Willis WMI12MH16S - User Manual

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Service Manual

Main Page

Table of Contents2
Panels View4
Product View5
Specifications6
Operation Characteristic Curve11
Capacity Variation Ratio According to Temperature12
Cooling and Heatng Data Sheet in Rated Frequency13
Noise Curve14
Outline Dimension Diagram15
Refrigerant System Diagram18
Indoor Unit18
Outdoor Unit18
Electrical Part19
Wiring Diagram19
PCB Printed Diagram25
Function and Control31
Buttons on Remote Controller31
Icons on Display Screen31
Mode Button31
+ or - Button32
Fan Button32
Clock Button32
Timer-On/Timer-Off Button32
Function Introduction for Combination Buttons33
X-Fan Button33
Temp Button33
Light Button33
Operation Guide34
Replacement of Batteries in Remote Controller34
Brief Description of Modes and Functions35
Cooling Mode35
Dehumidifying Mode35
Condition and Process of Defrost36
Fan Mode36
Auto Mode36
Other Controls37
Indoor Fan Control38
Buzzer Control38
Up-And-Down Swinging Control38
Display38
Drying Function39
Memory Function When Interrupting the Power Supply39
Indoor Part40
Up and down Wind Blow Functions41
General Timing41
Moment Timing41
Timing Change41
Fault Detection of Thermo-Bulb42
Forced Running Function of the Indoor Units42
Power-Failure Memory Function42
Locked Protection of Indoor Fan42
Outdoor Part43
Input Parameter Compensation and Calibration43
Basic Functions43
Defrosting Control43
Control Logic44
Heating Mode44
Compressor Control44
Outer Fans Control44
Overload Protection Function45
Protective Function for Discharge Temperature of Compressor45
Voltage Sag Protection46
Communication Fault46
Module Protection46
Module Overheating Protection46
Compressor Overloads Protection47
Starting-Up Failure Protection for Compressor47
Out-Of-Step Protection for Compressor47
Voltage Abnormity Protection for DC Bus47
PFC Protection48
Failure Detection for Sensor48
Installation and Maintenance49
Safety Precautions for Installation49
Main Tools for Installation and Maintenance50
Installation Dimension Diagram51
Installation Procedure52
Installation Parts-Checking53
Selection of Installation Location53
Electric Connection Requirement53
Installation of Indoor Unit53
Install Wall-Mounting Frame54
Outlet Pipe54
Connect the Pipe of Indoor Unit54
Install Drain Hose54
Connect Wire of Indoor Unit55
Bind up Pipe55
Hang the Indoor Unit55
Outdoor Unit Connection55
Installation of Outdoor Unit56
Fix Outdoor Unit56
Connect Outdoor Electric Wire56
Neeten the Pipes56
Vacuum Pumping and Leak Detection57
Check after Installation and Test Operation57
Maintenance58
Malfunction Analysis58
Poor Cool (Heat) Operation59
Flashing LED of Indoor/Outdoor Unit and Primary Judgement62
Analysis of Processing of some of the Malfunction Display69
Discharging Method74
How to Check Simply the Main Part75
Capacitor Charge Fault75
IPM Protection, Out-Of-Step Fault, Compressor Phase Overcurrent76
High Temperature and Overload Protection Diagnosis78
Start-Up Failure79
Out of Step Diagnosis for the Compressor80
Overload and Air Exhaust Malfunction Diagnosis81
Power Factor Correct or (PFC) Fault (a Fault of Outdoor Unit)82
Communication Malfunction83
Capacitor Charging Malfunction (Outdoor Unit Malfunction)85
IMP Protection, Desynchronizing Malfunction86
Diagnosis for High Temperature, Overload Protection88
Diagnosis for Failure Start up Malfunction (Outdoor Unit Malfunction)89
Diagnosis for Compressor Synchronism (Outdoor Unit Malfunction)90
Diagnosis for Overload and Discharge Malfunction91
Diagnosis Process for Outdoor Communication Circuit93
Exploded Views and Parts Lists94
Removal Procedure of Indoor Unit103
Removal Procedure of Outdoor Unit106
Reference Sheet of Celsius and Fahrenheit124
Configuration of Connection Pipe124
Pipe Expanding Method125
List of Resistance for Ambient Temperature Sensor126

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Willis WMI12MH16S Specifications

General

Brand	Willis
Model	WMI12MH16S
Category	Air Conditioner
Language	English

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Willis WMI12MH16S - User Manual

Table of Contents

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