TESY MultiThermica Use and care manual

EN
User and installer manual
Tesy Residential Heat Pump
MultiThermica (Max)
Control Panel
Rev. 00 - 30.10.2022

2
Markings
Conformity
Refer to the Installer Manual of the paired unit.
First of all, we would like to thank you for having chosen a device of our production.
We are sure you will be happy with it because it represents the state of the art in the technology
of home air conditioning.
By following the suggestions contained in this manual, the product that you have purchased
will operate without problems giving you optimum room temperatures with minimum energy
costs.
Tesy Ltd.

3
TABLE OF CONTENTS
1 General information � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � p. 5
1.1 About the manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 5
1.1.1 Editorial pictograms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 5
1.1.2 Pictograms on the product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 5
1.1.3 Recipients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 6
1.1.4 Manual organisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 6
1.2 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 6
2 Use � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � p. 8
2.1 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 8
2.1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 8
2.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 8
2.1.3 Keys functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 9
2.2 Control activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 9
2.3 Basic function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 9
2.3.1 Selecting the operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 9
2.3.2 Fast Heat function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 10
2.3.3 Silent function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 10
2.4 Advanced features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 11
2.4.1 Domestic hot water temperature setting. . . . . . . . . . . . . . . . . . . . . . . . . . . p. 11
2.4.2 Date and time setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 12
2.4.3 Language setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 13
2.5 Alarm signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 14
2.6 Manual reset of alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 14
3 Menu structure� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � p. 15
3.1 Remote Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 15
3.1.1 Menu navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 15
3.1.2 Change installer password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 15
3.1.3 Structure overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 16
3.1.4 Structure details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 16
4 Function setting Indoor Unit Without Integrated Water Tank � � � � � � � � � � � � � � � � p. 23
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 23
4.2 Plant water management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 23
4.2.1 Schematicdiagramwithdirectdeliveryandbuertank . . . . . . . . . . . . . . . . . . . . p. 24
4.2.2 Schematic diagram with hydraulic separator and secondary pump . . . . . . . . . . . . . . . p. 25
4.2.3 Principle diagram with direct delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 26
4.2.4 Plant cooling/heating function enabling from TA . . . . . . . . . . . . . . . . . . . . . . . p. 26
4.2.5 Heating logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 27
4.2.6 Cooling logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 28

4
4.3 Domestic hot water management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 29
4.3.1 Schematicdiagramwithinstantaneousdomestichotwaterstoragetankandheatingelements . . . p. 29
4.3.2 Schematic diagram with sanitary hot water storage and heating generator . . . . . . . . . . . . p. 30
4.3.3 Enable domestic hot water production . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 30
4.3.4 Domestic hot water logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 31
4.4 Auxiliary heater management (heating element or support heat generator) . . . . . . . . . . p. 31
4.4.1 Activation logics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 31
4.5 Dynamic set adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 33
4.5.1 Function enabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 33
4.5.2 Heating mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 33
4.6 Anti-Legionella . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 34
4.6.1 Function enabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 34
4.6.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 34
5 Function setting Indoor Unit With Integrated Water Tank � � � � � � � � � � � � � � � � � � � p. 36
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 36
5.2 Plant water management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 36
5.2.1 Schematic diagram with hydraulic separator and secondary pump . . . . . . . . . . . . . . . p. 37
5.2.2 Plant cooling/heating function enabling from TA . . . . . . . . . . . . . . . . . . . . . . . p. 38
5.2.3 Heating logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 39
5.2.4 Cooling logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 40
5.3 Domestic hot water management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 41
5.3.1 Schematic diagram with sanitary hot water storage and heating generator . . . . . . . . . . . . p. 41
5.3.2 Enable domestic hot water production . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 41
5.3.3 Domestic hot water logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 42
5.4 Auxiliary heater management (heating element or support heat generator) . . . . . . . . . . p. 42
5.4.1 Activation logics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 42
5.5 Dynamic set adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 43
5.5.1 Function enabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 43
5.5.2 Heating mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 44
6 Troubleshooting � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � p. 45
6.1 Troubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 45

5
GENERAL INFORMATION
GENERAL INFORMATION
1�1 About the manual
This manual was written to provide all the explanations for the correct management of the appliance.
 This instruction manual forms an integral part of the device and therefore must be carefully preserved and must ALWAYS
travel with it, even if you transfer the device to another owner or relocate it to other premises. If the manual gets damaged
or lost, download a copy from the website.
 Read this manual carefully before proceeding with any operation and follow the instructions in the individual chapters.
 The manufacturer is not responsible for damages to persons or property caused by failure to follow the instructions in
this manual.
 This document is restricted in use to the terms of the law and may not be copied or transferred to third parties without
the express authorization of the manufacturer.
1�1�1 Editorial pictograms
The pictograms in the next chapter provide the necessary information for correct, safe use of the machine in a rapid, unmis-
takableway.
Related to security
 High risk warning (bold text)
• Theoperationdescribedabovepresentsariskofseriousphysicalinjury,fatality,majordamagetotheapplianceand/or
to the environment if not carried out in compliance with safety regulations.
 Lowriskwarning(plaintext)
• Theoperationdescribedabovepresentsariskofminorphysicalinjuryorminordamagetotheapplianceand/ortothe
environment if not carried out in compliance with safety regulations.
 Prohibition(plaintext)
• Refers to prohibited actions.
 Important information (bold text)
• Thisindicatesimportantinformationthatmustbetakenintoaccountduringtheoperations.
In the texts
– procedures
• lists
In the control panels
– actions required
Expected responses following an action.
Inthegures
1 The numbers indicate the individual components.
A The capital letters indicate component assemblies.
1 Thewhitenumbersinblackmarksindicateaseriesofactionstobecarriedoutinsequence.
A Theblackletterinwhiteidentiesanimagewhenthereareseveralimagesinthesamegure.
1�1�2 Pictograms on the product
Symbols are used in some parts of the appliance:
Related to security
Caution: electrical danger
• Theconcernedpersonnelisinformedtothepresenceofelectricityandtheriskofsueringanelectricshock.

6
GENERAL INFORMATION
1�1�3 Recipients
User
Non-expert person capable of operating the product in safe conditions for people, for the product itself and the environment,
interpretinganelementarydiagnosticoffaultsandabnormaloperatingconditions,carryingoutsimpleadjustment,checking
and maintenance operations.
Installer
Expertpersonqualiedtopositionandconnect(hydraulically,electrically,etc.)theunittotheplant;thispersonisresponsible
for handling and correct installation according to the instructions provided in this manual and the national standards cur-
rently in force.
Toworkontherefrigerationcircuit,theinstallermustcomplywiththeprovisionsofRegulation303/2008/ECwhichdenes,in
accordancewithDirective842/2006/EC,therequirementsforcompaniesandpersonnelwithregardtoxedrefrigeration,air
conditioningandheatpumpequipmentcontainingcertainuorinatedgreenhousegases(F-gaslicence).
Technical Service Centre
Expertandqualiedpersonauthoriseddirectlybythemanufacturertocarryoutallroutineandsupplementarymaintenance
operations,aswellaseveryadjustment,check,repairandreplacementofpartsnecessaryduringthelifeoftheunititself.
ServicepersonnelmustcomplywiththeprovisionsofRegulation303/2008/ECwhichdenes,inaccordancewithDirective
842/2006/EC,therequirementsforcompaniesandpersonnelwithregardtoxedrefrigeration,airconditioningandheat
pumpequipmentcontainingcertainuorinatedgreenhousegases(F-gaslicence).
1�1�4 Manual organisation
The manual is divided into sections each dedicated to one or more target groups.
General information
It addresses all recipients.
Itcontainsgeneralinformationandimportantwarningsthatshouldbeknownbeforeinstallingandusingtheappliance.
Product presentation
It addresses all recipients.
It contains the information to identify the product, its components, compatible accessories and destination of use.
Use
It is addressed exclusively to the User.
It contains all the information necessary for the user to operate the appliance.
Menu structure
It is addressed only and exclusively to the Installer and the Technical Assistance Centre.
It contains the menu structure of the control, the operating parameters, the input and output statuses, the alarms and the
installer parameters.
Functions
It is addressed only and exclusively to the Installer and the Technical Assistance Centre.
ThesearesectionsdedicatedtothedierenttypesofunitsthatusethesameControlPanelandcontainspecicinformation
for that combination.
Troubleshooting
It is addressed exclusively to the Technical Assistance Centre.
Contains troubleshooting concerning the product.
1�2 Disposal

7
GENERAL INFORMATION
Thesymbolontheproductoritspackagingindicatesthattheproductmustnotbetreatedasnormalhouseholdwaste,but
mustbetakentotheappropriatecollectionpointfortherecyclingofelectricalandelectronicequipment.
Proper disposal of this product avoids harm to humans and the environment and promotes the reuse of valuable raw mate-
rials.
Formoredetailedinformationabouttherecyclingofthisproduct,contactyourlocalcityoce,yourhouseholdwastedisposal
service or the shop where you purchased the product.
Illegal disposal of the product by the user involves the application of the administrative sanctions provided for by the regula-
tions in force.
This provision is only valid in the EU Member States.

8
USE
USE
2�1 Interface
2�1�1 Description
The Control Panel regulates and coordinates all the main functions of the appliance. The device can be used to view the ma-
chine status, the main temperatures, the alarms and the main operating mode selection.
2�1�2 Display
Statuses and active alarms on display.
Function area
The appliance is in stand-by mode
Cooling function on
Heating function on
Heating mode for active water frost protection
R
Heating mode with active heating element
 Heatingmodewithauxiliarygenerator(boiler)active
 Heatingmodewithheatingelementandauxiliarygenerator(boiler)
active
S
Silent low-noise function active
Fast heat function active in heating and cooling mode
 Plantwaterfunctionactivewithashingiconandcalledwithxed
icon
 Domestichotwaterfunctionactivewithashingiconandcalledwith
xedicon
!!
Active alarm
!!
Alarm to be reset manually
Temperature area
Plant water temperature
 Domestichotwatertemperature(ifthefunctionhasbeenactivated)
Ext. ambient temperature
Settings area
Settings active. When this symbol is active, the machine parameters
can be changed
A Function area
B Temperature area
C Settings area
Alarm 001 HPump1 PT5
Temperature sensor failure
B
C
A
°
C
°
C
°
C
31
31
4747
1010
!!
S
FH
-
-
-
S

9
USE
2�1�3 Keys functions
 Thiscanbeusedtoswitchtheunitonoro
 Thiscanbeusedtoselecttheoperatingmode(CoolingorHeating)
S
This can be used to activate the Silent low-noise function
This can be used to activate the rapid heating of the plant water
This can be used to modify the selected parameter. Press and hold
the button for 3 seconds to reset the manual alarms
This can be used to enter and exit the main menus, exit without
saving
 Thiscanbeusedtoenterthesub-levelsofthemenusandconrm
selections
This can be used to move between the digits of the values
This can be used to move through the menus and change parameter
values
AKey area
Alarm 001 HPump1 PT5
Temperature sensor failure
A
°
C
°
C
°
C
31
31
4747
1010
S
!!
S
FH
-
-
-
2�2 Control activation
Before the activation:
– set the plant master switch in the ON position.
Thedisplaylightsupinthesetlastmode.IfOFF(icon)appears,theapplianceiso.
°
C
°
C
°
C
31
31
4747
1010
S
!!
S
FH
-
-
-
To activate the device
– pressthekey
The symbol or lights up
 Thedisplayofthecontrolunitwillswitchoafteracertaintime.Touchthescreentoreactivateit.Thelastscreenused
appears on the display.
2�3 Basic function
2�3�1 Selecting the operating mode
Thiscanbeusedtoselecttheoperatingmode(CoolingorHeating)

10
USE
°
C
°
C
°
C
31
31
4747
1010
S
!!
S
FH
-
-
-
Alarm 001 HPump1 PT5
Temperature sensor failure
To select:
– in sequence press the button
The symbol on indicates that Cooling mode is active
The symbol on indicates that Heating mode is active
The unit activates in the selected mode.
The symbol xedindicatesthattheheatpumpisbeingcalled.
The symbol ashingindicatesthattheheatpumphasstartedup.
2�3�2 Fast Heat function
The heat pump is set by default to produce domestic hot water as a priority. If fast heating of the rooms is required, priority
can be temporarily shifted to the production of plant water with the Fast Heat function.
Alarm 001 HPump1 PT5
Temperature sensor failure
°
C
°
C
°
C
31
31
4747
1010
S
!!
S
FH
-
-
-
To activate:
– pressthekey
The symbol appears and the function is on for 90 minutes
To deactivate before the timeout:
– pressthekey
The symbol disappears and the function is o
2�3�3 Silent function
In particular situations, the noise level of the appliance can be reduced by lowering the operating speed of the compressor
and the fan.
 Activating the Silent function reduces the unit performance. Therefore, use is recommended only when necessary and not
for normal operation.