Bosch BMS500-AAS018-1CSXHC 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.

Bosch BMS500-AAS018-1CSXHC Specifications

General

Brand	Bosch
Model	BMS500-AAS018-1CSXHC
Category	Air Conditioner
Language	English

Summary

1 Key to Symbols and Safety Instructions

1.2 Safety

Crucial safety precautions for installation and operation.

5 Installation Details

5.4 First Time Installation

5.4.1 Air Purging with Vacuum Pump

6.3 Main Protection

6.3.1 Compressor three-minute delay at restart

Describes the compressor restart delay mechanism.

6.3.3 Automatic shutoff based on fan speed

Details protection activated by abnormal indoor fan speeds.

6.4.4 Defrost mode

6.4.4.1 Evaporator coil temperature protection

6.4.21 Point check function (engineering troubleshooting mode)

To enter engineer mode

Instructions for accessing the engineering troubleshooting mode.

7 Troubleshooting

Safety

Crucial safety warnings related to electrical hazards during troubleshooting.

7.1 Error Codes - Ducted Indoor Unit

7.2 Quick Check by Error Codes

Part requiring replacement

Identifies parts to check or replace based on error codes.

7.3 ODU PCB & IPM

7.3.1 PCB: Regular 115V Single Zone 12K

7.4 Indoor Wiring Diagram

7.4.1 4-Ducted Unit - 9K, 12K, 18K & 24K models

7.5 Outdoor Wiring Diagram

7.5.1 Regular Single Zone (115V 12K)

7.6 Wall Mounted Unit (IDU & ODU) Error Code Diagnosis and Solution

Solution

Provides solutions for various error codes and their causes.

7.6.1 EEPROM parameter error diagnosis and solution (EH 00/EH OR/EC 51)

7.6.2 Indoor/outdoor unit's communication diagnosis and solution (EL 01)

7.6.4 Fan speed has been out of control diagnosis & solution (EH 03/EC 07)

7.6.5 Open circuit or short circuit of temperature sensor diagnosis and solution (EC 52/EC 53/EC 54/EC 56/EH 60/EH61)

7.6.6 Refrigerant Leakage Detection diagnosis and solution (EL OC)

7.6.8 Overload current protection diagnosis and solution (PC 08)

7.6.9 IPM malfunction or IGBT over-strong current protection diagnosis and solution (PC 00)

7.6.10 Over voltage or too low voltage protection diagnosis and solution (PC 01)

7.6.11 Top temperature protection of compressor or High temperature protection of IPM module or High pressure protection diagnosis and solution (PC 02)

7.6.12 Inverter compressor drive error diagnosis and solution (PC 04)

7.6.13 Low pressure protection diagnosis and solution (PC 03)

Malfunction decision conditions

Conditions indicating low pressure protection.

7.6.15 Main Parts Check

Temperature sensor check

Procedure for checking temperature sensor resistance values.

Compressor check

Table 48

Resistance values for compressor windings across different models.

IPM continuity check

WARNING: ELECTRICAL HAZARD

Electrical hazard warning before checking IPM continuity.

8 Disassembly Guide

8.1 Indoor Unit - Medium & High Static Ducted Unit

Guide for disassembling the indoor unit.

8.1.1 How to remove the electrical control box

Steps to remove the electrical control box cover and components.

8.1.5 How to remove the fan and fan motor

Step 2: Remove 10 screws to disassemble top cover.

8.2 Outdoor Unit

8.2.1 Panel Plates

8.2.3 Fan Assembly

8.2.4 Fan Motor

1. Remove the fixing screws of the fan motor (4 screws).

8.2.7 Compressor

1. Remove the flange nut of terminal cover and remove the terminal cover.