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

Bosch Climate 5000 Series Service Manual

Four way cassette ductless split air conditioner / heat pump
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Service Manual
Four Way Cassette Ductless Split Air Conditioner /
Heat Pump
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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  • Page 1 Service Manual Four Way Cassette Ductless Split Air Conditioner / Heat Pump 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 Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)

  • Page 3: Table Of Contents

    7.4 ODU PCB & IPM 7.5 Indoor Wiring Diagram 7.6 Outdoor Wiring Diagram 7.7 Wall Mounted Unit (IDU & ODU) Error Code Diagnosis and Solution Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)

  • Page 4: Key To Symbols And Safety Instructions 4 8 Disassembly Guide

    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 Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)
  • Page 5 NOTICE: PROPERTY DAMAGE f Install condensate drainage piping according to the instructions in this manual. Improper condensate drainage may cause water damage to your home and property. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)

  • Page 6: Part Names And Model Numbers

    Regular Outdoor Units Outdoor Units Outdoor Units BMS500-AAU009-1AHCXB BMS500-AAS009-1CSXRC BMS500-AAS009-1CSXHC BMS500-AAU012-1AHCXB BMS500-AAS012-1CSXRC BMS500-AAS012-1CSXHC BMS500-AAU018-1AHCXB BMS500-AAS018-1CSXRC BMS500-AAS018-1CSXHC 208-230V Cassette BMS500-AAU024-1AHCXC BMS500-AAS024-1CSXRC BMS500-AAS024-1CSXHC BMS500-AAU036-1AHCXC BMS500-AAS036-1CSXLC BMS500-AAU048-1AHCXC BMS500-AAS048-1CSXLC Table 1 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)

  • Page 7: Dimensions & Clearances

    3.2 Regular Cassette (24K, 36K & 48K) Capacity (Btu/h) Inch 6.50 3.15 8.07 1.97 Inch 6.50 3.94 9.65 2.36 6.50 3.94 11.30 2.36 Inch Figure 2 Dimensions in inches. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)

  • Page 8: Outdoor Unit

    More than 30cm (11.8in) More than 60cm (23.6in) (Service space) More than 30cm (11.8in) More than 60cm (23.6in) More than 200cm (79in) Outdoor Unit Clearances Figure 4 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)

  • Page 9: Refrigerant Cycle Diagrams

    12K Systems Figure 5 4.2 Regular and Max Performance 18K Systems Figure 6   F or Max Performance 9K, 12K, 18K System, there is no Accumulator. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025)

  • Page 10: Regular 24K, 30K Systems, Max Performance 24K System

    Service Manual 4.3 Regular 24K, 30K Systems, Max Performance 24K System Figure 7 4.4 Regular 36K System Figure 8 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 1 0 |...

  • Page 11: Light Commercial 36K, 48K, 60K Systems

    High pressure switch 3-WAY VALVE Accumulator TP Discharge temp. sensor Compressor Low pressure Oil separator switch COOLING HEATING Oil return Capillary Figure 9 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 11...

  • Page 12: Installation Details

    3/8" / Φ9.52 1/4" / Φ6.35 1/2" / Φ12.7 3/8" / Φ9.52 5/8" / Φ15.9 3/8" / Φ9.52 3/4" / Φ19 Table 5 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 1 2 |...

  • Page 13: First Time Installation

    If bubbles come out, the pipes are leaking. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 13...

  • Page 14: Re-Installation / Indoor Unit Needs To Be Repaired

    3-way valves. 8. Use a torque wrench to tighten the caps to a torque of 18 N.m. 9. Check for gas leakage. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 1 4 |...

  • Page 15: Operation Characteristics

    (vertically to the floor), and set HIGH fan mode. f The optimum performance will be achieved during this operating temperature zone. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 15...

  • Page 16: Electronic Functions

    Ducted indoor model may have display; however, due to installation set up, it may not be visible. Please use Wired Wall Thermostat (optional accessory) to check system information easily. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 1 6 |...

  • Page 17: Main Protection

    5. Auto fan: In fan-only mode, AC operates the same as auto fan in cooling mode with the temperature set at 24°C.(Tsc =24°C) Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 17...
  • Page 18 Decrease: Decrease the running frequency to the lower level per 1 minute. f Hold: Keep the current frequency. f Resume: No limitation for frequency. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 1 8 |...
  • Page 19 15°C (59°F) ≤ T1 ≤ 19°C(66.2°F) (34.2°F-T1) T1<15°C (59°F) ΔTE1=4°C (7.2°F) Table 9 2. Auto fan For DC fan motor units: f Rise curve f Descent curve Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 19...

  • Page 20: Dry Mode

    If the setting temperature is modified, the machine selects a new running function. The setting time is relative time. The system will quit the timer function when it has malfunction. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 2 0 |...

  • Page 21: Sleep Function

    The unit will only change modes if the information from the remote control makes it necessary, not from the unit’s temperature setting. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 21...
  • Page 22 1. In engineer mode, press the key combination of “On/Off + Air speed” for 2s; 2. The engineer mode will be exited if there are no valid key operations for continuous 60s. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 2 2 |...
  • Page 23 Causes of compressor stop 0-99 Decimal display consult with manufacturer Reserve 0-FF Table 11 0 - FF is a hexidecimal display value. Not OFF. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 23...

  • Page 24: Troubleshooting

    PCB. A screwdriver will also work as a resistive element. For reference the most common error codes are E1, P0, and P3. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 2 4 |...

  • Page 25: Error Codes - 9K~18K 4-Way Cassette Indoor Unit

    9k~18k models do not have display to show error codes and Operation and Timer Indicator will turn on / off and or flash according to above table to show system malfunction. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 25...

  • Page 26: Error Codes - 24K, 36K, 48K 4-Way Cassette Indoor Unit

    Outdoor unit malfunction 1 time Indoor units mode conflict(match with multi outdoor unit) Table 13  O (light)  X (off)     ( flash) Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 2 6 |...

  • Page 27: Quick Check By Error Codes

    For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric control box should be replaced as a whole. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 27...

  • Page 28: Odu Pcb & Ipm

    CN29 0V AC (standby) CN30 10-230V AC (running) COMP_IPM IPM1 IPM for compressor Bridge CN4_2 connect to transformer CN4_3 Table 15 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 2 8 |...
  • Page 29 IPM for DC fan CN28 connect to compressor CN29 0V AC (standby) CN30 10-200V AC (running) COMP_IPM IPM 301 IPM for compressor Table 16 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 29...
  • Page 30 EEPROM programmer port CN28 connect to compressor CN29 0V AC (standby) CN30 10-200V AC (running) COMP_IPM IPM 301 IPM for compressor Table 17 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 3 0 |...
  • Page 31 IPM1 IPM for compressor CN27 connect to compressor CN28 0V AC (standby) CN29 10-200V AC (running) EE_PORT CN505 EEPROM programmer port Table 18 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 31...
  • Page 32 7.4.6 PCB: Regular Single Zone (for Wall Mounted IDU) 30K & 36K BMS500-AAS030-1CSXRC, BMS500-AAS036-1CSXRC 7.4.7 PCB: Light Commercial Single Zone (for Cassette and Ducted IDU) BMS500-AAS036-1CSXLC Figure 28 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 3 2 |...
  • Page 33 208-230V AC when is ON CN36 4-WAY CN38 connect to 4 way valve, 208-230V AC when is ON. CN27 connect to key board CN1 Table 19 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 33...
  • Page 34 Service Manual 7.4.8 PCB: Light Commercial (for Cassette & Ducted IDU) 48K & 60K BMS500-AAS048-1CSXLC, BMS500-AAS060-1CSXLC Figure 29 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 3 4 |...
  • Page 35 T3, ambient temp. sensor T4 CN15/CN23/CN26/CN30/CN33/CN38 connect to Electric Expansion Valve(A~F) connect to IPM&PFC board CN9 CN22 Communication to indoor unit Table 20 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 35...

  • Page 36: Indoor Wiring Diagram

    Service Manual 7.5 Indoor Wiring Diagram 7.5.1 Indoor Wiring Diagram_4-Way Cassette Unit 9K, 12K & 18K models Figure 30 24K model Figure 31 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 3 6 |...
  • Page 37 Service Manual 36K & 48K models Figure 32 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 37...
  • Page 38 6. The voltage of the port is 12V DC, design Max. current is 5mA. Figure 34 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 3 8 |...

  • Page 39: Setting Fan Speed

    5. When the system is in force cooling or capacity testing mode, the fresh air TEL0+6 Super slow intake motor will not work. TEL0 Fan off Figure 40 Legend: TELO = fan stop temperature Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 39...
  • Page 40 Range: 00-63 Figure 42 Micro-switch SW5 is for setting mode priority of multi connection. Range: Heat, cool Figure 45 Figure 43 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 4 0 |...
  • Page 41 Micro-switch SW2 /SW2-1 is for selection of indoor FAN ACTION if room temperature reaches the setpoint and the compressor stops. Range: OFF (in 127s), Keep running Figure 51 Figure 48 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 41...
  • Page 42 Micro-switch S1 and dial-switch S2 are for address setting when you want to control this unit by a central controller. Range: 00-63 Figure 54 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 4 2 |...

  • Page 43: Outdoor Wiring Diagram

    Service Manual 7.6 Outdoor Wiring Diagram 7.6.1 Regular Single Zone (115V 12K) Figure 56 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 43...
  • Page 44 Service Manual 7.6.2 Regular & Max Performance Single Zone (9K & 12K) TRANSFORMER Figure 57 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 4 4 |...
  • Page 45 Service Manual 7.6.3 Regular Single Zone (18K & 24K) & Max Performance Single Zone (18K) Figure 58 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 45...
  • Page 46 Service Manual 7.6.4 Max Performance Single Zone (24K) Regular Single Zone (30K & 36K) Figure 59 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 4 6 |...
  • Page 47 Service Manual 7.6.5 Light Commercial Single Zone (36K for Cassette and Ducted IDU) Figure 60 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 47...
  • Page 48 Service Manual 7.6.6 Light Commercial Single Zone (48K & 60K) Figure 61 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 4 8 |...

  • Page 49: Wall Mounted Unit (Idu & Odu) Error Code Diagnosis And Solution

    7 times FLASH PC 03 Low pressure protection TS13-INV 1 times Indoor units mode conflict(match with multi outdoor unit) TS14 Table 21 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 49...

  • Page 50: Indoor Pcb

    Figure 63 The two photos above are for reference only, they may not be identical to the PCBs shipped with your equipment. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 5 0 |...

  • Page 51: Troubleshooting

    For certain models, outdoor PCB can not be removed separately. In this case, the outdoor electric control box Replace IPM board should be replaced as a whole. Figure 64 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 51...
  • Page 52 If the outdoor unit has malfunctioned, the voltage will move alternately with positive value. While if the indoor unit has malfunction, the voltage will be a certain value. Figure 65 Figure 66 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 5 2 |...
  • Page 53     Z ero crossing detection error is only valid for the unit with AC fan motor, for other models, this error is invalid. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 53...
  • Page 54     F or certain models, outdoor PCB can not be removed separately. In this case, the outdoor electric control box should be replaced as a whole. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 5 4 |...
  • Page 55 Input Terminal replaced. Otherwise, replace the ODU PCB. Black White White Black Figure 70 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 55...
  • Page 56 UVW output for DC fan motor Table 32 CN1 Communication with main PCB Figure 72 Signal Voltage 13.5-16.5V 0~6.5V 13.5-16.5V Figure 73 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 5 6 |...
  • Page 57 For certain models, outdoor unit uses combination sensor, T3,T4 and TP are the same of sensor. Figure 75 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 57...
  • Page 58 T1 or T2 sensor faulty Supposed causes Indoor PCB faulty System problems, such as leakage or blocking Table 34 Troubleshooting: Figure 76 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 5 8 |...
  • Page 59 Ensure a proper connection good ? Replace the indoor main PCB Does the error still exist ? Replace the display board Figure 77 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 59...
  • Page 60 Check whether the refrigerant Check whether the refrigerant system is running normally system is running normally Figure 78 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 6 0 |...
  • Page 61 If the part that touches the compressor has turned brownish due to the compressor running hot, then the compressor most likely has failed.. Figure 79 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 61...
  • Page 62 Resistance value Digital tester Resistance value (+)Red (-)Black (+)Red (-)Black ∞ ∞ (Several MΩ) (Several MΩ) – Table 38 Figure 81 Figure 80 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 6 2 |...

  • Page 63: Check The Power Supply

        F or certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric control box should be replaced as a whole. Figure 83 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 63...
  • Page 64 OLP. Is it zero ? is normal? Replace the outdoor control PCB . Repair the refrigerant Replace the outdoor control PCB . system . Figure 84 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 6 4 |...
  • Page 65 Check whether the refrigerant Check whether the refrigerant system is func oning properly system is func oning properly Figure 86 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 65...
  • Page 66 Replace the outdoor main PCB removed separately. In this case, the outdoor electric control box should be replaced as a whole. Figure 87 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 6 6 |...
  • Page 67 Check whether the Check whether the electric control box should be replaced as a whole. refrigerant system is ok refrigerant system is ok Figure 88 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 67...
  • Page 68 Trouble is solved Trouble is solved normally ? normally ? Replace the electric control box Replace the electric control box Figure 89 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 6 8 |...
  • Page 69 3. Check corresponding temperature sensor resistance value table. Figure 90 The picture and the value are only for reference, actual condition and specific value may vary. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 69...

  • Page 70: Appendix 1 Resistance To Temperature Value Table For Resistive Sensors

    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 44 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 7 0 |...

  • Page 71: Appendix 2 Resistance To Temperature Value Table For Resistive Sensors: T5

    95.05 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 45 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 71...
  • Page 72 Performance Ducted Blue - Red Blue - Black 0.65Ω 0.37Ω 0.37Ω 1.82Ω 1.82Ω 1.03Ω 1.03Ω 0.10Ω 0.10Ω Red - Black Table 47 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 7 2 |...
  • Page 73 Normal resistance value Digital tester Normal resistance value (+)Red (-)Black (+)Red (-)Black ∞ ∞ (Several MΩ) (Several MΩ) (+)Red Table 48 Figure 93 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 73...
  • Page 74 If the value of the voltage is not in the range, the PCB must have problems and need to be replaced. Figure 96 Figure 94 Figure 95 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 7 4 |...
  • Page 75 3. Check the resistance value of each winding in the following table. Color of lead winding Normal Value Red - Blue Red - Yellow About 50Ω Brown - Orange Brown - White Table 49 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 75...
  • Page 76 33.8 31.5 27.8 26.3 24.9 3.03 2.85 2.53 2.28 2.08 3.25 3.00 2.66 2.54 2.33 3.38 3.15 2.78 2.63 2.49 Table 51 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 7 6 |...

  • Page 77: Disassembly Guide

    Step 3: Remove 4 screws & 2 wire ropes, and then the panel can be disassembled. Figure 99 4 screws 2 wire ropes Figure 102 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 77...
  • Page 78 Step 3: Disconnect all the connection wires from the PCB. Indoor fan Pump Water lever Temp. sensors 3 screws Swing motor Power Input Display board Figure 108 Figure 105 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 7 8 |...

  • Page 79: Fan Wheel

    Step 3: Remove 2 screws and disassemble the electronic control box. 2 screws Figure 111 Step 3: Remove the fixing nut to pull out the fan wheel. Figure 110 Figure 112 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 79...

  • Page 80: Fan Motor

    Step 3: Remove the 5 screws to disassemble the fan motor. Figure 115 5 screws Step 3: Take out the water collecting assembly. Figure 114 Figure 116 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 8 0 |...
  • Page 81 Figure 119 Figure 117 Step 3: Remove the 2 screws to disassemble the pump supporter. Be careful of the connection wires. Figure 118 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 81...
  • Page 82 Figure 121 Step 4: Remove the fixing clamps and 1 screw to disassemble the evaporator. Fixing clamps 1 screw Figure 124 Figure 122 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 8 2 |...

  • Page 83: Display Board

    Step 4: Remove 2 screws of the main control board and the 2 ground screws. 2 screws for ground wires Figure 126 Figure 129 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 83...

  • Page 84: Electronic Control Box

    Step 5: Turn over the water collector subassembly and remove the water level switch. 2 screws Figure 131 Step 3: Remove the 2 screws fixing the water collector. Figure 134 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 8 4 |...
  • Page 85 Step 7: Pull out the fan wheel. Figure 137 Step 3: Remove the 5 screws to disassemble the fan motor. 5 screws Figure 136 Figure 138 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 85...

  • Page 86: Drain Pump

    Step 3: Remove the evaporator fixing board (4 screws). Figure 139 Step 3: Remove the water pump box assembly. Figure 140 Figure 142 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 8 6 |...

  • Page 87: Outdoor Unit

    Big Handle Figure 144 4. Remove the screws of the front right panel and then remove the front right panel (2 screws). Figure 143 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 87...
  • Page 88 6. Remove the screws of water collecting cover and then remove the water collecting cover. Right Panel Figure 149 Water Collecting Cover Figure 147 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 8 8 |...

  • Page 89: Panel Plate

    4. Remove the screws of water collecting cover and then remove the water collecting cover (2 screws). Right Panel Figure 154 Water Collecting Cover Figure 152 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 89...
  • Page 90 4. Remove the screws of water collecting cover and then remove the water collecting cover (2 screws). Figure 159 Water Collecting Cover Figure 157 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 9 0 |...

  • Page 91: Electrical Parts

    7. Remove the connector for the DR and reactor. 8. Then remove the electronic control board. Figure 163 3. Remove the electronic installing box subassembly (4 hooks). Figure 161 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 91...
  • Page 92 5. Disconnect the connectors from the electronic control board Figure 168 2. Pull out the wires from electrical supporting plate and turn over the electronic control assembly. Figure 166 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 9 2 |...
  • Page 93 6. Then remove the electronic control board (4 hooks). Figure 170 4. Remove the fixing board (2 hooks). Figure 173 Figure 171 5. Disconnect the connectors from the electronic control board. Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 93...
  • Page 94 Remove the panel plate (refer to 9.4.1 Panel Plate) before disassembling fan. 1. Remove the nut securing the fan with a spanner. 2. Remove the fan. Figure 175 D-cut Figure 177 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 9 4 |...

  • Page 95: Sound Blanket

    Remove the panel plate (refer to 9.41 Panel plate) before disassembling sound blanket. 1. Remove the sound blanket (side and top) Sound Blanket (top) Figure 180 Sound Blanket (side) Figure 179 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 95...
  • Page 96 9.4.1 Panel plate and 9.4.2 Electrical parts) before disassembling sound blanket. 1. Remove the flange nut of terminal cover and remove the terminal cover. Figure 182 Terminal Cover Figure 181 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 9 6 |...
  • Page 97 Alternatively, please visit our Service & Support webpage to find FAQs, videos, service bulletins, and more; bosch-homecomfort.us/service or use your cellphone to scan the code below. Figure 183 Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 97...
  • Page 98 Service Manual Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) 9 8 |...
  • Page 99 Service Manual Bosch Cassette Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102302 B (05.2025) | 99...
  • Page 100 United States and Canada Bosch Thermotechnology Corp. 65 Grove St. Watertown, MA 02472 Tel: 800-283-3787 www.bosch-homecomfort.us BTC 769102302 B / 05.2025 Bosch Thermotechnology Corp. reserves the right to make changes without notice due to continuing engineering and technological advances.

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