Bosch BMS500-AAM048-1CSXRC User Manual

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.

Bosch BMS500-AAM048-1CSXRC Specifications

General

Cooling Capacity	48000 BTU/h
Voltage	208/230V
Refrigerant	R410A
Power Supply	1 Phase
Operating Temperature Range (Cooling)	115°F

Summary

Key to Symbols and Safety Instructions

Safety Precautions

Wiring Diagrams

Installation Details

Torque Requirements

First Time Installation

Adding the Refrigerant to an Existing System

Collecting the Refrigerant Into the Outdoor Unit

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

Electronic Functions

Main Protection

Lists various protection mechanisms for the unit.

Temperature Protection of Compressor Discharge

Fan Speed Malfunction

Inverter Module Protection

Low Voltage Protection

Compressor Current Limit Protection

Indoor / Outdoor Units Communication Protection

High Condenser Coil Temp. Protection

Outdoor Unit Anti-Freezing Protection

Low Outdoor Ambient Temperature Protection

Outdoor Fan Control

Defrost Control

Electronic Expansion Valve (EXV) - Max Performance 48K

Point Check Function (Troubleshooting)

Troubleshooting

Safety Warnings

Electrical hazard warnings and precautions related to capacitors.

Outdoor Unit Error Codes

Lists and explains error codes for outdoor units.

Quick Check by Error Codes

Provides a quick reference for troubleshooting based on error codes.

Outdoor Unit Display & Checks

Diagnosis and Solution

Provides diagnostic steps and solutions for common issues.

EEPROM Parameter Error (EC 51)

Troubleshooting for EEPROM parameter errors.

Indoor/Outdoor Communication Error (EL 01)

Troubleshooting for indoor/outdoor communication errors.

IPM Board Communication Error (PC 40)

Troubleshooting for IPM and main control board communication errors.

Sensor Malfunction Errors

Troubleshooting for temperature sensor malfunctions.

Voltage Protection Errors (PC 10/11/12)

Troubleshooting for voltage protection errors.

PFC Module Protection Error (PC 0F)

Troubleshooting for PFC module protection errors.

Outdoor Fan Speed Malfunction (EC 07/ EC 71)

Troubleshooting for outdoor fan speed issues.

High Pressure Protection (PC 30)

Troubleshooting for high pressure protection errors.

Low Pressure Protection (PC 31)

Troubleshooting for low pressure protection errors.

Current Overload/Speed Control Errors

Troubleshooting for current overload and speed control issues.

Compressor Discharge Temperature Protection (PC 06)

Troubleshooting for compressor discharge temperature protection.

High Condenser Temperature Protection (PC 0A)

Troubleshooting for high condenser temperature protection.

Inverter Module Malfunction (P6)

Troubleshooting for inverter module (IPM) malfunctions.

Compressor Top Temperature Protection (PC 02)

Troubleshooting for compressor top temperature protection.

Outdoor DC Fan Motor Phase Failure (EC 72)

Troubleshooting for outdoor DC fan motor phase failure.

Compressor Lack Phase Protection (PC 43)

Troubleshooting for compressor lack phase protection.

Outdoor Unit IR Chip Drive Failure (PC 45)

Troubleshooting for outdoor unit IR chip drive failures.

Adapter/Main Control Board Communication Error (ODU Ed)

Troubleshooting for communication errors between boards.

Temperature Sensor Check

Procedure for checking temperature sensors.

Compressor Check

Method for checking compressor winding resistance.

IPM Continuity Check

Procedure for checking IPM continuity.

Four-Way Valve Check

Checks for four-way valve voltage and resistance.

EXV Check

Disassembly Guide

Outdoor Unit - BMS500-AAM018-1CSXRC

Removing Panel Plates

Outdoor Unit - BMS500-AAM027, BMS500-AAM018

Outdoor Unit - BMS500-AAM036, BMS500-AAM048

Removing Fan Assembly

Removing Panel Plate

Removing Electrical Parts

Removing Compressor

Removing 4-Way Valve

Removing Expansion Valve