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Bosch BMS500-AAU018-1AHDXB - User Manual

Bosch BMS500-AAU018-1AHDXB
104 pages
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Service Manual
Ductless Air Conditioner / Heat Pump
Multi Zone Outdoor Units
Climate 5000 Series
BTC 769102304 A / 01.2023
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.

Table of Contents

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Bosch BMS500-AAU018-1AHDXB Specifications

General IconGeneral
BrandBosch
ModelBMS500-AAU018-1AHDXB
CategoryAir Conditioner
LanguageEnglish

Summary

Key to Symbols and Safety Instructions

Key to Symbols

Explains warning symbols and keywords used in the document.

Safety

Provides essential safety precautions before installation and operation of the unit.

Part Names and Model Numbers

Outdoor Models

Lists outdoor unit models with their voltage, capacity, and max zone configurations.

Indoor Models

Lists various indoor unit models with their specifications and types.

Multizone Configurations

Details possible indoor unit combinations for different outdoor unit capacities.

Dimensions

Outdoor Unit

Provides mounting dimensions and overall unit dimensions for outdoor units.

Refrigerant Cycle Diagrams - Outdoor Models

18 K Multi Zone Regular System

Illustrates the refrigerant cycle for a specific outdoor unit model.

18 K Multi Zone Max Performance System

Shows the refrigerant cycle diagram for another 18K model.

27 K Multi Zone Models

Displays the refrigerant cycle for 27K models.

36 K Multi Zone Regular System

Shows the refrigerant cycle for the 36K Regular model.

36 K Multi Zone Max Performance System

Illustrates the refrigerant cycle for the 36K Max Performance model.

48 K Multi Zone Regular System

Details the refrigerant cycle for the 48K Regular model.

48 K Multi Zone Max Performance System

Presents the refrigerant cycle for the 48K Max Performance model.

Wiring Diagrams

18 K Multi Zone Regular System

Provides the wiring diagram for the 18K Regular system model.

18 K Multi Zone Max Performance System

Shows the wiring diagram for the 18K Max Performance model.

27 K Multi Zone Models

Wiring diagrams for the 27K models.

36 K Multi Zone Regular System

Wiring diagram for the 36K Regular system.

36 K Multi Zone Max Performance System

Wiring diagram for the 36K Max Performance system.

48 K Multi Zone Regular System

Wiring diagram for the 48K Regular system.

48 K Multi Zone Max Performance System

Wiring diagram for the 48K Max Performance system.

Installation Details

Torque Requirements

Specifies torque values for tube connections during installation.

Connecting the Cables

Details cable specifications and AWG wire sizes for unit connections.

Pipe Length and the Elevation

Outlines maximum piping lengths and height differences for installation.

First Time Installation

Provides steps for initial installation and system setup.

Adding the Refrigerant to an Existing System

Provides instructions for adding refrigerant to an existing system.

Collecting the Refrigerant Into the Outdoor Unit

Details the procedure for collecting refrigerant into the outdoor unit.

Evacuation of the Complete Refrigeration Circuit, Indoor and Outdoor Unit.

Explains the process of evacuating the entire refrigeration circuit.

Operation Characteristics

Lists operating temperature ranges for cooling, heating, and dry modes.

Electronic Functions

Abbreviation

Defines abbreviations for sensors and components.

Electric Control Working Environment

Specifies electrical parameters like input voltage and working amps.

Main Protection

Details the unit's primary protection mechanisms and functions.

Control and Functions

Covers overall control logic and operational functions.

Defrost Control

Explains the conditions and actions for defrosting the unit.

Outdoor Fan Control

Describes how the outdoor fan speed is controlled.

Electronic Expansion Valve (EXV)

Details the operation and control of the electronic expansion valve.

Four-Way Valve Control

Explains the control logic for the four-way valve.

Outdoor Unit Digital Display

Describes the codes displayed on the outdoor unit's digital display.

Point check function (engineering troubleshooting mode)

Explains how to use the point check function for troubleshooting.

Troubleshooting

Outdoor Unit Error Codes

Lists and explains various error codes displayed by the outdoor unit.

Quick Check by Error Codes

Provides a quick reference table for checking causes of error codes.

ODU PCB & IPM

Details PCB and IPM board information and diagrams.

Outdoor Unit Display

Explains the outdoor unit's display and point check function.

Diagnosis and Solution

Provides troubleshooting steps for various error codes and malfunctions.

Main Parts Check

Temperature sensor check

Explains how to check temperature sensors using a multimeter.

Compressor check

Details how to check compressor winding resistance.

IPM continuity check

Explains how to perform IPM continuity checks.

Four - Way Valve Check

Describes voltage and resistance checks for the four-way valve.

EXV check

Explains how to check the resistance value on the EXV coil.

Disassembly Guide

Outdoor Unit - BMS500-AAM018-1 CSXRC

Step-by-step guide for disassembling the BMS500-AAM018-1CSXRC outdoor unit.

Outdoor Unit - BMS500-AAM027-1 CSXRC, BMS500-AAM018-1 CSXHC, BMS500-AAM027-1 CSXHC

Disassembly guide for specific BMS500 outdoor unit models.

Outdoor Unit - BMS500-AAM036-1 CSXHC, BMS500-AAM048-1 CSXRC, BMS500-AAM048-1 CSXHC

Disassembly guide for specific BMS500 outdoor unit models.

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