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

Bosch Climate 5000 Series Service Manual

Ductless air conditioner/heat pump indoor units, wall mounted idu, 4-way cassette idu, medium & high static ducted idu
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Bosch Ductless Air Conditioner / Heat Pump Indoor Units
Climate 5000 Series
Wall Mounted IDU | 4-Way Cassette IDU | Medium & High Static Ducted IDU
Service Manual

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Summary of Contents for Bosch Climate 5000 Series

  • Page 1 Bosch Ductless Air Conditioner / Heat Pump Indoor Units Climate 5000 Series Wall Mounted IDU | 4-Way Cassette IDU | Medium & High Static Ducted IDU Service Manual...
  • Page 2 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Data subject to change 05.2025 | Bosch Thermotechnology Corp.

  • Page 3: Table Of Contents

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 3 Table of Contents 1 Key to Symbols and Safety Instructions 1.1 Key to Symbols 1.2 Safety 2 Part Names and Model Numbers 2.1 Model Numbers 3 Dimensions &...

  • Page 4: Key To Symbols And Safety Instructions

    4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 1 Key to Symbols and Safety Instructions 1.2 Safety Please read safety precautions before installation 1.1 Key to Symbols Incorrect installation due to ignoring instructions can cause serious damage or injury.
  • Page 5 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 5 WARNING: ELECTRICAL HAZARD CAUTION: CONTAINS REFRIGERANT f For all electrical work, follow all local and national wiring f This air-conditioning unit contains fluorinated gases. For standards, regulations, and the Installation Manual.

  • Page 6: Part Names And Model Numbers

    6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 2 Part Names and Model Numbers 2.1 Model Numbers Max Performance Light Commercial Voltage Indoor Type Capacity Indoor Units Regular Outdoor Units Outdoor Units...

  • Page 7: Dimensions & Clearances

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 7 3 Dimensions & Clearances 3.1 Wall Mounted Indoor Unit Figure 1 Capacity Model W x D x H (in) W x D x H (mm) BMS500-AAU009-1AHWXB 32.9 x 7.8 x 11.0...

  • Page 8: Mounting Plates

    8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 3.1.1 Mounting Plates 429mm (16.88in) Indoor unit 140mm 110mm outline (5.5in) (4.3in) 9K & 12K Btuh Models 835mm (32.9in) Left rear Right rear wall hole wall hole 65mm (2.5in)

  • Page 9: 4-Way Cassette Indoor Unit

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 9 3.2 4-Way Cassette Indoor Unit 3.2.1 Compact Cassette (9K, 12K & 18K) Panel Liquid Wiring side side Body connection port Drain hole ( for Service)

  • Page 10: Ducted Indoor Unit

    1 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 3.3 Ducted Indoor Unit 3.3.1 Medium Static Pressure (9K, 12K, 18K, 24K, 36K & 48K) Air filter Air inlet from rear side 4-install hanger Test mouth &...
  • Page 11 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 11 3.3.2 High Static Pressure (60K) 33.8 30.3 27.6 (suspension position) 2 - 0.13 NOTE:16 groups all around Figure 8 Dimensions in inches. Bosch Thermotechnology Corp. |05.2025...

  • Page 12: Outdoor Unit

    1 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 3.4 Outdoor Unit Figure 9 Outdoor Unit Dimensions mm (in.) Mounting Dimensions Outdoor Model W x H x D A mm (in.) B mm (in.) BMS500-AAS009-1CSXRA 770x555x300 (30.3x21.85x11.81)

  • Page 13: Refrigerant Cycle Diagram

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 13 4 Refrigerant Cycle Diagram INDOOR OUTDOOR Electronic expansion valve LIQUID SIDE LIQUID SERVICE T3 Condenser VALVE temp. sensor REFRIGERANT FLOW IN COOLING HEAT HEAT T4 Ambient temp.

  • Page 14: Installation Details

    1 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 6 Installation Details Precharged Max Pipe Max difference Additional charge length Length in height for each ft Capacity 6.1 Torque Requirements (ft / m)

  • Page 15: Adding The Refrigerant To An Existing System

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 15 6.6 Re-Installation / Indoor Unit Needs to be Repaired Make sure the pressure display in the pressure indicator is a little higher than the atmospheric pressure. Then remove the charge hose from the gas service Collecting the refrigerant into the outdoor unit (passive recovery) valve.

  • Page 16: Re-Installation While The Outdoor Unit Needs To Be Repaired

    1 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 6.7 Re-Installation While the Outdoor Unit Needs to be Repaired Refrigerant charging Evacuation for the whole system (Indoor Unit) (Liquid Side) (Outdoor Unit)

  • Page 17: Operation Characteristics

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 17 6.8 Operation Characteristics COOL operation HEAT operation DRY operation 63ºF - 90ºF 32ºF - 86ºF 50ºF - 90ºF Room Temperature 17ºC - 32ºC 0ºC - 30ºC 10ºC - 32ºC...

  • Page 18: Electronic Functions

    1 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 7 Electronic Functions Display may look different depending on IDU type. Display is not available with Compact Cassette (9K, 12K & 7.1 Abbreviation 18k) indoor model.

  • Page 19: Operation Modes And Functions

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 19 7.4 Operation Modes and Functions 7.4.3.2 Outdoor fan operation 7.4.1 Fan mode The outdoor unit will be run at different fan speed according to T4.
  • Page 20 2 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 7.4.6 Forced operation function 7.4.3.5 Evaporator coil temperature protection Forced cooling mode: The compressor and outdoor fan keep running and the indoor fan runs at low speed. After running for 30 minutes, AC will turn to auto mode with 75.2°F (24°C) setting...

  • Page 21: Auto Restart Function

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 21 7.4.9 Auto-restart function 7.4.14 Follow me The indoor unit is equipped with auto-restart function, which is carried out through If the indoor PCB receives the signal which results from pressing the an auto-restart module.
  • Page 22 2 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 7.4.16 Point check function (engineering troubleshooting mode) Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds.
  • Page 23 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 23 When the AC enter into information enquiry status, it will display code value in next 25s, the details are as follows: Enquiry information Display value...

  • Page 24: Troubleshooting

    2 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8 Troubleshooting For other models, please connect discharge resistance (approx.100Ω 40W) between +, - terminals of the electrolytic capacitor on the opposite side of the Safety outdoor PCB.

  • Page 25: Error Codes - 4-Way Cassette Indoor Unit

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 25 8.2 Error Codes - 4-Way Cassette Indoor Unit Operation indicator Number Cause Timer indicator Error Code flashes Indoor EEPROM (Electrically Erasable Programmable Read-Only Memory) error...

  • Page 26: Error Codes - Ducted Indoor Unit

    2 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.3 Error Codes - Ducted Indoor Unit NOTICE f If below error codes appear, please turn off the system and contact an Authorized Service Provider.

  • Page 27: Quick Check By Error Codes

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 27 8.4 Quick Check by Error Codes The table below is applicable for Single Zone system only. For detailed trouble shooting guide, please refer to Diagnosis and Solution section.

  • Page 28: Odu Pcb & Ipm

    2 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.5 ODU PCB & IPM 8.5.1 PCB: Regular 115V Single Zone 12K BMS500-AAS012-0CSXRB Figure 21 Number Name Description Earth: connect to Ground Power Supply...
  • Page 29 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 29 8.5.2 PCB: Regular Single Zone 9K & 12K BMS500-AAS009-1CSXRA, BMS500-AAS009-1CSXXA, BMS500-AAS012-1CSXRA, BMS500-AAS012-1CSXXA Figure 22 Number Name Description Earth: connect to Ground Power Supply N_in: connect to N-line (208-230V AC input)
  • Page 30 3 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.5.3 PCB: Regular Single Zone 18K & 24K BMS500-AAS018-1CSXRA, BMS500-AAS018-1CSXXA, BMS500-AAS024-1CSXRA, BMS500-AAS024-1CSXXA 8.5.4 PCB: Max Performance Single Zone 9K, 12K & 18K BMS500-AAS009-1CSXHB, BMS500-AAS012-1CSXHB, BMS500-AAS018-1CSXHB...
  • Page 31 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 31 8.5.5 PCB: Max Performance Single Zone 24K BMS500-AAS024-1CSXHB 8.5.6 PCB: Light Commercial (for Wall Mounted IDU) 30K & 36K BMS500-AAS030-1CSXRB, BMS500-AAS036-1CSXRB Figure 24 Bosch Thermotechnology Corp. |05.2025...
  • Page 32 3 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Number Name Description CN30 Current loop communication A, signal wire, connect to the terminal (24V DC Pulse wave) CN29 Current loop communication B, signal wire, connect to the terminal (24V DC Pulse wave)
  • Page 33 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 33 8.5.7 IPM: Max Performance Single Zone 24K BMS500-AAS024-1CSXHB 8.5.8 IPM: Light Commercial (for Wall Mounted IDU) 30K & 36K BMS500-AAS030-1CSXRB, BMS500-AAS036-1CSXRB Figure 25 Number...
  • Page 34 3 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.5.9 PCB: Light Commercial (for Cassette & Ducted IDU) 36K BMS500-AAS030-1CSXRB, BMS500-AAS036-1CSXRB Figure 26 Data subject to change 05.2025 | Bosch Thermotechnology Corp.
  • Page 35 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 35 8.5.10 IPM: Light Commercial (for Cassette & Ducted IDU) 36K BMS500-AAS030-1CSXRB, BMS500-AAS036-1CSXRB Figure 27 Bosch Thermotechnology Corp. |05.2025 Data subject to change...
  • Page 36 3 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.5.11 PCB: Light Commercial 48K & 60K BMS500-AAS048-1CSXLB, BMS500-AAS060-1CSXLB Figure 28 Data subject to change 05.2025 | Bosch Thermotechnology Corp.
  • Page 37 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 37 8.5.12 IPM: Light Commercial 48K & 60K BMS500-AAS048-1CSXLB, BMS500-AAS060-1CSXLB Figure 29 Bosch Thermotechnology Corp. |05.2025 Data subject to change...
  • Page 38 3 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual After power on, LED3 (Green color) and LED2 (Red color) will be flashing if the unit has some problems. Problems LED3 (Green) LED2 (Red)

  • Page 39: Indoor Wiring Diagram

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 39 8.6 Indoor Wiring Diagram 8.6.1 Indoor Wiring Diagram_Wall Mounted Unit Figure 30 Bosch Thermotechnology Corp. |05.2025 Data subject to change...
  • Page 40 4 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.6.2 Indoor Wiring Diagram_4-Way Cassette Unit 9K, 12K, 18K & 24K models Figure 31 36K & 48K models Figure 32 Data subject to change...
  • Page 41 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 41 8.6.3 Indoor Wiring Diagram_4-Ducted Unit 9K, 12K, 18K & 24K models FAN FOR THE Alarm Remote FRESH AIR Output Control NOTE: Remove the short connector of J7 when you use the "on-off"...
  • Page 42 4 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.6.4 4-Way Cassette & Ducted IDU Connector & Dip-Switch Introduction 4-Way Cassette Unit Connector (9K ~ 48K) For remote control (ON-OFF) terminal port CN23 and short connector of JR6: Figure 35 Remove the short connector of JR6 when you use ON-OFF function;...

  • Page 43: Setting Fan Speed

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 43 For ALARM terminal port CN33: Figure 37 The terminal port is available to connect ALARM, but power supply is not from the Indoor Unit (Fig. 38).
  • Page 44 4 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Micro-switch SW2 is for selection of indoor FAN ACTION if room temperature Micro-switch SW6 is for selection of temperature compensation in heating mode.
  • Page 45 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 45 4-Way Cassette Unit Dip-Switch (36K & 48K) Micro-switch SW3 is for selection of auto-restart function. Range: Active, inactive Micro-switch SW1 is for selection of indoor fan stop temperature (TEL0) when it is in anti-cold wind action in heating mode.
  • Page 46 4 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Ducted Unit connector (9K ~ 60K) Micro-switch S1 and dial-switch S2 are for address setting when you want to control this unit by a central controller.
  • Page 47 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 47 For ALARM terminal port CN33: The terminal port is available to connect ALARM, but power supply is not from the Indoor Unit (Fig. 58).
  • Page 48 4 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Ducted Unit Dip-Switch (9K ~ 24K) Micro-switch SW6 is for selection of temperature compensation in heating mode. This helps to reduce the real temperature difference between ceiling and floor so Micro-switch SW1 is for selection of indoor fan stop temperature (TEL0) when it is that the unit could run properly.
  • Page 49 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 49 Ducted Unit Dip-Switch (36K~ 60K) Micro-switch SW5 is for setting the master or slave unit when the unit is in twin connection. Micro-switch SW1 is for selection of indoor fan stop temperature (TEL0) when it is Range: Master no slave (Normal 1 drive 1 connection), Master (2 in anti-cold wind action in heating mode.
  • Page 50 5 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 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 70 Dial-switch ENC1: The indoor PCB is universal designed for whole series units from 18K to 55K.

  • Page 51: Outdoor Wiring Diagram

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 51 8.7 Outdoor Wiring Diagram 8.7.1 Regular Single Zone (9K & 12K) Figure 72 Bosch Thermotechnology Corp. |05.2025 Data subject to change...
  • Page 52 5 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.7.2 Regular Single Zone (18K & 24K) & Max Performance Single Zone (9K, 12K & 18K) Figure 73 Data subject to change 05.2025 | Bosch Thermotechnology Corp.
  • Page 53 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 53 8.7.3 Max Performance Single Zone (24K) Light Commercial Single Zone (30K & 36K for Wall Mounted IDU) Figure 74 Bosch Thermotechnology Corp. |05.2025 Data subject to change...
  • Page 54 5 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.7.4 Light Commercial Single Zone (36K for Cassette and Ducted IDU) Figure 75 Data subject to change 05.2025 | Bosch Thermotechnology Corp.
  • Page 55 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 55 8.7.5 Light Commercial Single Zone (48K & 60K) Figure 76 Bosch Thermotechnology Corp. |05.2025 Data subject to change...

  • Page 56: Diagnosis And Solution

    5 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8 Diagnosis and Solution 8.8.1 EEPROM parameter error diagnosis and solution(E0/F4) Error Code E0 (indoor) / F4 (outdoor) Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
  • Page 57 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 57 8.8.2 Indoor / outdoor unit’s communication diagnosis and solution (E1) Applicable models: Wall Mounted IDU System: 9K ~ 36K Cassette IDU System: 9K ~ 24K...
  • Page 58 5 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Remark: Remark: Use a multimeter to test the DC voltage between 2 port and 3 port of Use a multimeter to test the resistance of the reactor which does not outdoor unit.
  • Page 59 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 59 Applicable models: Cassette IDU System: 36K ~ 48K Ducted IDU System: 36K ~ 60K Error Code Indoor unit does not receive the feedback from outdoor unit for 60 seconds or outdoor unit does not Malfunction decision conditions receive feedback from indoor unit for 120 seconds.
  • Page 60 6 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.3 Zero crossing detection error diagnosis and solution (E2) Error Code When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time Malfunction decision conditions interval is abnormal.
  • Page 61 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 61 8.3.4 Fan speed has been out of control diagnosis and solution (E3 / F5) Error Code E3 (indoor) / F5 (outdoor) When indoor / outdoor fan speed is too low or too high for certain time, the unit will stop and the LED Malfunction decision conditions will display the failure.
  • Page 62 6 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Index 1: Indoor or Outdoor DC Fan Motor (control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector.
  • Page 63 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 63 8.8.5 Open circuit or short circuit of temperature sensor diagnosis and solution (E4 / E5 / F1 / F2 / F3 / P7) Error Code...
  • Page 64 6 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.6 Refrigerant Leakage Detection diagnosis and solution (EC) Error Code Define the initial evaporator coil temperature T2 when the compressor just starts running as Tcool.
  • Page 65 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 65 8.8.7 Water-level Alarm Malfunction diagnosis and solution (EE) Error Code Malfunction decision conditions If the sampling voltage is not 5V, the LED will display the failure code.
  • Page 66 6 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.8 Overload current protection diagnosis and solution (F0) Error Code Malfunction decision conditions An abnormal current rise is detected by checking the specified current detection circuit.

  • Page 67: Replace The Compressor

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 67 8.8.9 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0) Error Code When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show Malfunction decision conditions “P0”...
  • Page 68 6 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Figure 94 Figure 95 Data subject to change 05.2025 | Bosch Thermotechnology Corp.
  • Page 69 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 69 Figure 96 Figure 97 Bosch Thermotechnology Corp. |05.2025 Data subject to change...
  • Page 70 7 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.10 Over voltage or too low voltage protection diagnosis and solution (P1) Error Code Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
  • Page 71 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 71 8.8.11 High temperature protection of IPM module or compressor top diagnosis and solution (P2) Error Code Malfunction decision conditions If the sampling voltage is not 5V, the LED will display the failure.
  • Page 72 7 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.12 Inverter compressor drive error diagnosis and solution (P4) Error Code An abnormal inverter compressor drive is detected by a special detection circuit, including...
  • Page 73 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 73 8.8.13 Low pressure protection (P6) Error Code When the pressure of the system reaches a certain value, the low pressure protector will switch off.
  • Page 74 7 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.14 High temperature protection of indoor coil in heating mode (J0) Error Code When evaporator coil temperature is more than 140°F (60°C), the unit stops. It starts again only when Malfunction decision conditions the evaporator coil temperature is less than 129°F (54°C).
  • Page 75 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 75 8.8.15 High temperature sensed at outdoor coil (J1) Error Code When the outdoor pipe temperature is more than 149°F (65°C), the unit stops. It starts again only when Malfunction decision conditions the outdoor pipe temperature is less than 126°F (52°C).
  • Page 76 7 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.16 High temperature sensed at compressor discharge line (J2) Error Code When the compressor discharge temperature (T5) is more than 239°F (115°C) for 10 seconds, the Malfunction decision conditions compressor will stop and not restart until T5 is less than 194°F (90°C).
  • Page 77 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 77 8.8.17 PFC module protection (J3) Error Code IPM sends abnormal voltage signal to compressor driver chip, the display will show error code "J3" and Malfunction decision conditions system will stop operation.
  • Page 78 7 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.18 Communication error between outdoor unit main PCB and IPM control (J4) Error Code Malfunction decision conditions Communication error between outdoor PCB chip and compressor driven chip...
  • Page 79 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 79 8.8.19 High pressure switch open (J5) Error Code Malfunction decision conditions If the sampling voltage is not 5V, the LED displays a failure code.
  • Page 80 8 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.20 Low pressure switch open (P6/J6) Error Code J6/P6 Malfunction decision conditions If the sampling voltage is not 5V, the LED displays a failure code.
  • Page 81 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 81 8.8.21 AC Voltage protection (J8) Error Code Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
  • Page 82 8 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 8.8.22 Main Parts Check Temperature sensor check WARNING: ELECTRICAL HAZARD f Be sure to turn off all power supplies or disconnect all wires to avoid electric shock.
  • Page 83 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 83 Appendix 1 Resistance to Temperature value table for resistive sensors: T1,T2,T3,T4 (°C/K Ohm) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C...
  • Page 84 8 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Appendix 2 Resistance to Temperature value table for resistive sensors: T5 (°C/K Ohm) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C...
  • Page 85 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 85 Compressor check Measure the resistance value of each winding by using the tester. Figure 112 Figure 113 Resistance Value 36K Light Position 30K Light...
  • Page 86 8 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual IPM continuity check WARNING: ELECTRICAL HAZARD f Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before trouble shooting.
  • Page 87 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 87 Suction pressure at the service port Cooling chart: °F (°C) IDT / ODT 75 (23.89) 85 (29.44) 95 (35) 105 (40.56) 115 (46.11) 70/59 10.1...

  • Page 88: Disassembly Guide

    8 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 9 Disassembly Guide 9.1.2 How to remove the horizontal louver Step 1: Open the horizontal louver and push the hook towards left to open it.
  • Page 89 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 89 9.1.3 How to disconnect indoor display board 9.1.4 How to remove the panel assembly Step 1: Remove 1 screw and then remove the electrical cover.
  • Page 90 9 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 9.1.5 How to remove the PCB Hooks Step 1: Remove the front panel. Step 2: Cut the zip-tie, then pull out the coil temperature sensor (T2).
  • Page 91 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 91 Step 5: Remove the cap of the connectors. Step 8: Open the two clips on the front of the control box. Figure 130 Step 9: Disconnect the PCB board from the control box.
  • Page 92 9 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Step 11: Pull out the PCB board. Step 2: Remove the 1 screw on the evaporator located at the fixed plate. Screw Display board...
  • Page 93 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 93 9.1.6 How to remove the fan and fan motor 9.1.7 How to remove the stepper motor Step 1: Remove the front panel, electrical parts and evaporator. (refer to Step 1: Remove the front panel and electrical parts (refer to previous previous sections).

  • Page 94: Indoor Unit - 4-Way Cassette

    9 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 9.2 Indoor Unit - 4-Way Cassette 9.2.2 How to remove the panel 9.2.1 How to remove the filter Step 1: Open decorative grille following instruction from previous section.
  • Page 95 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 95 9.2.3 How to remove the indoor unit display Step 3: Remove 1 screw to remove louver motor. Step 1: Open decorative grill and remove the panel by following previous sections.
  • Page 96 9 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 9.2.7 How to remove the fan wheel Step 4: Uncouple two tabs fixing the PCB and remove PCB. Step 1: Open the decorative grille and remove the PCB by following previous sections.
  • Page 97 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 97 9.2.8 How to remove the fan motor 9.2.9 How to remove the water collecting assembly Step 1: Remove the decorative grille and electrical control box and fan Step 1: Remove the decorative grille, panel and electrical control box wheel by following previous sections.
  • Page 98 9 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 9.2.9 How to remove the condensate pump Step 4: Remove 2 screws under the pump supporter that are holding the pump. Remove them to take the condensate pump out of the supporter.

  • Page 99: Indoor Unit - Medium & High Static Ducted Unit

    Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 99 9.2.10 How to remove the evaporator 9.3 Indoor Unit - Medium & High Static Ducted Unit 9.3.1 How to remove the electrical control box Step 1: Remove the decorative panel, electrical control box and water collecting assembly by following previous sections.
  • Page 100 1 0 0 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 9.3.2 How to remove the PCB Step 3: Remove 1 screw to disassemble the reactance Step 1: Remove the electrical control box cover by following previous section.
  • Page 101 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 101 9.3.5 How to remove the fan and fan motor Step 4: Remove 2 screws to disassemble fan. Step 1: Remove the electrical control box cover by following previous section.

  • Page 102: Top Cover

    1 0 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual 9.3.6 How to remove the water collecting assembly Step 3: Remove 2 screws and disassemble the pipe clamp. Step 1: Remove the top cover board by following previous section.
  • Page 103 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 103 Online Help Resources 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.
  • Page 104 1 0 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units Service Manual Data subject to change 05.2025 | Bosch Thermotechnology Corp.
  • Page 105 Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Indoor Units | 105 Bosch Thermotechnology Corp. |05.2025 Data subject to change...
  • Page 106 United States and Canada Bosch Thermotechnology Corp. 65 Grove Street Watertown, MA 02472 Tel: 800-283-3787 www.bosch-homecomfort.us BTC 769002301 C /05.2025...

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