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General| Brand | Mitsubishi Heavy Industries |
|---|---|
| Model | FDKNA251 |
| Category | Air Conditioner |
| Language | English |
Details key features and advantages of the Multi-Type V series air conditioners.
Explains the nomenclature used for identifying air conditioner models, including series and capacity.
Provides a matrix of available indoor unit types and their corresponding capacities.
Details compatible outdoor units with indoor unit capacities and branch pipe sets.
Lists detailed technical specifications for indoor units, including capacity, power, and dimensions.
Details refrigerant piping diagrams for twin and high-pressure twin type systems.
Provides charts for correcting cooling and heating capacity based on temperature and air flow.
Illustrates electrical wiring diagrams and component identification for indoor units.
Describes the wired remote controller's display, buttons, and functions for operation control.
Explains the features and operation of the wireless remote controller, including indicators and buttons.
Details operation control functions managed by the outdoor unit controller.
Details the compressor starting sequence based on operating mode and 4-way valve switching.
Explains outdoor fan speed control based on temperatures for different models and operations.
Explains the conditions and procedures for starting, changing, and ending the defrosting operation.
Details high pressure control mechanisms for heating, cooling, and abnormal conditions.
Explains the low pressure detection and abnormal stop conditions for specific models.
Describes how the system detects disconnected thermistors and the low pressure sensor.
Explains the protection control triggered by insufficient refrigerant volume.
Provides critical safety warnings and cautions for installation and operation.
Provides comprehensive guidance on installing indoor units, including location, space, and connections.
Provides guidance on selecting locations and procedures for installing remote controllers.
Guides on selecting optimal locations for remote controller installation, avoiding direct sunlight and humidity.
Provides comprehensive instructions for installing outdoor units, including location and space requirements.
Describes the procedures for conducting air tightness tests and purging air from the refrigerant system.
Specifies refrigerant charge amounts for factory shipping and additional charging based on piping length.
Specifies refrigerant charge amounts for factory shipping and additional charging based on piping length.
Covers essential servicing procedures including evacuation and refrigerant charging.
Details the process of charging refrigerant into the system after evacuation, including connecting hoses and checking for leaks.
Provides guidance on diagnosing and resolving issues within the refrigerant circuit based on pressure and temperature readings.
Details methods for diagnosing microcomputer circuit faults using self-diagnosis functions and error codes.
Guides on diagnosing compressor overcurrent issues by checking voltage, current, and settings.
Outlines troubleshooting for cooling overload, checking heat exchanger, refrigerant, and installation space.
Describes troubleshooting for discharge temperature errors, checking thermistors and control systems.
Explains how to diagnose defective outdoor heat exchanger thermistors by checking resistance and PCB connections.
Details troubleshooting for defective outdoor air temperature thermistors, checking connections and characteristics.
Guides on diagnosing defective discharge pipe thermistors by checking resistance and PCB connections.
Explains how to diagnose defective suction pipe thermistors by checking resistance and PCB connections.
Details troubleshooting for defective low pressure and high pressure sensors, checking connections and refrigerant levels.
Guides on diagnosing defective under-doom thermistors by checking resistance and PCB connections.
Explains how to diagnose insufficient refrigerant issues by checking service valves and thermistor characteristics.
Details troubleshooting for abnormal low pressure or sensor wire issues, checking connections and refrigerant levels.
