Haier 2U18MS2VHB Service Manual page 103

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)

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Contents
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Table of Contents

Components ...........................................................................................................................................................................I-2

Component Overview ...........................................................................................................................................................I-2

Indoor Circuit Board...............................................................................................................................................................I-3

Testing ....................................................................................................................................................................................I-4

Removing the Filter Cover & Filter ........................................................................................................................................I-4

Front Cover Removal .............................................................................................................................................................I-4

Control Box Removal .............................................................................................................................................................I-4

Board Replacement ...............................................................................................................................................................I-4

Upper Louver Removal ..........................................................................................................................................................I-5

Lower Damper Assembly Removal .......................................................................................................................................I-5

Replace Fan Motor .................................................................................................................................................................I-5

Indoor Fan Motor Test Procedure .........................................................................................................................................I-6

Testing Temperature Sensors ...............................................................................................................................................I-7

Testing Louver Motors ..........................................................................................................................................................I-7

Testing Communication Circuit ............................................................................................................................................I-8

Replacing WiFi Module ...........................................................................................................................................................I-8

Wiring Diagram/DIP Switch Settings ......................................................................................................................................I-9

Error Codes ...........................................................................................................................................................................I-10

CONSOLE TECHNICAL OVERVIEW

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CONSOLE TECHNICAL OVERVIEW

USYF09UCDWA

USYF12UCDWA

USYF18UCDWA

I-1

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