Eliwell EW961 Manuale utente

ENGLISH

Electronic controllers for refrigeration units

EW961/971/974

set

STAND-BY (ESC)

Press and release

Returns to the previous menu level

Conrm parameter value

Press for at least 5 secs

Activates the Stand-by function

(when outside the menus)

Press and release

Scrolls through menu items

Increases values

Press for at least 5 secs

Activates the Manual Defrost function

DOWN

Press and release

Scrolls through menu items

Decreases values

Press for at least 5 secs

Congurable function by user (par. H32)

SET (ENTER)

Press and release

Displays alarms (if active)

Opens the Machine Status menu

Press for at least 5 secs

Opens the Programming menu

Conrms commands

SET / Reduced SET LED

Flashing: reduced set active

Quick ashing: access to level 2 parameters

Off: otherwise

Compressor LED

Permanently on: compressor active

Flashing: delay, protection or

blocked start-up

Off: otherwise

Defrost LED

Permanently on: defrost active

Flashing: manual or D.I. activation

Off: otherwise

Fan LED

Permanently on: fans active

Off: otherwise

Alarm LED

Permanently on: alarm on

Flashing: alarm acknowledged

Off: otherwise

set

EN ENGLISH

KEYS AND LEDs

set

set set

set

ACCESSING AND USING THE MENUS

Resources are organised into 2 menus which are accessed as explained below:

• ‘Machine Status’ menu: press and release the key.

• ‘Programming’ menu: press for at least 5 secs the key.

Either do not press any keys for 15 seconds (time-out) or press the key once, to conrm the last value displayed

and return to the previous screen.

MACHINE STATUS MENU

Access the “Machine Status” menu by pressing and releasing the key. If no alarms are active, the “SEt” label

appears. By pressing the and keys you can scroll all folders in the “Machine Status” menu:

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

- SEt: Set point setting folder;

- Pb1: probe 1 folder;

- Pb2: probe 2 folder **;

(** models EW971 and EW974 only)

Setting the Set point: To display the Set point value press the key when the ‘SEt’ label is displayed.

The Set point value appears on the display. To change the Set point value, press the

and keys within 15 seconds. Press to conrm the modication.

Displaying the probes: When the Pb1 or Pb2* label is displayed, press and the associated probe value will

appear (* Pb2 is only present on models EW971 and EW974).

SET POINT EDIT LOCK

It is possible to disable the keypad on this device. The keypad can be locked by programming the ‘LOC’ parameter.

With the keypad locked you can still access the ‘Machine Status’ menu by pressing to display the Set point,

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

set

setset

set

PROGRAMMING MENU

To access the ‘Programming’ menu press for at least 5 secs the key. If specied, the ‘PA1’ access PASSWORD will

be requested (see ‘PASSWORD’ paragraph). At the access, the display will show the rst parameter (“diF”).

By pressing the and keys you can scroll all parameters in the Programming menu:

5 secs

Select the desired parameter using the and keys. Press to see the current value of the selected

parameter. Press and to change the value and then press to save it.

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

is changed, in order to prevent malfunctioning of the conguration and/or ongoing timings.

PASSWORD

The password “PA1” allow access to the level 1 parameters (USEr) as the password “PA2” allow access to the level 2

parameters (Installer). The level 2 parameters group include also all the level 1 parameters.

Default setting has the password “PA1” disabled (value = 0) while the password “PA2” is enabled (value = 15).

To enabled the password “PA1” (value ≠ 0) and assign the required value, enter in the “Programming” menu, select the

parameter “PS1” with and keys, press the key, assign the required value and conrm it by pressing the

key again.

If the password “PA1” is already enable, at the access to the “Programming” menu, will be required to put in the

password “PA1” or “PA2” according to the parameters that you need to edit. To enter the password ‘PA1’ (or ‘PA2’):

5 secs

If the password is incorrect, the display will show the ‘PA1’ (or ‘PA2’) label and you will have to repeat the entry

procedure. It is possible to access to level 2 parameters also from level 1 parameters by selecting parameter ‘PA2’

(available at level 1) through and keys and then pressing the key.

ALARMS

Label Fault Cause Eects Remedy

E1 Probe1 faulty

(cold room)

• reading of out of range operating

values

• probe faulty / short-circuited / open

• Display label E1

• Alarm icon permanently ON

• Min/max alarm regulator disabled

• Compressor operation according to “Ont”

and “OFt” parameters.

• check probe type (NTC)

• check the probe wiring

• replace probe

E2 Probe2 faulty

(defrost)

• reading of out of range operating

values

• probe faulty / short-circuited / open

• Display label E2

• Alarm icon permanently ON

• The defrost cycle will end due to Time out

(Parameter “dEt”)

• check probe type (NTC)

• check the probe wiring

• replace probe

AH1

Probe1 HIGH

Temperature

alarm

• value read by Pb1 > HAL after time

of “tAO”.

(see “MIN/MAX ALARMS table)

• Registration AH1 label in the AL folder

• No eect on regulation

• Wait until temperature value read

by probe1 returns below HAL.

AL1

Probe1 LOW

Temperature

alarm

• value read by Pb1 < LAL after time

of “tAO”.

(see “MIN/MAX ALARMS table)

• Registration AL1 label in the AL folder

• No eect on regulation

• Wait until temperature value read

by probe1 to come back obove LAL

EA External alarm • Digital input activated

(H11 set as external alarm)

• Registration EA label in the AL folder

• Alarm icon permanently ON

• Regulation blocked if EAL = y

• check and remove the external

cause which generate alarm on D.I.

OPd Door Open alarm

• Digital input activated

(H11 set as door switch)

(for a longer time than tdO)

• Registration Opd label in the AL folder

• Alarm icon permanently ON

• Regulator blocked

• close the door

• delay function dened by OAO

Ad2 Defrosting

for time-out

• end of defrosting because of time

instead of because of reaching the

defrost end temperature detected by

the Pb2 probe.

• Registration Ad2 label in the AL folder

• Alarm icon permanently ON

• wait until the next defrost for

automatic return

74 mm

32 mm

29 mm

71 mm

70 mm

59 mm

MANUAL DEFROST CYCLE ACTIVATION

To manually activate the defrost cycle, hold down the key for 5 seconds.

If the defrost conditions are not satised:

- the parameter OdO ≠ 0 (EW961, EW971 and EW974)

- the evaporator probe Pb2 temperature is higher than the defrost end temperature (EW971 and EW974)

the display will ash 3 times, to indicate that the operation will not be carried out.

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 ash.

NOTES: If alarm exclusion times have been set (see ‘AL’ folder in the parameters table) the alarm will not be signalled.

A probe 1 (Pb1) malfunction alarm will appear directly on the display with the

indication E1.

Models EW971 and EW974: A probe 2 (Pb2) malfunction alarm will appear

directly on the display with the indication E2.

MECHANICAL ASSEMBLY

The instrument is designed for panel mounting. Make a hole of 29x71 mm, insert the instrument and x it using

the brackets provided. Do not mount the instrument in humid and/or dirty places; it is suitable for use in ordinary

polluted places. Ventilate the place in proximity to the instrument colling slits.

set

UPLOAD

DOWNLOAD

set

USING THE COPY CARD

The Copy Card is an accessory connected to the TTL serial port used for quick programming of the device para-

meters (upload and download a parameter map to one or more devices of the same type). Upload (label UL) and

copy card formatting (label Fr) operations should be performed as explained below:

After the password ‘PA2’ has been putted in, press the and keys to scroll through to the required function

(e.g. UL). Press the key to execute the upload. If the operation is successful, the display will show ‘y’, if not it

will show ‘n’.

Upload (UL) This function uploads the programming parameters from the device.

UPLOAD: device Copy Card

Format (Fr) This command is used to format the copy card, an operation which is necessary when using the

card for the rst time. Important: when the copy card has been programmed, the parameter ‘Fr’

will delete all data that have been entered. This operation cannot be cancelled.

Download from reset:

Connect the copy card when the device is switched off. When

the device is switched on, the download from the copy card will

begin automatically. At the end of the lamp test, the display will

show ‘dLy’ if the operation was successful and ‘dLn’ if not.

DOWNLOAD: Copy Card device

NOTES:

- after the parameters have been downloaded, the device uses the downloaded parameter map settings.

MAX AND MIN TEMPERATURE ALARM

Relative Temperature

Value to setpoint (Att=1)

Absolute Temperature

Value (Att=0)

Temp. ≤ Set + LAL (only with LAL<0*)

Temp. ≥ Set + HAL (only with HAL>0**)

Temp. ≥ Set + LAL + AFd o

≥ Set - ILALI + AFd (LAL < 0*)

Temp. ≤ Set + HAL - AFd (HAL > 0**)

Temp. ≤ LAL (LAL with sign)

Temp. ≥ HAL (HAL with sign)

Temp. ≥ LAL + AFd

Temp. ≤ HAL - AFd

Minimum temperature

alarm

Maximum temperature

alarm

Returning from

minimum temp. alarm

Returning from

maximum temp. alarm

* if LAL is negative, Set + LAL < Set

** if HAL is negative, Set + HAL < Set

Setpoint - LAL

AFd

Off

Setpoint + HAL

AFd

Setpoint - LAL + AFd Setpoint + HAL - AFd

Setpoint LAL

AFd

HAL

AFd

LAL + AFd HAL - AFd

ELECTRICAL WIRING

Attention! Never work on electrical connections when the machine is switched on.

The device is equipped with screw or removable terminals for connecting electric cables with a diameter of 2.5mm2

(one wire per terminal for power connections).

For the capacity of the terminals, see the label on the instrument.

Do not exceed the maximum current allowed; in case of higher loads, use an appropriate contactor.

Make sure the power supply voltage complies with the one required by the instrument.

Probes have no connection polarity and can be extended using a regular bipolar cable (note that the extension of

the probes affects the EMC electromagnetic compatibility of the instrument: pay extreme attention to wiring).

Probe cables, power supply cables and the TTL serial cables should be distant from power cables.

RESPONSIBILITY AND RESIDUAL RISKS

ELIWELL CONTROLS SRL shall not be liable for any damages deriving from:

- installation/use other than that prescribed and, in particular, that which does not comply with safety standards

anticipated by regulations and/or those given herein;

- use on boards which do not guarantee adequate protection against electric shock, water or dust under the

conditions of assembly applied;

- use on boards which allow access to dangerous parts without the use of tools;

- tampering with and/or alteration of the products;

- installation/use on boards that do not comply with the standards and regulations in force.

DISCLAIMER

This manual and its contents remain the sole property of ELIWELL CONTROLS SRL, and shall not be reproduced or

distributed without authorization by ELIWELL CONTROLS SRL.

Although great care has been exercised in the preparation of this document, ELIWELL CONTROLS SRL, its employees

or its vendors, cannot accept any liability whatsoever connected with 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 any changes or improvements without prior notice.

CONDITIONS OF USE

Permitted use

For safety reasons the instrument must be installed and used according to the instruction provided and in parti-

cular, under normal conditions, parts bearing dangerous voltage levels must not be accessible. The device must be

adequately protected from water and dust as per the application and must also only be accessible via the use of

tools (with the exception of the frontlet).

The device is ideally suited for use on household appliances and/or similar refrigeration equipment and has been

tested with regard to the aspects concerning European reference standards on safety.

Unpermitted use

Any other use other than that permitted is de facto prohibited. It should be noted that the relay contacts provided

are of a practical type and therefore subject to fault. Any protection devices required by product standards or

dictated by common sense due to obvious safety reasons should be applied externally.

TECHNICAL DATA (EN 60730-2-9)

Use: control device (not safety) to integrate

Mounting: panel mounting with 71x29 mm (+0.2/-0.1 mm) drilling template

Control type: 1.B

Pollution rating: 2

Material class: IIIa

Overvoltage category class: II

Nominal impulsive voltage: 2500V

Temperature: Operating: –5 … +55 °C - Storage: –30 … +85 °C

Power Supply: 230Vac (+10% / -10%) 50/60 Hz

Consumption: 4,5W max

Digital Output (relays): please refer to the device label

Fire resistance class: D

Software class: A

NOTA: check the power supply specied on the instrument label; for relay, power supply capacities

and PTC probes, contact the Sales Ofce.

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