Nibe SPLIT ACVM270 Service Manual
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Nibe SPLIT ACVM270 Service Manual

Air/water heat pump
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NIBE SPLIT ACVM270
Air/water heat pump
TEM EN 1740-1
431564

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Summary of Contents for Nibe SPLIT ACVM270

  • Page 1 Service manual NIBE SPLIT ACVM270 Air/water heat pump TEM EN 1740-1 431564...

  • Page 3: Table Of Contents

    Document information Safety information 2 The heat pump design Component positions 3 System description General Sensor placement 4 Component description NIBE SPLIT ACVM270 5 Troubleshooting Alarm list Troubleshooting guide Troubleshooting circulation pumps Function check, components 6 Component replacement Removing the covers...

  • Page 4: Important Information

    1 Important information Symbols Document information This technical manual is a complement to the Installer NOTE handbook for NIBE SPLIT ACVM270, containing: This symbol indicates danger to person or ma- Component description. ■ chine . Information to facilitate fault-tracing. ■...

  • Page 5: The Heat Pump Design Component Positions

    2 The heat pump design Component positions XL15 XL13 XL14 QM20 QM32 QM60 QM24 BT67 BT66 BT15 QM30 QM31 QN11 QA10 AA22-R26 AA22-R25 AA22-R24 AA22 AA21 BT30 AA23 BT24 BT19 NIBE SPLIT ACVM270 Chapter 2 | The heat pump design...
  • Page 6 Serial number plate tion Sign, pipe connections Terminal block, external addition Switch Miniature circuit breaker, control system Miniature circuit breaker, outdoor unit Immersion heater Component location according to IEC 62400. Chapter 2 | The heat pump design NIBE SPLIT ACVM270...

  • Page 7: System Description

    Max pressure, climate system 0.25 MPa (2.5 Bar) Highest recommended supply/return temperature at dimensioned 55/45 °C outdoor temperature Max temperature in NIBE SPLIT ACVM270 +65 °C Max flow line temperature with compressor +58 °C Min supply temperature cooling +7 °C Max supply temp.
  • Page 8 Explanation NIBE SPLIT ACVM270 External Temperature sensor, outdoor (external) QN11 Shunt valve Temperature sensor, flow pipe QN12 Shuttle valve Temperature sensor, return Non-return valve Temperature sensor, hot water Expansion vessel BT12 Temperature sensor, condenser out EP21 Shunt group 2 BT15...
  • Page 9 If the compressor does not manage the entire heat de- mand, the addition is connected and the heat shunted out on the flow line. Heating mode QM30 Closed QM31 Open QN11 Active during balance point (A) NIBE SPLIT ACVM270 Chapter 3 | System description...
  • Page 10 The compressor varies the output according to the Installation requirements demand. The charge pump runs at a fixed set speed. See page 7. Heating mode QM30 Closed QM31 Open QN11 Active during balance point (A) Chapter 3 | System description NIBE SPLIT ACVM270...
  • Page 11 The compressor varies the output according to the Installation requirements demand. The charge pump runs at a fixed set speed. See page 7. Heating mode QM30 Closed QM31 Open QN11 Active during balance point (A) NIBE SPLIT ACVM270 Chapter 3 | System description...
  • Page 12 Hot water mode Extra shunt (EP21-QN11) lowers the temperature on QM30 Open system 2 according to settings in NIBE SPLIT ACVM270. If the compressor does not manage the entire heat de- QM31 Closed mand, the addition is connected and the heat shunted out on the flow line.
  • Page 13 Cooling mode QM30 Closed QM31 Open QN11 Open (AB) QN12 Open (B) Installation requirements See page 7. NIBE SPLIT ACVM270 Chapter 3 | System description...
  • Page 14 Hot water mode Extra shunt (EP21-QN11) lowers the temperature on QM30 Open system 2 according to settings in NIBE SPLIT ACVM270. If the compressor does not manage the entire heat de- QM31 Closed mand, the addition is connected and the heat shunted out on the flow line.
  • Page 15 Cooling mode QM30 Closed QM31 Open QN11 Open (AB) QN12 Open (B) Installation requirements See page 7. NIBE SPLIT ACVM270 Chapter 3 | System description...
  • Page 16 By connecting a solar heat collector via intermediate heat exchanger to NIBE SPLIT ACVM270, the solar heat can produce hot water and heating for the house. If the solar panel does not produce the necessary heat, NIBE SPLIT ACVM270 with the compressor or with internal immersion heater heats.
  • Page 17 Menu 9.2.8 set to External Line 1. Alt 1: The gas boiler runs continuously. NIBE SPLIT ACVM270 controls the circulation pump. Alt 2: Condensing gas boiler with internal circulation pump. NIBE SPLIT ACVM270 provides the gas boiler with start and stop signals.
  • Page 18 The addition's control phase is connected to terminal block X3:2 (230V), X3:4 (N) (max 0.4 A). Menu 9.2.8 set to External Line 1. The oil fired boiler is started and stopped by external control. NIBE SPLIT ACVM270 controls the circulation pump. Chapter 3 |...
  • Page 19 10-270 Function By connecting a wood-fired boiler via accumulator tank to NIBE SPLIT ACVM270, hot water and heat to the house can be produced by it. If there is no heat in the accumulator tank, heat and hot water are produced by the heat pump or by the internal immersion heater according to the selected operating mode.
  • Page 20 By connecting F130 to NIBE SPLIT ACVM270, it can produce hot water and heat to the house. If the heat outlet from NIBE SPLIT ACVM270 exceeds F130’s output, heat and hot water are produced by the heat pump or internal immersion heater according to the selected operating mode.

  • Page 21: Sensor Placement

    Tho-S Tho-D Tho- BT19 Tho-R2 AMS 10 ACVM 270 AMS 10-8/AMS 10-12 NIBE SPLIT ACVM270 Temperature sensor, outdoor (external) Temperature sensor, flow pipe Temperature sensor, return Temperature sensor, hot water BT12 Temperature sensor, condenser out BT15 Temperature sensor, fluid pipe...

  • Page 22: Component Description

    4 Component description Wilo (from 2014 until further notice) NIBE SPLIT ACVM270 Dimensions Circulation pump (GP1) General NOTE The pump must not be operated dry, as this damages the bearings extremely quickly. Connection of control signal The connection of the control signal varies depending on the circulation pump.
  • Page 23 Depending on which instrument is used to measure the voltage, there can be deviations from these values. Capacity [%] Voltage, control signal (direct cur- rent) [V] 0 V DC 5 V DC 10 V DC NIBE SPLIT ACVM270 Chapter 4 | Component description...
  • Page 24 9–63 W * Not frozen or condensed Pump diagram Wilo Tillgängligt tryck [kPa] 0,00 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50 0,55 0,60 Flöde [l/s] Pump diagram Xylem (Laing, Lowara) Chapter 4 | Component description NIBE SPLIT ACVM270...
  • Page 25 Reversing valves from 2014 until further notice (QM30, QM31, QN11) Actuator, two-way valve Actuator, three-way valve Installation of actuator NIBE SPLIT ACVM270 Chapter 4 | Component description...
  • Page 26 Dimensions, two-way valve Dimension actuator Two-way valve 6,4 ± 0,1 ISO 228/1-G1 (2x) 44,6 Dimensions, three-way valve 6,4 ± 0,1 108,8 Three-way valve 36,5 108,8 44,6 Chapter 4 | Component description NIBE SPLIT ACVM270...
  • Page 27 AC 100-240 V Frequency 50/60 Hz 50/60 Hz Output 11 W Electrical connections 3 x 0.75 mm 3 x 0.75 mm Run time 12 s / 90 ° 40 s / 90 ° NIBE SPLIT ACVM270 Chapter 4 | Component description...
  • Page 28 A - AB = 100 % A - AB = 0 % (2x) A-AB = 100% *A-AB = 100% O 228/1-G1 * B-A = 100% 42,5 B-A = 100% B-AB = 0% B-AB = 0% Chapter 4 | Component description NIBE SPLIT ACVM270 42,5...
  • Page 29 KVS value Actuator Type LR230A-002 LI Lineg 1 2 3 Voltage AC 100-240 V Frequency 50/60 Hz Output 1.5 W Electrical connections 3 x 0.75 mm Run time 35 s / 90 ° NIBE SPLIT ACVM270 Chapter 4 | Component description...
  • Page 30 When the cooling system has been open for the third ■ time. If a significant component has been replaced, e.g. a ■ compressor, heat exchanger or expansion valve. If the refrigerant circuit has been open for an extended ■ period. Chapter 4 | Component description NIBE SPLIT ACVM270...

  • Page 31: Troubleshooting

    When an alarm has been triggered, it is acknowledged ■ Recurring alarms mean that there is a fault in in menu 9.7 (service menu) by switching NIBE SPLIT ACVM270 off and on using the switch (SF1). Note that the installation.
  • Page 32 Sensor fault, immersion heater (BT19). - Open-circuit or short-circuit on sensor input - Sensor does not work (see "Temperature sensor" section) - The alarm activates output “High priority alarm” and must be reset manually. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 33 Exceeded limit value if the difference in water - When defrost has ended. temperature is too great during tank defrost- - The alarm activates output “Low priority ing. alarm” and is reset automatically. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...

  • Page 34: Troubleshooting Guide

    QA1, QA2 and QA3. Check wiring. 4 - OU power failure Is the voltage supply OK? Action. Has miniature circuit breaker FA2 Action. tripped? Check contactor QA10 and wiring to the outdoor unit. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 35 Action. correctly connected? Check the flow through the heat Does the pressure (external meter) correspond with the value exchanger (EP2) during defrost or displayed in the indoor module? cooling. Replace the pressure transmitter. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 36 10 - High Supply temp. 1, 11 High Supply temp. 2 Is the flow sensor for the relevant Action. system correctly connected? Are the characteristics for the sensor OK? (See "Temperature Defective sensor - replace. sensor" section) Replace the EBV board (AA22). Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 37 Is the pressure transmitter (BP4) Action. correctly connected? Does the pressure (external Check the flow through the heat meter) correspond with the value exchanger (EP2). displayed in the indoor module? Replace the pressure transmitter. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 38 Check the rotational speed of the normal? compressor. Does the temperature (external gauge) correspond with the Defective control board - replace. displayed temperature in the event of an alarm? Too much refrigerant. Action. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 39 E37 - S. fault Tho-R Is the heat exchanger's temperature sensor (Tho-R1, R2) Action. correctly connected? Are the characteristics of the heat exchanger's temperature sensor Defective sensor - replace. (Tho-R1, R2) OK? Replace the control board. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 40 Replace the control board. E39 - S. fault Tho-D Is the hot gas sensor (Tho-D) Action. correctly connected? Are the characteristics of the hot Defective sensor - replace. gas sensor (Tho-D) OK? Replace the control board. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 41 Is there 230 V on contact CNW the heat exchanger correctly on the control board (PWB1) Check fuse (4A) and cable. connected? between red and white cables. - Is the filter blocked? Defective control board - replace. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 42 - Does the compressor sound different than usual? Does the fault disappear if the Replace the inverter board. current is switched off and on several times? Temporary surge on incoming supply may have caused the alarm. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 43 Replace the fan Is the connection between the inverter board and the control Connect signal cable securely board ok? Replace the control board. Has the fault been corrected? Replace the inverter board. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 44 Does the fault remain when the power supply unit is reset? Is IC2 damaged? Does the compressor function? Is the voltage betweenT26 and T27 for 380 - 390 V DC ? Replace the inverter board. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 45 Cut and reset the voltage supply. Replace the fan motor. (If the fault Has the fault been corrected? persists, replace the control board.) Temporary surge on incoming supply may have caused the alarm. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 46 Is the pressure 0 MPa in the Replace the control board. indoor module? Replace the low pressure transmitter. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 47 Defective low pressure transmitter pressure transmitter and sensor or sensor for suction gas for suction gas temperature OK? temperature - replace. Is the low pressure normal during Top up refrigerant. operation? Defective control board - replace. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 48 (CNI3 or 1) has been removed? board and inverter board. Is the voltage DC 15 V at the fan Replace the fan motor. motor's contact? Replace the control board. Has the fault been resolved? Replace inverter board. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 49 Measurement between CNI3:2-3 on the inverter board: AMS 10-8 AMS 10-12/16 GND (-) Remove the surface treatment on the soldered points to be measured. 2: 15 V (+) 3: GND (-) 15V (+) NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 50 E53 - S. fault Tho-S Is the sensor for the suction gas temperature (Tho-S) correctly Action. connected? Are the characteristics for the Replace the sensor. suction gas sensor OK? Replace the control board. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 51 Check the amount of refrigerant. meter) correspond with the value Check the refrigerant circuit. displayed in the indoor module? Replace the low pressure transmitter. Has the fault been corrected? Replace the control board. NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...
  • Page 52 Are the sensors BT15 and BT3 Action. correctly connected? Are the sensor characteristics for Replace defective sensors. BT15 and BT3 correct? Is the low pressure normal during Top up refrigerant. operation? PWB1-circuit board defective. Replace the circuit board Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...
  • Page 53 Try to start several times, Is the voltage supply and winding resistance of the did the compressor start? from the inverter ok?? compressor ok? Replace the inverter Replace the compressor. Replace the compressor. board (PWB2 ). NIBE SPLIT ACVM270 Chapter 5 | Troubleshooting...

  • Page 54: Troubleshooting Circulation Pumps

    Other faults: Problem Cause Action Noise from pump. Air in the system. - Vent the system. Dirt in the pump. - Open and clean the pump. Worn bearings. - Replace the pump. Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...

  • Page 55: Function Check, Components

    Function check, components * In the event of overheating, the pump automatically reduces the voltage (the speed) at 105°C, stopping NIBE SPLIT ACVM270 Relay test - forced completely at 125°C. When the pump has cooled to control 115°C again, it restarts automatically.
  • Page 56 High priority alarm relay -AA22-K1 inactive -AA22 X2:1-2 active -AA22 X2:1-3 Alarm relay Low priority alarm relay -AA22-K2 inactive -AA22 X3:1-2 active -AA22 X3:1-3 Tips Always close forced control in menu 9.3.7.1 after using ■ Chapter 5 | Troubleshooting NIBE SPLIT ACVM270...

  • Page 57: Component Replacement

    6 Component replacement Removing the covers NIBE SPLIT ACVM270 Chapter 6 | Component replacement...

  • Page 58: Technical Data

    7 Technical data Temperature sensor data Data for sensor in NIBE SPLIT ACVM270 Temperature Resistance (kΩ) Voltage (V) (°C) 102.35 4.78 73.51 4.70 53.44 4.60 39.29 4.47 29.20 4.31 21.93 4.12 16.62 3.90 12.71 3.65 9.81 3.38 7.62 3.09 5.97 2.80...

  • Page 59: Dimensions

    Dimensions Indoor module (42) 95 65 52 NIBE SPLIT ACVM270 Chapter 7 | Technical data...

  • Page 60: Technical Specifications

    Technical specifications NIBE SPLIT ACVM270 Immersion heater Max 9 kW Possible electrical step 4 (2, 4, 6, 9 kW) Circulation pump, output 3–45 W (variable speed) Circulation pump, max available pressure 71 kPa (external) Circulation pump, max flow 0.52 l/s Circulation pump, flow at 20 kPa external pressure drop 0.41 l/s...

  • Page 61: Item Register

    Marking, 4 NIBE SPLIT ACVM270, 22 Radiators, 9 Removing the covers, 57 Safety information Marking, 4 Symbols on NIBE SPLIT ACVM270, 4 Service, 31 Component replacement, 57 Function check, components, 55 Troubleshooting guide, 34 Symbols on NIBE SPLIT ACVM270, 4 System description Dual system –...
  • Page 64 WS name: -Gemensamt WS version: a438 (working edition) Publish date: 2017-10-26 15:28 NIBE AB Sweden Hannabadsvägen 5 Box 14 SE-285 21 Markaryd info@nibe.se www.nibe.eu 431564...

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