Nibe F1126 Service Manual
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Nibe F1126 Service Manual

Ground source heat pump
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Service manual
NIBE F1126
Ground source heat pump
SEM EN 1737-1
431583

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Summary of Contents for Nibe F1126

  • Page 1 Service manual NIBE F1126 Ground source heat pump SEM EN 1737-1 431583...

  • Page 3: Table Of Contents

    Function check, relays/components 7 Component replacement Basic Main components Circuit board and electronics Temperature sensor 8 Technical specifications Dimensions and setting-out coordinates 3x400 V Miscellaneous Working range heat pump, compressor opera- tion Item register NIBE F1126 Table of Contents |...

  • Page 4: Important Information

    1 Important information Document information This technical manual is a complement to the Installer handbook for F1126, containing: Description of functions and component description. ■ Information to facilitate fault-tracing. ■ Instructions for replacing components. ■ Wiring diagram. ■ Supplementary technical information.

  • Page 5: The Heat Pump Design

    Immersion heater Switch Miscellaneous Rating plate Type plate, cooling section Cable gland, incoming electricity Cable gland Cable gland, rear side, sensor Designations in component locations according to standard IEC 81346-1 and 81346-2. NIBE F1126 Chapter 2 | The heat pump design...
  • Page 6 Base card Miniature circuit-breaker Motor cut-out* Temperature limiter/Emergency mode thermostat Terminal block * 5 kW has auxiliary switch for motor cut-out. Designations in component locations according to standard IEC 81346-1 and 81346-2. Chapter 2 | The heat pump design NIBE F1126...
  • Page 7 * 5 kW has auxiliary switch for motor protection breaker. Designations in component locations according to AA10 standard IEC 81346-1 and 81346-2. Cooling section 5 - 8 kW BT12 BT10 AA100 BT11 NIBE F1126 Chapter 2 | The heat pump design...
  • Page 8 BT17 GQ10 Drying filter Expansion valve BT14 Designations in component locations according to standard IEC 81346-1 and 81346-2. BT15 XL21 XL20 EB10 12 kW GQ10 BT14 BT17 BT15 XL21 EB10 XL20 Chapter 2 | The heat pump design NIBE F1126...

  • Page 9: System Description Principle Of Operation

    Shut-off valve, heating medium flow QM 32 Shut off valve, heating medium return QM 33 Shut off valve, brine out QM 34 Shut-off valve, brine in QN 10 Shuttle valve, climate system/water heater NIBE F1126 Chapter 3 | System description...
  • Page 10 Externally on the flow line to the heat- Calculation of DM. If BT25 is connected. ing system. BT50* Room sensor In suitable indoor location. Correction of the indoor temperature. * Externally mounted (not included in outline diagram). Chapter 3 | System description NIBE F1126...

  • Page 11: System Diagram

    -EP12 F11XX Function The heat pump prioritises hot water charging. The circulation pump GP1 runs at a set speed. More system principles are on www.nibe.eu. Refer to the Installer manual for description of possible docking alternatives. NIBE F1126 Chapter 3 |...
  • Page 12 11/12 kW Max system pressure Min flow 0,22 0,30 0,43 Nominal flow 0,30 0,42 0,64 Max external available pressure at nom flow Max/min incoming temperature °C See diagram page 56. Min outgoing temperature °C Chapter 3 | System description NIBE F1126...

  • Page 13: Cooling Circuit

    Tripped motor protection is reset manually on the motor protection breaker. F1126 Setting 6 kW 4.0 A 8 kW 6.0 A 12 kW 9.0 A If two phases are missing this is indicated as a motor protection alarm. NIBE F1126 Chapter 4 | Cooling circuit...

  • Page 14: Expansion Valve

    30 - 55 °C and the brine in is -5 - +15 °C. F1126 superheat 6 kW 4 - 6 °C 8 kW 4 - 6 °C 12 kW 4 - 6 °C Chapter 4 | Cooling circuit NIBE F1126...

  • Page 15: Component Description

    Compressor (GQ10) 3 x 400 V Size (kW) Type Resistance range (Ω at 20 °C +/- 10 %) W-V[C-R] W-U[C-S] U-V[S-R] Piston 5.19 5.19 5.19 Piston 3.56 3.56 3.56 Scroll 3.64 3.64 3.64 NIBE F1126 Chapter 5 | Component description...

  • Page 16: Other Components

    Actuator motor: 7 VA, 230/24 VAC, 50 Hz, IP 40. Running time approx 8 seconds Max. operating pressure: 1.0 MPa Operating temperature: 5 - 80 °C (90 °C briefly) From September 2012 Ø28 Ø28 Before September 2012 Ø28 Ø28 Chapter 5 | Component description NIBE F1126...
  • Page 17 Up until 14/12/2015 Motor: 1x230 VAC, 50 Hz Max. output: 80 W Ø1½ 11 kW Max flow: 7.0 m Max lift height: 8.0 m Motor: 1x230 VAC, 50 Hz Max. output: 140 W Ø1½ NIBE F1126 Chapter 5 | Component description...
  • Page 18 6 - 12 kW (GP1) Max flow: 3.5 m Max lift height: 7.5 m From 15/12/2015 Motor: 1x230 VAC, 50 Hz Max. output: 80 W Control signal: PWM 0-10 V DC (max-min speed) Ø28 Chapter 5 | Component description NIBE F1126...
  • Page 19 Max lift height: 8.0 m Motor: 1x230 VAC, 50 Hz Max. output: 140 W Ø1½ 11 kW Max flow: 11.0 m Max lift height: 10.0 m Motor: 1x230 VAC, 50 Hz Max. output: 250 W Ø1½ NIBE F1126 Chapter 5 | Component description...
  • Page 20 High pressure switch (BP1) Breaking value: 29 bar Reconnection differential: -7 bar Low pressure switch (BP2) Breaking value: 1.5 bar Reconnection differential: 1.5 bar Compressor heater Output (5-10): 30 W Capacity (12): 40 W Chapter 5 | Component description NIBE F1126...

  • Page 21: Sensors

    1.752 Immersion heater 2 kW 4.348 1.587 3.583 1.426 Immersion heater 1/3 kW 2.968 1.278 2.467 1.136 2.068 1.007 1.739 0.891 1.469 0.785 1.246 0.691 1.061 0.607 0.908 0.533 0.779 0.469 0.672 0.414 NIBE F1126 Chapter 5 | Component description...
  • Page 22 HM pump (GP1) Compressor heater (EB10) (inverted signal) Expansion card (AA7) Indication K1 - K3: Or- A steady light means that the relevant relay ange is engaged. Output Function Alarm Groundwater pump Hot water circulation Chapter 5 | Component description NIBE F1126...

  • Page 23: Troubleshooting

    160 V for 30 min. Compressor phase 2 missing Compressor phase 3 missing Incorrect phase The phases are connected Compressor blocked. Reconnect the phase se- sequence in the wrong order. quence for incoming electri- city. NIBE F1126 Chapter 6 | Troubleshooting...
  • Page 24 34. ing for 15 seconds. Perm. com. fault Communication with the Compressor blocked. See fault-tracing schedule soft-start card soft-start board has been page 35. missing for 15 seconds. Chapter 6 | Troubleshooting NIBE F1126...
  • Page 25 - See also the troubleshooting schedule on page 30 for alarm ■ Sensor fault Sensor temporarily missing Only information The sensor and its connec- BT12 tions. - See also the troubleshooting schedule on page 30 for alarm NIBE F1126 Chapter 6 | Troubleshooting...
  • Page 26 ■ High condenser Condenser out has reached Settings max permitted temperature ■ High condenser Condenser out has reached Resets automatically when Settings out temperature max permitted temperature condenser in has fallen two degrees Chapter 6 | Troubleshooting NIBE F1126...
  • Page 27 Additional heat is externally Additional heat is blocked Check any external connec- blocked via AUX input. tion functions. ■ Blocked Additional heat is externally Compressor is blocked Check any external connec- blocked via AUX input. tion functions. NIBE F1126 Chapter 6 | Troubleshooting...

  • Page 28: Troubleshooting Guide

    Are the characteristics for the sensor OK? Measured from the connected sensor cable on Check wiring and switches. terminal block X1? (See "Temperature sensor" section.) Defective Base card (AA2). Replace the Base card. Chapter 6 | Troubleshooting NIBE F1126...
  • Page 29 Check wiring and switches. (AA2)? (See section “Electrical wiring diagram in IHB”.) Is the output voltage from the card Check wiring and switches. correct? (See "Data for temperature sensor" section.) Defective base card (AA2). Replace. NIBE F1126 Chapter 6 | Troubleshooting...
  • Page 30 Defective joint card (AA100). base board (AA2)? Replace. (See Electrical wiring diagram in IHB) Is the output voltage from the card correct? (See "Data for Check wiring and switches. temperature sensor" section.) Defective base card (AA2). Replace. Chapter 6 | Troubleshooting NIBE F1126...
  • Page 31 -QA40-X4? Does the pressure switch break at the Action. correct pressure? Are the supply temperature sensor (BT2 ) and return line sensor (BT3 ) Action. showing the correct readings? Check cooling circuit. NIBE F1126 Chapter 6 | Troubleshooting...
  • Page 32 Is the pressure switch Action. correctly connected? Does the pressure switch Action. break at the correct pressure? Action. Is the refrigerant circuit intact? Lack of heating medium or other fault in the cooling circuit. Check cooling circuit. Chapter 6 | Troubleshooting NIBE F1126...
  • Page 33 Can the overheat protection be reset when the temperature is Replace overheating protection. below 80 °C? Is the heating medium flow across Action. the heat pump correct? Check the relay function for the immersion heater. NIBE F1126 Chapter 6 | Troubleshooting...
  • Page 34 Is the wiring connector (W105) correctly connected on the base Action. board (AA2-X5) and on the display board (AA4-X1)? Replace the base card (AA2). Has the fault been corrected? Replace the display card (AA4). Chapter 6 | Troubleshooting NIBE F1126...
  • Page 35 Action. (AA10-X5) and on the input card (AA2-X9)? Check the soft start card: Is power lit green? Replace the base card (AA2). Does com flash once/sec? Replace the soft start card (AA10). NIBE F1126 Chapter 6 | Troubleshooting...

  • Page 36: Function Check, Relays/Components

    Immersion heater 3 kW on K9 AA1-K8 Immersion heater 2 kW AA1-K9 Immersion heater 1/3 kW Expansion card (EXC 40) Output Function AA7 - K1 Alarm AA7 - K2 Groundwater pump AA7 - K3 Hot water circulation Chapter 6 | Troubleshooting NIBE F1126...

  • Page 37: Component Replacement

    Cut the current with the circuit breaker before carrying out any servicing. F1126 can contain liquids at high temperature and under high pressure. When replacing components on F1126 only re- placement parts from NIBE may be used.
  • Page 38 Disconnect the connectors (A) and (B) from the un- derside of the base card cabinet. Disconnect the connector (C) from the immersion heater circuit board (AA1) using a screwdriver. Disconnect the connector (D) from the joint circuit board (AA100). Chapter 7 | Component replacement NIBE F1126...
  • Page 39 Removing the cover, terminal block 1. Unscrew the screws and angle out the cover. 2. Unscrew the screws and angle out the cover. 2. Pull off the cover. 3. Pull off the cover. NIBE F1126 Chapter 7 | Component replacement...

  • Page 40: Main Components

    3 Slacken off 10 screws. 4 Remove the cover on the cooling module. 5 Slacken off 6 screws. 6 Remove the right/rear side panel on the cooling mod- ule. Chapter 7 | Component replacement NIBE F1126...
  • Page 41 8 Remove the left/rear side panel on the cooling mod- ule. 9 Unscrew the ground cable. 10 Disconnect the com- Ground cable pressor cables. 11 Remove the 4 locking plates holding the com- pressor. Securing plate NIBE F1126 Chapter 7 | Component replacement...
  • Page 42 12 Drain the cooling circuit Suction gas and ensure that no refriger- ant remains before you con- tinue. 13 Disconnect the pipes for suction gas and hot gas. 14 Remove the compressor. Discharge Chapter 7 | Component replacement NIBE F1126...
  • Page 43 3 Slacken off 10 screws. 4 Remove the cover on the cooling module. 5 Slacken off 6 screws. 6 Remove the right/rear side panel on the cooling mod- ule. NIBE F1126 Chapter 7 | Component replacement...
  • Page 44 7 Drain the cooling circuit and ensure that no refriger- ant remains before you con- Bulb tinue. 8 Slacken off the bulb for the expansion valve. 9 Disconnect the pipes and remove the valve. Expansion valve (QN1) Chapter 7 | Component replacement NIBE F1126...
  • Page 45 2 Remove the electrical con- nection from its mountings using a screwdriver and pull out the electrical connector. Mountings Screwdriver 3 Disconnect the two cables through the cover in front of (AA2). Cables NIBE F1126 Chapter 7 | Component replacement...
  • Page 46 X3 and X7 on (AA1). 7 Pull out the two bulbs from the immersion heater. 8 Disconnect the immersion heater at the marked coup- lings. 9 Remove the immersion heater. Connections Chapter 7 | Component replacement NIBE F1126...
  • Page 47 Reversing valve (QN10) 1 Drain the heating medium system. 2 Remove the switch on the actuator. 3 Remove the pin and re- move the actuator. Contact 4 Disconnect and remove the three way valve. Connections NIBE F1126 Chapter 7 | Component replacement...
  • Page 48 Joint card board for GP1. 7 Release the pressure by carefully opening the connec- tions to the circulation pump. 8 Disconnect and remove the Connections Control connector circulation pump. Electrical switch Chapter 7 | Component replacement NIBE F1126...
  • Page 49 5 Remove the switch on the circulation pump. 6 Disconnect the connector the control cable on the joint Joint card board for GP2. 7 Disconnect and remove the circulation pump. Connections Control connector Electrical switch NIBE F1126 Chapter 7 | Component replacement...

  • Page 50: Circuit Board And Electronics

    Immersion heater card (AA1) 1 Remove the plastic cover over the electronic box using a screwdriver. 2 Disconnect the cables and screws holding the card in position. Screw 3 Remove the immersion heater card (.AA1). Chapter 7 | Component replacement NIBE F1126...
  • Page 51 Cables 2 Remove the plastic cover over the electronic box using a screwdriver. 3 Disconnect the cables and screws holding the card in position. 4 Remove the base card Screw (AA2). NIBE F1126 Chapter 7 | Component replacement...
  • Page 52 3 Remove the display unit. Electrical switch Soft-start card (AA10) 1 Remove the two screws in the motor module. 2 Open the motor module. 3 Disconnect all cables. 4 Replace the card Screws Chapter 7 | Component replacement NIBE F1126...

  • Page 53: Temperature Sensor

    Temperature sensor Mounting Install the temperature sensor with cable ties with the heat conducting paste and aluminium tape. Then insulate with supplied insulation tape. NIBE F1126 Chapter 7 | Component replacement...

  • Page 54: Technical Specifications Dimensions And Setting-Out Coordinates

    Dimensions and setting-out coordinates * This dimension applies at 90° angle on the brine pipes (side connection). The dimension can vary approx. ±100 mm in height as the brine pipes partially consist of flexible pipes. Chapter 8 | Technical specifications NIBE F1126...

  • Page 55: 3X400 V

    0.05 (0.5 bar) / 0.3 (3 bar) Min flow 0.18 0.22 0.30 0.43 Nominal flow 0.22 0.30 0.42 0.64 Max external avail. press at nom flow Min/Max incoming Brine temp °C see diagram Min. outgoing brine temp. °C NIBE F1126 Chapter 8 | Technical specifications...

  • Page 56: Miscellaneous

    Working range heat pump, compressor operation The compressor provides a supply temperature up to 63 °C, at 0 °C incoming brine temperature, the remainder (up to 70°C) is obtained using the additional heat. 5-8 kW 12 kW Arbetsområde för F1126/F1226 11-12kW. Vattentemperatur Vattentemperatur °C Vattentemperatur °C...

  • Page 57: Item Register

    Base card (AA2), 22 Basic Safety information Accessibility, electrical connection, 39 Marking, 4 Top panel, 37 Serial number, 4 Symbols on F1126, 4 Serial number, 4 Component replacement Service actions Basic Drawing out the cooling module, 37 Accessibility, electrical connection, 39...
  • Page 60 WS name: -Gemensamt WS version: a431 (working edition) Publish date: 2017-10-10 12:04 NIBE AB Sweden Hannabadsvägen 5 Box 14 SE-285 21 Markaryd info@nibe.se www.nibe.eu 431583...

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