Nibe F2120 Series Bedienungsanleitung

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

Low hot water temperature or a lack of hot

water

21Low room temperature

21High room temperature

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.

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

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

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

PF4

BT16

PF1

BT28

EP1

WM5

XL40

XL1

XL2

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

X23

X22

X21

X28 X27 F3 X2 X1 X5

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

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

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

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