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SPLIT TYPE AIR CONDITIONER
INDOOR UNIT/OUTDOOR UNIT
R32
OUTDOOR UNIT
RAC-S25YHA
RAC-S35YHA
Instruction manual
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
MODEL
RAS-S25YHA/RAC-S25YHA
RAS-S35YHA /RAC-S35YHA
- 1 -
INDOOR UNIT
RAS-S25YHA
RAS-S35YHA
Page 1~36
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Table of Contents
Related Manuals for Hitachi RAS-S35YHA
Summarization of Contents
HITACHI SPLIT TYPE AIR CONDITIONER
MODEL IDENTIFICATION
Lists the available model numbers for the air conditioner.
SAFETY PRECAUTIONS
INSTALLATION SAFETY MEASURES
Details safety measures to be followed during the installation process of the unit.
SHIFTING AND MAINTENANCE SAFETY
Outlines safety precautions to take when moving or maintaining the air conditioner.
OPERATIONAL PRECAUTIONS
CRITICAL WARNINGS
Highlights critical safety warnings that must be strictly observed to prevent serious injury or death.
CAUTIONARY ADVICE
Provides cautionary advice to prevent potential damage or minor injuries during operation.
PRODUCT COMPONENTS AND FUNCTIONS
INDOOR UNIT COMPONENTS
Describes the various parts and their functions located on the indoor unit of the air conditioner.
OUTDOOR UNIT COMPONENTS
Details the components and their roles on the outdoor unit of the air conditioner.
INDOOR UNIT INDICATORS AND CONTROLS
OPERATION AND INDICATOR LAMPS
Explains the function of the yellow operation, green ECO sensor, and orange timer lamps.
TEMPORARY SWITCH USAGE
Details the use of the temporary switch for operating the unit when the remote is unavailable.
REMOTE CONTROLLER PREPARATION
BATTERY INSTALLATION
Step-by-step guide on how to install batteries into the remote controller for operation.
WALL MOUNTING
Instructions on how to mount the remote controller holder securely on a wall.
BATTERY AND CONTROLLER CARE
Provides important notes on battery usage and general care for the remote controller.
SETTING CALENDAR AND CLOCK
CALENDAR AND CLOCK NOTES
Important notes regarding the setting of calendar and clock for timer functions.
REMOTE CONTROLLER FUNCTIONS OVERVIEW
TRANSMITTER, SENSOR, AND DISPLAY
Describes the signal window, temperature sensor, and information display on the remote.
BASIC OPERATION BUTTONS
Explains the function of START/STOP, TEMPERATURE, FAN SPEED, and ECO buttons.
ADVANCED REMOTE CONTROLLER FUNCTIONS
SPECIAL MODES: POWERFUL, SILENT, AND SWING
Explains how to use POWERFUL, SILENT modes and control air swing direction.
REMOTE CONTROLLER USAGE PRECAUTIONS
Lists important precautions for handling and operating the remote controller.
AIR CONDITIONER OPERATING MODES
AUTO RESTART AND AUTOMATIC OPERATION
Explains auto-restart after power failure and automatic mode selection based on temperature.
HEATING OPERATION DETAILS
HEATING USAGE AND DEFROSTING
Provides guidelines for heating operation, including its performance and the defrosting process.
DEHUMIDIFYING OPERATION DETAILS
DEHUMIDIFYING MODE FUNCTIONALITY
Describes the conditions and behavior of the dehumidifying mode.
COOLING OPERATION DETAILS
COOLING USAGE AND AUTO FAN
Provides guidelines for cooling operation and explains automatic fan speed adjustment.
FAN AND AIR SWING OPERATIONS
FAN MODE AND AIR SWING CONTROL
Details how to use the fan mode and activate/deactivate vertical and horizontal auto swing features.
SWING OPERATION NOTES
Provides notes on operating deflectors during cooling/dehumidifying to prevent condensation.
POWERFUL OPERATION MODE
ACTIVATING AND DEACTIVATING POWERFUL MODE
Instructions on how to start, cancel, and notes regarding the POWERFUL operation.
SILENT OPERATION MODE
ACTIVATING AND DEACTIVATING SILENT MODE
How to start, cancel, and notes regarding the SILENT operation.
ECO OPERATION MODE
STARTING, CANCELLING, AND EFFECTIVENESS OF ECO MODE
Instructions on activating, deactivating, and notes on ECO operation.
SENSOR-BASED ECO OPERATION
STARTING AND CANCELLING SENSOR-DRIVEN ECO OPERATION
How to use the sensor to detect people and save energy, and how to cancel it.
LEAVE HOME (LH) OPERATION
STARTING, CANCELLING, AND NOTES FOR LEAVE HOME OPERATION
Instructions for operation, cancellation, and important notes.
CLEAN (ONE TOUCH CLEAN) OPERATION
STARTING, CANCELLING, AND NOTES FOR CLEAN OPERATION
How to start, stop, and notes regarding the one-touch clean operation.
ONCE TIMER (ON/OFF TIMER) OPERATIONS
SETTING AND CANCELLING VARIOUS TIMERS
How to set OFF, ON, ON/OFF timers and cancel reservations, with related notes.
ECO SLEEP TIMER OPERATION
STARTING AND CANCELLING ECO SLEEP TIMER
How to activate and deactivate the ECO SLEEP TIMER for energy saving.
COMBINED TIMER OPERATIONS
SETTING AND CANCELLING ECO SLEEP TIMER WITH ON TIMER
How to set and cancel combined ECO SLEEP TIMER and ON TIMER operations.
COMBINED TIMER OPERATION NOTES
Notes on interaction with other timer types.
WEEKLY TIMER PROGRAMMING
SETTING UP WEEKLY TIMER PROGRAMS
Instructions for setting up weekly timer programs, including modes, days, and program details.
WEEKLY TIMER PROGRAMMING DETAILS
CONFIGURING TIMER TYPE, TIME, AND TEMPERATURE
How to select timer type, set time, and desired temperature for weekly programs.
SAVING AND MANAGING WEEKLY TIMER RESERVATIONS
Explains saving reservations and important notes on priority and saving.
WEEKLY TIMER MODE ACTIVATION AND DEACTIVATION
SELECTING AND CONFIRMING WEEKLY TIMER MODES (A/B)
Guide on selecting and confirming Mode A or Mode B for weekly timer configurations.
DEACTIVATING WEEKLY TIMER SETTINGS
Instructions on how to deactivate or cancel the weekly timer settings.
WEEKLY TIMER DATA MANAGEMENT
COPYING TIMER SETTINGS BETWEEN DAYS
Steps for copying timer settings from one day to another for easier schedule creation.
CONFIRMING DATA TRANSFER AND SAVING
Emphasizes the need to press SEND to save copied reservation data.
WEEKLY TIMER DATA DELETION
DELETING SPECIFIC PROGRAM OR DAY RESERVATIONS
Instructions for deleting specific program number reservations or entire day reservations.
WEEKLY TIMER DATA DELETION AND MODE CANCELLATION
DELETING DAY OR MODE RESERVATIONS
How to delete all program reservations for a selected day or all settings for a mode.
DELETION CONFIRMATION AND NOTES
Note on what happens if all reservations are deleted and SEND is not pressed.
INFORMATION AND DIAGNOSTICS
CHECKING AMBIENT TEMPERATURE AND POWER CONSUMPTION
How to display ambient temperature and review monthly power consumption data.
RETRIEVING TIME/DATE AND ERROR HANDLING
How to retrieve time/date and notes on error codes and troubleshooting.
OPERATION MODE LOCKING
LOCKING AND UNLOCKING OPERATIONAL MODES
How to lock and unlock HEATING, COOLING, and DEHUMIDIFYING modes.
MODE LOCK FUNCTION NOTES AND INTERACTIONS
Notes on the function, timer reservations, and multi-connections.
ROUTINE MAINTENANCE PROCEDURES
AIR FILTER CLEANING AND MAINTENANCE
Instructions for cleaning the air filter, including procedure and cautions.
UNIT CLEANING AND LONG-TERM STORAGE
FRONT PANEL CLEANING, REMOVAL, AND SAFETY
Instructions for cleaning the front panel, its removal, and safety warnings.
PREPARING FOR LONG-TERM STORAGE
Procedure for preparing the unit for long periods of non-operation.
PRODUCT CAPABILITIES AND INFORMATION
HEATING, COOLING, AND DEHUMIDIFYING CAPABILITIES
Explains performance and conditions for heating, cooling, and dehumidifying.
REFRIGERANT INFORMATION REFERENCE
Directs users to find refrigerant charge details.
REGULAR INSPECTION AND SERVICE GUIDELINES
SAFETY CHECKS AND PRE-SERVICE INSPECTIONS
Safety checks for earth line, mounting, plug, and pre-service checklist.
NORMAL OPERATIONAL PHENOMENA
Lists noises and behaviors that are normal and not failures.
UNDERSTANDING NORMAL OPERATIONAL SOUNDS AND CONDITIONS
DESCRIPTION OF VARIOUS OPERATIONAL SOUNDS
Describes common noises like perking, mist, steam, odors, and their causes.
OPERATIONAL NOTES AND CLEANING RECOMMENDATIONS
Provides notes on occasional noises and the importance of regular cleaning.
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