Table of Contents
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SPLIT TYPE AIR CONDITIONER
INDOOR UNIT/OUTDOOR UNIT
OUTDOOR UNIT
RAC-25YHA
RAC-35YHA
Instruction manual
To obtain the best performance and ensure years of
trouble free use, please read this instruction manual
completely.
MODEL
RAS-25YHA / RAC-25YHA
RAS-35YHA / RAC-35YHA
INDOOR UNIT
RAS-25YHA
RAS-35YHA
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Table of Contents
Related Manuals for Hitachi RAS-35YHA
Summarization of Contents
SAFETY PRECAUTIONS
PRECAUTIONS DURING INSTALLATION
Essential safety guidelines for the proper installation of the air conditioner unit.
PRECAUTIONS DURING SHIFTING OR MAINTENANCE
Safety measures to follow when moving or servicing the unit to prevent accidents.
NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT COMPONENTS
Identification and description of the parts and functions of the indoor unit.
OUTDOOR UNIT COMPONENTS
Identification and description of the parts and functions of the outdoor unit.
MODEL AND DIMENSIONS OVERVIEW
Specifications detailing model names and their physical dimensions.
INDOOR UNIT DETAILS
INDICATORS AND TEMPORARY SWITCH
Explanation of indicator lamps and the function of the temporary operation switch.
AIR FILTERS AND NEGATIVE ION STICK
Instructions for attaching air cleansing filters and the negative ion stick.
REMOTE CONTROLLER OPERATION
REMOTE CONTROLLER FUNCTIONS AND DISPLAY
Detailed explanation of remote controller buttons, signals, and display indicators.
REMOTE CONTROLLER USAGE PRECAUTIONS
Important warnings and guidelines for the safe and effective use of the remote controller.
AIR CONDITIONER FUNCTIONS
AUTO RESTART CONTROL FUNCTION
Information on the unit's ability to restart automatically after a power outage.
AUTOMATIC OPERATION MODE
Guidance on using the automatic mode for temperature control based on room conditions.
HEATING OPERATION
HEATING OPERATION CONDITIONS AND GUIDELINES
Conditions for effective heating and operational advice, including temperature limits.
DEFROSTING OPERATION EXPLANATION
Details on the automatic defrosting cycle that occurs during heating operations.
DEHUMIDIFYING OPERATION
DEHUMIDIFYING FUNCTION EXPLANATION
Explanation of the dehumidifying mode, its target temperature, and operational behavior.
COOLING OPERATION
COOLING OPERATION SETUP PROCEDURE
Steps for setting up cooling operation using the remote controller, including fan and temperature.
FAN OPERATION
FAN MODE USAGE
Instructions for operating the unit solely as an air circulator.
AUTO FAN SPEED IN OPERATING MODES
Explanation of how the automatic fan speed functions in cooling and heating modes.
HOW TO SET THE TIMER
SETTING TIME AND DATE FOR TIMERS
Procedure to set the current time, day, and month for timer operations.
SETTING THE OFF-TIMER
Instructions for programming the unit to turn off automatically at a specific time.
SETTING THE ON-TIMER
Instructions for programming the unit to turn on automatically at a specific time.
SETTING THE ON/OFF-TIMER
How to program the unit for both automatic turn-on and turn-off times.
CANCELING TIMER RESERVATIONS
Steps to cancel any previously programmed timer settings.
HOW TO SET THE SLEEP TIMER
SLEEP TIMER OPERATION GUIDE
Guide to setting the sleep timer for automatic shutdown after a specified duration.
CANCELING SLEEP TIMER RESERVATION
Procedure to cancel an active sleep timer setting.
ADJUSTING THE AIR DEFLECTORS
VERTICAL AIRFLOW DIRECTION ADJUSTMENT
How to adjust the horizontal deflector to control upward and downward airflow.
HORIZONTAL AIRFLOW DIRECTION ADJUSTMENT
How to adjust the vertical deflector to control left and right airflow.
REMOTE CONTROLLER BATTERY REPLACEMENT
Step-by-step instructions for replacing batteries in the remote control unit.
MAINTENANCE PROCEDURES
AIR FILTER CLEANING
Detailed procedure for cleaning the air filter to maintain unit efficiency and performance.
MAINTENANCE PROCEDURES
FRONT PANEL CLEANING AND REMOVAL
Instructions for cleaning the indoor unit's front panel and its method of removal.
MAINTENANCE FOR LONG-TERM STORAGE
Steps for performing maintenance when the unit is not in use for extended periods.
UNIT INFORMATION AND CAPABILITIES
OPERATIONAL CAPABILITIES OVERVIEW
Summary of the unit's heating, cooling, and dehumidifying capabilities.
VARIOUS FUNCTIONS EXPLANATION
Details on specific functions and their operational characteristics.
TIMER AND SLEEP TIMER OPERATION NOTES
Important clarifications on timer and sleep timer programming and priority.
REGULAR INSPECTION AND SERVICE
PERIODIC INSPECTION POINTS
Essential checks to perform semi-annually or annually for unit health.
PRE-SERVICE TROUBLESHOOTING CHECKS
Common issues and checks to perform before contacting customer service.
NORMAL OPERATIONAL SOUNDS AND OCCURRENCES
Explanation of normal sounds and phenomena that do not indicate a unit malfunction.
REGULAR INSPECTION AND SERVICE
CRITICAL ISSUES REQUIRING IMMEDIATE SERVICE
Identification of critical faults that require prompt attention from a sales agent.
ADDITIONAL NOTES AND CONTACT INFORMATION
Further operational notes, causes of odors, and essential contact details for service.
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