Yamato Optimum YW09H2/I User Manual (English)

Questions and Answers:

J
James AdamsAug 5, 2025
Why is my Yamato Optimum YW09H2/I not cooling properly?
- R
  Renee WaltonAug 5, 2025
  Poor cooling can occur due to several reasons. Check if the air filter is dirty and clean it, normally it should be cleaned every 15 days. Ensure there are no obstacles blocking the air inlet and outlet. Verify that the temperature is set correctly. Make sure all doors and windows are closed. If there is direct sunlight coming through the window, use a curtain. Also, consider if there are too many heat sources or people in the room.
S
Samuel BeckAug 10, 2025
Why does my Yamato Air Conditioner smell?
- K
  Kelli PalmerAug 10, 2025
  The smells are generated because the system circulates smells from the interior air, such as the smell of furniture, paint, or cigarettes.
M
Marvin CampbellAug 15, 2025
Why won't my Yamato Optimum YW09H2/I Air Conditioner restart immediately?
- H
  Hayley HuangAug 15, 2025
  When the unit is stopped, it won't restart immediately until 3 minutes have elapsed to protect the system. When the electric plug is pulled out and reinserted, the protection circuit will work for 3 minutes to protect the air conditioner.
J
Justin DavisAug 20, 2025
What to do if I hear noise from my Yamato Air Conditioner?
- N
  Nicole FlynnAug 20, 2025
  During unit operation or at stop, a swishing or gurgling noise may be heard. At first 2-3 minutes after unit start, this noise is more noticeable. This noise is generated by refrigerant flowing in the system. During unit operation, a cracking noise may be heard, which is generated by the casing expanding or shrinking because of temperature changes. Should there be a big noise from air flow in unit operation, the air filter may be too dirty.
K
kflynnAug 25, 2025
Why does my Yamato Optimum YW09H2/I blow mist?
- L
  lisa97Aug 26, 2025
  During COOL or DRY operation, the indoor unit may blow out mist. This is due to the sudden cooling of indoor air.
U
uryanAug 29, 2025
Why can't I change the fan speed in dry mode on my Yamato Optimum YW09H2/I Air Conditioner?
- M
  Michael DillonAug 30, 2025
  In DRY mode, when the room temperature becomes lower than the temperature setting plus 2 degrees Celsius, the unit will run intermittently at LOW speed regardless of the FAN setting.

Yamato Optimum YW09H2/I Specifications

General

Brand	Yamato
Model	Optimum YW09H2/I
Category	Air Conditioner
Language	English

Summary

Parts and Functions

Wi-Fi Function Description

Details the system architecture, application environment, and configuration for Wi-Fi connectivity.

System Components Overview

Identifies and illustrates the indoor unit, remote controller, display board, and outdoor unit.

Battery Loading Procedure

Provides step-by-step instructions for loading batteries into the remote controller.

Operation Modes and Controls

Basic Operation

Explains unit startup, mode selection (Cool, Heat, Dry), temperature setting, and fan speed adjustment.

Special Operation Modes

Details Sleep, Turbo/Quiet, and Health operation modes for enhanced comfort and performance.

Timer and Airflow Settings

Covers setting ON/OFF timers and adjusting the healthy airflow function for customized comfort.

Regulatory and Refrigerant Information

Provides details on European conformity, RoHS, WEEE, and important information about the R32 refrigerant.

Indoor Unit Installation

Preparation and Site Selection

Lists necessary tools and guidelines for choosing the optimal installation location for the indoor unit.

Mounting and Piping

Covers fitting the mounting plate, making wall holes, piping directions, and drain hose installation.

Unit Assembly and Wiring

Details securing the indoor unit body, unloading it, and connecting the indoor/outdoor electrical cables.

Electrical Wiring and Connections

Cable Connection Procedures

Explains how to connect cables after and before installing the indoor unit, emphasizing proper terminal connection.

Drainage and System Checks

Details proper drain hose installation and essential checks for installation and test runs.

Maintenance and Cleaning

Smart Use Guidelines

Advises on setting room temperature, closing doors, using the timer, and cleaning the remote controller/indoor body.

Air Purifying Filter Replacement

Provides instructions for cleaning and replacing the air purifying filters, including specific types and care.

Cautions and Safety Warnings

Installation Precautions

Highlights critical warnings regarding installation, power source, voltage, and avoiding improper handling.

Operational Safety Guidelines

Outlines cautions for operating the unit, including airflow direction, electrical safety, and usage restrictions.

Troubleshooting

Normal Performance Checks

Covers common issues like system restart delay, noise generation, smells, and mist/steam output.

Multiple Checkpoints for Issues

Addresses problems like fan speed not changing, poor cooling, and guides through common troubleshooting steps.

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