200NANO3CF**
Termoregolatore elettronico / Electronic thermostat
Expert
nano LINE
Manuale d’uso e manutenzione / Use and maintenance manual
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]
200NANO3CF_01-19_ITA_ENG # Rev.01-19 # 18/02/2019
Manuale d’uso e manutenzione / Use and maintenance manual
LIST OF FIRST LEVEL VARIABLES (User level)
Var
MEANING
DEF.
r0
Temperature differential in relation to principal
SET-POINT
< Range: 0.2 ÷ 10°C >
Expressed in absolute values and defines hysteresis
(positive if mOd=0/2 or negative if mOd=1/3) of
temperature in relation to SET POINT.
2
d0
Defrosting interval
< Range: 0 ÷ 24 hours >
If d0=0 defrosting is excluded.
4
d2
Defrosting end set point
< Range:-35 ÷ 45°C >
Defrosting is not performed if the temperature read
by the defrosting probe is higher than value d2. (In
the event of a defective probe, defrosting is
performed on a time basis.)
15
d3
Maximum defrosting time
< Range: 1 ÷ 240 min >
25
d7
Dripping duration
< Range:0 ÷ 10 min >
At completion of defrosting the compressor and fans
remain inactive for the set period of time d7 and the
defrosting LED on the front of the board flashes.
0
F5
Fan stop after defrosting
< Range: 0 ÷ 10 min >
Keeps fans inactive for a period of time F5 after
dripping. This period is timed from the end of
dripping. If dripping is not set, the fans pause directly
after defrosting.
0
A1
Minimum temperature alarm
< Range: - 45 ÷ (A2-1)°C >
Absolute temperature referred to by the ambient
probe below which, following the ALD delay, the
LOW temperature alarm is triggered, activating the
buzzer (if present) and showing the letters EL
alternating with the temperature on the display, as
well as the flashing alarm icon.
-45
A2
Maximum temperature alarm
< Range: (A1+1) ÷ 99°C >
Absolute temperature referred to by the ambient
probe above which, following the ALD delay, the
HIGH temperature alarm is triggered, activating the
buzzer (if present) and showing the letters EH
alternating with the temperature on the display, as
well as the flashing alarm icon. When the alarm is
reset the alarm icon remains on without flashing to
indicate that the event occurred, until the UP key is
pressed.
99
tEu
Evaporator/condenser probe temperature display
< °C >
(does not display anything if dE =1)
reading
only
LIST OF SECOND LEVEL VARIABLES (Installer level)
Var
MEANING
DEF.
F3
Fan status with compressor off
< Range: 0 ÷ 1 >
0 = Fans in continuous operation
1 = Fans ON only with compressor ON
1
F4
Fan pause during defrosting
< Range: 0 ÷ 1 >
0 = Fans ON during defrosting
1 = Fans OFF during defrosting
1
Fst
FAN disable TEMPERATURE
(If dE = 0)
< Range: - 45 ÷ 99°C >
The fans remain disabled if the temperature value
read by the evaporator probe is higher than the value
of this parameter. The fans are re-enabled with the
evaporator probe deactivated or in error mode.
DIRTY CONDENSER temperature alarm
(If dE = 2)
<Range: -45
÷
99 ° C>
The control signals "Ech" alarm if the temperature
value read by the auxiliary probe is higher than the
value of this parameter. The "Ech" alarm does not
alter the operation of the controller.
45
Fd
Fst. differential
< Range:
1
÷
10°C
>
2
dE
Evaporator / auxiliary probe setting
< Range: 0 ÷ 2 >
0 = Evaporator probe
1 = Disabled
By excluding the evaporator probe, defrosting occurs
cyclically based on d0 period and terminates upon the
elapse of d3 time.
2 = alarm dirty condenser probe (see parameters
Fst and Fd).
0
d1
Defrosting type
< Range: 0 ÷ 1 >
0 = Heating element
1 = Cycle inversion (hot gas)
2 = Heater with temperature control
0
dPo
Defrost at Power-on
< Range: 0 ÷ 1 >
0 = Disabled
1 = Defrost at Controller power on (if possible)
0
dSE
Smart defrost
0 = disabled 1 = enabled
0
dSt
Smart defrost Setpoint (if dSE=1)
< Range: -30 ÷ 30°C >
The counting of the time between the defrosts is
incremented only if the compressor is ON and the
evaporator temperature is less than dSt.
1
C1
Minimum time between each turning off and on of
the compressor
< Range: 0 ÷ 15 min >
0
CE1
Duration of compressor ON time in the case of faulty
ambient probe
(emergency mode).
< Range: 0 ÷ 240 min / 0=Disabled >
If CE1=0 the emergency mode in the presence of error
EO remains disabled, the compressor remains off and
defrosting is prevented in order to conserve the
remaining cold.
0
CE2
Duration of compressor OFF time in the case of
faulty ambient probe
(emergency mode).
< Range: 5 ÷ 240 >
5
doC
Compressor timeout due to door switch opened
< Range: 0 ÷ 5 min >
When the door switch opens, the evaporator fans
turn off and the compressor continues to function
for a period doC, after which it turns off.
0
Tdo
Compressor re-activation time after door opened
< Range: 0 ÷ 240 min / 0=Disabled >
When the door switch opens and after the time
tdo, normal function of the control is restored,
generating the door open alarm (Ed).
0
mOd
Thermostat functioning mode
< Range: 0 ÷ 3 >
0 = Cold function (NTC probe)
1 = Hot function (NTC probe)
2 = Cold function (PTC probe)
3 = Hot function (PTC probe)
(if mode=1 or 3 defrosting and fan disable Fst are
excluded)
0
in1
Digital Input DI and activation mode setting
< Range: -6 ÷ 6 >
6= Stop defrosting remotely (N.O.)
(reads leading edge of impulse)
5= Start defrosting remotely (N.O.)
(reads leading edge of impulse)
4= Stand-by remotely (N.O.)
(In order to indicate Stand-By mode, the display
shows IN4 alternating with the current view)
3= Man-in-room alarm (N.O.)
2= Door switch (N.O.)
1= Compressor protection (N.O.)
0= Disabled
-1= Compressor protection (N.C.)
-2= Door switch (N.C.)
-3= Man-in-room alarm (N.C.)
-4= Stand-by remotely (N.C.)
(IN4 alternating with the current view is displayed
to indicate stand-by mode)
-5= Start defrosting remotely (N.C.)
(reads leading edge of impulse)
-6= Stop defrosting remotely (N.C.)
(reads leading edge of impulse)
1
dO2
Digital Output DO2 setting
< Range: 0 ÷ 3 >
0= Defrosting heating elements output
1= Room light output
2 = alarm - it opens when the alarm is triggered
3 = alarm - it closes when the alarm is triggered
0
LSE
Minimum value attributable to set point
< Range:
-45 ÷ (HSE-1) °C
>
-45
HSE
Maximum value attributable to set point
< Range:
+99 ÷ (LSE+1) °C
>
45
BEE
Buzzer enable
0 = disabled 1 = enabled
1
CAL
Ambient probe value correction
< Range:
-10 ÷ 10 °C
>
0.0
Ald
Delay time for signalling and display of minimum
and maximum temperature alarm
< Range: 0 ÷ 240 >
120
AtE
Temperature alarm Enable
0 = always enabled
1 = disabled if stand by active
2 = disabled if door switch active
3 = disabled if door switch or stand by active
0
Ad
Network address for connection to TeleNET or
Modbus supervision system
< Range:
0 ÷ 31 (SEr=0)
1 ÷ 247 (SEr=1) >
0
SEr
RS-485 communication protocol
0= TeleNET protocol
1= Modbus-RTU protocol
0
Bdr
Modbus baudrate
5
0 = 300 baud
1 = 600 baud
2= 1200 baud
3 = 2400 baud
4 = 4800 baud
5 = 9600 baud
6 = 14400 baud
7 = 19200 baud
8 = 38400 baud
P1
Password: protection type
( active when PA is different from 0)
0= Displays only the set point and allows alarm stop
1= Displays the set point, allows alarm stop, + defrost
+ light
2= Blocks access to levels 1 and 2 during programming
(all other functions permitted)
3= Blocks access to level 2 during programming (all
other functions permitted)
3
PA
Password
(see P1 for protection type)
< Range: 0 ÷ 999 / 0=Disabled >
0
reL Release software
read
only
THERMOSTAT FUNCTION MODES (mOd)
The variable Mod allows the selection of function mode of the
thermostat, in particular:
COLD MODE (Mod =0 NTC or Mod =2 PTC)
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.
HOT MODE (Mod=1 NTC or Mod=3 PTC)
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.
DIGITAL OUTPUT FUNCTION SETTINGS (dO2)
The variable dO2 allows the allocation four possible functions to
digital output DO2 on the basis of its value: 0=defrosting heating
elements output, 1=room light output, 2= opens when the
alarm is triggered and 3= closes when the alarm is triggered.
In systems with off-cycle or fan defrosting, therefore, dO2=1 can
be set to enable the UP key function for the room light. If this key
is pressed for longer than 3 sec, it activates/deactivates the room
light (output DO2) and controls the relative ROOM LIGHT icon. If
the light is manually turned on/off, a BIP is generated as
confirmation. When configured for the room light, the dO2
output is automatically activated when the door switch input is
active or the man-in-cell alarm is triggered (E8). Set dO2=2 or
dO2=3 to configure DO2 as alarm, as an alternative to defrost or
light output.
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 E0
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 3
seconds; this activates the heating elements relay. Defrosting is not
activated if the appropriate conditions are not present (end-of-
defrosting temperature (d2) set lower than the temperature read
by the evaporator probe). Defrosting terminates when the end-of
defrosting temperature (d2) is reached or for a maximum
defrosting time (d3) or by manually forced end-of-defrosting (end-
of-defrosting key or digital input).
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 to control inversion cycle defrosting.
During the entire defrosting process the compressor and defrost
relays are activated. 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 = 2 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 d2. Defrost stops after d3
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 Nano 3 CF device
” and assigning to it the
same network address entered in the variable Ad. For a
Modbus-RTU network connection and for details on the
protocols of these devices, refer to the manual “MODBUS-RTU_
NANO_3CF” which can be downloaded from our internet site at
www.pego.it
.
DIAGNOSTICS
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.
E1
Functional fault of defrosting probe (in this case, any defrosting
processes will have a duration equal to time d3) or condenser
probe.
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).
Ech
Dirty condenser alarm (dE = 2). Non-blocking.
E N G L I S H
