Haier 1U12BS2ERA User Manual (English)

Other manuals for Haier 1U12BS2ERA

Questions and Answers:

J
Jessica DavisAug 8, 2025
Why is my Haier 1U12BS2ERA cooling poorly?
- D
  Danielle BriggsAug 8, 2025
  Poor cooling in your Haier Air Conditioner 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 or outlet. Verify that the temperature is set correctly. Make sure all doors and windows are closed. Reduce direct sunlight by using curtains. Also, consider if there are too many heat sources or people in the room.
J
Jeremy WilliamsAug 15, 2025
Why does my Haier 1U12BS2ERA Air Conditioner make so much noise?
- D
  danielle81Aug 15, 2025
  Your Haier Air Conditioner may produce swishing or gurgling noises during operation or when stopping, especially noticeable in the first 2-3 minutes after starting; this is due to refrigerant flowing in the system. A cracking noise during operation is caused by the casing expanding or shrinking due to temperature changes. However, a big noise from airflow might indicate a dirty air filter.
A
Amy HeathAug 23, 2025
Why Haier 1U12BS2ERA Air Conditioner system does not restart immediately?
- Z
  Zachary RuizAug 23, 2025
  When the Haier Air Conditioner is stopped, it won't restart immediately for 3 minutes to protect the system. Also, if the electric plug is pulled out and reinserted, the protection circuit will activate for 3 minutes.
C
Charles McknightAug 30, 2025
Why can't I change the fan speed in dry mode on my Haier Air Conditioner?
- T
  Todd RodriguezAug 30, 2025
  In DRY mode, when the room temperature is lower than the set temperature plus 2 degrees Celsius, the Haier Air Conditioner will run intermittently at LOW speed regardless of the FAN setting.

Haier 1U12BS2ERA Specifications

General

Cooling Capacity	12000 BTU/h
Energy Efficiency Ratio (EER)	3.21
Refrigerant	R410A
Indoor Unit Noise Level	38 dB(A)
Power Supply	220-240V, 50Hz
Type	Split
Operating Temperature (Cooling)	18°C to 43°C
Operating Temperature (Heating)	-7°C to 24°C

Summary

Introduction

1.1 Model Name Explanation

Explains the meaning of each part of the model number.

1.2 Safety Cautions

Essential safety warnings and precautions for users and technicians.

List of Functions

Specifications

Printed Circuit Board Connector Wiring Diagram

Functions and Control

5.1 Main Functions and Control Specification

Details the main functions and control specifications of the air conditioner system.

5.2 The Control System of Outdoor Unit

Explains the operational frequency and control of the outdoor unit.

5.3 Value of Thermistor

Provides a table of thermistor resistance values at different temperatures.

System Configuration

Parts and Functions

Illustrates and labels the main parts of the indoor unit, outdoor unit, and remote controller.

Operation

Details how to start, stop, and set operating modes and fan speeds.

Comfortable SLEEP

Explains the sleep mode function for temperature adjustment during night.

Maintenance

For Smart Use of The Air Conditioner

Provides tips for efficient and proper use of the air conditioner.

Cautions

Trouble shooting

Normal Performance inspection

Checks to perform when the unit is not operating normally.

Poor cooling

Troubleshooting steps for inadequate cooling performance.

Service Diagnosis

7.1 Caution for Diagnosis

Important precautions to follow before starting the diagnostic process.

7.2 Problem Symptoms and Measures

Lists common symptoms and corresponding measures for troubleshooting.

7.3 Parameter of primary electronic appliance

Details the electrical parameters and specifications of key components.

7.4 Error codes and description

Lists error codes displayed by the unit and their corresponding descriptions.

Installation

Read Before Installation

Key information and warnings to review before proceeding with installation.

Piping Materials/Radial Thickness

Details specifications for copper pipes, including radial thickness.

Air Tightness Test

Procedures for performing an air tightness test using nitrogen.

Vacuuming

Steps for vacuuming the system using a vacuum pump and gauge.

Wiring Procedure

Guidelines for electrical wiring connections and safety precautions.

EUROPEAN REGULATIONS CONFORMITY FOR THE MODELS

IMPORTANT INFORMATION REGARDING THE REFRIGERANT USED

Provides details on refrigerant type, GWP, and charging information.

Removal Procedure

9.1 Removal of Air Filter

Step-by-step guide for removing the air filter from the indoor unit.

9.2 Removal of front panel

Instructions for removing the front panel of the indoor unit.

9.3 Removal of horizontal flap

Procedure for removing the horizontal flap from the indoor unit.

9.4 Removal of Drain pan

Steps for removing the drain pan from the indoor unit.

9.5 Removal of Vertical Blades and Swing Motor

Instructions for removing vertical blades and the swing motor.

9.6 Removal of Electrical Box

Procedure for removing the electrical box from the indoor unit.

9.7 Removal of Heat Exchanger

Steps for removing the heat exchanger from the indoor unit.

9.8 Removal of Fan Rotor and Fan Motor

Instructions for removing the fan rotor and fan motor.

9.9 Removal of Outdoor panel

Procedure for removing the outdoor unit panels.

9.10 Removal of Electrical Box

Steps for removing the electrical box from the outdoor unit.

9.11 Removal of Fan and Fan Motor

Instructions for removing the fan and fan motor from the outdoor unit.

9.12 Removal of Fan Motor Bracket and Partition

Procedure for removing the fan motor bracket and partition.

9.13 Removal of Compressor and Heat Exchanger

Steps for removing the compressor and heat exchanger.

Wiring diagrams

Indoor unit

Provides the wiring diagram for the indoor unit.

Outdoor unit

Presents the wiring diagram for the outdoor unit.

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