Mitsubishi Electric SEZ Series User Manual

Covers warnings for R32 refrigerant, general safety, and new refrigerant handling procedures.

Details cautions for service operations and additional refrigerant charging procedures.

Specific safety guidelines for units utilizing R32 refrigerant, including work area and checks.

Lists and specifies the essential service tools required for R32/R410A refrigerant operations.

Identifies key components of the indoor unit for the SEZ-M series.

Explains the display modes and functions of the wired remote controller (PAR-41MAA).

Details the controller interface, button functions, and basic operation.

Outlines the navigation and options available within the remote controller menu system.

Describes the maintenance and service functions accessible via the remote controller.

Details settings for operation modes, timers, and energy-saving functions.

Explains settings for clock, display, initialization, and error information.

Illustrates the display and functions of the wireless remote controller.

Technical specifications for the SEZ-M25DA(L)2 indoor unit, including power, airflow, and sound.

Technical specifications for the SEZ-M35DA(L)2 indoor unit, including power, airflow, and sound.

Technical specifications for the SEZ-M50DA(L)2 indoor unit, including power, airflow, and sound.

Technical specifications for the SEZ-M60DA(L)2 indoor unit, including power, airflow, and sound.

Technical specifications for the SEZ-M71DA(L)2 indoor unit, including power, airflow, and sound.

Presents noise level data across different octave bands for various static pressures.

Details the performance curves of the indoor fan for different models and static pressures.

Provides overall dimensions and locations for piping and electrical connections.

Illustrates required clearances for maintenance and installation access.

Shows the internal wiring schematic of the control box and component connections.

Details the configuration settings for DIP switches on the indoor controller board.

Illustrates the refrigerant flow within the system during cooling and heating operations.

Important safety and procedural notes to follow before and during troubleshooting.

Provides a summary of check codes, their symptoms, and initial service actions.

Step-by-step guide to perform self-diagnosis using the remote controller.

Lists error codes, their corresponding symptoms, and remarks for indoor unit issues.

Explains the meaning of LED indicators on the indoor controller board.

Detailed table linking error codes to abnormal points, causes, and countermeasures.

Addresses troubleshooting based on abnormal phenomena like LED blinking or power issues.

Diagrams and descriptions of test points on the indoor controller board for diagnostics.

Defines normal/abnormal resistance and voltage criteria for key components.

Procedure for diagnosing and resolving issues related to the DC fan motor and its circuit.

Instructions for removing the control box cover and the intake air thermistor.

Procedure for removing the air filter, bottom plate, and drainpan.

Steps for removing the heat exchanger cover and replacing thermistors.

Detailed instructions for disassembling the fan casing and removing the fan motor.

Procedure for removing bearings (specific models) and the heat exchanger.