Eliwell EWPlus 902 Manuale utente

Electronic controllers for refrigeration units

Controles electrónicos para unidades de refrigeración

Contrôleurs électroniques pour unités réfrigérantes

Controladores eletrônicos para unidades de refrigeração

EWP ///

Installation manual includes:

English, Spanish, French, and Portuguese

Electronic controllers for refrigeration units

STAND-BY (ESC)

Press and release

Returns to the previous menu level

Conﬁrm 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

Conﬁgurable 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

Conﬁrms commands

set

KEYS

902/961

971/974

ENGLISH

LEDs

Reduced SET / Economy

Flashing: reduced set active

Quick ﬂashing: 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

(only EWPlus 971 and EWPlus 974)

Alarm LED

Permanently on: alarm on

Flashing: alarm acknowledged

Off: otherwise

HEAT mode LED

Permanently on: compressor in HEAT mode

Off: otherwise

(only EWPlus 902 and EW Plus 961)

NOT USED

(only EWPlus 902 and EWPlus 961)

Aux LED

Permanently on: Aux active*

*depending on model

(only EWPlus 971 and EWPlus 974)

°C LED

Permanently on: °C setting (dro = 0)

Off: otherwise

°F LED

Permanently on: °F setting (dro = 1)

Off: otherwise

NOTE:

If the instrument is set in the COOL mode, in order to

use it in the HEAT mode it is necessary to re-program

the instrument by using the properly programmed

Copycard.

The same procedure should be followed to pass from

the HEAT mode to the COOL mode.

ACCESSING AND USING THE MENUS

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

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

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

Either do not press any keys for 15 seconds (time-out) 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 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 EWPlus 971 and EWPlus 974 only)

Setting the Set point: To display the Set point value press the set 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 set to conﬁrm the modiﬁcation.

set

set set

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

will appear (* Pb2 is only present on models EWPlus 971 and EWPlus 974).

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 set to display

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

set

PROGRAMMING MENU

To access the ‘Programming’ menu press for at least 5 secs the set key. If speciﬁed, the ‘PA1’ for the level

1 parameters and the ‘PA2’ for the level 2 parameters access PASSWORD will be requested (see Par.

‘PASSWORD’) At the access, the display will show the ﬁrst parameter (“diF”). By pressing the and keys

you can scroll all parameters in the current level: 5 secs

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

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

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.

PASSWORD

‘PA1’ Password: It allows access to the level 1 parameters. In the standard configuration the password is disabled

(value = 0). To enable it (value ≠ 0) enter the “Programming” menu by pressing the and keys, scroll the

parameters until “PS1” label is displayed, press the set key to display the current value, change it by using the

and keys and then press the set key to save it. If the password is already enabled, you will be required to enter

it to access the ‘Programming’ menu. To enter it:

set

setset

‘PA2’ Password: It allows access to the level 2 parameters. In the standard configuration the password is enabled

(valore ≠ 0). To change its value follow the steps like for ‘PA1’ and change the ‘PS2’ parameter value.

The visibility of the ‘PA2’ label will be:

1) If PA1 and PA2 ≠ 0: By pressing the set key for more than 5 seconds, “PA1” and “PA2” labels will be displayed

at the same level and it will be possible to access either the level 1 or the level 2 parameters.

2) Otherwise: The ‘PA2’ password is present between the level 1 parameters. If ‘PA2’ is enabled, you will be required

to enter it to access the level 2. To enter it follow the steps described for the ‘PA1’ password.

If the password is incorrect, the instruments display the PA1/PA2 label and you will have to repeat the entry

procedure.

set

ALARMS

Label Fault Cause Effects 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 “MAX/MIN TEMP. ALARMS “)

• Registration AH1 label in the AL folder

• No effect 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 “MAX/MIN TEMP. ALARMS”)

• Registration AL1 label in the AL folder

• No effect on regulation

• Wait until temperature value

read by probe1 to come back

obove LAL

EA External alarm • Digital input activated

(H11 = ±5)

• 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 = ±4)

(for a longer time than tdO)

• Registration Opd label in the AL folder

• Alarm icon permanently ON

• Regulator blocked

• Close the door

• Delay function deﬁned 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

MANUAL DEFROST CYCLE ACTIVATION

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

If the defrost conditions are not satisﬁed:

- the parameter OdO ≠ 0 (EWPlus 902/961/971/974)

- the evaporator probe Pb2 temperature is higher than the defrost end temperature (EWPlus 971/974)

the display will ﬂash 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 ﬂash.

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 EWPlus 971/974: 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 2-13/16” x 1-1/8” (71x29mm), insert the ins-

trument and ﬁx 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.

74 mm

32 mm

29 mm

71 mm

70 mm

59 mm

USING THE COPY CARD

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

parameters (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:

set

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

function (e.g. UL). Press the set 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 ﬁrst 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.

UPLOAD

DOWNLOAD

MAX/MIN TEMPERATURE ALARM

Relative Temperature

Value to Setpoint (Att=1)

Absolute Temperature

Value (Att=0)

Temp. ≤ Set + LAL *

Temp. ≥ Set + HAL **

Temp. ≥ Set + LAL + AFd or

≥ 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

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