Haier USYM18UCDSA User Manual

Ductless Multi-Split Heat Pump
Service Manual
Design may vary by model number.
• Please read this manual before using the heat pump.
• Keep this user manual for future reference.
Table of Contents
Introduction ............................................................................................................... A-1
Outdoor Technical Overview ...................................................................................... B-1
Wall Mount Technical Overview ..................................................................................C-1
Compact Cassette Technical Overview ......................................................................D-1
Large Cassette Technical Overview ............................................................................ E-1
Slim Duct Technical Overview .................................................................................... F-1
Mid-Static Ducted Technical Overview .......................................................................G-1
Medium Static Ducted (Pro Series) Technical Overview ..............................................H-1
Console Technical Overview ........................................................................................ I-1
Troubleshooting & Reference ..................................................................................... J-1
Outdoor
2U18MS2VHB
3U24MS2VHB
4U36MS2VHB
Indoor
Wall Mount - Highwall
AW07LC2VHB
AW09LC2VHB
AW12LC2VHB
AW18LC2VHB
AW24LP2VHA
2’x2’ Compact Cassette
AB09SC2VHA
AB12SC2VHA
AB18SC2VHA
3’x3’ Large Cassette
AL24LP2VHA
Slim Duct
AD07SL2VHB
AD09SL2VHB
AD12SL2VHB
AD18SL2VHB
Mid-Static Ducted
USYM09UCDSA
USYM12UCDSA
USYM18UCDSA
USYM24UCDSA
Medium Static Ducted
AM24LP2VHA
Console
USYF09UCDWA
USYF12UCDWA
USYF18UCDWA
• Before troubleshooting or servicing equipment, review equipment installation guides
and conrm ALL installation requirements & specications have been met. Including,
but not limited to: wiring, clearance, ducting (where applicable), power, and line set
requirements. Correct any installation issues before continuing.

Haier USYM18UCDSA Specifications

General

Brand	Haier
Model	USYM18UCDSA
Category	Heat Pump
Language	English

Summary

Introduction

Safety & Precautions

Essential safety guidelines and warnings for installation and operation.

Specifications

Technical data and ratings for various outdoor and indoor unit types.

Functions and Control

Details system operating modes, controls, and protection features.

Outdoor Technical Overview

Components

Detailed description of outdoor unit components like PCB, motors, and sensors.

Operations

Sequences of operation for cooling and heating modes.

Testing

Procedures for testing outdoor unit components like fan motors and valves.

Wall Mount Technical Overview

Components

Overview of indoor wall mount unit parts and their functions.

Testing

Procedures for testing wall mount indoor unit components.

Compact Cassette Technical Overview

Components

Overview of compact cassette indoor unit parts.

Testing

Procedures for testing compact cassette indoor unit components.

Large Cassette Technical Overview

Components

Overview of large cassette indoor unit parts.

Testing

Procedures for testing large cassette indoor unit components.

Slim Duct Technical Overview

Components

Overview of slim duct indoor unit parts.

Ductwork/Grilles

Information on duct configurations and installation for slim duct units.

Testing

Procedures for testing slim duct indoor unit components.

Mid-Static Ducted Technical Overview

Components

Overview of mid-static ducted indoor unit parts.

Ductwork/Grilles

Information on duct configurations and installation for ducted units.

Testing

Procedures for testing mid-static ducted indoor unit components.

Console Technical Overview

Components

Overview of console indoor unit parts.

Testing

Procedures for testing console indoor unit components.

Troubleshooting & References

Special Functions

Details on special functions like Auto Restart and Temperature Compensation.

Master Error Code Chart

Comprehensive list of error codes and their corresponding indicators.

Outdoor Unit Error Codes

Specific error codes related to outdoor unit malfunctions.

Flow Charts

Diagnostic flowcharts for troubleshooting common errors.