Haier HSU-12LTK/012YL(G) User Manual

• J

  Jason HoganAug 9, 2025

  Why is my Haier HSU-12LTK/012YL(G) Air Conditioner not cooling properly?

  

  Same questionReply

  • J

    Jared BradshawAug 10, 2025

    Poor cooling in your Haier Air Conditioner can stem from several factors. First, ensure the air filter is clean. Obstacles blocking the inlet and outlet can also hinder performance, so clear them away. Verify that the temperature is set correctly and that all doors and windows are closed. Direct sunlight can impact cooling efficiency, so use curtains to block it. Finally, consider reducing heat sources or the number of people in the room.

    

    Reply
• S

  Scott KingAug 15, 2025

  What to do if my Haier HSU-12LTK/012YL(G) Air Conditioner does not work at all?

  

  Same questionReply

  • C

    Christopher JordanAug 15, 2025

    If your Haier Air Conditioner isn't working, start by checking if the power plug is properly inserted. Then, check to see if there is a power failure in your location. Finally, inspect the fuse to ensure it hasn't blown out.

    

    Reply
• J

  Jacob MaynardAug 21, 2025

  Why is my Haier Air Conditioner making noise?

  

  Same questionReply

  • S

    Sandra LopezAug 21, 2025

    A swishing or gurgling noise from your Haier Air Conditioner during operation or after stopping is normal, caused by refrigerant flow, especially noticeable in the first few minutes after starting. A cracking noise during operation can be due to the casing expanding or shrinking with temperature changes. However, a big noise from airflow may indicate a dirty air filter, which should be cleaned or inspected.

    

    Reply
• M

  Michael BrayAug 27, 2025

  Why does my Haier Air Conditioner not restart immediately?

  

  Same questionReply

  • D

    David WarrenAug 27, 2025

    When your Haier Air Conditioner is stopped, it won't restart immediately for about 3 minutes. This is a protection mechanism. If you unplug and re-plug the unit, this protection circuit activates for 3 minutes to safeguard the air conditioner.

    

    Reply
• M

  Michael PalmerSep 2, 2025

  Why does my Haier HSU-12LTK/012YL(G) Air Conditioner generate smells?

  

  Same questionReply

  • P

    Patrick JohnsonSep 2, 2025

    If your Haier Air Conditioner is generating smells, it's likely circulating odors from the room, such as those from furniture or cigarettes. You should investigate the source of these smells.

    

    Reply

Haier HSU-12LTK/012YL(G) Specifications

General

Brand	Haier
Model	HSU-12LTK/012YL(G)
Category	Air Conditioner
Language	English

Summary

Cautions

Page: 4

Safety Instructions and Warnings

Read manual carefully before use. Contains important observations for assembly, operation, and maintenance.

Manufacturer Responsibility

Installation by Professionals

Unit must be installed by professional people, not by yourself.

Grounding and Electrical Safety

Ensure proper grounding and unplug unit before opening inlet grill.

Electrical Repairs

All electrical repairs must be carried out by qualified electricians.

Refrigerant Handling

Do not damage tubes carrying refrigerant; avoid piercing or crushing.

Refrigerant Eye Injury Prevention

Prevent refrigerant spurting into eyes to avoid serious eye injuries.

Grille and Louver Safety

Do not obstruct grille or put fingers into inlet/outlet and swing louver.

Children Safety

Do not allow children to play with the unit or sit on the outdoor unit.

Flicker Impression Prevention

Power Connection Requirements

Operation

Page: 7

Remote Controller Buttons and Display

Explains buttons like TURBO/QUIET, FAN, COOL, DRY, SWING, TEMP, SLEEP, LOCK, LIGHT, and their functions.

Timer and Lock Functions

Remote Controller Operation Guide

How to operate the remote controller, including distance and signal reception.

Setting the Clock

Battery Loading and Reset

Auto Run and Fan Operation

How to start the unit and select auto run or fan operation modes.

Fan Speed Selection

How to cycle through fan speeds (LO, MED, HI, AUTO) using the FAN button.

Unit Stop Procedure

Steps to stop the unit, what indicators remain, and flap closure.

Cool, Heat, and Dry Operation Recommendations

Unit Start and Mode Selection

How to start the unit and select operation modes (AUTO, COOL, DRY, HEAT, FAN).

Temperature Setting

How to select the desired temperature using the TEMP buttons.

Fan Speed Selection Details

Detailed explanation of fan speed selection and its behavior in DRY mode.

Hints for Cooling Operation

Air Flow Direction Adjustment (Vertical)

How to adjust the vertical flap's position using the SWING button.

Air Flow Direction Adjustment (Horizontal)

Manual adjustment of horizontal louvers for left/right air flow.

Caution on Vertical Flap Position

Caution on Horizontal Louver Position

Unit Stop Procedure (Detailed)

Details on stopping the unit, display indicators, and flap closure.

Hints for Cooling/Heating Operations

Timer Operation Overview

Introduction to timer operation and setting the clock before use.

Timer Mode Selection

How to select TIMER ON, TIMER OFF, or TIMER ON/OFF modes.

Timer Setting Procedure

Instructions for setting the timer duration using the HOUR buttons.

Confirming Timer Settings

How to confirm time settings and what indicators appear.

Cancelling Timer Mode

Airflow Position Overview

How to select desired operation mode and airflow position.

Airflow Direction Control (Vertical)

Using the SWING button to control the vertical louver's 3-step position.

Airflow Direction Control (Horizontal)

Using the AIRFLOW button to set the vertical louver's position and stop it.

Emergency and Test Operation

Page: 14

Emergency Operation Guide

How to use emergency operation when the remote controller is lost or defective.

Test Operation Guide

How to perform a test operation, especially when room temp is below 16°C.

Removing Operation Restrictions

Installation

Page: 16

Selection of Installation Place

Power Source Requirements

Pipe Selection and Insulation

Installation Diagram

Indoor Unit Installation Steps

Fixing the Indoor Unit Body

Unloading the Indoor Unit Body

Connecting Electric Cables

Cable Connection After Indoor Unit Installation

Cable Connection Before Indoor Unit Installation

Outdoor Unit Installation

Pipe Connection and Torque

Connection Procedure

Purging Method

Additional Refrigerant Charge

Pipe Cutting and Flaring

Power Source Installation Details

Drainage Installation

Drainage Confirmation

Maintenance

Page: 22

Cleaning the Unit Casing

Cleaning the Air Filter

Detailed steps for opening the grill, removing, cleaning, and reattaching the air filter.

Replacing Electrostatic Filter

Better Use of Air Conditioner

Trouble Shooting

Page: 24

System Restart Issues

Common Noises and Causes

Smells and Mist/Steam Issues

Unit Not Working or Poor Cooling

Checks for power, filter dirtiness, obstacles, temperature settings, and sunlight.

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