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EN
SERVICE MANUAL
UNI SPLIT SERIES
ASC-xxBI, ASD-xxBI, ASF-xxBI,
ASGE-xxBI, ASGE-xxBI-3

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Table of Contents
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Summarization of Contents

Safety Notices
Safety Notice on Maintenance
Safety guidelines for maintenance operations.
Safety Notice on Operation
Safety instructions for unit operation.
Product Introduction
Lists of Units
Overview of available indoor and outdoor unit models.
Electrical Parameters
Power supply and wiring specifications.
Control
Operation Mode
Explains different operational modes like cooling and heating.
Control Modes and Functions
Details on compressor, fan, valve controls, and special functions.
Protection Controls
Explains protection mechanisms like high/low pressure and temperature limits.
Debugging Functions
Settings for freeze protection, refrigerant leak detection, and fan modes.
Centralized Control Interface
Integration with centralized control systems.
Troubleshooting
Wiring Diagrams
Electrical schematics for outdoor and indoor units.
PCB Layout and Error Codes
Component layout on PCBs and list of unit error codes.
Troubleshooting Common Errors (E1-E9)
Guides for resolving errors E1 through E9.
Troubleshooting Other Errors (Lc-PH)
Guides for resolving errors like startup failure, unmatched units, and protection modes.
Troubleshooting Failures Without Error Codes
Addresses issues not indicated by error codes and general performance problems.
Maintenance
System Diagram & Vacuum Pumping
Visualizes the refrigerant circuit and details line evacuation procedures.
Refrigerant Charging
Step-by-step instructions for charging refrigerant.
Major Component Removal (ODU)
Procedures for removing and replacing key outdoor unit components.
Major Component Removal (IDU)
Procedures for removing components from indoor units (cassette, duct, floor ceiling).
Floor Ceiling Unit Component Removal
Procedures for removing components from floor ceiling indoor units.
Appendices
Sensor Data Lists
Tables showing resistance/voltage data for temperature sensors.
Refrigerant Information & Tools
Data on refrigerant properties and required operation tools.

Table of Contents