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General| Brand | Hitachi |
|---|---|
| Model | RAM-65QH5 |
| Category | Air Conditioner |
| Language | English |
General safety guidelines and warnings for service personnel.
Standards for handling semiconductors to prevent damage.
Important cautionary notes for operation and maintenance.
Detailed technical specifications for the outdoor unit model.
Specifications for dual system indoor unit combinations.
Specifications for triple system indoor unit combinations.
Cooling/heating capacity for dual system indoor unit combinations.
Cooling/heating capacity for triple system indoor unit combinations.
Lists compatible indoor units for dual system configuration.
Lists compatible indoor units for triple system configuration.
Specifies outdoor unit connection points for dual system.
Specifies outdoor unit connection points for triple system.
Guidelines for pipe length, height difference, and mounting.
Provides dimensional drawings and required service space for the outdoor unit.
Technical data for fan motor and compressor.
Shows cooling and heating capacity based on ambient temperature.
Illustrates capacity change ratio based on piping length.
Noise level data for heating and cooling operation across frequency bands.
Detailed wiring schematic for the outdoor unit's electrical connections.
Schematic diagram illustrating the remote control system's circuitry.
High-level functional blocks of the outdoor unit's system.
Explains the functions and settings for basic operation modes.
Details the conditions required to start and release defrost mode.
Specifies the conditions necessary for activating auto-fresh defrost.
Describes the conditions and operation status for forced cooling.
Outlines conditions for restricting compressor speed due to overheat.
Schematic of the refrigerant flow for cooling, dehumidifying, and defrosting.
Schematic of the refrigerant flow for heating operation.
Details the operation of the power circuit including rectifying and boosting.
Illustrates the circuit diagram of the system power module.
Explains the functions of the switching power supplies for control and valves.
Describes collector voltage of Q831 under different operation conditions.
Schematic for detecting the rotor's magnetic pole position for motor control.
Explains basic operations of peak current cut, overload, and reset circuits.
Details the system configuration for overload control.
Describes the reset circuit's function and voltage waveforms.
Details the role and connection points of various thermistors.
Provides reference values for thermistor resistance and corresponding temperatures.
Explains valve drive, switching, and waveform analysis.
Describes the control method for achieving high power factor.
Guides on interpreting LED indicators for diagnosing issues.
Step-by-step guides for diagnosing and resolving unit malfunctions.
Instructions for operating the outdoor unit using the service switch.
Step-by-step guide for removing and reinstalling electrical components.
Instructions for removing expansion valves, condenser, and reversing valve.
Comprehensive list of part numbers and descriptions for RAM-55QH5.
Comprehensive list of part numbers and descriptions for RAM-65QH5.
