RDZ UMHPI User manual

Chiller and Heat Pumps
UMHPI Controller
USER MANUAL
UMHPI on-board electronic user controller
FAE0FA000BZ.00
06/2018
bit.ly/rdzwebsite

INDUSTRIAL INVERTER AIR/WATER HEAT PUMPS WITH
AXIAL FANS
CONTROLLER MANUAL
Models
UMHPI 25 / UMHPI V 25
UMHPI 35 / UMHPI V 35
UMHPI 50 / UMHPI V 50
UMHPI 60
This manual has been created for informative purpose. The company declines any responsibility for the results of any projecting or any installation based on the explanations and/or on
the technical specifications provided in this manual. It is besides forbidden the reproduction under any form of the texts and of the figures contained in this manual.
"This manual is a translation from the official italian language version. For reasons of environmental respect the Company will not provide the hard copy in the original language which
could be directly requested or downloaded from the Company website at any time. In case of any dispute, the original language manual will be the trusted one".
00 10-2017 Alignment with Ver324Rev015rc12
Rev Date Notes
Serie / Series / Serie / Serie / Série
UMHPI INDUSTRIAL INVERTER AIR/WATER HEAT PUMPS WITH AXIAL FANS
Possible wasted electrical or electronic devices/products should not be located together with normal domestic waste, but disposed according to the
current WEEE law in compliance with the European Directive 2012/19/UE and following modifications 2003/108/EC. Please inform yourself at your
local Administration or at your reseller in case the product will be replaced with a similar one.

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INDEX
1CONSERVATION OF THE MANUAL ...................................................................................................................................... 4
1.1 GRAPHIC SYMBOLS USED IN THE MANUAL ............................................................................................................................ 4
2PERMITTED USES................................................................................................................................................................ 4
3GENERAL SAFETY GUIDELINES ............................................................................................................................................ 4
3.1 PERSONAL PROTECTION EQUIPMENTS.................................................................................................................................. 4
3.2 HEALTH AND SAFETY OF WORKERS........................................................................................................................................ 5
4PURPOSES AND CONTENTS OF THE MANUAL...................................................................................................................... 5
5SYSTEM ARCHITECTURE ..................................................................................................................................................... 6
6USER – CB MASTER CONTROLLER INTERFACE...................................................................................................................... 7
6.1 MENU STRUCTURE DIAGRAM ................................................................................................................................................ 7
6.2 ANALOG INPUTS..................................................................................................................................................................... 8
6.3 PARAMETERS CATEGORIES .................................................................................................................................................... 8
6.4 ADJUSTABLE SETPOINT BY THE USER ..................................................................................................................................... 8
6.4.1 DISPLAY .......................................................................................................................................................................... 9
6.4.2 LED.................................................................................................................................................................................. 9
6.5 INPUT/OUTPUT (I/O) PORTS .................................................................................................................................................. 9
7OPERATION LOGIC ............................................................................................................................................................10
7.1 DYNAMIC SETPOINT ADJUSTMENT ...................................................................................................................................... 10
7.2 SETPOINT ADJUSTMENT FROM 0-10V INPUT....................................................................................................................... 11
7.3 CIRCOLATOR......................................................................................................................................................................... 11
7.3.1 OPERATION BY MEAN OF THE THERMOREGULATOR (Default).................................................................................... 12
7.3.2 OPERATION UNDER THERMOREGULATOR CALL WITH PERIODIC ACTIVATION ........................................................... 12
7.3.3 OPERATION WITH ACTIVE ELECTRIC HEATER ............................................................................................................... 12
7.3.4 CONTINUOUS OPERATION ........................................................................................................................................... 12
7.3.5 LINEAR ADJUSTMENT OF THE CIRCULATING PUMP–DOUBLE WATER ΔT.................................................................... 12
7.4 MULTICOMPRESSORS .......................................................................................................................................................... 13
7.4.1 LOGIC OF ACTIVATION.................................................................................................................................................. 13
7.4.2 LOGIC OF RELEASE........................................................................................................................................................ 13
7.4.3 CAPACITY CONTROL ..................................................................................................................................................... 13
7.4.4 EMERGENCY CONDITIONS............................................................................................................................................ 14
7.4.5 DHW LOGIC CONTROL.................................................................................................................................................. 14
7.4.6 DEFROST FUNCTION CONTROL .................................................................................................................................... 14
7.4.7 INVERTER COMPRESSOR CONTROL IN COOLING MODE .............................................................................................. 14
7.4.8 HEATING FUNCTION CONTROL .................................................................................................................................... 14
7.4.9 TRANSITORY OF STARTING........................................................................................................................................... 15
7.5 HEAT DISSIPATION FAN MOTOR CONTROL .......................................................................................................................... 15
7.5.1 FAN SPEED CONTROL ................................................................................................................................................... 15
7.5.2 FAN SPEED CONTROL IN COOLING MODE.................................................................................................................... 15
7.5.3 FAN SPEED CONTROL IN HEATING MODE .................................................................................................................... 16
7.6 MODULATION FOR OIL RETURN........................................................................................................................................... 16
7.7 DEFROSTING CYCLE.............................................................................................................................................................. 16
7.7.1 DEFROST OPERATION SIGNALIZATION ......................................................................................................................... 16
7.8 ALARM NOTIFICATION ......................................................................................................................................................... 17
7.9 SUMMER/WINTER OPERATION NOTIFICATION FUNCTION ................................................................................................. 17
7.10 COMPRESSOR CRANCKASE HEATER ..................................................................................................................................... 17
7.11 ANTIFREEZE PROTECTION ELECTRIC HEATERS (IF THE KA ACCESSORY IS PRESENT) ............................................................. 17
7.12 ACTIVATION OF DOMESTIC HOT WATER PRODUCTION ....................................................................................................... 17
7.12.1 MEMORY OF THE SENSOR IN HEATING MODE............................................................................................................. 18
7.13 HEATING MODE ON DOMESTIC HOT WATER TANK.............................................................................................................. 19
7.14 REMOTE FUNCTIONS............................................................................................................................................................ 20
7.14.1 ON/OFF......................................................................................................................................................................... 20
7.14.2 SUMMER/WINTER MODE COMMUTATION ................................................................................................................. 20
7.14.3 SANITARY MODE CALL FROM DIGITAL INPUT .............................................................................................................. 20
7.15 PLANT CIRCUIT REMOTE SENSOR......................................................................................................................................... 21
7.16 VAPOR INJECTION (ONLY FOR VVERSION)................................................................................................................................. 21
7.16.1 Main circuit VEE, Double control.................................................................................................................................. 22

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7.16.2 Injection electronic valve VEIV...................................................................................................................................... 22
7.16.3 Vapor injection valve (VEIV) ......................................................................................................................................... 23
8ACTIVABLE LOGIC FUNCTIONS WITH GI- MODULE FOR PLANT MANAGEMENT (OPTIONAL)................................................23
8.1 AUXILIARY ELECTRIC HEATERS ............................................................................................................................................. 23
8.1.1 AUXILIARY ELECTRIC HEATER THE PLANT SYSTEM ....................................................................................................... 23
8.1.2 AUXILIARY ELECTRIC HEATER OF THE PLANT IN DEFROST CYCLE................................................................................. 24
8.1.3 AUXILIARY ELECTRIC HEATER OF DHW PRODUCTION.................................................................................................. 24
8.1.4 SINGLE AUXILIARY HEATER FOR PLANT/DHW PRODUCTION ....................................................................................... 24
8.1.5 SELECTION MODE OF AUXILIARY ELECTRIC HEATERS................................................................................................... 24
8.1.6 MANAGEMENT OF THE CIRCULATOR WITH ACTIVE ELECTRIC HEATER ....................................................................... 24
8.2 BOILER ENABLEMENT........................................................................................................................................................... 24
8.3 ACTIVATION OF AUXILIARY ELECTRIC HEATER AND BOILER DURING THE JOINT/IN SUBSTITUTION OPERATION TO THE
COMPRESSOR................................................................................................................................................................................... 25
8.3.1 OPERATION IN HEAT PUMP MODE .............................................................................................................................. 25
8.3.2 IN JOINT OPERATION (AREA I)...................................................................................................................................... 25
8.3.3 IN JOINT OPERATION (AREA II)..................................................................................................................................... 26
8.3.4 IN SUBSTITUTION OPERATION ..................................................................................................................................... 26
8.3.5 OPERATION AREA - ACTIVATION OF THE AUXILIARY ELECTRIC HEATER AND BOILER (Plant circuit water temperature
sensor is not enabled) .................................................................................................................................................................. 26
8.3.6 AUXILIARY SYSTEMS OFFSET MANAGEMENT............................................................................................................... 29
8.4 DOUBLE SET-POINT .............................................................................................................................................................. 29
8.4.1 SETTINGS ...................................................................................................................................................................... 29
8.4.2 ADJUASTABLE SET-POINT ............................................................................................................................................. 30
8.4.3 COMMUTATIONS.......................................................................................................................................................... 30
8.5 MANAGEMENT OF THE SECONDARY CIRCULATOR (RELAUNCHING PUMP)............................................................................... 30
9ACTIVABLE FUNCTIONS WITH KIE MODULE (OPTIONAL) ....................................................................................................30
10 AVAILABLE FUNCTIONS WITH EVO TOUCH CONTROLLER (OPTIONAL).............................................................................31
11 TABLE OF ALLOWED PARAMETERS FOR THE USER AND INSTALLER.................................................................................31
11.1 SETPOINT CONFIGURATION PARAMETERS .......................................................................................................................... 31
11.2 CONFIGURATION PARAMETERS........................................................................................................................................... 31
11.3 ALARMS CONFIGURATION PARAMETERS ............................................................................................................................ 32
11.4 ADJUSTMENT PARAMETERS ................................................................................................................................................ 33
11.5 CONDENSTATION PARAMETERS .......................................................................................................................................... 33
11.6 PUMP CONFIGURATION PARAMETERS ................................................................................................................................ 34
11.7 DEFROSTING PARAMETERS.................................................................................................................................................. 34
11.8 VAPOR INJECTION PARAMETERS CONFIGURATION ............................................................................................................. 34
11.9 COMPRESSOR PARAMETERS CONFIGURATION ................................................................................................................... 34
11.10 CONFIGURATION PARAMETERS –MODULE “GI” ................................................................................................................... 35
11.11 CONFIGURATION PARAMETERS OF THE HEATING DEVICES –MOD GI.................................................................................. 35
(5) FOR THE MODEL UMHPI V R08=-20°C. ...................................................................................................................................36
11.12 CONFIGURATION PARAMETERS OF UMHPI V ...................................................................................................................... 36
12 ALARMS ........................................................................................................................................................................37
12.1 FLOW SWITCH [E06]............................................................................................................................................................. 37
12.2 ANTI-FREEZING [E05] ........................................................................................................................................................... 37
12.3 WATER SIDE HIGH TEMPERATURE [E18] .............................................................................................................................. 37
12.4 SENSORS ALARM [E61÷E69]................................................................................................................................................. 37
12.5 TIMEOUT INVERTER [E801] .................................................................................................................................................. 37
12.6 REMOTE ON/OFF [E00] ........................................................................................................................................................ 37
12.7 HIGH PRESSURE [E01]........................................................................................................................................................... 37
12.8 HIGH PRESSURE FLOW SWITCH (IN SERIES WITH THE COMPRESSOR OUTLET SENSOR) [E64] ............................................. 37
12.9 LOW PRESSURE [E02] ........................................................................................................................................................... 37
12.10 [E08] DRIVER LIMITATION .................................................................................................................................................... 37
12.11 [E101] MODBUS 1CONNECTION ERROR.............................................................................................................................. 37
12.12 POWER FAILURE................................................................................................................................................................... 38
12.13 USER BLOCK ALLARMS TABLE............................................................................................................................................... 38

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1CONSERVATION OF THE MANUAL
The manual has to be always kept for future reference. It has to be stored in a safe place, away from dusts and moisture. It has to
be also available and accessible to all users who shall consult it any time they are in doubt on how to operate the equipment.
The company reserves the right to modify its products and related manuals without necessarily updating previous versions of the
reference material. It declines also any responsibility for possible inaccuracies in the manual if due to printing or transcription
errors.
The customer shall store any updated copy of the manual or parts of it delivered by the manufacturer as an attachment to this
manual.
The company is available to give any detailed information about this manual and to give information regarding the use and the
maintenance of its own units.
1.1 GRAPHIC SYMBOLS USED IN THE MANUAL
Indicates prohibited operations.
Indicates operations that can be dangerous for people and/or disrupts the correct operation of the equipment.
Hazardous electrical voltage - risk of electric shock
Indicates important information that the operator has to follow in order to guarantee the correct operation of the
equipment in complete safety. It indicates also general notes.
2PERMITTED USES
•The company excludes any contractual and extra contractual liabilities for damages caused to persons, animals or objects, by
incorrect installation, setting and maintenance, improper use of the equipment, and the partial or superficial reading of the
information contained in this manual.
•These units have been designed only for heating and/or cooling water. Any other use not expressly authorized by the
manufacturer is considered improper and therefore not allowed.
•The execution of all works must be performed by skilled and qualified personnel and competent in the existing rules in the
country in which the appliance will be installed.
3GENERAL SAFETY GUIDELINES
Before beginning any operation on the units, every user and operator has to be perfectly knowledgeable about the operation of
the equipment and its control functions and has to have read and understood the information listed in this manual.
3.1 PERSONAL PROTECTION EQUIPMENTS
It’s necessary to use the below personal protective equipment when operating and maintaining the UMHPI/UMHPI V units,
Protective clothing: Service man or who operates on the plant systems should wear protective clothing that
complies with the basic safety requirements currently in force. In case of slippery floors, users have to wear
safety shoes with non-slip soles.
Gloves: Protection gloves should be used during maintenance or cleaning operations.
Mask and goggles: Respiratory protection (mask) and eye protection (goggles) should be used during
cleaning and maintenance operations.

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3.2 HEALTH AND SAFETY OF WORKERS
The European Community has adopted a number of directives on workplace’s health and safety, which include 89/391/CEE,
89/686/CEE, 2009/104/CE, 86/188/CEE and 77/576/CEE directives. Every employer shall implement such provisions and ensure
that workers respect them:
It’s forbidden:
•To remove and/or tamper with any safety device.
•The access to the electrical board by unauthorized persons
•To carry out any work on the equipment under voltage
•To touch the equipment if you are not allowed.
•The use of the appliance by children or unassisted disabled persons.
•To touch the appliance when barefoot or parts of the body are wet or damp
•To clean the unit when the power is ‘ON’.
•To pull, remove or twist the electrical cables coming out from the unit.
•To step with your feet on the appliance, sit down and/or place any type of object.
•To spray or pour water directly on the unit.
•To dispose of, abandon or leave within reach of children packaging materials (cardboard, staples, plastic bags,
etc.) as they may represent an environmental and health hazards.
•To tamper with or replace parts of the equipment without the specific consent of the manufacturer. The
manufacturer shall have no whatsoever civilian or penal responsibility in case of unauthorized operations.
WARNING:
•Before proceeding, you should read the user’s-installer manual accompanying appliance.
•All the operations described below must be carried out only by QUALIFIED PERSONNEL.
•The wiring to the terminal block must be performed by qualified personnel.
•Any routine and/or not-routine maintenance operation shall be carried out when the equipment has been shut
down, disconnected from electric power supply.
•Do not put neither your hands nor insert screwdrivers, spanners or other tools into moving parts of the
equipment
•The equipment’s supervisor and the service man have to receive suitable training for performing their tasks in
safety.
•The access to the electric panel is limited only for authorized personnel.
•Operators have to know how to use personal protective devices and have to know the accident-prevention
guidelines contained in national and international laws and norms.
•The operator’s workplace has to be kept clean, tidy and free from objects that may prevent free movements.
Appropriate lighting of the work place shall be provided so as to allow the operator to carry out the required
operations safely. Poor or too strong lighting can cause risks.
•Ensure that the work places are always adequately ventilated and that aspirators are working, in good
condition and in compliance with the requirements of the laws in force.
•Not all the configurations can be simultaneously enabled and/or changed.
•Other values different than those of default can ensure the proper operation of the unit, in case of doubt about
the value to be set contact please our office.
•The company excludes any contractual and extra contractual liabilities for damages caused to persons, animals
or objects, by incorrect installation, setting and maintenance, improper use of the equipment, and the partial or
superficial reading of the information contained in this guide.
•The access to the electrical board by unauthorized persons is forbidden.
•It’s forbidden to carry out any work on the equipment under voltage.
•It’s forbidden to touch the equipment if you are not allowed.
Requirements before performing electrical work on the control panel:
•Turn off the unit from the control panel ("OFF" displayed).
•Put the switch “QF” general differential on OFF position
•wait for 15 seconds before getting access to the electric board
•Check the ground connection before beginning any operation.
•Be sure that you are well insulated from the ground, with dry hands and feet, or by using insulating platforms
and gloves.
•Check that there is no foreign material near the system.
4PURPOSES AND CONTENTS OF THE MANUAL
This manual provides basic information as for the configuration of the panel controller of UMHPI/UMHPI V units.
It is addressed to the installer and the user of the unit: it allows you to operate this equipment efficiently, even if the user does not
have any previous specific knowledge of it.

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Not all the described functions can be individually and/or simultaneously selected. Please contact the technical office for any
information.
This manual describes the characteristics of the equipment when it was being put on the market; therefore, it may not capture
later technological improvements introduced by the company as part of its constant endeavour to enhance the performance,
ergonomics, safety and functionality.
The company introduces also technological improvements and is not constrained to update the manuals for previous versions of
appliances that could not be compatible. So make sure to use, for the installed unit, the supplied manual.
It’s recommended that, the user must follow the instructions contained in this booklet, especially those concerning the safety and
routine maintenance.
5SYSTEM ARCHITECTURE
The system UMHPI is composed of an electronic controller device:
a) CB = on-board (Master) controller located on the front panel of the unit.
As for UMHPI V models and if are equipped with the optional kit mod. GI, the system includes an additional controller.
b) SL1 = on-board (Slave 1) controller inside the electric panel of the unit.
The CB controller of the unit manages the Modbus communication of the whole.
N.B. This guide describes the control logics and functions that can be enabled by the CB unit controller
FRONT PANEL
INTERNAL ELECTRIC
PANEL
Included in UMHPI V series and in UMHPI
models that are equipped with the
optional mod. GI kit
CB – SL1 ModBus communication
CB On-board controller
(Master)
SL1 On-board controller
(
Slave 1
)

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6USER – CB MASTER CONTROLLER INTERFACE
It is used to select the operating mode, and to reset the manual resetting alarms. The operating mode changes as
per the sequence below each time you press the Mode button:
off cool heat off
If the Domestic Hot Water (DHW) mode is enabled, the sequence is as follows:
off cool cool+sanheat heat+sanoff
During the parameters’ setting, this button can be used to revert BACK to the previous level.
It allows you to enter into the setting menu parameters and to select the cool/summer, heat/winter and DHW
set point value.
UP button: In the setting mode, this button allows you to move up to a higher menu or to increase the value of a
parameter when you are in the “edit” mode.
DOWN button: In the setting mode, this button allows you to shift to a lower menu or to decrease the value of a
parameter when you are in the “edit” mode.
WARNING
All the operations described below must be carried out only by qualified personnel.
Not all the configurations can be simultaneously enabled and/or changed.
Other values different than those of default can ensure the proper operation of the unit, in case of doubt about
the value to be set contact please our office.
The company excludes any contractual and extra contractual liabilities for damages caused to persons, animals
or objects, by incorrect installation, setting and maintenance, improper use of the equipment, and the partial or
superficial reading of the information contained in this manual.
6.1 MENU STRUCTURE DIAGRAM

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Level 0 (U) = always appearing
Level 1 (M) = it appears if you enter the maintainer or manufacturer password
Level 2 (C) = it appears if you enter the manufacturer password
Level 3 (A) = it appears only via Modbus
6.2 ANALOG INPUTS
By entering the maintainer password in the menu of analog inputs "tP", at the level 1 of the menu structure diagram of the on-
board control panel, you can read the values of the current probes:
tp DESCRIPTION Unit
t01 Water inlet temperature (°C)
t02 Water outlet temperature (°C)
t03 Compressor inlet temperature (°C)
t04 Compressor outlet (discharge) temperature (°C)
t05 High pressure (bar)
t06 Low pressure (bar)
t07 Outdoor air temperature (°C)
t08 DHW temperature (if DHW is enabled) (°C)
t09 DHW temperature (if DHW production is enabled) (°C)
*t11 Plant circuit remote temperature sensor (if enabled) (°C)
**t15 Injection pressure (bar)
**t17 Injection temperature (°C)
(*) Present in the UMHPI V models or with the optional kit mod. Gi in the the models UMHPI.
(**) Present in the UMHPI V models
6.3 PARAMETERS CATEGORIES
The parameters are classified into groups, each group is identified by a 3-digit code, while the index of each parameter is preceded
by a letter.
DESCRIPTION GROUP IDENTIFICATION CODE PARAMETER INDEX VISIBILITY
Configuration CnF H- USER/INSTALLER
Compressor CP C- INSTALLER
Fan-motor FAn F- INSTALLER
Alarms ALL A- INSTALLER
Regulation Re b- INSTALLER
Pump PUP P- INSTALLER
Electric heater Fro r- INSTALLER
Defrosting dFr d- INSTALLER
Electronic expansion valve EEu U- INSTALLER
Offset OFF o- INSTALLER
**Mixer valve rAd i- INSTALLER
**Solar SUn S- INSTALLER
*Vapor injection Eiu u- INSTALLER
Inverter compressors nCP n- INSTALLER
**DHW preparer AcS Ac- USER/INSTALLER
(*) Parameters present in UMHPI V series
(**) Parameters present with the optional KIE module
6.4 ADJUSTABLE SETPOINT BY THE USER
SETPOINT DESCRIPTION UNIT DEFAULT RANGE
Coo Summer mode first setpoint
°
C7.0 5÷18
Hea Winter mode first setpoint
°
C 45.0 35÷57
*San DHW mode setpoint
°
C 48.0 25÷57
Co2 Summer mode second setpoint
°
C 18.0 Coo÷23
He2 Winter mode second setpoint
°
C 35.0 25÷Hea
**rCO Mixer valve setpoint in Summer mode
°
C 15.0 -50.0÷80.0
rHE Mixer valve setpoint in Winter mode
°
C 30.0 -50.0÷80.0
ACS DHW instantaneous production setpoint
°
C 45.0 0.0÷80.0
(*) Adjustable Setpoint if the DHW function is enabled.
(**) Adjustable Setpoint if the optional KIE module is included.

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6.4.1 DISPLAY
In normal view displays the outlet water temperature reported to tenths of degrees, or the alarm code if at least an alarm is
active. In case of multiple alarms activation, it will display the first alarm, while the second appears when the first is reset. Into the
menu mode, the display depends on the current position where you are.
6.4.2 LED
Compressor LED
•ON if the compressor is running
•OFF if the compressor is off
•FLASHING if timings are in progress waiting for compressor’s start up
Sanitary water LED
•ON if sanitary mode is active
•OFF if the sanitary mode is not active
•FLASHING if sanitary production in progress (sanitary valve is active)
Defrosting LED
•ON in defrost operating mode
•OFF if defrosting mode is disabled or completed
•FLASHING if defrosting cycle interval’s time is in progress.
Antifreeze electric heater LED •The LED is ON if the antifreeze electric heater is active.
Water pump LED •The LED is ON if the water pump is running.
Alarm LED •The LED is ON if an alarm is activated.
Heating mode LED •The LED is ON if the unit is in the heating mode operation.
Cooling mode LED •LED is ON if the unit is in the cooling mode operation.
6.5 INPUT/OUTPUT (I/O) PORTS
The I/O (inputs and outputs) that can be set to enable the control functions are listed below.
In order to set the I/O please enter with service password to the parameters PRGPSSPRG(insert the service
password)PRGParPRGCnF.
Ports Parameter Terminals
Factory Setting Description
Value Function Description
ST8 H19 AID2/AID2 0 Not set
Programmable analog input with NTC sensor 10kΏat 25°C β
3435
ID2 H39 ONOFF/ONOFF 2 From remote on/off Digital input, Voltage free contact. Active function by default.
ID3 H40 SW/SW 3 Remote summer/winter
commutation
Free voltage digital input.
To activate this function see paragraph 7.14.2
ID7 H44 AID2/AID2 0 Not set Free voltage digital input, configurable in alternance of the
analog input ST8 (H19=0)
(1)DO3 H58 AEH (phase)
AEHN (neutral) 0 Not set Single phase output 230Vac, 50Hz, 5A resistives, 1A inductives.
(2)OC1 H61
NO1 (phase)
N1 (neutral)
NC1 (phase)
7 Plant circulator
Switching contact, single phase voltage 230Vac, 50Hz, 5A
resistive, 1A inductive.
•NO1= Normally open
•NC1= Normally-Closed
(1) Only for the model 125
(2) Not selectable if the GI2 is present
Standard on UMHPI V models and is present in the optional kit mod. Gi, in addition, the following I/O resources can be configured:
Ports Parameter Terminals of
reference
Factory Setting Description
Value Function
ST3E H24 AI1E/AI1E 0 Not set Programmable analog input with NTC sensor
10kΏat 25°C β3435
ST7E H28 AID1E/AID1E 0 Not set Programmable analog input with NTC sensor
10kΏat 25°C β3435
ID4E H49 AI1E/AI1E 0 Not set Voltage free contact, configurable
alternatively to the analog input ST3E (H24=0)
ID6E H51 AID1E/AID1E 0 Not set
Free voltage digital input, configurable
alternatively to the analog input ST7E
(H28=0)

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DO1E H63 DO1E (phase)
DO1EN (neutral) 22 Plant auxiliary heater See paragraph 8.1.1
Under voltage output single-phase 230Vac,
50Hz, 5A resistives, 1A inductives.
DO2E H64 DO2E (phase)
DO2EN (neutral) 26 DHW auxiliary heater See paragraph 8.1.3
Under voltage output single phase 230Vac,
50Hz, 5A resistives, 1A inductives.
DO3E H65 DO3E (phase)
DO3EN (neutral) 29 Boiler activation See paragraph 8.2
Under voltage output single phase 230Vac,
50Hz, 5A resistives, 1A inductives.
(3)DO4E H66 DO4E (fase)
DO4EN (neutro) 0 Not set
Under voltage output single phase 230Vac,
50Hz, 5A resistives, 1A inductives.
(3)DO5E H67 DO5E (fase)
DO5EN (neutro) 0 Not set
Under voltage output single phase 230Vac,
50Hz, 5A resistives, 1A inductives.
OC1 H68
NO1E (phase)
N1E (neutral)
NC1E (phase)
25
Double setpoint command
valve
See paragraph 8.4
Switching contact, single phase voltage
230Vac, 50Hz, 5A resistive, 1A inductive.
-NO1= Normally open
-NC1= Normally-Closed
(3)OC2 H69
NO2E (phase)
N2E (neutral)
NC2E (phase)
0 Not set
Switching contact, single phase voltage
230Vac, 50Hz, 5A resistive, 1A inductive.
-NO2= Normally open
-NC2= Normally-Closed
(3) Not selectable in the models of UMHPI V.
7OPERATION LOGIC
The following operation logics are enabled by the master controller (CB), mounted on the front panel of the unit.
7.1 DYNAMIC SETPOINT ADJUSTMENT
The controller can change the setpoint by adding a value depending on the outdoor air temperature sensor. In this case, you need
to change the values of the parameters from b08 to b14 following the indications below (settings to be done by the installer):
Parameters of the controller PAr->rE->
• b08 = dynamic setpoint, enabled = 1/ disabled = 0 (this parameter must be disabled in the case of the use of climatic
compensation by the optional remote touch screen panel Evo Touch).
•b09 = offset max in cooling mode operation.
• b10 = offset max in heating mode operation.
• b11 = Outdoor temperature setting in cooling mode.
• b12 = Outdoor temperature setting in heating mode.
• b13 = Temperature difference in cooling mode operation.
• b14 = Temperature difference in heating mode operation.
Please see paragraph 11.4 for to change the parameters.
Curve of the setpoint variation as a function of the outside temperature:
Cooling

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7.2 SETPOINT ADJUSTMENT FROM 0-10V INPUT
Another type of setting that allows to change the setpoint by adding (or subtracting) a value in function of the 0-10V analogue
input (if enabled). To enable the function, you must set the H21 parameter to be 40, and change the values of the parameter b15
(range 0-10), taking into account that:
-if the input is at 0 volts you will have the actual set point: set point (Coo/Hea) - b15/2.
-if the input is at 5 volts the set point will be the set of (Coo/Hea) mode.
-if the input is 10 volts you will have the actual set point: set point (Coo/Hea) + b15/2.
The 0-10V signal must be applied to the terminals AI10+ and AI10- (see the wiring diagrams).
Note: In "cooling" mode, considering that the setpoint by default is set to be 7°C, the parameter (b15) should not assume any
value greater than or equal to 6 in order to prevent that the new setpoint set from 0-10V input to take values below the threshold
of the antifreeze operation which is 4°C. Please see paragraph 11.4 for changing the parameters.
7.3 CIRCOLATOR
The circulator of the pump can be set according to one of the following operation modes:
-Operation by thermo-regulator (default)
-Operation by thermo-regulator with periodic activation
-Continuous operation
The circulator SHUTDOWN immediately if:
−There is a lock pump alarm including the manual reset flow switch alarm. See paragraph 12.1.
−The unit is in stand-by mode or when it’s switched off from remote input (when it’s turned ON) It always turned off with a
delay equal to P02.
The circulator is always running if the antifreeze heaters are ON.
The circulator can be configured with the parameter P03 in order to operate independently than the compressor or under call.
0 = Continuous operation
1 = Operation under the thermoregulatory call
Note: Whenever the flow switch alarm is automatically reset the pump is ON even if the compressor is off.
Contrarily, the circulator remains always in operation if the antifreeze heaters are on or when the hydraulic pump operates in
antifreeze mode. The operation in antifreeze mode will start if the water setting temperature decreases below P04 °C (default
value 5°C), and it will be disabled if the water setting temperature increases above P04+P05 °C (the default value of P05 is 2,0°C).
Heating

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The adjustment of the circulator is linear (see Paragraph 7.3.5). Please see paragraph 11.6 for changing the parameters.
7.3.1 OPERATION BY MEAN OF THE THERMOREGULATOR (Default)
During this operating mode (P03=1, default), the thermo-regulator actuates the circulator; after a time delay of P01 seconds from
startup of the circulator pump, the compressor also will turn on. However, during the power off status, the circulator pump turns
off with a delay time of P02 minutes after turning off status with thermo-regulator actuation (the turning off status is
corresponding to the off status of the compressor).
If the flow switch alarm is active in automatic reset, the pump is anyway on even if the compressor is off.
If you enable the operation of the unit from "DI2" digital input corresponding to the remote "on-off" the circulator will be
activated immediately for 2 minutes regardless of the internal thermoregulation of the unit (the activation of water recirculation in
the plant leads to the correct activation of the thermoregulation).
7.3.2 OPERATION UNDER THERMOREGULATOR CALL WITH PERIODIC ACTIVATION
The function is disabled if P17= 0 (default). If the pump is set to operate by thermos-regulator actuation (P03 = 1, default), it will
be activated periodically for a time period defined by the parameter P17 (in seconds) after a counting time set by the parameter
P16 (in minutes), activated when the pump is turned off for satisfied thermoregulation.
In the case of the activation of the flow switch alarms with automatic reset the pump is still ON even if the compressor is off.
The periodic function is interrupted also in the case of the intervention of the antifreeze thermo-regulator which constrains the
operation of the pump. Please see paragraph 11.6 for changing the parameters.
7.3.3 OPERATION WITH ACTIVE ELECTRIC HEATER
The presence of the optional module “GI” is required for this function.
See paragraph 8.1.6
7.3.4 CONTINUOUS OPERATION
This operating mode is enabled if P03=0, the pump is always turned on and it turns off only when the unit is not operating (OFF).
7.3.5 LINEAR ADJUSTMENT OF THE CIRCULATING PUMP–DOUBLE WATER ΔT
The analog output varies according to difference in temperature between water inlet and water outlet of the heat exchanger. The
controller is enabled setting P12 = 1 and is defined by the following parameters:
•P06 set difference in temperature between water inlet of modulating pump in heating mode
•P07: maximum speed of the modulating pump
•P08: minimum speed of the modulating pump
•P09: set ΔT inlet/outlet water of the modulating pump in cooling mode(°C)

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•P10: Delta modulating pump (°C)
−In cooling mode: ΔT= [Water inlet temperature] – [Water outlet temperature]
−In heating mode: ΔT = [Water outlet temperature] – [Water inlet temperature]
Example in cooling:
If the difference in temperature between water inlet and outlet is greater than P09 + P10, the pump will run at maximum speed.
If the difference temperature between water inlet and outlet is less than P09 - 0.2°C, the pump will run the minimum speed.
In the other cases, the pump modulates trying to match the temperature difference with P09. For the heating mode, the same
considerations are valid with replace only P06 with P09. Please see paragraph 11.6 for changing the parameters.
Warning: During the DHW production mode, the pump is constrained to operate at its maximum speed.
In domestic hot water production mode, the pump will operate at the maximum speed.
7.4 MULTICOMPRESSORS
In case that multiple compressors operate, the adjustment will be done by turning on the first compressor according to the
deviation of the water temperature from the set.
The selection of which compressor that must startup first occurs according to the technique based on the equalization of the
cumulative hours of operation.
The control logic is to have the compressors operating at a frequency near the thermoregulation capacity threshold for to activate
the second step b17 and the nominal HzMaxReg calculated in the different conditions of the water and air temperatures as a
function of the mode of operation.
The activation of the second step will occur only if the frequency of the operating compressor is included between these two
values. It makes sure that only one compressor follows the variations of the thermoregulatory, the other is maintained at the
HzMaxReg.
7.4.1 LOGIC OF ACTIVATION
If the controller regulates all the modulating compressors in operation for to provide a capacity greater than the nominal value for
a continuous time duration equal to b16 seconds, the activation of a further available compressor is required. In case of
unavailability of activation of any compressor, it could also be due to the logic related to the capacity limitations or to the
compressors protection (see envelope paragraph).
For each activation of a new capacity step, the compressors already in operation pass to the minimum operating speed for a
duration of b19 seconds. Please see paragraph 11.6 for changing the parameters.
7.4.2 LOGIC OF RELEASE
If the controller regulates one or more modulating compressors (in operation) for providing the minimum capacity for a period of
time greater than b18 seconds, the compressor will stop operation.
When the release has occurred, you should wait again for a timer period equal to b18 seconds before releasing the capacity step.
Please see paragraph 11.6 for changing the parameters.
WARNING: In the case in which the regulation temperature is found to be lower than Set - b05, the release of the running
compressors occurs sequentially with a minimum time delay between two commutations given by parameter C04, and not
following logic described above.
7.4.3 CAPACITY CONTROL
The regulation of the delivered capacity is always made by only one of the running compressors; the best is to control the
compressor that is not running at minimum or nominal capacity. If there is no compressor running at minimum or nominal
capacity:
−The requests of capacity increasing will be done by selecting among the whole running compressors at the minimum
capacity. The selection will consider the one with lower hours number of operation.

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−The requests of capacity decreasing will be done by selecting among the whole running compressors at the nominal
capacity. The selection will consider the one with higher hours number of operation.
7.4.4 EMERGENCY CONDITIONS
If an alarm is warned by one of the inverters, the compressor corresponding to the faulty inverter cannot startup and the error
code will be displayed, note that, the alarm of any inverter will stop the operation of the whole compressors.
When the serviceman operates on the appliance and decides to make it operating by extruding the compressor related to the
faulty inverter, in order to do that, he must change the value of the parameter N06 from 0 to 1.
Please see paragraph 11.9 for changing the parameters.
This new setting will affect immediately the operation and will be memorized; the serviceman should restore the previous value
once the fault inverter has been repaired or replaced.
7.4.5 DHW LOGIC CONTROL
The maximum serviceable capacity is used always in case of DHW mode operation (like if the controller regulates the compressors
to run always at 100% capacity).
They are active however the various limitations of the maximum frequency that are related to the envelope and to the limitation
for maximum power consumption.
7.4.6 DEFROST FUNCTION CONTROL
In defrosting cycle, when the time period (C11) has finished at the minimum frequency Pa C18 (according to what is required with
the envelope), the regime of the compressor is set by the value of the parameter C19. The compressor speed cannot be adjusted.
Anyway the eventual restrictions obtained from the envelope are still valid. Please see paragraph 11.9 for changing the
parameters.
7.4.7 INVERTER COMPRESSOR CONTROL IN COOLING MODE
The management of the compressors depends on the ambient temperature and on the water temperature setpoint.
The regulation is proportional + integral (PI) with:
ST = regulation temperature sensor
Set cool (G01) = setting of cooling setpoint
b01 = cooling regulator proportional band
b05 = compressor control delta cut-off
b07 = integral time
HzMin = Minimum frequency of operation derived from the algorithms of limitation
HzMaxReg = Maximum working frequency of the compressor in cooling mode based on the limitations described in the
previous paragraphs
The following curve shows the adjustment without integral component (b07 = 0)
During the start-up, the compressor initiates at the minimum speed C12 or C14 (as defined from the envelope) for a given time
period equal to C11 and then changes its speed to C13 for a period equal to C51-C11.
7.4.8 HEATING FUNCTION CONTROL
The compressors are active in heating mode if the heat pump is enabled
•H09 = Configuration of the heat pump presence parameter (0 = Heat pump not present; 1 = heat pump is present)
•ST = regulation temperature sensor
•Set heat G02= setting of heating setpoint
•b02 = compressor regulation band in heat pump mode
•b05 = compressor control delta cut-off
•b07 = integral time
•HzMin = Minimum frequency of operation derived from the algorithms of limitation

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•HzMaxReg = Maximum working frequency of the compressor in cooling mode based on the limitations described in the
previous paragraphs
The following curve shows the adjustment without integral component (b07 = 0)
During the start-up, the compressor initiates at the minimum speed C12 or C14 (as defined from the envelope) for a given time
period equal to C11 and then changes its speed to C13 for a period equal to C51-C11.
7.4.9 TRANSITORY OF STARTING
When the compressors are all off, in conjunction with the pre-opening of the expansion valve, the reversing valve is commutated
in the opposite direction to that required by the actual mode for 5 seconds in order to allow the equilibrium of the optimal
pressures for starting the first capacity step.
7.5 HEAT DISSIPATION FAN MOTOR CONTROL
The control of the dissipation is as a function of the condensing pressure in chiller mode operation, whereas, it depends on the
evaporation pressure in heat pump mode operation.
The adjustment of the fan speed occurs depending on the operation of the compressor.
The fan stop is bypassed for a duration equal F12 beginning from a compressor startup of the circuit. During this period, if the
controller requires the cut-off, the fan will run at minimum speed. Please see paragraph 11.5 for changing the parameters.
7.5.1 FAN SPEED CONTROL
The condensation control is a function of the condensing pressure in chiller mode and the evaporation pressure in heat pump
mode.
The fan speed can be independently controlled from the compressors or under the actuation of the same.
F05= fan output mode
0: if all the compressors of the circuit are switched off and the fan is switched off. The fan stop is bypassed for a period
equal to F12 beginning from a compressor startup of the circuit. During this period, if the controller requires the cut-off, the fan
will run at minimum speed.
1: The fan control is independent from the compressor (the fan motor operates only according to the condensing pressure).
Please see paragraph 11.5 for changing the parameters.
7.5.2 FAN SPEED CONTROL IN COOLING MODE
The fan speed control in cooling mode occurs according to the diagram shown below, where:
F06 = Minimum fan speed in cooling mode;
F07 = Maximum silent fan speed in cooling mode
F08 = Set temperature/pressure to the minimum fan speed in cooling mode
F09 = Fan motor linear band in cooling mode
F10 = Delta cut-off of the fan
F11 = Cut-off hysteresis and silent/maximum fan speed
F13 = Maximum fan speed in cooling mode
F14 = Set temperature/pressure to the maximum fan speed in cooling mode
F6-F10 = Set forced fan stop for low condensing pressure

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7.5.3 FAN SPEED CONTROL IN HEATING MODE
The fan speed control in heating mode follows the diagram shown below, where:
F10 = Delta cut-off of the fan in cooling/heating mode
F11 = Cut-off hysteresis in cooling/heating mode
F15 = Minimum fan speed in heating mode
F16 = Maximum silent fan speed in heating mode
F17 = Set pressure for the minimum fan speed in heating mode
F18 = Fan speed linear band in heating mode
F19 = maximum fan speed in heating mode
F20 = Set pressure for the maximum fan speed in heating mode
F17+F10 = Set forced fan stop for high evaporating pressure
The fan speed can be controlled via analog/digital outputs or, alternatively, via serial on the same serial of the modulating
compressor. Please see paragraph 11.5 for changing the parameters.
7.6 MODULATION FOR OIL RETURN
If this function is enabled in the factory, the return oil cycle will be performed during the compressor startup at the frequency C3
for the period of time C51-C11.
7.7 DEFROSTING CYCLE
The defrost cycle function is available only in heat pump mode and is used to prevent the frost formation on the surface of the
air/air coil. The frost formation on the evaporator, which occurs more frequently at very low ambient temperatures, in addition to
greatly decreasing the thermal efficiency of the unit, it can lead to the risk of damaging the unit itself. The adjustable parameter
d01 enables the defrost operation (=1 enabled defrosting). Please see paragraph 11.7 for changing the parameters.
7.7.1 DEFROST OPERATION SIGNALIZATION
You can configure a digital output for the defrosting process function notification.
In order to enable such function, you should enter into the parameters as following: press PRGPSSPRG(then insert the
service password) PRG PAr PRG CnF
See paragraph 11.2.
Parameter Unit
V
alue Description Terminals Notes
*H61 num 21
Undervoltage output for notification
of the defrost process
NO1(Phase)
N1(Neutral)
Undervoltage output 230V ac, 50Hz, 5A resistive, 1A inductive.
Connect this output to the relay coil in order to get a free
contact.
(*) Alternatively, it is possible to use another output DO or OC, see paragraph 6.5.

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7.8 ALARM NOTIFICATION
You can configure a digital output for alarm notification function.
In order to enable such function, you should enter into the parameters as following: press PRGPSSPRG(then insert the
service password) PRG PAr PRG CnF
See paragraph 11.2.
Parameter Unit Value Description Terminals Notes
*H61 num 24
Undervoltage output
for alarm notification
NO1(Phase)
N1(Neutral)
Undervoltage output 230V ac, 50Hz, 5A resistive, 1A inductive.
Should be connected to the relay coil in order to get a free contact.
(*) Alternatively, it is possible to use another output DO or OC, see paragraph 6.5.
7.9 SUMMER/WINTER OPERATION NOTIFICATION FUNCTION
It is possible to configure a digital output for the notification of the operating mode of the unit, plant side.
The digital output is active during summer operation, while is not active during heating operation or when the unit is OFF.
During the DHW production and the defrosting, the output maintains the setting of the former season.
For enabling this function, you should enter into the parameters as following: press PRGPSSPRG(then insert the service
password)PRGPArPRGCnF:
See paragraph 11.2.
Parameter Unit Value Description Terminals Notes
*H61 num 31
Undervoltage output for
plant season notification.
NO1(phase)
N1(neutral)
Undervoltage output 230V ac, 50Hz, 5A resistive, 1A inductive.
Should be connected to the relay coil in order to get a free contact.
(*) Alternatively, it is possible to use another output DO or OC, see paragraph 6.5.
7.10 COMPRESSOR CRANCKASE HEATER
The crankcase heater operates when the compressor remains off for at least 30 minutes and if the discharge temperature is below
20°C (with hysteresis of 2.0°C). When the compressor restarts, the crankcase heater will stop.
7.11 ANTIFREEZE PROTECTION ELECTRIC HEATERS (IF THE KA ACCESSORY IS PRESENT)
The electric heaters of water antifreeze, installed on the outer surfaces of the evaporator plates, activates even when the unit is
switched off (but energized) if the outlet water temperature goes below r02 °C (default is 4°C) in heating mode or below r03 °C
(default is 4°C) in cooling mode and in shut off condition. The same electric heaters are switched off when the temperature
measured by the outlet water sensor exceeds r02+r06 in heating mode or r03+r06 in cooling mode and in shut off condition (the
default value is r06=2,0°C). The heating cable placed on the basement of the appliance turns on when the outdoor air temperature
decreases below 3°C and the unit starts the defrosting cycle (or if r19=0 even if the unit is not in defrosting cycle, or in stand-by
mode). It will be deactivated if the outdoor temperature exceeds 5°C or the last defrosting cycle is concluded after more than r19
minutes (default 10 minutes) (with r19≠0).
In case you want to produce gelid water, it is necessary to modify the actions of antifreeze resistances, as well as the set of
activation of the antifreeze alarm (A08 = 4°C by default) and its hysteresis (A09 = 3.0°C by default).
7.12 ACTIVATION OF DOMESTIC HOT WATER PRODUCTION
To activate the DHW water production mode, be sure to install a temperature sensor inside the tank and to connect it to the AID2
– AID2 terminals (enabled as analog input). Once the temperature sensor is installed and connected, it is necessary to set the
domestic heat water function.
To enable this function you should get access to the parameters PRGPSSPRG (insert the service password)PRGPAr
PRGCnF
See paragraph 11.2.
I/O Ports - Parameter Value Function
H10
0 (default) Disenabled function
1 Function is active in heating and cooling mode.
The remote on-off function doesn’t disenable the DHW production.
2 Function is active in heating and cooling mode.
The remote on-off function disenables the DHW production.
*H19 6 Enablement of the DHW temperature sensor.
*H61 (active by default OC1) 6 DHW valve command
(*) Alternatively, it is possible to use another I/O ports, see paragraph 6.5.

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If the DHW temperature is below the set point value (adjustable by entering the PRG->Set->SAN menu), the unit activates the
sanitary valve and the compressor is set at the maximum frequency starting the modulation at one degree before the set value
and it stops at one degree after the set value. Once reached the set point value, the valve switches to the stand-by mode and the
compressor works normally.
While shifting from user’s to domestic hot (sanitary) water, the operating sensor changes from “outlet water sensor” to “sanitary
tank sensor”. While shifting from the winter operating mode to the sanitary operating mode, the compressor does not switch off,
and reaches the maximum established frequency that to be controlled; on the other hand, while shifting from the summer
operating mode to the sanitary operating mode, the compressor is switched off to wait for the safety timing.
The defrosting during winter operation mode is always performed on the user side, never on the sanitary water tank.
Note:
-If H10 = 1. The remote turning off the unit (remote onoff), or by the on board unit controller, or by a remote control board does
not affect the sanitary operating mode. The unit starts in sanitary mode as setting priority when it’s powered on. The on board
unit display shows the temperature measured by the sensor placed inside the sanitary water tank. Once the sanitary cycle is
completed, the display returns to show the temperature of the outlet water sensor.
If the remote ON-OFF digital input (onoff-onoff terminals) is open, with the enabling of the domestic hot water production (H10=1
and H20=6), the display on-board unit shows the item "SAN". Once the sanitary cycle is concluded, the display returns to show the
code "E00" indicating that the remote ON-OFF contact is open.
- If H10 = 2, the remote on-off function disenables the production of domestic hot water and the operations of the heat pump in
heating and cooling on plant side.
Example of activation of this function:
H10 = 1
H19 =
6
 DHW temperature sensor [terminals: SAN
–
SAN
]
H61 = 6(default)
 In case of using a 3-way changeover valve with 3 contacts for power supply [terminals: NO1
–
N - NC1]
 In case of using a 3-way changeover valve with 2 contacts for power supply (with spring return),
[terminals: NO1 – N]
•Closed contact NO1 means that the valve is energized and diverts the water flow to the DHW tank.
•Open contact NO1 means that the valve is de-energized and diverts the water flow to users.
For the models UMHPI 60, this function can be activated only with the presence of the optional “GI” module.
7.12.1 MEMORY OF THE SENSOR IN HEATING MODE
In the case of commutation from water users to the domestic hot water, the temperature sensor changes from a "water outlet
temperature sensor" to a "water tank temperature sensor". For such reason, in heating mode, the last value read by the sensor
will be memorized before changing to DHW mode.
When the DHW thermoregulation is reached, the reference temperature on the plant side will take the value which is previously
memorized.
The memory function will be interrupted:
-When the temperature detected by the sensor becomes lower than the memorized value;
-Or after a period of time equal to b06 seconds (default 45 seconds).
For each UMHPI unit (except the last unit of the cascade), you must implement a relay (not included), controlled by the output
230VAC NO1 and Nlocated on the terminal block, that can enable through its free contacts COM and NO the ADI2-ADI2 digital
input of the successive unit in the cascade. For such configuration you may refer to the wiring diagram below.