Nibe F2120 Series User manual

Service manual
LEK
F2120
Air/water heat pump
TEM EN 1726-1
431572

Table of Contents
31 Important information
3Document information
3Safety information
42 The heat pump design
4General
9Distribution box
103 System description
10Principle of operation
11System diagram
144 Component description
14Compressor (GQ10)
14Inverter
15The base board
17Base board’s contacts
18Electronic expansion valve
18Other components
19Sensor placement
215 Troubleshooting
21Basic actions
21
Low hot water temperature or a lack of hot
water
21Low room temperature
21High room temperature
21
Ice build-up in the fan, grille and/or fan cone
on the outdoor module
21Large amount of water below F2120
22Alarm list
276 Removing the covers
27Basic
287 Technical data
28Dimensions and setting-out coordinates
29Technical specifications
34Accessories
35Item register
F2120Chapter |2

Document information
This technical manual is a complement to the Installer
handbook for F2120, containing:
■Description of functions and component description.
■Information to facilitate fault-tracing.
■Instructions for replacing components.
■Supplementary technical information.
The document applies to F2120 with software versions
up to and including 473.
The heat pump software version can be found in the info
menu on the indoor module/control module (menu 3.1).
Safety information
Symbols
NOTE
This symbol indicates danger to person or ma-
chine .
Caution
This symbol indicates important information
about what you should observe when maintain-
ing your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
The CE mark is obligatory for most products sold
in the EU, regardless of where they are made.
CE
Classification of enclosure of electro-technical
equipment.
IP24
Danger to person or machine.
!
Read the Installer Manual.
Serial number
The serial number can be found at the top left on the
rear cover and at the bottom on the side.
F2120
Serial number
Caution
You need the product's (14 digit) serial number
for servicing and support.
3Chapter 1 | Important informationF2120
1 Important information

General
F2120 (1x230V)
LEK
GQ1
AA2
UB1
BT12
EP2
XL1
BT3
XL2
HS1
XL21
BT84
QN1
QN4
RM1
QN2
BP11
QN34
BT15
BT14 EB10
QA40 GQ10
BT17
RA1
BP9
BP1
BP2
BP8
XL20
BT81
HQ9
CA1
X6
F2120Chapter 2 | The heat pump design4
2 The heat pump design

F2120 (2x230V)
LEK
GQ1
AA2
UB1
BT12
EP2
XL1
BT3
XL2
HS1
XL21
BT84
QN1
QN4
RM1
QN2
BP11
QN34
BT15
BT14 EB10
QA40 GQ10
BT17
RA1
BP9
BP1
BP2
BP8
XL20
BT81
HQ9
CA1
X6
5Chapter 2 | The heat pump designF2120

F2120 (3x400V)
LEK
GQ1
AA2
UB1
BT12
EP2
XL1
BT3
XL2
HS1
XL21
BT84
QN1
QN4
RM1
QN2
BP11
QN34
BT15
BT14 EB10
QA40 GQ10
BT17
RF2RA1
BP9
BP1
BP2
BP8
XL20
BT81
HQ9
F2120Chapter 2 | The heat pump design6

LEK
Data
Serie.nr.
Art.nr.711453
OUT
IN
PF4
BT16
PF1
BT28
EP1
WM5
XL40
XL1
XL2
PF3
PF3
7Chapter 2 | The heat pump designF2120

Pipe connections
Connection, heating medium out of F2120XL1
Connection, heating medium in to F2120,XL2
Service connection, high pressureXL20
Service connection, low pressureXL21
Connection, drain condensation water troughXL40
Sensors etc.
High pressure pressostatBP1
Low pressure pressostatBP2
Low pressure transmitterBP8
High pressure sensorBP9
Pressure sensor, injectionBP11
Temperature sensor, returnBT3
Temperature sensor, condenser supply lineBT12
Temperature sensor, hot gasBT14
Temperature sensor, fluid pipeBT15
Temperature sensor, evaporatorBT16
Temperature sensor, suction gasBT17
Temperature sensor, ambientBT28
Temperature sensor, injection, EVI compressorBT81
Temperature sensor, suction gas evaporatorBT84
Electrical components
Base cardAA2
Capacitor (1x230V)CA1
Capacitor (2x230V)CA1
Compressor heaterEB10
FanGQ1
InverterQA40
Harmonic filter (3x400V)RA1
Choke (1x230V)RA1
Choke (2x230V)RA1
EMC filter (3x400V)RF2
Terminal block (1x230V)X6
Terminal block (2x230V)X6
Cooling components
EvaporatorEP1
CondenserEP2
CompressorGQ10
Particle filterHQ9
Drying filterHS1
Expansion valveQN1
Bypass valveQN4
4-way valveQN2
Expansion valve, subcoolingQN34
Non-return valveRM1
Miscellaneous
Type platePF1
Serial numberPF3
Sign, pipe connectionsPF4
Cable gland, incoming supplyUB1
Condensation water troughWM5
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
F2120Chapter 2 | The heat pump design8

Distribution box
LEK
AA2 FC1
X24 F5 F4 X7 F2 F1
S2
S1
X23
X22
X21
X28 X27 F3 X2 X1 X5
X9
S3
Electrical components
Base cardAA2
Terminal block, incoming supplyX1
Terminal block, compressor supplyX2
Terminal block, external control voltageX5
Terminal block, 230V~X7
Terminal block, connection KVRX9
Terminal block, Compressor blocking,
Tariff
X21
Terminal block, communicationsX22
Terminal block, communicationsX23
Terminal block, fanX24
Terminal block, expansion valve QN1X27
Terminal block, subcooling QN34X28
Fuse, operating 230V~F1
Fuse, operating 230V~F2
Fuse for external heating cable KVRF3
Fuse, fanF4
Fuse, fanF5
Miniature circuit breaker (Replaced with automat-
ic protection (FB1) when installing accessory
KVR 10.)
FC1
DIP switch, addressing heat pump during multi
operation
S1
DIP switch, different optionsS2
Reset buttonS3
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
9Chapter 2 | The heat pump designF2120

Principle of operation
Drip tray heater
Fan
Inverter cooler
Subcooler,
cooling
operation
Solenoid
valve
QN4
Particle filter
HQ9
EEV 1
QN1
Non-return
valve
RM1
Subcooler
BT16
BT28
BT84
M
BT17
BP8
BP2
BP9
BP1
4-way valve
QN2
BP11
BT28
EEV 2
QN34
BT14
BT15
Flow pipe
Return pipe
Drying
filter
HS1
BT3
BT12
Condenser,
EP2
Evaporator,
EP1 Compressor
GQ10
InformationDesigna-
tion
InformationDesigna-
tion
EvaporatorEP1High pressure switch (45 bar)BP1
CondenserEP2Low pressure switch (1.2 bar)BP2
CompressorGQ10Low pressure transmitterBP8
Drying filterHS1High pressure sensorBP9
Fan motorMPressure sensor, injectionBP11
Expansion valveQN1Temperature sensor, returnBT3
4-way valveQN2Temperature sensor, condenser supply lineBT12
Shut off valveQN4Temperature sensor, hot gasBT14
Expansion valve, subcoolerQN34Temperature sensor, fluid pipeBT15
Non-return valveRM1Temperature sensor, evaporator inBT16
Condensation water trough heaterTemperature sensor, suction gasBT17
Inverter coolerTemperature sensor, ambientBT28
SubcoolerTemperature sensor, injectionBT81
Particle filterHQ9Temperature sensor, suction gas evaporatorBT84
Subcooler, cooling operation
F2120Chapter 3 | System description10
3 System description

System diagram
F2120 – docking step-controlled additional heat before reversing valve for hot water and
cooling function (4 pipe system)
-FL2
-CM1
-EB101
-QM1
-BT3
-BT12 -QM31
-GP12
-BT1
-AA25
-AA25
-AA25
-BT50
-AA25
-BT63
-KA1
-EB1
-FL10
-QZ2
-RN10
-CP10
-AA25-QN10
-AA25-BT7
-AA25-BT6
-GP13
-CP6
-BT64
-EQ1-QN12
-EQ1
-EB1
NOTE
NIBE does not supply all components in this outline diagram.
SMO20/40 (AA25) starts and stops the heat pump (F2120) to meet the heat and hot water demand of the installation.
At simultaneous heating and hot water demand, the reversing valve (AA25-QN10) switches periodically between
the climate system and the water heater/accumulator tank (CP10). When the hot water heater/accumulator tank
is fully charged (CP10), the reversing valve (AA25-QN10) switches to the climate system.
Additional heat (EB1) is connected automatically when the power demand for the installation exceeds the heat
pump capacity. This is used for both heating and charging hot water.
The additional heat can also be used if a higher temperature in the hot water is required than the heat pump can
produce.
11Chapter 3 | System descriptionF2120

F2120 – docking step-controlled additional heat after reversing valve for hot water and cooling
function (4 pipe system)
-EB20
-KA1
-FL2
-CM1
-EB101
-QM1
-QM31
-GP12
-BT1
-AA25
-AA25 -AA25
-FL10
-BT3
-BT12
-AA25 -QZ2
-RN10
-CP10
-AA25-QN10
-AA25-BT7
-AA25-BT6
-BT25
-EB1
-CP5
-GP10
-KA1
-BT71
-EB1
-AA25
-GP13
-CP6
-BT64
-EQ1-QN12
-EQ1
-BT50
This installations alternative is suitable for more complex installations with a focus on comfort.
SMO20/40 (AA25) starts and stops the heat pump (F2120) to meet the heat and hot water demand of the installation.
The heat pump works to a calculated set point value on the supply line. At simultaneous heating and hot water
demand, the reversing valve (AA25-QN10) switches periodically between the climate system and the water heat-
er/accumulator tank (CP10). The heat pump prioritises hot water charging. When the water heater/accumulator
tank (CP10) is fully charged, the reversing valve (AA25-QN10) switches to the climate systems and pool (pool only
possible with SMO40)). When the pool needs heating, the reversing valve (CL11-QN19) switches from the climate
system to the pool system (applies to SMO40). Additional heat (EB1) is connected automatically when the energy
demand for the installation exceeds the heat pump capacity. Immersion heater (EB20) in the water heater/accumu-
lator tank (CP10) is used in the meantime to produce hot water, if the heat pump (EB101) is being used at the same
time to heat the building. The immersion heater (EB20) can also be used if a higher temperature of hot water is re-
quired than the heat pump can produce.
Ensure that the minimum permitted defrosting flow is achieved. F2120 will initially defrost towards the heating
system. If heating is blocked or there is insufficient energy, defrosting will take place towards hot water if it is activated.
Caution
During cooling:
The shared pipework up to the cooling reversing valve needs to be insulated in the event of alternating
heating/cooling operation.
In the event of a hot water demand, hot water is used until cooling is permitted again in order to minimise
condensation.
F2120Chapter 3 | System description12

Installation requirements heating medium
20 kW16 kW12 kW8 kW
0.05/0.45
0.5/4.5
0.05/0.45
0.5/4.5
MPa
Bar
Min/Max system pressure heating
medium
0.190.150.110.08l/sMin flow
0.750.600.440.32l/sMax flow
3.02.01.11.1kPaInternal pressure drop at 10 K flow
Pressure drop, heating medium side
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
00,05 0,1 0,15 0,2 0,25 0,3 0,35 0,4 0,45 0,5 0,55 0,6 0,65 0,7 0,75 0,8 0,85 0,9
Tryckfall [kPa]
Flöde [l/s]
Tryckfall F2120
Pressure drop (kPa)
Flow (l/s)
-8
-12/-16/-20
13Chapter 3 | System descriptionF2120

Compressor (GQ10)
Used inMax operating
current
Winding resistance (at 20 °C)TypeManufacturer and model
F2120-817 A0.68 ΩScrollCopeland ZHW015
F2120-12
F2120-1633 A0.20 ΩScrollCopeland ZHW030
F2120-20
Inverter
The inverter's Status-LED indicates acc. to the table below:
StatusStatus LED
The compressor stopped, OKGreen, steady
The compressor stopped, OKGreen, flashing
Compressor is operational, OKOrange, steady
AlarmRed, steady
Broken circuit on terminal block X4Red, flashing
The inverter’s power LED lights orange continuously when the inverter is powered. (Applies only to F2120-16 and
20)
Used inInverter sizeVoltage
F2120-82.91x230 V
F2120-124.4
F2120-8
F2120-12
5.53x400 V
F2120-16
F2120-20
7.5
U
X2
V W
NL
X1
X5
PFC
Coil1 2
UN
LEK
3-phase inverter
1-phase inverter
Power-LED
Status LED
F2120Chapter 4 | Component description14
4 Component description

The base board
Reset S3
Dip switch S1
EVI
EEV
Fuse
Tariff
Inverter
Fan
Fuses, T4
Supply circuit board
Fuses, T4
K1 QN2
K2 EB10
K3 QN4
K4 KVR10
LED
Dip switch S2
LED K1-K4
15Chapter 4 | Component descriptionF2120

Base board AA2
The base board (AA2) has six status LEDs for easy control
and fault tracing.
ExplanationStateLED
Control board without
power
Not litPWR
(green) Control board power onContinuous
light
CPU without power
CPU running
CPU running incorrectly
Not lit
Flashes
Continuous
light
CPU
(green)
No communication with in-
door module/control mod-
ule
Not litEXT COM
(green)
Communication with indoor
module/control module
Flashes
No communication with in-
verter
Not litINT COM
(green) Communication with invert-
er
Flashes
No defrosting or protection
active
Not litDEFROST
(green) Some protection is activeFlashes
Defrosting in progressContinuous
light
No errorsNot litERROR
(red) Infoalarm (temporary), act-
ive
Flashes
Continuous alarm, activeContinuous
light
Relay in de-energised posi-
tion
Not litK1, K2, K3,
K4, K5
Relay engagedContinuous
light
No functionN-RELAY
No functionCOMPR. ON
Configuration using dip switch
On the base board (AA2) select the communication ad-
dress for F2120 against the indoor module / control
module. DIP-switch S1 used for configuration of address
and functions. For cascade operation with SMO for ex-
ample, addressing is required. Default has F2120 address
1. In a cascade connection all F2120 must have a unique
address. The address is coded in binary.
The dip switches are entered at start-up and therefore
have to be adjusted when the installation is switched
off.
Factory set-
ting
Address
(com)
SlaveDIP S1 position
(1/2/3)
OFF01Slave 1off / off / off
02Slave 2on / off / off
03Slave 3off / on / off
04Slave 4on / on / off
05Slave 5off / off / on
06Slave 6on / off / on
07Slave 7off / on / on
08Slave 8on / on / on
Default set-
ting
FunctionSettingDIP S1:
OFFPermits cool-
ing
ON4
F2120Chapter 4 | Component description16

Relay test
The relay test is solely for troubleshooting base boards
or components in the cooling circuit. The function is
controlled via a dip switch.
The dip switches are entered at start-up and therefore
have to be adjusted when the installation is switched
off.
By setting switch S2:1 in position ON, all operation is
blocked and all relays are set in turn in position ON for
10 seconds followed by 1 second in OFF.
The function is stopped when S2:1 is entered as OFF
when starting the installation. The function requires
software version 447 or higher in F2120.
Default settingOutputFunctionRelayDIP
S2:
OFFAA2-X8:1-2QN2K11
AA2-X8:4-5EB10K2
AA2-X8:7-8QN4K3
AA2-X8:9KVR10K4
Draining cooling circuit
This function must be used if the cooling circuit needs
to be drained. It opens valves that are normally closed
in order to facilitate draining of the entire cooling circuit.
The function is controlled by setting switch S2:2 in posi-
tion ON. The compressor is switched off and blocked in
this position.
QN1 and QN34 is opened fully and QN4 is opened. The
dip switches are entered at start-up and therefore have
to be adjusted when the installation is switched off.
The function is stopped when S2:2 is entered as OFF
when starting the installation. The function requires
software version 447 or higher in F2120.
Default settingOutputFunctionRelayDIP
S2:
OFFAA2-X27QN1Step2
AA2-X28QN34Step
AA2-X8:7-8QN4K3
FunctionDIP S2:
No function3 and 4
ResetS3
Base board’s contacts
PRESS
1
PULL
LEK
23
Pull up!
Push down!
1 2 3
17Chapter 4 | Component descriptionF2120

Electronic expansion valve
QN1 (EEV)
Used inTypeDesignationSupplier
F2120-8ETS6-14EEV 034G5010Danfoss
F2120-12
F2120-16ETS6-18EEV 034G5070
F2120-20
QN34 (EVI)
Used inTypeDesignationSupplier
F2120-8ETS6-10EEV 034G5000Danfoss
F2120-12
F2120-16ETS6-14EEV 034G5010
F2120-20
Other components
DescriptionComponent
0-20 barLow pressure sensor (BP8)
0-46 barHigh pressure sensor (BP9)
0-30 barPressure sensor, injection (BP11)
DescriptionComponent
Breaking value: 45 barHigh pressure switch (BP1)
Reconnection differential: -7 bar
Breaking value: 1.2 barLow pressure switch (BP2)
Reconnection differential: 0.7 bar
VoltageOutputComponent
230 V2x35 WCompressor heater (EB10)
VoltageFuseOutputResistorComponent
230 VT100mA15 W3527 ΩKVR 10-10 (EB14)
230 VT250mA45 W1175 ΩKVR 10-30 (EB14)
230 VT500mA90 W588 ΩKVR 10-60 (EB14)
F2120Chapter 4 | Component description18

Sensor placement
Data for temperature sensor return line (BT3),
condenser supply (BT12), fluid pipe (BT15)
and injection (BT81)
Voltage (VDC)Resistance
(kOhm)
Temperature
(°C)
3.256351.0-40
3.240251.6-35
3.218182.5-30
3.189133.8-25
3.15099.22-20
3.10574.32-15
3.04756.20-10
2.97642.89-5
2.88933.020
2.78925.615
2.67320.0210
2.54115.7715
2.39912.5120
2.24510.0025
2.0838.04530
1.9166.51435
1.7525.30640
1.5874.34845
1.4263.58350
1.2782.96855
1.1362.46760
1.0072.06865
0.8911.73970
0.7851.46975
0.6911.24680
0.6071.06185
0.5330.90890
0.4690.77995
0.4140.672100
Data for hot gas sensor (BT14)
Voltage (V)Resistance
(kOhm)
Temperature
(°C)
4.81118.740
4.7796.1345
4.7278.3050
4.6664.1155
4.5952.7660
4.5143.6465
4.4336.2670
4.3330.2775
4.2225.3880
4.1021.3785
3.9718.0790
3.8315.3395
3.6813.06100
3.5211.17105
3.369.59110
3.198.26115
3.017.13120
2.846.18125
2.675.37130
2.504.69135
2.334.10140
19Chapter 4 | Component descriptionF2120

Data for evaporator sensor (BT16), ambient
sensor (BT28), suction gas sensor (BT17) and
suction gas, evaporator (BT84)
Voltage (VDC)Resistance
(kOhm)
Temperature
(°C)
4.7177.58-50
4.6257.69-45
4.5143.34-40
4.3732.87-35
4.2125.17-30
4.0319.43-25
3.8215.13-20
3.5811.88-15
3.339.392-10
3.077.481-5
2.806.0000
2.544.8445
2.283.93510
2.033.21715
1.802.64420
1.592.18625
1.391.81730
1.221.51835
1.071.27440
0.931.07545
0.810.91150
0.710.77555
0.620.66260
0.540.56865
0.470.49070
0.410.423375
0.360.36780
0.320.32085
0.280.28090
0.250.24595
0.220.216100
F2120Chapter 4 | Component description20