Haier 1U18FS2ERA User Manual

Haier 1U18FS2ERA

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SERVICE MANUAL

Wall mounted Type

outdoor unit

indoor unit and remote controller

2012

Order No.AC1012S001V0

AS18ZS2ERA

FREE MATCH EK

1U18FS2ERA

Table of Contents

Other manuals for Haier 1U18FS2ERA

Installation Manual16 pages

Questions and Answers:

D
Darrell EllisAug 1, 2025
Why is my Haier 1U18FS2ERA not cooling properly?
- J
  johnwhiteAug 1, 2025
  If your Haier Air Conditioner isn't cooling well, several factors could be at play. First, check the air filter; it should be cleaned every 15 days if dirty. Ensure there are no obstructions blocking the air inlet or outlet. Also, verify that the temperature is set correctly and that all doors and windows are closed. Finally, direct sunlight or excessive heat sources in the room can impact cooling performance; use curtains to block sunlight.
T
Tara LewisAug 8, 2025
Why doesn't my Haier Air Conditioner restart immediately?
- R
  Richard CobbAug 8, 2025
  If your Haier Air Conditioner doesn't restart immediately after being stopped, this is normal. To protect the system, there's a 3-minute delay before it can be restarted. If the electric plug is pulled out and reinserted, the protection circuit will also engage for 3 minutes.
N
nathan40Aug 13, 2025
How to change fan speed on Haier 1U18FS2ERA in dry mode?
- B
  Brian SavageAug 13, 2025
  In DRY mode, when the room temperature falls below the set temperature plus 2 degrees Celsius, the Haier Air Conditioner will run intermittently at LOW speed, regardless of the fan setting.
E
Elizabeth EatonAug 19, 2025
What is that noise coming from my Haier 1U18FS2ERA?
- S
  Scott HolmesAug 19, 2025
  If you notice a swishing or gurgling noise during operation or when your Haier Air Conditioner stops, it's likely due to the refrigerant flowing within the system. A cracking noise during operation is typically caused by the casing expanding or shrinking due to temperature fluctuations. However, a big noise from airflow during operation could indicate that the air filter is excessively dirty.
S
stevenspencerAug 26, 2025
Why does my Haier Air Conditioner smell?
- C
  Crystal BoydAug 26, 2025
  This could be due to the system circulating odors from the indoor environment, such as smells from furniture, paint, or cigarettes.

Haier 1U18FS2ERA Specifications

General

Type	Split System
Phase	1
Frequency	60Hz
Refrigerant	R410A
Heating Seasonal Performance Factor (HSPF)	9
Voltage	208/230V
Cooling Capacity	18000 BTU/h

Summary

Introduction

Safety Cautions

Essential safety warnings and precautions for handling the air conditioner and performing repairs.

Specifications

Technical Data

Printed Circuit Board Connector Wiring Diagram

Functions and Control

Indoor Unit Operations

Explains the main functions, control specifications, and operational modes of the indoor unit.

Outdoor Unit Control System

Describes the operation frequency, fan control, and expansion valve control of the outdoor unit.

Installation Procedure

Indoor Unit Installation

Provides step-by-step instructions for installing the indoor unit, including pipe preparation and wiring.

Outdoor Unit Setup

Covers the steps for preparing and installing the outdoor unit, including dimensions.

Piping and Connection Details

Air Tightness Test

Describes the procedure for performing an air tightness test on the refrigerant system.

Vacuuming Procedure

Outlines the steps for vacuuming the refrigerant system to remove moisture and air.

Outdoor Unit Installation

Guides the installation of the outdoor unit, including mounting, piping, and electrical connections.

Electrical Wiring Connections

Details electrical wiring procedures, including wire sizes and breaker requirements.

Safety Precautions

Handling Units with R410A

Specific safety guidelines for handling units using R410A refrigerant.

Read Before Installation

Necessary Tools and Materials

Lists essential tools, materials, and their uses for installation and servicing.

Piping and Flare Procedures

Details requirements and procedures for piping, flare machining, and nut connections.

Outdoor Unit Troubleshooting

Test Run and Diagnosis

Service Diagnosis

Caution for Diagnosis

General advice and warnings before starting the diagnostic process for unit errors.

Problem Symptoms and Measures

Error Codes and Descriptions

Comprehensive table detailing error codes displayed by the unit and their corresponding fault descriptions.

Thermistor or Related Abnormality

Indoor Fan Motor Malfunction

Outdoor DC Fan Motor Fault

IPM Protection and Faults

Over-current of the Compressor

Communication Faults (IPM/Outdoor PCB)

Power Supply Voltage Faults

Overheat Protection (Exhaust Temperature)

Communication Faults (Indoor/Outdoor)

Removal Procedure

Indoor Unit Removal

Outdoor Unit Removal

Wiring Diagrams

Indoor Unit Wiring Diagram

Outdoor Unit Wiring Diagram

Circuit Diagrams

Indoor Unit Circuit Diagram

Outdoor Unit Circuit Diagrams

Unit Model Coding Rules

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