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PAR.

DESCRIPTION

RANGE

DEFAULT

VALUE*

LEVEL**

U.M.

Configuration- CnF label

EWDR 981 

7/8

H21

Digital output configurability (C): 
0= disabled

1= compressor 

2= defrosting

3= fans 

4= alarm

5= auxiliary 

6= stand-by

7= light 

8= buzzer

9= defrosting on 2nd 

evaporator

0...9

1

2

num

H31   

UP button configurability 
0=disabled    

1=defrosting 

2=auxiliary

3=reduced set point 

4=disabled

5=disabled 

6=light

7=stand-by 

8= maintenance request

H32

DOWN button configurability 
Same as H31(0=disabled default)

0...8

0

2

num

H33

ESC button configurability 
Same as H31(0=disabled default)

0...8

0

2

num

0...8

1

2

num

H41

Presence of control probe: 
n= not present

y= present

n/y

y

2

num

H43

Presence of display probe: 
n= not present

y= present (display probe)

n/y

y

2

flag

PA2***

in the CnF folder when you enter the correct password you can access level 2 parameters from label PA2 by pressing the “set” button

rEL

Device version. Read only parameter

/

/

1

/

tAb

Parameter table; Reserved; Read only parameter

/

/

1

/

Copy Card

Fpr label

UL

Transfer of parameter map from instrument to 
Copy Card

dL

Transfer of parameter map from Copy Card to 
instrument

Fr  (6)

Formatting. Cancels all data in the Copy Card

/

/

1

/

/

/

1

/

/

/

1

/

NOTES:

(1) See Duty Cycle diagram
(2) If relative values are present (par. Att=1) parameter HAL is set to positive values and the parameter LAL is set to negative values (-LAL)
(3) Refers exclusively to high and low temperature alarms
(4) when changing from °C to °F or vice versa the set points, differentials, etc. are NOT converted (for example, “set=10 °C becomes set=10°F”)
(5) CAUTION: positive or negative values change polarity, Positive values: active input when contact is closed; Negative values: active input when contact is open.
(6) If the Fpr parameter is used, the data previously stored on the Copy Card will be permanently lost. 

This operation cannot be undone

* Value: to be compiled manually by user with any custom settings (if different from default settings)
** Level: indicates the visibility level of parameters accessed using a password (see relevant paragraph)
*** PA2 is visible at level 1 in the CnF folder whereas it can be modified at level 2 in the diS folder

H25  

Digital output configuration. (E) Same as H11.

0...9

4

2

num

if alarm(s)

 present

AL

Pb1

SEt

set

alarms

Pb1 value

SEt value

set

change SEt

value

show alarms

press and release

(quickly/single press)

Pb3

Pb3 value

is present

MACHINE STATUS MENU

Ont, OFt parameters programmed for
Duty Cycle

Ont

OFt

Compressor output

0

0

OFF 

0

>0

OFF

>0

0

ON

>0

>0

dc

OUT

On

Off

OFt

Ont

Ont

The error condition for probe 1 

(compressor) causes the following:
- E1 code appears on display
- the controller is activated as indicated by

the “Ont” and 
“OFt” parameters if programmed for 
Duty Cycle

DUTY CYCLE DIAGRAM

Summary of Contents for EWDR 981

Page 1: ... main menu level The set point setting folder is also closed when the time out elapses Alarm on If an alarm condition exists when the Machine Status menu is accessed the ALfolder label appears PARAMETER PROGRAMMING MENU Access the menu by pressing the set button for at least 5 seconds The menu structure enables all parameter folders to be divided into two levels All the level 1 folders can be acce...

Page 2: ...eter OFL Y DIAGNOSTICS PROBE ALARMS When one of the probes is outside the nominal operating range or the probe is open or has shorted an alarm is generated if at least one of these conditions persists for at least 10 seconds If at least one of these 3 alarms is signalled the alarm LED and relay are enabled When activated code E1 appears on the display If several alarms are activated at the same ti...

Page 3: ...ded using an ordinary bipolar cable note that if probes are extended this affects the electromagnetic compatibility EMC of the instrument special care must be used when wiring The TTL serial cable must be kept separate from the power cables EWDR 981 3 8 CONDITIONS OF USE PERMITTED USE For safety reasons the instrument must be installed and used in accordance with the instructions supplied Users mu...

Page 4: ... min dbi Delay between switch ons the specified time must elapse between two subsequent switch ons 0 250 0 1 2 min OdO Delay in activating outputs after start up of instru ment or after a power failure Not active if 0 0 250 0 1 2 min dty Type of defrost 0 electrical defrosting 1 cycle reversing defrosting hot gas 2 Free mode defrosting compressor disabled 0 1 2 0 1 2 num dit Period of time elapsin...

Page 5: ...is regulated by Att below which the alarm is activated 50 0 HAL 50 0 1 2 C F PAO 3 Alarm exclusion time after start up of instrument following a power failure 0 10 0 1 2 hours dAO Alarm exclusion time after defrosting 0 999 0 1 2 min EWDR 981 5 8 OAO High and low temperature alarm delay after disabling digital input door closed 0 10 0 2 hours tdO Time out after alarm signal when digital input is d...

Page 6: ...to temperature displayed that is also used by controllers 0 1 2 2 2 num LdL Minimum value that can be displayed 55 0 140 50 0 2 C F HdL Maximum value that can be displayed 50 0 302 140 0 2 C F ddL display during defrosting 0 displays temperature read by thermostat control probe 1 displays temperature read entering defrost cycle until set point is reached 2 displays dEF label during defrosting unti...

Page 7: ...s set to positive values and the parameter LAL is set to negative values LAL 3 Refers exclusively to high and low temperature alarms 4 when changing from C to F or vice versa the set points differentials etc are NOT converted for example set 10 C becomes set 10 F 5 CAUTION positive or negative values change polarity Positive values active input when contact is closed Negative values active input w...

Page 8: ...NG DIAGRAM TERMINALS 1 2 Probe input 1 room probe 1 4 Probe input 3 display or 2nd evaporator probe 5 6 Digital input 1 5 7 Digital input 2 8 9 Auxiliary output 12Vc 20mA E see par H25 alarm default 13 14 Power supply 230Va A TTL input for Copy Card 20 21 22 N O relay output C see par H21 compressor default 19 22 N C relay output C see par H21 compressor default EWDR 981 1 2 4 5 6 7 8 9 10 11 12 1...

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