Haier USYM12UCDSA 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 USYM12UCDSA Specifications

General

Brand	Haier
Model	USYM12UCDSA
Category	Heat Pump
Language	English

Summary

Introduction

Safety & Precautions

Functions and Control

Explains the operational modes, control features, and system logic of the heat pump.

Abnormality Confirmation Approaches

Outdoor Technical Overview

Operations

Details the operational sequences for cooling and heating modes, including sensor functions.

Error Codes

Lists and explains error codes displayed by the outdoor unit for fault diagnosis.

Wall Mount Technical Overview

Compact Cassette Technical Overview

Large Cassette Technical Overview

Slim Duct Technical Overview

Mid-Static Ducted Technical Overview

Medium Static Ducted (Pro Series) Technical Overview

Console Technical Overview

Components

Testing

Testing procedures for console indoor unit components.

Error Codes

Troubleshooting & References

Master Error Code Chart

Comprehensive chart correlating error codes across different unit types and displays.

Outdoor Unit Error Codes

Specific error codes related to outdoor unit sensors and components.

Flow Charts