Pego 200NDINFSC Operating instructions

Chapter. 1 –Introduction DIN NANO FSC
USER AND MAINTENANCE MANUAL
Page 1
REV. 01/04
User and maintenance manual
ENGLISH
ELECTRICAL BOARDS FOR REFRIGERATING INSTALLATIONS
READ AND KEEP
REV. 03-18
ENG
200NDINFSC
Electronic regulator on DIN bar
to manage condenser fans

DIN NANO FSC Contents
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 2
INTRODUCTION
Page 3 1.1 General
Page 3 1.2 Product identification codes
Page 4 1.3 Overall dimensions
Page 4 1.4 Identification data
INSTALLATION
Page 5 2.1 General rules for the installer
Page 5 2.2 Standard equipment for assembly and use
Page 6 2.3 Installation of the board
TECHNICAL CHARACTERISTICS
Page 7 3.1 Technical characteristics
WARRANTY
Page 8 4.1 Warranty
DATA PROGRAMMING
Page 9 5.1 Control panel
Page 9 5.2 Front keypad
Page 10 5.3 LED display
Page 11 5.4 Combination of keys
Page 12 5.5 Setting and viewing the set point
Page 12 5.6 Level 1 programming
Page 12 5.7 List of Level 1 variables
Page 14 5.8 Level 2 programming
Page 14 5.9 List of Level 2 variables
Page 17 5.10 Level 3 programming
Page 17 5.11 List of Level 3 variables
Page 18 5.12 Operating mode
Page 18 5.12.1 Normal mode
Page 19 5.12.2 Energy saving mode
Page 20 5.12.3 Low noise mode
Page 21 5.12.4 Fixed speed mode
Page 22 5.13 night / day function
Page 22 5.14 Password function
Page 22 5.15 Temperature table for refrigerant fluids
OPTIONS
Page 23 6.1 TeleNET monitoring/supervision system
Page 23 6.2 Network configuration with Modbus-RTU protocol
DIAGNOSTICS
Page 24 7.1 Diagnostics
ANNEXES
Page 25 A.1 EU Declaration of Conformity
Page 26 A.2 Connection diagram
REV. 01/04
CHAP. 1
CHAP. 2
CHAP. 3
CHAP. 4
CHAP. 5
CHAP. 6
CHAP. 7
CONTENTS

CAP. 1 - Introduzione DIN NANO FSC
Page 3
USER AND MAINTENANCE MANUAL
Rev. 03-18
GENERAL INFORMATION
DESCRIPTION:
The DIN NANO FSC is a DIN rail electronic regulator which optimizes the management of
the condenser fans. It helps reduce energy consumption by regulating the condensation
temperature according to the external temperature. It can also reduce the sound emissions
from the condensing fans during the night, slowing down the fans if the external
temperature drops.
APPLICATIONS:
-Control for electronic fans used on condensing units.
-Control for phase-cutting voltage regulators used to manage the condensation fan
speed.
MAIN FEATURES.
-0-10 V analog output for speed control of the condenser fans
-Regulation with pressure or temperature probe
-Acquisition of outside temperature to optimize the control
-4 operating modes:
onormal mode.
oenergy saving.
olow noise of fans.
oconstant speed (adjustable).
-Night / day function (change of condensation setpoint).
-View of the pressure transducer reading in Bar or in °C (depending on the type of
selected refrigerant gas).
-3-digit LED display with sign, decimal point and system status icons.
-RS485 serial connection with Modbus-RTU or Telenet protocol.
-PEGO programming criteria that guarantees immediate start-up.
-Supply voltage 230Vac.
PRODUCT IDENTIFICATION CODES
200NDINFSC01 Electronic regulator on DIN bar for the optimized
management of the fans of the condensing group
CHAPTER 1: INTRODUCTION
1.1
1.2

DIN NANO FSC Chapter 1 –Introduction
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 4
OVERALL DIMENSIONS
Dimensions in mm.
IDENTIFICATION DATA
The device described in this manual has a plate on one side bearing the identification
data:
•Name of Manufacturer
• Code and model of the device
• Serial number
• Date of manufacture
1.3
1.4
DIN NANO FSC
200NDINFSC01

Chapter. 3 –Technical Characteristics DIN NANO FSC
Page 5
USER AND MAINTENANCE MANUAL
Rev. 03-18
GENERAL RULES FOR THE INSTALLER
1. Install the device in an area that ensures the correct degree of protection, and take all
due care when drilling holes in the box for the cable glands and/or hoses;
2. Avoid using multi-pole cables with conductors connected to inductive and power
conductors and signal conductors like probes and digital inputs;
3. Avoid inserting ducts and power cables with signal cables (sensors and digital inputs) in
these.
4. Minimize the length of the connecting cables to prevent these from coiling up and
adversely affecting the electronics through induction;
5. All the conductors of the cables must be of an appropriate size to withstand the required
load;
6. When extensions are needed for the sensors, it is necessary to use conductors of a
suitable size measuring no less than 1mm². Extension or shortening of the probes may
alter the factory settings; use an external thermometer, therefore, for testing and
calibration.
STANDARD EQUIPMENT FOR ASSEMBLY AND USE
The DIN NANO FSC electronic controller is provided with the following for assembly and
use:
• Nr 1 User manual.
2.1
2.2
CHAPTER 2: INSTALLATION

DIN NANO FSC Chapter 1 –Introduction
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 6
INSTALLATION OF BOARD
Fig. 1: Install the module on the DIN
guide and close the bottom clamp to
hold it in place.
Make all the electrical connections with reference to the diagrams of the relative model (see the
relative tables in the ANNEXES). During the cabling process, it is advisable to keep the power
conductors isolated from the signal conductors.
2.3

Chapter. 3 –Technical Characteristics DIN NANO FSC
Page 7
USER AND MAINTENANCE MANUAL
Rev. 03-18
TECHNICAL CHARACTERISTICS
Power supply
Voltage
230 V~ 10% 50/60Hz
Max power consumption (electronic controller
only)
~ 5 VA
Climatic conditions
Operating temperature
-5 ÷ +50 °C
Storage temperature
-10 ÷ +70 °C
Relative ambient humidity
Less than 90% RH
General features
Compatible type of pressure sensor:
pressure sensor: 4/20mA
Compatible type of temperature sensor:
NTC 10Kohm 1% @ 25°C
Output features (voltage-free contact)
Description
Relay installed
Features of output board
Fans enable
(Relay 16A AC1)
16(6)A 250V~
Not used
(Relay 16A AC1)
16(6)A 250V~
Not used
(Relay 8A AC1)
8(3)A 250V~
Alarm
(Relay 8A AC1)
8(3)A 250V~
Dimensional features
Dimensions
12.15cm x 7.1cm x 10.5cm (HxPxL)
Insulation and mechanical properties
Degree of protection of front console
(remote-controlled by the power section if
assembled on front of board)
IP65
Material of boxes
PC+ABS self-extinguishing UL94 V-0
Type of insulation
Classe II
CHAPTER 3: TECHNICAL CHARACTERISTICS
3.1

Chapter 4 –Warranty DIN NANO FSC
USER AND MAINTENANCE MANUAL
Page 8
WARRANTY
The electronic controls of the DIN NANO series are covered by a 24-months warranty
against all manufacturing defects as from the date indicated on the product ID code.
In case of defect the product must be appropriately packaged and sent to our production
plant or to any authorized Service Center with the prior request of the Return Authorization
Number.
Customers are entitled to have defective products repaired, spare parts and labour
included. The costs and the risks of transport are at the total charge of the Customer.
Any warranty action does not extend or renew its expiration.
The Warranty does not cover:
Damages resulting from tampering, impact or improper installation of the product and
its accessories.
Installation, use or maintenance that does not comply with the instructions provided
with the product.
Repair work carried out by unauthorized personnel.
Damage due to natural phenomena such as lightning, natural disasters, etc…
In all these cases the costs for repair will be charged to the customer.
The intervention service in warranty can be refused when the equipment is modified or
transformed.
Under no circumstances Pego S.r.l. will be liable for any loss of data and information,
costs of goods or substitute services, damage to property, people or animals, loss of sales
or earnings, business interruption, any direct, indirect, incidental, consequential,
damaging, punitive, special or consequential damages, in any way whatsoever caused,
whether they are contractual, extra contractual or due to negligence or other liability arising
from the use of the product or its installation.
Malfunction caused by tampering, bumps, inadequate installation automatically declines
the warranty. It is compulsory to observe all the instructions in this manual and the
operating conditions of the product.
Pego S.r.l. disclaims any liability for possible inaccuracies contained in this manual if due
to errors in printing or transcription.
Pego S.r.l. reserves the right to make changes to its products which it deems necessary
or useful without affecting its essential characteristics.
Each new release of the Pego product user manual replaces all the previous ones.
As far as not expressly indicated, is applicable the Law and in particular the art. 1512 C.C.
(Italian Civil Code).
For any controversy is elected and recognized by the parties the jurisdiction of the Court of
Rovigo.
4.1
CHAPTER 4: WARRANTY

Chapter. 6 –Options DIN NANO FSC
Page 9
USER AND MAINTENANCE MANUAL
Rev. 03-18
CONTROL PANEL
FRONT KEYPAD
(1)
UP KEY
Increases value / Scrolls up through parameters
Acquires an alarm.
(2)
DOWN KEY
Decreases value / Scrolls down through parameters.
(3)
STAND-BY
If pressed for more than 1 second, the Stand-by state will alternate with the normal
operating status, and vice versa. In the stand-by state, the system stops and the display
will change the writing OFF with the current view.
If pressed, it switches the display view from °C to Bar and vice versa.
(4)
SET
Shows the set point
Enables configuration of the set point when pressed together with the Down or UP key.
CHAPTER 5: DATA PROGRAMMING
5.1
5.2
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(10)
(14)
(8)
(11)
(9)
(12)
(13)

DIN NANO FSC Chapter 5 –Data Programming
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 10
DISPLAY LED
(5)
Shows the values / parameters
(6)
"OUTPUT Nr.1” ICON
ON=analogue output between 0.1 and 3.3V.
(7)
"OUTPUT Nr.2" ICON
ON=analogue output between 3.4 and 6.6V.
(8)
"OUTPUT Nr.3" ICON
ON = analogue output > 6.6V.
(9)
"PRG" ICON
Flashing LED = Programming (or SET POINT change)
(10)
---
(11)
"CONDENSER FAN CONTROL" ICON
LED ON = Condenser Fan Control ENABLED
(12)
"UNIT OF MEASURE IN DEGREES CELSIUS" ICON
LED ON = Unit of measure in degrees Celsius of the viewed value.
(13)
"UNIT OF MEASUREMENT IN BAR" ICON
LED ON = Unit of measure in Bar of the viewed value.
(14)
ALARM IN PROGRESS ICON
LED OFF = No alarm triggered
LED ON = Alarm triggered and then cancelled
Blinking LED = Alarm in progress
5.3

Chapter. 6 –Options DIN NANO FSC
Page 11
USER AND MAINTENANCE MANUAL
Rev. 03-18
COMBINATION OF KEYS
+
LEVEL 1 PROGRAMMING
Pressing both keys together for more than 3 seconds
enables access to the Level 1 programming menu.
EXIT PROGRAMMING
Pressing both keys together for more than 3 seconds in
any programming menu exits the menu concerned.
+ +
LEVEL 2 PROGRAMMING
Pressing all keys together for more than 3 seconds
enables access to the Level 2 programming menu.
To exit the menu, press the up and down arrow keys
together.
+
LEVEL 3 PROGRAMMING
Pressing both keys together for more than 3 seconds
enables access to the Level 3 programming menu.
To exit the menu, press the up and down arrow keys
together.
pressed
+
SWITCHING FROM Bar to °C WHILE
VIEWING THE VALUE OF THE FOLLOWING
VARIABLES IN Bar, if Pt=0.
The variables involved with this kind of view are:
SET POINT, r0, LSE, HSE, A1, A2, iOv, nSC.
When displaying the value contained in one of the variables
listed above, pressing the stand-by key switches the view from
Bar to °C according to the table of the gas type selected until
the keys are released.
5.4

DIN NANO FSC Chapter 5 –Data Programming
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 12
VIEWING AND CONFIGURATION OF SET POINT
The SETPOINT is set in Bar if the adjustment is made by a pressure sensor (if Pt = 0). In the case in which
the adjustment is made by means of temperature sensor (NTC) SETPOINT is expressed in ° C (if Pt = 1).
The procedure for changing the SET is the following:
1. Press the SET key to view the current Bar/°C SET POINT value.
2. Pressing and holding the SET key and pressing one of the keys () or () alters the value of the Bar/°C
SETPOINT.
Release the SET key to return to the value of the adjustment sensor. Any changes made are saved
automatically.
While viewing the SET POINT value in Bar (then with Pt=0 and SET button pressed), if you press the
standby key at the same time, you will view the value changed to °C depending on the type of Gas set.
While viewing the value in °C, it will not be possible to change the set through the arrows.
LEVEL 1 PROGRAMMING (User level)
To access Level 1 programming, press and hold the UP key () and DOWN key () for over 3 seconds.
When the first programming variable appears:
1. Select the variable you want to change with the key () or with the key (). After selecting the required
variable, it is possible to:
2. View its configuration by pressing the SET key.
3. Edit configuration by pressing and holding the SET key and pressing either the () or () key.
4. After setting the configuration values, press and hold both the () key and the () key for a few seconds
until the cell temperature value appears and exit the menu. The system closes the menu when the keypad is
not used for over 30 seconds.
5. Any changes made to the variables are saved automatically when the system closes the configuration
menu.
LIST OF LEVEL 1 VARIABLES (User Level)
LABEL
MEANING
VALUES
DEFAULT
default
Pt
r0
SET differential
Value always greater than (iOv) value
with Pt=0
(regulation with pressure probe)
0,6 5,0 Bar
(with Pt=0)
2,0 Bar
*
with Pt=1 or
(Pt=0 and mOd=1)
(regulation with temperature
probe)
1,0 50,0 °C
with Pt=1 or
(Pt=0 and
mOd=1)
15,0 °C
t1
The minimum time that must elapse
between two successive insertions of
the fans. (SECONDS)
0 500
step 2 sec
10
t2
The minimum time that must elapse
between one shutdown and the next
insertion of the fans. (SECONDS)
0 500
step 2 sec
0
5.6
5.7
5.5

Chapter. 6 –Options DIN NANO FSC
Page 13
USER AND MAINTENANCE MANUAL
Rev. 03-18
Fty
Type of refrigerant GAS in use.
The setting of this parameter is essential
for correct operation.
0 = R404
1 = R134
2 = R22
3 = R407A
4 = R407F
5 = R407H
6 = R410A
7 = R450A
8 = R507
9 = R513A
10=R744(CO2)
11 = R449A
12 = R290
13 = R32
14 = R448A
15 = R452A
16 = R600
17 = R600A
18 = R1270
19 = R1234ze
20 = R23
21=R717(NH3)
0
UM
View unit of measurement
If Pt = 0 it is possible to choose the unit of
measurement. if Pt = 1 the control
temperature is always displayed in ° C.
0 = bar
1 = °C
0
AO1
Display of the 0-10V analogue output
for condenser fans
0,0 –10,0V
read-only
tA
Display ambient temperature
(if mOd = 1 or 2)
-45.0 –99.0 °C
if mOd=1 or 2
read-only
ALL
View of the last alarm triggered
Alarm code
read-only
A1
Minimum pressure/temperature alarm
The absolute pressure/temperature
referring to the regulation probe below
which, once the Ald delay time is
activated, the LOW pressure alarm is
triggered showing EL alternating with the
pressure/temperature on the display and
the flashing of the alarm icon.
When the alarm turns off, the "alarm
presence" icon will remain lit to indicate
which operation has occurred until the UP
button is pressed
with Pt=0
-0,6 ÷ (A2-0,2) Bar
step 0,2 Bar
-0,6 Bar
*
with Pt=1 or
(Pt=0 and mOd=1)
-45,0 ÷ (A2-0,2) °C
step 0,2 °C
-45,0 °C
A2
Maximum pressure/temperature alarm
The absolute pressure/temperature
referring to the regulation probe above
which, once the Ald delay time is
activated, the HIGH pressure/temperature
alarm is triggered showing EH alternating
with the pressure on the display and the
flashing of the alarm icon.
When the alarm turns off, the "alarm
presence" icon will remain lit to indicate
which operation has occurred until the UP
button is pressed
with Pt=0
(A1+0,2) ÷ +90,0 Bar
step 0,2 Bar
+30,0 Bar
*
with Pt=1 or
(Pt=0 and mOd=1)
(A1+0,2) ÷ +99,0 °C
step 0,2 °C
99,0 °C
tdS
Day start time
00,0 ÷ 23,5
6,0
tdE
Day end time
00,0 ÷ 23,5
22,0

DIN NANO FSC Chapter 5 –Data Programming
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 14
LEVEL 2 PROGRAMMING (Installer level)
To access Level 2 programming, press and hold the UP key (), DOWN key () and STAND-BY key for
over 3 seconds.
When the first programming variable appears:
1. Select the variable you want to change with the key () or with the key (). After selecting the required
variable, it is possible to:
2. View its configuration by pressing the SET key.
3. Edit configuration by pressing and holding the SET key and pressing either the () or () key.
4. After setting the configuration values, press and hold both the () key and the () key for a few seconds
until the cell temperature value appears and exit the menu.
5. Any changes made to the variables are saved automatically when the system closes the configuration
menu.
LIST OF LEVEL 2 VARIABLES (Installer Level)
LABEL
MEANING
VALUES
DEFAULT
default
Pt
In1
Settings of nr.1 Digital input
4 = High pressure (fans 100%) (with DI=1)
3 = Fans alarm (fans 0%) (with DI=1)
2 = Energy saving active (night) (with DI=1)
1 = Fans enabling (fans 0%) (with DI=1)
0 = Disabled
-1= Fans enabling (fans 0%) (with DI=0)
-2= Energy saving active (night) (with DI=0)
-3= Fans alarm (fans 0%) (with DI=0)
-4= High pressure (fans 100%) (with DI=0)
1
In2
Settings of nr.2 Digital input
4 = High pressure (fans 100%) (with DI=1)
3 = Fans alarm (fans 0%) (with DI=1)
2 = Energy saving active (night) (with DI=1)
1 = Fans enabling (fans 0%) (with DI=1)
0 = Disabled
-1= Fans enabling (fans 0%) (with DI=0)
-2= Energy saving active (night) (with DI=0)
-3= Fans alarm (fans 0%) (with DI=0)
-4= High pressure (fans 100%) (with DI=0)
3
In3
Settings of nr.3 Digital input
4 = High pressure (fans 100%) (with DI=1)
3 = Fans alarm (fans 0%) (with DI=1)
2 = Energy saving active (night) (with DI=1)
1 = Fans enabling (fans 0%) (with DI=1)
0 = Disabled
-1= Fans enabling (fans 0%) (with DI=0)
-2= Energy saving active (night) (with DI=0)
-3= Fans alarm (fans 0%) (with DI=0)
-4= High pressure (fans 100%) (with DI=0)
Valid if EXTERNAL PROBE absent
(mOd = 0 or mOd = 3)
4
DO5
General alarm output settings
1 = DO5 relay enabled in presence of
alarm
0 = DO5 relay disabled
-1 = DO5 relay disabled in presence of
alarm
1
EP4
Pressure (bar) equal to 4mA.
Referring to the adjustment sensor.
with Pt=0 : -1,0…(EP2-0,1) Bar
(with Pt=0)
0,0 Bar
*
with Pt=1 : Not used
(with Pt=1)
- - -
EP2
Pressure (bar) equal to 20mA.
Referring to the adjustment sensor.
with Pt=0 : (EP4+0,1)…90,0 Bar
(with Pt=0)
30,0 Bar
*
with Pt=1 : Not used
(with Pt=1)
- - -
5.8
5.9

Chapter. 6 –Options DIN NANO FSC
Page 15
USER AND MAINTENANCE MANUAL
Rev. 03-18
iOv
Offset Inverter fans
Value always less than the (r0) value
0,5 … 2,5 bar if Pt=0
always < r0
0,5 Bar
*
0,9 … 10,0 °C if Pt=1 or (Pt=0 and mOd=1)
always < r0
0,9 °C
iLv
Inverter fans: minimum 0-10V output
value setting
0,0 … 10,0 V
3,0 V
iHv
Inverter fans: maximum 0-10V output
value setting
0,0 … 10,0 V
10,0 V
bOv
Boost fans: Time for which the 0-10V
output of the fans is pushed to 100%.
This is used to win the breakaway at
their start. (SECONDS)
0 240 sec
2 sec
LSE
Minimum value that can be attributed
to set point
with Pt=0
0…(HSE-0,2) Bar, step 0,2 Bar
(with Pt=0)
10,0 Bar
*
with Pt=1 or (Pt=0 and mOd=1)
-45,0…(HSE-0,2) °C, step 0,2 °C
(with Pt=1)
-45,0 °C
HSE
Maximum value that can be attributed
to set point
with Pt=0
(LSE+0,2)…90,0 Bar, step 0,2 Bar
(with Pt=0)
25,0 Bar
*
with Pt=1 or (Pt=0 and mOd=1)
(LSE+0,2)…99,0 °C, step 0,2 °C
(with Pt=1)
99,0 °C
Ald
Minimum or maximum
pressure/temperature alarm
signalling and display delay time.
0…240 min
120 min
CL1
Adjustment sensor calibration
-10,0…+10,0 Bar or °C
0,0
CL2
Ambient sensor calibration
-10,0…+10,0 °C
0,0 °C
tAM
Minimum ambient temperature
-45,0 … 99,0 °C
0,0 °C
dAt
Differential ambient temperature
1,0 … 99,0 °C
50,0 °C
iMv
If mOd = 2: Maximum value that can take
the minimum voltage 0-10 V in the case of
ambient temperature compensation
If mOd=3: 0-10V output fixed value
iLv … iHv
5,0 V
dnE
Night mode enable (energy saving)
At night operation decimal point
flashes.
(dnE forced to 0 if mOd=1)
0 = disabled
1 = enabled
0

DIN NANO FSC Chapter 5 –Data Programming
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 16
nSC
Correction for the compressor SET
during night operation (energy
saving)
During night operation the
Compressor set is:
Compressor Set = Set + NSC
-5,0 … 5,0 Bar
0,0 Bar
-20,0 … 20,0 °C
0,0 °C
Ad
Network address for connection to the
TeleNET or Modbus supervision
system
0 ÷ 31 (with SEr=0)
1 ÷ 247 (with SEr=1)
1
Ser
RS-485 communication protocol
0 = TeleNET protocol
1 = Modbus-RTU protocol
0
Bdr
Modbus baudrate.
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
5
Prt
Modbus parity checking.
0 = no parity bit
1 = even parity bit
2 = odd parity bit
0
P1
Password: type of protection
(Active when PA is not 0)
0 = shows only the set point and permits
deactivation of the alarms.
1 = disables access to level 1, 2 and 3
programming (access permitted to all other
functions).
2 = disables access to level 2 and 3
programming (access permitted to all other
functions).
3 = disables access to level 3 programming
(access permitted to all other functions).
3
PA
Password
(see P1 for the type of protection)
0...999
0 = function disabled
0
Yr
Set year
0 … 99
14
Mo
Set month
1 … 12
1
dy
Set day
1 … 31
1
Hr
Set hour
0 … 23
12
min
Set minutes
0 … 59
30
dEF
Reserved parameter
read-only
reL
Software release
read-only

Chapter. 6 –Options DIN NANO FSC
Page 17
USER AND MAINTENANCE MANUAL
Rev. 03-18
LEVEL 3 PROGRAMMING (Installer level)
To access Level 3 programming, press and hold the UP key () and STAND-BY key for over 3 seconds.
When the first programming variable appears:
1. Select the variable you want to change with the key () or with the key (). After selecting the required
variable, it is possible to:
2. View its configuration by pressing the SET key.
3. Edit configuration by pressing and holding the SET key and pressing either the () or () key.
4. After setting the configuration values, press and hold both the () key and the () key for a few seconds
until the cell temperature value appears and exit the menu.
5. Any changes made to the variables are saved automatically when the system closes the configuration
menu.
LIST OF LEVEL 3 VARIABLES (Installer Level)
LABEL
MEANING
VALUES
DEFAULT
default
Pt
Pt
Adjustment probe type:
PLEASE NOTE:
the Pt Exchange involves loading default
settings dedicated on the variables marked
with an asterisk in the "default Pt" column.
Modify the internal jumpers as described in
section “A.2 Connection diagram”,
consistent with the type of probe
connected.
0 = Pressure.
The control probe is a 4-20
mA pressure sensor
connected to terminals 23-
24 (see connection
diagram)
1 = Temperature.
The control probe is a NTC
10K temperature sensor
connected to terminals 23-
24 (see connection
diagram)
0
mOd
Operating mode
If mOd = 1 or mOd = 2 you need to
connect an external temperature sensor
(term. 21-22)
0 = normal mode
1 = energy saving
2 = low noise
3 = Fixed speed (0-10V
output equal to iMv)
0
SP1
Speed of reaction to changes of regulating
probe (terminals 23-24)
0 = fast
1 = normal
2 = slow
3 = very slow
1
SP2
Speed of reaction to changes of External
ambient probe (terminals 21-22)
0 = fast
1 = normal
2 = slow
3 = very slow
1
5.10
5.11

DIN NANO FSC Chapter 5 –Data Programming
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 18
OPERATING MODE
The condenser fans are controlled via a 0-10V analogue output and sideband-type adjustment.
The LED icon (11) turns on to identify the fan condenser control.
The regulation probe (terminal 23 /24) can be of two types:
- Flow pressure probe 4-20mA (parameter Pt = 0).
- Condensing temperature probe NTC 10KΩ(parameter Pt = 1).
The setting of parameter Pt according to the type of probe connected must be combined with the correct
setting of the jumpers on the NDINFSC board (see connection diagram). Changing the Pt involves loading
the relevant default parameters on the variables marked with an asterisk in the “default Pt” column and
changing the unit of measure of some parameters (Bar if the probe connected is a pressure probe, °C if the
probe connected is a temperature probe). There are various fan control modes available.
CONTROL IN THE EVENT OF ALARMS
With the presence of ‘fans alarm’, the analog output is immediately brought to 0V and then open the digital
output 1 (inverter off). In addition, the display shows alarm (Ev).
NORMAL MODE (mOd = 0)
The adjustment follows the operation of graph nr.1 with the increase of the output pressure/condensing
temperature and the decrease of graph nr.2. For simplicity, we define the value of the probe pressure /
temperature as adjustment probe.
Adjustment probe value INCREASE (Graph nr.1):
The analogue output of the adjuster will be
0V for output pressure probe less or equal to
point (B) representing the "SET point + iOv
offset" value.
If the adjustment probe value is higher than
point (B), you will have the analogue output
at (iHv) for the maximum BOv time. BOv is
the Fans Boost times for which the adjuster
output is increased by 100% in order to help
the start-up of the fans.
Between points (B) and (C), the analogue
output will have a value proportional to the
value of the adjustment probe starting from
the minimum value of the parameter (iLv) up
to the maximum value of the parameter (iHv).
With adjustment probe value equal or higher
than point (C), you will have a (iHv) analogue
output.
Digital output nr.1 represents "the condenser
fans inverter activation" and is ON for
adjustment probe value higher than or equal
to the set point and OFF for lower values.
5.12
Graph. nr.1
5.12.1

Chapter. 6 –Options DIN NANO FSC
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USER AND MAINTENANCE MANUAL
Rev. 03-18
Adjustment probe value DECREASING (Graph nr.2):
With adjustment probe values equal or higher
than point (D), you will have a (iHv) analogue
output.
Between points (D) and (E), the analogue
output will have a value proportional to the
value of the adjustment probe starting from the
maximum value of (iHv) up to the minimum
value of the (iLv) parameter.
With values of the adjustment probe lower
than point (E) and higher than point (F), you
will have an analogue output equal to the
minimum value of the (iLv) parameter.
The analogue output of the adjuster will be 0V
for adjustment probe less or equal to point (F)
representing the "SET point" value.
Digital output nr.1 represents "the condenser
fans inverter activation" and is ON for
adjustment probe value higher than or equal to
the set point and OFF for lower values.
ENERGY SAVING MODE (mOd = 1)
In this mode the control modifies the Set-point according to the external temperature. When the external
temperature drops, so does the set-point. This ensures that a fixed differential is maintained between the
condensing temperature and the external temperature, therefore if the external temperature drops, so does
the reference for the condensing temperature and as a result the compressor efficiency improves.
In this mode the set-point is therefore set automatically and the parameters (LSE) and (HSE) set become the
adjustment limits. In this configuration the type of gas used must be set, in order to adjust the fans properly.
In the “Energy saving” mode it is recommended to use a temperature probe as an adjustment probe, in
order to facilitate the correct configuration of the parameters and anticipate the external temperature
variations more effectively.
Graph. nr.2
5.12.2

DIN NANO FSC Chapter 5 –Data Programming
USER AND MAINTENANCE MANUAL
Rev. 03-18
Page 20
LOW NOISE MODE (mOd = 2)
By connecting a room temperature probe it is possible to anticipate and counteract the effects of the
variation of the external climatic conditions on the setting (system pressure / condensing temperature). This
function can be particularly useful because, if configured appropriately, it can reduce the speed of the
condenser fans (and therefore their noise and their consumption) if the external temperature drops, such as
at night or during the winter season.
Operation
The minimum speed of the fans increases as the external temperature by combining a variation of the
external temperature equal to dAt with a variation of the minimum control voltage equal to (iMV - iLV).
To take advantage of the external temperature compensation it is therefore advisable to set the parameter
(tAm) at the minimum external temperature estimated throughout the course of the year and the parameter
(dAt) at the maximum temperature excursion. The compensation algorithm varies the fan speed so that the
temperature (tAm) is associated with the minimum speed iLv, while the temperature (tAm + dAt) is
associated with the maximum speed iMv.
The minimum fan speed at a certain external temperature is calculated as:
5.12.3
tA (External ambient temperature)
time
T (°C)
dAt
HSE
LSE
Setpoint of
condensing