Mitsubishi Electric PQRY-P120THMU-A User Manual

Initial checks and safety precautions before servicing operations.

Lists essential tools and materials for installation and servicing.

Details liquid phase refrigerant charging procedure.

Guidance on addressing refrigerant leaks.

Summarizes compatible indoor units and capacities for heat source units.

Details switch settings and address assignments for system components.

Describes main components and refrigerant flow path of the heat source unit.

Compares features and specifications of MA and ME remote controllers.

Provides detailed wiring diagrams for the heat source unit.

Presents wiring diagrams for the BC controller.

Illustrates the refrigerant flow path within the system.

Describes main components and their functions in the refrigerant circuit.

Details control methods and operation sequences for the heat source unit.

Lists essential checks before initiating a test run.

Details test run procedure using the remote controller.

Guidance on adjusting refrigerant levels based on symptoms.

A comprehensive list of error codes, their definitions, and applicable units.

Procedures for identifying and repairing refrigerant leaks.