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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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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
Table of Contents
CONSOLE TECHNICAL OVERVIEW
USYF09UCDWA
USYF12UCDWA
USYF18UCDWA
I-1

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