... 9
3.2.1. TERMINALS ........................................................................................................................................................................9
3.3. WIRING DIAGRAM FOR MODELS WITH MAGNETO-THERMAL SWITCH INSTALLED ...... 10
3.3.1. TERMINALS ........................................................................................................................................................................10
4. MECHANICAL INSTALLATION ................................................................... 11
4.1. MECHANICAL INSTALLATION.......................................................................................... 11
4.1.1. WALL-MOUNTING ............................................................................................................................................................11
5. USER AND START-UP INTERFACE .............................................................. 14
5.1. DISPLAY ........................................................................................................................... 14
5.1.1. KEYS....................................................................................................................................................................................14
5.1.2. LEDS....................................................................................................................................................................................15
5.1.3. PRELIMINARY CONFIGURATIONS..................................................................................................................................16
5.1.4. OPERATION IN DEFAULT CONFIGURATION ................................................................................................................16
5.1.5. NAVIGATION .....................................................................................................................................................................17
5.1.6. FUNCTIONS MENU AND KEY-ACTIVATED FUNCTIONS.............................................................................................18
5.1.7. PASSWORD........................................................................................................................................................................19
5.1.8. SETTING THE SETPOINT ..................................................................................................................................................20
5.1.9. VIEWING PROBE VALUES ................................................................................................................................................21
5.1.10. HOW TO MODIFY THE DATE AND TIME.....................................................................................................................22
5.1.11. DISPLAYING ALARMS ....................................................................................................................................................23
5.1.12. SYSTEM ALARMS EXAMPLE ..........................................................................................................................................23
5.1.13. MODIFYING A PARAMETER ..........................................................................................................................................24
5.1.13.1 How to modify a user parameter 24
5.1.13.2 How to modify an Installer parameter 25

EWRC 300/500 NT - Contents
6. FUNCTIONS AND REGULATORS................................................................ 26
6.1. SETTINGS ........................................................................................................................ 26
6.1.1. PROBE SETTING AND CALIBRATION ............................................................................................................................26
6.1.2. DISPLAY SETTINGS ...........................................................................................................................................................26
6.2. FUNCTIONS ..................................................................................................................... 27
6.2.1. UPLOAD, DOWNLOAD, FORMAT...................................................................................................................................27
6.2.2. MULTI FUNCTION KEY .....................................................................................................................................................28
6.2.3. UNICARD............................................................................................................................................................................28
6.3. BOOT LOADER FIRMWARE.............................................................................................. 29
6.4. COMPRESSOR ................................................................................................................. 30
6.4.1. COMPRESSOR CONFIGURATION ..................................................................................................................................30
6.4.2. SECOND COMPRESSOR CONFIGURATION.................................................................................................................30
6.4.3. COMPRESSOR OPERATING CONDITIONS...................................................................................................................30
6.5. COMPRESSOR/GENERAL PROTECTIONS........................................................................ 31
6.5.1. COMPRESSOR SAFETY TIMINGS....................................................................................................................................32
6.6. DEFROST/DRIPPING........................................................................................................ 33
6.6.1. DEFROST TYPE AND ACTIVATION .................................................................................................................................33
6.6.2. AUTOMATIC DEFROSTING .............................................................................................................................................34
6.6.3. MANUAL DEFROST...........................................................................................................................................................34
6.6.4. EXTERNAL DEFROST........................................................................................................................................................35
6.7. DEFROST MODE .............................................................................................................. 36
6.7.1. DEFROST WITH ELECTRIC HEATERS .............................................................................................................................36
6.7.2. INVERSE DEFROST............................................................................................................................................................37
6.7.3. DOUBLE EVAPORATOR DEFROST .................................................................................................................................38
6.8. EVAPORATOR FANS......................................................................................................... 40
6.8.1. EVAPORATOR FAN OPERATING CONDITIONS ...........................................................................................................40
6.8.2. FAN OPERATION IN THERMOREGULATION MODE...................................................................................................41
6.8.3. FAN OPERATION IN DUTY CYCLE MODE .....................................................................................................................41
6.8.4. FAN OPERATION IN DEFROST........................................................................................................................................42
6.8.4.1 Fan operation without probe 42
6.8.5. FAN FUNCTION DURING DRIPPING ..............................................................................................................................43
6.8.6. POST-VENTILATION..........................................................................................................................................................43
6.9. DEEP COOLING CYCLE - DCC .......................................................................................... 44
6.10. PREHEAT........................................................................................................................ 44
6.11. PRESSURE SWITCH........................................................................................................ 45
6.11.1. AUXILIARY OUTPUT (AUX/LIGHT) ................................................................................................................................46
6.12. DOOR/EXTERNAL ALARM MANAGEMENT ................................................................... 47
6.13. DEMISTING HEATERS (FRAME HEATERS)...................................................................... 49
6.14. CONDENSER FANS ........................................................................................................ 50
6.15. STAND-BY ...................................................................................................................... 51
6.16. PUMP DOWN................................................................................................................. 51
6.16.1. SERVICE STOPPAGE .......................................................................................................................................................51

EWRC 300/500 NT Contents
7. PARAMETERS ............................................................................................ 52
7.1. HOW TO MODIFY THE USER PARAMETERS .................................................................... 52
7.2. HOW TO EDIT THE INSTALLER LEVEL PARAMETERS ....................................................... 52
7.3. PARAMETER TABLE ......................................................................................................... 53
7.3.1. PARAMETER H60...............................................................................................................................................................62
8. ALARMS..................................................................................................... 63
8.1. ALARMS AND SIGNALS TABLE......................................................................................... 63
8.2. ALARM CAUSE/EFFECT TABLE ........................................................................................ 64
8.3. DESCRIPTION OF ALARMS .............................................................................................. 66
8.3.1. PROBE ALARM...................................................................................................................................................................66
8.3.2. MINIMUM AND MAXIMUM TEMPERATURE ALARM ....................................................................................................67
8.3.3. END OF DEFROST DUE TO TIMEOUT ALARM..............................................................................................................68
8.3.4. EXTERNAL ALARM ............................................................................................................................................................68
8.3.5. DOOR OPEN ALARM........................................................................................................................................................69
8.3.6. PRESSURE SWITCH INPUT ALARM .................................................................................................................................70
8.3.7. PANIC ALARM ...................................................................................................................................................................70
8.3.8. REFRIGERANT LEAK ALARM............................................................................................................................................71
9. MODBUS MSK 554 FUNCTIONS AND RESOURCES .................................. 72
9.3.1. DATA FORMAT (RTU) ........................................................................................................................................................72
9.3.2. NETWORK..........................................................................................................................................................................72
9.3.3. MODBUS COMMANDS AVAILBLE AND DATA AREAS ................................................................................................73
9.3.4. ADDRESS CONFIGURATION...........................................................................................................................................73
9.3.5. PARAMETER VISIBILITY AND VALUES ............................................................................................................................74
9.3.6. MODBUS TABLES..............................................................................................................................................................74
9.3.7. PARAMETER/VISIBILITY TABLE........................................................................................................................................76
9.3.8. PARAMETER/VISIBILITY H60 TABLE................................................................................................................................80
9.3.9. FOLDER VISIBILITY TABLE................................................................................................................................................82
9.3.10. CLIENT TABLE..................................................................................................................................................................82
10. ADVANCED FUNCTIONS - NIGHT AND DAY ........................................... 84
10.1. DAY/NIGHT REGULATOR OPERATION .......................................................................... 84
10.2. OPERATION WITH DEFROST GROUP ............................................................................ 85
10.3. DAY/NIGHT REGULATOR DURING A BLACKOUT........................................................... 85
10.4. OPENING FOLDER NAD - DAY/NIGHT........................................................................... 86
11. ADVANCED FUNCTIONS - HACCP .......................................................... 87
11.1. DISPLAYING HACCP ALARMS ....................................................................................... 88

EWRC 300/500 NT
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1.1. GENERAL DESCRIPTION
Using a single device, controllers in the new Coldface NT series are able to manage all the functions of a static or
ventilated cold room.
With its innovative design, the casing combines ease of installation, water resistance and the possibility of installing
a power contactor or a magnetothermal switch. Controllers in the Coldface NT series are easy and intuitive to use
thanks to the high-visibility double display, the light-up icons and the four large keys for direct access to the functions.
The controllers are available with a series of advanced functions, such as the recording of HACCP events with a yearly
calendar.
1.2. ADVANTAGES AND FEATURES
• Complete management of a static or ventilated cold room
• Innovative design for easy installation and use
• Intuitive navigation with most frequently used parameters
• Large high-visibility display
• Facility for housing accessories on DIN rail
1.3. MODELS
Controllers in the new Coldface series allow you to control the temperature of a static or ventilated cold room with
single-phase compressors up to 2HP.
They are suited to the control of commercial and industrial cold rooms and, thanks to the wide range of outputs
available,
provide control of all associated functions, including lights, alarms, and condensation fans.
The products are equipped with an optional RS-485 serial port, which enables connection to TelevisSystem and
ModBUS without the need for external accessories.
The controllers offer simple and intuitive operation: the LED double display, with 6 navigation keys,
ensures the clear and simultaneous display of all active functions.
The HACCP function sets, maintains and memorises temperature measurements and any associated alarms, ensuring
the quality and hygiene of stored products.
• EWRC 300 NT - Versions with 3 configurable relays for controlling al the accessory loads in the room.
• EWRC 500 NT - Versions with 5 configurable relays for controlling all the accessory loads in the room.
• EWRC 500 NT HACCP - Versions with 5 configurable relays for controlling all the accessory loads in the room,
HACCP function with clock and yearly calendar.
• EWRC 500 NT 4DIN - Versions with 5 configurable relays for controlling all the accessory loads in the room, plus
door for installation of magneto-thermal switch or accessories on a DIN rail.
• EWRC 500 NT 4DIN HACCP - Versions with 5 configurable relays for controlling all the accessory loads in the
room, HACCP function with clock and yearly calendar, plus door for installation of magneto-thermal switch or ac-
cessories on a DIN rail.
• EWRC 500 NT BREAKER - Versions with 5 configurable relays for controlling all the accessory loads in the room,
plus door and magneto-thermal switch installed.
• EWRC 500 NT 4DIN BREAKER HACCP - Versions with 5 configurable relays for controlling all the accessory loads
in the room, HACCP function with clock and yearly calendar, plus door and magneto-thermal switch installed.
1. INTRODUCTION

EWRC 300/500 NT
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2. TECHNICAL DATA
2.1. TECHNICAL SPECIFICATIONS (EN 60730-2-9)
Front panel protection rating IP65
Classification: EWRC NT 500 with plastic knockout removed and no breaker installed:
Electronic and automatic device (non-safety) to be incorporated.
Other:
electronic automatic control device (not safety) device for stand-alone installation
Mounting: wall-mounted (hole spacing A-B 116 mm; C-D 87 mm; A-C 235 mm)
Type of action: 1.B
Pollution class: 2
Material class: IIIa
Over-voltage category: II
Nominal pulse voltage: 2500 Vac
Operating temperature: -5 … 50 °C
Storage temperature: -20 … 85 °C
Operating humidity: 10 … 90 %
Storage humidity: 10 … 90 %
Power supply: 230 Vac ±10% 50/60 Hz
Power consumption: 11 VA max
Magneto-thermal switch: Model EWRC 500 BREAKER
230 Vac Icn 4500 A, Two-pole, for cables up to 10 mm2
Magneto-thermal switch rated current: Model EWRC 500 BREAKER
In = 16 A
Nominal pulse voltage: Model EWRC 500 BREAKER
4 KV
Connection: device on external flexible cable, Y type connection
Digital outputs (relay): refer to the label on the device
Fire resistance category: D
Software class: A
Ball test temperature: 100 °C
RTC battery life: Without any external power supply, the clock battery will last 4 days.
2.2. FURTHER INFORMATION
2.2.1. INPUT CHARACTERISTICS
Measurement range: NTC: -50.0 ... 110 °C; (on 3-digit display with +/- sign)
PTC: -55.0 ... 150 °C; (on 3-digit display with +/- sign)
Accuracy: 0.5 % f.s + 1 digit
Resolution: 0.1 °C
Buzzer: YES
Analogue Inputs: 3(2) configurable NTC/PTC inputs
Digital Inputs: 2(3) multi-function, voltage-free digital inputs (DI)
NTC PTC
Measurement range -50.0 ... 110 °C
-58.0 ... 302 °F
-55.0 ... 150 °C
-67.0 ... 302 °F
Resolution 0.1 °C
0.1 °F
0.1 °C
0.1 °F
F.S. precision 0.5 % f.s. + 1 digit 0.5 % f.s. + 1 digit
Impedanc e - -
* probes not included - contact the Eliwell Sales Office for accessories

EWRC 300/500 NT
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2.2.2. OUTPUT CHARACTERISTICS
Digital Outputs: OUT1common-line output 2HP 12(12) A 250 Vac
OUT2common-line output 1HP 8(8) A 250 Vac
OUT3common-line output 1/2HP 8(4) A 250 Vac
EWRC500 NT model only OUT4common-line output 1HP 8(8) A 250 Vac
EWRC500 NT model only OUT5SPDT output 1/2HP 8(4) A 250 Vac
Common-line max 18 A
2.2.3. MECHANICAL CHARACTERISTICS
Casing: PC+ABS
Dimensions: front panel 213x318 mm, depth 102 mm
Dimensions: Model EWRC 500 BREAKER
front panel 221x318 mm depth 107 mm
Terminals: screw
• Probe and digital inputs, OUT5relay: screw-on terminals pitch 5.01:
electric cables of 2.5 mm2maximum cross-section
(one wire per terminal in the case of power connections).
• Power supply and OUT1..OUT4relays: screw-on terminals pitch 7.62:
electric cables of 4 mm2maximum cross-section
(one wire per terminal in the case of power connections).
Connectors: TTL for Unicard / MFK / CopyCard / Device Manager connection (via DMI)
Humidity: Operation / Storage: 10...90 % RH (non-condensing)
2.2.4. FOOD SAFETY
The device conforms to
Standard EN13485 as follows: - Suitable for storage.
- Application: air.
- Climate range A.
- Measurement class 1 in the -25 ... 15 °C range (*).
(* exclusively using Eliwell probes)
NOTE: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer to the
instrument alone and not to any accessories provided, such as the probes.
This means, for example, that the error introduced by the probe must be added to the characteristic error of the instrument.
2.3. DISPOSAL
The equipment (or product) must be subjected to separate waste collection in compliance with the local legislation on waste
disposal.

EWRC 300/500 NT
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3. CONNECTIONS
3.1. GENERAL WARNINGS
IMPORTANT!
Make sure the appliance is switched off before working on the electrical connections.
All operations must be carried out by qualified personnel.
To ensure proper connections, comply with the following:
• Power supplies other than those specified can seriously damage the system.
• Use cables of suitable cross-section for the terminals
• The device is equipped with screw terminals (a single conductor per terminal for the power feeding connections): refer to the
label on the instrument for details of the terminal ratings.
• When current exceeds 8 A on relay outputs, 2 x 2.5 mm2cables must be run out for each individual contact to ensure the
temperature of the cables does not exceed 85 °C.
• Separate the cables of probes and digital inputs from inductive loads and dangerous voltage connections to prevent any
electromagnetic interference. Do not place the probe cables near other electrical equipment (switches, meters, etc.)
• Make connections as short as possible and do not wind them around electrically connected parts.
• To avoid causing static discharges, do not touch the electronic components on the boards.
3.1.1. POWER SUPPLY - DANGEROUS VOLTAGE OUTPUTS (RELAY)
Do not exceed the maximum permitted current; for higher loads, use a contactor with sufficient power capacity.
Important!
Make sure that power supply is of the correct voltage for the instrument.
3.1.2. ANALOGUE INPUTS-PROBES
Temperature probes have no connection polarity and can be extended using a normal bipolar cable (note that the extension of the
probes influences the instrument's EMC electromagnetic compatibility and measurement class: take great care with the wiring).
3.1.3. SERIAL CONNECTIONS
The controller can be connected to TelevisSystem remote control systems by a direct RS-485 connection using the RS485 optional
plug-in module.
3.1.4. RS485 CONNECTION
Use a shielded and "twisted" cable with two 0.5 mm2conductors, plus braiding (i.e. Belden cable model 8762 with PVC sleeve,
2conductors plus braiding, 20 AWG, nominal capacity between conductors 89 pF, nominal capacity of 161 pF between conductor
and shielding).
See standards relating to EN 50174 data transmission systems for indications on how to lay cables.
Extra care must be taken in separating data transmission circuits from power lines.
An RS-485 network up to 1200 m in length featuring a maximum of 32 devices can be connected straight to the controller.
This length can be extended and the number of devices for each channel increased using appropriate repeater modules.
Attach the 120 Ω 1/4 W resistors between the "+" and "-" terminals on the interface and the last controller in each branch of the
network.
3.1.5. TTL CONNECTION
Use a 5-wire TTL cable up to 3 m in length.
An Eliwell-supplied TTL cable is recommended. Contact Eliwell Sales Office for item availability.

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Pg. 9/89
3.2. WIRING DIAGRAM
18 19 20 2117
EWRC300/500 NT
161514131211109
UNICARD
COM
NONC
N
L
EWRC 500NT
only
OUT1 OUT2 OUT3 OUT4 OUT5
H21
230V~
H22 H23 H24 H25
COPY CARD
MFK
Yellow cable
DISPLAY
RS485
OPTIONAL
ELIWELL
ELIWELL
18A max
GND GND GND+ +
1 2 3 4 5 6 7 8
PB1 PB2 DI2 DI1
+
+
PB3/DI3
3.2.1. TERMINALS
TERMINALS
1, 5, 8 GND 9, 10 LINE/NEUTRAL. Power supply
2Analogue input Pb1 11 N.O. OUT1
3Analogue input Pb2 12 NEUTRAL
4Analogue input Pb3 / Digital input DI3 13 N.O. OUT2
6Digital input DI2 14 NEUTRAL
7Digital input DI1 15 N.O. OUT3
CARD TTL for connection to UNICARD / CopyCard 16 NEUTRAL
RS485 Plugin module for connection to
TelevisSystem / Modbus (optional) 17 N.O. OUT4
18 NEUTRAL
19 N.C. OUT5
20 OUT5 Common terminal
21 N.O. OUT5

EWRC 300/500 NT
Pg. 10/89
3.3. WIRING DIAGRAM FOR MODELS WITH MAGNETO-THERMAL SWITCH
INSTALLED
18 19 20 2117
EWRC500 NT BREAKER
161514131211109
COM
NONC
OUT1 OUT2 OUT3 OUT4 OUT5
H21 H22 H23 H24 H25
N
L
230V~
18A max
GND GND GND+ + +
1 2 3 4 5 6 7 8
PB1 PB2 DI2 DI1
+
PB3/DI3
3.3.1. TERMINALS
TERMINALS
1, 5, 8 GND 9, 10 LINE/NEUTRAL. Power supply
2Analogue input Pb1 11 N.O. OUT1
3Analogue input Pb2 12 NEUTRAL
4Analogue input Pb3 / Digital input DI3 13 N.O. OUT2
6Digital input DI2 14 NEUTRAL
7Digital input DI1 15 N.O. OUT3
CARD TTL for connection to UNICARD / CopyCard 16 NEUTRAL
RS485 Plugin module for connection to
TelevisSystem / Modbus (optional) 17 N.O. OUT4
18 NEUTRAL
19 N.C. OUT5
20 OUT5 Common terminal
21 N.O. OUT5

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4. MECHANICAL INSTALLATION
4.1. MECHANICAL INSTALLATION
Do not install the device in damp and/or dirty areas; it is intended for use in sites with ordinary or normal levels of pollution. Keep the
area around the instrument cooling slots adequately ventilated.
4.1.1. WALL-MOUNTING
1. Remove the screws (self-tapping 3.5x32 TC head) securing the cap at the top and then open the cover.
2. Drill holes for the high and low voltage cable glands on the sides of the backplate, as shown in the figure. Check that the cables
are inside the box. Use suitable cable glands and/or conduit glands that guarantee an airtight seal for all wiring
3. Drill 4 holes (see A...D) in the wall and fix the backplate in place using 4 screws (not supplied) suited to the wall thickness.
4. Insert plug covers TDI 20 (accessory available on request).
5. Close the door and re-tighten the 4 cover screws, making sure that the hinges are flush and do not interfere with the closure of
the cover.
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.
Door opening and removal of barriers for DIN module installation
The versions with front door allow direct access to the switch miniature circuit breaker or to the top of the device installed
on the DIN rail mounted inside.
To open the door, use both hands as shown in the figure. Apply a slight pressure with your thumbs on top to release the
side flaps. 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 wiring diagram is illustrated in the figure on the previous page.
In versions with transparent front door, the omega DIN rail is always available and already installed.
You can mount up to a maximum of 4 DIN modules, including 2DIN miniature circuit breaker when present.
The DIN housing is easily expandable from 2 to 4 DIN exploiting the pre-drilling barriers as shown in the figure top right.
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.
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 protec-
tion against this risk.
Failure to follow these instructions will result in death or serious injury.

EWRC 300/500 NT
Pg. 12/89
Removing the cover
Wall installation
A B
CD
116
[UM] mm
87
235

EWRC 300/500 NT
Pg. 13/89
110
6.5
29
60
25
45
Lower Side
MM [mm]

EWRC 300/500 NT
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5. USER AND START-UP INTERFACE
5.1. DISPLAY
5.1.1. KEYS
B
A
C
F
E
D
%RH
No. KEY press and release press and hold for about
3seconds NAVIGATION MENU Notes
AESC key
Defrost • Functions menu • Manual defrost • Return to Main Menu • Output Congurable - see parameter H33
BpUP
Alarms • Alarms Menu (always visible) / • Scroll
• Increase values
HACCP alarms
only in certain models and if available
C SET
• Display SetPoint / probe values /
time (Models with clock only)
• Conrm values
• Access value edit mode
(upper display blinking)
Access Parameters menu • Conrm values
• Move right Time only visible on models with clock
DqDOWN
AUX
system INFO
See Technical Support Activate auxiliary function • Scroll • Decrease values Congurable - see parameter H32
E ON/OFF / On/O
device / Congurable - see parameter H34
F LIGHT Switch light on/o Switch light on/o / Congurable - see parameter H35

EWRC 300/500 NT
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5.1.2. LEDS
1
%RH
2 3 4 5 6 7 8
17
18
19
9
10
11
12
13
14
15
16
Meaning of LEDS:
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
O
LED Buzzer
ALARM Red SEE "ALARM CAUSE/EFFECT TABLE" on page 64”
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.
No. LED Colour ON BLINKING 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

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5.1.3. PRELIMINARY CONFIGURATIONS
After making the electrical connections, simply power up the device to start operation.
At first start-up, Eliwell recommends that you:
1. Make sure the instrument is powered (green POWER SUPPLY LED on).
2. Make sure the display is working: when the controller is powered up it performs a lamp test, during which time the display
and LEDs will blink for several seconds to ensure that they all function correctly.
3. Make sure there are no active alarms (ALARM / HACCP ALARM LEDs off and labels E1, E2 and E3 not displayed).
4. Configure the main parameters listed in the USER menu to suit your requirements, as described below.
5.1.4. 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 detected 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 protec-
tion*.
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 for defrosting are not present, (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 timeout based on the parameter dEt (default 30 min).
EVAPORATOR FANS
Relay OUT3 is configured as fans relay and is activated in the required cases, according to delays and parameter settings*.
Default fan settings
dt = 0 min. dripping time
dFd = Y. Fans off during defrosting.
LIGHT - EWRC 500 NT only
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 stand-by*.
ALARM RELAY - EWRC 500 NT only
Relay OUT5 is configured as alarm relay and is activated in the case of alarms, according to delays and parameter settings.

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5.1.5. NAVIGATION
Manual
defrost
Display HACCP alarms
if function active
Display alarms
if active
Functions Menu
LOC keypad lock Info
System
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 diF
2.0
CPr
- - -
modify
value
conrm with
diF
2.0
Turns light on/o
Turns instrument
on / o
Parameters
SetPoint & Probes
rSE activate reduced Set
rHC reset HACCP alarms
rEd disable HACCP
rPA Pressure switch alarms

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5.1.6. FUNCTIONS MENU AND KEY-ACTIVATED FUNCTIONS
The Functions menu is used to perform a number of manual functions such as putting the device into stand-by, clearing pressure
switch interventions and clearing HACCP alarms, etc.
Access the Functions menu by pressing the ESC key.
The following table lists the functions, which are all OFF by default.
Display Function Description
LOC
OFF Keypad lock
The UP/ES/ON-OFF/LIGHT keys and the functions programmed via
keys are locked
The DOWN key may be used to view the Setpoint only; the value
cannot be modified
Only function visible if keypad locked (On)
rEd
OFF
Disable
HACCP alarm
recording
Disables HACCP alarm recording
rPA
OFF
Reset pressure switch
alarm
Clears pressure switch alarm
NOTE: the function reverts to OFF status when you exit the Functions
Menu
rSE
OFF
Reduced set (Economy
setpoint) Reduced set (Economy setpoint)
rHC
OFF Reset HACCP alarms Clears HACCP alarms
May be protected by Password PA3
All models have the UP key set to display the Alarms Menu.
All models also allow the setting of other keys to activate a specific function as identified by the client.
The parameters for configuring the two keys are:
• H32 = DOWN key configuration
• H33 = ESC key configuration
• H34 = ON/OFF key configuration
• H35 = LIGHT key configuration
The values that can be set apply to these keys and the functions that can be activated are:
Value of
H32/H33/H34/H35 Function enabled
0 = Disabled
1 = Defrost
2 = Auxiliary
3 = Activate economy setpoint
4 = Reset HACCP alarms
5 = Disable HACCP alarms
6 = Light
7 = Stand-by
8 = NOT USED
9 = Evaporator fans ON
10 = Activate / deactivate Frame Heater relay
11 = Enable/disable Night And Day functions
12 = Deep cooling cycle
13 = Clear voltage drop errors
(Power Failure Reset)
14 = Service stoppage
15 = Activate economy set + Night And Day

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5.1.7. PASSWORD
Password PA1 is disabled by default.
Password PA1: allows access to User parameters.
To enable it (PA1≠0): press and hold set for at least 3 seconds. The label USr appears. Press set again.
Scroll through the parameters using UP and DOWN until you find label PA1, press SEt to display its value, change it using UP and
DOWN and save it by pressing set or ESC.
Example with password enabled (PA1≠0) it will then be requested before access to the User parameters is granted.
Display Description
-17.8
-18.0 Press SET for 3 seconds
USr
PA1 Label PA1 appears
PA1
0
Press SET
Use UP and DOWN keys to enter the password
PA1
12
Example the password is 12
Press SET
diF
2.0
User menu accessed
The first User parameter appears
If the value entered is incorrect, label PA1 will be shown
again and the procedure must be repeated.
Password "PA2": allows access to Installer parameters.
The example is the same. N.B. Password PA2 is set by default to 15
Display Description
-17.8
-18.0 Press SET for 3 seconds
USr
PA1
Label USr appears
Use 'UP' and 'DOWN' to search for InS

EWRC 300/500 NT
Pg. 20/89
Display Description
inS
PA2 Press SET
PA2
0Use UP and DOWN keys to enter the password
PA2
15
Example the password is 15
Press SET
CPr
---
installer menu accessed
the first CPr folder appears
If the value entered is incorrect, label PA2 will be shown
again and the procedure must be repeated.
5.1.8. SETTING THE SETPOINT
By way of example, we will change the Setpoint value from -18.0 degrees centigrade to -20.0 degrees centigrade.
Display Description
-17.8
-18.0 Press and release the SET key
SEt
-18.0
The upper display will show SEt, the lower display will
indicate the current SetPoint value
Press and release the SET key once more
SEt
0.0
The upper display will show SEt blinking
Use the UP & DOWN keys to adjust the SetPoint value
SEt
-20.0
Press the ESC key several times to return to the normal
display
(or press the SET key to confirm, followed by ESC to exit)
-17.8
-20.0
The new Setpoint value is saved and appears on the
lower display