Fujitsu WATERSTAGE 112 Maintenance Document Download Page 95

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Heat Pump, Split System, Single Service, 3 phase

Maintenance Document

1394-1

•

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

Summary of Contents for WATERSTAGE 112

Page 1: ...tem 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 ...

Page 2: ......

Page 3: ...justment 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 ...

Page 4: ...ly 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 R...

Page 5: ... 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 ...

Page 6: ...ERSTAGE 112 WATERSTAGE 140 WATERSTAGE 160 Pout 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 Pout 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 Pout 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 Pout 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 Performan...

Page 7: ...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 ...

Page 8: ...age 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 ...

Page 9: ... 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 THHO THO THD THPI TH...

Page 10: ...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 ...

Page 11: ...nce 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 explosion proof and therefore th...

Page 12: ...ly 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 Outd...

Page 13: ...ich 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 ...

Page 14: ...ompliance 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 rati...

Page 15: ...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 ...

Page 16: ...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 ...

Page 17: ... 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 Refrigerati...

Page 18: ...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 accord...

Page 19: ... 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 weat...

Page 20: ...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 O...

Page 21: ...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 Tnominal will be reached according to time program 4 DHW The Tnominal temperature can thus be reached at any time including during the day During the day DHW has priority over heating however DHW production is contr...

Page 22: ...alve 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 ...

Page 23: ...es 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 hea...

Page 24: ... 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 conne...

Page 25: ... 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 thermist...

Page 26: ...age 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 ...

Page 27: ...nd 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 inter...

Page 28: ... 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 sy...

Page 29: ... 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 bo...

Page 30: ...rect 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 e...

Page 31: ...onnected 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...

Page 32: ... 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 electro...

Page 33: ...rect 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...

Page 34: ...rect 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 e...

Page 35: ...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 ...

Page 36: ...ck 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...

Page 37: ...orrect 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...

Page 38: ...ck 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 ...

Page 39: ...ure 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 ...

Page 40: ... 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 Termin...

Page 41: ...ilure 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 Inverte...

Page 42: ...e 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 hol...

Page 43: ...e 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 Ch...

Page 44: ...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 cha...

Page 45: ...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 conn...

Page 46: ...ain 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 Ch...

Page 47: ... 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 I...

Page 48: ...c 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 a...

Page 49: ...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...

Page 50: ...e 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 betw...

Page 51: ...pressor 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 ...

Page 52: ...8 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 ...

Page 53: ...sor 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 ...

Page 54: ...k 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 ...

Page 55: ...r 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 comin...

Page 56: ...ector 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 ...

Page 57: ... 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 a...

Page 58: ...wdriver 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 b...

Page 59: ...erter 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 poi...

Page 60: ... 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...

Page 61: ...afety 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 ...

Page 62: ...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...

Page 63: ...ime 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 H...

Page 64: ...eriod 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...

Page 65: ...s 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 3...

Page 66: ...mming 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 outsid...

Page 67: ...ry 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 2...

Page 68: ...ircuit 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 t...

Page 69: ...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...

Page 70: ... 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 H...

Page 71: ... 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 wil...

Page 72: ...sion 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...

Page 73: ...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...

Page 74: ...as 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 s...

Page 75: ... 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 tempera...

Page 76: ...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 temperatu...

Page 77: ...gramming 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 750 105...

Page 78: ...een 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 immedi...

Page 79: ...ach 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 ...

Page 80: ...file 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 operati...

Page 81: ...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 fro...

Page 82: ...in order for both zones to be adequately cooled according to the available emitters WARNING Cooling mode is prohibited on all radiators heating only 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 Autom...

Page 83: ...c 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 cool...

Page 84: ...he 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 9...

Page 85: ... 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 acco...

Page 86: ...ully 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 connect...

Page 87: ...ure 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 l...

Page 88: ... 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 f...

Page 89: ...d 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 ...

Page 90: ...e 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 tim...

Page 91: ... 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 perio...

Page 92: ...gement 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 he...

Page 93: ...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 ...

Page 94: ...e 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 possibl...

Page 95: ...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 activ...

Page 96: ... 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 S...

Page 97: ...ion 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 ca...

Page 98: ...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 ...

Page 99: ...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 Hydra...

Page 100: ...ooling 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 ...

Page 101: ...n The average number of compressor startups per hour of operation obtained over a period of 6 weeks If the value exceeds the Comp1 max startups hr op adjusted setting the symbol will be displayed and a maintenance message will appear in the Info section 8 Too many compressor 1 startups Priority 9 This setting can be reset with the associated rights of access Diff condens max week This setting indi...

Page 102: ...operation setting on line 7141 Automatic As soon as a fault occurs on the heat pump emergency operation is automatically switched on It stops when the fault is removed and if necessary cleared reset Emergency mode may however be activated deactivated manually via the Emergency operation setting on line 7141 Simulation Line no Programming line 7150 Simulation outside temp Simulation outside temp 71...

Page 103: ...Module 2 Relay output QX7 Warning During testing of an output the heat pump is stopped all outputs are off and only the controlled output is on Analog Input Output Testing Line no Programming line 7710 Output test UX 7711 Voltage signal UX 7720 Digital output test 7721 Digital output DO1 7722 Digital output DO2 Output test UX Enables testing the outdoor unit control Voltage signal UX Displays the ...

Page 104: ...d that the respective input is currently inactive The 230 V display indicates that a 230 V voltage is present on the associated input and therefore that the input is active 6 3 14 Status Functions The current operating status of the installation can be viewed by means of status displays Messages Line no Programming line 8000 State heating circuit 1 8001 State heating circuit 2 8003 State DHW 8004 ...

Page 105: ...HW priority Restriction storage tank Forced draft Forced draft storage tank Forced draft DHW Forced draft generator Forced draft Switch off delay active Comfort heating mode Optimis at switch on accelerated heating Optimisation at switch on Accelerated heating Comfort heating mode Reduced heating mode Optimisation at switch off Reduced heating mode Frost protection active Room frost protection Flo...

Page 106: ...mp Forcing anti legion setpoint Forcing comfort setpoint Charging by heater Charging by heater anti legion setpoint Charging by heater Comfort setpoint Charging by heater Reduced setpoint Charging by heater frost protection setpoint Heater released Accelerated charging active Flow active Anti legion accelerated charging Charging active Charging anti legion setpoint Charging Comfort setpoint Chargi...

Page 107: ...g mode locked Locked heating mode Lock time after heating Locked generator Locked storage tank Cooling mode restricted Flow temp setpoint increase by hygrostat Dewpoint flow min limit Outdoor temp flow min limit Comfort cooling mode Comfort cooling mode Switch off delay active Cooling protection mode Cooling protection mode Frost protection active Frost protection active OT cooling limit activated...

Page 108: ...on Defrosting activated Defrosting activated Cooling mode active Comp min ON time active Comp 1 ON Heating Comp min ON time active Heat deficiency compensation Max cond diff limit Min cond diff limit Comp 1 and heater ON Comp 1 ON Heater ON Frost protection active Install frost protection active Off Flow active Switch off delay active No demand State swimming pool 8011 End user Info level Startup ...

Page 109: ... Programming line 8050 8068 Timestamping and history status coding of faults 1 10 The last 10 status messages are saved and displayed with the associated codes The most recent message is saved to History 1 the oldest to History 10 Information Status displays for the end user can be viewed directly in the Info section on the room unit 6 3 15 Generator Diagnosis Functions Various setpoints and actua...

Page 110: ...er el flow These lines are used to view the hours of operation and the number of startups of electric heater 6 3 16 Consumer Diagnosis Functions Various setpoints and actual values relay switch status and timing status data can be displayed for purposes of diagnosis Outdoor Temperatures Line no Programming line 8700 Outside temperature 8701 Outside temp min 8702 Outside temp max 8703 Outside temp ...

Page 111: ...erating hour and startup counters are displayed as well as temperatures of the primary controllers and DHW heater Swimming Pool Line no Programming line 8900 Swimming pool temp The current temperature of the swimming pool is displayed Line Line no Programming line 8950 Common flow temp Multifunction Relay Status Line no Programming line 9031 Relay output QX1 9032 Relay output QX2 9033 Relay output...

Page 112: ... 9052 Relay output QX23 module 1 9053 Relay output QX21 module 2 9054 Relay output QX22 module 2 9055 Relay output QX23 module 2 The switching status of the relays connected to extension modules 1 and 2 can be viewed on these programming lines The display Off means that the components assigned to this output are currently disconnected The display On means that the associated components are current...

Page 113: ... leaks 7 2 Outdoor unit clean heat exchanger clean refrigeration and ventilation compartment check for correct condensation drain conduct refrigeration circuit leak test required if charged 2 kg 7 3 Electrical Inspect connections and tighten where appropriate Check condition of wires and boards 7 4 Operating checks conduct refrigeration readings at temperatures in case of malfunction install press...

Page 114: ...Heat Pump Split System Single Service 3 phase 114 Maintenance Document 1394 1 8 Connection Diagrams 8 1 Connection Diagram of Hydraulic Unit ...

Page 115: ...Heat Pump Split System Single Service 3 phase Maintenance Document 1394 1 115 8 2 Connection Diagram of Outdoor Unit Heat exchanger MID ...

Page 116: ...ment 1394 1 9 Disassembly Process of Outdoor Unit Warning Before servicing the unit turn the power supply switch OFF then do not touch electric parts for 10 minutes due to the risk of electric shock 9 1 Appearance 9 2 Service panel removal 9 3 Insulation sheet removal ...

Page 117: ...Heat Pump Split System Single Service 3 phase Maintenance Document 1394 1 117 9 4 Main PCB removal 9 5 INVERTER PFC FILTER and CAPACITOR PCB removal ...

Page 118: ...Heat Pump Split System Single Service 3 phase 118 Maintenance Document 1394 1 9 5 1 INVERTER PCB removal 9 5 2 PFC PCB removal 9 5 3 FILTER PCB removal ...

Page 119: ...Heat Pump Split System Single Service 3 phase Maintenance Document 1394 1 119 9 5 4 CAPACITOR PCB removal ...

Page 120: ...Heat Pump Split System Single Service 3 phase 120 Maintenance Document 1394 1 9 6 FAN MOTOR removal 9 7 TOP PANEL removal 9 8 PIPE COVER FRONT removal ...

Page 121: ...p Split System Single Service 3 phase Maintenance Document 1394 1 121 9 9 RIGHT PANEL removal 9 10 REACTOR removal 9 11 THERMISTOR removal 9 11 1 HEAT EXCHANGER OUT THERMISTOR 9 11 2 EXPANSION VALVE THERMISTOR ...

Page 122: ...ce Document 1394 1 9 12 SOLENOID COIL removal 9 12 1 4WAY VALVE 9 12 2 INJECTION 9 13 EEV COIL removal 9 13 1 MAIN 9 13 2 INJECTION 9 14 PRESSURE SENSOR removal Warning Wear gloves to prevent the frostbite because a small amount of refrigerant leaks during work ...

Page 123: ...ure or debris to get inside refrigerant pipes during work Procedure for compressor removal 1 Turn off the power 2 Remove the service panel 3 Fully close the 3Way valve gas and 3Way valve liquid 4 Collect the refrigerant from the 3Way valve Start the following work after completely collecting the refrigerant Do not reuse the refrigerant that has been collected ...

Page 124: ...edure for compressor installation Reverse procedure to removing the compressor Precautions for installation of compressor 1 When brazing do not apply the flame on the terminal 2 When brazing be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale ...

Page 125: ...Heat Pump Split System Single Service 3 phase Maintenance Document 1394 1 125 9 16 Precautions for exchange of refrigerant cycle parts ...

Page 126: ...Heat Pump Split System Single Service 3 phase 126 t n e m u c o D e c n a n e t n i a M 1394 1 10 Spare Parts The data is being prepared ...

Page 127: ...on either or both zones If the installation comprises radiators or fan coils and a heating floor zone 1 will be the heating floor zone and zone 2 will be the radiator or fan coil zone Zone 1 will be the one equipped with the mixing valve 11 4 Room Sensor 11 4 1 Room thermostat The room thermostat is optional Select an appropriate place for the room thermostat by following these rules Central room ...

Page 128: ...llation is equipped with 2 room thermostats the second thermostat must be connected to the second terminal block b Configuration Gain access to the settings by continuously pressing the Heating mode key fs 1 factory setting Æ The room unit is addressed as ZONE 1 fs 2 Æ The room unit is addressed as ZONE 2 fs 3 Æ The room unit is addressed as ZONE 3 factory setting P1 1 factory setting Automatic sa...

Page 129: ...n series on the Hydraulic Unit It can be used therefore not only to measure the room temperature but also to view the operating status of the heat pump to enter the pump settings appropriate to the house and to the application s hydraulic circuit Installation Select heating mode Select DHW mode Exit setting Confirm setting Adjust Comfort temp setpoint Navigation and settings Occupancy key Display ...

Page 130: ...tion valve designed to isolate the boiler and a pressure breaker When a boiler is connected to the heat pump the electric auxiliaries installed in the heat pump must not be connected as it is the boiler which provides additional heating on the coldest days The boiler is controlled by the heat pump If the boiler has its own control system you must disconnect or disable the system by assigning it th...

Page 131: ...1 heating circuit by default 2 Waterstage 1 heating circuit and DHW tank 3 Waterstage 2 heating circuits 4 Waterstage 2 heating circuits and DHW tank 5 Waterstage boiler backup and 1 heating circuit 6 Waterstage boiler backup and 2 heating circuits 7 Waterstage boiler backup 1 heating circuit and DHW tank 8 Waterstage boiler backup 2 heating circuits and DHW tank 3 Time Date and time programs for ...

Page 132: ...ns between units pipe length flared joints etc Installation of HP LP pressure switches on liquid line small pipe Pumpdown required Nitrogen leak test 25 bar Refrigerant filling of Hydraulic Unit and pipes opening of refrigeration valves to Outdoor Unit Electrical Checks Outdoor unit See Electrical Connections section of Installation instructions OK NON COMPLIANT VALUE 400v main power supply Protec...

Page 133: ..._ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ ______________________________________...

Page 134: ...ircuit option warmer one e g radiators Faults If a fault occurs press Info key 1010 Comfort heating setpoint Heat circuit 2 No 10 outdoor sensor 1012 Reduced setpoint Heat circuit 2 No 33 flow temp sensor 1020 Heating curve slope Heat circuit 2 No 44 return temp sensor 1050 Room influence Heat circuit 2 No 50 DHW temp sensor 1090 1091 Opt start stop control max Heat circuit 2 No 60 room sensor 1 1...

Page 135: ... water input temp C T secondary ______ C Evaporation temp LP ______ bars C Suction temp C Overheating ______ C Heat exchanger air input temp C T Evaporation ______ C Heat exchanger air output temp C T Heat exchanger ______ C Hydraulic system on Hydraulic Unit Low temp heating floor Pump brand ___________ Type __________ LT Radiators Secondary system Fan coils Pump brand ___________ Type __________...

Page 136: ...Heat Pump Split System Single Service 3 phase 136 Maintenance Document 1394 1 Fujitsu General Euro GmbH Werftstrasse 20 40549 Düsseldorf Germany ...

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