Bosch Climate 5000 Series Service Manual
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Bosch Climate 5000 Series Service Manual

Ductless air conditioner / heat pump multi zone outdoor units
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Service Manual
Ductless Air Conditioner / Heat Pump
Multi Zone Outdoor Units
Climate 5000 Series
WARNING:
f Installation must be performed by a licensed
contractor, and per the instructions in the
installation manual. Improper installation can
cause water leakage, electrical shock, or fire.
f In North America, installation must
be performed in accordance with the
requirement of NEC (National Electric Code)
and CEC (Canadian Electric Code) by licensed
and qualified personnel only.
f Only contact a licensed contractor for repair
or maintenance of this unit.

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Summary of Contents for Bosch Climate 5000 Series

  • Page 1 Service Manual Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units Climate 5000 Series WARNING: f Installation must be performed by a licensed contractor, and per the instructions in the installation manual. Improper installation can cause water leakage, electrical shock, or fire.
  • Page 2 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)

  • Page 3: Table Of Contents

    5.5 For Model: 36K Multi Zone Max Performance System BMS500-AAM036-1CSXHC 5.6 For Model: 48K Multi Zone Regular System BMS500-AAM048-1CSXRC 5.7 For Model: 48K Multi Zone Max Performance System BMS500-AAM048-1CSXHC Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)

  • Page 4: Key To Symbols And Safety Instructions

    Lead components, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www. P65Warnings.ca.gov. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
  • Page 5 NOTICE: PROPERTY DAMAGE Install condensate drainage piping according to the instructions in this manual. Improper condensate drainage may cause water damage to your home and property. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)

  • Page 6: Part Names And Model Numbers

    9+12 12+12 6+12 6+6+6 6+18 6+6+9 6+6+12 9+12 6+6+18 9+18 6+9+9 12+12 6+9+12 12+18 6+9+18 18+18 6+12+12 6+12+18 9+9+9 9+9+12 9+9+18 9+12+12 12+12+12 Table 3 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
  • Page 7 6+9+9+12 9+9+24 6+9+9+18 9+12+12 6+9+9+24 9+12+18 6+9+12+12 9+12+24 6+9+12+18 9+18+18 6+12+12+12 12+12+12 6+12+12+18 12+12+18 9+9+9+9 12+12+24 9+9+9+12 12+18+18 9+9+9+18 9+9+12+12 9+9+12+18 9+12+12+12 12+12+12+12 Table 4 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
  • Page 8 6+12+12+12+18 9+9+18+24 9+9+9+9+9 9+12+12+12 9+9+9+9+12 9+12+12+18 9+9+9+9+18 9+12+12+24 9+9+9+9+24 9+12+12+30 9+9+9+12+12 9+12+18+18 9+9+9+12+18 9+12+18+24 9+9+9+12+24 12+12+12+12 9+9+12+12+12 12+12+12+18 9+9+12+12+18 12+12+12+24 9+12+12+12+12 12+12+18+18 12+12+12+12+12 Table 5 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)

  • Page 9: Dimensions

    663 (26.1) 354 (13.94) BMS500-AAM018-1CSXHC, BMS500-AAM027-1CSXRC, 946x810x410 (37.24x31.89x16.14) 673 (26.5) 403 (15.87) BMS500-AAM027-1CSXHC, BMS500-AAM036-1CSXRC BMS500-AAM036-1CSXHC, BMS500-AAM048-1CSXRC, 952x1333x415 (37.48x52.48x16.34) 634 (24.96) 404 (15.9) BMS500-AAM048-1CSXHC Table 6 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)

  • Page 10: Refrigerant Cycle Diagrams - Outdoor Models

    4-WAY VALVE T2B-B GAS VALVE B COOLING High pressure Accumulator HEATING T2B-C switch T5 Discharge temp. sensor Low pressure switch Compressor Figure 3 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 1 0 |...

  • Page 11: For Models: 27K Multi Zone Regular, 27K Multi Zone Max Performance System Bms500-Aam027-1Csxrc

    GAS VALVE C COOLING Accumulator High pressure HEATING switch T2B-D GAS VALVE D T5 Discharge temp. sensor Low pressure switch Compressor Figure 5 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 11...

  • Page 12: For Model: 36K Multi Zone Max Performance System

    High pressure GAS VALVE D Accumulator HEATING switch T5 Discharge T2B-E GAS VALVE E Low pressure temp. sensor switch Compressor Figure 7 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 1 2 |...

  • Page 13: For Model: 48K Multi Zone Max Performance System Bms500-Aam048-1Csxhc

    T2B-D High pressure GAS VALVE D Accumulator HEATING switch T5 Discharge T2B-E temp. sensor GAS VALVE E Low pressure switch Compressor Figure 8 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 13...

  • Page 14: Wiring Diagrams

    5.1 For Model: 18K Multi Zone Regular System BMS500-AAM018-1CSXRC Compressor Crankcase Heater Base Pan Heater Items listed as OPTIONAL depend on the specific model installed. Figure 9 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 1 4 |...

  • Page 15: For Model: 18K Multi Zone Max Performance System

    Service Manual 5.2 For Model: 18K Multi Zone Max Performance System BMS500-AAM018-1CSXHC Items listed as OPTIONAL depend on the specific model installed. Figure 10 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 15...

  • Page 16: For Models: 27K Multi Zone Regular Heat & Max Performance System Bms500-Aam027-1Csxrc, Bms500-Aam027-1Csxhc

    5.3 For Models: 27K Multi Zone Regular Heat & Max Performance System BMS500-AAM027-1CSXRC, BMS500-AAM027-1CSXHC Notes: This symbol indicates field wiring Items listed as OPTIONAL depend on the specific model installed. Figure 11 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 1 6 |...

  • Page 17: For Model: 36K Multi Zone Regular System

    5.4 For Model: 36K Multi Zone Regular System BMS500-AAM036-1CSXRC Notes: This symbol indicates field wiring Items listed as OPTIONAL depend on the specific model installed. Figure 12 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 17...

  • Page 18: For Model: 36K Multi Zone Max Performance System

    Base Pan Heater Compressor Crankcase Heater HEAT_D CHASSIS HE ATER HEAT_Y REVERSING VALVE COMP TOP COMP. TOP OLP TEMP. SENSOR Figure 13 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 1 8 |...

  • Page 19: For Model: 48K Multi Zone Regular System

    ELECTRONIC EX PANSIVE VALVE Base Pan Heater Compressor Crankcase Heater HEAT_D CHASSIS HE ATER HEAT_Y REVERSING VALVE COMP TOP COMP. TOP OLP TEMP. SENSOR Figure 14 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 19...

  • Page 20: For Model: 48K Multi Zone Max Performance System

    5.7 For Model: 48K Multi Zone Max Performance System BMS500-AAM048-1CSXHC Notes: Items listed as OPTIONAL depend on the specific model installed. Base Pan Heater Compressor Crankcase Heater Figure 15 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 2 0 |...

  • Page 21: Installation Details

    Max. height difference between IU and OU (m) (49.2ft) (49.2ft) (49.2ft) (49.2ft) Max. height difference between IUs (m) (33ft) (33ft) (33ft) (33ft) Table 9 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 21...

  • Page 22: First Time Installation

    — Line set and coil should be pressurized to at least 150 PSIG using dry Nitrogen — Check for leaks using bubble solution at each braze joint Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 2 2 |...
  • Page 23 6. Replace valve stem caps on the service port. Use a torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 23...

  • Page 24: Collecting The Refrigerant Into The Outdoor Unit

    2 way and 3 way valve’s stem nuts. Use a torque wrench to tighten the 3 way valve's service port cap to a torque of 18N. Be sure to check for gas leakage. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 2 4 |...

  • Page 25: Operation Characteristics

    (vertically to the floor), and set to HIGH fan mode. The optimum performance will be achieved during this operating temperature zone. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 25...

  • Page 26: Electronic Functions

    If these protections are triggered, the A/C unit stops and the LED displays the failure code. The unit restarts 3 minutes after the protection mechanism has turned off. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 2 6 |...
  • Page 27 Resume HeatT4Zone2l Heating 9 current limit value HeatT4Zone1l Heating 5 current limit value Heating stop protection current HeatStopl Figure 26 Figure 24 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 27...

  • Page 28: Control And Functions

    Use the following table and final capacity request to confirm the operating frequency. Frequency (Hz) L_F2 L_F2 L_F1 L_F2 Amendatory capacity demand. Table 15 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 2 8 |...
  • Page 29 Heating Mode: T1 Ts Capacity area Capacity area Norm code (N) Figure 29 Model Table 16 The final result is an integer. Figure 31 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 29...
  • Page 30 T3 rises above than TCDE1°C. T3 remains at TCDE2°C or above for 80 seconds. The machine runs for 10 consecutive minutes in defrost mode. Figure 33 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 3 0 |...
  • Page 31 4. Other EXV(except for EVI valve) cannot be operated at the same time. The action priorityorder is A-B-C-D-E-main valve. The EVI valve can be operated together with other EXV. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 31...
  • Page 32 2 consecutive minutes. Failure or protection (excluding discharge temperature protection and high/low pressure protection) causes the four-way valve to immediately shut down. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 3 2 |...
  • Page 33 The display value is a hex number. For example, the digital display tube shows “Cd”, it means AD value is 205. AD value of voltage Table 18 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 33...
  • Page 34 For example, the digital display tube show “2.0”,it means the EXV open angle is 120×4=480p.) EVI valve angle(only for 48K Hyper Heat System) Table 19 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 3 4 |...
  • Page 35 The display value is a hex number. For example, the digital display AD value of AC voltage tube shows “Cd”, it means AD value is 205. AD value of DC voltage Table 20 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 35...
  • Page 36 Off: 0, Super ultra high speed:1, Super high speed:2, High speed:3, Outdoor unit fan motor state Med speed: 4, Low speed: 5, Breeze:6, Super breeze: 7 Reason of stop Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 3 6 |...

  • Page 37: Troubleshooting

    The voltage in P3 and P4 in outdoor PCB is approximately 310V. The voltage in P5 and P6 in outdoor PCB is approximately 310V. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 37...

  • Page 38: Multi Zone Outdoor Unit Error Codes

    Open or short circuit of outdoor unit temperature sensor(T3,T4.T5) Table 21 For Indoor Error Codes, please refer to the indoor service manual. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 3 8 |...

  • Page 39: Quick Check By Error Codes

      Refrigerant Charge / Leak     System Block       Power Supply  Table 22 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 39...

  • Page 40: Odu Pcb & Ipm

    TESTPORT CN24 used for testing CN27 connect to key board CN1 Figure 39 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 4 0 |...
  • Page 41 Service Manual 8.3.2 PCB: Multi Zone Regular 27K, 36K & Max Performance 18K, 27K BMS500-AAM027-1CSXRC, BMS500-AAM036-1CSXRC, BMS500-AAM018-1CSXHC, BMS500-AAM027-1CSXHC Figure 40 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 41...
  • Page 42 Current loop communication C, signal wire, connect to the terminal (24V DC Pulse wave) CN16 Current loop communication D, signal wire, connect to the terminal (24V DC Pulse wave) Table 23 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 4 2 |...
  • Page 43 CN2/CN3 connect to reactor CN_COMP CN_COMP connect to compressor connect to main board CN21 AN_DC CN14 connect to outdoor DC fan Table 24 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 43...
  • Page 44 Service Manual 8.3.4 PCB: Multi Zone Regular 48K & Max Performance 36K, 48K BMS500-AAM048-1CSXRC, BMS500-AAM036-1CSXHC, BMS500-AAM048- 1CSXHC Figure 42 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 4 4 |...
  • Page 45 Electric Expansion Valve E CN38 connect to Electric Expansion Valve F connect to IPM&PFC board CN9 CN22 485 communication Table 25 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 45...
  • Page 46 Connect to main PCB CN6 FAN_DC FAN_1/FAN_2 connect to outdoor DC fan 1& DC fan 2 HEAT1 HEAT2 Connect to compressor 4-WAY Table 26 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 4 6 |...

  • Page 47: Outdoor Unit Display

    If the indoor unit is not connected, the digital display shows: “――” Indoor unit D evaporator outlet temperature (T Indoor unit E evaporator outlet temperature (T Table 27 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 47...
  • Page 48 For example, the digital display tube show “2.0”,it means the EXV open angle is 120×4=480p.)" EVI valve angle(only for M5OG-48HFN1-M- [X]) Table 28 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 4 8 |...
  • Page 49 If the indoor unit is not connected, the digital display shows: “――” Indoor unit D evaporator outlet temperature (T Indoor unit E evaporator outlet temperature (T Table 29 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 49...
  • Page 50 Off: 0, Super ultra high speed:1, Super high speed:2, High speed:3, Med Outdoor unit fan motor state speed: 4, Low speed: 5, Breeze:6, Super breeze: 7 Reason of stop Table 30 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 5 0 |...
  • Page 51 In protection or malfunction, the LED displays an error code or protection code. “PH”, “RO”, “LC”, ”E6” are not suitable for M2OA-18HFN1-M, M2OI- 18HFN1-M, M3OJ-27HFN1-M, M3OI-28HFN1-M, M4OG-36HFN1-M Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 51...

  • Page 52: Diagnosis And Solution

    Figure 47 The photo above is for reference only, it may not be identical to the PCB shipped with your equipment. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 5 2 |...
  • Page 53 3 for tri zone, 4 for qua zone). Refer Figure 53. No first time No second time Change outdoor unit PCB assembly(include wiring) totally Figure 48 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 53...
  • Page 54 Figure 52 Check point button, press 1 time to check how many indoor Opera ng units are connected. Standby Figure 53 Figure 50 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 5 4 |...
  • Page 55 Replace outdoor main board, and then check whether the system can run normally Replace the electric control Trouble is solved Figure 54 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 55...
  • Page 56 Use a multimeter to test the DC voltage between black pin and white pin of signal wire. The normal value should be around 5V. Figure 56 Figure 55 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 5 6 |...
  • Page 57 Compressor discharge temperature sensor T5 is in open circuit or has short circuited(EC 54) Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited(EC 56) Figure 58 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 57...
  • Page 58 PCBs Replace IPM board, and then check whether the system can run normally Replace outdoor PCB Problem is solved Figure 59 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 5 8 |...
  • Page 59 P (or E1/E2/E3) -N (GND) (for 18K & 27K models) Bridge rectifier (for18K & 27K models) IPM Module (for 18K & 27K models) Figure 61 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 59...
  • Page 60 Service Manual IPM board (for 36K model) Figure 62 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 6 0 |...
  • Page 61 + and - port. The normal value should be between 190V~250V. IPM board (for 48K model) IPM Module (for 48K model only) Figure 63 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 61...
  • Page 62 Replace the inductance good, the resistance of the two ports should be 0 Replace the PFC module (IPM Problem is solved module) Figure 64 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 6 2 |...
  • Page 63 Service Manual Inductance Figure 65 Two ports of the inductance Figure 66 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 63...
  • Page 64 Replace the is normal through index 1? is normal through index 1? Replace the fan motor Replace the fan motor Figure 67 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 6 4 |...
  • Page 65 PCB must have problems and need to be replaced. Black White 13.5~16.5V Yellow 0~6.5V Blue 13.5~16.5V Table 38 Figure 68 Figure 69 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 65...
  • Page 66 Otherwise, the PCB must has problems and need to be replaced. Figure 70 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 6 6 |...
  • Page 67 Replace the outdoor Check whether the refrigerant Check whether the refrigerant system is ok system is ok Figure 71 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 67...
  • Page 68 Service Manual Figure 72 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 6 8 |...
  • Page 69 Charge the unit with proper Does the system has sufficient amount of refrigerant as amount of refrigerant? defined in the IOM System should operate normally Figure 73 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 69...
  • Page 70 Service Manual Figure 74 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 7 0 |...
  • Page 71 Replace the electric control box Problem is solved Replace the electric control box Figure 75 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 71...
  • Page 72 Service Manual Figure 76 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 7 2 |...
  • Page 73 Appendix 2. Ye s Replace outdoor main PCB Replace outdoor main PCB Replace high pressure valve assembly Figure 77 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 73...
  • Page 74 Clean the heat exchanger exchanger is dirty exchanger is dirty Replace outdoor PCB Check refrigerant level and add as necessary Figure 78 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 7 4 |...
  • Page 75 (for 36K & 48K regular mul zone models) Replace the compressor, and check whether the system can work normally? Problem is solved Figure 79 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 75...
  • Page 76 Is it zero? Replace the outdoor PCB. Refrigerant leak should be repaired Replace the outdoor PCB. and unit properly recharged. Figure 80 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 7 6 |...
  • Page 77 Replace the fan motor symmetrical Check the fan three-phase output for obvious open Replace the main PCB circuit Problem is solved Figure 81 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 77...
  • Page 78 8.6.17 Outdoor unit IR chip drive failure (PC 45) Troubleshooting: Power off,then restart the unit 2 minutes later. Replace the inverter module PCB. Figure 83 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 7 8 |...
  • Page 79 Replace the adapter main Does the error still The problem is solved exist? Replace the outdoor main control board Figure 84 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 79...
  • Page 80 Temperature sensors: Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 8 0 |...
  • Page 81 0.25125 16.1156 2.84421 0.73119 0.24512 15.3418 2.73823 0.70944 0.23916 14.6181 2.63682 0.68844 0.23338 13.918 2.53973 0.66818 0.22776 13.2631 2.44677 0.64862 0.22231 Table 47 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 81...
  • Page 82 17.58 4.562 90.66 16.94 4.426 86.49 16.32 4.294 82.54 15.73 4.167 78.79 15.16 4.045 75.24 14.62 3.927 71.86 14.09 3.812 Table 48 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 8 2 |...
  • Page 83 18K Max Performance 27K Max Performance 36K Max Performance Blue - Red Blue - Black 1.72Ω 0.75Ω 0.65Ω 0.37Ω Red - Black Table 49 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 83...
  • Page 84 Normal resistance value Digital tester Normal resistance value (+)Red (-)Black (+)Red (-)Black ∞ ∞ (Several MΩ) (Several MΩ) (+)Red Table 50 Figure 88 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 8 4 |...
  • Page 85 Step 2. Turn off the power, use a digital tester to measure the resistance. The value should be between 1.8~2.5 KΩ. Figure 90 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 85...
  • Page 86 Step 2. Check the resistance value on EXV coil Color of lead wire Normal Value Red- Blue Red - Yellow Approximately 50Ω Brown-Orange Brown-White Table 51 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 8 6 |...

  • Page 87: Disassembly Guide

    Figure 95 5. Remove the screws of water collector, and remove the water collector. (3 screws) Figure 93 Screws of water collector Figure 96 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 87...
  • Page 88 4. Remove the fan. 5. Remove the four fixing screws of the fan motor, then remove the fan motor. Figure 97 Figure 99 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 8 8 |...
  • Page 89 5. Remove the electronic installing box subassembly (4 hooks). Figure 105 9. Remove the PCB board. Figure 102 6. Remove the support of electronic control box. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 89...
  • Page 90 6. Remove the hex nuts and washers fixing the compressor on bottom plate. Expansion valves Figure 107 Figure 109 7. Lift the compressor from the base pan assembly. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 9 0 |...

  • Page 91: Outdoor Unit - Bms500-Aam027-1Csxrc, Bms500-Aam018-1Csxhc, Bms500-Aam027-1Csxhc

    3. Remove the top cover (4 screws). Screws of top cover Screws of front panel Figure 111 4. Remove the right side panel (1 screw). Figure 113 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 91...
  • Page 92 6. Remove the right & rear panel (15 screws). Screws of right-rear panel Figure 117 3. Remove the cover of electrical control box cover. Figure 115 Figure 118 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 9 2 |...
  • Page 93 Figure 121 3. Disconnect the connector to reactor from PCB. Figure 120 PCB board Figure 122 4. Disconnect the compressor wire. Figure 123 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 93...
  • Page 94 CN25/CN23/CN20: S-A,S-B,S-C (3p/3p/3p,white/white/white) Wires: CN1/CN2: 4-way valve (blue-blue) CN5/CN6: Crankcase heating cable (red-red) CN3:L1-IN (red) Figure 127 CN4:L2-IN (black) 9. Remove PCB. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 9 4 |...
  • Page 95 6. Remove the hex nuts and washers fixing the compressor on bottom plate. Figure 131 Figure 129 7. Lift the compressor from the base pan assembly. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 95...
  • Page 96 4. Remove fixing screw of the coil and remove the coil (1 screw). Coil Expansion valves Figure 134 Figure 132 5. Detach the welded parts of 4-way valve and pipe. Welded parts Figure 133 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 9 6 |...

  • Page 97: Outdoor Unit - Bms500-Aam036-1Csxhc, Bms500-Aam048-1Csxrc, Bms500-Aam048-1Csxhc

    6. Disconnect the fan motor connectors FAN1 (3p, white) and FAN2 (3p, white) from DC motor driver board. Figure 136 4. Remove the top cover (4 screws). Figure 139 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 97...
  • Page 98 3. Remove side and rear panel (17 screws). Screws of terminal board Screws of right rear panel Screws of right rear panel Figure 142 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 9 8 |...
  • Page 99 CN17/CN18: 4-way valve (blue-blue) CN19/CN20: Connected to crankcase Figure 144 heating cable (black-red) CN24/CN25: Electric heater of chassis (orange-orange) CN1: L-IN (red) CN3: N-IN (black) Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 99...
  • Page 100 Figure 146 6. Disconnect the ground wire (yellow-green) after removing the big handle. Figure 149 Figure 147 Figure 150 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 1 0 0 |...
  • Page 101 6. Remove the hex nuts and washers fixing the compressor on bottom plate. xpansion valves Figure 154 Figure 152 7. Lift the compressor from the base pan assembly. Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 101...
  • Page 102 Alternatively, please visit our Service & Support webpage to find FAQs, videos, service bulletins, and more; www.boschheatingcooling.com/service or use your cellphone to scan the code below. Figure 155 Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) 1 0 2 |...
  • Page 103 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023) | 103...
  • Page 104 United States and Canada Bosch Thermotechnology Corp. 65 Grove St. Watertown, MA 02472 Tel: 866-642-3198 Fax: 954-776-5529 www.bosch-thermotechnology.us BTC 769102304 A / 01.2023 Bosch Thermotechnology Corp. reserves the right to make changes without notice due to continuing engineering and technological advances.

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Bms500-aam018-1csxrcBms500-aam027-1csxrcBms500-aam036-1csxrcBms500-aam048-1csxrcBms500-aam018-1csxhcBms500-aam027-1csxhc ... Show all

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