Danfoss Chiller and reversable chiller User guide

User Guide

Chiller and reversable chiller

Reciprocating, scroll and screw compressors

Software Version 4.40.00

User Guide | Chiller and reversable chiller, reciprocating, scroll and screw compressors

Contents

User Interface...............................................................................	4	High water temperature alarm in cooling mode.....................	34
LED Display, LCD Display, Keyboard, Unit status, Login, Start,		Parameter: Ats, Atd
Parameter, Input/Output, I/O Display, I/O Config, I/O Prb		Boiler water temperature alarm...............................................	34
Calibration, I/O Commissioning, Alarm, EEV, VSH Monitor, VSH		Parameter: AbS, Abd
Control, Clock, Language, Service, Hours Counters, Variable		Fault of the regulation probe of the external coil...................	35
speed pump		Parameter: ACM, ACS, ACd
Parameters..................................................................................	12	Preventions.................................................................................	35
Display........................................................................................	12	Parameter: TMx, THo, TLo, HPE, HPo, HPh, LPE, LPo, LPh, PPt,
Parameter: dSA, dSb, dsc, Log, Par		PPp, HFo
Password.....................................................................................	13	Superheat alarms.......................................................................	37
Parameter: L01, L02, L03		Parameter: SHh, AHI, Ahi, AHd
SetUp...........................................................................................	13	Oil temperature alarms..............................................................	37
Parameter: y01, y02, y03, y04, y05, y06, y08, y09		Parameter: OTm, OTi, OTd
Serial setting...............................................................................	14	Screw compressors.....................................................................	38
Parameter: Cid, Ser, bAU, COM		Parameter: C01, C02, CSO, CSb, T1, T2,T3, T4, C07, C08, T5, T6,
Evaporator..................................................................................	15	T21, T22, T24, T24, T25, T26, T27, T28, T29
Parameter: H1, H2, H3, H4, H5, H12		Starting type of the compressor...............................................	42
Compressor.................................................................................	16	Parameter: Sty, Sti, SSt, Stm, Sdd
Parameter: H6, H7		Economizer.................................................................................	43
Condenser...................................................................................	17	Parameter: E01, EO2, EO3, EO4
Parameter: H9, H10, H11		Liquid injection..........................................................................	44
Heat Pump..................................................................................	18	Parameter: T41, T42, T43, T44, T45
Parameter: H40, H41, H42		Compressor with unloaders......................................................	44
Maintenance...............................................................................	19	Parameter: C04, C05, C06, C08
Parameter: H43		Maximum number of compressor starts per hour...................	45
Network settings........................................................................	20	Parameter: CT0, CT1, CT2, CT3, CT4, CT5, CT6, CT7
Parameter: n01,…n17		Valve in the liquid line...............................................................	46
Configuration.............................................................................	22	Parameter: Pd1, Pd2, Pd3, Pd4
Parameter: rEG, rET, rT1, rT2, o30, Er1		Maximum compressor running hours......................................	47
Main Setpoint.............................................................................	24	Parameter: C50
Parameter: SC1, SCL, SCH, SH1, SHL, SHH, SRE		Inverter compressor...................................................................	48
Economic Setpoint.....................................................................	25	Parameter: IV0, IV1, IV2, IV3, IV4, IV5
Parameter: SdS, SdM, SdC, SdH, SdO		Compressor enabling.................................................................	50
Setpoint compensation in based on the outside temperature.. 26		Parameter: CT1, CT2, CT3, CT4, CT5, CT6, CT7, CT8
Parameter: CC1, CC2, CC3, CC4, CH2, CH3, CH4		Heaters........................................................................................	50
PI regulation...............................................................................	27	Parameter: HE1, HE2, HE3, HE4, HE5, HE6, HE7
Parameter: CrC1, rH1, Rin, rC2, rC3		Pump of the internal coil...........................................................	51
Dead zone regulation................................................................	28	Parameter: P01, P02, P03, P04
Parameter: ddC, ddH, dd1, dd2, dd3, dd4, dd5, dd6, dd7, dd8...	28	Modulating Pump......................................................................	52
Digital output lock.....................................................................	29	Parameter: ERT, ECS, ECd, ECi, EHS, EHd, EHi, EDB, EI1, EI2, EI3
Parameter: DOn, Ain, Dos, DOd		Fan for the internal coil..............................................................	53
Buzzer and relay.........................................................................	29	Parameter: P21, P22, P50
Parameter: BUZ, Adl, AOF		Free cooling................................................................................	54
Flow alarm..................................................................................	30	Parameter: FrA, Fr1, Fr2, Fr3, Fr4, Fr5, Fr6, Fr7, Fr8, Fr9, FI1,
Parameter: AFr, AF1, AF2, AF3		FI2, FI3
ICE alarm.....................................................................................	31	Valve in the water line................................................................	56
Parameter: AIS, AID, Air, AI1, AI2, AI3, AIT, AIo		Parameter: EF1, EF2
Compressor oil delta pressure alarm........................................	32	External coil................................................................................	56
Parameter: OPR, OdP, GdP		Parameter: F01
Circuit high temperature alarm................................................	32	Fan requests................................................................................	57
Parameter: HTs, HTd		Parameter: F02, F03, FC, FCD, FCI, FCd, FHS, FHD, FHI, FHd
Pressure alarms from analogue input......................................	33	Fan regulation with a variable proportional part...................	59
Parameter: AHE, AHS, AHd, Alr, AL1, AL2, ALE, ALS, ALd, LPt,		Parameter: F31, F32, F33, F34, F35, F36, F37, F24, F25
AVO, VCt, SHS, SHb

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Economic setpoint for fan regulation.......................................	60
Parameter: SS1, SS2, SS3, SS4
Stepless regulation of the fan...................................................	60
Parameter: F10, F11, F12, F13, F14, F20, F21, F22, F23
Hot gas bypass valve..................................................................	61
Parameter: Bp0, Bp1
Cooling towers............................................................................	62
Parameter: WFs, WFd
Reversing cycle valve (4 ways valve).........................................	63
Parameter: rE2, rE1, rE3, rE4
Defrost........................................................................................	64
Parameter: d01, d02, d03, d04, d05, d06, d07, d09, d10, d11,
d12, d13, d14, d15, d16, d20, d22, d23, d25, d26
Heat recovery.............................................................................	66
Parameter: HRs, HRm, HRc, HRn, HRt, HRo
Superheat...................................................................................	67
Parameter: V10, V20, bAt, ex1, ex2, ex3, N19, N04, N05, N20,
N22, N10, N09, N11, N32, N18, N17, N15, N21, SHO
Input output expansion module...............................................	69
Parameter: XCn
Auxiliary alarms.........................................................................	69
Parameter: a11, a21, a31, a41, a12, a22, a32, a42, a13, a23,
a33, a43, a 14, a24, a34, a44
Oil Alarm Tandem ......................................................................	70
Parameter: BME, BST, TD1, TD2, TD3, TD4, ADO, BOF, BFR
Compressor Oil Pump................................................................	72
Parameter: OPE, OPO, OT1, OT2
Temperature delta of the oil......................................................	73
Parameter: OTD, OD1, OD2
How to set the power request remotely ..................................	73
Parameter: RPE, RPS
How to log data on an SD card .................................................	74
Parameter: ENL
Commissioning...........................................................................	77
Parameter: Ort
Graphic diagrams of some of the managed unit types...........	80
Status variables..........................................................................	91
Software status...........................................................................	91
Parameter: A01, …, A19, C01, …, C04, E01, …, E08
Software info..............................................................................	92
Parameter: F01, …, F07
Superheat info............................................................................	93
Parameter: H01, …, H13

Preparatory: link to MCXShape manual

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User Interface

LED Display, LCD Display, Keyboard, Unit status, Login, Start, Parameter, Input/Output, I/O Display, I/O Config, I/O Prb Calibration, I/O Commissioning, Alarm, EEV, VSH Monitor, VSH Control, Clock, Language, Service, Hours Counters, Variable speed pump

Functionalities: Enable screen saver for LCD

Functionalities: Enable LED display

Enable support for MMILDS

Functionalities: Enable schema view

Functionalities: Enable I/O probe calibration

Functionalities: Enable override of input and output

Functionalities: Enable commissioning form

Functionalities: Enable EEV using EKE 1C

Enable MMI navigation

Functionalities: Enable EEV using EXD 316

Functionalities: Enable EEV using MCX driver

Functionalities: Enable VSH Modbus control

Functionalities: Enable Scheduler

Functionalities: Enable Evaporator variable capacity pump

Note: playing with MCXShape, it is very easy to customize the structure and the visibility of the menu: so the following indication cannot match with all the compiled software

Main screen: LED Display

Functionalities: Enable LED display

Note: check parameters dsA, dSb and dSC.

Main screen: LCD Display

Note: check parameters dsA, dSb and dSC.

Keyboard

: Scroll UP, increment a value

: 3s when in main screen: toggle ON/OFF : Scroll down, decrement a value

: 3s when in main screen: toggle Heat/Cool mode : exit and save,

: when in main screen: access the active alarm list : 3s when in Alarm screen: manual reset

The LEFT and RIGHT keys, if present, allow you to move the cursor to the desired option

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Menu: Unit Status

Functionalities: Enable schema view

Schema:

View EEV Cx (for valve which is driven by EXD or MCX):

The alarms bit pattern is:

Note: by pressing “OK” key you manually tune the position of the valve

View EEV Cx (for valve which is driven by EKE):

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Menu: Login	Parameters and Menu are organized into 4 access levels. Levels from 1 to 3 are linked to a password.
	Elements cannot be accessed when they are on a higher level than the entering level. The level of
	each parameter and menu is defined with MCXShape
	• Level 0 is accessible without password
	• Levels 1-3 are linked to a password (Check parameters L01, L02 and L03)
	• Level 4 is not linked to a password, it can be used to make menu or parameters never reachable.
	You can log in from the menu:
	if the password provided is not correct you remain on the login screen. Otherwise you get back to
	the main menu.

Menu: Start
	Network menu: used to switch all the machines on or off in the Master and Slave network
	Default param. menu: used to load the default value of the parameters which have been defined in
	the .mcxs file

Menu: Parameter	This menu contains all the parameters.
	The meanings of the parameters are explained in the last part of this manual

Menu: I/O Display	Display input and output values
	LED display
	Shows you (using the UP and DOWN keys) all the input and output values in sequence, showing the
	I/O code on display A (“AI” for analogue input; “AO” for analogue output; “dI” for digital input and “dO”
	for digital output) and its value on display B (analogue inputs that are not present or in alarm are
	shown with “----”).
	LCD display
	You have access to three screens showing all the input and output values; each screen shows a group
	of 8 I/O. Use UP and DOWN keys to scroll. The second and third screens are used with MCX15 and
	MCX20 only.
	The example below shows the first screen.

Menu: I/O Config	This menu is prepared for future use
	Note: it is under the 4th level of password

Menu: I/O Prb Calibration	Functionalities: Enable I/O probe calibration
	inside the “Reset All” menu, you can reset all the offsets to zero
	Note: the screens calibration are not translated

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Menu: I/O Commissioning	Functionalities: Enable override of input and output
	Functionalities: Enable commissioning form
	Note: the logic will not affect the override. The override is stopped for power off, "Reset all" command
	and timeout that is defined into the menu "Setup"

Menu: Alarm	Each alarm is described through an alarm description (for LCD display only), an alarm code and the
	time since its activated in the format hours:minutes:seconds (seconds for LCD display only).
	Note: You can also access alarm visualization by pressing the ESC key from the main screen.
	The alarm is only reset if the alarm has ended and it will send you back to the main screen.
	Note: Alarms can also be reset by holding ESC for 3 seconds on the alarm screens

Menu: EEV	Functionalities: Enable EEV using EKE 1C
	Functionalities: Enable EEV using EXD 316
	The parameters inside the external drivers can be checked and changed in the Config EEVx menu.
	The available parameters for the EXD are: r05, r09, r10, r12, A34, n04, n05, n06, n09, n10, n11, n15,
	n17, n18, n19, n20, n21, n22, n32, n37, n38, n39, n40, n42, n43, n44, n45, n50, o10, o18, o20, o21,
	o30, o45, o56, o61, n03
	The available parameters for the EKE are: R012, R009, r105, r107, O030, N102, N015, N104, N017,
	N021, N107, N009, N010, N116, N005, N019, N004, N020, N117, N119, N130, N011, N140, N141,
	A034, A103, A104, A110, A102, I020, I022, I040, I042, I043, O020, O021, I067, R005, B101, O002,
	O022, G003, N108, N109
	The Load Factory menu overwrite the EXD parameters with the default ones

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Menu: VSH Monitor

Functionalities: Enable VSH Modbus control

VSH Status:

VSH Alarms:

The STW bit-map is:

VSH inverter details:

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Menu: VSH Control

These commands are linked with the control word of the inverter

Menu: Clock

Functionalities: Enable Scheduler

Note: with the number beside to the function "Enable scheduler" you set the maximum amount of records, before to change it consider that it also affects the EEPROM.

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Menu: Language

Menu: Service

Software info: Check variables status F01-F07

Device info:

Show rolling text:

Enabling rolling text will add additional information in the main screen

-P: Power demand

-CxAlarm: Compressor X is in alarm

-CxCTy: Compressor X is waiting for the parameter with the label CTy

-P-Down: Compressor is waiting for pump down to be switched off

-CxPrev: Circuit X is being reducing by prevention

Network reset: it restarts from zero the managing of the master slave network

Stepper valves info:

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Menu: Hours Counters	Note: The Reset Counters menu resets to zero all the counters, compressors and both pumps.
	For resetting the single compressor or pump push "Enter" button into the screen where are reported
	the hours of the device.

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Parameters

Display

Parameter: dSA, dSb, dsc, Log, Par

How to customize the main screen.

dSA-Display A value	0= OFF : Display A is not used
	1= IdOF : Display A shows the state of the digital input ON/OFF
	2	=SEt : Display A shows the set point of the compressors regulation
	3	=rEg : Display A shows the probe used for regulation
	4=AI1 : Display A shows the value of the analogue input 1
	……
	19 =AI16 : Display A shows the value of the analogue input 16

dSb-Display B value	0	=OFF : Display B is not used
	1=IdOF : Display B shows the state of the digital input ON/OFF
	2=SEt : Display B shows the set point of the compressors regulation
	3	=rEg : Display B shows the probe used for regulation
	4	=AI1 : Display B shows the value of the analogue input 1
	…
	19 =AI16 : Display B shows the value of the analogue input 16
	20 =TcP1 : Display B shows the temperature calculated from the dP1 sensor
	…
	23 =TcP4 : Display B shows the temperature calculated from the dP4 sensor

dsc-Icone for cooling mode

Log- Logo	Log=0 is combined with the image StartLogoDX in Chiller/BIN/Graph folder
	Log=1 is combined with the image StartLogoDX_1 in Chiller/BIN/Graph folder
	Note: the logo is shown just after the power on, pay attention to the size of the image because it is fit
	in this screen

Par- Parameters version	It is not used in the software, can be used to recognize different set of parameters
	Note: this number is reported into the software information

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Password

Parameter: L01, L02, L03

How to change the passwords.

L01, L02, L03-	Typing the parameter L0X, in the login screen, you will be able to see all the parameters and menu
Level x password	with level <= of X;
	The level of access is highlighted in the yellow square;
	after 10 minutes of inactivity the display is set to an access level of zero

SetUp

Parameter: y01, y02, y03, y04, y05, y06, y08, y09

How to switch ON-OFF and change the application mode from parameters.

Functionalities: Enable scheduler

Functionalities: Enable show compressor status

Digital input: ONO

Digital output: UNT

y01- System ON/OFF	0=Machine OFF
	1=Machine status depends on the DI _ONO
	Defines whether the chiller is in the ON or OFF state, it can be changed from the menu, remotely by
	Modbus or CANBUS and from start screen by holding the up arrow key.
	Note1: The software is in ON status only if y02=ON and DI_ONO=ON
	Note2: The chiller status is also reported in the digital output UNT_Unit Status

y02- Restart mode after	0=OFF means that after power on, the chiller gets up in OFF state
power OFF	1=ON means that after power on, the chiller gets up in ON state
	2=EQUA means that after power on, the chiller keeps the same state as before power off

y03- System heat/cool	It works only with H40> 0 and rE2=UI;
	This defines whether the machine should be in chiller mode or heat pump mode.
	This parameter can also be changed from the “Start” menu

y04- Actuators delay from	It is in seconds and sets the delay when powered ON (not when the unit status changes to ON) before
power ON	activating any outputs. Its purpose is to distribute the drawn current and protect the elements and
	particularly the compressor against repeated starts in the event of frequent power failures. When the
	timer has elapsed, the controller starts to manage the outputs based on the other times and the other
	normal functions.

y05- Temperature	0=C means that the user interface will show values in Celsius and bar
measurement unit	1=F means that the user interface will show values in Fahrenheit and PSI

y06- Keyboard lock	0=No
	1=Yes means that the user interface is locked
	Note: This parameter can be adjusted in order to be set remotely because it is not enabled for the menu

y08- Scheduler enable	0=No means that the scheduler is disabled
	1=Yes means that the scheduler is enabled
	Note: the “Enable scheduler” functionality is required

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y09- Show rolling test	0=No
	1=Yes
	Provides information about what is going on in relation to the cutting in/out of the compressors

Note: If the functionalities “Enable show compressor status” is enabled in the UI, a small icon is added for each compressor

Serial setting

Parameter: Cid, Ser, bAU, COM

How to configure the communication port.

Functionalities: Enable Modbus address different from CANBUS address

Cid – Serial address (CAN)	Defines the ID in the CANBUS communication
	Note: the baud rate and the settings of the CANBUS communication is tuned through the bios menu
	or though the MYK

SEr – Serial address (MODBUS)	Defines the ID in the Modbus communication
	Note: the functionalities “Enable Modbus address different from CANBUS address” is required

bAU – Serial baud rate (Mod-	Defines the baud rate in the Modbus communication
bus)	0 means Reserved: do not use
	1 means 1200 bits/sec
	2 means 4200 bits/sec
	3 means 4800 bits/sec
	4 means 9600 bits/sec
	5 means 14400 bits/sec
	6 means 19200 bits/sec
	5 means 28800 bits/sec
	8 means 38400 bits/sec
	9 means 57600 bits/sec
	8 means 115200 bits/sec

COM – Serial settings	Defines the serial settings of the Modbus communication
(Modbus)	0 means 8N1
	1 means 8E2
	2 means 8N2

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Evaporator

Parameter: H1, H2, H3, H4, H5, H12

How to configure the internal coils.

Digital input: OPE, OPE1, OPE2

Digital output: PE1, PE2, …, PE8, H1, …, H4

Analogue input: TIN, TOM, TO1, …, TO4

Analogue output: E1, …, E4

Alarms: AE1, AO7, AP0, AP1, …, AP9

H1 – Number of evaporators	Defines the number of internal coils;
	The supply temperature (TIN) is the same for all the coils.
	Each coil has a “leaving temperature” (T01-T04) ; there is also a common “leaving temperature” sensor
	for all the coils ( TOM)

H2 – Number of circuits per	Defines the number of circuits for each internal coil;
evaporator	Configuration accepted:
	• 1 circuit per internal coil -> 0<H1<5
	• 2 circuits per internal coil ->0<H1<3
	• 3 circuits per internal coil H1=1
	• 4 circuits per internal coil H1=1

H3 – Air or water cooling	Defines whether the evaporation process is managed by a pump (H3=H2O) or a fan (H3=Air):
	• WATER evaporators (H3=H2O). For each evaporator, the H1,...,H4 digital outputs which are
	necessary to manage the antifreeze heaters on the basis of the leaving water temperature TO1,...,TO4
	are controlled. The number of heaters per evaporator is defined by H5.
	• AIR evaporators (H3=Air). Only the “TO1_Tout Evaporator 1” input is used to measure the supply air
	temperature even when more than one evaporator is present. The ice alarm AE1 is replaced with the
	Low air temperature warning A07 which is set to the same parameters as the ice alarm.

H4 – Number of pump/fan per	Defines the pumps (or fan) per evaporator:
evaporator	• WATER evaporators (H3=H2O): The PE1 and PE2 digital outputs are managed to control one pump
	or two twin pumps.
	• AIR evaporators (H3=Air): “PE1 and PE2” outputs are used to manage fans on the evaporator.
	Note: check "Fun for internal coil"

H5 – Number of heaters per	Defines the number of heaters for each internal coil;
evaporator	Configuration accepted:
	• 1 heater per internal coil -> 0<H1<5
	• 2 heaters per internal coil ->0<H1<3
	• 3 heaters per internal coil ->H1=1
	• 4 heaters per internal coil ->H1=1

H12 –Fan in common for each	0=NO means that each fan (AO ECx) works in relation to the evaporator pressure
evaporator	1=Yes means that only the fan EC1 will work in relation to worst pressure in the evaporators
	Note: the fan speed is managed with PI logic (check parameters ECS,….,Hi)

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Compressor

Parameter: H6, H7

How to configure the compressors number.

H6 – Number of compressor	Defines the number of compressor per circuit;
per circuit	It’s not possible have circuits with different number of compressors
	Configuration accepted:
	• 1 compressor per circuit -> 0<H1*H2<5
	• 2 compressors per circuit ->0<H1*H2<5
	• 3 compressors per circuit ->0<H1*H2<3
	• 4 compressors per circuit ->0<H1*H2<3
	• >4 compressors per circuit ->0<H1*H2<2

H7 – Number of unloader per	Defines the number of compressor partialisation;
compressor	The number of regulation steps is equal to H6H2H1*(H7+1)
	Activation and deactivation of the compressor’s unloader is defined by the parameters
	“C04-Unloaders activation mode” and “ C05-Unloaders deactivation mode”

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Condenser

Parameter: H9, H10, H11

How to configure the external coil.

Digital input: OFC, FCL1, …, FCL4, OFC1, …, OFC12

Digital output: FC1, …, FC12

Analogue output: Fc1, …, Fc4

Alarm: AF1, …, AF12

H9 – Air or water cooler	Defines whether the fans or the pump regulate condensing.
condenser	0=AIR : Controls defrosting in heating mode.
	1=H2O : The configuration managed is H10=1 and H11=Yes
	Note: the pump or fan behaviour is defined by parameters F01, F02 and F03

H10 – Number of pump/fans	Defines the necessary digital output to control the pumps or fans on the condenser.
per condenser	• Water-cooled units (H9=H2O).The single “Cond Fan1/Pump1” digital output is controlled to drive
	a pump.
	• Air-cooled units (H9=AIR). Contributes to defining the total number of managed ventilation steps and
	thus of the corresponding ”Condenser Fan1”, ..., ”Condenser Fan8”digital outputs used to drive them.

H11 –Fan in common to all	On multi-circuits units, fans can be in common to all condensers.
condenser	If fans are not in common to all condensers (H11=0=NO), the following output are controlled:
	• as many analogue inputs as the condensers (H1*H2)
	• as many digital outputs as the condensers (H1*H2), multiplied by the number of fans per condenser
	(H10); digital outputs for fans are assigned to condensers in a sequential and balanced way,
	assuming that all condensers have the same number of fans; e.g. in a system made of 2 condensers
	and 6 fans, “Cond Fan1/Pump1”, “Condenser Fan2” and “Condenser Fan3” outputs are assigned to
	control fans belonging to the first condenser; “Condenser Fan4”, “Condenser Fan5” and “Condenser
	Fan6” to the second condenser.
	• as many analogue output s “InverterFanCond1”,...,”InverterFanCond4” for condensing control as for
	the condensers (H1*H2).
	If fans are common to all condensers (H11=1=YES) the following outputs are used:
	• as before, as many analogue inputs for condensing controls as there are circuits per condenser
	(H1*H2), but the one requiring the higher response from the control is used for regulation. Each
	analogue input is then used for defrost control in heating mode;
	• as many digital outputs as fans per condenser (H10);
	• one analogue output “InverterFanCond1” for fan speed regulation.

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Heat Pump

Parameter: H40, H41, H42

How to configure the heat pump mode

Functionalities: Enable Heat Pump Control

Digital output: HC1, …, HC4, BO1, …, BO4

Analogue input: SP1, …, SP4, dP1, …, dP4

H40 –Heat pump type	0=No means that the software does not perform heating mode
	1=GAS means that the software performs the heating mode, the internal coil is the evaporator in
	cooling mode and the condenser in heating mode
	1=H2O means that the software performs the heating mode, the coils keep the same meaning in
	both heating and cooling mode both
	Note: one digital output “Reverse Valve C1”, ..., “Reverse Valve C4” per each circuit is reserved for
	controlling the reverse flow valve

H41- Boiler number of heaters	Boiler heaters “Boiler1”, ..., “Boiler4” are turned ON when the temperature measured by the regulation
	probe enters in the area defined by the active regulation setpoint in heating (SH1) and differential rH1.
	They are an alternative to the heat pump, not in addition.
	Boiler heaters can be activated only if the temperature measured by the “BoilerSafety” probe is
	under a specific safety limit AbS. If it is over the limit, alarm A14 is generated.
	To reset the alarm there is a constant differential Abd to be considered.

H42- Probe change in HP	0=No means that the probe is before the 4-way valve (close to the compressor):
	• the sensor SPx – Suction pressure Cx measures low pressure
	• the sensor dPx – Discharge pressure Cx measures high pressure
	1=Yes means that the probe is after the 4-way valve (close to the coils):
	• the sensor SPx – Suction pressure Cx measures low pressure in cooling mode and high pressure in
	heating mode
	• the sensor dPx – Discharge pressure Cx measures high pressure in cooling mode and low pressure
	in heating mode
	Note: if ex2=yes the variable used from H42 (pink line below) is always about low pressure, in
	this case pay attention to set H42=No because in heating mode the discharge pressure will not
	be available

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Maintenance

Parameter: H43

How to manually set the compressor power request.

Functionalities: Enable commissioning for power request

Digital output: MPR

H43- Manual chiller power	The power request provided to the compressors is about H43 %
	H43< zero means that the function is disabled
	Note: if H43 >=0 the digital output MPR is closed

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Network settings

Parameter: n01,…n17

The Master and Slave is a functionality that allow a group of machines to be managed like one machine (Master) decides which and how many units (Slaves) should run.

The max number of units is 8 (7 slaves + 1 master), the network is CANBUS. The Master and Slave function optimizes:

-ageing of machines

-distribution of the load in order to improve the performance of the plant

-The backup units

Functionalities: Enable Master/Slave

Alarms: N01, N02, N03, N04, N05,N06, N07, N08

n01 –MCX network disable	0=NO means that the Master slave function is enabled
	1=Yes means that the Master slave function is disabled

n02 –Number of slave nodes	It has to be set equal to (“number of chillers in the network” -1)

n03- Auto master select	0=NO means that the master in the master slave network can be only the chiller with the CANBUS ID
	equal to n15: if the master is not more available in the network, the other chillers will start to work in
	standalone mode
	1=Yes means that the master in the master slave network is the chiller with lowest CANBUS ID

n04- Distribution algo	0= PWR The master, using its own sensors, decides how many chillers are working and the chillers’
	power supply;
	The maximum number of units that can work is related to the gap between setpoint and
	temperature: practically the regulation band is divided for the number of machines (n02+1-n09):
	1= CAP the master manages only the start order (following the ageing of the machines), chillers
	manage their power as standalone machines.
	If all the units which are running have capacity above n12 %, the master will switch on another chiller (the
	youngest one).
	If all the units which are running have capacity below n13 %, the master will switch off the oldest chiller
	running
	The minimum time between two actions of the master is n14 seconds

n05- Power Smart power	1=Yes means that the master is allowed to cut-in the first chiller available without considering the
distribution enable	start order related to the ageing of the machines

n06- Node rotation enable	0=No means that the start sequence of the machines is fixed; the order depends on the addressing,
	the first to start is the machine with the smallest CANBUS ID, the first to stop is the chiller with the
	highest CANBUS ID
	1=Yes means that the start/stop sequence of the machines depends on the ageing of the chillers,
	always starting with the youngest of the set and the oldest one is always the first to stop. In the case
	that one machine works n17 hours more than another chiller that is switched off, the master will
	exchange the unit in order to align the ageing.

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n07- Backup node offset	When the gap between setpoint and temperature is above (n07+regulation band), the first backup
	unit is allowed to work as a support, also considering parameter n08 .
	Note: the offset to enable the other backup units is (n07*m+ regulation band):
	• m = 2 for the second backup unit
	• m = 3 for the third backup unit
	•	…
	Note: the backup units will work running normally after the set point. It will be switched off when the
	gap between setpoint and temperature is below the regulation band
	Note: the pump behaviour is defined through the parameter P01

n08- Time to enable n07	It’s the time to stay far away from the setpoint in order to cut in the backup unit
	Note: check parameter n07

n09-Number of back-up unit	n09 defines the number of backup units inside the master slave network
	A backup unit is never enabled (so does not provide cooling capacity) unless one of the following
	situations occurs:
	• one of the other units becomes unavailable
	• Support (see parameter n07 and n08)
	Note: The master chooses the backup unit (among all nodes present in the network) by looking at
	the working time of every unit: the one which has worked the longest will be the backup unit.

n10 – Evaporator in common	0=No each chiller consider its own evaporator flow alarm
	1=yes the master will read its “FPE” digital input (Flow Evaporator) and will send the information to
	other slaves

n11 – Pump alarm in common	0=No each chiller considers its own pump alarm
	1=yes the master will read its “AP1” digital input (Evap pump/fan overload alarm) and will send the
	information to other slaves

n12 – Capacity upper	See parameter n04
threshold

n13 – Capacity lower	See parameter n04
threshold

n14 – Capacity step min time	See parameter n04

n15 – Master node CAN ID	It has to be set equal to the lowest ID in the CANBUS network

n16 – Slaves node CAN ID offset	The slaves have to take the CAN ID in relation to the n15 just adding n16.
	E.G. for n02 =3
	•	Master ID= n15
	•	Slave1 ID= n15+n16
	•	Slave2 ID= n15+n16+n16
	•	Slave3 ID= n15+n16+n16+n16

n17 – Maximum gap time for	It is in hours
unit rotation	If a running unit becomes older than a switched-off unit by more than n17 hours, the logic will
	switch off the oldest unit running it will cause the other unit to be switched on.

n18 – Backup unit pump	0=OFF: the backup chillers in standby have the pump switched-off
status	1=ON: the backup chillers in standby have the pump switched-on
	Note:during support or backup, the pump of the chiller follow P01 setting

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User Guide | Chiller and reversable chiller, reciprocating, scroll and screw compressors

Configuration

Parameter: rEG, rET, rT1, rT2, o30, Er1

rEG – Analogue input for	0= Tin : reference sensor is Tin_Tin Evaporator
temperature regulation	1= ToM: reference sensor is TOM_Tout Evap Mix
	2 =AI1: reference sensor is the analogue input 1
	……
	17 =AI16 : reference sensor is the analogue input 16
	18 =SPT1: reference is the temperature calculated from the sensor SP1_Suction Press C1, the gas
	type is set using parameter o31

rET – Regulation Type	Defines the relation between the temperature gap and the power request to the circuits.
	0=P : Power request to the circuits increases in proportional way with the regulation error, i.e., it is
	100% when the regulation error (the gap between setpoint and the reference sensor ) is equal to rC1
	( rH1)

1=PI: the power request is the sum of P regulation (rET=0) plus a component (Integral part) that increases in relation to the regulation error; the speed of the integral part depends on the parameter rin_Ti.

For PI regulation, the balance is reached only when the regulation sensor gets the setpoint.

2=dZ : The delay between compressors activations varies between a maximum value dd5 and minimum value dd6 proportional to the temperature position inside the regulation band defined by the activation differential dd1.

Above setpoint + dead zone + activation differential, the delay among activations is equal to the minimum.

Similarly the action for the delay among compressors deactivations, which can vary between a maximum value dd7 and a minimum value dd8, is proportional to the temperature position inside the regulation band defined by the deactivation differential dd2.

Below a setpoint differential, the delay among activations is equal to the minimum value, dd8, up to a limit threshold, dd3. Below that, all the compressors are immediately switched OFF to avoid the unit ice alarm.

rT1- Minimum limit for	The analogue output rtr linearly replays the regulation probe (check parameter rET)
TReg TX	It gets to 0% when the regulation probe reaches a value of rT1
	Note: if the regulation probe is in error the AO_rtr gets to 100%

rT2- Maximum limit for	The analogue output rtr linearly replays the regulation probe (check parameter rET)
TReg TX	It gets to 100% when the regulation probe reachs rT2 value
	Note: if regulation probe is in error the the AO_rtr gets to 100%

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o30 – Gas type	0=---
	1=R12
	2=R22
	3=R134a
	4=R502
	5=R717
	6=R13
	7=R131b1
	8=R23
	9=R500
	10=R503
	11=R114
	12=R142b
	13=--
	14=R32
	15=R227
	16=R401a
	17=R507
	18=R402a
	19=R404a
	20= R407c
	21= R407a
	22= R407b
	23= R410a
	24= R170
	25= R290
	26=R600
	27= R600a
	28= R744
	29= R1270
	30=R417a
	31=R422a
	32=R413A
	33=R422D
	34=R427A
	35=R438A
	36=R513A
	37=R407F
	38=R1234ze
	39=R1234yf
	40=R448A
	41=R449A
	42=R452A
	43=R450A
	44=R452B
	45=R454B
	46=R1233zdE
	47=R1234zeZ
	48=R449B
	49=R407H
	Note: the gas definition is used when the translation of the pressure in temperature is required;
	ReG=SPT1 and for the “internal” super heat control

o31 – Dew/Bubble Conversion	0=Dew
mode	1=Bubble used for the gas that require the "Glide" approximation

Er1 – Emergency mode	Er1 = -1 the function is disabled
max power	Er1 >= 0 when the digital input EEr is closed the power request is limited to Er1 instead of 100%
	Note: the functionality “Enable emergency mode from DI” is required

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User Guide | Chiller and reversable chiller, reciprocating, scroll and screw compressors

Main Setpoint

Parameter: SC1, SCL, SCH, SH1, SHL, SHH, SRE

Analogue input: TRM

SC1 – Cooling temperature set	Defines the setpoint in cooling mode
point

SCL – Minimum limit	Defines the minimum limit of the setpoint in cooling mode
	Note: This limit is not respected when adjusted through Modbus

SCH – Maximum limit	Defines the maximum limit of the setpoint in cooling mode
	Note: This limit is not respected when adjusted through Modbus

SH1 – heating temperature set	Defines the setpoint in heating mode
point

SHL – Minimum limit	Defines the minimum limit of the setpoint in heating mode
	Note: This limit is not respected when adjusted through Modbus

SHH – Maximum limit	Defines the maximum limit of the setpoint in heating mode
	Note: This limit is not respected when adjusted through Modbus

SRE- Remote set enable	The regulation setpoint is defined through the analogue input TRM_Remote Set
	0=NO means that the function is not enabled
	1=rEL means that
	set point = main setpoint + offset from analogue input (TRM_Remote set)

2=Abs means that set point is linearly defined through AI_TREM, between SCL - SCH in cooling and SHL - SHH in heating

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Economic Setpoint

Parameter: SdS, SdM, SdC, SdH, SdO

SdS- Setpoint selection	0=DI means that the digital input SET2_Reg offset from DI defines if use comfort setpoint (SC1 or
	SH1) or the economic setpoint (SC1+SdC or SH1-SdH); in economic mode the proportional band in
	the PI control is increased by SdO
	1=PAR meaning that the parameter SdM_Setpoint mode defines whether comfort setpoint
	(SC1 or SH1) or the economic setpoint (SC1+SdC or SH1-SdH) is to be used; in economic mode the
	proportional band in the PI control is increased by SdO

SdM- Setpoint mode	It works only for SdS=PAR
	0=COMF meaning that chiller uses comfort setpoint ( SC1 or SH1)
	1=ECO meaning that the chiller uses economic setpoint (SC1+SdC or SH1-SdH)
	In economic mode the proportional band in the PI control is increased of SdO.

SdC-Offset for setpoint in cool-	In economic status and cooling mode the regulation setpoint is shifted to SdC.
ing	Note: see parameter SdS

SdH-Offset for setpoint	In economic status and heating mode the regulation setpoint is shifted to SdH.
in heating	Note: Take a look to parameter SdS

SdO-Offset for differential	In economic mode the proportional band of regulation becomes rC1+SdO or rH1+SdO.
	Note: look at parameter SdS

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Setpoint compensation in based on the outside temperature

Parameter: CC1, CC2, CC3, CC4, CH2, CH3, CH4

Analogue input: OUt

CC1-Compensation enable	0=NO means compensation disable
	1=YES means compensation enable
	Note: this function adapts the setpoint to the outside temperature “Tout”

CC2-Outside temperature to	It’s in °C
start cool comp.

CC3-Outside temperature to	It’s in °C
stop cool comp.

CC4-Maximum cooling	It’s in °C
compensation

CH2-Outside temperature to	It’s in °C
start heat comp.	Like CC2 but used in heating mode

CH3-Outside temperature to	It’s in °C
stop heat comp.	Like CC3 but used in heating mode

CH4-Maximum heating	It’s in °C
compensation.	Like CC4 but used in heating mode

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PI regulation

Parameter: CrC1, rH1, Rin, rC2, rC3

Note: the PI regulation is enabled when the parameter rET is equal to P or PI

rC1-Cooling temperature	See parameter rET
differential.

rH1-Heating temperature	See parameter rET
differential.

Rin- Ti	It is the integral time of the PI regulation, the bigger the value of Rin the slower the action of the
	Integral part.
	See parameter rET

rC2-Cut Off enable	It enables the gradual reduction of the integral error once reached and exceeded the setpoint. The
	error integral in fact tends to keep the compressors turned on even if the proportional part of the
	error would require a shutdown. The amount of reduction is proportional to the distance from the
	setpoint considering the rC3 band. For example, in cooling, the reduction is zero when the control
	temperature is equal to the setpoint; the reduction is greatest when it is equal to setpoint-rC3.

rC3- Cut off offset

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Dead zone regulation

Parameter: ddC, ddH, dd1, dd2, dd3, dd4, dd5, dd6, dd7, dd8

Functionalities: Enable Dead Zone Regulation

The dead zone regulation is enable when the parameter rET is equal to DZ It is a variable time regulation mainly used when the regulated value is the temperature of the fluid leaving the evaporator.

In the dead zone ddC no regulating action is taken.

Close to the dead zone the decision to cut the compressor in or out will take a maximum time of (dd5 or dd7), a time that will decrease linearly outside the dead zone. This variable time logic is described below.

ddC-Cooling dead zone	In dead zone ddC no regulation action is taken.
	This is above the setpoint and used in cooling mode

ddH-Heating dead zone	In dead zone ddH no regulation action is taken.
	This is below the setpoint used in heating mode

dd1-Comp activation	Defines the maximum temperature gap to have a minimum delay (dd6) in the compressor’s activation
differential	Note: see picture in the parameter ddC and ddH

dd2-Comp deactivation	Defines the maximum temperature gap to have a minimum delay (dd6) in the compressor’s
differential	deactivation
	Note: see picture in the parameter ddC and ddH

dd3-Min temp for OFF comp	Defines the minimum temperature below which the compressors are switched off
in cooling	Note: see picture in the parameter ddC

dd4-Max temp for OFF comp	Defines the maximum temperature above which the compressors are switched off
in heating	Note: see picture in the parameter ddH

dd5-Max delay of comp activa-	Defines the maximum delay before a compressor cuts in
tion	Note: see picture in the parameter ddC and ddH

dd6-Min delay of comp	Defines the minimum delay before a compressor cuts in
activation	Note: see picture in the parameter ddC and ddH

dd7-Max delay of comp	Defines the maximum delay before a compressor cuts off
deactivation	Note: see picture in the parameter ddC and ddH

dd8-Min delay of comp	Defines the minimum delay before a compressor cuts off
deactivation	Note: see picture in the parameter ddC and ddH

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Digital output lock

Parameter: DOn, Ain, Dos, DOd

It is possible to lock a digital output in open position in relation to an analogue input.

The lock condition is reported in the rolling text

Functionalities: Enable DO Locking from AI

DOn-Digital output number	This is the number of the digital output to lock in open position;
	The conditions to lock it are defined by AIn, DOs and DOd

AIn-Analogue input number	This is the number of the analogue input to refer to lock the digital output DOn

DOs-Set point for locking	This is the setpoint to compare with the value of the analogue input AIn for locking the digital output
	DOn;
	Note: set parameter DOd to lock the digital output DOn above or below the setpoint DOs

DOd-Differential to unlock

Buzzer and relay

Parameter: BUZ, Adl, AOF

BUZ-Buzzer activation time	It's in minutes.
number	Defines the maximum time that the buzzer can work;
	BUZ=15 means that there is no limit in the active time of buzzer

Adl-Alarm relay activation	It's in seconds.
delay	Defines the delay of the alarm relay when there is an alarm

AOF-Alarm relay active if unit	Defines whether the alarm relay works in the OFF state of the chiller
in off

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