nano LINE
200NDIN4CK01
**
PEGO S.r.l.
Via Piacentina, 6/b - 45030 - ROVIGO
Tel : +39(0)425 762906 - Fax: +39(0)425 762905
www.pego.it - e-mail: [email protected]
200NDIN4CK01_02-19_ITA_ENG # Rev.02-19 # 03/07/2019
THERMOSTAT FUNCTION MODES (mOd)
The variable mOd allows the selection of function mode of the
thermostat, in particular:
- COLD MODE (mOd=0)
The DO1 output is activated when the temperature measured by
the ambient probe reaches or exceeds the SET POINT+r0 value and
remains active until the temperature drops below the SET POINT. In
this mode, the DO1 output is linked to the cold function icon.
dO3/dO4 can be configured as hot relay for neutral zone
management. The output is activated when the ambient
temperature is lower than SET POINT-r0 and remains active until
the temperature exceeds the SET POINT.
- HOT MODE (mOd=1)
The DO1 output is activated when the temperature measured by
the ambient probe reaches or exceeds the SET POINT-r0 value and
remains active until the temperature increases and exceeds the SET
POINT. In this mode, the DO1 output is linked to the hot function
icon; defrosting and fan stop FSt are DISABLED.
PASSWORD FUNCTION
The password function is activated by entering a value other than 0
for the PA parameter. See parameter P1 for various protection
levels. The protection is activated automatically if the keyboard
remains inactive for about 30 seconds. The figure 000 appears on
the display. Use the up/down keys to change the number and the
SET key to confirm. The password entry template 000 disappears if
the keyboard is not activated within 30 seconds. If you forget the
password, use the universal number 100.
EMERGENCY MODE IN THE CASE OF ERROR EO
This safety mode guarantees the functioning of the compressor
even in the case of a faulty ambient probe (error EO). If probe
errors E0 and CE1 are different to 0, the compressor functions in
operation pause mode, with compressor ON for the time CE1 and
OFF for the time CE2. If CE1>0 in the case of error E0, defrosting is
performed in normal functioning mode. If CE1=0 the emergency
mode in the presence of error E0 remains disabled. The compressor
remains off and defrosting is prevented to conserve the remaining
cold. Eliminate as soon as possible the cause of error E0 and
reactivate the control’s normal function for a correct temperature
adjustment.
MANUAL DEFROSTING ACTIVATION
To activate defrosting simply press the DOWN key for more than 30
seconds; this activates the heating elements relay. Defrosting is not
activated if the appropriate conditions are not present (end-of-
defrosting temperature (d21 or d22) set lower than the temperature
read by the evaporator probe). Defrosting terminates when the end-
of defrosting temperature (d21 or d22) is reached or for a maximum
defrosting time (d31 or d32) or by manually forced end-of-defrosting
(end-of-defrosting key or digital input).
Once the reset occurred, a BIP with the buzzer is provided to
confirm the occurred cancelation. To exit the menu, wait 10
seconds without pressing anything or press simultaneously the
up and down arrows.
HACCP variables are available in read-only mode and are the
following:
VARIABLE LIST HACCP LEVEL
(Values in read-only)
E##
Indicates the latest
activated
temperature alarm.
EH = high temperature alarm
EL = low temperature alarm
-- = no alarms have been
activated from the latest
reset
###
Temperature peak
value reached during
the latest EH or EL
alarm
-
45…+45°C
--- = no alarms have been
activated from the latest
reset
y##
Year of the start of
the last temperature
alarm
y 00
–
y99
y -- = no alarms have been
activated from the latest
reset
M##
Month of the start of
the last temperature
alarm
M 01
–
M12
M -- = no alarms have been
activated from the latest
reset
d##
Day of the start of the
last temperature
alarm
d 01
–
d31
d -- = nessun allarme
intervenuto dall’ultimo reset
h##
Hour of the start of
the last temperature
alarm
h 00
–
h24
h -- = no alarms have been
activated from the latest
reset
m##
Minutes of the start
of the last
temperature alarm
m 00
–
m59
m -- = no alarms have been
activated from the latest
reset
t##
Duration (hours) of
the latest
temperature alarm
t 00
–
t99
t -- = no alarms have been
activated from the latest
reset
C##
Counter of the nr of
temperature alarm
events occurred (being
memorized data of the
latest temperature
alarm event, the counter
is boosted to know if
previously other alarms
occurred. This counter
resets with the
memorized alarm reset
(silenced SET for
5 sec). It is implemented
at every new
temperature alarm).
C 00
–
C99
C -- = no alarms have been
activated from the latest
reset
DIAGNOSTICS
The display shows ‘orH’ for temperature ou
t of range
greater than +99.9°C. It shows
‘orL’ for temperature out of
range less than -45.0°C.
In the case of faults, the “Expert nano” control unit informs the
operator by means of alarm codes shown on the display and an
acoustic signal emitted by the buzzer (if present). The acoustic
alarm can be stopped by pressing the UP key (the error code
remains) and can be reactivated by pressing the SET key. In the
event of an alarm, one of the following messages is displayed:
ALARM CODE TABLE
Var
MEANING
E0
Functional fault of ambient probe.
Eu1
Functional fault of defrosting probe (in this case, any defrosting
processes will have a duration equal to time d31).
Eu2
Functional fault of defrosting probe (in this case, any defrosting
processes will have a duration equal to time d32).
E2
EEPROM memory error. All outputs are deactivated except for
alarm outputs if present.
E8
Man-in-room alarm.
Ec
Compressor protection alarm (e.g. thermal protection or max.
pressure switch). All outputs are deactivated except for the
alarm output if present.
Ed
Door open alarm. When the door switch opens and the tdo
time has elapsed, normal function of the control is reset,
triggering the door open alarm (Ed).
EL
Minimum temperature alarm. The letters EL flash alternating
with the temperature (see parameter A1).
EH
Maximum temperature alarm. The letters EH flash alternating
with the temperature (see parameter A2).
E9
Room light alarm. The letters E9 flash alternating with the
temperature (see parameter dO3 and Tdo).
E6
Clock failure alarm.
En
Communication error between the ECHO display and the
Master
MANUALLY FORCED END OF CURRENT DEFROSTING
Pressing the DOWN key for 3 seconds during defrosting forces
the end of the current defrosting. In the case of manual end-of-
defrosting, dripping is also excluded.
HOT GAS DEFROSTING
Set the parameter d1 = 1 or 2 for the management of inversion
defrost cycle. During the entire defrosting process the
compressor and defrost relays are activated. In this case, you can
not set defrost in succession, dd2 is forced to 0. During dripping
(d7) the compressor stops and, if d1 = 2, the defrost relays
remain activated in order to ensure the ignition of the
resistances of the basins. If d1 = 2 it may be necessary to add
external electromechanical components for proper control of
the solenoid valves.
For a correct control of the system, the installer must use the
defrost output which must allow the opening of the inversion
cycle electrovalve and closing of the liquid electrovalve. For
capillary systems (without thermostatic valve) it is sufficient to
control the inversion cycle electrovalve using the defrost relay
command.
HEATER DEFROST BY TIME WITH TEMPERATURE CONTROL
Set the parameter d1 = 3 for the management of heater defrost
by time with temperature control. During the defrost the outputs
are activated when the evaporator’s temperatures are lower
than d21 or d22. Defrost stops after d31 or d32 minutes. It allows
energy saving and a better defrost process.
AMBIENT TEMPERATURE DISPLAY DURING AND AFTER
DEFROSTING
During defrosting and for a minute following the
end of defrosting, the display continues to display the last
ambient temperature value read before start of defrosting.
RS-485 CONNECTION
Connection to a RS485 network must be chain type, avoiding
star connections and observing A and B polarity. It is advisable
to use BELDEN 8762 cables. The configuration of the device in
the TeleNET program is performed by entering the module
name such as “
Expert Nano4CK rel 3 or higher
” and assigning to
it the same network address entered in the variable Ad. For a
Modbus-RTU network connection and for details on the
protoco
ls of these devices, refer to the manual “
MODBUS-
RTU_EXP_DIN_NANO4CK
” which can be downloaded from our
internet site at www.pego.it.
HACCP ALARM MANAGEMENT
With ambient probe temperature ≤ A1 , after the Ald time, the
EL low temperature alarm is activated.
With ambient probe temperature ≥ A2 , after the Ald time, the
EH high temperature alarm is activated.
During a high or low temperature alarm, the display alternates
the visualisation of the temperature with the EH or EL headings;
the alarm relay is activated (if set), the Buzzer (silenceable) and
the alarm bell icon (flashing).
When the set alarm conditions are turned off, alarm signals
automatically undo (the alarm relay is deactivated, the buzzer is
silenced and the normal visualisation is reactivated).
The alarm bell icon remains on (fix) to indicate that EH or EL
alarm was triggered and the memorisation of the event (see
HACCP menu for displaying the latest temperature alarm
activated).To get the alarm, push the arrow button up when the
fix bell light is on.
Besides, the starting date of the latest EH or EL
event is registered, together with its duration and its maximum
or minimum reached temperature.
A counter of the nr of occurred alarms from the latest alarm
reset (max 99 alarms can be counted) is also present.
To display data related to the latest temperature alarm, enter in
the HACCP menu (push the arrow button up + stand-by for 3
seconds). Inside the menu, all the data can be scrolled with the
up and down arrows or they can be reset, by pressing the SET
arrow up button for 5 seconds.
E N G L I S H
ELECTRICAL CONNECTIONS
1 - 2
Power supply
3 - 4
DO4 Output (Default = room light)
5 - 6
Compressor Output
7 - 8
Fan Output
9 - 10
DO3 Output (Default =Defrost 1)
15 - 16 RS485 15-B 16-A
17 - 18 Digital Input 1
19
–
20 Evaporator probe 2 / Digital Input 2
21 - 22 Evaporator Probe 1
23 - 24 Ambient Probe
J2
Display ECHO
NOTE :
On
the electronic board, the jumpers are
already configured for the correct reading of
the inputs.
Their setting must not be changed.
J11=1-2
J21=1-2 J31=1-2
J12=1-2
J22=1-2
J32=1-2
J13=open J23=open J33=open
