Nibe F1155 Series User manual

Service manual
LEK
F1155
Ground source heat pump
SEM GB 1716-2
431539

Table of Contents
41 Important information
4Document information
4Safety information
52 The heat pump design
5The heat pump design
103 System description
10Principle of operation
14System diagram
164 Cooling circuit
16Outline diagram
16Compressor control
17Expansion valve
185 Component description
18Compressor (GQ10)
19Other components
22Sensors
23Electronics
266 Troubleshooting
26Alarm list
38Troubleshooting guide
50Function check, relays/components
547 Component replacement
54Basic
57Main components
67Circuit board and electronics
74Temperature sensor
758 Technical specifications
75Dimensions and setting-out coordinates
761x230V
763x230V
773x400V
781x230V, 3x230V and 3x400V
78
Working range heat pump, compressor opera-
tion
78Diagram, dimensioning compressor speed
80Item register
3Table of Contents |F1155

Document information
This technical manual is a complement to the Installer
handbook for F1155, containing:
■Description of functions and component description.
■Information to facilitate fault-tracing.
■Instructions for replacing components.
■Supplementary technical information.
The document applies to heat pumps with software
version 7740R5.
The heat pump software version can be found in the info
menu (menu 3.1).
Safety information
This manual describes installation and service procedures
for implementation by specialists.
This appliance can be used by children
aged from 8 years and above and per-
sons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use
of the appliance in a safe way and under-
stand the hazards involved. Children shall
not play with the appliance. Cleaning
and user maintenance shall not be made
by children without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2017.
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.
IP21
Danger to person or machine.
!
Serial number
The serial number can be found at the bottom right of
the front cover and in the info menu (menu 3.1).
Caution
You need the product's (14 digit) serial number
for servicing and support.
F1155Chapter 1 | Important information4
1 Important information

The heat pump design
General
F1155
UB1
EB1
QM34
QM31
UB2
QM32
QM33
XL1
XL6 XL7
XL2XL9
QN10
PF1
PF2
BT2
UB3
AA4
AA4-XJ3
AA4-XJ4
SF1
W130
RA3
View from behind
BF1
5Chapter 2 | The heat pump designF1155
2 The heat pump design

Pipe connections
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, brine inXL6
Connection, brine outXL7
Connection, hot water heaterXL9
HVAC components
Shut-off valve, heating medium flowQM31
Shut off valve, heating medium returnQM32
Shut off valve, brine outQM33
Shut-off valve, brine inQM34
Shuttle valve, climate system/water heaterQN10
Sensors etc.
Flow meter**BF1
Outdoor temperature sensor*BT1
Temperature sensors, heating medium flowBT2
**Only heat pumps with energy meter
* Not illustrated
Electrical components
Display unitAA4
AA4-XJ3 USB socket
AA4-XJ4 Service outlet (No function)
Immersion heaterEB1
SwitchSF1
Network cable for NIBE UplinkW130
Miscellaneous
Rating platePF1
Type plate, cooling sectionPF2
Cable gland, incoming electricityUB1
Cable glandUB2
Cable gland, rear side, sensorUB3
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
F1155Chapter 2 | The heat pump design6

Distribution boxes
F1255
FD1
AA1
FA1
AA3
AA2AA23
Electrical components
Immersion heater cardAA1
Base cardAA2
Input circuit boardAA3
Communication boardAA23
Miniature circuit-breakerFA1
Temperature limiter/Emergency mode thermostatFD1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
7Chapter 2 | The heat pump designF1155

Cooling section
6 kW
LEK LEK
BT10
AA100
BT3
QM2
GP1
GP2
QM1
BT11
BT12
1x230 V 12 kW
3x230 V 12 kW
LEK
BT10
AA100
BT3
QM2
GP1
GP2
QM1
BT11
BT12
3x400 V 12 kW
LEK
BT11
BT12
AA100
BT10
RF2
BT3
GP2
QM2 QM1
GP1
16 kW
LEK
BT12
RF2
GP1
GP2
QM2
QM1
BT10
AA100
BT11
BT3
6 kW
LEK LEK
EP2
BT14
QA40
BP2
BT15
BP1 EB10
BT17
EP1
GQ10
HS1
XL20
QN1
XL21
RA1
CA1
1x230 V 12 kW
3x230 V 12 kW
LEK
EP2 BT17
QA40
BT15
BP1
BT14
EP1
GQ10
HS1
XL20
QN1
XL21
RA1
CA1 BP2
EB10
3x400 V 12 kW
LEK
EP2
QA40
BT17
BT14
XL21
BT15
BP1
EP1
GQ10
HS1
BP2
XL20
QN1
EB10
3x400 V 16 kW
LEK
EP2
BT14
BT17
QA40
BP2
BT15
BP1
EB10
EP1
GQ10
HS1
XL20
QN1
XL21
F1155Chapter 2 | The heat pump design8

Pipe connections
Service connection, high pressureXL20
Service connection, low pressureXL21
HVAC components
Circulation pumpGP1
Brine pumpGP2
Drainage, climate systemQM1
Draining, brine sideQM2
Sensors etc.
High pressure pressostatBP1
Low pressure pressostatBP2
Temperature sensors, heating medium returnBT3
Temperature sensor, brine inBT10
Temperature sensor, brine outBT11
Temperature sensor, condenser supply lineBT12
Temperature sensor, hot gasBT14
Temperature sensor, fluid pipeBT15
Temperature sensor, suction gasBT17
Electrical components
Joint cardAA100
CapacitorCA1
Compressor heaterEB 10
InverterQA40
ChokeRA1
EMC-filterRF2*
* Only 12 & 16 kW 3X400 V.
Cooling components
EvaporatorEP1
CondenserEP2
CompressorGQ10
Drying filterHS1
Expansion valveQN1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
9Chapter 2 | The heat pump designF1155

Principle of operation
KBinVBf VBrVV KBut
XL1 XL6 XL9 XL7 XL2
BP2
BT3
BT12 BT10
BT17
BT15 BP1 BT11
BT14
EP1
EP2
GQ10
GP2
QM32
QM33
QW1
GP1
QM31
QM34
QN10
List of components
Pipe connections
Connection, heating medium flowXL 1
Connection, heating medium returnXL 2
Connection, brine inXL 6
Connection, brine outXL 7
Connection, hot water heaterXL 9
Cooling components
EvaporatorEP 1
CondenserEP 2
CompressorGQ 10
Expansion valveQN 1
HVAC components
Circulation pumpGP 1
Brine pumpGP 2
Shut-off valve, heating medium flowQM 31
Shut off valve, heating medium returnQM 32
Shut off valve, brine outQM 33
Shut-off valve, brine inQM 34
Shuttle valve, climate system/water heaterQN 10
F1155Chapter 3 | System description10
3 System description

Sensors etc.
Internal
FunctionLocationName
Protects the compressor against pres-
sures that are too high.
On the liquid line.High pressure pressostatBP1
Protects the compressor against pres-
sures that are too low.
On suction gas line.Low pressure pressostatBP2
Set point values for heating and cool-
ing demand calculation. Operating
mode change.
Outdoor, shaded location on north side
of the house.
Outside sensorBT1*
Calculation of DM. If BT25 is installed,
only view.
On supply line after immersion heater
(EB1).
Flow pipeBT2
Stopping the compressor at high tem-
perature.
On return line between circulation
pump (GP1) and condenser (EP2).
Return pipeBT3
Stop and start of hot water charging.On water heater lower section.Hot water, chargingBT6*
Also used for display if BT7 is not in-
stalled.
View.At water heater peak.Hot water, topBT7*
View.On incoming brine line before circula-
tion pump (GP2).
Brine inBT10
Stops compressor at high temperature.
Controls brine pump speed together
with BT11
Stopping the compressor at low tem-
perature.
On outgoing brine line after evaporator
(EP1).
Brine outBT11
Controls brine pump speed together
with BT10
Stopping the compressor at high tem-
perature.
On supply line between condenser
(EP2) and immersion heater (EB1).
Condenser flow lineBT12
Stopping the compressor at high tem-
perature.
On hot gas line after compressor
(GQ10).
DischargeBT14
View.On the liquid line after the condenser
(EP2).
Fluid pipeBT15
View.On suction gas line before the com-
pressor (GQ10).
Suction gasBT17
Calculation of DM. Actual value for ad-
ditional shunt.
Externally on the flow line to the heat-
ing system.
External flow lineBT25*
Correction of the indoor temperature.In suitable indoor location.Room sensorBT50*
* Externally mounted (not included in outline diagram).
11Chapter 3 | System descriptionF1155

External
FunctionLocationName
Stop and start of pool charging.On pool water pipe in heat exchanger.Pool sensorCL11-BT51
In relation to BT54, stop and start of
solar charging.
On the solar panelSolar panel sensorEP30-BT53
In relation to BT53, stop and start of
solar charging.
On solar tank bottomSolar tank, bottomEP30-BT54
Closes additional heat mixing valve
when boiler is cold.
In additional heat boilerBoiler sensorEM1-BT52
Actual value for mixing valve cooling
(EQ1-QN18)
On flow line, coolingFlow line, coolingEQ1-BT64
ViewOn return line, coolingReturn line, coolingEQ1-BT65
Actual value for mixing valve, climate
system 2.
On flow line to extra climate system 2.Flow line, extra climate
system
EP21-BT2
View.On return line from extra climate sys-
tem 2.
Return line, extra climate
system
EP21-BT3
Actual value for mixing valve, climate
system 3.
On flow line to extra climate system 3.Flow line, extra climate
system
EP22-BT2
View.On return line from extra climate sys-
tem 3.
Return line, extra climate
system
EP22-BT3
Actual value for mixing valve, climate
system 4.
On flow line to extra climate system 4.Flow line, extra climate
system
EP23-BT2
View.On return line from extra climate sys-
tem 4.
Return line, extra climate
system
EP23-BT3
Actual value for shunt valve, climate
system 5.
On supply line to extra climate system
5.
Flow line, extra climate
system
EP24-BT2
ViewOn return line from extra climate sys-
tem 5.
Return line, extra climate
system
EP24-BT3
Actual value for shunt valve, climate
system 6.
On supply line to extra climate system
6.
Flow line, extra climate
system
EP25-BT2
ViewOn return line from extra climate sys-
tem 6.
Return line, extra climate
system
EP25-BT3
Actual value for shunt valve, climate
system 7.
On supply line to extra climate system
7.
Flow line, extra climate
system
EP26-BT2
ViewOn return line from extra climate sys-
tem 7.
Return line, extra climate
system
EP26-BT3
Actual value for shunt valve, climate
system 8.
On supply line to extra climate system
8.
Flow line, extra climate
system
EP27-BT2
ViewOn return line from extra climate sys-
tem 8.
Return line, extra climate
system
EP27-BT3
View.In exhaust air in FLM.Exhaust airAZ1-BT20
F1155Chapter 3 | System description12

FunctionLocationName
Controls defrostingIn extract air in FLM.Extract airAZ1-BT21
View.On incoming collector line in FLM.Collector inAZ1-BT26
View.On outgoing collector line in FLM.Collector outAZ1-BT27
13Chapter 3 | System descriptionF1155

System diagram
Heating
-QM31
-QM32
-FL3
-QM42
-QM12
-CM2
-HQ1
-QM34
-XL15
-BT1
-EB100
F11XX
-FL2
-CM1
-BT6
-CP1
-EP12
Function
The heat pump prioritises hot water charging. The circulation pump GP1 runs at a calculated speed. When the water
heater is fully charged QN10 switches to the heating system. The heat pump works to a calculated set point value
on the supply line. If the compressor cannot meet the whole heating requirement, electric heat is shunted in as ne-
cessary.
TIP
More system principles are on www.nibe.eu.
Refer to the Installer manual for description of
possible docking alternatives.
F1155Chapter 3 | System description14

Installation requirements
Heating medium side
16kW12kW6kW
4,5BarMax system pressure
0.150.080.06l/sMin. flow** (50 Hz)
0.220.120.08l/sNominal flow (50 Hz)
0.300.0160.10l/sMax. recommended flow, (50 Hz)
717369kPaMax. external available pressure at nominal flow*** (50 Hz)
See diagram page 78.°CMin/max temperature
* min volume refers to circulating flow
** overflow valve must be used if min flow cannot be guaranteed
*** external circulation pump must be used when the pressure drop in the system is greater than the available ex-
ternal pressure. In such cases, a bypass line with non-return valve must be installed.
Brine side
16kW12kW6kW
4.5BarMax system pressure
0.360.200.13l/sMin. flow (50 Hz)
0.510.290.18l/sNominal flow (50 Hz)
9511564kPaMax. external available pressure at nominal flow (50 Hz)
See diagram page 79.°CMax/min incoming temperature
15Chapter 3 | System descriptionF1155

Outline diagram
Köld-
bärare
Bulb
LP
HP
Förångare
Kompressor
Högtrycks-
pressostat
Vätske-
ledningsgivare
Hetgasgivare
Lågtrycks-
pressostat
Exp.-
ventil
Tork-
filter
Kondensor
Värme-
bärare
Condenser
Evaporator
Brine Heating
medium
Exp. valve
Compressor
Drier
filter
Bulb
Hot gas sensor
High pressure pressostat
Fluid line sensor
Low pressure pressostat
Compressor control
blockFreq
■2x selectable blockFreq (5.1.24) with blocking range
3-50Hz.
RemarksFactory settingsModel
91-120Hz6 kW
-12 kW
-16 kW
Hot gas limit BT 14
16 kW12 kW6 kW
135°C120°C120°CThe com-
pressor is
stopped.
Alarm 55
130°C110°C110°CReduces the
com-
pressor's fre-
quency by 5
Hz/min.
125°C107°C107°CIncrease of
compressor
frequency
blocked >
Return to
free control
of the com-
pressor <
High pressure pressostat
Stop with automatic restart:
■The compressor stops when the pressure is 32 bar, and
restarts automatically when the pressure is below 25
bar.
Stop with manual restart missing.
F1155Chapter 4 | Cooling circuit16
4 Cooling circuit

Reconnection
differential
StopCompressor
-7 bar32 bar16 kW
-7 bar32 bar12 kW
-7 bar32 bar6 kW
Low pressure pressostat
Stop with manual restart:
■The compressor stops when the pressure is below 1.5
bar, and can restart when the pressure is above 3 bar.
The function is blocked for 1 minute after switching
between charging type (HW, heating, pool).
Reconnection
differential
StopCompressor
1.5 bar1.5 bar16 kW
1.5 bar1.5 bar12 kW
1.5 bar1.5 bar6 kW
The function is blocked for 1 minute after switching
between charging type (HW, heating, pool).
Working area
Time conditions
Minimum time between stop and start is 5 min.
Minimum time from start to stop to start is 20 min.
Minimum time to start at start-up/restart is 30 minutes
if hot gas (BT14) - brine out (BT11) is less than 6.5 K (Only
applies to 6 kW / 12 kW).
Compressor heater
The compressor heater is active when relay (K4) on the
base card is in unaffected mode.
When the compressor is inactive and ΔT between hot
gas (BT14) - brine out (BT11) is less than 6.5 K (Only ap-
plies to 6 kW / 12 kW).
When the compressor is inactive, the compressor heater
is always active (only applies to 16 kW).
Expansion valve
Check that overheating occurs by measuring the vapour
temperature with a manometer and the suction gas
temperature with a service thermometer. The suction
gas temperature is measured on the suction pipe at the
entrance to the compressor.
Overheating is shown in the table below and must be
checked when the compressor frequency is 30 - 90 Hz
and when the temperature of the heating medium
supply is 30 - 55 °C and brine in is -5 - +10 °C.
Brine temperatures higher than +10 °C in combination
with high compressor frequency (Hz) can cause greater
overheating.
superheatF1155
4 - 8 °C6 kW
4 - 8 °C12 kW
4 - 8 °C16 kW
17Chapter 4 | Cooling circuitF1155

Compressor (GQ10)
1x230V,3x230V,3x400V
Resistance range (Ω at 20 °C +/- 10 %)TypeSize (kW)
U-V[S-R]W-U[C-S]W-V[C-R]
0.720.720.72Rotation6
0.430.430.43Scroll12
3 x 400 V
Resistance range (Ω at 20 °C +/- 10 %)TypeSize (kW)
U-V[S-R]W-U[C-S]W-V[C-R]
5.195.195.19Scroll16
F1155Chapter 5 | Component description18
5 Component description

Other components
DescriptionComponent
F1255-16,3x400VImmersion heater (EB1)
White coil (1/3 kW), internal resistance: 55 ohm
Brown coils (3 x 2 kW), internal resistance: 27 ohm
F1255-12,1x300V,3x230V,3x400V
Brown coils (3 x 2 kW), internal resistance: 27 ohm
White coil:
■1 x 230 V: (1 kW), internal resistance 55 ohm
■3 x 230 V: (3 kW), internal resistance 18 ohm
■3 x 400 V: (1/3 kW), internal resistance 55 ohm
F1255-6, 1x230V,3x230V,3x400V
White coil (2 kW), internal resistance 27 ohm
Red coil:
■1 x 230 V: (1 kW), internal resistance 55 ohm
■3 X 230 V: (1 kW), internal resistance 55 ohm
■3 x 400 V: (3 kW), internal resistance 55 ohm
Brown coil (1 kW), internal resistance 55 ohm
Black coil (0.5 kW), internal resistance 110 ohm
Actuator motor: 7 VA, 230/24 VAC, 50 Hz, IP 40. Running time approx 8 secondsReversing valve (QN10)
Max. operating pressure: 1.0 MPa
Operating temperature: 5 - 80 °C (90 °C briefly)
56 56 B
30
54
106
142
A
F1255-16F1255-6
Ø28 mmØ22 mmA
Ø28 mmØ22 mmB
19Chapter 5 | Component descriptionF1155

DescriptionComponent
F1255-16Heating medium pump
(GP1) UPM GEO 25-85. Operating voltage 1x230 V, max 70 W
Control signal: PWM 0 - 10 V DC (max-min speed)
Max flow: 8.5 m3/h
Max lift height: 5 m.
G 1⁄ ’’
G 1⁄ ’’
180
145
F1255-12
UPM3 25-75. Operating voltage 1x230 V, max. 60 W
Control signal: PWM 0 - 10 V DC (max-min speed)
Max flow: 5 m3/h
Max lift height: 7 m.
F1255-6
UPM2 25-70. Operating voltage 1x230 V, max 63 W
Control signal: PWM 0 - 10 V DC (max-min speed)
Max flow: 5 m3/h
Max lift height: 7 m.
G 1⁄ ’’
G 1⁄ ’’
180
135,3
109,3
F1155Chapter 5 | Component description20