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Haier 2U18MS2VHB Service Manual page 79

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 ......................................................................................................................................................................... G-2
Component Overview .........................................................................................................................................................G-2
Indoor Unit Circuit Board .....................................................................................................................................................G-4
Fresh Air Function ................................................................................................................................................................G-5
Ductwork/Grilles .................................................................................................................................................................. G-6
Testing .................................................................................................................................................................................. G-7
Test Condensate Pump and Associated Float Switch .......................................................................................................G-7
Testing Temperature Sensors .............................................................................................................................................G-7
Testing Communication Circuit ..........................................................................................................................................G-8
Indoor Fan Motor Voltage Check ........................................................................................................................................G-8
Static Pressure Charts .........................................................................................................................................................G-9
Board Replacement ...........................................................................................................................................................G-10
Removing the Condensate Pump .....................................................................................................................................G-10
Removing Fan Motor .........................................................................................................................................................G-10
Replacing WiFi Module .......................................................................................................................................................G-11
Wiring Diagram ................................................................................................................................................................... G-12
DIP Switch Settings ............................................................................................................................................................ G-13
Error Codes ......................................................................................................................................................................... G-14
MID-STATIC DUCTED TECHNICAL OVERVIEW
Table of Contents
MID-STATIC DUCTED TECHNICAL OVERVIEW
USYM09UCDSA
USYM12UCDSA
USYM18UCDSA
USYM24UCDSA
G-1

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