Haier HSU-18LK2S3 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-18LK2S3

Installation Manual4 pages

Questions and Answers:

M
mcintoshfrankAug 8, 2025
Why is my Haier HSU-18LK2S3 cooling poorly?
- J
  John Smith DDSAug 8, 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.
B
Brenda ColemanAug 13, 2025
Why is my Haier HSU-18LK2S3 Air Conditioner making noise?
- M
  Maria FosterAug 13, 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.
R
Ryan DavisAug 20, 2025
Why won't my Haier HSU-18LK2S3 restart immediately?
- J
  Jessica CalhounAug 20, 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.
J
Jennifer ChapmanAug 26, 2025
Why does my Haier Air Conditioner generate smells?
- J
  Jonathan EdwardsAug 26, 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.
C
Christina FarmerAug 31, 2025
Why can’t I change the fan speed in dry mode on my Haier HSU-18LK2S3?
- J
  john47Sep 1, 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.

Haier HSU-18LK2S3 Specifications

General

Brand	Haier
Model	HSU-18LK2S3
Category	Air Conditioner
Language	English

Summary

Indoor Unit Components

Indoor Unit Parts Description

Details of the indoor unit parts including inlet, outlet, filters, and indicators.

Remote Controller Details

Remote Controller Buttons and Displays

Explanation of remote controller buttons, displays, and their functions.

Outdoor Unit Components

Outdoor Unit Parts Description

Identification of outdoor unit components like outlet, inlet, and drain hose.

Setting the Clock

Clock Setting Procedure

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

Battery Installation

Loading the Batteries

Guide on how to correctly load batteries into the remote controller.

Operation Modes

Unit Start and Stop

Instructions on how to start and stop the air conditioner unit.

Auto Operation Explained

Details on how the auto operation mode selects cooling or heating.

Cool Operation Guide

Information and settings for the cool operation mode.

Dry Operation Guide

Information and settings for the dry operation mode.

Fan Operation Guide

Information and settings for the fan operation mode.

Heat Operation Guide

Information and settings for the heat operation mode.

Air Flow Direction Adjustment

How to adjust the air flow direction using the remote.

Advanced Operation Features

HEALTH Operation Mode

Details on the HEALTH operation mode for air purification.

Timer Operation Guide

Instructions for setting automatic start and stop times.

Emergency and Test Operations

Procedures for emergency operation and test operation modes.

Sleep Mode Operation

Comfortable Sleep Mode

Explanation of how to use the SLEEP mode for comfortable sleeping.

Sleep Mode by Operation Type

How sleep mode functions differ across COOL, DRY, HEAT, and AUTO modes.

Power Failure Resume

Power Failure Resume Function Explained

Details on how the unit resumes operation after a power failure.

Maintenance Guidelines

General Maintenance Tips

Tips on maintaining optimal performance, including cleaning and usage.

Air Filter Replacement

Instructions for cleaning and replacing the air filters.

Safety Cautions and Warnings

Installation Warnings

Important warnings regarding the installation of the air conditioner.

Electrical Safety Precautions

Safety measures related to power supply, cords, and grounding.

Operational Safety Precautions

Safety guidelines for operating the unit and avoiding hazards.

Troubleshooting Common Issues

Normal Performance Checks

Checks for normal operation noise, smells, and mist/steam.

Multiple Checks for Issues

Troubleshooting steps for multiple common problems.

Poor Cooling Diagnosis

Diagnosing and resolving issues related to poor cooling performance.

Operational Cautions and Specifications

Applicable Ambient Temperature Range

Specifies the suitable ambient temperature ranges for operation.

Supply Cord and Fuse Information

Guidelines for supply cord replacement and fuse specifications.

Installation and Usage Guidelines

Recommendations for installation distance, wiring, and battery disposal.

Child Safety and Supervision

Important notes on child safety and supervision during appliance use.

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