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
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