Fujitsu WATERSTAGE 112, WATERSTAGE 140, WATERSTAGE 160 Maintenance Document

29/01/2010

Waterstage 3 phase

Air/Water Heat Pump

Split System, Single Service 3 phase

112, 140 and 160

Document 1394-1 ~ 29/01/2010

Maintenance

Document

Intended for

professional use

Fujitsu General (Euro) GmbH

Werftstrasse 20

40549 Düsseldorf - Germany

Subject to change without notice

Non contractual document

EN

FR NL DE IT

29/01/2010

Contents

1 Technical Characteristics ..............................................................................................6

1.1 Specifications .................................6

1.2 Performance Data ..........................6

1.2.1 Rated Performance..........................6

1.2.2 Maximum Stated Performance ........6

1.2.3 Performance Curves for Waterstage

112................................................................7

1.2.4 Performance Curves for Waterstage

140................................................................7

1.2.5 Performance Curves for Waterstage

160................................................................8

1.3 Hydraulic Characteristics ...............8

1.4 Refrigeration Diagram.................... 9

2 Installation Rules..........................................................................................................10

2.1 Heat Pump ...................................10

2.1.1 Outdoor Units.................................10

2.1.2 Hydraulic Unit.................................11

2.2 Control Terminal...........................12

2.2.1 Room Unit ......................................12

2.2.2 User Interface ................................ 12

2.3 Electrical Connections .................14

2.3.1 Installation Precautions .................14

2.3.2 Electrical Connection Overview..... 14

2.3.3 Hydraulic Unit Connection Diagram16

3 Getting Started..............................................................................................................17

3.1 Checks .........................................17

3.1.1 Outdoor Unit...................................17

3.1.2 Hydraulic Unit.................................17

3.1.3 Hydraulic System ...........................17

3.1.4 Electrical System ...........................17

3.1.5 Refrigeration System .....................17

3.2 Settings ........................................18

3.3 Operating Modes..........................18

3.3.1 Manual Adjustment........................ 18

3.3.2 Auto Adapt Adjustment.................. 20

3.4 Control of Electric Backups.......... 20

3.5 Domestic Hot Water..................... 20

3.5.1 Principle of Operation.................... 21

3.6 Test Mode ....................................21

3.6.1 Sensor and Input Test Mode .........21

3.6.2 Output Test Mode.......................... 22

4 Faults .............................................................................................................................23

4.1 Fault List.......................................23

4.1.1 Hydraulic Unit Fault........................23

4.1.2 Outdoor Unit Fault..........................25

4.2 Outdoor Unit Clearing...................26

4.2.1 Failures with Error Code ................26

4.2.2 Failures With No Error Code..........48

4.3 Sensor Values..............................52

4.3.1 Outdoor Unit Temperature

Sensors.......................................................52

4.3.2 Hydraulic Unit Temperature

Sensors.......................................................52

4.4 Service parts information..............53

4.4.1 Service parts information 1 :

Compressor ................................................ 53

4.4.2 Service parts information 2 : Inverter

compressor................................................. 54

4.4.3 Service parts information 3 : Outdoor

unit electronic expansion valve (EEV,

EEV(INJ))....................................................55

4.4.4 Service parts information 4 : Outdoor

unit solenoid valve (SV).............................. 56

4.5 Operating Limits........................... 57

5 Failures..........................................................................................................................58

5.1 Hydraulic, Electric and Refrigeration

Systems ...................................................58

5.1.1 Hydraulic System ...........................58

5.1.2 Electrical System ...........................59

5.1.3 Refrigeration System ..................... 60

5.2 Compressor Operating Checks.... 62

5.3 Refrigeration Circuit Leak Test ....62

5.4 Troubleshooting ........................... 62

Heat Pump, Split System, Single Service, 3 phase

4 Maintenance Document 1394-1

6 Control Settings............................................................................................................63

6.1 General ........................................ 63

6.2 Function Table ............................. 63

6.3 Adjustment Function Details ........ 69

6.3.1 Date and Time Functions.............. 69

6.3.2 User Interface Functions............... 71

6.3.3 Time Program Functions (heating circuit

1 & 2, DHW, cooling).................................. 73

6.3.4 Heating Circuit 1 & 2 Functions .... 74

6.3.5 Cooling Circuit 1 Functions ........... 82

6.3.6 DHW Functions ............................. 89

6.3.7 Swimming Pool Functions............. 92

6.3.8 Heat Pump Functions ....................92

6.3.9 DHW Tank Functions ....................93

6.3.10 Configuration Functions................. 95

6.3.11 Error Functions ..............................97

6.3.12 Maintenance / Special Operating Mode

Functions .................................................. 101

6.3.13 Input / Output Testing Functions .103

6.3.14 Status Functions.......................... 104

6.3.15 Generator Diagnosis Functions...109

6.3.16 Consumer Diagnosis Functions...110

7 Annual Maintenance Services ...................................................................................113

7.1 Hydraulic Circuit......................... 113

7.2 Outdoor unit ............................... 113

7.3 Electrical .................................... 113

7.4 Operating checks....................... 113

8 Connection Diagrams.................................................................................................114

8.1 Connection Diagram of Hydraulic

Unit..........................................................114

8.2 Connection Diagram of Outdoor

Unit.........................................................115

9 Disassembly Process of Outdoor Unit......................................................................116

9.1 Appearance................................ 116

9.2 Service panel removal ...............116

9.3 Insulation sheet removal ............116

9.4 Main PCB removal .....................117

9.5 INVERTER, PFC, FILTER, and

CAPACITOR PCB removal.................... 117

9.5.1 INVERTER PCB removal............ 118

9.5.2 PFC PCB removal....................... 118

9.5.3 FILTER PCB removal.................. 118

9.5.4 CAPACITOR PCB removal......... 119

9.6 FAN MOTOR removal................ 120

9.7 TOP PANEL removal .................120

9.8 PIPE COVER FRONT removal.. 120

9.9 RIGHT PANEL removal ............. 121

9.10 REACTOR removal....................121

9.11 THERMISTOR removal ............. 121

9.11.1 HEAT EXCHANGER (OUT)

THERMISTOR .......................................... 121

9.11.2 EXPANSION VALVE THERMISTOR
121

9.12 SOLENOID COIL removal......... 122

9.12.1 4WAY VALVE .............................. 122

9.12.2 INJECTION..................................122

9.13 EEV COIL removal .................... 122

9.13.1 MAIN............................................122

9.13.2 INJECTION..................................122

9.14 PRESSURE SENSOR removal. 122

9.15 COMPRESSOR removal........... 123

9.16 Precautions for exchange of

refrigerant-cycle-parts ........................... 125

10 Spare Parts..................................................................................................................126

11 Accessories.................................................................................................................127

11.1 DHW kit...................................... 127

11.2 Swimming pool kit...................... 127

11.3 2nd circuit kit.............................. 127

11.4 Room Sensor............................. 127

11.4.1 Room thermostat......................... 127

11.4.2 Remote control............................ 129

11.5 Boiler connection kit................... 130

11.6 Cooling kit.................................. 130

11.7 High flow rate circulation pump

kit............................................................130

11.8 Heat exchanger for swimming

pool.........................................................130

11.9 DHW tank .................................. 130

11.10 Balancing vessel........................ 130

11.11 External connect kit ................... 130

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 5

12 Related Documents .................................................................................................... 131

12.1 Quick-Start Procedure................131

12.2 Startup Checklist........................132

12.3 Settings Sheet............................134

12.4 Startup Data Sheet .................... 135

Heat Pump, Split System, Single Service, 3 phase

6 Maintenance Document 1394-1

1 Technical Characteristics

1.1 Specifications

Heating system operating limits

WATERSTAGE

112

WATERSTAGE

140

WATERSTAGE

160

Exterior temp mini/maxi °C -20/+35
Initial max heating water temperature

- Floor heating system °C 45

- Low temperature radiator °C 60
Flow min heating water temperature °C 8

1.2 Performance Data

1.2.1 Rated Performance

HEAT PUMP

WATERSTAGE

112

WATERSTAGE

140

WATERSTAGE

160

P

out

(kW) 11,2 14,00 16,00

Pin (kW) 2,51 3,22 3,72

+ 7°C/ + 35°C

-
HCF COP 4,46 4,35 4,30

P

out

(kW) 11,2 14,00 15,00

Pin (kW) 3,92 5,15 5,55

- 7°C/ + 35°C

-
HCF COP 2,86 2,72 2,70

P

out

(kW) 10,5 13,1 15,1

Pin (kW) 2,9 3,7 4,42

+ 7°C/ + 45°C

-
LT Radiators COP 3,62 3,54 3,42

P

out

(kW) 10,5 13,1 14,5

Pin (kW) 4,16 5,39 6,38

- 7°C/ + 45°C

-
LT Radiators COP 2,52 2,43 2,27

1.2.2 Maximum Stated Performance

HEAT PUMP

WATERSTAGE

112

WATERSTAGE

140

WATERSTAGE

160

P

out

(kW) 20,26 21,91 23,39

Pin (kW) 5,06 5,75 6,5

+ 7°C/ + 35°C

-
HCF COP 4,00 3,81 3,60

P

out

(kW) 17,09 18,67 20,20

Pin (kW) 5,04 5,67 6,43

+ 7°C/ + 45°C

-
LT Radiators COP 3,39 3,29 3,14

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 7

1.2.3 Performance Curves for Waterstage 112

1.2.4 Performance Curves for Waterstage 140

Heat Pump, Split System, Single Service, 3 phase

8 Maintenance Document 1394-1

1.2.5 Performance Curves for Waterstage 160

1.3 Hydraulic Characteristics

HEAT PUMP

WATERSTAGE

112

WATERSTAGE

140

WATERSTAGE

160

Connection diameter 1’’ – 25.4 mm (male)
Exchanger tank volume (L) 25
Expansion vessel volume (L) 8
Max pressure water circuit (Bar) 3
Max flow rate (l/h) 2400 3000 3400
Min flow rate (l/h) 1200 1500 1700
Min Delta T (°C) 4
Max Delta T (°C) 8

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1

9

1.4 Refrigeration Diagram

TH C: Compressor temperature sensor
TH

D

: Discharge temperature sensor

TH HM: Outdoor exchanger middle temperature sensor

TH

HO

: Outdoor exchanger outlet temperature sensor
TH O: Outdoor temperature sensor
TH

PI

: Exchanger temperature sensor

Water
heat
exchanger

Heat
exchanger

Compressor

with

Injection port

Compressor

with

Injection port

4-

Way

valve

Strainer

Strainer

Pressure sensor

Expansion Valve

Outdoor Unit

Hydraulic Unit

Pressure
check valve

Expansion vessel

Air bleeding valve

Circulation pump

Heating
unit
(Floor

heating,
radiator,
etc)

Supply/drain
port

Pressure safety
valve

Pressure
gauge

Hot water
column sensor

Hot water
return sensor

Injection

expansion valve

TH

HO

TH

O

TH

D

TH

PI

TH

C

Expansion valve

inlet thermistor

Strainer

Buffer
tank

Auxiliary heater

Accumulator

Injection circuit

S

olenoid valve

Solenoid valve

Injection

expansion valve

Injection

expansion valve

TH

HM

Heat Pump, Split System, Single Service, 3 phase

10 Maintenance Document 1394-1

2 Installation Rules

2.1 Heat Pump

2.1.1 Outdoor Units

In snowy areas: raise the outdoor unit by a height equal to the maximum height of snow cover plus 20cm.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 11

2.1.2 Hydraulic Unit

Minimum clearance dimensions must be provided
around the appliance as shown on the drawing, to
enable the machine to be serviced.

> Warning! <

Maintain a distance of at least 20 cm between

the unit and the ceiling to allow replacement of

heaters.

The Hydraulic Unit should be installed in such a way
that the distance between the module and the
outdoor unit is within the authorized range.

Beware of any flammable gas near the heat pump
during its installation, especially when it requires
brazing. In addition, the devices are not explosion­proof and therefore, they must not be installed in an
explosive atmosphere.

Heat Pump, Split System, Single Service, 3 phase

12 Maintenance Document 1394-1

2.2 Control Terminal

2.2.1 Room Unit

The room thermostat gives the user access to the
following basic functions:

• Adjustment of the room temperature setting by
simply turning the knob

• Selection of the heating mode

• Switching to comfort temperatures by simply

actuating the occupancy switch.

In addition, the room thermostat shows the user the
following information:

• the current temperature

• the heating mode

• the presence of a fault, when displaying the

symbol

2.2.2 User Interface

DHW function Select heating mode

Display information

Confirm setting

Activate cooling mode, off if
cooling option is not
available

Reset key

Navigation and
adjustment

Exit menu

Outdoor sensor:
2 x 0.5² cable
Service

plug (

BSB)

Select heating
mode

Room temperature setpoint control
knob

Occupancy key / day
ni

g

ht switch

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 13

Select heating mode

Auto mode

:

The temperature is controlled automatically:

- Heating mode according to time program

- Automatic summer/winter changeover

Continuous operating modes

or :

The temperature setpoint is maintained:

-

: Heating to the comfort setpoint

-

: Heating to the reduced setpoint
Heating with no time program, no summer/winter
automatic changeover

Protection mode

:
The installation is maintained at the frost protection
temperature, on condition that the heat pump supply
voltage is not interrupted.

Activate cooling mode (off if option

is not available):

Cooling mode
The "Cooling" mode adjusts the room temperature
according to the time program.
Cooling mode properties:

- Manual cooling mode

- Cooling mode according to time program

- Temperature setpoint according to "Comfort
setpoint cooling"

- Protective functions active

- Summer/winter auto changeover active

- Summer compensation

DHW Function

This key stops or allows the production of DHW and
activates the "boost" mode, which allows the nominal
temperature to be reached at any time, regardless of
the time program. Electric auxiliaries are activated if
necessary be to reach the DHW temperature
setpoint. In general they are not activated for daytime
boosting at the reduced temperature setpoint, as long
as the temperature remains below 43°C.
On: DHW is produced according to the time program
Off ---: no DHW is produced, the frost protection
function is active

To start the boost function keep the key pressed for
3 seconds. DHW production comes "on" again when
the nominal setpoint has been reached.

Adjust comfort setpoint temperature

The comfort setpoint is adjusted directly by turning
the knob, the value must be confirmed with the OK
key.

Adjustment of the reduced setpoint will be described
in detail in the "control settings" section.

Display information

The information key displays various items of
information.

Error message symbol.

This symbol appears whenever there is a fault in the
installation. Press the info key for details.

Symbol for maintenance or special operating

mode, press the info key for details.

RESET

Reset symbol.

Keep the key pressed less than 3s for a reset: this
resets all error messages. This function must not be
used in normal operating conditions.

Heat Pump, Split System, Single Service, 3 phase

14 Maintenance Document 1394-1

2.3 Electrical Connections

2.3.1 Installation Precautions

All machines in the ATW Split System Inverter range
are designed to operate at 3x400V 50Hz. Power
supplies must be compliant with NFC 15-100. The
power supply contract must be able to cover not only
the power of the unit but also the sum of powers of all
the devices likely to operate at the same time.

Protections will be of the omnipolar, D curve circuit
breaker type, with a contact opening distance of at
least 3 mm. Lines will be made of HO7 RNF cable or
similar. Provide a 300 mA maximum, differential
protection line-end in compliance with the current
standards. Under no circumstances (including during
startup periods) may the voltage across the unit drop
below 198V or rise above 264V. Do not use a power
outlet as the power supply.

> Warning ! <

Cable cross-sections and protection ratings

are given for information only. The installation

technician should always check that these
components are in line with the maximum

current ratings and the standards applied on

the installation premises

2.3.2 Electrical Connection Overview

Block diagram of electrical connections for a simple installation: one zone, no boiler backup or DH W

Two connections to the electrical panel:

• Heat pump general power supply on the outdoor
unit

• Electric auxiliary power supply on the Hydraulic
Unit

Interconnection between the Hydraulic Unit and the
outdoor unit.
Connection of the outdoor sensor and the room
thermostat.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 15

Hydraulic Unit Connection

Outdoor Unit Connection
The wiring of all Waterstage outdoor units is as follows:

Heat Pump, Split System, Single Service, 3 phase

16 Maintenance Document 1394-1

2.3.3 Hydraulic Unit Connection Diagram

* If the control device does not provide a potential-free contact, the contact must be relayed to create equivalent
wiring. In all cases, please refer to the instruction manuals for the external components (load limiting device,
power meters) to create the wiring.
** If several fault inputs are required, they are to be wired in series (they must be of the normally-open type).

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 17

3 Getting Started

3.1 Checks

3.1.1 Outdoor Unit

• Unit is secured to a stable surface

• Unit is raised in regions of regular snowfall

• Distances to potential obstacles or hazards are

maintained

• A condensate drain line is connected

3.1.2 Hydraulic Unit

• Unit is secured to a stable surface

• There is enough space for maintenance around the

unit

• There is free access to the unit

• There are no leaks

3.1.3 Hydraulic System

• Check the conformity of connections

• The use of flexible connections is recommended

• The system must be flushed

• Check the expansion vessel pre-charging (1 bar)

• Check the system's pressure and purge

• Check that the pump(s) is/are not locked

3.1.4 Electrical System

• Check the conformity of connections (per NFC

15100)

• Check that the lines are protected (two C curve
circuit breakers for "heat pump" and "auxiliaries",
lines must be separate)

• Differential protection is required (up to 300 mA).

• Check that connections are properly tightened

(flexible wire tips)

• Check the main power supply voltage and make
sure the polarity is correct

• Find out what type of contract has been subscribed
with the power company (load shedding)

3.1.5 Refrigeration System

• Make sure connections are compliant (diameters,
minimum and maximum lengths)

• Flare fittings must be properly made

• Use only HFC-specific tools and materials (POE oil,

etc.)

• For welding, use silver welding (40% min.) under
nitrogen flux

• Comply with the refrigerant handling legislation

• Conduct a nitrogen pressure leak test (~ 25 bar)

• Pump-down is required (preferably using a

vacuometer)

• Open both valves on the outdoor unit (first the liquid
valve then the gas valve)

• Supplement if necessary (according to the tables in
the instructions)

• Check fittings for tightness

• Check that pipes are correctly insulated and

fastened

Heat Pump, Split System, Single Service, 3 phase

18 Maintenance Document 1394-1

3.2 Settings

Depending on their associated functions, the control
settings are not accessed at the same level. There
are 4 levels of access:

U: end-user level
I: commissioning level (installer start-up)
S: engineer level (specialist)
C: OEM level (manufacturer)

To get to the level of access desired:

• Press OK: you are now on the main menu

• Press the info key for 3s (pressing continuously)

• To select the desired level, turn the control knob

• Press OK to confirm: this takes you back to the

main menu, with the rights associated to that
level. If you exit the main menu by returning to
the main page, the access level goes back to U
(end-user level)

To adjust the various settings:

• From the main menu, after obtaining the desired
level

• turn the control knob to scroll the menu

• When the desired menu appears, press OK to

confirm

• Turn the control knob to adjust the setting

• Press OK to confirm the setting

If not setting has been made for 8 minutes, the
screen automatically returns to the basic display.

3.3 Operating Modes

Heat pumps are controlled according to the heating
curve principle, i.e., the setpoint temperature of the
heating circuit water is adjusted as a function of the
outdoor temperature.

In heating mode, the choice of the heating curve best
suited to the machine's operating conditions can be
made automatically by the machine (auto-adapt) or
adjusted manually by the installation technician
(Settings 720, 721 and 726).

3.3.1 Manual Adjustment

During installation the heating curve must be defined
according to the emitters and the home's insulation.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 19

20

30

40

50

60

70

-20,0-15,0-10,0-5,00,05,010,015,020,0

Outdoor Temperature (°C)

Heating Flow Temperature (°C)

0,25

0,5

0,75

1

1,25

1,5

1,75

2

Heating Curves

Graph 1: Heating Curves

The heating curves shown above refer to a 20°C
room temperature setpoint.
The heating curve slope (setting 720) determines the
impact of outdoor temperature variations on heating
flow temperature variations. The steeper the slope,
the higher will be the increase in the heating circuit
water flow temperature which occurs when the
outdoor temperature increases slightly.

The heating curve offset (setting 721) changes the
flow temperature of all curves, without the slope
being modified.

The corrective actions in case of discomfort are listed
in the following table:

Feeling of discomfort Corrective action
By mild weather By cold weather Heating curve slope Offset

Too cold Too warm Decrease Increase
Too cold OK Decrease Increase
Too cold Too cold OK Increase
OK Too warm Decrease OK
OK OK OK OK
OK Too cold Increase OK
Too warm Too warm OK Decrease
Too warm OK Increase Decrease
Too warm Too cold Increase Decrease

Heat Pump, Split System, Single Service, 3 phase

20 Maintenance Document 1394-1

3.3.2 Auto Adapt Adjustment

When this function has been activated (setting 726)
the heating curve is automatically adjusted, and
therefore, there is no need to change the slope or
offset of the heating curve.
In order for the auto adapt feature to be operational:

• a room sensor must be connected

• the room influence parameter must be set

between 1 and 99 (setting 750) (depending on
the system, the room sensor may influence the
heating curve adjustment to a greater or lesser
extent)

• the room in which the room sensor is installed
must not contain any thermostatic valves. If it
does, these valves must be fully opened.

This function may cause some feeling of discomfort.
This is because in order for the function to be valid,
the system needs time to stabilize, which can take
more or less time depending on the weather
conditions. In general it takes at least a week, without
the room temperature setpoint being changed, for the
auto-adaptive control to be operational.

3.4 Control of Electric Backups

H 3

EX 4 EX 5 EX 6

Outdoor

Unit Fault

Load-shedding (EJP) Off-peak/peak

hours

External fault

(369)

(370)

0 V 230 V 230 V 0 V 230 V 0 V 230 V

EJP lock signal (l 2920)

"released"

"locked"

HEAT PUMP

OFF

ON ON OFF ON ON ON OFF

DHW auxiliary

ON (1)

ON OFF OFF ON OFF ON OFF

1st stage elec. auxiliary

ON (2)

ON OFF OFF ON ON ON OFF

2nd stage elec. auxiliary

ON (2)

ON OFF OFF ON ON ON OFF

Boiler backup

ON (2)

ON ON ON ON ON ON OFF

(1) subject to authorization by EX5
(2) provided the outdoor temperature is less than the setting on "2884 or 3700" (+2° from the beginning)

3.5 Domestic Hot Water

The heat pump may be connected to a combined
heating device (heat exhanger + electric auxiliaries)
for domestic hot water.
DHW handling requires a DHW kit. This kit includes a
3-way selection valve and a temperature sensor.

Warning: the maximum DHW temperature reached
with the heat pump does not exceed 60°C. Therefore,
the tank must be equipped with an electric auxiliary,
especially for legionella protection cycles.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 21

3.5.1 Principle of Operation

DHW production starts when the temperature inside
the tank is 7°C less than the setpoint temperature.
The setpoint can be either a "reduced" or a "nominal"
setpoint, depending on time program 4. During the
programmed time periods it is the nominal setpoint
which is active, and outside of these periods it is the
reduced setpoint which is active. Thus, to avoid
accidental DHW charge boosting outside of the
nominal time periods, we recommend having a
reduced setpoint as low as possible in order to avoid
the starting of DHW production outside the
programmed time period.

• T

reduced

: the temperature outside the time period.
This DHW temperature can be reached with the
heat pump alone. This requires that the
temperature does not exceed 35°C.

• T

nominal

: the temperature within time period 4,
which is approached first with the heat pump then
with the electric auxiliaries or the boiler backup (if
necessary).

Both of these temperatures are

adjustable (settings 1610 and 1612).

If the installation's power supply contract includes a
Peak/Off-Peak rate subscription, the heaters will be
controlled by the power rates and T

nominal

will be

reached only during Off-Peak Hours. This requires

that input E5 is wired as shown on Figure 1: Typical
Wiring of External

Devices.

If no special power supply contract has been
subscribed to, or if the DHW input is not wired, T

nominal

will be reached according to time program 4 / DHW.
The T

nominal

temperature can thus be reached at any
time, including during the day.
During the day, DHW has priority over heating,
however, DHW production is controlled by cycles
which regulate the times allocated to heating and to
DHW production in case of simultaneous demands.

A DHW boost function is available on the user
interface front panel. This DHW boost enables the
DHW to be heated up to T

nominal

at any time during the
day. The boost function is automatically cancelled
after a given time (which can be configured). The
boost function can be used only if DHW programming
has been performed. If the DHW is in nominal mode
(nominal T) the boost function is obviously
inoperative.
Legionella protection cycles can be programmed.

3.6 Test Mode

3.6.1 Sensor and Input Test Mode

LINE SENSOR INPUT WATERSTAGE

7730 B9 Outdoor temperature

7820 BX1 DHW temperature

7823 BX4 Heat pump flow temperature

7824 BX5 Heat pump return temperature

7830 BX21 (1) Circuit 1 flow T if 2 circuits (or sw pool)

7831 BX22 (1)

7832 BX21 (2)

7833 BX22 (2)

7841 H1 defrost information

7846 H2 swimming pool operation (if optional)

7855 H3 outdoor unit fault (370)

7914 EX4 Auxiliary load-shedding (EJP)

7915 EX5 Peak/Off-peak rates

7916 EX6 External fault (369)

Heat Pump, Split System, Single Service, 3 phase

22 Maintenance Document 1394-1

3.6.2 Output Test Mode

LINE OUTPUT WATERSTAGE

7700 QX23 (1) Circuit 1 heating pump or swimming pool selection valve

QX21 (1) Open mixing valve 1

QX22 (1) Close mixing valve 1

QX1

QX2 DHW heating circuiting pump (if connected)

QX3 Circuit 2 heating pump

QX4 DHW selection valve

QX5 Boiler selection valve (or heater 1)

QX6 Boiler (or heater 2)

QX23 (2)

QX21 (2)

QX22 (2)

QX7 DHW electrical auxiliary

7710 UX Output test UX %

7711 UX Voltage signal UX

7721 DO 1 Heating (or cooling) mode

7722 DO 2 Outdoor unit operation

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 23

4 Faults

4.1 Fault List

4.1.1 Hydraulic Unit Fault

Faults which occur on the Hydraulic Unit are shown
by the symbol

. Press the info key for details on the
cause of the fault. The following information is
displayed:

• Description of the error

• Location of the error (sensor or contact)

• Reset. Depending on its type, the fault can be

manually or automatically deleted:

 Manual delete: the text displayed when pressing

the info key shows "reset ?". Press OK once, the
yes flashes; press again to confirm deletion of the
fault.

 Faults whose deletion is automatic are

automatically reset.

• Heat pump op: shows whether or not the heat pump
operates despite the fault.

Reset

No.: Designation of error

Location

(connection)

Manual Auto

HP op

10: Outdoor sensor B9 No No Yes
33: Heat pump flow temp sensor error B21 No No Yes
44: Heat pump return temp sensor error B71 No No per diagram
50: DHW temp sensor B3 No No Yes
60: Room sensor 1 No No Yes
65: Room sensor 2 No No Yes
105: Maintenance message No No Yes
121: HC1 flow temp not reached No No Yes
122: HC2 flow temp not reached No No Yes
127: Legionella protection temp not reached No No Yes

369: External fault (safety component)

No

370: Outdoor unit fault* Yes Yes No

* A fault in the outdoor unit is indicated by LED located on the Hydraulic Unit interface board.

LED display

LED 2 (green) LED 1(red)

Fault description

1 Flash 1 Flash Communication error between Hydraulic Unit and Outdoor unit.
4 Flashes 1 Flash Heat pump capacity signal error (Open or short).
4 Flashes 2 Flashes Hydraulic Unit heat-exchange thermistor Error.
6 Flashes 3 Flashes Inverter error.
6 Flashes 4 Flashes Active filter error.

PFC error.
7 Flashes 1 Flash Discharge thermistor error.
7 Flashes 2 Flashes Compressor thermistor error.
7 Flashes 3 Flashes Heat-exchange thermistor (outlet) error.

Heat-exchange thermistor (intermediate) error.
7 Flashes 4 Flashes Outdoor thermistor error.
7 Flashes 7 Flashes Heat sink thermistor (inverter) error.

Heat sink thermistor (P.F.C.) error.
7 Flashes 8 Flashes Expansion valve thermistor error.
8 Flashes 4 Flashes Current sensor error.
8 Flashes 6 Flashes Pressure sensor error.

Pressure switch error.
9 Flashes 4 Flashes Current trip.
9 Flashes 5 Flashes Detection of compressor position error.

Compressor start up error.
9 Flashes 7 Flashes Outdoor unit fan motor error.
10 Flashes 1 Flash Discharge temperature protection.
10 Flashes 3 Flashes Compressor temperature protection.
10 Flashes 5 Flashes Low pressure abnormal.
Continuous flashing (1 sec ON / 1 sec OFF) Pump down operation.

Heat Pump, Split System, Single Service, 3 phase

24 Maintenance Document 1394-1

Faults external to the heat pump

Any safety device (e.g. thermostat pressure switch)
wired to input Ex6 (E20) allows external problems to
be reported and the heat pump to be immediately

stopped. For example, a safety thermostat on the
heating floor can be wired to input Ex6 (E20) to avoid
excessively high temperatures in the floor.

Figure 1: Typical Wiring of External Devices

If the control unit does not provide a potential-free
contact, the contact will have to be relayed to obtain
an equivalent wiring.

In any case, you should refer to the manuals for the
external devices (e.g. load shedders, electricity
meters) to perform the wiring.

…

Phase

Neutral

Heat pump connecting

blocks

… X5 X6 X7 X8

to inputs Ex4,

Ex5 or EX6

External

device

contact

(e.g. load-

shedder,

electricity

meter

)

Heat pump

H

y

draulic Unit

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 25

4.1.2 Outdoor Unit Fault

When the system is switched back on after a power
outage, the Hydraulic Unit may display fault 370 for a
few tens of seconds. This is not a serious problem. It
simply means that the outdoor unit is running its
tests. Once the tests have been completed, the fault
should disappear.

If it doesn't, if a fault has occurred on the outdoor unit
as indicated by the Hydraulic Unit, you must remove
the front (right-hand) facing from the outdoor unit.
Faults are coded by LED flashes. Error messages are
listed in the table below:

On the outdoor unit

When an error occurs:

- The diode “ERROR” (2) blinks
Press once on the switch “ENTER” (SW4)

- The “ERROR” (2) diode blinks several times depending on the error’s type

Location of switches and diodes on outdoor unit

LED display on the outdoor unit

LED display

Hydraulic Unit

Diagnosis Clear

Green Red

Outdoor unit

Off Serial reverse transfer error. 1

1 flash 1 flash

1 flash Serial forward transfer error. 2
4 flashes 1 flash 22 flashes Heat pump capacity signal error 4
4 flashes 2 flashes 22 flashes Hydraulic Unit Heat ex. Sensor error 5
6 flashes 3 flashes 18 flashes Inverter error. 20
6 flashes 4 flashes 19 flashes P.F.C. error. 27
7 flashes 1 flash 2 flashes Discharge thermistor error. 7
7 flashes 2 flashes 8 flashes Compressor thermistor error. 11

5 flashes Heat-exchange thermistor (intermediate) error. 12
7 flashes 3 flashes

4 flashes Heat-exchange thermistor (outlet) error. 8
7 flashes 4 flashes 7 flashes Outdoor temperature thermistor error. 9

9 flashes Heat sink thermistor (inverter) error. 10
7 flashes 7 flashes

10 flashes Heat sink thermistor (P.F.C.) error. 13
7 flashes 8 flashes 6 flashes Expansion valve thermistor error. 14
8 flashes 6 flashes 3 flashes Pressure sensor error. 24
9 flashes 4 flashes 13 flashes Current trip (permanent stoppage). 15

14 flashes Detection of compressor position error (permanent stoppage). 33
9 flashes 5 flashes

15 flashes Compressor start up error (permanent stoppage). 17

16 flashes Outdoor unit fan 1 motor error.
9 flashes 7 flashes

17 flashes Outdoor unit fan 2 motor error.

18

10 flashes 1 flash 11 flashes Discharge temperature protection (permanent stoppage). 22
10 flashes 3 flashes 12 flashes Compressor temperature protection (permanent stoppage). 25
10 flashes 5 flashes 20 flashes Low pressure abnormal. 26

Heat Pump, Split System, Single Service, 3 phase

26 Maintenance Document 1394-1

4.2 Outdoor Unit Clearing

This section describes the techniques which can be used to identify the failure.

4.2.1 Failures with Error Code

Clear 1: Serial reverse transfer error

Hydraulic Unit LED:

Green 1 flash / Red 1 flash

Outdoor Unit LED: Off

Probable causes:

• Misconnection.

• External cause.

• Main PCB failure.

Check:

1-1. Stop the system and start it again (disconnection time 1min):

Is the error still displayed?

YES NO

3. Check the power supply voltage:

- Check that an AC 198 – 264 V voltage exists between terminals 1 and 2,
L1 and N, L2 and N, L3 and N on the outdoor unit terminal block.

OK

4. Check the serial signal:

- Check the voltage between terminals 2 and 3 of the outdoor terminal block. The
voltage must fluctuate between AC 70 V and AC 130 V.

- If it doesn't, replace Main PCB.

OK

1-2. Check for external causes:

- Check the system's overall isolation.

- Check for any equipment generating
electromagnetic waves which interfere with the
communication between the hydraulic unit and the
outdoor unit.

2. Check the connections:

- Check the connection between the hydraulic
unit and the outdoor unit.

- Check the connections between the outdoor
unit main board and the active filter board.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 27

Clear 2: Serial forward transfer error

Hydraulic Unit LED:

Green 1 flash / Red 1 flash

Outdoor Unit LED: 1 flash

Probable causes:

• Misconnection.

• External cause.

• Interface PCB failure.

Check:

1-1. Stop the system and start it again (disconnection time 1min):

Is the error still displayed?

YES NO

3. Check the power supply voltage:

- Check that an AC 198 – 264 V voltage exists between terminals 1 and 2,
L1 and N, L2 and N, L3 and N on the outdoor unit terminal block.

OK

4. Check the serial signal:

- Check the voltage between terminals 2 and 3 of the outdoor terminal block. The
voltage must fluctuate between AC 70 V and AC 130 V.

- If it doesn't, replace Interface PCB.

OK

1-2. Check for external causes:

- Check the system's overall isolation.

- Check for any equipment generating
electromagnetic waves which interfere with the
communication between the hydraulic unit and the
outdoor unit.

2. Check the connections:

- Check the connection between the hydraulic
unit and the outdoor unit.

- Check the connections between the outdoor
unit main board and the active filter board.

Heat Pump, Split System, Single Service, 3 phase

28 Maintenance Document 1394-1

Clear 4: Heat pump capacity signal error

Hydraulic Unit LED:

Green 4 flashes / Red 1 flash

Outdoor Unit LED: 22 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Interface PCB failure.

Check:

1. Check connection interface PCB and Heat pump regulator PCB:

- See if the connector has been disconnected.

- See if the connection is correct.

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Check resistance value:

3 pin of CN22 – M < 10Ω

OK

3. Replace interface PCB:

If check point 1 and 2 do not improve the symptom, replace Interface PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 29

Clear 5: Hydraulic Unit Heat exchanger thermistor error

Hydraulic Unit LED:

Green 4 flashes / Red 2 flashes

Outdoor Unit LED: 22 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Interface PCB failure.

Check:

1. Check the sensor connection:

- See if the connector has been removed

- See if the connection is correct

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistance value.
Temperature (°C)

0 5 10 15 20 25 30 35 40 45 50

Resistance (kΩ)

176 134 103 80,3 62,9 49,7 39,6 31,7 25,6 20,8 17,1

- If the thermistor is faulty, replace it.

OK

3. Check the electronic board voltage:

- Make sure circuit diagram of hydraulic unit and check terminal voltage at thermistor

(DC5.0V)

- If there is no voltage, replace Interface PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

30 Maintenance Document 1394-1

Clear 7: Discharge thermistor error

Hydraulic Unit LED:

Green 7 flashes / Red 1 flash

Outdoor Unit LED: 2 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Main PCB failure.

Check:

1. Check the sensor connection:

- See if the connector has been disconnected.

- See if the connection is correct.

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value:

- Check the resistance value
Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 168 130 101 79 63 40 26,3 17,8

Temperature (°C) 60 70 80 90 100 120
Resistance (kΩ) 12,3 8,7 6,3 4,6 3,4 2

- If the thermistor is faulty, replace it.

OK

3. Check the electronic board voltage:

Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)

- If there is no voltage, replace Main PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 31

Clear 8: Heat-exchange thermistor (outlet) error :

Hydraulic Unit LED:

Green 7 flashes / Red 3 flashes

Outdoor Unit LED: 4 flashes

Probable causes:

• Misconnection.

• Sensor fault.

• Main PCB failure.

Check:

1. Check the sensor connection:

- See if the connector has been disconnected.

- See if the connection is correct.

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistancer value
Temperature (°C) -10 -5 0 10 15 20 25 30
Resistance (kΩ) 27,5 20,9 16,1 12,4 9,73 7,67 6,1 3,95

- If the thermistor is faulty, replace it.

3. Check the electronic board voltage:

- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor

(DC5.0V)

- If there is no voltage, replace Main PCB.

OK

OK

Heat Pump, Split System, Single Service, 3 phase

32 Maintenance Document 1394-1

Clear 9: Outdoor temperature thermistor error

Hydraulic Unit LED:

Green 7 flashes / Red 4 flashes

Outdoor Unit LED: 7 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Main PCB failure.

Check:

1. Check the sensor connection :

- See if the connector has been disconnected.

- See if the connection is correct.

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistance value.
Temperature (°C) -20 -10 -5 0 5 10 15 20 30 40 50 60 70
Resistance (kΩ) 115 62,3 46,6 35,2 26,9 20,7 16,1 12,6 7,97 5,18 3,45 2,36 1,65

- If the thermistor is faulty, replace it.

OK

3. Check the electronic board voltage:

- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)

- If there is no voltage, replace Main PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 33

Clear 10: Heat Sink Thermistor (inverter) error

Hydraulic Unit LED:

Green 7 flashes / Red 7 flashes

Outdoor Unit LED: 9 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Inverter PCB failure.

Check:

1. Check the sensor connection :

- See if the connector has been disconnected.

- See if the connection is correct.

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistance value.

Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 15,8 12,2 9,5 7,5 5,9 3,78 2,50 1,69

Temperature (°C) 60 70 80 90 100 120
Resistance (kΩ) 1,17 0,83 0,6 0,44 0,33 0,19

- If the thermistor is faulty, replace it.

OK

3. Check the electronic board voltage:

- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)

- If there is no voltage, replace Inverter PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

34 Maintenance Document 1394-1

Clear 11: Compressor thermistor error

Hydraulic Unit LED:

Green 7 flashes / Red 2 flashes

Outdoor Unit LED: 8 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Main PCB failure.

Check:

1. Check the sensor connection:

- See if the connector has been removed

- See if the connection is correct

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistance value.
Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 168 130 101 79 63 40 26,3 17,8

Temperature (°C) 60 70 80 90 100 120
Resistance (kΩ) 12,3 8,7 6,3 4,6 3,4 2

- If the thermistor is faulty, replace it.

OK

3. Check the electronic board voltage:

- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)

- If there is no voltage, replace Main PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 35

Clear 12: Heat-exchange thermistor (intermediate) error

Hydraulic Unit LED:

Green 7 flashes / Red 3 flashes

Outdoor Unit LED: 5 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Main PCB failure.

Check:

1. Check the sensor connection:

- See if the connector has been disconnected.

- See if the connection is correct.

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistance value
Temperature (°C) -10 -5 0 10 15 20 25 30
Resistance (kΩ) 27,5 20,9 16,1 12,4 9,73 7,67 6,10 3,95

- If the thermistor is faulty, replace it.

3. Check the electronic board voltage:

- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)

- If there is no voltage, replace Main PCB.

OK

OK

Heat Pump, Split System, Single Service, 3 phase

36 Maintenance Document 1394-1

Clear 13: Heat sink thermistor (P.F.C.) error

Hydraulic Unit LED:

Green 7 flashes / Red 7 flashes

Outdoor Unit LED: 10 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Main PCB failure.

Check:

1. Check the sensor connection:

- See if the connector has been removed

- See if the connection is correct

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistance value.
Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 15,8 12,2 9,5 7,5 5,9 3,78 2,50 1,69

Temperature (°C) 60 70 80 90 100

110

120

Resistance (kΩ)

1,17 0,83 0,60 0,44 0,33 0,25 0,19

- If the thermistor is faulty, replace it.

OK

3. Check the electronic board voltage:

- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)

- If there is no voltage, replace Main PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 37

Clear 14:

Expansion valve thermistor error

Hydraulic Unit LED:

Green 7 flashes / Red 8 flashes

Outdoor Unit LED:

6 flashes

Probable causes:

• Misconnection.

• Sensor failure.

• Main PCB failure.

Check:

1. Check the sensor connection:

- See if the connector has been removed

- See if the connection is correct

- Check for any damage on the sensor cable.

After solving the misconnection problem, switch the heat pump back on.

2. Remove the sensor and check its resistance value :

- Check the resistance value.
Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 168 130 101 79 63 40 26,3 17,8

Temperature (°C) 60 70 80 90 100 120
Resistance (kΩ) 12,3 8,7 6,3 4,6 3,4 2

- If the thermistor is faulty, replace it.

OK

3. Check the electronic board voltage:

- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)

- If there is no voltage, replace Main PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

38 Maintenance Document 1394-1

Clear 15: Current trip (permanent stoppage)

Hydraulic Unit LED:

Green 9 flashes / Red 4 flashes

Outdoor Unit LED: 13 flashes

Probable causes:

• Connection failure.

• Outdoor Heat Exchanger clogged.

• Outdoor Fan operation failure.

• Compressor failure.

• Inverter PCB failure.

Check:

1. Check connections condition in control unit:

- Check if the terminal connection is loose.

- Check if connector is removed.

- Check if connector is erroneous connection.

- Check if cable is open.

Upon correcting the removed connector or mis-wiring, reset the power.

OK

3. Check Outdoor Fan:

- Check Outdoor Fan Motor. (Refer to Clear 18)

If the Fan Motor is failure

,

replace it.

OK

4. Check Compressor:

Refer to “Service parts information 2 : Inverter compressor
If it is abnormal, replace compressor.

OK

2. Check Outdoor Heat Exchanger:

- Is there any obstructing the air flow route?

- Is there any clogging of outdoor unit Heat Exchanger?

If clogged, clear the clog.

5. Replace Inverter PCB:

If Check Point 1 ~ 4 do not improve the symptom, replace Inverter PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 39

Clear 17: Compressor startup error (permanent stoppage)

Hydraulic Unit LED:

Green 9 flashes / Red 5 flashes

Outdoor Unit LED: 15 flashes

Probable causes:

• Misconnection of the various electrical components.

• Inverter PCB failure.

• Compressor failure.

Check:

2. Check Compressor:

Refer to “Service parts information 2 : Inverter compressor
If it is abnormal, replace compressor.

3. Replace the electronic board :

- If steps 1 and 2 do not solve the problem, replace Inverter PCB.

OK

1. Check connections condition in control unit:

- Check if the terminal connection is loose.

- Check if connector is removed.

- Check if connector is erroneous connection.

- Check if cable is open.

Upon correcting the removed connector or mis-wiring, reset the power.

OK

Heat Pump, Split System, Single Service, 3 phase

40 Maintenance Document 1394-1

Clear 18: Fan motor error (permanent stoppage)

Hydraulic Unit LED:

Green 9 flashes / Red 7 flashes

Outdoor Unit LED: 16 flashes (fan 1), 17 flashes (fan 2)

Probable causes:

• Fan motor failure.

• Motor protection.

• Main PCB failure.

Check:

1. Check fan rotation:

- Switch off the heat pump and rotate the fan manually.

- If the fan or bearings are faulty, replace them.

2. Check the ambient temperature around the motor:

- Check excessively high temperature around the fan.

Wait until the temperature comes down again and switch the
fan back on.

3. Check the main board output voltage:

- On the outdoor unit, check the output voltage (DC) of the following connectors:

Terminals Voltage

1 (red)/ 3 (black) 250 400V

4 (white)/3 (black) 15 ±2V

If the voltage is incorrect, replace Main PCB.

OK

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 41

Clear 20: Inverter error

Hydraulic Unit LED:

Green 6 flashes / Red 3 flashes

Outdoor Unit LED: 18 flashes

Probable causes:

• Connection failure.

• Main PCB failure.

• Inverter PCB failure.

Check:

1. Check connections in control unit:

- Check if the terminal connection is loose.

- Check if connector is removed.

- Check if connector is erroneous connection.

- Check if cable is open.

Upon correcting the removed connector or mis-wiring, reset
the power.

2. Replace Main PCB and Inverter PCB:

If Check Point 1 do not improve the symptom, replace Main
PCB and Inverter PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

42 Maintenance Document 1394-1

Clear 22: Discharge temperature protection (permanent stoppage)

Hydraulic Unit LED:

Green 10 flashes / Red 1 flashes

Outdoor Unit LED: 11 flashes

Probable causes:

• Valve is close.

• EEV failure.

• Gas leak, less.

• Discharge Thermistor failure.

• Outdoor Fan operation failure.

• Outdoor Heat Exchanger clogged.

Check:

1. Check if gas valve is open:

If it is not open, open it and check the
operation.

2. Check EEV and Strainer:

Are EEV and Strainer open?

If EEV or Strainer is defective, replace it.

OK

Cooling mode

1. Check if liquid valve is open:

If it is not open, open it and check the
operation.

2. Check EEV and Strainer:

Are EEV and Strainer open?

If EEV or Strainer is defective, replace it.

OK

Heating mode

3. Check if gas leak or less gas:

Measure gas pressure, if there is a leak, correct it.

If recharging refrigerant, make sure to perform vacuuming and recharge the specified amount.

OK OK

4. Check Discharge Pipe Thermistor:

- Is it on the holder?

- Is there a cable pinched?

Check characteristics of thermistor (Refer to Clear 7), If defective, replace the thermistor

OK

5. Check Outdoor Heat Exchanger:

- Is there any obstructing the air flow route?

- Is there any clogging of outdoor unit Heat Exchanger?

If clogged, clear the clog.

OK

6. Check Outdoor Fan:

Check Outdoor Fan Motor. (Refer to Clear 18)

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 43

Clear 24: Pressure sensor error

Hydraulic Unit LED:

Green 8 flashes / Red 6 flashes

Outdoor Unit LED: 3 flashes

Probable causes:

• Connector connection failure.

• Pressure Sensor failure.

• Main PCB failure.

Check:

2. Check output voltage of Main PCB :

Check voltage of Main PCB (Measure at Main PCB side connector)

1 pin(Red) - 3 pin(Black) DC5V +/- 5%

If the voltage is not correct, replace Main PCB.

OK

3. Check output voltage of Pressure Sensor

Check voltage of Main PCB (Measure at Main PCB side connector)

2 pin(White) - 3 pIn(Black) Voltage is refer to the following graph.

If the voltage is not correct, replace Presure Sensor.

OK

1. Check connection of the Pressure Sensor:

- Check if the terminal connection is loose.

- Check if connector is removed.

- Check if connector is erroneous connection.

- Check if cable is open.

Upon correcting the removed connector or mis-wiring, reset the power.

Heat Pump, Split System, Single Service, 3 phase

44 Maintenance Document 1394-1

Clear 25: Compressor temperature protection (permanent stoppage)

Hydraulic Unit LED:

Green 10 flashes / Red 3 flashes

Outdoor Unit LED: 12 flashes

Probable causes:

• Valve is close.

• EEV failure.

• Gas leak, less.

• Compressor Thermistor failure.

• Outdoor Fan operation failure.

• Outdoor Heat Exchanger clogged.

Check:

1. Check if gas valve is open:

If it is not open, open it and check the
operation.

2. Check EEV and Strainer:

Are EEV and Strainer open?

If EEV or Strainer is defective, replace it.

OK

Cooling mode

1. Check if liquid valve is open:

If it is not open, open it and check the
operation.

2. Check EEV and Strainer:

Are EEV and Strainer open?

If EEV or Strainer is defective, replace it.

OK

Heating mode

3. Check if gas leak or less gas:

Measure gas pressure, if there is a leak, correct it.

If recharging refrigerant, make sure to perform vacuuming and recharge the specified amount.

OK OK

4. Check compressor temperature Thermistor:

- Is it on the holder?

- Is there a cable pinched?

Check characteristics of thermistor (Refer to Clear 11), If defective, replace the thermistor

OK

5. Check Outdoor Heat Exchanger:

- Is there any obstructing the air flow route?

- Is there any clogging of outdoor unit Heat Exchanger?

If clogged, clear the clog.

OK

6. Check Outdoor Fan:

Check Outdoor Fan Motor. (Refer to Clear 18)

OK

7. Replace Main PCB:

If Check Point 1 ~ 6 do not improve the
symptom, replace Main PCB.

OK

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 45

Clear 26: Low pressure abnormal

Hydraulic Unit LED:

Green 10 flashes / Red 5 flashes

Outdoor Unit LED: 20 flashes

Probable causes:

• Connector connection failure.

• Pressure Sensor failure.

• Main PCB failure.

• Gas leak, less.

Check:

2. Check output voltage of Main PCB :

Check voltage of Main PCB (Measure at Main PCB side connector)

1 pin(Red) - 3 pin(Black) DC5V +/- 5%

If the voltage is not correct, replace Main PCB.

OK

3. Check if gas leak or less gas

Measure Gas pressure, if there is a leak, correct it.

If recharging refrigerant, make sure to perform vacuuming and
recharge the specified amount.

OK

1. Check connection of the Pressure Sensor:

- Check if the terminal connection is loose.

- Check if connector is removed.

- Check if connector is erroneous connection.

- Check if cable is open.

Upon correcting the removed connector or mis-wiring, reset the power.

OK

4. Replace Pressure Sensor

If Check Point 1 ~ 3 do not improve the symptom, replace Pressure
Sensor.

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46 Maintenance Document 1394-1

Clear 27: P.F.C. error

Hydraulic Unit LED:

Green 6 flashes / Red 4 flashes

Outdoor Unit LED: 19 flashes

Probable causes:

• Connector connection failure.

• Main PCB failure.

• PFC PCB failure.

Check:

2. Check output voltage of Main PCB :

Check voltage of Main PCB (Measure at Main PCB side connector)

1 pin(brown) - 2 pin(Red) DC5V +/- 5%

If the voltage is not correct, replace Main PCB.

OK

3. Replace PFC PCB

If Check Point 1, 2 do not improve the symptom, replace PFC PCB.

OK

1. Check connections of between Main PCB and PFC PCB:

- Check if the terminal connection is loose.

- Check if connector is removed.

- Check if connector is erroneous connection.

- Check if cable is open.

Upon correcting the removed connector or mis-wiring, reset the power.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 47

Clear 33: Detection of compressor position error (permanent stoppage)

Hydraulic Unit LED:

Green 9 flashes / Red 5 flashes

Outdoor Unit LED: 14 flashes

Probable causes:

• Misconnection.

• Inverter PCB failure.

Check:

1. Check connections condition in control unit:

- Check if the terminal connection is loose.

- Check if connector is removed.

- Check if connector is erroneous connection.

- Check if cable is open.

Upon correcting the removed connector or mis-wiring, reset the power.

OK

2. Replace the electronic board :

- If steps 1 do not solve the problem, replace Inverter PCB.

Heat Pump, Split System, Single Service, 3 phase

48 Maintenance Document 1394-1

4.2.2 Failures With No Error Code

Clear 35: No voltage on Hydraulic Unit

Probable causes:

• Power supply fault.

• External causes.

• Faulty electrical components.

Check:

1. Check the installation :

- Is the circuit breaker cut off?

- Check the wiring.

2. Check for external causes on the Hydraulic Unit and outdoor unit (noise or voltage drop):

- Check for any other electrical device on the same electric circuit which might cause a drop in

voltage.

- Check for any current leaks.

- Check for any equipment generating electromagnetic waves which interfere with the

communication between the Hydraulic Unit and the outdoor unit.

3. Check the electrical components:

If all of these checks are unsuccessful, replace Interface PCB.

OK

OK

OK

- Check that a voltage between AC 198 and AC 264 V exists between terminals 1 and 2 on the

Hydraulic Unit terminal block.

NO

- Check Interface PCB for :

o either the fuse (F1).
o or the varistor (VA1). Fault: overvoltage - external causes - power supply to be

checked).

- Replace the faulty component (if the varistor is blown, the PCB must be replaced).

YES

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 49

Clear 36: No voltage on outdoor unit

Probable causes:

• Power supply fault.

• External cause.

• Faulty electrical components.

Check:

3. Check the electrical components:

2. Check for external causes on the Hydraulic Unit and outdoor unit (noise or voltage drop) :

- Check for any other electrical device on the same electric circuit which might cause a drop in

voltage.

- Check for any current leaks.

- Check for any equipment generating electromagnetic waves which interfere with the

communication between the Hydraulic Unit and the outdoor unit.

OK

OK

1. Check the installation

- Is the circuit breaker cut off?

- Check the wiring.

NO

If all of these checks are unsuccessful, replace Filter PCB, Main PCB,
Inverter PCB and PFC PCB.

OK

- Check that a voltage between AC 198 and AC 264 V exists between terminals 1 and 2 on the

Hydraulic Unit terminal block.

- Check Main PCB (power supply) for :

o either the fuse (F1, F3).
o or the varistor (VA1-VA5). Fault: overvoltage - external causes - power supply to be

checked).

- Replace the faulty component (if the varistor is blown, the PCB must be replaced).

YES

Heat Pump, Split System, Single Service, 3 phase

50 Maintenance Document 1394-1

Clear 38: No heat

Probable causes:

• Hydraulic Unit error.

• Outdoor unit error.

• Influence from the outdoor environment.

• Misconnections of connectors and cables.

• Refrigeration system fault (not enough gas, clogging, dirty filters).

Check:

2. Check the Hydraulic Unit :

- Is the pump operating?

- See if the exchanger is not clogged?

3. Check the outdoor unit:

- Is the fan rotating at high speed?

- Are there any objects blocking the air flow?

- Is the outdoor exchanger clogged?

- Are the valves open?

4. Check the configuration of the room:

- Is the heat pump power suited to the need?

5. Inspect the Hydraulic Unit and outdoor unit installation:

- Check the refrigeration connections (length, diameter)

6. Inspect the refrigeration circuit:

- See if the dehydrator is clogged (there should be no temperature variation
between the dehydrator input and output in normal operating conditions).

- Check the electronic expansion valve

- Check the compressor

1. The unit provides heating or cooling

No

Is the cooling kit
connected ?

Yes

Check the wiring of the cooling kit
control wire

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 51

Clear 39: Abnormal noise

Probable causes:

• Abnormal installation (outdoor)

• Fan failure

• Compressor failure.

Checks:

1. The noise comes from the outdoor unit:

- Is the unit stable?

- Is the protection screen properly mounted?

- Is the propeller broken or distorted?

- Has the propeller screw been lost?

- Is any object blocking the propeller rotation?

OK

- Check for any vibration noise caused by a
bolt.

- Check for any sound of contact with a pipe.

OK

- Is the compressor locked?

OK

Heat Pump, Split System, Single Service, 3 phase

52 Maintenance Document 1394-1

4.3 Sensor Values

4.3.1 Outdoor Unit Temperature Sensors

Outdoor Heat Exchanger (outlet), Outdoor Heat Exchanger (middle)

Temperature (°C) -10 -5 0 10 15 20 25 30
Resistance value (kΩ)

27,5

20,9 16,1 12,4 9,73 7,67 6,1 3,95

Outdoor Discharge Pipe / Compressor / Expansion valve inlet

Temperature (°C) 0 5 10 15 20 30 40 50 60
Resistance value (kΩ)

168

130 101 79 63 40 26,3 17,8 12,3

Temperature (°C) 70 80 90 100 120
Resistance value (kΩ)

8,7

6,3 4,6 3,4 2

Outdoor Temperature

Temperature (°C) -20 -10 -5 0 5 10 15 20 30
Resistance value (kΩ)

115

62,3 46,6 35,2 26,9 20,7 16,1 12,6 7,97

Temperature (°C) 40 50 60 70
Resistance value (kΩ)

5,18

3,45 2,36 1,65

Heat sink (INV), Heat sink (PFC)

Temperature (°C) 0 5 10 15 20 30 40 50 60
Resistance value (kΩ)

15,8

12,2 9,5 7,5 5,9 3,78 2,50 1,69 1,17

Temperature (°C) 70 80 90 100 110 120
Resistance value (kΩ)

0,83

0,60 0,44 0,33

0,25

0,19

4.3.2 Hydraulic Unit Temperature Sensors

Heat Exchanger (Condensing sensor)

Temperature (°C) 0 5 10 15 20 25 30 35 40 45 50
Resistance value (kΩ)

176

134 103 80,3 62,9 49,7 39,6 31,7 25,6

20,8 17,1

Outdoor sensor

Temperature (°C) -20 -15 -10 -5 0 5 10 15 20
Resistance value (kΩ)

7,60

5,85

4,60

3,60 2,85 2,30 1,85 1,50 1,20

Temperature (°C) 25 30 35 40 45
Resistance value (kΩ)

1

0,83 0,70 0,58 0,48

Heat pump flow and return sensor – DHW and heating zone 2 sensor – Swimming pool return sensor

Temperature (°C) -15 -10 -5 0 5 10 15 20 25
Resistance value (kΩ)

72,5

55 42 32,5 25 20 15,7 12,5 10

Temperature (°C) 30 35 40 45 50 55 60 65 70
Resistance value (kΩ)

8

6,5 5 4 3,5 3 2,5 2 1,7

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 53

4.4 Service parts information

4.4.1 Service parts information 1 : Compressor

Does not start up

Diagnosis method of compressor (if outdoor unit LED displays error, refer to Failures and clears)

Abnormal noise Stops soon after starting up

Is there open or loose
connection cable?

Check connection of
compressor, and winding
resistance (Refer to the next
page).

If there is no failure, the
defected of compressor is
considered (locked
compressor due to clogged
dirt or less oil).

Replace compressor

Is there open or loose
connection cable?

Is gas pipe valve open ?
(Low pressure is too low)

Check if refrigerant is leakin.
Recharge refrigerant.

Check if stainer is clogged
(Parts information 3)

Check inverter PCB, connection of compressor, and
winding resistance (refer to the next page).

If there is no failure, the defected of compressor is
considered (Compression part broken or valve
defective).

Replace compressor

Check if vibration noise by
loose bolt or contact noise of
piping is happening.

Defective compressor can
be considered (due to inside
dirt clogging or broken
component).

Replace compressor

Heat Pump, Split System, Single Service, 3 phase

54 Maintenance Document 1394-1

4.4.2 Service parts information 2 : Inverter compressor

Check point 1 : Check connection

Check terminal connection of compressor
(Loose or incorrect wiring)

Check connection of inverter PCB
(Loose or incorrect wiring)

Check point 2 : check winding resistance

Check winding resistance on each terminal

If the resistance value is 0Ω or infinite, replace compressor.

Check point 3 : replace inverter PCB
If check point 1 and 2 do not improve the symptom, replace Inverter PCB.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 55

4.4.3 Service parts information 3 : Outdoor unit electronic expansion
valve (EEV, EEV(INJ))

Check point 1 : Check connection

Check connection of connector
(Loose connector or open cable)

Check point 2 : Check coil of EEV

Remove connector, check each winding resistance of
coil.

Read wire Resistance value

White-Red
Yellow-Red
Orange-Red
Blue-Red

46Ω +/- 4Ω
at 20°C

If resistance value is abnormal, replace EEV.

Check point 3 : Check voltage from main PCB

Remove connector and check voltage (DC12V)

If it does not appear, replace Main PCB.

Check point 4 : Check noise at start up

Turn on power and check operation noise.

If an abnormal noise does not show, replace Main
PCB.

Check point 5 : Check opening and closing operation of valve

When valve is closed, it has a temp. (Add period)
difference between inlet and outlet.

If it is open, it has no temp. (Add period) difference
between inlet and outlet.

There is no refrigerant flow coming to EEV(INJ) while the liquid injection is inactive. Check whether the liquid
injection is active before executing check point 5 for EEV(INJ).

Check point 6 : Check stainer

Stainer normally does not have temperature difference between inlet and outlet as shown in 1, but if there is a
difference as shown in 2, there is a possibility of inside clogged. In this case, replace stainer.

Heat Pump, Split System, Single Service, 3 phase

56 Maintenance Document 1394-1

4.4.4 Service parts information 4 : Outdoor unit solenoid valve (SV)

Check point 1 : Check connections

Check connection of connector
(Loose connector or open cable)

Check point 2 : Check solenoid coil

Remove connector and check if coil is open
(normal resistance value of each coil : 1495+/­7%)

If resistance value is abnormal, replace
solenoid coil.

Check point 3 : Check voltage from main
PCB

Remove connector and check the voltage
(AC230V).

If the voltage does not appear, replace Main
PCB.

Check point 4 : check opening and closing operation valve

Depending on the injection activity, check if valve is operating normally.
(When valve opens, ther is no temperature difference between inlet and outlet)

• If the valve closes by removing the connector of the
valve which does not close, it is considered to be
Main PCB failure. Replace Main PCB.

• If it does not closeby removing connector, there is a
possibility of (1) clogging by dirt, or (2) deformation
by the heat at the time of solenoid valve installation.
In this case, replace solenoid valve.

SV

SOLENOID
COIL (INJ)

BLUE

BLUE

1 2

1 2

CN104

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 57

4.5 Operating Limits

HEAT PUMP

WATERSTAGE

112

WATERSTAGE

140

WATERSTAGE

160

Min/max OT in heat mode (°C)*** -20/35
Heating floor maximum water
temperature (°C)

45

LT radiator maximum water
temperature (°C)

60

Min/max OT in cooling mode(°C) 8/43

Cooling floor minimum water
temperature (°C)

18

Fan coil minimum water
temperature (°C)

8

Water circuit max pressure (Bar) 3
Maximum flow rate (l/h) 2400 3000 3400
Minimum flow rate (l/h) 1200 1500 1700
Refrigerant circ max pressure (kPa) 4,2
Min delta T (°C) 4
Max delta T (°C) 8
Outdoor unit Noise level 1 (dBA)* 53 55 56
Outdoor unit Noise level 5 (dBA)** 39 41 42

Outdoor unit air flow rate (m3/h)

3100 x 2

* Acoustic pressure level reading at 1m, in open field, on a reflecting plane.
** Acoustic pressure level reading at 5m, in open field, on a reflecting plane t.
*** When the outdoor temperature continuously exceeds 35°C, DHW heating is done by the water heater
heating element.

Available Hydraulic Pressures and Flow Rates

Heat Pump, Split System, Single Service, 3 phase

58 Maintenance Document 1394-1

5 Failures

5.1 Hydraulic, Electric and Refrigeration Systems

5.1.1 Hydraulic System

If the installation is fitted with a heating floor, the most
common failures are those listed below:

FAILURE CASES CONSEQUENCES SOLUTIONS

APPLIED
BY

Flow pressure too high clean filter or desludge Installer

1- Clogged filter*
or sludge in system

∆T too high (>7) clean filter or desludge Installer

Zero flow pressure

change pump with warranty if pump
is faulty

Service
station

current too high (rotor locked)

change pump with warranty if pump
is faulty

Service
station

zero current (winding cut off)

change pump with warranty if pump
is faulty

Service
station

2- Pump out of order

pump stuck release with a screwdriver

Installer

Pipe leak. Pipe
under warranty if
faulty

Service
station

3-Leak Low level in expansion vessel

On collector,
isolate heating
circuits to
determine which
heating circuit is
perforated.

Leak in heating
circuit. Floor
again.

Installer

On collector,
check heating
circuit flow/return
temps (infrared
thermometer)

Clear with test
pump

4- Clogged heating
circuit (crushed pipe)

Very high difference between floor
flow/return temp

If no clogged
heating circuit,
check for
crushing with
infrared camera

Call the installer's
or floor coverer's
responsibility into
question

Service
station

5- Misbalance

Very high difference between floor
flow/return temp

Rebalance Installer

6- Floor undersized or
charge losses too high

Very high difference between floor
flow/return temp

On collector,
check heating
circuit flow/return
temps (infrared
thermometer)

Call the installer's
responsibility into
question

Installer
or
Service
station

* Not required and not shown on the device.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 59

5.1.2 Electrical System

Outdoor Unit Overvoltage

Check for possible causes in the list below (this list is
not exhaustive):

• Problem with the compressor

• PFC board

• Inverter board

• Main board

• Faulty power relay

Steps to be followed before performing any work
on the Inverter module:

• First switch off the system using the circuit
breaker at the head of the line.

• Remove the unit cover and then remove the
Inverter module cover.

• Measure the voltage at the condenser terminals.
You should find a value of 5 Vdc or less.

Inspection of the Power Transistor Module (Inverter board)

Disconnect the compressor relay and the condenser
connection. Measure the resistance value at the
points shown on the illustration, and then compare
the values observed with those in the table.

Multimeter Resistor

1 MOhm
or more

Terminal block

Heat Pump, Split System, Single Service, 3 phase

60 Maintenance Document 1394-1

5.1.3 Refrigeration System

Unit produces no heat

The unit remains in continuous scanning mode.

Initial checks:

Check the settings
Are the data sent by the user interface received by the heat pump?

Hydraulic unit

electronic circuit

sending data to

outdoor unit ?

Compressor

running ?

Operating pressure

OK ?

4-way valve

switching ?

Expansion correct ?

Inspect refrigeration

lines (clogging)

Hydraulic unit electronic system faulty

Inspect PCB

Charge to balance

Problem solved?

Servicing complete

Valve coil faulty ?

Change

expansion valve

Change coil

Change 4-way valve

after testing

No

Yes

No

Yes

Yes

No

No

No

No

Yes

Yes

No

Yes

Yes

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 61

Outdoor unit does not defrost

• Is condensation drain properly discharged
(outdoor unit directly on the ground)?

• Are the auxiliaries powered?

• In boiler backup mode, is the boiler authorized?

• In very cold areas, a fusing resistance value is

recommended.

 Is the installation regularly subject to micro-

outages of power (frequent outages on the mains
power system may also cause defrosting
problems)?

 Is there a peak day clearing (EJP) outage on the

installation?

• Does the heat pump regularly switch to high
pressure safety mode?

If this occurs at low temperatures (< 5 °C), we
recommend checking that the water pump is
operating properly.

• Is the charge correct (refer to the
temperature/pressure curve)?

 Insufficient charging will result in frequent icing.
 Overcharging will result in frequently switching to

HP safety mode.

(If you still have doubts as to the charge, perform the
charging with an electronic scale).

• Outdoor unit defrosting is controlled by the
exchanger sensor and the controller board.

If the defrost sensor is not iced up while the rest of
the exchanger is, then:

⇒ Move the sensor between the exchanger blades

to a place where the exchanger is iced up.

⇒ If all these points have been checked, replace the

outdoor controller board.

Note:

Outdoor unit defrosting is controlled by the exchanger sensor and the controller board. If no frosting is observed
and no anomaly is otherwise noted, the sensor and board must be inspected and the faulty part will have to be
replaced.

Defrosting

a. Defrost beginning conditions

62’ < t < 240’

Start of heat mode

(Compressor ON)

Cumulative compressor operating time

Defrost

(No defrost for 10 min)

1st defrost Subsequent defrosts

240’ < t 17’ < t < 62’ 240’ < t 35’ < t < 240’

O Exch T

≤ -9°C

O Exch T

≤ -5°C

O Exch T

≤ -3°C

O Exch T

≤ -10°C

O Exch T

≤ -3°C

OT – O Exch T >5°C

O Exch T : outdoor unit exchanger temperature
OT : outdoor temperature
t : Cumulative compressor operating time

Heat Pump, Split System, Single Service, 3 phase

62 Maintenance Document 1394-1

b. Defrost ending conditions

With all models, defrosting stops if the exchanger
temperature is above 10 °C or if the defrosting time is
over 15 minutes).

Crankcase heater

When the outdoor exchanger temperature is below

-5°C and the heating mode has been stopped for
30 minutes, the compressor windings are powered
and maintain the compressor temperature.

When operation has started and the temperature
becomes higher than -3°C, heating stops.

5.2 Compressor Operating Checks

Using a multimeter set to mega ohm, check that the
resistance value across the windings is identical
irrespective of the phase (between U and V, V and
W, W and U). This value should be approx. 1 Ohm.

Check that resistance between each phase and the
earth is infinite. The result should be clear (you
should not see the displayed value increasing slowly
up to a value greater than the multimeter maximum
rating).

5.3 Refrigeration Circuit Leak Test

The new regulation requires annual leak testing of
installations with a refrigerant charge higher than 2kg.

Leak testing is to be performed with an approved
detector that has been appropriately calibrated.

5.4 Troubleshooting

The heat pump is not operating at all (no illuminated indicator):

 Are the power supply voltage and frequency

normal?

 Is the connection to mains correct?
 Have all the connectors been properly inserted?
 Are the fuses on the outdoor unit still operating?

If not, change the bad fuse(s).

 Is the connection between the outdoor unit and

the Hydraulic Unit correct? Do you read 230V AC
between terminals 1 and 2 of the Hydraulic Unit
terminal block?

 Do you read 230V AC at the transformer primary

on the Hydraulic Unit? If not, change the board.

 Is there any voltage on the transformer

secondary on the Hydraulic Unit? If not, check

the thermal fuse. If the fuse is good, the error
comes from the board.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 63

6 Control Settings

6.1 General

The settings described below are those which can be
modified by the user.
We wish to remind you that changing the settings
below may cause the heat pump to behave in an
undesirable way. A testing period should be
conducted before the permanent settings of the heat
pump are confirmed. This may require a number of
changes to be made by the installer.

There are 4 access levels:

U: end-user level
I: commissioning level (installer start-up)
S: engineer level (specialist)
C: OEM level (manufacturer) (not available)

6.2 Function Table

COMMAND

LINE

ACCESS

LEVEL

FUNCTION SETTING RANGE

FACTORY

SETTING

Time of day and date

1 U Hour/minutes 00:00…23:59
2 U Day/month 01.01…31.12
3 U Year 1900…2099
5 S Start of summertime 01.01…31.12 25.03
6 S End of summertime 01.01…31.12 25.10

Operator section

20 U Language English

22 S Info

Temporarily /
Permanent

Temporarily

26 S Operation lock Off/on Off
27 S Programming lock Off/on Off
28 I Direct adjustment Auto/confirm Confirm

40* I Used as

Room unit 1
Room unit 2
Room unit P
User interface 1
User interface 2
User interface P
Operating unit

Room unit 1

42* I Assignement device 1
44 I Operation HC2

Commonly with HC1

46 I Operation HCP

Commonly with HC1

48* I Operator occupancy button

None
Heating circuit 1
Heating circuit 2
Shared

None

54* I Readjustment room sensor
70 S Software version

Time prog heating circuit 1

500 U Preselection

Mon-Sun ¦ Mon-Fri ¦ Sat - Sun ¦
Mon ¦ Tue ¦ Wed ¦Thu ¦ Fri ¦ Sat
¦Sun

Mon-Sun

501 U 1st phase on 00:00…--:-- 6:00
502 U 1st phase off 00:00…--:-- 22:00
503 U 2nd phase on 00:00…--:-- --:-­504 U 2nd phase off 00:00…--:-- --:-­505 U 3rd phase on 00:00…--:-- --:-­506 U 3rd phase off 00:00…--:-- --:-­516 U Default values No/yes No

Time prog heating circuit 2

520 U Preselection

Mon-Sun ¦ Mon-Fri ¦ Sat - Sun ¦
Mon ¦ Tue ¦ Wed ¦Thu ¦ Fri ¦ Sat
¦Sun

Mon-Sun

521 U 1st phase on 00:00…--:-- 6:00
522 U 1st phase off 00:00…--:-- 22:00

Heat Pump, Split System, Single Service, 3 phase

64 Maintenance Document 1394-1

COMMAND

LINE

ACCESS

LEVEL

FUNCTION SETTING RANGE

FACTORY

SETTING

523 U 2nd phase on 00:00…--:-- --:-­524 U 2nd phase off 00:00…--:-- --:-­525 U 3rd phase on 00:00…--:-- --:-­526 U 3rd phase off 00:00…--:-- --:-­536 U Default values No/yes No

Time program 4 / DHW

560 U Preselection

Mon-Sun ¦ Mon-Fri ¦ Sat - Sun ¦
Mon ¦ Tue ¦ Wed ¦Thu ¦ Fri ¦ Sat
¦Sun

Mon-Sun

561 U 1st phase on 00:00…--:-- 00:00
562 U 1st phase off 00:00…--:-- 05:00
563 U 2nd phase on 00:00…--:-- --:-­564 U 2nd phase off 00:00…--:-- --:-­565 U 3rd phase on 00:00…--:-- --:-­566 U 3rd phase off 00:00…--:-- --:-­576 U Default values No/yes No

Time program 5 / Cooling circuit

600 U Preselection

Mon-Sun ¦ Mon-Fri ¦ Sat - Sun ¦
Mon ¦ Tue ¦ Wed ¦Thu ¦ Fri ¦ Sat
¦Sun

Mon-Sun

601 U 1st phase on 00:00…--:-- 8:00
602 U 1st phase off 00:00…--:-- 20:00
603 U 2nd phase on 00:00…--:-- --:-­604 U 2nd phase off 00:00…--:-- --:-­605 U 3rd phase on 00:00…--:-- --:-­606 U 3rd phase off 00:00…--:-- --:-­616 U Default values No/yes No

Holidays heating circuit 1

641 U Preselection Period 1…8 Period 1
642 U Start 01.01…31.12
643 U End 01.01…31.12
648 U Operating level

Frost protection ¦ Reduced Frost protection

Holidays heating circuit 2

651 U Preselection Period 1…8 Period 1
652 U Start 01.01…31.12
653 U End 01.01…31.12
658 U Operating level

Frost protection ¦ Reduced Frost protection

Heating circuit 1

710 U Comfort heating setpoint

Reduced temp to
35°C

20°C

712 U Reduced setpoint 18°C
714 U Frost protection setpoint

4°C to Reduced
temp

8°C

716 S Comfort setpoint max 20°C…35°C 28°C
720 I Heating curve slope 0,1…4 0,5
721 I Heating curve displacement -4,5°C…4,5°C 0°C
726 I Heating curve adaptation Off, on Off
730 I Summer/winter heating limit 8°C…30°C 18°C
732 S 24-Hour heating limit -10°C…10°C -3°C

740 S

Flow temp setpoint min (for fan
convectors)

8°C… 95°C 8°C

741 S Flow temp setpoint max 8°C… 95°C 55°C
Floor heating system = 50 °C / Higher temperature radiator = 65 °C
750 S Room influence 1%...100% 20%
790 S Optimum start control max 0…360min 120 min
791 S Optimum stop control max 0…360min 120 min
800 S Reduced setpoint increase start -30°C…10°C --­801 S Reduced setpoint increase end -30°C…10°C -5°C
830 S Mixing valve boost 0…50°C 0

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 65

COMMAND

LINE

ACCESS

LEVEL

FUNCTION SETTING RANGE

FACTORY

SETTING

834 S Actuator running time 30…873s 240s
850 I Floor curing function 0…5 Off
851 I Floor curing setpoint manually 0°C…95°C 25°C
856 I Floor curing day current 0…32
857 I Floor curing days completed 0…32
900 S Optg mode changeover

Protection mode

Cooling circuit 1

901 U Operating mode

Off … automatic

Off

902 U Comfort cooling setpoint 17…40 24°C

907 U Release

24h/day
Heating circuit time pgm
Time program 5

Time program 5

908 I Flow temp setp at OT 25°C 6…35°C 20°C
909 I Flow temp setp at OT 35°C 6…35°C 16°C
912 I Cooling limit at OT 8…35°C 24°C
913 S Lock time after end of heating 8…100h 24h
918 S Summer comp start at OT 20…50°C 26°C
919 S Summer comp end at OT 20…50°C 40°C
920 S Summer comp setp increase 1…10°C 4°C
923 S Flow temp setp min at OT 25°C 6…35°C 18°C
924 S Flow temp setp min at OT 35°C 6…35°C 18°C
928 S Room influence 1…100% 80%
932 S Room temperature limitation 0,5…4°C 0,5°C
938 S Mixing valve decrease 0…20°C 0°C
941 S Actuator running time 30…873s 240s

945 S Mixing valve in heating mode

Control
Open

Control

946 S Lock time dewpoint limiter 10…600min 60min
947 S Flow temp setp incr hygro 1…20°C 10°C
948 S Flow setp incr start at r.h. 0…100% 60%
950 S Flow temp diff. dewpoint 0…5°C 2°C

963 S With prim contr/system pump

No
Yes

No

969 S Optg mode changeover

None ; Off ; Automatic

Off

Heating circuit 2

1010 U Comfort heating setpoint

Reduced temp to
35°C

20°C

1012 U Reduced setpoint 18°C
1014 U Frost protection setpoint

4°C to Reduced
temp

8°C

1016 S Comfort setpoint max 20…35°C 28°C
1020 I Heating curve slope 0,1…4 0,5
1021 I Heating curve displacement

-4,5°C…4,5°C

0°C
1026 S Heating curve adaptation Off, on Off
1030 I Summer/winter heating limit 8°C…30°C 18°C
1032 S 24-Hour heating limit -10°C…10°C -3°C

1040 S

Flow temp setpoint min (for fan
convectors)

8°C… 95°C 8°C

1041 S Flow temp setpoint max 8°C… 95°C 55°C
Floor heating system = 50 °C / Higher temperature radiator = 65 °C
1050 S Room influence 1%...100% 20%
1090 S Optimum start control max 0…360min 120 min
1091 S Optimum stop control max 0…360min 120 min
1100 S Reduced setpoint increase start -30…10°C --­1101 S Reduced setpoint increase end -30…10°C -5°C
1130 S Mixing valve boost 0…50°C 0°C
1134 S Actuator running time 30…873s 240s
1150 I Floor curing function 0…5 0
1151 I Floor curing setpoint manually 0°C…95°C 25°C

Heat Pump, Split System, Single Service, 3 phase

66 Maintenance Document 1394-1

COMMAND

LINE

ACCESS

LEVEL

FUNCTION SETTING RANGE

FACTORY

SETTING

1156 I Floor curing day current 0…32
1157 I Floor curing days completed 0…32
1200 S Optg mode changeover

Protection mode

Domestic hot water

1610 U Nominal setpoint Thc…65°C 50°C
1612 U Reduced setpoint 8°C….Thc 25°C

1620 I Release

24h/day
Heating circ time pgms
Time program 4/DHW
Off-peak rate
4: Time pgm 4/DHW or
Off-peak rate

Time program
4/DHW

1640 I Legionella function

Off
Periodic
Fixed day in week

Off

1641 I Legionella funct periodically 1 to 7 7
1642 I Legionella funct weekday Mon,…Sun Saturday
1644 I Legionella funct time 00:00…23:50 --:-­1645 I Legionella funct setpoint 55°C…95°C 65°C
1646 I Legionella funct duration 10min…360min 30
1647 I Legionella funct circ pump On/off On

1660 I Circulation pump release

Time program 3/HCP
DHW release
Time program 4/DHW

DHW release

Swimming pool

2056 U Setpoint source heating 8…80 22

Heat pump

2844 S Switch-off temp max 8°C… 100°C 55°C
Floor heating system = 55 °C / Higher temperature radiator = 65 °C
2882 S Release integr electric flow 0… 500°Cmin 100°Cmin
2884 S Release el flow at OT -30°C…30°C 2°C
2910 S Release above OT ---/-30°C…30°C --­2920 S With electrical utility dock Lock/release Released

Supplementary source

3700 S Release below outside temp -50…50°C 2°C
3705 S Overrun time 0...120min 20
3720 S Switching integral 0… 500°Cmin 100°Cmin

DHW storage tank

5020 S Flow setpoint boost 0…30°C 5°C
5024 S Switching differential 0…20°C 7°C
5030 S Charging time limitation 10…600min 90 min

5060 S El imm heater optg mode

Substitution
Summer
Always
Cooling mode

Substitution

5061 S Electric immersion heater release

24h/day
DHW release
Time program 4/DHW

DHW release

Configuration

5700 I Preselection 1 to 12 1

5711 S Cooling circuit 1

Off
4-pipe system
2-pipe system

Off

5870 S Combi storage tank No/yes No

5987 S Cont type input EX4

Normally-closed contact
(NC)
Normally-opened contact
(NO)

NO

5989 S Cont type input EX5

Normally-closed contact
(NC)
Normally-opened contact
(NO)

NC

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 67

COMMAND

LINE

ACCESS

LEVEL

FUNCTION SETTING RANGE

FACTORY

SETTING

6046 I Function Input H2

HC+DHW op mode
change
HC op mode change
HC1 op mode change
HC2 op mode change
Error/alarm msg
Dewpoint monitoring
Pool release

Dewpoint

monitoring

6047 I Contact type H2

Normally closed
Normally open

Normally open
6048 S Function value Contact H2 0…130°C 45°C

6100 S Readjustm outside sensor -3…3°C 0°C
6120 S Frost protection for the plant On/off On
6205 S Reset to default parameters No/yes No
6220 S Software version 0…99 0

Errors

6711 U Reset HP No/yes No
6740 S Flow temp 1 alarm 10…240min --­6741 S Flow temp 2 alarm 10…240min --­6745 S DHW charging alarm 1…48h --­6746 S Flow temp cooling 1 alarm 10…240min --­6800 S History 1 Date/time/code
6802 S History 2 Date/time/code
6804 S History 3 Date/time/code
6806 S History 4 Date/time/code
6808 S History 5 Date/time/code
6810 S History 6 Date/time/code
6812 S History 7 Date/time/code
6814 S History 8 Date/time/code
6816 S History 9 Date/time/code
6818 S History 10 Date/time/code

Service / special operation

7070 S HP interval 1..240 months --­7071 S HP time since maint 0..240 months 0
7072 S Max starts compr1/hrs run 0,1…12 --­7073 S Cur starts compr1/hrs run 0…12 0
7076 S Diff condens max/week 1…250 --­7077 S Cur diff condens max/week 0…250 0
7078 S Diff condens min/week 1…250 --­7079 S Cur diff condens min/week 0…250 0
7090 S DHW storage tank interval 1…240 --­7091 S DHW stor tank since maint 0…240 0
7141 U Emergency operation On/off Off
7142 S Emergency operation function type Manual/auto Manual
7150 I Simulation outside temp -50…50°C --­7181 I Phone no. responsibility 1 0…255
7183 I Phone no. responsibility 2 0…255

Input / output test

7700 I Relay test

No test
All OFF
Relay output QX23 module 1
Relay output QX21 module 1
Relay output QX22 module 1
Relay output QX1
Relay output QX2
Relay output QX3
Relay output QX4
Relay output QX5
Relay output QX6
Relay output QX23 module 2
Relay output QX21 module 2
Relay output QX22 module 2
Relay output QX7

No test

7710 I Output test UX 0…100% ---%

Heat Pump, Split System, Single Service, 3 phase

68 Maintenance Document 1394-1

COMMAND

LINE

ACCESS

LEVEL

FUNCTION SETTING RANGE

FACTORY

SETTING

7711 I Voltage signal UX 0…10volt 0 volt

7720 I Digital output test

No test
All OFF
Digital output DO1
Digital output DO2

No test

7721 I Digital output DO1

Cooling mode
Heating mode

Heating mode

7722 I Digital output DO2 On/off Off
7730 I Outside temp B9 -50…50°C 0°C
7820 I Sensor temp BX1 -28…350°C 0°C
7823 I Sensor temp BX4 -28…350°C 0°C
7824 I Sensor temp BX5 -28…350°C 0°C
7830 I Sensor temp BX21 module 1 -28…350°C 0°C
7831 I Sensor temp BX22 module 1 -28…350°C 0°C
7832 I Sensor temp BX21 module 2 -28…350°C 0°C
7833 I Sensor temp BX22 module 2 -28…350°C 0°C
7841 I Contact state H1 Open/closed Open
7846 I Contact state H2 Open/closed Open
7855 I Contact state H3 Open/closed Open
7914 I Input Ex4 0/230V 0
7915 I Input Ex5 0/230V 0
7916 I Input Ex6 0/230V 0

State of plant

8000 I State heating circuit 1 0
8001 I State heating circuit 2 0
8003 I State DHW 0
8004 I State cooling circuit 1 0
8006 I State heat pump 0
8011 I State swimming pool 0
8022 I State supplementary source 0
8050 I History 1 Date/time/code
8052 I History 2 Date/time/code
8054 I History 3 Date/time/code
8056 I History 4 Date/time/code
8058 I History 5 Date/time/code
8060 I History 6 Date/time/code
8062 I History 7 Date/time/code
8064 I History 8 Date/time/code
8066 I History 9 Date/time/code
8068 I History 10 Date/time/code

Diagnostics heat source

8402 I El imm heater 1 flow Off/on Off
8403 I El imm heater 2 flow Off/on Off
8406 I Condenser pump Off/on Off
8410 U Return temp HP 0…140°C 0°C
8411 U Setpoint HP 0…140°C 0°C
8412 U Flow temp HP 0…140°C 0°C
8413 U Compressor modulation 0…100% 0%
8425 I Temp diff condenser -50…140°C 0°C
8454 S Locking time HP 0…2730h 00:00:00
8455 S Counter number of locks HP 0…65535 0
8456 S Hours run el flow 0…2730h 00:00:00
8457 S Start counter el flow 0…65535 0

Diagnostics consumers

8700 U Outside temperature -50…50°C 0°C
8701 U Outside temp min -50…50°C 50°C
8702 U Outside temp max -50…50°C -50°C
8703 I Outside temp attenuated -50…50°C 0°C
8704 I Outside temperature composite -50…50°C 0°C

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1

96

COMMAND

LINE

ACCESS

LEVEL

FUNCTION SETTING RANGE

FACTORY

SETTING

8730 I heating circuit pump 1 Off/on 0
8731 I Heating circ mix valve 1 open Off/on 0
8732 I Heat circ mix valve I close Off/on 0

C°02 C°05…0 1 pmet mooR U 0478

8741 U Room setpoint 1 4…35°C 20°C

C°05 C°041…0 1 pmet wolF U 3478
8744 U Flow temp setpoint 1 0…140°C 50°C
8756 U Flow temperature cooling 1 0…140°C 0°C
8757 U Flow temperature setpoint cooling 1 0…140°C 0°C
8760 I Heating circuit pump 2 Off/on 0
8761 I Heat circ mix valve 2 open Off/on 0
8762 I Heat circ mix valve 2 close Off/on 0
8770 U Room temp 2 0…50°C 20°C
8771 U C°02 C°53…4 2 tnioptes mooR
8773 U Flow temp 2 0…140°C 50°C
8774 U Flow temp setpoint 2 0…140°C 50°C
8820 I DHW pump Off/on 0
8821 I Electric immersion heater DHW Off/on 0
8830 U DHW temp 1 0…140°C 0°C
8831 U DHW temp setpoint 5…80°C 50°C
8840 S Hours run DHW pump 0…2730h 00:00:00
8841 S Start counter DHW pump 0…2730h 0
8842 S Hours run el DHW 0…2730h 00:00:00
8843 S Start counter el DHW 0…65535 0
8900 U Swimming pool temp 0…140°C 0°C
8901 U Swimming pool setpoint 0…80°C 22°C
8950 I Common flow temp 0…140°C 0°C
8951 I Common flow temperature setpoint 0…140°C 0°C
8957 I Common flow setp refrig 0…140°C 0°C
9031 I Relay output QX1 Off/on 0
9032 I Relay output QX2 Off/on 0
9033 I Relay output QX3 Off/on 0
9034 I Relay output QX4 Off/on 0
9035 I Relay output QX5 Off/on 0
9036 I Relay output QX6 Off/on 0
9037 I Relay output QX7 Off/on 0
9050 I Relay output QX21 module 1 Off/on 0
9051 I Relay output QX22 module 1 Off/on 0
9052 I Relay output QX23 module 1 Off/on 0
9053 I Relay output QX21 module 2 Off/on 0
9054 I Relay output QX22 module 2 Off/on 0
9055 I Relay output QX23 module 2 Off/on 0

Heat Pump, Split System, Single Service, 3 phase

70

tnemucoD ecnanetniaM 1394-1

6 End of summertime

NOTE: Summer time/winter time change
Dates have been set for changing to summer time
or to winter time. The time changes automatically
from 2am (winter time) to 3am (summer time) or
from 3am (summer time) to 2am (winter time) on
the first Sunday following the respective date.

6.3 Adjustment Function Details

6.3.1 Date and Time Functions

The controller has an annual clock which contains the
time, the day of the week and the date.

In order for the function to operate, the time and date
must be set properly on the clock.

LINE NO. PROGRAMMING LINE

1 Hour/minutes
2 Day/month
3 Year
5 Start of summertime

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 71

6.3.2 User Interface Functions

LINE NO. PROGRAMMING LINE

20 Language
22 Info
26 Operation lock
27 Programming lock
28 Direct adjustment

Info (22):

• Temporary:
After pressing the Info key, the information display
returns to the basic "predefined" display after 8
minutes or when pressing the operating mode key.

• Permanent:
After pressing the Info key, the information display
returns to the "new" standard display after a
maximum of 8 minutes. The last selected information
value is shown in the new basic display.

Operation lock (26):

If the operating lock is activated, the following control

elements can no longer be adjusted:
Heating circuit mode, DHW mode, room temp comfort
setpoint (knob), occupancy key.

Programming lock (27):

If the programming lock is activated, the setting

values are displayed but may no longer be changed.

• Temporary Suspension of Programming
The programming lock can be temporarily
deactivated at programming level. To do this,
simultaneously press the OK and ESC keys for at
least 3 seconds. The temporary suspension of the
programming lock remains in effect until you exit the
programming.

• Permanent Suspension of Programming
First perform a temporary suspension, then cancel
"Programming lock" on line 27.

Direct adjustment (28):

• Automatic Save
Correction of the setpoint with the knob is adopted
without a particular confirmation (timeout) or by
pressing the OK key.

• Confirm save
Correction of the setpoint with the knob will be
adopted only after pressing the OK key.

Used as (40):

LINE NO. PROGRAMMING LINE

40*

Used as

(Room unit 1 / Room unit 2 / Room unit P / Operator unit1 ¦ Operator
unit 2 ¦ Operator unit P ¦ Service unit)

* applies only to room central units C75

This line allows adjusting the use of the user
interface. According to use, other settings will be
required under "Heating circuit assignment". If
several user interfaces are used, operation of each
device can be defined selectively.
o If several user interfaces are used, each device
address may be used only once.
o The user interface mounted to the Hydraulic
Units is set in the factory as operating device 1 (line

40) which has an effect on all heating circuits (line

42) and can be configured only on command lines
44, 46, 48.

Depending on how the device is used (line 40), the
following adjustments can be made for assignment
to the heating circuits with the following effects:

Heat Pump, Split System, Single Service, 3 phase

72 Maintenance Document 1394-1

Programming line

40 42 44 46 48 54
Room unit 1 Heating circuit 1 X

Heating circuits 1 and 2 X X X

Heating circuits 1 and P X X X
All HCs
Room unit 2
Room unit P
Operator unit 1 Heating circuit 1
Heating circuits 1 and 2 X X
Heating circuits 1 and P X X
All HCs X X X
Operator unit 2
Operator unit P
Operating unit

• Room unit 1
The user interface controls the heating circuits
which are authorized on line 42 "Room unit 1
assignment" and which have been activated
accordingly in the base unit.

• Room unit 2
The user interface only controls heating circuit 2.

• User interface / operating unit
The user interface controls the heating circuits that
have been activated in the base unit.

Note:

with this setting, no room temperature is

saved or transmitted by the user interface.

Heating Circuit Assignment

LINE NO. PROGRAMMING LINE

42* Assignment device 1
44 Operation HC2
46 Operation HCP
48* Operator occupancy button
54* Readjustment room sensor
70 Software version

* applies only to room central units C75

Unit 1 assignment

As unit 1 (setting 40), action of the respective user
interface can be assigned either to heating circuit 1 or
to both heating circuits. The second option is
necessary particularly when there are 2 heating
circuits and only one room unit.

Operation HC2

Depending on the setting of line 40, the operating
action (operating mode key or knob) can be defined
either on room unit 1, on the user interface or on the
operating unit for heating circuit 2.

• Commonly with HC1
The control for heating circuits 1 and 2 is shared.

• Independently
Action of the control is called on the display whenever
use is made of the operating key or the knob.

Operation HCP

According to command line 40, the control action
(operating mode key or knob) can be defined either
on room unit 1, on the user interface, or on the
operating unit for heating circuit P.

• Commonly with HC1
The control for heating circuits 1 and 2 is shared.

• Independently
Changes in the operating mode or adjustment of the
nominal temperature setpoint must be made in the
programming.

Readjustment room sensor

The room sensor indication can be corrected.

Software version

The indication shows the current version of the user
interface.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 73

6.3.3 Time Program Functions (heating circuit 1 & 2, DHW, cooling)

Several control programs are available for the heating
circuits and the production of DHW. They are initiated
in "Automatic" mode and control the change in
temperature levels (and therefore the associated
setpoints, reduced and comfort) via the adjusted
changeover times.

Enter changeover times:

Changeover times can be adjusted in a combined
way, i.e., identical times for several days or distinct
times for certain days. Preselecting groups of days
(e.g., Mon...Fri and Sat...Sun) having the same
changeover times makes adjustment of the
changeover program considerably shorter.

Changeover Points

Line no.
HC1 HC2 4/DHW 5

Programming line

500 520 560 600 Preselection

(Mon-Sun / Mon-Fri / Sat – Sun / Mon...Sun)

501 521 561 601 1st phase On
502 522 562 602 1st phase Off
503 523 563 603 2nd phase On
504 524 564 604 2nd phase Off
505 525 565 605 3rd phase On
506 526 566 606 3rd phase Off

Standard Program

Line no. Programming line

516, 536, 576, 616 Default values

(No /Yes)

All time programs can be reset to factory settings.
Each time program has its own command line for this
reset action.

In this case, individual settings will be lost!

Heat Pump, Split System, Single Service, 3 phase

74 Maintenance Document 1394-1

Holidays:

Line no.
HC1 HC2

Programming line

642 652 Start
643 653 End
648 658 Operating level

The holiday program enables changing the heating
circuits over to a selected operating level according to
the date (calendar).

Important !

The holiday program can be used only in the
automatic mode.

6.3.4 Heating Circuit 1 & 2 Functions

Operating Mode

For heating circuits there are several functions
available which can be individually adjusted for each
heating circuit.

The programming lines for the 2nd heating circuit are
displayed only if an extension module has been
connected to the controller.

Operation of heating circuits 1 and 2 is directly
controlled via the operating mode key.

Setpoint Values

Line no.
HC1 HC2

Programming line

710 1010 Comfort heating setpoint
712 1012 Reduced setpoint
714 1014 Frost protection setpoint
716 1016 Comfort setpoint max

Room Temperature:

Room temperature can be set according to different
setpoint values. Depending on the selected mode,
these setpoints are activated and provide different
temperature levels in the rooms.

The ranges of configurable setpoints are defined by
their interdependencies, as shown in the graph
below.

Frost protection:

The protection mode automatically prevents an
excessively sharp drop in room temperature.

In this case the control adopts the frost protection
room setpoint.

Comfort setpoint

Reduced setpoint

Frost prot. setpoint

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 75

Heating Curve

Line no.
HC1 HC2

Programming line

720 1020 Heating curve slope
721 1021 Heating curve displacement
726 1026 Heating curve adaptation

Heating curve slope:

Based on the heating characteristic, the controller
computes the flow temperature setpoint which will be
used for controlling the flow temperature in
consideration of atmospheric conditions. Different
settings can be used to adapt the heating
characteristic so that the heating capacity, and
therefore the room temperature, will match the
individual needs.

The colder the outdoor temperature, the greater the
extent to which the slope will modify the flow
temperature. In other words, the slope should be
corrected if the room temperature shows a difference
when the outdoor temperature is low, but not when it
is high.

o Increase the setting:
The flow temperature is increased mainly when the
outdoor temperatures are low.
o Decrease the setting:
The flow temperature is lowered mainly when the
outdoor temperatures are low.

Warning:

The heating curve is adjusted in relation to a room
temperature setpoint of 20°C. If the room temperature
setpoint is modified, the flow temperature setpoint is
automatically recomputed. This will not modify the
setting and amounts to automatically adapting the
curve.

20

30

40

50

60

70

-20,0-15,0-10,0-5,00,05,010,015,020,0

Outdoor Temperature (°C)

Heating Flow Temperature (°C)

0,25

0,5

0,75

1

1,25

1,5

1,75

2

Heating Curves

Heat Pump, Split System, Single Service, 3 phase

76 Maintenance Document 1394-1

Heating curve displacement

The curve shift (offset) modifies the flow
temperature in a general and even manner over the
full range of outdoor temperature. In other words,
the shift should be corrected when the room
temperature is generally too high or too low.

Heating curve adaptation

Adaptation enables the controller to automatically
adapt the heating curve to the present conditions.
This correction may only be activated or
deactivated.
In the latter case, there is no need to correct the
slope and shift.

Information:

To ensure operation, the following requirements
must be met:

- A room sensor must be connected.

- The "room influence" parameter must be

set between 1 and 99.

- The reference room (where the room
sensor is installed) must not contain adjusted
thermostatic valves. If present in the room, these
valves must be fully open.

- Operation of this function requires an
adaptation period which can take more or less time
(approx. 1 week) depending on weather conditions
and on the stability of the room temperature
setpoint.

Eco Functions

Line no.
HC1 HC2

Programming line

730 1030 Summer/winter heating limit
732 1032 24-Hour heating limit

Summer/winter heating limit

The summer/winter heating limit switches the heating
on or off through the year according to the
temperature ratio. Changeover is performed
automatically when in automatic mode and thus
avoids the user having to turn the heating on or off.
Changing the input value makes the respective
annual periods (summer/winter) shorter or longer.

- If the value is increased:
Changing to winter operating mode is advanced,
changing to summer mode is delayed

- If the value is decreased:
Changing to winter mode is delayed; changing to
summer mode is advanced.

Information:

This function does not work in "Continuous Comfort
temperature" mode. (Sunlight)
The controller displays "ECO".
The outdoor temperature is attenuated to take the
building's dynamics into account.

Example:

Sum/win heating limit + 1°C
Sum/win heating limit
Sum/win heating limit - 1°C

Attenuated outdoor T

Days

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 77

24-Hour heating limit

The 24-hour heating limit is used to switch the
heating on and of in the course of the day, depending
on the outside temperature.This function is used
mainly during intermediate seasons (spring and fall)
to react rapidly in case of fluctuating temperatures.

Thus, in the following example the changeover
temperature will be 18°C, computed as follows:

Comfort heating setpoint (710) 22°C
24-Hour heating limit (732) -3°C
Changeover temperature (710 – 732)
Heating off

=19°C

Differential (Fixed) -1°C
Changeover temperature Heating on =18°C

Changing the input value makes the respective
heating periods shorter or longer.

- If the value is increased: changeover to
heating mode is advanced; changeover to ECO is
delayed.

- If the value is decreased: changeover to
heating mode is delayed; changeover to ECO is
advanced.

Information:

This function will not work in "Continuous Comfort
temperature" mode.
The display will show "ECO".
The outdoor temperature is attenuated to take the
building's thermal dynamics into account.

Flow temperature setpoint

Line no.
HC1 HC2

Programming line

740 1040 Flow temp setpoint min (for fan convectors)
741 1041 Flow temp setpoint max

This limitation allows to define a range for the orders
to start. When instructed to start the heating circuit
reaches the threshold, this record remains

permanently at the maximum or minimum, even if the
heat demand continues to increase or decrease.

Room Influence

Line no.
HC1 HC2

Programming line

750 1050 Room influence

Control types:

When using a room temperature sensor there are 3
different types of control to choose from.

SETTING CONTROL TYPE

- - - % Simple control according to outdoor conditions *

1...99 % Control according to outdoor conditions with room influence *
100 % Control according to room temperature only

* Requires the connection of an outdoor sensor

Simple control according to outdoor conditions

The flow temperature is computed via the heating
curve according to the averaged outdoor
temperature.
This type of control requires proper adjustment of the
heating curve, as the control does not take the room
temperature into account for this adjustment.

Control according to outdoor conditions with
room influence

The difference between the room temperature and
the setpoint value is measured and taken into
account for temperature control. This enables taking
into account possible heat inputs and ensures a more
even room temperature.

Heat Pump, Split System, Single Service, 3 phase

78 Maintenance Document 1394-1

The influence of the difference is defined as a
percentage. The better the installation in the
reference room (accurate room temperature, correct
installation location, etc.) the higher will be the value
that can be set.

Example:

Approx 60%: the reference room is appropriate
Approx 20 %: the reference room is inappropriate

Information:

Activation of the function requires taking into account
the following requirements:

- A room sensor must be connected.

- The "room influence" parameter must be set

between 1 and 99.

- The reference room (where the room sensor
is installed) must not contain adjusted thermostatic
valves. If present in the room, these valves must be
fully open.

Control according to room temperature only

The flow temperature is adjusted according to the
room temperature setpoint, the current room
temperature and its evolution. A slight increase in
room temperature, for example, causes an immediate
drop in the flow temperature.

Information:

Activation of the function requires taking into account
the following requirements:

- A room sensor must be connected.

- The "room influence" parameter must be set

to 100%.
The reference room (where the room sensor is
installed) must not contain adjusted thermostatic
valves. If present in the room, these valves must be
fully open.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 79

Optimisation at switch-on and switch-off

Line no.
HC1 HC2

Programming line

790 1090 Optimum start control max
791 1091 Optimum stop control max

Optimum start control max

The change in temperature levels is optimised in
such a way as to reach the comfort setpoint during
changeover times.

Optimum stop control max

The change in temperature levels is optimised in
such a way as to reach the comfort setpoint -1/4 °C
during changeover times.

Reduced Setpoint Increase

Line no.
HC1 HC2

Programming line

800 1100 Reduced setpoint increase start
801 1101 Reduced setpoint increase end

This function is used mainly in heating installations
that do not have high supplies of power (e.g. low
energy homes). In that case, when outdoor
temperatures are low, adjusting the temperature
would be too long.

Increasing the reduced setpoint prevents excessive
cooling of the rooms in order to shorten the
temperature adjustment period when changing over
to the comfort setpoint.

Comfort
set

p

oint(710)

Reduced
set

p

oint(712)

Begin
increase

(

800

)

End increase

(

801

)

Averaged OT

Heat Pump, Split System, Single Service, 3 phase

80 Maintenance Document 1394-1

Mixing Valve Control

Line no.
HC1 HC2

Programming line

830 1130 Mixing valve boost
834 1134 Actuator running time

Mixing valve boost

The controller adds the increase set here to the
current flow setpoint and uses the result as the
temperature setpoint for the heat generator.

Actuator running time

For 3-position control the valve servomotor travel
time can be adjusted. With a 2-position servomotor,
the adjusted travel time is inoperative.

Controlled floor drying function

Line no.
HC1 HC2

Programming line

850 1150 Floor curing function
851 1151 Floor curing setpoint manually
856 1156 Floor curing day current
857 1157 Floor curing days completed

This function is used in the controlled drying of
floors. It adjusts the flow temperature to a
temperature profile. Drying is performed by floor
heating via the heating circuit with a mixing valve or
with a pump.

"Controlled floor curing" function

• Off:
The function is deactivated.

• Heating operational (Fh):
The first part of the temperature profile is
automatically completed.

• Heating "ready for occupancy" (Bh)
The second part of the temperature profile is
handled automatically..

• Heating "ready for occupancy" / Heating
operational

The full temperature profile (1st and 2nd part) is
performed automatically.

• Manual
No temperature profile is performed, but the control
is performed according to the "manual controlled
drying setpoint". The function is automatically
terminated after 25 days

Important

o The standards and directions of the building
contractor must be followed!
o This function will not work properly unless
the installation has been adequately made
(hydraulics, electricity, settings). Otherwise, the
floors to be dried may be damaged!
o The function may be prematurely
interrupted by setting it to Off.

o The maximum flow temperature limitation
remains active.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 81

"Manual controlled curing" setpoint

The flow temperature setpoint for the "Manual"
controlled floor drying function can be adjusted
separately for each heating circuit.

Current controlled curing setpoint

Displays the current flow temperature setpoint for the
controlled floor drying function

Current day of controlled curing

Displays the current day of the controlled floor drying
function

Important:

After a power outage, the installation resumes the
controlled drying function as it was when the outage
occurred.

Operating Mode Changeover

Line no.
HC1 HC2

Programming line

900 1200 Optg mode changeover

(None / Frost protection mode / Reduced / Comfort / Automatic)

In case of an external changeover via input H2 (on
the extension module only) the operating mode to
which the changeover will be performed must be
previously defined.

Heating Circuit Frost Protection

The heating circuit frost protection is continuously

activated (protection mode

) and is not adjustable.

Heating circuit frost protection in heating mode

If the flow temperature is below 5°C, the controller
initiates the production of heat and starts the heating
pumps, regardless of the current heating mode.

If the flow temperature rises again above 7°C, the
controller waits another 5 minutes, and then stops the
production of heat and the heating pumps.

Heating circuit frost protection in cooling mode

See Cooling mode

Days

Heat pump
flow tem

p

Fh

Bh

X : Starting day

Fh + Bh

Heat Pump, Split System, Single Service, 3 phase

82 Maintenance Document 1394-1

6.3.5 Cooling Circuit 1 Functions

The cooling sequence is automatically started when
the room temperature is higher than the comfort
setpoint in cooling mode (line 902). The cooling
function must be activated (command line 901 =
Auto) and is triggered by the programming clock
(Command line 907).
The cooling sequence is interrupted as soon as
heating circuit 1 indicates a need for heat or in the
presence of a heat demand signal from a DHW circuit
or other heating circuit (only if cooling is active).

The controller measures the current room
temperature and compares it with the room
temperature setpoint to compute the flow temperature
setpoint. If the temperature is not low enough the
heat pump is started to provide cooling (reversed
control of the mixing valve).

The following settings apply to the hydraulic circuit in
zone 1 (HC1).
If there is a second zone, this zone can be cooled
with the setting 963 which will connect the pump
directly to zone 2. This will require setting the "Mixing
valve sub-cooling" parameter (938) to a suitable
value in order for both zones to be adequately cooled
according to the available emitters.

WARNING:

Cooling mode is prohibited on all radiators, heating­only floors, or any emitters not intended for this
purpose.

Operating Mode

Line no. Programming line

901 Operating mode

(Off / Automatic)

The cooling key on the user interface enables
switching between operating modes.

• Off:
The cooling function is deactivated.

• Automatic:
The cooling function is automatically activated by the
time program (command line 907), the holiday
program, the occupancy key, or according to the
need.

Comfort cooling setpoint

Line no. Programming line

902 Comfort cooling setpoint

In cooling mode the room temperature control follows
the comfort setpoint adjusted under this setting. The
cooling comfort setpoint can be displayed with a knob
on the room unit.

In summer the comfort setpoint is gradually increased
in relation to the outdoor temperature (see lines 918-

920).

Release:

Line no. Programming line

907 Release

(24h/day / heating circuit time pgm / Time program 5)

The "Release" setting determines the time program
according to which cooling is released.

• 24h/day:
Cooling is continuously activated (24h/day).

• heating circuit time program:
Cooling is activated according to the heating circuit
time program.

• Time program 5:
Cooling is released according to time program 5.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 83

Cooling Characteristic

Line no. Programming line

908 Flow temp setp at OT 25°C
909 Flow temp setp at OT 35°C

The controller computes the flow temperature
required for a given averaged outdoor temperature
based on the cooling characteristic. This is defined by
two reference points (flow setpoint at 25°C and at
35°C).

Flow temp setp at OT 25°C

This is the cooling flow temperature required when
the averaged outdoor temperature is 25°C, without
summer compensation.

Flow temp setp at OT 35°C

This is the cooling flow temperature required when
the averaged outdoor temperature is 35°C, without
summer compensation.

The cooling characteristic is adjusted for a 25°C room
temperature setpoint. If the room temperature
setpoint is changed the curve will automatically
adapt.

Eco

Line no. Programming line

912 Cooling limit at OT
913 Lock time after end of heating

Cooling limit at OT

If the composite outdoor temperature is higher than
the cooling limit, cooling is released. If the composite
outdoor temperature falls at least 0.5°C below the
cooling limit, cooling is locked.

Lock time after end of heating

To avoid a quick start of cooling after termination of
heating, the cooling function is locked for a time
period which can be adjusted with this setting. The
lock time starts when there is no valid heating
demand from heating circuit 1. Heating demands
from heating circuits 2 or P are ignored.

Information:

Switching off and switching on again the mode
selection key causes the lock time to be interrupted

25°C 35°C

909

908

Averaged
OT

Flow temp
set

p

oint

Heat Pump, Split System, Single Service, 3 phase

84 Maintenance Document 1394-1

Summer Compensation

Line no. Programming line

918 Summer comp start at OT
919 Summer comp end at OT
920 Summer comp setp increase

In summer the "cooling comfort setpoint" (902) is
gradually increased according to the outdoor
temperature. This saves on cooling power and
prevents the differences between the ambient
temperature of the room and the outdoor temperature
being too high.

The resulting "room temperature setpoint" (cooling)
can be viewed in the Info section.

Summer compensation start at OT

Summer compensation starts to be active from the
outdoor temperature defined here. If the outdoor
temperature continues to rise, the comfort setpoint
will be gradually increased.

Summer compensation end at OT

At this outdoor temperature the summer
compensation reaches its peak efficiency (920). If the
outdoor temperature continues to rise, it will no longer
influence the comfort setpoint.

Summer compensation setpoint increase

This setting defines the highest value to which the
comfort setpoint can be increased.

918

919

902

920

OT

Comfort
set

p

oint

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 85

Flow Setpoint Limitation

Line no. Programming line

923 Flow temp setp min at OT 25°C
924 Flow temp setp min at OT 35°C

It is possible to assign a lower limit to the cooling flow
temperature.
The limitation line will be defined by two reference
points.
In addition the resulting flow setpoint will have a lower
limit and may not be less than 5 °C.

Flow temp setp min at OT 25°C

Determines the lowest flow temperature for a
composite outdoor temperature of 25°C.

Flow temp setp min at OT 35°C

Determines the lowest flow temperature for a
composite outdoor temperature of 35°C.

Warning:

If no outdoor temperature is available, the controller
will use the "Min. flow setpoint at OT= 35°C"
parameter.

Room Influence

Line no. Programming line

928 Room influence

When using a room temperature sensor there are 3
different types of control to choose from.

SETTING CONTROL TYPE

- - - % Simple control according to outdoor conditions *

1...99 % Control according to outdoor conditions with room influence *
100 % Control according to room temperature only

* Requires the connection of an outdoor sensor

Simple control according to outdoor conditions

The flow temperature is obtained from the composite
outdoor temperature on the basis of the cooling
characteristic.

This type of control requires the cooling curve to be
properly adjusted, as the control does not take the
room temperature into account for this adjustment.

25°C 35°C

924

923

Averaged
OT

Flow temp
set

p

oint

Flow temp
set

p

oint

Heat Pump, Split System, Single Service, 3 phase

86 Maintenance Document 1394-1

Control according to outdoor conditions with
room influence

The difference between the room temperature and
the setpoint value is measured and taken into
account for temperature control. This enables taking
into account possible heat inputs and ensures a more
even room temperature. Thus the differences with the
room temperature are taken into account and the
room temperature becomes more stable. The
influence of the difference is defined as a percentage.
The better the installation in the reference room
(accurate room temperature, correct installation
location, etc.) the higher will be the value that can be
set.

Example:

• Approx 60%: the reference room is
appropriate

• Approx 20 %: the reference room is
inappropriate

Activation of the function requires taking into account
the following requirements:

• A room sensor must imperatively be
connected.

• The "room influence" parameter must be set
between 1 and 99.

• The reference room (where the room sensor
is installed) must not contain adjusted thermostatic
valves. Any thermostatic valves present in the rooms
must be fully open.

Control according to room temperature only

The flow temperature is adjusted according to the
room temperature setpoint, the current room
temperature and its evolution. A slight increase in
room temperature, for example, causes an immediate
drop in the flow temperature.

Activation of the function requires taking into account
the following requirements:

• A room sensor must imperatively be
connected.

• The "room influence" parameter must be set
to 100%.

• The reference room (where the room sensor
is installed) must not contain adjusted thermostatic
valves. Any thermostatic valves present in the rooms
must be fully open.

Room Temperature Limitation

Line no. Programming line

932 Room temperature limitation

The "room temperature limitation" function enables
shutting off the cooling circuit pump if the room
temperature falls below the adjusted room
temperature setpoint (with summer compensation line

920) by more than the adjusted differential.

The cooling circuit pump is reinitiated as soon as the
room temperature rises again above the current room
temperature setpoint.

If the room temperature limitation function is active,
no cooling demand will be transmitted to production.

The function is deactivated if:

• no room temperature sensor is available

• "Room influence limit." = ---

• "Room influence" (928) = --- (simple control

according to outdoor conditions)

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 87

Mixing Valve Control

Line no. Programming line

938 Mixing valve cooling offset
941 Actuator running time
945 Mixing valve in heating mode

Mixing valve cooling offset

The cooling demand issued by cooling circuit 1 to
production is reduced by the adjusted value.

If there is a second zone, this reduction should
enable the second zone to be cooled. To achieve this
result, the sub-cooling must be determined in
accordance with the type of emitter and the
parameter 963 "With prim control/prim pump" must
be set to "yes" to switch on the pump for the second
zone.

Example:

Configuration How the configuration affects control
Zone 1: Heating/cooling
floor
Zone 2: Fan coils

938 = 10°C,
with 924 = 18°C
963 = yes

with a 35°C outdoor temperature the flow
setpoint will be 18°C – 10°C i.e. 8°C
while in the first zone (HCF) it will be 18°C

through action of the mixing valve
Zone 1: Heating/cooling
floor
Zone 2: HCF

938 = 0°C,
with 924 = 18°C
963 = yes

with a 35°C outdoor temperature the flow

setpoint will be 18°C in both zones

WARNING:

If these settings are not chosen properly the heat
pump may stop automatically due to the flow
temperature being too low. A safety mechanism is
triggered at 6°C to protect the exchanger from
freezing.

Actuator running time

For the 3-position servomotor used, it is possible to
adjust the travel time. With a 2-position servomotor,
the adjusted travel time is inoperative.

Mixing valve in heating mode

Determines the position of mixing valve 1 (Y1 / Y2)
during heating operation is activated.

This parameter is inoperative in installations where
heating and cooling circuits are hydraulically
separate.
Control:

the valve controls in heating and cooling
mode.
Open:

the valve controls in cooling mode, and is open

in heating mode.

Heat Pump, Split System, Single Service, 3 phase

88 Maintenance Document 1394-1

Dewpoint Monitoring

Line no. Programming line

946 Lock time dewpoint limiter
947 Flow temp setp incr hygro
948 Flow setp incr start at r.h.
950 Flow temp diff. dewpoint

These settings are useful only when a dewpoint
sensor (hygrostat). is used.

Lock time dewpoint limiter

As soon as the dewpoint sensor detects
condensation, it closes its contact and switches off
the cooling process. When the contact reopens the
"dewpoint sensor lock time" period begins. Cooling
will resume only after this time period has elapsed.
The dewpoint sensor must be assigned to input H2
as "Dewpoint sensor".

Flow temp setp incr hygro

To avoid condensation due to an excessively high
humidity level in the room, a fixed increase in flow
temperature can be obtained by means of a
hygrostat. As soon as the humidity exceeds the value
set on the hygrostat, the hygrostat closes its contact
and activates the flow temperature increase defined
here.

The hygrostat must be assigned to an Hx input as
"Flow temp setpoint increase by hygrostat".

Flow setp incr start at r.h.

To avoid condensation caused by an excessively
high humidity level in the room, a gradual increase in
flow temperature can be performed by means of a
humidity measurement 0... 10 V.
If the room's relative humidity exceeds the value
"Beginning of flow temp increase at relative humidity",
the flow setpoint is gradually increased. The increase
beginning (line 948) and the maximum increase (line

947) can be adjusted.
The humidity sensor must be assigned to an H2 input
as "room relative humidity 10V".

Flow temp diff. dewpoint

The relative humidity of the ambient air and the
corresponding room temperature are used to
compute the dewpoint temperature.
To prevent condensation forming on the surfaces, the
value adjustable on line 950 determines the lower
limit of the flow temperature above the dewpoint
temperature.

This function can be deactivated with the setting - - - .
The humidity sensor must be assigned to an H2 input
as "Room relative humid. 10V" and a room
temperature sensor is required (input H2 as "Room
temperature 10V" or "room unit").

948

100%

947

Relative
humidit

y

Flow temp setpoint
increase

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 89

With prim controller/system pump

Line no. Programming line

963 With prim contr/system pump

(no / yes)

This setting specifies whether the cooling circuit is
supplied from the primary controller or from the
primary pump (depending on the installation). It can
also be used to provide cooling to the second zone.

Warning:

In the case of a radiator or any other emitter which
does not support the cooling mode in zone 2, this
setting must remain on "No".

Optg mode changeover

Line no. Programming line

969 Optg mode changeover

(none / Off / Automatic)

In case of an external change via inputs H2 the
operating mode to which the changeover will be
performed must be previously defined

6.3.6 DHW Functions

The control sets the DHW temperature, according to
the time program or continuously, to the desired
setpoint. The priority of DHW charging over room
heating is adjustable in this case.

The controller has a configurable legionella function
designed for protection against legionella in the
storage tank and the pipes. The circulation pump is
controlled according to the current time program and
operating mode.

Setpoint value

Line no. Programming line

1610 Nominal setpoint
1612 Reduced setpoint

The DHW is heated to various setpoint values. These
setpoints are active according to the selected

operating mode and allow the desired temperatures
to be reached in the DHW storage tank.

Important:

For optimal operation we recommend reducing the
setpoints to the lowest value.
Setpoints which are too high may interfere with
heating and cause some discomfort. In this case
DHW/Heating changeover cycles may successively
occur.

If DHW charge boosting is not desired during the day,
we recommend adjusting the reduced temperature
setpoint to 15°C. Full charging will occur during the
night at the nominal temperature.

DHW reduced setpoint

Nominal setpoint DHW max setpoint

Heat Pump, Split System, Single Service, 3 phase

90 Maintenance Document 1394-1

Release

Line no. Programming line

1620 Release

(24h/day / Heating circ time pgm / Time program 4/DHW / Low-tariff/ Time pgm 4/DHW or Low-tariff)

24h/day

(Not recommended)

Regardless of the time programs, the temperature of
the domestic hot water is continuously maintained at
the DHW nominal setpoint temperature.

Example:

Heating circuit time programs:

(Not recommended)

Depending on the heating circuit time programs, the
DHW setpoint is changed between the DHW
temperature nominal setpoint and the DHW

temperature reduced setpoint. The first switch-on
point of each phase is advanced by one hour each
time.

Example:

Time program 4 / DHW:

(Recommended)

Time program 4 of the local controller is taken into
account for the DHW mode. The changeover
between DHW nominal setpoint and DHW reduced

setpoint occurs on the changeover times of this
program. Thus, domestic hot water charging takes
place independently from the heating circuits.

Low tariff

Released when the low tariff input is active (Input
Ex5)

Time pgm 4/DHW or low tariff

Released when DHW program 4 is set to "Nominal"
or if the low tariff input is active.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 91

DHW mode Holiday

status

Release

(settings 1620)

Time pgm

status (Pgm 4)

Low tariff

status

(Ex5)

DHW mode level

Off x x x x Frost protection
On Yes x x x Frost protection
On No … … x …
On No Low tariff (OPK) x Inactive Reduced
On No Low tariff (OPK) x Active Nominal
On No Time pgm 4 or OPK Nominal Inactive Nominal
On No Time pgm 4 or OPK Reduced Inactive Reduced
On No Time pgm 4 or OPK Nominal Active Nominal
On No Time pgm 4 or OPK Reduced Active Nominal

x = indifferent

Information:

Release by low tariff input always triggers forced
DHW charging

If the low tariff input EX5 has not been configured and
release via OPK has nevertheless been set, the DHW
level will either continuously remain on reduced or will
follow time program 4.

Legionella Function

Line no. Programming line

1640 Legionella function
1641 Legionella funct periodically
1642 Legionella funct weekday
1644 Legionella funct time
1645 Legionella funct setpoint
1646 Legionella funct duration
1647 Legionella funct circ pump

Legionella function:

• Periodic
The legionella function occurs repeatedly according
to the adjusted periodicity (command line 1641).

• Fixed weekday
The legionella function can be activated on a fixed
day of the week (command line 1642). With this
setting, heating up to the legionella setpoint occurs
on the scheduled day of the week, regardless of the
storage tank temperatures during the previous period.

Legionella function circulation pump:

The DHW circulation pump can be activated during
the period of time the legionella function is performed.

Important:

During the period of time legionella function is carried
out, there is a risk of scalding when opening the taps.

Heat Pump, Split System, Single Service, 3 phase

92 Maintenance Document 1394-1

Circulation Pump

Line no. Programming line

1660 Circulation pump release

Circulation pump release

The "DHW release" setting switches on the
circulation pump when DHW production is released.

6.3.7 Swimming Pool Functions

Line no. Programming line

2056 Setpoint source heating

The controller enables a swimming pool to be heated
by the heat pump. An individual setpoint can be set
by means of parameter 2056, which appears when
the swimming pool function is activated by parameter
6046 being set to "Swimming pool release".

Use of input H2 requires an extension to be
connected to the control. If an extension already
exists (e.g. for a second zone) then the pool
extension switches must always be addressed as
"module2" and the additional heating circuit zone
must be addressed as "module 1".

6.3.8 Heat Pump Functions

Line no. Programming line

2844 Switch-off temp max
2882 Release integr electric flow
2884 Release el flow at OT
2910 Release above OT
2920 With electrical utility dock

Switch-off temp max

If the flow or the return temperature exceeds the
maximum switch off temperature, the compressor will
be switched off.

Release integr electric flow

After the release of the 1st stage (K25), the controller
compares the temperature measured with the point of
engagement and forms an integral and includes a
possible deficit of heat. Once the value of the integral
reaches the maximum value (2882), the 2nd stage is
engaged (Stop K25, K26 regulates). The controller
continuously compares the temperature measured at
the point of engagement and new features to the
deficit of heat in the full release. When the full release
reaches the value set (2882), the 3rd stage of the
heater is triggered (K25 and K26 regulates fixed).

Flow elec. release at OT

The heater will be activated only if the attenuated
outdoor temperature is below the temperature set
here.

Warning:

If this setting is too low, there may be a feeling of
discomfort due to the fact that the heat pump is
unable to meet the heating requirements alone at low

outdoor temperatures, and heaters are not switched
on.

Release above OT

The heat pump is released only when the composite
outside temperature lies above the value set here.
Below this outside temperature level, the amount of
heat required must be delivered by some other heat
source.

With electrical utility dock

This setting relates to input Ex4 (load-shedding or
peak day clearing) and allows the electric heaters to
be locked as follows:

• Locked:
The heat pump and all electric heaters are locked,
both heat pump stages and the DHW tank electric
auxiliary.
Only the boiler backup, if installed, continues to
operate

• Released
The heat pump operates and all electric heaters are
locked, both heat pump stages and the DHW tank
electric auxiliary.
The boiler backup, if installed, continues to operate.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 93

6.3.9 DHW Tank Functions

DHW charging at the nominal setpoint temperature
(1610) always takes place in two stages. In the first
stage, only the heating pump heats the DHW tank.
The power supplied during this time is at its peak.
Then, when the heat pump is no longer able to supply

enough heat to reach the setpoint value, it switches
on the DHW tank auxiliary if authorised. The auxiliary
will be cut off when charging is complete.
While the DHW tank charging process via the electric
auxiliary is finishing, the heat pump resumes heating.

Charging Control

Line no. Programming line

5020 Flow setpoint boost
5024 Switching differential
5030 Charging time limitation

Flow setpoint boost :

The DHW demand made to the generator is
comprised of the current DHW setpoint plus the
adjustable setpoint boost.

Switching differential :

If the DHW temperature is lower than the current
setpoint minus the differential set here, the DHW
charging process is launched.
It ends when the temperature reaches the current
setpoint.

Information:
Forced charging is triggered on the first DHW
release of the day.
Charging is also launched when the DHW
temperature is within the differential, and as long as
it is not less than 1K above the setpoint.

Charging time limitation

During charging, the room heating (depending on
the charging priority defined on line 1630 and on
the hydraulic circuit) may be stopped or insufficient.
Therefore it is often advisable to limit the charging
process timewise to enable heating.

If "- - -" has been selected the charging time
limitation will be deactivated. The DHW will be
heated to the nominal setpoint, even if the room
heating has not received enough power in the
meantime.

If a value between 10 and 600 is selected, charging
will be suspended after the time period set in
minutes, and will remain suspended over that time
before resuming. The generator power remains
available in the meantime to heat the room. This
cycle is repeated until the DHW nominal setpoint
has been reached.

Information:

When the room heating is stopped (summer mode,
economy function, etc.), DHW charging remains
active, regardless of the setting.

Heat Pump, Split System, Single Service, 3 phase

94 Maintenance Document 1394-1

Heater

Line no. Programming line

5060 El imm heater optg mode
5061 Electric immersion heater release

El imm heater optg mode

• Substitution
The heater performs DHW charging as soon as the
heat pump is stopped or becomes inoperative, or if
the heat pump has finished charging without reaching
the setpoint.
The DHW tank heater switch-on point is calculated so
as to optimise the changeover level.
If the DHW temperature falls below the current
setpoint (1610 or 1612) minus the differential (5024)
the heat pump will resume operation.

• Summer
When all heating circuits change to summer mode,
the heater performs DHW charging starting on the
next day. The heat pump therefore stays off in
summer mode.
Production of DHW by the heat pump will resume
only if at least one heating circuit changes over to
heating mode. In that case, the heater operating
mode is the same as described in the "Substitution"
setting.

• Always
DHW charging is always carried out by means of the
heater.

• Cooling mode
When the heat pump operates in cooling mode, it is
possible to specify whether a DHW charging is to be
carried out via the heater, without cooling being
interrupted.
The DHW is prepared by the heater, if the heat pump
is in cooling mode or is not available (e.g. out of
order).

Information:

The DHW mode selection key also acts on the
heater. In order for DHW charging to take place, the
DHW key must be on.

Electric immersion heater : release

• 24h/day
The heater is continuously active regardless of time
programs.

• DHW release
The heater is controlled according to "DHW release".

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 95

• Time program 4/DHW
Time program 4/DHW of the local controller is taken
into account for the heater.

Information:

Switch-on will actually be in effect only if the heater is
able to operate according to the "heater operating
mode" setting.

6.3.10 Configuration Functions

When an installation is started up, the hydraulic
diagram presetting for that installation must be
entered.

Presettings

Line no. Programming line

5700 Preselection

Cooling Circuit 1

Line no. Programming line

5711 Cooling circuit 1 (Off / 4-pipe system / 2-pipe system)

Off

The cooling circuit is deactivated.

4-pipe system:

Not compatible with the Waterstage heat pump. This
setting relates to passive cooling.

2-pipe system:

Activates the heat pump cooling mode. However, the
cooling kit must have been previously connected.

Warning:

If the cooling kit has not been connected and the
cooling mode is activated the heat pump will behave
abnormally and might cause some unwanted
discomfort.
Information:
Switching on the cooling mode causes the menu
'"Cooling circuit 1" to appear.

Combi storage tank

Line no. Programming line

5870 Combi storage tank

Cont type input EX

Line no. Programming line

5987 Cont type input EX4
5989 Cont type input EX5

Heat Pump, Split System, Single Service, 3 phase

96 Maintenance Document 1394-1

Input H2 Function

Input H2 is available only on the control extension
module. No more than two extension modules can be
fitted into an installation. In this case the settings on

contact H2 will be assigned to the module with
address 1. Only one function can be assigned to
input H2 even if there are two modules.

Line no. Programming line

6046 Function Input H2
6047 Contact type H2
6048 Function value Contact H2

Function Input H2

• Operating mode changes:

o Heating circuits
The operating mode for the heating circuit(s) is
changed via terminal H2 (e.g. telephone contact) to
protection mode.

o Domestic hot water
Domestic hot water charging lock is active only with
setting 1 (heating circuits + DHW). All temperature
demands from heating circuits and DHW are ignored.
Frost protection is active during this time.

• Error/alarm message
The closing of input H2 causes an internal error
message from the controller.

• Dewpoint sensor
A dewpoint sensor can be connected to input H2 to
detect condensation.
If it responds, the cooling circuit is immediately
switched off.
The cooling circuit is reactivated only if the sensor
goes off after the adjustable lock time (line 946) has
elapsed.

• Swimming pool release
This function enables the swimming pool to be
directly heated with the boiler and pump H2 via an
external device (e.g. manual switch).

Direct charging always requires release on input H2.
For configuration: set input H2 to "Swimming pool
release" and wire the contact.

Warning:

If there are two extension modules (e.g.: 2

nd

zone +
pool) the second zone module have the address 1
and the pool module must have the address 2
because contact H2 enabling the swimming pool
mode must be wired to the address 1.

Contact type H2

• Normally closed
The contact is normally closed and must be open to
activate the selected H2 function.

• Normally open
The contact is normally open and must be closed to
activate the selected H2 function.

Function value Contact H2

The function value contact H2 is operated only when the
parameter 6046 is setting on “release swimming pool”.
This function allows to set the temperature of the water
which goes on the swimming pool heat exchanger.

Sensor Corrections

Line no. Programming line

6100 Readjustm outside sensor

The outdoor temperature measuring value can be
corrected within a range of +/- 3 K.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 97

Installation Frost Protection

Line no. Programming line

6120 Frost protection for the plant

According to the outdoor temperature, the heating
circuit pump and the condenser pump are switched
on although there is no demand for heat

Miscellaneous

Line no. Programming line

6205 Reset to default parameters
6220 Software version

Reset to default parameters :

All parameters can be reset to factory settings,
except when it comes to the following pages: Time
and date, User interface and all time programs, as
well as the operating hours and the various counters.

Software version:

The software version represents the controller
software status at the time the unit is being produced.
It is printed on the back of the unit.
The first two digits represent the software version,
and the third is the revision number (e.g. 01.0)

6.3.11 Error Functions

When a fault occurs, the symbol appears and it is
possible to display an error message in the Info
section by pressing the Info key.

The display shows what caused the fault.

Reset (unlock) Heat Pump

Line no. Programming line

6711 Reset HP

This line is used to clear the heat pump error
messages. The predetermined switch-on delay in
case of a failure is therefore ignored, which avoids
waiting periods during servicing / troubleshooting.

This option should not be used in normal operating
conditions.

Outdoor
temperature

Pump Diagram

Continuously ON
Set to ON for 10 min, approx. every
6 hours.
Continuously off

ON
Periodically ON
OFF

Heat Pump, Split System, Single Service, 3 phase

98 Maintenance Document 1394-1

Fault Indication Function

Line no. Programming line

6740 Flow temp 1 alarm
6741 Flow temp 2 alarm
6745 DHW charging alarm
6746 Flow temp cooling 1 alarm

The difference between the setpoint value and the
current temperature value is monitored. Any
difference which continues after the set time period
has elapsed will trigger an error message.

Fault History

Line no. Programming line

6800 to 6818 Time stamp and history of faults 1 -10

The controller saves the last 10 faults which have
occurred to a non volatile memory. Any new entry will
delete the oldest entry from the memory.
A fault code and a time are saved for each fault.

Error Code List

Designation of error

The error designations in the table below are
displayed in plain text on the user interface.

Location

The sensor or contact associated to the error
message.

Reset

Reset is either automatic or manual, depending on
the type of error (see table below with error
messages).

Manual reset

Errors which are displayed in the Info section and
accompanied by the "Reset?" question can be
manually reset.
Press the "OK" key once, "yes" flashes on the
display. Press the "OK" key again to confirm the "yes"
and the error will be reset.

Automatic reset

Automatic clearing occurs after a previously set time
(OEM setting) has elapsed. After this timeout (6
hours by default) has elapsed, the controller will
attempt to reset the error.
If "Number" appears in the table, it is possible to
define how many times the fault can be reset before
the heat pump is declared out of order.

Heat pump operation

Shows whether or not the heat pump can continue to
operate when the error occurs.

Yes

The heat pump continues to operate despite the error
message.

No

The error interrupts operation of the heat pump.

No with glycol water

This error stops glycol water heat pumps, but does
not prevent operation of water or air heat pumps.

No with water

This error stops water heat pumps, but does not
prevent operation of glycol water heat pumps

No with air

This error stops air heat pumps, but does not prevent
operation of water heat pumps or glycol water heat
pumps.

Per diagram

The heat pump will be stopped according to the
current installation diagram.

Alarm messages

Errors are ranked by priority. From priority 5 onward
(i.e. priority levels 5 - 9) the alarm messages used in
remote control (OCI) are sent. In addition, the alarm
relay is switched on.

Heat Pump, Split System, Single Service, 3 phase

Maintenance Document 1394-1 99

Table of error messages which can be displayed:

Reset

No. Designation of error Location

Manual Automatic

HP oper. Priority

0: No fault
10: Outdoor sensor B9 No No Yes 6
30: Flow sensor 1 B1 No No Yes 6
31: Cooling flow sensor 1 B16 No No Yes 6
32: Flow sensor 2 B12 No No Yes 6
33: Heat pump flow temp
sensor error

B21 No No Yes 6

44: Heat pump return temp sensor

error

B71 No No per diagram 6

50: DHW temp sensor 1 B3 No No Yes 6
60: Room sensor 1 No No Yes 6
65: Room sensor 2 No No Yes 6
76: Special sensor 1 BX No No Yes 3
83: BSB wire short-circuit No No Yes 8
84: BSB, address collision No No Yes 3
85: Radio communication error No No Yes 8
98: Extension module 1 No No Yes 8
99: Extension module 2 No No Yes 8
100: 2 master clocks on bus No No Yes 3
102: Clock without running
supply

No No Yes 3

105: Maintenance message No No Yes 5
121: HC1 flow temp too low No No Yes 6
122: HC2 flow temp too low No No Yes 6
126: DHW charge monitoring No No Yes 6
127: Anti-legionella temperature No No Yes 6
134: Heat pump alarm summary E20 Yes Number * No 9
138: No heat pump control
sensor

No Yes No 1

146: Sensor / control device
configuration

No No Yes 3

171: Alarm contact 1 activated No No Yes 6
172: Alarm contact 2 activated H2 No No Yes 6
176: Hydraulic pressure 2 too
high

H2 No No Yes 6

177: Hydraulic pressure 2 too
low

H2 No No No 6

178: HC1 safety thermostat No No Yes 3
179: HC2 safety thermostat No No Yes 3
201: Frost alarm B21/71 Yes No No 9
243: Swimming pool sensor B13 No No Yes 6
325: BX/ext unit: same sensors No No Yes 3
327: Ext modules: same
functions

No No Yes 3

329: Ext modules/mixing grp:
same functions

No No Yes 3

330: BX1 no function No No Yes 3
331: BX2 no function No No Yes 3
332: BX3 no function No No Yes 3
333: BX4 no function No No Yes 3
334: BX5 no function No No Yes 3
335: BX21 no function No No Yes 3
336: BX22 no function No No Yes 3
357: cooling circuit flow temp
not reached

No No Yes 6

359: no cooling valve Y21 No No Yes 3

Heat Pump, Split System, Single Service, 3 phase

100 Maintenance Document 1394-1

Reset

360: no process reversing valve
Y22

No No Yes 3

364: Heat pump cooling system
error

No No Yes 3

369: External fault No
370: Outdoor unit fault No

Number* If such statuses or events occur for the first
time, they will not directly generate a fault message,
but only a status message.

Only if the anomaly occurs repeatedly over a
predefined time period and at a given frequency
(number) will an error message be generated.