Eliwell EWKPlus 978, EWPlus 978 User Manual

Reduced SET / Economy LED

Permanently on: Energy Saving active Flashing: reduced setpoint active Quick flashing: access to level2 parameters Off: in all other cases

Fans LED

Permanently on: fans active Off: in all other cases

Compressor LED

Permanently on: compressor active Flashing: delay, protection or activation

blocked

Off: in all other cases

Defrost LED

Permanently on: output active Flashing: activated manually or from DI Off: in all other cases

Alarms LED

Permanently on: alarm active Flashing: alarm acknowledged Off: in all other cases

Aux LED

Permanently on: Aux output active Flashing: Deep cooling Cycle active Off: Aux output not active

°C LED

Permanently on: °C setting (dro = 0) Off: in all other cases

°F LED

Permanently on: °F setting (dro =1) Off: in all other cases

EWPlus 978 - EWKPlus 978

Electronic controllers and keyboards for refrigeration units

NOTE

When the instrument is powered on it performs a lamp test, during which time the display and LEDs will flash for several seconds to check that they all function correctly.

USER INTERFACE

set

Press and release

Scroll through menu options Increase values

Hold down for at least 5 sec User-configurable function (see parameter H31)

DOWN

Press and release

Scroll through menu options Decrease values

Hold down for at least 5 sec User-configurable function (see parameter H32)

STANDBY (ESC)

Press and release

Return to the previous menu level Confirm parameter value

Hold down for at least 5 sec User-configurable function (see parameter H32)

SET (ENTER)

Press and release

Display alarms (if present) Open Machine Status menu

Hold down for at least 5 sec Open Programming menu Confirm commands

KEYS

EWPlus 978 - EWKPlus 978

10 23 6745

TTL

PLUS

978

Supply

230Va 4.5W

Max 12A

D.I.2

D.I.1

Pb1

Pb2

Pb3

A C D B

AUX

H21 H23 H24 H22

EWPlus 978 TERMINALS - AP2

N-L

Supply voltage 230Va

6-7

Power input 230Va (Supply)

3-0 N.O. Relay Compressor

(A - ) - Parameter H21

8-10 Probe Pb2

3-1 N.O. Relay Defrost2

(C - ) - Parameter H23

9-10 Probe Pb1

3-2 N.O. Relay AUX

(D -

AUX

) - Parameter H24

11-10

D.I.1 (H11≠0 and H43=n) or Probe Pb3 (H11=0 and H43=y)

3-4 N.O. Relay Defrost

(B -

) - Parameter H22

TTL TTL Input or Digital Input 2 (H12≠0)

3-5 N.C. Relay Defrost

NOTE: for relay and power supply capacities, contact the Sales Office.

EWPlus 978 CONNECTIONS

EWPlus 978 - EWKPlus 978

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F = Functions H = Inputs and Outputs R = Relay Output

EWPlus 978 - EWKPlus 978

AP1 AP2 AP3

F - End of defrost due to timeout X X X T - End of defrost due to temperature X X X F - Pb1 alarm X X X F - Pb3 alarm (Evaporator 2) X X H - Pb1 present X X X H - Pb2 present X X X H - Pb3 / D.I.1 enabled Pb3 Pb3 R - Compressor X X X R - Defrost X X R - Evaporator 2 defrost X X R - Fans X R - Alarm X (2) R - AUX X X

RESET PROCEDURE

EWPlus 978 and EWKPlus 978 instruments can be RESET and the default factory settings restored in a simple and user-friendly way.

Simply reload one of the basic applications by following the procedure described in the paragraph "Loading default applications".

You may need to RESET the instrument in special circumstances in which the normal operation of the instrument is compromised or if you decide to restore the instrument to its default configuration (e.g. AP1 values).

! IMPORTANT!: This operation resets the instrument to its initial state, returning all the parameters to their default

factory values. This means that all changes made to operating parameters will be lost.

3 4

TTL

EWK

PLUS

978

Supply

4.0W

D.I.1

Pb1

Pb2

Pb3

EWKPlus 978 TERMINALS

N-L

Supply voltage 115Va or 230Va

8-10 Probe Pb2

3-4

Power input 115Va or 230Va (Supply)

9-10 Probe Pb1

TTL TTL Input 11-10

D.I.1 (H11≠0 and H43=n) or Probe Pb3 (H11=0 and H43=y)

EWKPlus 978 CONNECTIONS

LOADING DEFAULT APPLICATIONS

The procedure for loading one of the default applications is:

• at power-on of the device, keep the

set

key pressed: the label “AP1” will appear;

• browse the various applications (AP1-AP2-AP3) using the and keys;

• select the desired application using the

set

key (“AP3” in the example) or cancel the procedure by pressing the key;

alternatively wait for the timeout;

• if the operation is successful, the display will show "y", if not it will show "n";

• after a few seconds the instrument will return to the main display.

set

Power-on +

set

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ACCESSING AND USING THE MENUS

The resources are organised into 2 menus which are accessed as follows:

• “Machine Status” menu: press and release the

set

key.

• “Programming” menu: hold down the

set

key for 5 seconds. Either do not press any keys for 15 seconds (timeout) or press the key once, to confirm the last value displayed and return to the previous screen.

“MACHINE” STATUS MENU

Access the “Machine Status” menu by pressing and releasing the

set

key. If no alarms are active, the “SEt” label appears.

By pressing the and keys you can scroll through all the folders in the menu:

set

- AL: alarms folder (only visible if an alarm is active);

- SEt: setpoint configuration folder;

- Pb1: probe 1 - Pb1 folder;

- Pb2: probe 2 - Pb2 folder - Pb2*;

- Pb3: probe 3 - Pb3 folder- Pb3**; * folder displayed if Pb2 present (H42 = y) ** folder displayed if Pb3 present (H11 = 0 and H43 = y)

NOTE: If “REDUCED SET” (H11 or H12 = ±2) is active, the value normally displayed is the one contained in the Setpoint folder and will correspond to (SEt + OSP). In all other cases, the displayed value will be SEt.

PROGRAMMING THE SETPOINT: To display the Setpoint value press the

set

key when the “SEt” label is displayed. The Setpoint value appears on the display. To change the Setpoint value, press the and keys within 15 seconds. Press

set

to confirm the modification.

set

SETPOINT EDIT LOCK: The keypad can be locked by programming the “LOC” parameter. With the keypad locked you can still access the “Machine Status” menu by pressing

set

to display

the Setpoint, but you cannot edit it. To disable the keypad lock, repeat the locking procedure.

PROBES DISPLAY: When the label Pb1, Pb2 or Pb3 is displayed, press

set

and the associated probe value will

appear. NOTE: 1) the value cannot be modified.

PASSWORDS

Password PA1: allows access to the “User”parameters. By default the password is disabled (PS1=0). To enable it (PS1≠0): press and hold

set

for longer than 5 seconds, scroll through the parameters using and until you

see the label PS1, press

set

to display the value, modify it using and , then save it by pressing

set

or .

If enabled, it will be required in order to access the User parameters.

Password PA2: allows access to the “Installer”parameter. By default the password is enabled (PS2=15). To modify it (PS2≠15): press and hold

set

for longer than 5 seconds, scroll through the parameters using and until you

see the label PA2, press

set

, set the value “15” using and , then confirm using

set

. Scroll through the folders until you

see the label diS and press

set

to enter. Scroll through the parameters with and until you see the label PS2, press

set

to display the value, modify it using and , then save it by pressing

set

or .

The visibility of PA2 is:

1) PA1 e PA2 ≠ 0: Press and hold

set

for longer than 5 seconds to display PA1 and PA2. You can then decide whether to access

the “User” parameters (PA1) or the “Installer” parameters (PA2).

2) Otherwise: Password PA2 is amongst the level1 parameters. If enabled, it will be required when accessing the “Installer” parameters; to enter it, proceed as instructed for password PA1.

NOTE: If the entered value is incorrect, the label PA1/PA2 will be displayed once again and the procedure must be repeated.

PROGRAMMING MENU

To access the "Programming" menu hold down the

set

key for longer than 5 seconds. If enabled, the instrument will request an

access PASSWORD, either PA1 for “User” parameters or PA2 for “Installer” parameters (see “PASSWORD” section).

“User” parameters: When accessed the display will show the first parameter (e.g. “diF”). Press and to scroll through all of the parameters in the current level. Select the desired parameter by pressing

set

. Press and to change it and

set

save the changes.

“Installer” parameters: When accessed the display will show the first folder (e.g. “CP”). Press and to scroll through all of the folders in the current level. Select the desired folder using

set

. Press and to scroll through the parameters in the

current folder and select the parameter using

set

Press and to change it and

set

to save the changes.

NOTE: It is strongly recommended that you switch the device off and on again each time the parameter configuration is

changed, in order to prevent malfunctioning of the configuration and/or ongoing timings.

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MANUAL DEFROST CYCLE ACTIVATION

Hold down the key for longer than 5 seconds. It is only activated if the temperature conditions are fulfilled. Otherwise, the display will blink 3 times to indicate that the operation will not be performed.

INSTRUMENT ON/OFF

The instrument can be switched off by pressing the key for longer than 5 seconds. In this condition, the adjustment algorithms and defrost cycles are disabled and the text “OFF” will appear on the display.

DIAGNOSTICS

Alarms are always indicated by the buzzer (if present) and the alarm icon . To switch off the buzzer, press and release any key, the relative icon will continue to flash. NOTES: If alarm exclusion times have been set (see “AL” folder in the parameters table) the alarm will not be signalled.

- E1: if the cold room probe fails (Pb1), the indication “E1” will appear on the display.

- E2: if the Evaporator probe fails (Pb2), the indication “E2” will appear on the display.

- E3: if the Evaporator 2 probe fails (Pb3), the indication “E3” will appear on the display.

AUTOMATIC DEEP COOLING CYCLE - DCC

On activation of DCC (Deep Cooling Cycle), the compressor regulator will regulate in relation to the setpoint dCS, with a differential equal to the value diF; the interval between defrosts is reset to zero and defrosts are disabled.

If tdC = 0, DCC will end when the setpoint dCS is reached. If tdC ≠ 0, DCC will end after a time set in parameter tdC.

dCS

SEt

Sid

°C

SEt

dCS

toS

OFF

USING THE UNICARD/COPYCARD

The Unicard/Copycard must be connected to the TTL serial port and allows the rapid programming of instrument parameters. Access the “Installer” parameters by entering PA2, scroll through the folders using and until folder FPr is displayed. Select it using

set

, scroll through the parameters using and and select the function using

set

(e.g. UL).

• Upload (UL): select UL and press

set

. This function uploads the programming parameters from the instrument to the card.

If the operation is successful, the display will show “y”, otherwise it will show “n”.

• Format (Fr): This command is used to format the Unicard/Copycard (which is necessary when using the card for the first time).

IMPORTANT: the Fr parameter deletes all data present. This operation cannot be reversed.

• Download: Connect the Unicard/Copycard when the instrument is switched off. At power-on, data will automatically start downloading from the Unicard/Copycard to the instrument. At the end of the lamp test, the display will show “dLy” if the operation was successful and “dLn” if not.

NOTE: After the download, the instrument will use the newly uploaded map settings.

UPLOAD

DOWNLOAD

MOUNTING - DIMENSIONS

The device is designed for panel mounting. Drill a 29x71 mm hole and insert the instrument; secure it with the special brackets provided. Do not install the device in places subject to high humidity and/or dirt; it is intended for use in sites with ordinary class of pollution. Keep the area around the instrument cooling slots adequately ventilated.

74 mm

32 mm

29 mm

71 mm

70 mm

59 mm

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ALARMS

Label Fault Cause Effects Remedy

Probe1 faulty

(cold room)

• measured values outside operating range

• probe faulty / short-circuit / open-circuit

• Label E1 displayed

• Alarm icon permanently on

• Controller disabled max/min alarms

• Compressor operation based on parameters "Ont" and "OFt".

• check probes wiring

• replace probe

Probe2 faulty

(defrost)

• measured values outside operating range

• probe faulty / short-circuit / open-circuit

• Label E2 displayed

• Alarm icon permanently on

• Defrost will end due to timeout (dEt)

• The evaporator fans will be: ON if the compressor is ON and will operate based on parameter FCO if the compressor is OFF.

• check probes wiring

• replace probe

Probe3 faulty

(evaporator 2)

• measured values outside operating range

• probe faulty / short-circuit / open-circuit

• Label E3 displayed

• Alarm icon permanently on

• check probes wiring

• replace probe

AH1

Pb1 HIGH

temperature alarm

• value read by probe Pb1 > HAL after

time “tAO”. (see “MAX/MIN TEMP. ALARMS”)

• Label AH1 recorded in folder AL

• No effect on control

• Wait for temperature value read by Pb1 to return below HAL.

AL1

Pb 1 LOW

temperature alarm

• value read by probe Pb1 < HAL after time “tAO”. (see “MAX/MIN TEMP. ALARMS”)

• Label AL1 recorded in folder AL

• No effect on control

• Wait for temperature value read by Pb1 to return above LAL.

EA External alarm

• digital input activated

(H11 = ±5)

• Label EA recorded in folder AL

• Alarm icon permanently on

• Regulation blocked if rLO = y

• check and remove external cause of alarm on D.I.

OPd Door open alarm

• activation of digital input

(H11 = ±4) (for a time greater than tdO)

• Label Opd recorded in AL folder

• Alarm icon permanently on

• Regulator locked if dOd ≠ 0

• close the door

• delay function defined by OAO

Ad2 Defrost due to timeout

• End of defrost cycle due to timeout rather than due to defrost end temperature being read by Pb2.

• Label Ad2 recorded in AL folder

• Alarm icon permanently on

• Wait for the next defrost cycle for automatic reset.

COH Overheating alarm

Pb3 exceeded the value set by parameter SA3.

• Label COH displayed

• Alarm icon permanently on

• Regulation locked (Compressor)

• wait for the temperature to return to a value of

SA3 (Setpoint) minus dA3 (differential).

nPA General pressure alarm

Activation of pressure switch alarm by general pressure switch.

If the number N of pressure switch activations is N<PEn:

• Folder nPA recorded in folder AL with the

number of pressure switch activations

• Regulation locked (Compressor and Fans)

• check and remove the cause which triggered the alarm on D.I. (Auto Reset).

PAL General pressure alarm

Activation of pressure switch alarm by general pressure switch.

If the number N of pressure switch activations is N=PEn:

• Label PAL displayed

• Label PA recorded in AL folder

• Alarm icon permanently on

• Regulation locked (Compressor and Fans)

• Switch the device off and back on again

• Reset alarms by entering the functions folder and selecting the rAP function (Manual Reset)

Communication

Missing Alarm

(only EWKPlus 978)

The controller has not received any Modbus message during StO time since it has been lighted on or since the last message (only if StO ≠ 0).

• Label nL displayed

• Alarm icon permanently on

• Check the network connection.

Temperature value

relative to setpoint value (Att=1)

Absolute temperature

value (Att=0)

Minimum temperature alarm Temp. ≤ Set + LAL * Temp. ≤ LAL (LAL with sign)

Maximum temperature alarm Temp. ≥ Set + HAL ** Temp. ≥ HAL (HAL with sign)

Reset from minimum temperature alarm condition

Temp. ≥ Set + LAL + AFd or ≥ Set - ILALI + AFd (LAL < 0)

Temp. ≥ LAL + AFd

Reset from maximum temperature alarm condition Temp. ≤ Set + HAL - AFd (HAL > 0) Temp. ≤ HAL - AFd

* If LAL is negative, Set + LAL < Set * If HAL is negative, Set + HAL < Set

MAX/MIN TEMPERATURE ALARMS

LAL

AFd

HAL

AFd

LAL + AFd

HAL - AFd

Setpoint - LAL

AFd

Off

Setpoint + HAL

AFd

Setpoint - LAL + AFd

Setpoint + HAL - AFd

Setpoint

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TECHNICAL SPECIFICATIONS (EN 60730-2-9)

Classification: operating (not safety) device for incorporation Mounting: panel mounting with 71x29 mm (+0.2/-0.1 mm) drilling template. Type of action: 1.B Pollution class: 2 Material class: IIIa Overvoltage category: II Nominal pulse voltage: 2500V Temperature: Use: –5 … +55 °C - Storage: -30 … +85 °C Power supply: EWPlus 978: 230Va (±10%) 50/60 Hz EWKPlus 978: 115Va (±10%) 50/60 Hz or 230Va (±10%) 50/60 Hz Power consumption: EWPlus 978: 4,5W max EWKPlus 978 (115Va and 230Va): 4,0W max Digital outputs (relay): refer to the label on the device Fire resistance category: D Software class: A

NOTE: check the power supply rating on the device’s label; contact our Sales Office for power and relay ratings.

FURTHER INFORMATION

Input Characteristics

Display range: NTC: -50.0°C ... +110°C (on 3-digit display with +/- sign) Accuracy: Better than 0.5% of full-scale +1 digit. Resolution: 0.1 °C Buzzer: NO Analogue Inputs: 2 NTC* Digital Inputs: EWPlus 978: 2 voltage-free digital inputs (D.I.1 and D.I.2) EWKPlus 978: 1 voltage-free digital input (D.I.1)

NOTE: - (*) D.I.1 can also be configured as a probe input (H11 = 0 e H43 = y)

- D.I.2, if activated, should be connected to terminals 1-2 of the TTL connector (H12≠0)

Output Characteristics

Digital Outputs (only EWPlus 978): 1 Compressor relay (A) : IEC 60730-1 10(6)A max 250Va UL60730 (A) 1.5Hp (10FLA - 60LRA) max 240Va 1 Defrost relay (B) : NO 8(4)A NC 6(3)A max 250Va 1 Defrost 2 relay (C) : NO 5(2)A max 250Va 1 Aux/Fans relay (D) : NO 5(2)A max 250Va

Mechanical Characteristics

Container: PC+ABS UL94 V-0 resin casing, polycarbonate window, thermoplastic resin keys Dimensions: front 74x32 mm, depth 59 mm (without terminals) Terminals: screw/disconnectable terminals for wires with cross-section of 2.5mm

Connectors: TTL for connection to Copy Card + D.I.2 (only EWPlus 978) Humidity: Usage / Storage: 10...90% RH (non-condensing)

Regulations

Electromagnetic compatibility: The device complies with Directive 2004/108/EC Safety: The device complies with Directive 2006/95/EC Food Safety: The device complies with standard EN13485 as follows:

- suitable for storage

- application: air

- climate range A

- measurement class 1 in the range from -25°C to 15°C (exclusively using Eliwell NTC probes)

NOTE: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer strictly

to the instrument 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 error of the instrument.

ELECTRICAL CONNECTIONS

Important! Make sure the machine is switched off before working on the electrical connections.

The instrument is equipped with screw or disconnectable terminal boards for connection of wires having a maximum cross section of 2.5 mm2 (a single conductor per terminal for the power feeding connections): refer to the label on the instrument for details of the terminal ratings. Do not exceed the maximum permitted current; for higher loads, use a contactor with sufficient power capacity. Make sure that the power supply is of the correct voltage for the device. 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 electromagnetic compatibility -EMC: take great care with the wiring). Probe cables, power supply cables and the TTL serial cables should be routed separately from power cables.

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EWPlus 978 are versatile controllers that can handle 2 compressors and 1 or 2 defrosts.

EWPlus 978 controllers have: 4 relay outputs 2 temperature sensors (regulation and evaporator)

1 multifunctional Digital (D.I.1)/Temperature (Pb3) input 1 Digit Input (D.I.2) that can be activated on TTL

The second probe can be used to control the defrost cycle and the evaporator fans.

The 4 relay outputs can be used to control:

• compressor

• defrosting elements

• evaporator fans

• alarms

• AUX output

• stand-by

• condenser fans reversal

• check valve

• evaporator 2 defrost

• compressor 2

The Digital inputs (D.I.1 and D.I.2) can be used for:

• activation

• reduced SET

• AUX management

• door switch

• external alarm

• stand-by

• pressure switch

• deep-cooling

• Energy Saving

• door switch + Energy Saving

DESCRIPTION OF EWPlus 978 FAMILY

EWKPlus 978 are versatile keyboards capable of managing power boards from remote.

EWKPlus 978 keyboards have: 2 temperature sensors (regulation and evaporator)

1 multifunctional Digital (D.I.1)/Temperature (Pb3) input

The second probe can be used to control the defrost cycle and the evaporator fans.

The Digital input (D.I.1) can be used for:

• activation

• reduced SET

• AUX management

• door switch

• external alarm

• stand-by

• pressure switch

• deep-cooling

• Energy Saving

• door switch + Energy Saving

DESCRIPTION OF EWKPlus 978 FAMILY

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"USER" MENU PARAMETERS TABLE

Param. DESCRIPTION RANGE M.U. AP1 AP2 AP3

SEt Temperature control SEtpoint. LSE ... HSE °C/°F -18.0 -18.0 -23.0

dF1 Compressor relay activation differential. (dF1 must be ≠ 0). 0.1 ... 30.0 °C/°F 4.0 4.0 2.5 HSE Maximum value that can be assigned to the setpoint. LSE ... 320 °C/°F -5.0 -5.0 -15.0 LSE Minimum value that can be assigned to the setpoint. -58.0 ... HSE °C/°F -35.0 -35.0 -30.0 CP2 Delay before activation of compressor step 2 0 ... 255 secs 5 5 5

dty Type of defrost (0 = electric, 1 = reverse cycle, 2 = Free). 0/1/2 num 1 1 1

dit Interval between the start of two consecutive defrost cycles. 0 ... 250 hours 4 6 8

dEt Defrost time-out; determines the maximum defrost duration 1 ... 250 min 30 20 45 dS1 Defrost end temperature (determined by probe Pb2). -67.0 ... 320 °C/°F 8.0 60.0 15.0 dS2 Evaporator 2 defrost end temperature (determined by probe Pb3). -67.0 ... 320 °C/°F 8.0 8.0 8.0

FSt

Fans stop temperature; if Pb2 > FSt, the fans are stopped. The value is either positive or negative and, depending on parameter FPt, can be either the absolute temperature or the temperature relative to the setpoint.

-50.0 ... 150 °C/°F 50.0 -50.0

FSS Evaporator fans activation temperature differential. 0.0 ... 100.0 °C/°F 0.0 0.0

Fot

Fans start temperature; if the temperature on the evaporator is lower than the value set in this parameter, the fans remain off. The value is either positive or negative and, depending on parameter FPt, can be either the absolute temperature or the temperature relative to the setpoint.

-67.0 ... 320 °C/°F -20.0

FAt Fan activation differential (see par. FSt). 1.0 ... 50.0 °C/°F 2.0

Fdt Fan activation delay after a defrost cycle. 0 ... 250 min 0 0 0

dt drainage time. Coil drainage time. 0 ... 250 min 3 0 0

dFd

Allows exclusion of the evaporator fans to be selected or not selected during defrosting. n (0) = no; y (1) = yes.

n/y flag y n y

HAL

Maximum temperature alarm. Temperature value which if exceeded in an upward direction triggers the activation of the alarm signal.

LAL ... 320 °C/°F 50.0 50.0 8.0

LAL

Minimum temperature alarm. Temperature value which if exceeded in a downward direction triggers the activation of the alarm signal.

-67.0 ... HAL °C/°F -50.0 -50.0 -2.0

tAO Time delay for temperature alarm indication. 0 ... 250 min 90 90 120 OSP Offset on setpoint -30.0 ... 30.0 °C/°F 0.0 0.0 0.0 OdF Activation differential correction 0.0 ... 30.0 °C/°F 0.0 0.0 0.0

PtS Select protocol. t (0) = Televis; d (1) = ModBus. t/d flag d

Parameters not present

in vectors

dEA Device address: indicates the device address to the management protocol. 0 ... 14 num 1 FAA Family address: indicates the device family to the management protocol. 0 ... 14 num 0

Pty Sets Modbus parity bit. n (0) = none; E (1) = equal; o (2) = unequal. (only if PtS=d) n/E/o num n

StP Sets Modbus Stop bit. 1b/2b flag 2b StO Serial 1 timeout. 0 ... 255 secs 0 LOC LOCk. Basic commands modification lock. n (0) = no; y (1) = yes. n/y flag n n n PS1 PAssword 1. When enabled (PS1 ≠ 0), this password provides access to level1 parameters (User). 0 ... 250 num 10 10 10 CA1 Calibration 1. Value to be added to the value read by Pb1. -12.0 ... 12.0 °C/°F 2.0 4.0 0.0 CA2 Calibration 2. Value to be added to the value read by Pb2. -12.0 ... 12.0 °C/°F 0.0 0.0 0.0 CA3 Calibration 3. Value to be added to the value read by Pb3. -12.0 ... 12.0 °C/°F 0.0 0.0 0.0

ddL

Display mode during defrost.

0= displays the temperature read by probe Pb1; 1= locks the reading at the temperature value read by probe Pb1 when defrosting starts and until the next time

the SEt* is reached; 2= displays the label deF during defrosting and until the next time the SEt* is reached (or until Ldd has elapsed) (* See parameter dCS and "Deep Cooling Cycle" paragraph)

0/1/2 num 2 2 2

Ldd Timeout value for display unlock - label dEF 0 ... 255 min 30 30 60 H42 Presence of Evaporator probe (Pb2). n (0) = not present; y (1) = present. n/y flag y y y H43 Probe 3 (Pb3) present. n (0) = not present; y (1) = present; 2EP (2) = evaporator 2 defrost. n/y/2EP flag 2EP 2EP n

H45

Start defrost mode for applications with double evaporator.

0 = evaporator 1 only; 1 = if at least one of the evaporators is below its defrost end temperature Pb2 value < dS1 (evaporator 1) or Pb3 value < dS2 (evaporator 2); 2 = if both evaporators are below their respective defrost end temperature Pb2 value < dS1 (evaporator 1) and Pb3 value < dS2 (evaporator 2). 3 = evaporator 1 and evaporator 2 activated alternately

0/1/2/3 num 3 1 0

rEL Firmware release. Reserved: read-only parameter / / / / /

tAb Parameters tAble. Reserved: read-only parameter / / / / /

Note: ** The “USER” menu parameters also include “PA2” which permits access to the “Installer” menu.

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Param. DESCRIPTION RANGE M.U. AP1 AP2 AP3

SEt Temperature control SEtpoint. The SEtpoint is only visible in the "machine status" menu. LSE ... HSE °C/°F -18.0 -18.0 -23.0

COMPRESSOR (folder "CP")

dF1 diFferential. Compressor relay activation differential. NOTE: dF1 cannot be equal to 0. 0.1 ... 30.0 °C/°F 4.0 4.0 2.5

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.

LSE ... 320 °C/°F -5.0 -5.0 -15.0

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.

-58.0 ... HSE °C/°F -35.0 -35.0 -30.0

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.

0 ... 250 min 20 20 25

OFt

Controller switch-off time in the event of a 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.

0 ... 250 min 5 5 5

dOn Compressor relay activation delay after request. 0 ... 250 secs 0 0 0 dOF Delay after switching off and subsequent switch-on. 0 ... 250 min 3 3 3

dbi Delay between two consecutive compressor switch-ons 0 ... 250 min 0 0 0 OdO

(!)

Delay in activating outputs after the instrument is switched on or after a power failure.

0 = not active

0 ... 250 min 0 0 0

CP2 Delay before activation of compressor step 2 0 ... 255 secs 5 5 5

DEFROST (folder "dEF")

dty

defrost type. Type of defrost.

0 = electric defrosting - compressor off (OFF) during defrosting 1 = reverse cycle defrost (hot gas) - compressor ON during defrosting 2 = Free: defrost independent of compressor

0/1/2 num 1 1 1

dit

Interval between the start of two consecutive defrost cycles. 0 = function disabled (defrost NEVER performed)

0 ... 250 hours 4 6 8

dCt

Selects the count mode for the defrost interval:

0 = compressor running hours (DIGIFROST® method); Defrost active ONLY when the compressor is on. NOTE: compressor running hours are 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 stop. Every time the compressor stops, a defrost cycle is performed according to

parameter dtY;

3 = not USED

0/1/2/3 num 1 1 1

dOH Defrost start delay time after request. 0 ... 59 min 0 0 0

dEt Defrost time-out; determines the maximum defrost duration 1 ... 250 min 30 20 45 dS1 Defrost end temperature (determined by probe Pb2). -67.0 ...320 °C/°F 8.0 60.0 15.0 dS2 Evaporator 2 defrost end temperature (determined by probe Pb3). -67.0 ...320 °C/°F 8.0 8.0 8.0

dPO

Determines if the device should switch to defrost at switch-on (depending on the evaporator temperature read). n (0) = no, no defrost at switch-on; y (1) = yes, defrost at switch-on.

n/y num n n n

FAN REGULATOR (folder FAn) (NOTE: for these parameters, Evaporator means Evaporator 1)

FPt

Characterises parameter “FSt” which can be expressed either as an absolute temperature value or as a value relative to the setpoint. 0 = absolute; 1 = relative.

0/1 flag 0 0 0

FSt

-67.0 ...320 °C/°F 50.0 99.0 -50.0

FSS

Evaporator fans activation temperature differential.

• If FSS = 0, the differential is disabled.

• If FSS > 0, the regulator will be active in parallel with the temperature control regulator and the fans

output will be activated if at least one of the two regulators require it to be activated (output ON); it will be deactivated if both regulators are switched off (output OFF).

With FSS > 0 temperature control of fans occurs based on the difference between the temperature of the main control probe (ST1) and that of the evaporator (ST2). If ST1-ST2 > FSS with differential equal to parameter FAd but with the opposite sign, fans switch-on will be forced.

0.0 ... 100.0 °C/°F 0.0 0.0 0.0

Fot

-67.0 ... 320 °C/°F -20.0

FAd Fans activation intervention differential (see par. “FSt”). 1.0 ... 50.0 °C/°F 2.0 2.0 2.0

Fdt Fans activation delay after a defrost cycle. 0 ... 250 min 0 0 0

dt drainage time. Coil drainage time. 0 ... 250 min 3 0 0

dFd Allows exclusion of the evaporator fans to be selected or not during defrosting. n (0) = no; y (1) = yes. n/y flag y n y

FCO

Evaporator fans operating mode. The state of the fans will be:

DAY NIGHT

H42 FCO

COMPRESSORONCOMPRESSOR

OFF

COMPRESSORONCOMPRESSOR

OFF

H42 = y

Thermostat controlled OFF Thermostat controlled OFF

Thermostat controlled Thermostat controlled Thermostat controlled Thermostat controlled

Thermostat controlled Duty Cycle Day Thermostat controlled Duty Cycle Night

Duty Cycle Day Duty Cycle Day Duty Cycle Night Duty Cycle Night

H42 = n

ON OFF ON OFF

ON Duty Cycle Day ON Duty Cycle Night

Duty Cycle Day Duty Cycle Day Duty Cycle Night Duty Cycle Night

Duty cycle Day: controlled by means of parameters “Fon” and “FoF”. Duty cycle Night: controlled by means of parameters “Fnn” and “FnF”.

0/1/2/3 num 0 1 0

"INSTALLER" MENU PARAMETERS table

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Param. DESCRIPTION RANGE M.U. AP1 AP2 AP3

Fon

Fans ON time in duty cycle. Fans used in duty cycle mode; valid when FCO = dc and H42=1 (probe Pb2 present)

0 ... 250 min 0 0 0

FoF

Fans OFF time in duty cycle. Fans used in duty cycle mode; valid when FCO = dc and H42=1 (probe Pb2 present)

0 ... 250 min 0 0 0

ALARMS (folder AL)

Att

HAL and LAL parameters mode, i.e. the absolute temperature value or differential in relation to the setpoint. 0 = absolute value; 1 = relative value.

NOTE: In case of relative values (par. Att=1), the HAL parameter should be set to positive values, while the LAL parameter should be set to negative values (-LAL).

0/1 num 0 0 1

AFd Alarms activation differential. 1.0 ... 50.0 °C/°F 2.0 2.0 1.0

HAL (!)

Maximum temperature alarm. Temperature value (intended either as distance from setpoint or as an absolute value based on Att) which, if exceeded in an upward direction, triggers the activation of the alarm signal.

See “Max/Min temperature alarms”.

LAL to 320 °C/°F 50.0 50.0 8.0

LAL (!)

Minimum temperature alarm. Temperature value (intended as distance from setpoint or as an absolute value based on Att) which, when exceeded downwards, triggers the activation of the alarm signal.

See “Max/Min temperature alarms”.

-67.0 to HAL °C/°F -50.0 -50.0 -2.0

PAO (!)

Alarm override time after device is switched on following a power failure.

This parameter refers to high/low temperature alarms only.

0 ... 10 hours 1 1 1

dAO Temperature alarm exclusion time after defrost. 0 ... 999 min 60 60 60 OAO Alarm signal delay (low and high temperature) after the deactivation of the digital input (port closed). 0 ... 10 hours 0 0 0

tdO Delay in door open alarm activation. 0 ... 250 min 0 0 0

tAO

Time delay for temperature alarm indication.

This parameter refers to high/low temperature alarms only.

0 ... 250 min 90 90 120

dAt Alarm signalling end of defrost due to timeout. n (0) = alarm not activated; y (1) = alarm activated. n/y flag n n n

rLO Regulators locked by external alarm. n (0) = does not lock; y (1) = locks. n/y flag n n n SA3 Alarm setpoint for probe Pb3. -67.0 ... 320 °C/°F 50.0 50.0 50.0 dA3 Probe Pb3 alarm activation differential. 1.0 ... 50.0 °C/°F 1.0 1.0 2.0

LIGHTS AND DIGITAL INPUTS (folder Lit)

dOd

Enable utility switch-off on activation of door switch.

0 = disabled 1 = disables fans 2 = disables the compressor; 3 = disables fans and compressor

0/1/2/3 num 0 0 0

dAd Digital input activation delay. 0 ... 255 min 0 0 0 dCO Delay in deactivating compressor after door opened 0 ... 255 min 0 0 0 dCd Delay in activating fans after door closed 0 ... 250 secs 0 0 0

PRESSURE SWITCH (folder PrE)

PEn Number of errors allowed per pressure switch input. 0 = disabled 0 ... 15 num 0 0 0

PEI Pressure switch error count interval. 1 ... 99 min 1 1 1 PEt Delay in activating compressor after pressure switch deactivation 0 ... 255 min 0 0 0

DEEP COOLING (folder dEC)

dCS Deep cooling setpoint -67.0 ... 320 °C/°F -30.0 -30.0 -30.0

tdC Deep cooling duration 0 ... 255 min 60 60 60

dcc Defrost delay after deep cooling 0 ... 255 min 0 0 0

Sid Threshold for start of deep cooling -67.0 ... 320 °C/°F 10.0 10.0 10.0 toS Deep cooling activation time 0 ... 255 min 30 30 30

ENERGY SAVING (folder EnS)

ESt

Energy Saving mode:

0= disabled; 1= Offset on setpoint; 2= Offset on differential; 3= offset on setpoint and differential; 4= not used; 5= not used; 6= not used

0 ... 6 num 0 0 0

OSP Offset setpoint -30.0 ... 30.0 °C/°F 0.0 0.0 0.0 OdF Differential offset 0.0 ... 30.0 °C/°F 0.0 0.0 0.0

COMMUNICATION (folder Add)

PtS Select protocol. t (0) = Televis; d (1) = ModBus. t/d flag d

Parameters not present

in vectors

dEA Device address: indicates the device address to the management protocol. 0 ... 14 num 1

FAA Family address: indicates the device family to the management protocol. 0 ... 14 num 0

Pty Sets Modbus parity bit. n (0) = none; E (1) = equal; o (2) = unequal. (only if PtS=d) n/E/o num n StP Sets Modbus Stop bit. 1b/2b flag 2b

StO Serial 1 timeout. 0 ... 255 secs 0

DISPLAY (folder diS)

LOC

LOCk. Setpoint edit lock. You will still be able to open parameter programming and alter parameters, including the state of this parameter if you need to unlock the keyboard for example. n (0) = no; y (1)= yes.

n/y flag n n n

PS1 PAssword 1. When enabled (PS1 ≠ 0), this password provides access to level1 parameters (User). 0 ... 250 num 10 10 10 PS2 PAssword 2. When enabled (PS2 ≠ 0), this password provides access to level2 parameters (Installer). 0 ... 250 num 10 10 10

ndt Display with decimal point. n (0) = no (integers only); y (1) = yes (display with decimal point). n/y flag y y y

CA1

Calibration 1. Positive or negative temperature value added to the value read by Pb1. This sum is used both for the temperature displayed and for regulation.

-12.0...12.0 °C/°F 2.0 4.0 0.0

CA2

Calibration 2. Positive or negative temperature value added to the value read by Pb2. This sum is used both for the temperature displayed and for regulation.

-12.0...12.0 °C/°F 0.0 0.0 0.0

CA3

Calibration 3. Positive or negative temperature value added to the value read by Pb3. This sum is used both for the temperature displayed and for regulation.

-12.0...12.0 °C/°F 0.0 0.0 0.0

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Param. DESCRIPTION RANGE M.U. AP1 AP2 AP3

CAi

CAlibration Intervention. Activation of offset for display, temperature control or both.

0 = only temperature shown is modified; 1 = sum with only the temperature used by the regulators, not for the display, which remains unchanged; 2 = sum with the displayed temperature, which is also used by the regulators.

0/1/2 num 2 2 2

ddL

Display mode during defrost.

0 = displays the temperature read by probe Pb1; 1 = locks the reading at the temperature value read by probe Pb1 when defrosting starts and until the

next time the SEt is reached;

2 = displays the label deF during defrosting and until the next time the SEt* is reached (or until Ldd has elapsed). (* See parameter dCS and "Deep Cooling Cycle" paragraph)

0/1/2 num 2 2 2

Ldd Timeout value for display unlock - label dEF 0 ... 255 min 30 30 60

dro

Selection of °C or °F to display the probe value. 0 = °C, 1 = °F. NOTE: switching from °C to °F or

vice versa DOES NOT modify the setpoint, differential, etc. (e.g. set=10°C becomes 10°F).

0/1 num 0 0 0

ddd

Selects type of value to display. 0 = setpoint; 1 = probe Pb1; 2 = probe Pb2; 3 = probe Pb3.

0/1/2/3 num 1 1 1

FSE Display filter sensibility. 0 = disabled. 0 ... 7 num 6

Parameters

not present

in vectors

FdS Filter de-activation threshold. -55.0...230 °C/°F 0.0

Ftt Time elapsed above threshold. 0 ... 250 min 15

FHt Sampling time. 1 ... 250 secs 8

CONFIGURATION (folder CnF) - NOTE: the instrument must be switched off and then on again each time the configuration of parameters

in folder CnF is modified in order to prevent malfunction of the configuration and/or ongoing timings.

H08

Function when in standby mode.

0 = display off; the regulators are active and the device reactivates the display to signal any alarms; 1 = display off; regulators and alarms blocked; 2 = display shows OFF label; regulators and alarms blocked.

0/1/2 num 2 2 2

H11

Configuration of digital input 1/polarity (DI1).

0 = disabled; ± 1 = defrost; ± 2 = reduced set; ± 3 = AUX; ± 4 = door switch; ± 5 = external alarm; ± 6 = stand-by (ON-OFF); ± 7 = pressure switch; ± 8 = deep cooling; ± 9 = energy saving; ± 10 = door switch + energy saving.

NOTE: - The “+” sign indicates that the input is active when the contact is closed

- The “-” sign indicates that the input is active when the contact is open

-10 ... 10 num 0 0 0

H12 Configuration of digital input 2/polarity (DI2). Same as H11. -10 ... 10 num 0 0 0

H21

Configuration of digital output 1 (A).

0 = disabled; 1 = compressor; 2 = defrost; 3 = Fans; 4 = alarm; 5 = AUX; 6 = Stand-by; 7 = not used; 8 = condenser fans reversal; 9 = check valve; 10 = evaporator 2 defrost; 11 = compressor 2.

0 ... 11 num 1 1 1

H22

Configuration of digital output 2 (B). Same as H21.

0 ... 11 num 2 3 4

H23

Configuration of digital output 3 (C). Same as H21.

0 ... 11 num 10 10 2

H24

Configuration of digital output 4 (D). Same as H21.

0 ... 11 num 5 5 4

H31

UP key configuration. 0 = disabled; 1 = defrost; 2 = AUX; 3 = reduced set; 4 = Stand-by; 5 = deep cooling; 6 = energy saving

0 ... 6 num 1 1 1

H32 DOWN key configuration. Same as H32. 0 ... 6 num 0 0 0 H33 ESC key configuration. Same as H32. 0 ... 6 num 2 2 0 H42 Presence of Evaporator probe (Pb2). n (0) = not present; y (1) = present. n/y flag y y y H43 Probe 3 (Pb3) present. n (0) = not present; y (1) = present; 2EP (2) = evaporator 2 defrost. n/y/2EP flag 2EP 2EP n

H45

Start defrost mode for applications with double evaporator.

0/1/2/3 num 3 1 0

reL Firmware version. Device software release: read-only parameter / / / / /

tAb Parameters tAble. Reserved: read-only parameter / / / / /

COPY CARD (folder Fpr)

UL Upload. Transfer programming parameters from instrument to CopyCard / / / / /

Formatting. Deletes data on Copy Card

IMPORTANT: If parameter “Fr” is used, the data entered will be permanently lost.

This operation cannot be reversed.

/ / / / /

FUNCTIONS (folder "FnC")

The following function is available inside folder “FnC”:

Function Function label ACTIVE Function label not active Alarm signalling

Reset pressure switch alarms rAP rAP Led ON NOTES: • To modify the status of a given function, press the 'set' key

• If the instrument is switched off, the function labels will return to the default status.

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code 9IS24255-1 • EWPlus 978 + EWKPlus 978 • rel.09/13 • EN

Eliwell Controls s.r.l.

Via dell’Industria, 15 • Z.I. Paludi 32010 Pieve d'Alpago (BL) ITALY Telephone +39 0437 986 111 Fax +39 0437 989 066

www.eliwell.com

Technical Customer Support:

Technical helpline +39 0437 986 300 E-mail: techsuppeliwell@invensys.com

Sales: Telephone +39 0437 986 100 (Italy) +39 0437 986 200 (other countries) E-mail: saleseliwell@invensys.com

RESPONSIBILITY AND RESIDUAL RISKS

ELIWELL CONTROLS SRL declines all liability for damage due to:

- installation/use other than expressly specified and, in particular, in conflict with the safety prescriptions set down in regulations and/ or specified in this document;

- use on panels that do not provide adequate protection against electric shocks, water or dust in the adopted mounting conditions;

- use on panels allowing access to dangerous parts without having to use tools;

- tampering with and/or modification of the product;

- installation/use on panels that do not comply with statutory laws and regulations.

DISCLAIMER

This document is the exclusive property of ELIWELL CONTROLS SRL and may not be reproduced or circulated without the express permission of ELIWELL CONTROLS SRL. While all possible care has been taken to ensure the accuracy of this document, ELIWELL CONTROLS SRL cannot accept liability for any damage resulting from its use. The same applies to any person or company involved in preparing and editing this document. ELIWELL CONTROLS SRL reserves the right to make aesthetic or functional changes at any time without notice.

CONDITIONS OF USE

Permitted use

For safety reasons, the device must be installed and used according to the instructions provided. In particular, parts carrying dangerous voltages must not be accessible in normal conditions. The device must be adequately protected from water and dust with regard to the application, and must only be accessible using tools (with the exception of the front panel). The device is suitable for use in household refrigeration appliances and/or similar equipment and has been tested for safety aspects in accordance with the harmonised European reference standards.

Improper use

Any use other than that expressly permitted is prohibited. The relays provided are of a functional type and can be subject to failure: any protection devices required by product standards, or suggested by common sense for obvious safety requirements, must be installed externally to the controller.

DISPOSAL

The appliance (or the product) must be disposed of separately in compliance with the local standards in force on waste disposal.

Eliwell EWKPlus 978, EWPlus 978 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual