Waterstage WSYP100DG6 User manual

Operation manual
intended for professionals
and end users.
To be saved for
future consultation
Fujitsu General (Euro) GmbH
Werftstrasse 20
40549 Düsseldorf - Germany
Subject to modications without notice.
Non contractual document.
WSYP100DG6
Heat pump air/water
split system
hydraulic indoor unit
Fujitsu General (Euro) GmbH
Werftstrasse 20
40549 Düsseldorf - Germany
Subject to modications without notice.
Non contractual document.
Document n° 1780-3 ~ 12/04/2016
FR EN DE EN IT
ES PT

Contents
Instructions to be read before using the equipment. . . . . . . . . . . . . . 3
Safety instructions . . . . . . . . . . . . . . . . . . . 3
Start-up . . . . . . . . . . . . . . . . . . . . . 3
Use . . . . . . . . . . . . . . . . . . . . . . . 3
Maintenance. . . . . . . . . . . . . . . . . . . . . . 3
Precautions and warnings regarding your installation. . 4
The outdoor unit . . . . . . . . . . . . . . . .4
The hydraulic unit. . . . . . . . . . . . . . . . 4
Control system . . . . . . . . . . . . . . . . . 4
The radiators . . . . . . . . . . . . . . . . . . 4
Floor-heating systems . . . . . . . . . . . . .4
Fan convectors / Dynamic radiators
with integrated control system . . . . . . . . .4
Domestic hot water (DHW) . . . . . . . . . . . 4
Energy meter . . . . . . . . . . . . . . . . . . 4
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Overall view of the installation . . . . . . . . . . . . . . . . . . . . . . . . .5
Operation of the installation. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
User interface, Room control unit (option) and Room
thermostat (option) . . . . . . . . . . . . . . . . . .6
Description of the display . . . . . . . . . . . . . . . 8
Appliance start up . . . . . . . . . . . . . . . . . . . 9
Quick start-up . . . . . . . . . . . . . . . . . . . . . 9
Setting the time . . . . . . . . . . . . . . . . . . . 10
Structure of the "End user" control menu . . . . . . 11
Parametering the setting . . . . . . . . . . . . . . 12
General . . . . . . . . . . . . . . . . . . . . 12
Setting parameters . . . . . . . . . . . . . . 12
List of "End user" settings . . . . . . . . . . 12
Information display . . . . . . . . . . . . . . . . . 16
Details . . . . . . . . . . . . . . . . . . . . . . . . 16
Operation of the DHW system. . . . . . . . . . . . 17
Selecting cooling mode . . . . . . . . . . . . . . . 17
Pilot wire. . . . . . . . . . . . . . . . . . . . . . . 17
Telephone modem . . . . . . . . . . . . . . . . . 17
Conguring room control unit (option) . . . . . . . . 17
Regular checks . . . . . . . . . . . . . . . . . . . 18
Checking the outdoor unit . . . . . . . . . . . . . . 18
Operation manual "1780 - EN"
Hydraulic indoor unit
- 2 -

1 Instructions to be read before using the equipment
Please comply with the following instructions in order
to avoid any risk of injury or inappropriate use of the
appliance.
1.1 Safety instructions
1.1.1 Start-up
"Do not switch the appliance on until every
llings have been done.
"Do not try to install this appliance yourself.
"This heat pump requires an appropriately
qualied person to install it.
"The installation must always be connected to
the Earth and tted with a protective circuit
breaker.
"Do not modify the electricity supply.
"The appliances are not reproof and should
therefore not be installed in a potentially
explosive atmosphere.
1.1.2 Use
"Do not let children insert foreign bodies into
the fan protection grill or climb on top of the
outdoor unit. The ns on the air exchanger are
extremely ne and cause cuts.
"Nothing should obstruct the air circulation
through the evaporator and from the fan.
"The outdoor unit must only be installed outdoor
(outdoors). If a shelter is required, it must have
broad openings on the 4 walls and observe the
installation clearances (see with your installer).
"Do not climb on the top of the outdoor unit.
"The room in which the appliance is operating
must be correctly ventilated in order to prevent
any loss of oxygen if there is an escape of
refrigerant gas.
"Consult your Installer before making any
changes or modications to the premises where
the appliance is installed.
"Do not place any heat source under the room
control unit.
1.1.3 Maintenance
"Do not try to repair this appliance yourself.
"This appliance does not contain any components
capable of being repaired by the user himself.
Removing one or other of the covers can expose
you to dangerous electrical voltages.
"In any case, switching off the current is not
sufcient to protect you from any external
electrical shocks (capacitors).
"Do not open the outdoor unit or the hydraulic
unit while they are operating.
"Switch off the power supply if there are any
abnormal noises, smells or smoke coming from
the appliance and contact your installer.
"Switch off the power to the appliance before
you clean it.
"Do not use aggressive cleaning liquid or
solvents to clean the body work.
"Do not use a pressure washer to clean the
outdoor unit. This could damage the air
exchanger and the water might penetrate into
the electrical circuits.
Operation manual "1780 - EN" - 3 -
Hydraulic indoor unit

1.2 Precautions and warnings regarding
your installation.
1.2.1 The outdoor unit
The outdoor unit contains the equipment for capturing
energy from the ambient air.
Your installer has placed this unit in a location that
enables it to operate in an optimum manner.
Nothing should obstruct the air circulation through the
evaporator and from the fan.
The water that the air contains condenses and ows
from the external unit.
In cold periods, this water freezes in contact with the
exchanger and is drained away by regular defrosting
cycles. The control system automatically controls the
defrosting cycle, whose operation can lead to the quite
normal emission of steam.
1.2.2 The hydraulic unit
The hydraulic unit contains the heat pump complete control
system, in charge of controlling the heating comfort level
(and the production of domestic hot water - if the installation
is tted with a DHW tank with electrical back-up heating).
The hydraulic unit can be optionally tted with an
electrical back-up system or boiler connection which
starts up in order to provide addtional heating during
the coldest periods.
1.2.3 Control system
Your installer has carefully adjusted your installation.
Do not modify setting parameters without his agreement.
If in doubt, do not hesitate to contact him.
The control system for your heating system is designed
in ow temperature for the water based on the outdoor
temperature (water control).
The installation of a room thermostat (option) allows to
improve operation of the regulation (the inuence of the
room temperature is taken into account).
1.2.4 The radiators
To ensure the function of the regulation with room
inuence, it's necessary that the room in which the room
thermostat is installed has no thermostatic valve or that
they must be completely open.
1.2.5 Floor-heating systems
New oor-heating systems require to be initially heated
slowly to avoid any problems with cracking. Check with
your installer that this initial heating procedure has indeed
been performed before using your heating system freely.
The great stability in a regulation system for oor-heating
systems avoids sharp differences in temperature.
However, this stability involves a reaction time of the
order of several hours, (approx 6 hours).
Any changes to the setting must be made slowly, leaving
the installation time to react. Adjusting the system to
exaggerated setting or in an untimely manner always
results in signicant temperature uctuations during
course of the day.
Similarly if your dwelling has a oor-heating system,
do not reduce the heating or switch it off if you will be
absent for a short period. The reheating period is always
quite long (approx 6 hours).
1.2.6 Fan convectors / Dynamic radiators
with integrated control system
Do not use a room sensor in the area.
1.2.7 Domestic hot water (DHW)
When the DHW production is required, the heat pump
adapts to this demand with higher priority.
No space heating is produced while the domestic hot
water is being prepared.
Domestic hot water (DHW) is produced by the heat
pump and then topped up, if necessary, by electrical
backup heating or the boiler.
To ensure a DHW setting over 45°C, the electrical back-
up heating or the boiler must be left on (Optional boiler
connection kit).
The electrical back-up heating enables anti-legionella
cycles to be conducted efciently.
1.2.8 Energy meter
The hydraulic unit integrates a metering of produced
energy. It uses a owmeter, the ow temperature sensor
and the return temperature sensor.
This function records:
- The total energy production since the start of the
installation
- The yearly production of the last ten years
The unit comes ready to use.
The information inherent to this feature is the following
ones :
- Read the Heat pump ow at the parameter 8460.
- Total energy production since the start at the
parameter 3110 (kWh value) (installer access).
- Yearly production of the last ten years with Heating,
Cooling and DHW*(option) differentiation (kWh).
Parameters (with “N” = current year)
Year Energy in
Heating
Energy in
DHW
Energy in
Cooling
N -1 3121 3122 3123
N -2 3128 3129 3130
N -3 3135 3136 3137
N -4 3142 3143 3144
N -5 3149 3150 3151
N -6 3156 3157 3158
N -7 3163 3164 3165
N -8 3170 3171 3172
N -9 3177 3178 3179
N -10 3184 3185 3186
Operation manual "1780 - EN"
Hydraulic indoor unit
- 4 -

2 Overall view of the installation
Your heat pump has been congured by your installer. It
is composed of the following main elements:
- The outdoor unit is positioned, as its name indicates,
outside your dwelling and extracts energy from the
outside air.
- The hydraulic unit positioned in your boiler room, cellar,
garage or even your kitchen, transfers the energy to
the heating circuit (and the domestic hot water).
- The outdoor sensor detects the outdoor temperature.
Optional equipment:
- Room thermostat.
- Room control unit.
Heat pumps are systems that can be connected to any
form of low temperature heat distribution systems :
the heat captured by the heat pump can therefore be
used in different ways:
- Floor-heating systems.
- Radiators or fan coil heaters.
- Domestic hot water (DHW).
gure 1 - Overall view of the conguration of a complete installation
Outdoor
sensor
Heating circuit
Floor heating system
Heating circuit
Radiators
DHW tank with electrical
back-up heating
Options
depending
on the system
congurations
DHW kit
The hydraulic unit
The outdoor unit
Control
options
or/and
or
Operation manual "1780 - EN" - 5 -
Hydraulic indoor unit
Room thermostat
UTW-C55XA or
UTW-C58XD
Room control unit
UTW-C75XA or
UTW-C78XD

3 Operation of the installation
3.1 User interface, Room control unit (option) and Room thermostat (option)
gure 2 -
°C
Auto
Auto
ESC OK
0 4 8 12 16 20 24
1
2
3
4
5
6
7
8
11
5
2
10
11
Room control unit T75 / T78 Room thermostat T55 / T58
1
2
3
4
5
6
7
8
9
User interface
Operation manual "1780 - EN"
Hydraulic indoor unit
- 6 -
Remote control
UTW-C75XA or UTW-C78XD
Room thermostat
UTW-C55X or UTW-C58XD

Ref. Functions - Denitions
1 Selecting of the DHW operating mode
(Domestic hot water).
On
Off
If the installation is tted with a DHW tank.
-On: Production of DHW according to the time program.
-Off: Preparing the domestic hot water for stopping with the anti-frost function
active.
-Manual start button: Hold down the DHW key for 3 seconds. Switch from
"reduced" to "comfort" until the next time the ECS timer switches over.
2 Digital display. - Operating control. Readout of the current temperature, of the heating mode
and of any faults .
- View the settings.
3 Exit "ESC". - Quit the menu.
4 Navigation and setting. - Selecting the menu.
- Setting parameters.
- Adjusting the ambient temperature setpoint.
5 Selecting the heating mode. -
Auto
Heating operating according to the heating program
(Summer/winter mode switchover is automatic).
- Constant comfort temperature.
- Constant reduced temperature.
- Stand-by mode with anti-frost protection
(Provided that the heat pump's electrical power supply is not interrupted).
6 Information display. - Various data (see page 16).
- Reading error codes (see Installation and operating manual).
- Information concerning maintenance, special mode.
7Conrm "OK". - Input into the selected menu.
- Conrmation of the parameter settings.
- Conrmation of the adjustment to the comfort temp. setting.
8 Selecting cooling mode. - Cooling operating according to the heating program
(Summer/winter mode switchover is automatic).
9 RESET button
(Brief press)
- Reinitialising the parameters and cancelling error messages.
Do not use during normal operation.
10 Control knob. - Adjusting the ambient temperature setpoint.
11 Presence key. - Comfort / Reduced switchover.
Operation manual "1780 - EN" - 7 -
Hydraulic indoor unit

gure 3 -
3.2 Description of the display
Symbols Denitions
- Heating mode active with reference
to the heating circuit.
- Heating in comfort mode.
- Heating in reduced mode.
- Heating in "standby" mode
(freeze protection).
- Cooling mode active.
- Holiday mode activated.
- Process in progress.
- Compressor operation.
- Burner operation.
- Default message.
- Service / Special operation.
INFO - Information level activated.
PROG - Program activated.
ECO - ECO mode activated
(Heating temporarily stopped).
temperature ambiante
- Hour /
Parameter number /
Setpoint value.
temperature ambiante
- Room temperature /
Setpoint value.
temperature ambiante
- Setpoint information /
Parameter Information.
Xxxxxxxxxxxxxxxxxxxxxxxxxxx
Xxxxxxxxxxxxxxxxxxxxxxxxxxx
Xxxxxxxxxxxxxxxxxxxxxxxxxxx
gure 4 - Closing the display
Operation manual "1780 - EN"
Hydraulic indoor unit
- 8 -

3.3 Appliance start up
• The installation and 1st start up of the appliance
must be done by a qualied installer. That person will
also give you instructions on starting and running the
appliance.
• Ensure that the installation is fully lled with water
and has been correctly bled and that there is a
sufcient pressure of 1,5 to 2 bars on the manometer
(ref. 2, gure 5).
• Close the installation's main circuit breaker.
In winter, so that the compressor can be
preheated, close the installation's main circuit
breaker (outdoor unit's power supply) some
hours before pressing the on/off button.
3.4 Quick start-up
Once your installer has started your installation for the
rst time:
• Engage the start/stop switch.
During the regulator initialisation phase, the
display shows all the symbols and then "Data,
update" and then "State heat pump".
• Select the "AUTO" heating mode (gure 6).
• Select the DHW mode (gure 6).
• Adjust the date and time if necessary (gure 7).
gure 5 - Start-up
1. User interface
2. Manometer (installation hydraulic pressure)
3. Start/stop switch
1
2
3
gure 6 - Selecting the heating mode AUTO
and Select the DHW mode gure 7 - Setting the time and the date
_______________
Press OK
Press OK
Press OK
Press heating mode key to
return to basic display
Select menu
hour and date
Select one of the
lines :
hour / minutes
or day / month
or years
Make all the
settings
Press OK to
conrm each
setting
Time and date
Operator section
Time and date
Hours / minutes
Time and date
Hours / minutes
Operation manual "1780 - EN" - 9 -
Hydraulic indoor unit

3.5 Setting the time
gure 8 -
04812 16 20 24
AUTO
2
04812 16 20 24
AUTO
3
04812 16 20 24
AUTO
4
04812 16 20 24
AUTO
1
5
04812 16 20 24
AUTO
6
04812162024
AUTO
Keys Display example Description
Basic display
If the basic display is not shown,
press ESC to return to it
Press OK to conrm.
Turn the knob
Select menu hour and date
Press OK to conrm.
Turn the knob
Select line 1 Hours / minutes
Press OK to conrm.
The hour display ashes
Turn the knob to set the time
Press OK to conrm.
The minutes display ashes
Turn the knob to set the minutes
Press OK to conrm.
The setting are recorded
Room temperature
Time and date
Operator section
Time and date
Hours / minutes
Time and date
Hours / minutes
Time and date
Hours / minutes
Time and date
Hours / minutes
Turn the knob to make other settings
or
Press heating mode key to return to
basic display.
Operation manual "1780 - EN"
Hydraulic indoor unit
- 10 -

3.6 Structure
of the "End user" control menu
1
2
3
20
500
501
502
503
504
505
506
515
516
641
642
643
648
710
712
714
6711
7141
8410
8412
8413
8700
8701
8702
...
8900
65 °C
1610
1 ...24h
0...60 min
28 °C
4°C...
...
English, German...
Basic
display
Brief
press
End user Commissioning Engineer OEM
Time of day and date Hours / minutes
Day / Month
Year
Hours
Minutes
Operator section Language
Time prog heating circuit 1
Time prog heating circuit 2
Time program 4/DHW
Pre-selection
Pre-selection
1st phase on
1st phase off
1st phase on
1st phase off
2nd phase on
2nd phase off
3rd phase on
3rd phase off
Default values
Copy
Mon-Sun
Mon-Fri
Sat-Sun
Monday
Tuesday
…
Sunday
Holidays heating circuit 1
Holidays heating circuit 2 Operation level
Period 1
Period 2
...
Period 8
Heating circuit 1
Heating circuit 2
Comfort setpoint Reduced temp...
Reduced setpoint
Temp. frost protect... comfort
Frost protect. setpoint
reduced temp.
Domestic hot water Nominal setpoint
Reduced temp...
Fault Reset HP No, Yes
Service/special operation
Emergency operation
Off, On
Diagnostics heat generation
Return temp HP
Flow temp HP
Compressor modulation
Diagnostics consumers Outdside temp.
Reset outside temp min
Off, On
Reset outside temp max
Swimming pool temp.
gure 9 -
Operation manual "1780 - EN" - 11 -
Hydraulic indoor unit

3.7 Parametering the setting
3.7.1 General
Only the parameters accessible to levels:
End user
... are described in this document.
The parameters accessible at level:
Commissioning
Engineer
… are described in the document reserved for
these professional specialists. Do not make any
modications to these parameters without advice
from these professional specialists. Incorrect use
of any kind may result in serious malfunctioning.
3.7.2 Setting parameters
With the screen on basic display.
- Press OK.
Once in "End user" level.
- Scroll the menu list.
- Choose the desired menu.
- Scroll the function lines.
- Choose the desired line.
- Adjust the parameter.
- Check the setting by pressing OK.
- To return the menu, press ESC.
If no setting is made for 8 minutes, the screen returns
automatically to the basic display.
3.7.3 List of "End user" settings
Line Function Setting range
or display
Setting range
or display
Basic
setting
Time and date
1 Hours / minutes 00:00... 23:59 1
2 Day / Month 01.01... 31.12 1
3 Year 1900... 2099 1
User interface
20 Language English, Deutsch, Français,
Italiano, Nederlands,...
English
OK Brief
press End user
OK OK OK
Time and date Hours / minutes 1 Hours 1...24 h
User interface Day / Month 2 Minutes 0...60 min
CC1 time program Year 3
...
Operation manual "1780 - EN"
Hydraulic indoor unit
- 12 -

Line Function Setting range
or display
Setting range
or display
Basic
setting
Heating / Cooling time program, circuit 1
500 Pre-selection (Day / Week) Mon-Sun, Mon-Fri, Sat-Sun,
Monday, Tuesday, …
Mon-Sun
501 1st phase On (start) 00:00... --:-- 10 min 6:00
502 1st phase Off (end) 00:00... --:-- 10 min 22:00
503 2nd phase On (start) 00:00... --:-- 10 min --:--
504 2nd phase Off (end) 00:00... --:-- 10 min --:--
505 3rd phase On (start) 00:00... --:-- 10 min --:--
506 3rd phase Off (end) 00:00... --:-- 10 min --:--
515 Copy
516 Standard values, Circuit 1 No, Yes No
Yes + OK: The standard values memorised in the regulator replace and cancel the customised heating programs. Your
customised settings are therefore lost.
Time program 4 / DHW
If the installation is tted with the DHW kit.
560 Pre-selection (Day / Week) Mon-Sun, Mon-Fri, Sat-Sun,
Monday, Tuesday, …
Mon-Sun
561 1st phase On (start) 00:00... --:-- 10 min 00:00
562 1st phase Off (end) 00:00... --:-- 10 min 05:00
563 2nd phase On (start) 00:00... --:-- 10 min 14:30
564 2nd phase Off (end) 00:00... --:-- 10 min 17:00
565 3rd phase On (start) 00:00... --:-- 10 min --:--
566 3rd phase Off (end) 00:00... --:-- 10 min --:--
575 Copy
576 Standard values No, Yes No
Yes + OK: The standard values memorised in the regulator replace and cancel the customised heating programs. Your
customised settings are therefore lost.
Holidays, heating circuit 1 (For the Holiday program is active, the heating mode should be on AUTO).
641 Preselection Period 1 to 8 Period 1
642 Date holidays start (Day / Month) 01.01... 31.12 1
643 Date holidays end (Day / Month) 01.01... 31.12 1
648 Heating schedule during the holidays Frost protection, Reduced Frost
protection
Heating adjustment, circuit 1
710 Comfort ambient temperature setpoint Reduced setpoint…
Comfort setpoint max
0,5 °C 20 °C
712 Reduced ambient temperature setpoint Frost-free temp…
Comfort temperature
0,5 °C 19 °C
714 Frost-free ambient temperature setpoint 4 °C… Reduced temperature 0,5 °C 8 °C
Cooling circuit 1
901 Operating mode Off, Automatic Off
902 Comfort cooling setpoint 17... 40 °C 0,5 °C 24 °C
903 Reduced cooling setpoint 17... 40 °C 0,5 °C 26 °C
Operation manual "1780 - EN" - 13 -
Hydraulic indoor unit

Line Function Setting range
or display
Setting range
or display
Basic
setting
DHW setting (domestic hot water)
If the installation is tted with the DHW kit.
1610 Comfort setting Reduced setting (line 1612)…
65 °C 155 °C
The backup electrical system is required to reach this level.
1612 Reduced setting 8 °C...
Comfort setting (line 1610)
140 °C
Energy meter
3121 Heat delivered heating 1 --
3122 Heat delivered DHW 1 --
3123 Cooling delivered cooling 1 --
3124 Not used --
3125 Not used --
3126 Not used --
3128 Heat delivered heating 2 --
3129 Heat delivered DHW 2 --
3130 Cooling delivered cooling 2 --
3131 Not used --
3132 Not used --
3133 Not used --
3135 Heat delivered heating 3 --
3136 Heat delivered DHW 3 --
3137 Cooling delivered cooling 3 --
3138 Not used --
3139 Not used --
3140 Not used --
3142 Heat delivered heating 4 --
3143 Heat delivered DHW 4 --
3144 Cooling delivered cooling 4 --
3145 Not used --
3146 Not used --
3147 Not used --
3149 Heat delivered heating 5 --
3150 Heat delivered DHW 5 --
3151 Cooling delivered cooling 5 --
3152 Not used --
3153 Not used --
3154 Not used --
3156 Heat delivered heating 6 --
3157 Heat delivered DHW 6 --
3158 Cooling delivered cooling 6 --
3159 Not used --
3160 Not used --
Operation manual "1780 - EN"
Hydraulic indoor unit
- 14 -

Line Function Setting range
or display
Setting range
or display
Basic
setting
3161 Not used --
3163 Heat delivered heating 7 --
3164 Heat delivered DHW 7 --
3165 Cooling delivered cooling 7 --
3166 Not used --
3167 Not used --
3168 Not used --
3170 Heat delivered heating 8 --
3171 Heat delivered DHW 8 --
3172 Cooling delivered cooling 8 --
3173 Not used --
3174 Not used --
3175 Not used --
3177 Heat delivered heating 9 --
3178 Heat delivered DHW 9 --
3179 Cooling delivered cooling 9 --
3180 Not used --
3181 Not used --
3182 Not used --
3184 Heat delivered heating 10 --
3185 Heat delivered DHW 10 --
3186 Cooling delivered cooling 10 --
3187 Not used --
3188 Not used --
3189 Not used --
Error
6711 Heat pump Reset No, Yes No
Maintenance / special regime
7141 Emergency regime Off, On Off
Off: Heat pump functions normally (with boosters if necessary).
On: Heat pump uses the electric boost system or the boiler connection.
Use the “On” position only in Assist mode or Test mode: may result in high power bills.
Diagnostics consumers
8700 Outside temperature -50... 50 °C --
8701 Minimum outside temperature
Reset ? (no, yes)
-50... 50 °C --
8702 Maximum outside temperature
Reset ? (no, yes)
-50... 50 °C --
8740 Room temperature 1 0... 50 °C --
Ambient temperature setting 1 20 °C
8743 Flow temperature 1 0... 140 °C --
Flow temperature setpoint 1 --
Operation manual "1780 - EN" - 15 -
Hydraulic indoor unit

- Various data (see below).
Designation Line
Floor drying current setpoint . -
Current drying day. -
Terminated drying days. -
State heat pump. 8006
State DHW. 8003
State heating circuit 1. 8000
State cooling circuit 1. 8004
Outdoor temperature. 8700
Room temperature 1. 8740
Room setpoint 1.
Flow temperature 1. 8743
Flow temperature setpoint1.
DHW (domestic hot water) temperature. 8830
Heat pump return temperature. 8410
Setpoint (return) HP.
Heat pump ow temperature. 8412
Setpoint (ow) HP.
3.9 Details
If the electrical power supply has been cut off while
the heat pump is operating (electrical power failure or
unprogrammed pressing of the on/off switch on the
hydraulic unit) the display will show error 370 when
the appliance restarts. Do not be concerned, the
communication between the outdoor and hydraulic unit
will re-establish itself in a few moments.
3.8 Information display
Various data can be displayed by pressing the info
button.
Depending on the type of unit, conguration and
operating state, some of the info lines listed below may
not appear.
- Possible error messages: The display shows the "Bell"
symbol .
"Consult your heating technician.
- Service messages ; Special mode messages:
The display shows the “Key” symbol .
"Consult your heating technician.
Operation manual "1780 - EN"
Hydraulic indoor unit
- 16 -

3.10 Operation of the DHW system
The key enables you to switch the DHW (domestic hot
water) mode on and off. The selection is shown by a
bar, which appears under the corresponding symbol.
Manual activation: Hold down the DHW key for 3
seconds (Switch from "reduced" to "nominal" until the
next time the DHW timer switches over).
To ensure a DHW setting over 45°C, the electrical back-
up heating or the boiler must be left on.
In order to optimise operation of the DHW, it is possible to:
- Program the timer settings (parameters 560 to 576),
- Adjust the comfort temperature set point (parameter 1610),
- Adjust the reduced temperature set point (parameter 1612).
Press the info key to obtain the details on the DHW
(temperature setting operation).
3.11 Selecting cooling mode
The key activates and deactivates cooling mode.
3.12 Pilot wire
It's possible to order up to 15 electric heaters via output
"pilot wire".
The "pilot wire" handles only the hourly operation
of electric heaters (comfort mode / reduced mode
commutation and Frost protection mode).
The comfort temperature setting should be done
directly on the electric heater(s). The "pilot wire" does
not handle the temperature of the electric heaters.
Refer to the manual supplied with the electric heater(s).
Put the electric heaters on "PROG" mode or "AUTO"
mode for piloting by the regulation board.
The difference between the comfort temperature and
the reduced temperature is from 3,5 ° C.
Frost protection temperature is set directly on the
electric heaters. Refer to the manual supplied with the
electric heater(s).
In the absence of signal, electric heaters operating in
comfort mode.
3.13 Telephone modem
It is possible to command the switching of the heating
mode to the "freeze" protection mode / reduced
(and vise versa) on the heat pump using a modem contact.
The telephone command switches the current heat
pump settings to "freeze" protection mode / reduced
(and vise versa). In accordance with the setting, any
temperature requests from the heating circuits and the
DHW are ignored or activated.
The "freeze" protection mode / reduced must not be
selected on the heat pump and/or the remote control.
See with your installer.
3.14 Conguring room control unit (option)
In the event that the room control unit (see gure 2),
is used, on start-up, after initialising for around
3 minutes, the language needs setting:
- Press OK.
- Choose menu "Operator section".
- Choose language "Language" English.
gure 10 - Select the DHW mode
gure 11 - Information key
Brief
press
Details of any error
Operating values
...
gure 12 - Selecting cooling mode
gure 13 - Selecting the frost protection
Operation manual "1780 - EN" - 17 -
Hydraulic indoor unit
(if kit regulation extension UTW-KREXD)
(if kit regulation extension UTW-KREXD)

4 Maintenance
In order to insure your appliance operates correctly for
many years, the maintenance operations described
below are required at the start of each heating season.
Generally, these are performed as part of a service
contract.
4.1 Regular checks
- Periodically check the water pressure in the heating
circuit (Refer to the pressure recommended by the
installer - between 1 to 2 bar).
- If lling and re-pressurization are required, check what
type of uid has been used initially (If in any doubt,
contact your installer).
- If frequent rells are required it is essential that you
look for any leaks.
"The frequent water supply is at risk of scaling for
the Heat exchanger and degrades performance
and longevity of it.
4.2 Checking the outdoor unit
Dust off the heat exchanger if necessary, being careful
not to damage the ns.
Check that there is nothing obstructing the passage of air.
• Checking the refrigeration circuit
When the refrigerant charge is in excess of 2kg
(models > 8 kW) it is compulsory to have an approved
after sales service check the refrigeration circuit every
year (with a certicate of capacity for the handling of
refrigerants). Consult your heating technician.
Operation manual "1780 - EN"
Hydraulic indoor unit
- 18 -


Operation manual "1780 - EN" - 19 -
Hydraulic indoor unit

Date of installation :
Contact of your heating technician or your after-sales service.
This appliance is marked with this symbol. This means that electrical and electronic products shall not be mixed with general household waste.
European Community countries(*), Norway, Iceland and Liechtenstein should have a dedicated collection system for these products.
Do not try to dismantle the system yourself as this could have harmful effects on your health and on the environment.
The dismantling and treatment of refrigerant, oil and other parts must be done by a qualied installer in accordance with relevant local and national regulations.
This appliance must be treated at a specialized treatment facility for re-use, recycling and other forms of recovery and shall not be disposed of in the municipal waste stream.
Please contact the installer or local authority for more information.
* subject to the national law of each member state
Subject to modications without notice. Non contractual document.