EVCO EVR274N9 User Manual

Page 4

EVCO S.p.A. | Code 104R200E114 | Page 4 of 10 | PT 14/13 | version 1.1

°F

degree Fahrenheit LED
if on, the temperatures will be displayed using the
degree Fahrenheit grade unit of measurement;
see parameter P2
if flashing, the “energy saving” function is in progress
(with effect only on the compressor)
On/stand-by LED
if it is on, the device will be off ( “stand-by”
state)
if it is off, the device will be on (“on” state)

9.2

Signal Descriptions/Explanations

Code Part

rhL

operation for a low percentage of relative humidity
in progress

rhH

operation for a high percentage of relative humidity
in progress

Loc

the keyboard is blocked; see paragraph 3.12
the work set-point is blocked; see parameter r3

- - -

the operation requested is not available

ALARMS

10.1

Alarms

Code Part

Minimum alarm temperatures (HACCP alarms)
Solutions:
-

check the temperature associated to the
alarm; see parameters A0, A1 and A2

Main consequences:
-

if parameter A0 is set to 0, the device will
store the alarm

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

Maximum temperature alarm (HACCP alarms)
Solutions:
-

check the cell temperature; see parameters
A4 and A5

Main consequences:
-

the device will memorise the alarm

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

Door microswitch input alarm (HACCP alarms)
Solutions:
-

check the causes of the activation of the in-
put; see parameters i0, i1, i5 and i6

Main consequences:
-

the effect established with the parameters i0
and i5

if parameter is set to 1, the device will store the
alarm, provided parameter i2 is not set to -1

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

Multifunction input alarm
Solutions:
-

check the causes of the activation of the in-
put; see parameters i0, i1, i5 and i6

Main consequences:
-

the effect established with the parameters i0
and i5

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

iSd

Pressure switch alarm
Solutions:
-

check the causes of the activation of the in-
put; see parameters i0, i1, i5, i6, i7, i8 and i9

switch off and re-start the device or suspend
the power supply

Main consequences:
-

the regulators will switch off

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

Mains voltage alarm
Solutions:
-

check the mains voltage; see parameters C14,
C15 and C16

Main consequences:
-

the compressor will be switched off and will
not be switched on

Compressor forced switch-on alarm
Solutions:
-

check the mains voltage; see parameter C18

Main consequences:
-

the device will perform forced compressor
switch-on; the device restores normal display
when the temperature of the cell reaches the
work set-point.

COH Condenser overheated alarm.

Solutions:
-

check the condenser temperature; see pa-
rameter C6

Main consequences:
-

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

the condenser fan will be on (only if param-
eter u0/u1 is set at 6)

CSd

Condenser overheated alarm.
Solutions:
-

check the condenser temperature; see pa-
rameter C7

switch the device off and back on again: if
when the device is switched back on, the
temperature of the condenser is still higher
than that established in parameter C7, dis-
connect the power supply and clean the con-
denser

Main consequences:
-

the compressor and the evaporator fan will be
switched off

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

the condenser fan will be on (only if param-
eter u0/u1 is set at 6)

dFd

Defrosting alarm switched off because maximum
time has been reached
Solutions:
-

heck the integrity of the evaporator probe;
see parameters d2, d3 and d11

press a key to restore normal display

Main consequences:
-

the device will continue to operate normally.

When the cause of the alarm disappears, the device restores
normal operation, except for the following alarms:
-

pressure switch alarm (code “iSd”) which requires the
switching off of the device or the temporary suspension
of the power supply

compressor blocked by condenser temperature alarm
(code “CSd”) which requires the switching off of the
device or the temporary suspension of the power supply

the compressor forced switch-on alarm (code “CF”)
that requires the cell temperature to have reached the
work set-point

Defrosting alarm switched off because maximum time
has been reached (code “dFd”) which requires the
pressing of a key.

ERRORS

11.1

Errors

Code Part

Pr1

Cell probe error
Solutions:
-

check that the probe is the PTC or NTC type;
see parameter P0

check the device-probe connection

check the cell temperature

Main consequences:
-

compressor activity will depend on param-
eters C4 and C5

the defroster will not be activated

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

the door resistors will be switched off (only if
the parameter u0/u1 is set at 4)

the evaporator valve will be deactivated (only
if parameter u0/u1 is set at 5)

Pr2

Evaporator probe error
Solutions:
-

the same as the preceding case but with re-
spect to the evaporator probe

Main consequences:
-

if parameter P3 is set to 1, the defrosting
period will last for the amount of time set with
parameter 3

if parameter P3 is set to 1 and parameter d8
is set to 2 or to 3, the device will operate as if
parameter d8 were set to 0

if parameter F0 is set to 3 or 4, the device will
operate as if the parameter were set to 2

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

Pr3

Condenser probe error.
Solutions:
-

the same as the preceding case but with re-
spect to the condenser probe

Main consequences:
-

condenser overheated alarm (code “COH”)
will not be activated

the compressor blocked alarm (“CSd” code)
will never be activated

the alarm output will be activated (only if
parameter u0/u1 is set at 3)

the condenser fan will operate parallel tot the
compressor (only if parameter u0/u1 is set at
6)

When the problem that caused the alarm disappears, the
device is restored to normal operation.

TECHNICAL DATA

12.1

Technical data

Purpose of the command device: operating command
device.
Construction of the command device: built-in electronic
device.
Case: grey self-extinguishing.
Dimensions: 180.0 x 38.0 x 44.0 mm (7.086 x 1.496 x
1.732 in; L x H x D).
Method of mounting the command device: panel, with
elastic retaining wings.
Protection rating: IP55.
Connections: 6.3 mm faston (0.248 in, power supply and
outputs), removable screw terminal board (inputs), 6 pole
connector (serial port).
The maximum length of the analogue input and digital input
connection cables must be less than 10 m (32.808 ft).
Operating temperature: from 0 to 55 °C (from 32 to 131 °F).
Storage temperature:from -25 to 70 °C (from -13 to
158 °F).
Humidity for use: from 10% to 90% relative humidity
without condensate.
Command device pollution situation: 2.
Power supply (according to the model):
-

115... 230 VAC (+10% -15%), 50/60 Hz, 5.5 VA max

230 VAC (+10% -15%), 50/60 Hz, 3 VA max.

Rated impulse voltage: 4K V.
Overvoltage category:
-

II in models with power supply of 115... 230 VAC

III in models with power supply of 230 VAC.

Class and structure of software: A.
Analogue inputs:
-

1 input (cell probe) in EVR221, EVR231, EVR261 and
EVR271 models, can be set via configuration parameter
for PTC/NTC probes

2 inputs (cell probe and evaporator probe) in EVR202,
EVR232, EVR203, EVR233, EVR263, EVR273, EVR204,
EVR234, EVR264 and EVR274 models, can be set via
configuration parameter for PTC/NTC probes.

PTC type analogue inputs (990 Ω @ 25°C, 77°F)
Type of sensor:

KTY 81-121.

Measurement field:

from -50 to 150 °C
(from -58 to 302°F).

Resolution:

0.1 °C (1 °F).

Protection:

none.

PTC type analogue inputs NTC (10K Ω @ 25°C, 77°F)
Type of sensor:

ß3435.

Measurement field:

from -50 to 105 °C (from -40
t

220 °C).

Resolution:

0.1 °C (1 °F).

Protection:

none.

Digital inputs: 1 input (door micro/multi-function 1 switch),
which can be set via configuration parameter due to normally
open contact/normally closed contact (free of voltage contact,
5 VDC, 2 mA)
Digital inputs
Power:

none.

Protection:

none.

Other inputs (in EVR204, EVR234, EVR264 and
EVR274 models only): 1 input that can be set via
configuration parameter for analogue input (condenser
probe)/digital input (door microswitch/multifunction 2), with
the same technical features illustrated previously.
Displays: custom 3 digit display with function icon.
Digital outputs:
1 output (electromechanical relay) in EVR221, EVR231,
EVR261 and EVR271 models
-

1 x 30 A res. output @ 250 VAC type SPST (K1) for
compressor management in models with power supply
of 115... 230 VAC, 1 x 16 A in-rush res. output @ 250
VAC type SPST (K1) for compressor management in
models with power supply of 230 VAC.

2 outputs (electromechanical relays) in EVR202 and EVR232
models
-

1 x 8 A res. output @ 250 VAC type SPDT (K2) for
management of the cell light, demisting resistors, aux.
output, alarm output, door resistors, evaporator valve,
evaporator fan or defrost.

This manual is related to the following products:

EVR273N9 EVR271N7 EVR264N7 EVR263N7 EVR261N7 EVR234N9 EVR233N9 EVR232N7 EVR231N7 EVR221N7 EVR204N7 EVR203N7 EVR202N7