Table Of Contents - Haier 2U18MS2VHB Service Manual

Ductless multi-split heat pump, outdoor/indoor, wall mount - highwall, 2'x2' compact cassette, 3'x3' large cassette, slim duct, mid-static ducted, medium static ducted, console

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Installation manual (56 pages)

Service manual (140 pages)

Technical overview (122 pages)

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Table of Contents

Safety & Precautions............................................................................................................................................................. A-2

Specifications ....................................................................................................................................................................... A-3

Outdoor Units ..................................................................................................................................................................... A-3

Highwall Indoor ................................................................................................................................................................... A-4

Ducted Indoor ..................................................................................................................................................................... A-4

Cassette Indoor .................................................................................................................................................................. A-5

Console Indoor .................................................................................................................................................................... A-5

Mid-Static Ducted Indoor ................................................................................................................................................... A-5

Functions and Control ........................................................................................................................................................... A-6

Auto Mode ............................................................................................................................................................................ A-6

Cooling Operation Mode ..................................................................................................................................................... A-6

Dry Mode (Dehumidifying Mode) ........................................................................................................................................ A-6

Heat Mode ............................................................................................................................................................................ A-7

Indoor Fan Control ............................................................................................................................................................... A-7

Cold Air-Proof Operation .................................................................................................................................................... A-7

Timing .................................................................................................................................................................................. A-7

Indoor System Mode Conflict ............................................................................................................................................. A-7

Abnormality Confirmation Approaches ............................................................................................................................. A-8

Low Load Protection Control .............................................................................................................................................. A-8

High Load Protection Control ............................................................................................................................................. A-8

When the Compressor First Starts ..................................................................................................................................... A-8

The Outdoor Fan Control (Exchange Fan) .......................................................................................................................... A-8

The Outdoor Fan Control When In Cooling or Dehumidifying Mode ................................................................................ A-8

The Control of the Outdoor Unit Expansion Valve ............................................................................................................ A-8

Four-Way Valve Control ...................................................................................................................................................... A-8

Antifreezing Protection ....................................................................................................................................................... A-8

Over-Temperature Heat Mode Indoor Coil......................................................................................................................... A-9

INTRODUCTION

A-1