Bosch BMS500-AAS024-1CSXRC - User Manual

Service Manual
Ducted Type (Medium & High Static)
Air Conditioner / Heat Pump
Climate 5000 Series
BTC 769102303 A / 11.2022
WARNING:
 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.
 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.
 Only contact a licensed contractor for repair
or maintenance of this unit.

Summary

Key to Symbols and Safety Instructions

Understanding Warning Symbols

General Safety Precautions

Outlines essential safety guidelines for installation and operation.

Dimensions & Clearances

Installation Details

Installation Torque Specifications

Cable and Pipe Installation Requirements

First Time and Re-Installation Procedures

Guides for initial air purging, refrigerant addition, and re-installation.

Troubleshooting Overview

Troubleshooting Safety Precautions

Highlights electrical hazards and safety measures before troubleshooting.

Error Codes and Quick Checks

Lists error codes for ducted units and provides quick checks by error code.

Indoor Unit Wiring Diagrams

Outdoor Unit Wiring Diagrams

Specific Error Code Diagnosis and Solutions

IDU & ODU Error Code Diagnosis and Solutions

Provides general troubleshooting for IDU/ODU error codes.

EEPROM Parameter Error Diagnosis and Solution

Troubleshooting steps for EEPROM parameter errors (EH 00/EH OR/EC 51).

Indoor;Outdoor Unit Communication Diagnosis and Solution

Troubleshooting steps for communication errors (EL 01).

Zero Crossing Detection Error Diagnosis and Solution

Fan Speed Control Diagnosis and Solution

Troubleshooting steps for fan speed control issues (EH 03/EC 07).

Refrigerant Leakage Detection Diagnosis and Solution

Troubleshooting steps for refrigerant leakage detection (EL OC).

Indoor PCB; Display Board Communication Error Diagnosis and Solution

Overload Current Protection Diagnosis and Solution

Troubleshooting steps for overload current protection (PC 08).

IPM Malfunction or IGBT Over-strong Current Protection Diagnosis and Solution

Troubleshooting for IPM malfunction or IGBT over-current protection (PC 00).

Over Voltage or Too Low Voltage Protection Diagnosis and Solution

Troubleshooting for voltage protection issues (PC 01).

Compressor Top Temperature Protection or High Temperature Protection Diagnosis and Solution

Troubleshooting for compressor or IPM module temperature protection (PC 02).

Inverter Compressor Drive Error Diagnosis and Solution

Troubleshooting for inverter compressor drive errors (PC 04).

Low Pressure Protection Diagnosis and Solution

Communication Error Between Outdoor Unit Main PCB and IPM Control Diagnosis and Solution

Temperature Sensor Diagnosis and Solution

Component Checks and Diagnosis

DC Fan Motor Checks

Compressor Winding Resistance Check

IPM Continuity Check

4-way Valve Voltage and Resistance Check

EXV Check

Disassembly Guide

Indoor Unit Disassembly Procedures

Outdoor Unit Component Removal Procedures

Bosch BMS500-AAS024-1CSXRC Specifications