Haier HSU-18LEK03-Y3 User Manual

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Please read this operation manual before using the air conditioner.

Keep this operation manual for future reference.

SPLIT TYPE ROOM AIR CONDITIONER

OPERATION MANUAL

0010518786

Contents

1

2-4

5

7

6.7

CAUTIONS

PARTS AND FUNCTIONS

OPERATION

MAINTENANCE

TROUBLE SHOOTING

HSU-09HEK03

HSU-09LEK03

HSU-12HEK03

HSU-12LEK03

HSU-09LEK13

HSU-12LEK13

HSU-07LEK03

HSU-07HEK03

HSU-18LEK13

HSU-24LEK13

HSU-12LEK13-M

HSU-18HEK03

HSU-24HEK03

HSU-18LK2S3

HSU-12LEK03-Y3

HSU-24LK2S3

HSU-18LEK03-Y3

HSU-24LEK03-Y2

HSU-09CK2S3

HSU-09LEK03-Y3

HSU-12CK2S3

HSU-09CK2W3

HSU-09CK6B3

HSU-12CK2W3

HSU-12CK6B3

HSU-18LK2W3

HSU-18LK6B3

SAS-09HEK3

SAS-12HEK3

SAS-18HEK3

SAS-24HEK3

HSU-12LEK03-Y5

HSU-09LEK03-Y5

HSU-12LH03

HSU-09LH03

HSU-18LEK03-Y5

HSU-18LH03

HSU-24LEK03-Y5

HSU-24LH03

HSU-12HH03

HSU-09HH03

HSU-18HH03

HSU-24HH03

HSU-12HEG03

HSU-09HEG03

HSU-18HEG03

HSU-24HEG03

HSU-12LEK03-Y6

HSU-18LEK03-Y6

HSU-12LEK03-Y2

HSU-24LEK03-Y3

HSU-09LEK03-Y2

HSU-18LEK03-Y2

YKS-18HEK03

YKS-24HEK03

HSU-18LEK03

HSU-24LEK03-Y6

HSU-12LEK03-Y4

HSU-18LEK03-Y4

HSU-24LEK03-Y4

HSU-09LEK03-Y4

HSU-09LEK03-Y6

HSU-18LK2W3

HSU-18LK6B2

HSU-24LK2S2

HSU-12CK6B2

HSU-24LEK03

HSU-18LEK03EK1

HSU-26HEK03

Table of Contents

Other manuals for Haier HSU-18LEK03-Y3

Installation Manual4 pages

Questions and Answers:

J
Jo LiAug 14, 2025
Why is my Haier HSU-18LEK03-Y3 cooling poorly?
- M
  maryclarkAug 15, 2025
  Poor cooling in your Haier Air Conditioner can stem from several factors. First, check if the air filter is dirty and clean it, ideally every 15 days. Ensure there are no obstructions blocking the air inlet or outlet. Verify that the temperature is set correctly and that all doors and windows are closed tightly. Direct sunlight can also impact cooling efficiency, so use curtains to block it. Finally, consider if there are excessive heat sources or too many people in the room.
N
Nancy MillerAug 17, 2025
Why is my Haier HSU-18LEK03-Y3 Air Conditioner not cooling well?
- W
  waltersbrandonAug 18, 2025
  There are several reasons why your Haier Air Conditioner might not be cooling effectively. 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. Use curtains to block direct sunlight. Reduce heat sources or the number of people in the room.
R
Robert CoxAug 21, 2025
How to fix Haier HSU-18LEK03-Y3 Air Conditioner not restarting immediately?
- S
  Sophia AllenAug 21, 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.
B
benjaminorozcoAug 25, 2025
Why is my Haier Air Conditioner making noise?
- J
  Javier WilsonAug 26, 2025
  The swishing or gurgling noise you hear in your Haier Air Conditioner is typically refrigerant flowing through the system. You might notice it more within the first few minutes after starting the unit. Also, cracking noises can occur as the unit's casing expands or shrinks due to temperature fluctuations. If you notice a big noise from air flow, the air filter may be too dirty.
M
Maria Wade PhDAug 27, 2025
Why won't my Haier Air Conditioner restart immediately?
- A
  Angela KennedyAug 27, 2025
  If your Haier Air Conditioner doesn't restart immediately after being stopped, it's due to a built-in protection mechanism. The system requires a 3-minute delay before restarting to safeguard the unit. If you unplug and re-plug the air conditioner, this protection circuit activates, preventing immediate restart for about 3 minutes.
L
Leslie KingAug 31, 2025
Why does my Haier HSU-18LEK03-Y3 Air Conditioner generate smells?
- J
  John WilsonAug 31, 2025
  Smells from your Haier Air Conditioner can occur when the system circulates odors from the room, such as those from furniture, paint, or cigarettes.
K
Kayla WadeSep 3, 2025
Why can’t I change the fan speed in dry mode on my Haier Air Conditioner?
- F
  Frederick BrownSep 3, 2025
  In DRY mode, the fan speed of your Haier Air Conditioner cannot be changed because when the room temperature drops below the set temperature plus 2 degrees Celsius, the unit will run intermittently at low speed, regardless of the fan setting.
J
Jonathan JohnsonSep 6, 2025
Why does my Haier HSU-18LEK03-Y3 make noise?
- E
  Elizabeth AllenSep 6, 2025
  During operation, a swishing or gurgling noise may be heard, especially in the first 2-3 minutes after starting, due to refrigerant flowing in the system. A cracking noise may occur because the casing expands or shrinks due to temperature changes. If there's a big noise from air flow, the air filter may be too dirty.
C
Colleen JohnsonSep 10, 2025
Why can't I change the fan speed in dry mode on my Haier Air Conditioner?
- A
  Amy WeberSep 10, 2025
  In DRY mode, when the room temperature becomes lower than the set temperature plus 2 degrees Celsius, the unit will run intermittently at LOW speed regardless of the FAN setting.

Haier HSU-18LEK03-Y3 Specifications

General

Brand	Haier
Model	HSU-18LEK03-Y3
Category	Air Conditioner
Language	English

Summary

Parts and Functions Overview

Indoor Unit Components

Identifies and explains the parts of the indoor air conditioning unit.

Remote Controller Functions

Details the various buttons and displays on the air conditioner's remote control.

Outdoor Unit Identification

Shows the main parts of the outdoor unit of the air conditioner.

Setting the Clock

Step-by-step instructions for setting the clock on the remote controller.

Remote Battery Installation

Guide on how to properly insert batteries into the remote controller.

Air Conditioner Operation Modes

Starting and Stopping the Unit

Instructions on how to turn the air conditioner on and off.

Automatic Operation Mode

Explains how the unit automatically selects cooling or heating based on temperature.

Cooling Mode Operation

Details on how to operate the air conditioner in cooling mode.

Dehumidifying (Dry) Mode

Information on using the unit's dehumidification function.

Fan Only Mode Operation

How to use the unit when only the fan function is needed.

Heating Mode Operation

Details on how to operate the air conditioner in heating mode.

Adjusting Airflow Direction

Guide to controlling the horizontal and vertical airflow direction.

Health Function and Anion Generator

Explains the health function and the benefits of the anion generator.

Setting Timer Operations

Instructions for setting automatic start/stop timers for the unit.

Emergency and Test Operations

Procedures for operating the unit in emergency or test modes.

Sleep Mode Operation

How to use the sleep mode for optimized comfort and temperature.

Power Failure Resume

Details how the unit restarts after a power interruption.

Maintenance and Care Guide

Maintaining Optimal Room Temperature

Tips for setting and maintaining the ideal room temperature.

Keeping Airflow Unobstructed

Importance of not blocking the air inlet and outlet for efficient operation.

Remote Controller Maintenance

Instructions on how to clean and care for the remote controller.

Cleaning the Indoor Unit

Guide on how to properly clean the indoor unit body.

Tips for Efficient Operation

Advice on closing doors/windows and using timers effectively.

Preparing for Long-Term Storage

Instructions for turning off the unit when not in use for extended periods.

Effective Louver Adjustment

How to use the louvers for optimal air distribution.

Cleaning Agents to Avoid

Lists substances that should not be used for cleaning the unit.

Cleaning the Air Filter

Detailed steps for cleaning the unit's air filters.

Replacing Air Purifying Filters

Instructions for installing new air purifying filters.

Attaching Standard Air Filter

Guide on how to correctly attach the standard air filter.

Cautions and Safety Precautions

Installation Safety Warnings

Crucial safety warnings regarding the installation process.

Responding to Unit Abnormalities

Immediate actions to take when the unit shows signs of malfunction.

Electrical Power and Wiring Safety

Guidelines for safe power supply connection and wiring.

Prohibited Electrical Practices

Actions to avoid concerning power cords and connections.

Usage Environment Precautions

Cautions related to the operating environment and unit placement.

Warning: Operating with Wet Hands

Caution against operating the unit or switches with wet hands.

Prohibited Object Placement

Items that should not be placed on or near the air conditioner.

Troubleshooting Guide

Troubleshooting Normal Phenomena

Checks for common sounds or smells during normal operation.

Troubleshooting Poor Cooling

Addresses common problems affecting the unit's cooling efficiency.

General Troubleshooting Checklist

A list of common checks for various operational problems.

Ambient Temperature Operating Limits

Specifies the applicable temperature ranges for operation.

Supply Cord and Fuse Troubleshooting

Guidance on issues related to the supply cord and fuses.

Installation and Support Guidelines

Various guidelines for proper installation and unit support.

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