Eliwell EWPlus 902, EWPlus 961, EWPlus 971, EWPlus 974 Installation Manual

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

3

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)

UP

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

EW

PL

US

902/961

EW

PL

US

971/974

ENGLISH

4

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.

5

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

6

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

set

set

7

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

8

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 ins­trument 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

9

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

10

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

11

CONDITIONS OF USE

Permitted use

For safety reasons the instrument must be installed and used according to the instruction provided and in
particular, 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

Classification: Control device (not safety) to integrate
Mounting: Panel mounting with 2-13/16” x 1-1/8” (71x29mm) drilling template
Control type: 1.B
Pollution rating: 2
Material class: IIIa
Overvoltage category class: II
Nominal impulsive voltage: 2500V
Temperature: Operating: –5 to +65°C (+23 to +149°F) - Storage: –30 to +85°C (–22 to +185°F)
Power Supply: 115Va or 230Va (

+

10% / -10%) 50/60 Hz
Consumption: 4VA max
Digital Output (relays): Please refer to the device label
Fire resistance class: D
Software class: A

NOTE: Check the power supply specified on the instrument label; for relay and power supply
capacities, contact Technical Service.

12

Input Characteristics

Display Range: NTC: –50°C to +110°C (–58°C to +230°F)
(on display with 3 digit + sign)
Accuracy: Better than 0.5% of full-scale + 1 digit
Resolution: 0.1°C (0.1°F up to 199.9 ; 1°F beyond)
Buzzer: YES (it depends on the model)
Analogue Input: EWPlus 902/961: 1 NTC input - EWPlus 971/974: 2 NTC inputs
Digital Input: 1 voltage-free digital input

Output Characteristics

Digital Output:

Model Relay Type of load

Power Supply 115V

a Power Supply 230Va

EWPlus 902:

OUT1 - N.O.

Resistive 8A 8A

Motor 1/8 Hp 1/2 Hp

OUT1 - N.C. Resistive 6A 6A

EWPlus 961: Compressor Motor 16 FLA / 96 LRA 12 FLA / 72 LRA

EWPlus 971:

Compressor Motor 16 FLA / 96 LRA 12 FLA / 72 LRA

Defrost - N.O.

Resistive 8A 8A

Motor 1/8 Hp 1/2 Hp

Defrost - N.C. Resistive 6A 6A

EWPlus 974:

Compressor Motor 16 FLA / 96 LRA 12 FLA / 72 LRA

Defrost - N.O.

Resistive 8A 8A

Motor 1/8 Hp 1/2 Hp

Defrost - N.C. Resistive 6A 6A

Fan

Resistive 3A 3A

Motor 1.4 FLA / 7.5 LRA 1.4 FLA / 7.5 LRA

Mechanical Characteristics

Housing: PC UL94 V-0 resin plastic casing, polycarbonate glass
Dimensions: Front 2-15/16” x 1-1/4” (74x32mm), depth 2-15/16” (59mm) (excluding terminals)
Terminals: Screw terminals for cable with a diameter of 13 AWG

(2.5mm2)
Connectors: TTL for connection to Copy Card
Humidity: Operating / Storage: 10 to 90% RH (not condensing)

13

Regulations

Electromagnetic compatibility: This device complies with Directive 2004/108/EC
Security: This device complies with Directive 2006/95/EC
Food safety: This device complies with standard EN 13485 as follows:

- suitable for storage

- application: air

- climate range A

- measurement class 1 in the range from -25°C to 15°C (-13°F to 59°F) (*)
(* exclusively using Eliwell NTC probes)
NOTE: The technical data included in this document, related to measurement (range, accuracy, resolution, etc.)
refer to the instrument itself, and not to its equipment such as, for example, sensors. This means, for example,
that sensor(s) error(s) shall be added to the instrument’s one.

TABLE OF PARAMETERS

PAR.

Liv. DESCRIPTION

SEt Temperature SEtpoint.

COMPRESSOR

diF 1&2

diFferential. Relay compressor tripping differential. The compressor stops on reaching the Setpoint
value (as indicated by the adjustment probe), and restarts at temperature value equal to the Setpoint
plus the value of the differential. Note: diF ≠ 0.

HSE 1&2 Higher SEt. Maximum possible setpoint value.

LSE 1&2 Lower SEt. Minimum possible setpoint value.

HC 2 The regulator will go to HOT operating mode (set to ‘H’) or COLD operating mode (set to ‘C’)

OSP 2

Offset Set Point. Temperature Value to be added to the Set-Point if reduced set is enabled
(Economy function).

dOd 2

digital (input) Open door. Digital input that allow you to switch off loads.
Valid if H11 = ±4 (door switch). n = does not switch off loads; y = switch off loads.

dAd 2 digital (input) Activation delay. Delay time in activating the digital input.

Ont 2

ON time (compressor). Compressor activation time in the event of faulty probe. If OFt=1 and
Ont=0, the compressor is always off, while if OFt=1 and Ont>0 it operated in duty cycle mode.

OFt 2

OFF time (compressor). Compressor deactivation time if probe is faulty. If Ont=1 and
OFt=0, the compressor is always on, while if Ont=1 and OFt>0 it operated in duty cycle mode.

14

dOn 2

delay (at) On compressor. Delay time in activating the compressor relay after switch-on of
instrument.

dOF 2

delay (after power) OFF. Delay after switch off; the indicated time must elapse between switch-off of
the compressor relay and the successive switch-on.

dbi 2

delay between power-on. Delay between switch-ons; the indicated time must elapse between
two successive switch-ons of the compressor.

OdO (!) 2

delay Output (from power) On. Delay time in activating the outputs after switch-on of the instrument
or after a power failure.

DEFROST

dty 1&2

defrost type. Type of defrosting.
0 = electric defrost - compressor off (OFF) during defrosting;
1 = reverse cycle defrost (hot gas); compressor on (ON) during defrosting;
2 = Free defrost; defrosting independently of compressor.

dit 1&2 defrost interval time. Interval between the start of two successive defrosting operations.

dCt 2

defrost Counting type. Selection of count mode for the defrosting interval.
0 = compressor operating hours (DIGIFROST® method);
Defrosting active only if compressor is on;
1 = Real Time - equipment operating hours; defrost counting is always active when the
machine is on and start everytime the instrument switch on;
2 = compressor stop. Each time the compressor stops a defrosting cycle is performed
according to parameter dtY.

dOH 2 defrost Offset Hour. Start-of-defrosting delay time from the call.

dEt 1&2 defrost Endurance time. Defrosting time-out; determines duration of defrosting.
dSt 1&2 defrost Stop temperature. Defrost stop temperature (defined by the evaporator probe).

dPO 2

defrost (at) Power On. Determines if at the start-up the instrument must enter defrosting (if
the temperature measured by the evaporator allows this operation). y = yes; n = no.

EVAPORATOR FAN

FPt 2

Fan Parameter type. Characterizes the ‘FSt’ parameter that can be expressed or as an absolute
temperature value or as a value related to Setpoint. 0 = absolute 1 = relative.

FSt 1&2

Fan Stop temperature. Fan lock temperature; if the value, read by the evaporator probe, is
higher than the set value, fans stop.

15

FAd 2 FAn differential. Fan starting differential (see par. ‘FSt’).

Fdt 1&2 Fan delay time. Delay time in activating fans after a defrost operation.

dt 1&2 drainage time. Dripping time.

dFd 1&2

defrost Fan disable. Allows to select the evaporator probes exclusion during defrost.
y = yes (fan disable); n = no.

FCO 2

Fan Compressor OFF. Allows to select compressor fans lock OFF (switched off).
y = fans activated (with thermostat; based on the value read by the defrost probe, see par. “FSt”); n =
fans off; dc = not used.

Fod 2

Fan open door. Fans active when the door is open.
Allows you to select the option of stopping the fans when the door is open, and re-starting the
fans when door is closed (if they were active). n = fans stop; y = fans unchanged.

ALARMS

Att 2

Allow you to select if the parameters HAL and LAL will have absolute (Att=0) or relative (Att=1)
value.

AFd 2 Alarm Fan differential. Alarm differential.
HAL 1&2

Higher ALarm. Maximum temperature alarm. Temperature value (in relative value) which if
exceeded in an upward direction triggers the activation of the alarm signal.

LAL 1&2

Lower ALarm. Minimum temperature alarm. Temperature value (in relative value), which if

exceeded in a downward direction, triggers the activation of the alarm signal.
PAO 2 Power-on Alarm Override. Alarm exclusion time after instrument switch on, after a power failure.
dAO 2 defrost Alarm Override. Temperature alarm exclusion time after defrost.

OAO 2

Alarm signaling delay after digital input disabling (door close). Alarm is only for high-low

temperature alarms.

tdO 2 time out door Open. Alarm activation delay time open door.

tAO 1&2 temperature Alarm Override. Temperature alarm signal delay time.

dAt 2

defrost Alarm time. Alarm for defrosting ended due to time out.

n = alarm deactivated; y = alarm activated.

EAL 2 External Alarm Clock. External alarm to lock loads (n = don’t lock loads; y = lock loads).

COMMUNICATION

dEA 2 Device address in family (valid values from 0 to 14).
FAA 2

Device family (valid values from 0 to 14). The FAA and dEA values represent the network address of

the equipment and are indicated in the following format “FF.DD” (where FF=FAA and DD=dEA).

16

DISPLAY

LOC 1&2

LOCk. Setpoint change shutdown. See related paragraph. There is still the possibility to enter
into parameters programming and modify these, including the status of this parameter to

permit keyboard shutdown. n = no; y = yes.
PS1 1&2 PAssword 1. When enabled (value ≠ 0) it constitutes the access key for level 1 parameters.
PS2 2 PAssword 2. When enabled (value ≠ 0) it constitutes the access key for level 2 parameters.

ndt 2 number display type. View with decimal point. y = yes; n = no.
CA1 1&2 CAlibration 1. Positive or negative temperature value added to the value read by probe 1.
CA2 1&2 CAlibration 2. Positive or negative temperature value added to the value read by probe 2.

ddL 1&2

defrost display Lock. Viewing mode during defrosting.
0 = shows the temperature read by the room probe;
1 = locks the reading on the temperature value read by room probe when defrosting
starts, and until the next time the Setpoint value is reached;
2 = displays the label “dEF” during defrosting, and until the next time the Setpoint value
is reached.

dro 2

display read-out. Select °C or °F for displaying the temperature read by the thermostat probe.
(0 = °C, 1 = °F).
PLEASE NOTE: the switch between °C and °F DO NOT modify setpoint, differential, etc.

(for example set=10°C become 10°F)

ddd 2

Selection of type of value to be displayed.
0 = Setpoint; 1 = cold room probe (Pb1); 2 = evaporator probe (Pb2).

CONFIGURATION

H08 (!) 2

Stand-by operating mode. 0 = display switch off;
1 = display switch off, loads and alarms stopped;
2 = display with OFF label, loads and alarms stopped.

H11 (!) 2

Configuration of digital inputs/polarity. 0 = disabled; ±1 = defrosting; ±2 = reduced set;
±3 = not used; ±4 = door switch; ±5 = external alarm; ±6 = Stand-by (ON-OFF).
ATTENTION!:

the “+” sign indicates that the input is activated when the contact is closed.

the “-” sign indicates that the input is activated when the contact is open.

17

H22 (!) 2

(Only EWPlus 971) Configurability of digital output 2 (B).

0 = Disabled; 1 = Compressor; 2 = Defrost; 3 = Fan; 4 = Alarm; 5 = AUX; 6 = Standby.
H23 (!) 2 (Only EWPlus 974) Configurability of digital output 3 (C). Same as H22.
H25 (!) 2 (Option) Enable/Disable the buzzer. 0 = Disabled; 4 = Buzzer; 1-2-3-5-6 = Not used.

H32 (!) 2

DOWN button configurability.

0 = disabled; 1 = defrost; 2 = not used; 3 = reduced set; 4 = stand-by.
H42 (!) 1&2 Evaporator probe present. n = not present; y = present.

reL 1&2 reLease firmware. Device version: read only parameter.

tAb 1&2 tAble of parameters. Reserved: read only parameter.

COPY CARD

UL 2 Up load. Programming parameter transfer from instrument to Copy Card.

Fr 2 Format. Erasing all data in the copy card.

(!) WARNING!

• If one or more of these parameters highlighted with (!) are modified, the controller must be switched off
and switched on again to ensure correct operation.

• Parameter H25 is present only in model with buzzer on board.

SUPERVISION

The device can be connected to:

• Telecontrol system TelevisSystem (°)

• ParamManager fast parameter setting software
The connection can be made via TTL serial port.

For connection to RS-485 bus use TTL/RS485 interface BusAdapter 150.
For connection to PC should be used:

• for TelevisSystem: PCInterface 1110/1120 with Televis license;

• for ParamManager: PCInterface 2150/2250 with ParamManager license;
(°) To configure the instrument for this purpose, use parameters “dEA” and “FAA” in the “Programming” menu.

NOTE: The instrument can be connected to TelevisSystem but the RVD function is not available.

18

CONNECTIONS

EWPlus 902 TERMINALS

OUT1 regulator relay OUT1

N-L Power Supply (115Va or 230Va)

A TTL input

EWPlus 961 TERMINALS

Compressor relay

N-L Power Supply (115Va or 230Va)

A TTL input

EWPlus 961EWPlus 902

N

L

3 6 7 9

10

D.I.

Power Supply

4VA max

Pb1

4 5 11

(thermostat)

LOAD

OUT1

A

TTL

W

PLU

S

902

N

L

2 3 9

10

D.I.

Pb1

4 11

(A)

(thermostat)

A

TTL

W

PLU

S

961

Power Supply

4VA max

19

CONNECTIONS

EWPlus 971 TERMINALS

Compressor relay

Defrost relay

N-L Power Supply (115Va or 230Va)

A TTL input

EWPlus 974 TERMINALS

Compressor relay

Defrost relay

Fans relay

N-L Power Supply (115Va or 230Va)

A TTL input

EWPlus 974EWPlus 971

N

L

2 3 6 7 8 9

10

D.I.

Pb1

4 5 11

Pb2

(A) (B)

(evaporator)

(thermostat)

A

TTL

W

PLU

S

971

Power Supply

4VA max

1

N

L

2 3 6 7 8 9

10

(C)

D.I.

Pb1

4 5 11

Pb2

(A) (B)

(evaporator)

(thermostat)

A

TTL

W

PLU

S

974

Power Supply

4VA max

20

Parameters - Default setting

PAR

EWPlus 902/961 EWPlus 971 EWPlus 974

M.U. Level

RANGE DEFAULT RANGE DEFAULT RANGE DEFAULT

SEt -50,0 ... 99,0 32,0 -50,0 ... 99,0 32,0 -50,0 ... 99,0 32,0 °C/°F
diF 0,1 ... 30,0 2,0 0,1 ... 30,0 2,0 0,1 ... 30,0 2,0 °C/°F 1&2

HSE LSE ... 230 99,0 LSE ... 230 99,0 LSE ... 230 99,0 °C/°F 1&2

LSE -55,0 ... HSE -50,0 -55,0 ... HSE -50,0 -55,0 ... HSE -50,0 °C/°F 1&2

HC H/C C flag 2

OSP -30,0 ... 30,0 0,0 -30,0 ... 30,0 0,0 -30,0 ... 30,0 0,0 °C/°F 2

dOd n/y n n/y n n/y n flag 2

dAd 0 ... 255 0 0 ... 255 0 0 ... 255 0 min 2

Ont 0 ... 250 0 0 ... 250 0 0 ... 250 0 min 2

OFt 0 ... 250 1 0 ... 250 1 0 ... 250 1 min 2
dOn 0 ... 250 0 0 ... 250 0 0 ... 250 0 secs 2
dOF 0 ... 250 0 0 ... 250 0 0 ... 250 0 min 2

dbi 0 ... 250 0 0 ... 250 0 0 ... 250 0 min 2

OdO 0 ... 250 0 0 ... 250 0 0 ... 250 0 min 2

dty 0/1/2 0 0/1/2 0 flag 1&2

dit 0 ... 250 6 0 ... 250 6 0 to 250 6 hours 1&2

dCt 0/1/2 1 0/1/2 1 0/1/2 1 num 2
dOH 0 ... 59 0 0 ... 59 0 0 ... 59 0 min 2

dEt 1 ... 250 30 1 ... 250 30 1 ... 250 30 min 1&2
dSt -50,0 ... 150 45,0 -50,0 ... 150 45,0 °C/°F 1&2

dPO n/y n n/y n n/y n flag 2

FPt 0/1 0 flag 2
FSt -50,0 ... 150 100,0 °C/°F 1&2

FAd 1,0 ... 50,0 2,0 °C/°F 2

Fdt 0 ... 250 0 min 1&2

dt 0 ... 250 0 0 ... 250 0 min 1&2

dFd n/y y flag 1&2
FCO n/y y flag 2

Fod n/y n flag 2

Att 0/1 1 0/1 1 0/1 1 flag 2

AFd 1,0 ... 50,0 2,0 1,0 ... 50,0 2,0 1,0 ... 50,0 2,0 °C/°F 2

21

PAR

EWPlus 902/961 EWPlus 971 EWPlus 974

M.U. Level

RANGE DEFAULT RANGE DEFAULT RANGE DEFAULT

HAL LAL ... 150,0 50,0 LAL ... +150,0 50,0 LAL ... 150,0 50,0 °C/°F 1&2

LAL -50,0 ... HAL -50,0 -50,0 ... HAL -50,0 -50,0 ... HAL -50,0 °C/°F 1&2
PAO 0 ... 10 0 0 ... 10 0 0 ... 10 0 hours 2
dAO 0 ... 999 0 0 ... 999 0 0 ... 999 0 min 2
0AO 0 ... 10 0 0 ... 10 0 0 ... 10 0 hours 2

tdO 0 ... 250 0 0 ... 250 0 0 ... 250 0 min 2

tAO 0 ... 250 0 0 ... 250 0 0 ... 250 0 min 1&2

dAt n/y n n/y n flag 2

EAL n/y n n/y n n/y n flag 2
dEA 0 ... 14 0 0 ... 14 0 0 ... 14 0 num 2
FAA 0 ... 14 0 0 ... 14 0 0 ... 14 0 num 2

LOC n/y n n/y n n/y n flag 1&2

PS1 0 ... 250 0 0 ... 250 0 0 ... 250 0 núm 1&2

PS2 0 ... 250 0 0 ... 250 0 0 ... 250 0 num 2

ndt n/y y n/y y n/y y flag 2
CA1 -12,0 ... 12,0 0,0 -12,0 ... 12,0 0,0 -12,0 ... 12,0 0,0 °C/°F 1&2
CA2 -12,0 ... 12,0 0,0 -12,0 ... 12,0 0,0 °C/°F 1&2

ddL 0/1/2 1 0/1/2 1 0/1/2 1 num 1&2

dro 0/1 1 0/1 1 0/1 1 flag 2
ddd 0/1/2 1 0/1/2 1 0/1/2 1 num 2
H08 0/1/2 2 0/1/2 2 0/1/2 2 num 2
H11 -6 ... +6 0 -6 ... +6 0 -6 ... +6 0 num 2
H22 0 ... 6 2 num 2
H23 0 ... 6 3 num 2

H25(!) 0 ... 6 4 num 2

H32 0 ... 4 0 0 ... 4 0 0 ... 4 0 num 2
H42 n/y y n/y y flag 1&2

rEL / / / / / / / 1&2

tAb / / / / / / / 1&2

UL / / / / / / / 2

Fr / / / / / / / 2

(!) WARNING!

Parameter H25 is present only in model with buzzer on board.

22

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
13 AWG (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 TTL serial cables should
be separated from, and not placed near power cables.

RESPONSIBILITY AND RESIDUAL RISKS

In addition to the exclusions provided in the Warranty terms, Invensys Controls shall not be liable for any
damages deriving from:

- Installation and/or use other than that prescribed and, in particular, that does not comply with applicable
regulatory and safety standards, including the standards provided herein;

- Installation and/or use on boards which do not guarantee adequate protection against electric shock,
water, dust, or access to dangerous parts;

- Installation and/or use on boards that do not comply with applicable regulatory and safety standards;

- tampering with and/or alteration of the products.

DISCLAIMER

This manual and its contents remain the sole property of Robertshaw Controls Company, d/b/a Invensys
Controls, and shall not be reproduced or distributed without the written permission of an authorized
representative of Invensys Controls. Although considerable care has been exercised in the preparation of this
document, Invensys Controls, its employees, agents, vendors, and any other third parties cannot and do not
accept any liability whatsoever in connection with its use, preparation, editing, or any misprints and errors
contained herein. Invensys Controls reserves the right to make changes to this document at any time without
prior notice.

23

WARRANTY ON EWPLUS 902/961/971/974 SERIES

Eighteen Months Limited Warranty
Invensys Controls warrants to the original contractor installer, or to the original consumer user, that each new

Eliwell Control will be free from defects in materials and workmanship under normal use and service for a
period of eighteen (18) months from the date of manufacture (the “Warranty Period”). If any Product fails within
the applicable Warranty Period, Invensys Controls shall, at its option, repair or replace the Product or credit
the purchase price, provided the Product is returned to Invensys Controls’ facility or designated agent within
the Warranty Period, with transportation or postage charges prepaid and proof of the date of purchase, and
the Product, upon examination by Invensys Controls, is found not to conform to the Warranty. Cost of Product
removal, labor, or reinstallation of new Product are not covered under this Warranty and are not the responsibility
of Invensys Controls. Warranty on Products, parts and/or components sold, but not manufactured by Invensys
Controls, shall be expressly limited to the warranty terms of the manufacturer of such products, parts and/or
components.

The above warranty does not apply to: i) batteries; ii) defects or damage that result from use of the Products in
other than their normal and customary manner; iii) defects or damage that result from use of the Products in
any manner other than in accordance with Invensys Controls’ recommendations and instructions; iv) defects or
damage which occur from misuse, alteration, accident, water, fire or neglect; and/or v) defects due to abuse or
damage such as burned contacts, stripped threads, split castings, improper installation or missing parts.

THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES, WHETHER
EXPRESS OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY, TITLE AND FITNESS
FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL INVENSYS CONTROLS BE LIABLE TO CONSUMER,
CONTRACTOR OR ANY THIRD PARTY FOR ANY CONSEQUENTIAL, INCIDENTIAL, SPECIAL, EXEMPLARY, OR
PUNITIVE DAMAGES ARISING FROM OR RELATING TO USE OF THE PRODUCT INCLUDING, BUT NOT LIMITED
TO, LOSS OF GOODWILL, LOSS OF PROFIT OR REVENUE, AND PROPERTY DAMAGE, REGARDLESS WHETHER
SUCH LOSS OR DAMAGE IS BASED IN CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY,
INDEMNITY, PRODUCT LIABILITY, OR OTHERWISE AND EVEN IF INVENSYS CONTROLS HAS BEEN ADVISED
OF THE POSSIBILITY OF SUCH DAMAGES.

24

WARRANTY ON EWPLUS 902/961/971/974 SERIES (Cont.)

REPAIR, REPLACEMENT, OR CREDIT OF THE PURCHASE PRICE, AS PROVIDED HEREIN, SHALL CONSTITUTE
BUYER’S SOLE RIGHTS AND REMEDIES WITH RESPECT TO DEFECTS IN THE PRODUCTS.

Some states do not allow the exclusion or limitation of incidental or consequential damages, or allow limitations
on how long an implied warranty lasts, so the above limitations or exclusions may not apply to you. This Warranty
gives you specific legal rights, and you may also have other rights which vary from state to state.

For Warranty returns, send controls, shipping prepaid and proof of date of purchase to:

Invensys Controls
Warranty Claims Department
515 S. Promenade
Corona, CA 91719

In Canada:
Invensys Controls
Warranty Claims Department
3505 Laird Road Unit #14
Mississauga, Ontario L5L 5Y7 Canada

25

Controles electrónicos para unidades de refrigeración

STAND-BY (ESC)

Pulsar y soltar

Regresa a un nivel anterior respecto al
menú actual
Confirma el valor del parámetro

Pulsar durante al menos 5 s

Activa la función Stand-by

(cuando no estoy dentro del menú)

Subir

Pulsar y soltar

Recorre las opciones del menú
Aumenta los valores

Pulsar durante al menos 5 s

Activa la función de descarche manual

Bajar

Pulsar y soltar

Recorre las opciones del menú
Aumenta los valores

Pulsar durante al menos 5 s

Función configurable por el usuario

(par. H32)

SET (ENTER)

Pulsar y soltar

Muestras las alarmas (si las hay)
Entra en el menú Estado Máquina

Pulsar durante al menos 5 s

Entra en el menú Programación
Confirma los mandos

set

TECLAS

EW

PLUS

902/961

EW

PLUS

971/974

ESPAÑOL

26

LED

SET Reducido / Economy

Intermitente: set reducido activado
Intermitente rápido: encendido con
parámetros de nivel 2
Off: en caso contrario

Led Compresor

Encendido fijo: compresor activado
Intermitente: retardo, protección o
activación bloqueada
Off: en caso contrario

Led Defrost (Descarche)

Encendido fijo: descarche activado
Intermitente: activación manual o desde E.D.
Off: en caso contrario

Led Ventilador

Encendido fijo: ventiladores activados
Off: en caso contrario

(sólo EWPlus 971 y EWPlus 974)

Led Alarma

Encendido fijo: presencia de una alarma
Intermitente: alarma silenciada
Off: en caso contrario

Led Estado HEAT

Encendido fijo: compresor en HEAT
Off: en caso contrario

(sólo EWPlus 902 y EWPlus 961)

NO UTILIZADO

(sólo EWPlus 902 y EWPlus 961)

Led Aux

Encendido fijo: salida Aux activada*
*según el modelo

(sólo EWPlus 971 y EWPlus 974)

Led °C

Encendido fijo: configuración en °C (dro = 0)
Off: en caso contrario

Led °F

Encendido fijo: configuración en °F (dro = 1)
Off: en caso contrario

Nota:

Si el instrumento está programado en modalidad Frío
(COOL), para poderlo utilizar en modalidad Calor
(HEAT) es necesario reprogramarlo con la Copy Card
debidamente configurada.
Lo mismo ocurre para pasar de Calor a Frío.

27

ACCESO Y USO DE LOS MENÚS

Los recursos están agrupados en dos menús a los que se accede como se indica a continuación:

• Menú “Estado Máquina”: pulsar y soltar la tecla

set

.

• Menú “Programación”: pulsar la tecla

set

durante más de 5 segundos.
Esperar 15 segundos sin utilizar el teclado (tiempo máximo) o pulsar una vez la tecla para confirmar el
último valor que aparece en el display y regresar a la página anterior.

MENÚ ESTADO MÁQUINA

Pulsar y soltar la tecla

set

para entrar en el menú “Estado Máquina”. Si no hay ninguna alarma activada, se

visualiza la etiqueta “SEt”. Pulsar las teclas

y para recorrer las carpetas del menú “Estado Máquina”:

- AL: carpeta de alarmas (sólo se visualiza si hay alarmas activadas);

- SEt: carpeta de configuración

- Pb1: carpeta del valor de la sonda 1;

- Pb2: carpeta del valor de la sonda 2 **;
(** sólo modelos EWPlus 971 y EWPlus 974)
Configurar el Setpoint: Para ver el valor del Setpoint, pulsar la tecla

set

mientras se visualiza la etiqueta
“SEt”. El valor del Setpoint aparecerá en el display. Para modificar el valor del
Setpoint, pulsar las teclas y antes de que transcurran 15 s. Para confirmar la
modificación, pulsar

set

.

Ver las sondas: Desde las etiquetas Pb1 o Pb2*, pulsar la tecla

set

para ver el valor medido por la

sonda asociada (* Pb2 sólo se visualiza en los modelos EWPlus 971 y EWPlus 974).

BLOQUEO DE MODIFICACIÓN DEL SETPOINT

El instrumento permite desactivar el funcionamiento del teclado.
El teclado se puede bloquear programando el parámetro “LOC”. Aunque el teclado esté bloqueado, es
posible acceder al menú “Estado Máquina” pulsando la tecla

set

y ver el Setpoint. El valor no se podrá

modificar. Para desbloquear el teclado, repetir el procedimiento de bloqueo.

set

set

set set

28

MENÚ DE PROGRAMACIÓN

Para entrar en el menú de “Programación”, pulsar durante más de 5 s la tecla

set

. Si está activada, el sistema
solicitará la CONTRASEÑA de acceso “PA1” para mostrar los parámetros de nivel 1 y “PA2” para mostrar los de
nivel 2 (ver apartado “CONTRASEÑA”). Al entrar en el menú, el display mostrará el primer parámetro (“diF”).
Pulsar las teclas

y para recorrer todos los parámetros del nivel actual:

5 sec

Seleccionar el parámetro deseado con las teclas y . Pulsar la tecla

set

para ver el valor actual del

parámetro. Utilizar las teclas y para modificar el valor y pulsar la tecla

set

para guardarlo.
NOTA: se recomienda apagar y volver a encender el instrumento siempre que se modifique la configuración de

los parámetros para evitar anomalías de funcionamiento en la configuración y/o los temporizadores activados.

CONTRASEÑA

Contraseña “PA1”: Autoriza el acceso a los parámetros de nivel 1. En la configuración estándar la contraseña

no está habilitada (valor = 0). Para habilitarla (valor ≠ 0) entrar en el menú Programación, pulsar las teclas y

para recorrer los parámetros hasta seleccionar la etiqueta “PS1”, pulsar

set

para ver el valor, modificarlo con

las teclas y y pulsar

set

para guardarlo. Si la contraseña está habilitada, el sistema la solicitará al entrar en

el menú “Programación”. Para introducirla, seguir la secuencia:

Contraseña “PA2”: Autoriza el acceso a los parámetros de nivel 2. En la configuración estándar está habilitada
(valor ≠ 0). Para modificar el valor, seguir las operaciones descritas para “PA1” y cambiar el valor del parámetro
“PS2”. La visibilidad de “PA2” es:

1) Si PA1 y PA2 ≠ 0: Pulsando la tecla

set

durante más de 5 s, “PA1” y “PA2” se visualizarán en el mismo nivel y será

posible acceder a los parámetros de nivel 1 o de nivel 2.

2) En los demás casos: La contraseña “PA2” se encuentra entre los parámetros de nivel 1. Si está habilitada, será
solicitada para acceder al nivel 2. Para introducirla, realizar las operaciones descritas para la contraseña “PA1”.

Si la contraseña introducida es incorrecta, el instrumento muestra la etiqueta PA1/PA2 y es necesario repetir la
secuencia de introducción.

set

setset

set

set

set