Hitachi RAS-80YHA - User Manual

This document describes the Hitachi Split Type Indoor Unit/Outdoor Unit, model RAS-80YHA/RAC-80YHA, an air conditioning system designed for optimal performance and user convenience.

Function Description

The Hitachi Split Type air conditioner provides cooling, heating, dehumidifying, and fan-only operations. It features an indoor unit and an outdoor unit, controlled by a remote controller. The system is designed to maintain a comfortable room temperature and air quality.

Indoor Unit/Outdoor Unit Overview:

The indoor unit, with dimensions of 1150mm (width) x 333mm (height) x 245mm (depth), is responsible for air intake and outlet within the room. It houses an air filter to prevent dust, a front panel for air intake, and indicators for operating conditions. Horizontal and vertical deflectors manage air direction. The outdoor unit, measuring 925mm (width) x 875mm (height) x 315mm (depth), handles the air inlet (back, left side) and blows out warm air.

Operation Indicators:

The indoor unit features several indicators:

TIMER LAMP: Lights when the timer is active.
OPERATION LAMP: Lights during operation. It flashes during preheating (2-3 minutes after startup) and defrosting (5-10 minutes, approximately once an hour when frost forms on the outdoor unit's heat exchanger).
FILTER LAMP: Lights after approximately 200 hours of operation to indicate that the air filter needs cleaning. It turns off when the "AUTO SWING" button is pressed in "STANDBY MODE."

Temporary Switch:

A temporary switch allows basic operation (start/stop) if the remote controller is unavailable. Pressing it once starts the unit in the previously set operation mode. If the power is turned off and then on again, using the temporary switch will initiate automatic mode.

Remote Controller:

The remote controller operates the indoor unit from up to 7 meters away. It features a display showing selected room temperature, current time, timer status, function, and circulation intensity. Key buttons include:

Signal emitting window/transmission sign: Blinks when a signal is sent.
START/STOP button: Starts and stops operation.
FAN SPEED selector: Adjusts fan speed (AUTO, LOW, MED, HI) in FAN mode.
AUTO SWING button: Controls the horizontal air deflector angle.
TEMPERATURE buttons: Adjusts temperature settings up or down.
SLEEP button: Sets the sleep timer.
TIME button: Sets and checks time and date.
RESET buttons: Resets settings.
FUNCTION selector: Cycles through operating modes (AUTO, HEAT, DEHUMIDIFY, COOL, FAN).
PARALLEL SWING button: Controls vertical air deflectors to parallel.
SYMMETRY SWING button: Controls vertical air deflectors to symmetry.
TIMER control: Sets ON-TIMER, OFF-TIMER, and ON/OFF-TIMER.
RESERVE button: Confirms timer settings.
CANCEL button: Cancels timer reservations.

Important Technical Specifications

Model: RAS-80YHA/RAC-80YHA
Indoor Unit Dimensions (WxHxD): 1150mm x 333mm x 245mm
Outdoor Unit Dimensions (WxHxD): 925mm x 875mm x 315mm
Operating Temperature Ranges:
- Cooling: Outdoor 21-43°C, Indoor Dry bulb 21-32°C, Wet bulb 15-23°C
- Heating: Outdoor 1-21°C, Indoor Dry bulb 20-27°C, Wet bulb 2-19°C
UV LED: Emits ultra violet light. Avoid direct eye exposure.
Auto Restart Control: Restarts with previous settings after power failure. Not available with Timer or Sleep Timer.
Power Consumption (OFF mode): Approximately 8W when power from mains remains ON.

Usage Features

Automatic Operation:

The unit automatically selects HEAT, COOL, or DEHUMIDIFY based on room temperature.

Over 27°C: COOL mode, 27°C preset, HI fan speed at start, then MED/LOW.
23-27°C: DEHUMIDIFY mode, slightly lower than room temperature, LOW fan speed.
Under 23°C: HEAT mode, 23°C preset, HI fan speed at start, then MED/LOW. Users can manually adjust the mode if the automatic selection is not satisfactory.

Heating Operation:

Recommended for outdoor temperatures under 21°C.

Select (HEAT) mode.
Set FAN SPEED (AUTO, HI, MED, LOW). AUTO adjusts fan speed based on temperature. HI provides quick warming but may feel chilly initially.
Set desired room temperature (recommended 18-22°C).
Press START/STOP.

Dehumidifying Operation:

Recommended for room temperatures over 16°C.

Select (DEHUMIDIFY) mode. Fan speed is automatically set to LOW.
Set desired room temperature (recommended 20-26°C).
Press START/STOP. The unit dehumidifies to the preset level. If room temperature is lower than the setting, it dehumidifies at a slightly lower temperature and stops when the room temperature falls below the setting.

Cooling Operation:

Recommended for outdoor temperatures 21-43°C.

Select *(COOL) mode.
Set FAN SPEED (AUTO, HI, MED, LOW). AUTO adjusts fan speed based on temperature.
Set desired room temperature (recommended 25-28°C).
Press START/STOP. Cooling starts only if the temperature setting is below the current room temperature.

Fan Operation:

Used as an air circulator or to dry the indoor unit.

Select + (FAN) mode.
Set FAN SPEED.
Press START/STOP. In AUTO fan speed mode during cooling/heating, fan speed adjusts based on the difference between room and set temperatures.

Timer Settings (OFF-Timer, ON-Timer, ON/OFF-Timer):

Set current time, day, and month using the TIME button.
Select desired timer type (OFF-TIMER, ON-TIMER, or ON/OFF-TIMER).
Set the turn-off/turn-on time using the TIMER control button.
Press RESERVE to confirm. To cancel, press the CANCEL button. Only one timer can be set at a time.

Sleep Timer:

Controls fan speed and room temperature automatically for comfort and health.

Ensure current time is set.
Press the SLEEP button.
Select sleep duration (1-7 hours).
The display shows the turn-off time. The sleep timer overrides other timers if set afterwards. It is effective only once per setting.

Adjusting Air Deflector:

Horizontal Air Deflector: Use the "AUTO SWING" button to swing the deflector up and down continuously or set it to a desired angle.
Vertical Air Deflectors: Use the "PARALLEL SWING" button to swing deflectors left and right to parallel, or the "SYMMETRY SWING" button to swing them left and right to symmetry. Avoid prolonged swinging in cooling mode to prevent condensation.

Remote Controller Battery Exchange:

Remove the back cover.
Replace old batteries with new ones, ensuring correct polarity. Do not mix old and new batteries or different types. Remove batteries if not using the remote for 2-3 months.

Ideal Ways of Operation:

Maintain suitable room temperature (avoid freezing temperatures).
Use curtains or blinds to reduce heat entry/loss.
Ventilate the room occasionally.
Utilize the timer functions for energy efficiency and comfort.
Adjust temperature and airflow for babies, children, and the elderly.

Maintenance Features

General Maintenance:

Cleaning and maintenance should only be performed by qualified service personnel. Always stop operation and switch off the power supply before maintenance.

Air Filter Cleaning:

Clean the air filter every 2 weeks or sooner if dusty.

Open the front panel.
Gently lift and remove the air cleansing and deodorizing filter from the air filter frame.
Vacuum dust from both filters. If very dusty, rinse with running tap water and gently brush with a soft bristle brush.
Allow filters to dry in shade.
Re-insert the air cleansing and deodorizing filter into the frame, ensuring "FRONT" faces forward.
Attach the filters and close the front panel.

Do not wash with hot water (>40°C) or expose to direct sun.
Do not use detergent on the air cleansing and deodorizing filter.
Air cleansing & deodorizing filters are not washable and should be replaced annually (Type number: SPX-CFH13).
Do not operate the air conditioner without filters.

Washable Front Panel Cleaning:

Remove the front panel by pushing the right arm inward and pulling it out.
Wash with clean water and a soft sponge. Use neutral detergent if needed, then rinse thoroughly.
Wipe dry with a soft cloth.
Re-attach the front panel by inserting the projections into the flanges and securing them into the holes.

Do not splash water directly on the unit body.
Do not use hot water (>40°C), benzine, gasoline, acid, thinner, or a brush, as these can damage plastic surfaces and coating.

Minus Ion Stick Attachment:

Attach the minus ion stick to the lower hooks of the filter frame, pushing up the upper hooks on the left side of the front cover.

Maintenance at Beginning of Long Off Period:

Run the unit in (COOL) mode at 32°C with HI fan speed for about half a day on a fine day to dry the unit. Then, switch off the power plug.

Regular Inspection:

Qualified service personnel should check the following points every half-yearly or yearly:

Earth line connection.
Mounting frame condition (rust, stability).
Power line plug connection (firmness).

Troubleshooting (Before Calling Service):

Unit does not operate: Check fuse, voltage, and circuit breaker.
Unit does not cool/heat well: Check if air filter is clean, outdoor unit is obstructed, doors/windows are open, heat sources are present, or set temperature is suitable.
Notes on normal phenomena: Slight flowing noise of refrigerant, slight rubbing noise from fan casing, and odors from smoke/foodstuffs/cosmetics are normal. Clean air filter and evaporator regularly to reduce odors.

If issues persist, contact your sales agent with model, production number, installation date, and fault description. Ensure power supply is connected at the rated voltage to prevent damage or reduced capacity.