Haier 2U18MS2VHB Manuals

3

A-1 Introduction

• • 3

    Table of Contents

• 4

  Safety & Precautions

• 5

  Specifications

  • 5

    Outdoor Units
  • 6

    Highwall Indoor
  • 6

    Ducted Indoor
  • 7

    Cassette Indoor
  • 7

    Console Indoor
  • 7

    MID-Static Ducted Indoor

• 8

  Functions and Control

  • 8

    Auto Mode
  • 8

    Cooling Operation Mode
  • 8

    Dry Mode (Dehumidifying Mode
  • 9

    Heat Mode
  • 9

    Indoor Fan Control
  • 9

    Cold Air-Proof Operation
  • 9

    Timing
  • 9

    Indoor System Mode Conflict
  • 10

    Abnormality Confirmation Approaches
  • 10

    Low Load Protection Control
  • 10

    High Load Protection Control
  • 10

    When the Compressor First Starts
  • 10

    The Outdoor Fan Control (Exchange Fan
  • 10

    The Outdoor Fan Control When in Cooling or Dehumidifying Mode
  • 11

    Over-Temperature Heat Mode Indoor Coil

13

Outdoor Technical Overview 2U18Ms2Vhb 3U24Ms2Vhb 4U36Ms2Vhb

• 14

  Components

  • 14

    Service Monitor Board (SMB
  • 14

    Module Circuit Board (MCB
  • 15

    Electronic Control Unit Circuit Board (ECU
  • 16

    Power Circuit Board (PCB
  • 17

    Outdoor Fan Motor
  • 17

    Low Pressure Switch
  • 17

    Way Valve
  • 17

    High Pressure Switch
  • 18

    Compressor
  • 18

    EEV Valves
  • 18

    Crankcase Heater
  • 19

    Temperature Sensors

• 20

  Operations

  • 20

    Cooling Mode Sequence of Operation
  • 22

    Heating Mode Sequence of Operation
  • 24

    Outdoor Frequency Control
  • 24

    Electronic Expansion Valve (EEV) Control
  • 24

    Valve Adjustments Due to Hot Gas Discharge Temperature Limits
  • 24

    4-Way Valve Control During Heating Mode
  • 24

    Crankcase Heater Control
  • 24

    On Demand Defrost Logic
  • 25

    Initiating Forced Defrost Operation
  • 25

    Defrosting Time Flowchart
  • 25

    Frequency Control and Compressor Discharge Line Temperature
  • 25

    Frequency Control When There Is CT Over-Current Protection
  • 25

    High Pressure Protection
  • 25

    Low Pressure Protection
  • 26

    Forced Defrost Operation
  • 26

    Preventing Compressor Overcurrent
  • 26

    The Protection Function of AC Current
  • 26

    Antifreezing Protection of the Indoor Heat Exchanger

• 27

  Testing

  • 27

    Outdoor Fan Motor
  • 27

    Temperature Sensor
  • 28

    4-Way Valve
  • 28

    Electronic Expansion Valve (EEV
  • 29

    Variable Speed Compressor
  • 29

    Wiring Error Check

• 30

  Wiring Diagrams

• 33

  DIP Switch Settings

• 35

  Error Codes

37

Wall Mount Technical Overview Aw07Lc2Vhb Aw09Lc2Vhb Aw12Lc2Vhb Aw18Lc2Vhb Aw24Lp2Vha

• 38

  Components

  • 38

    Component Overview
  • 39

    Indoor Wall Mount Unit Circuit Board

• 41

  Testing

  • 41

    Accessing Components/Removing Cover
  • 42

    Indoor Fan Motor Voltage Check
  • 42

    Replacing the Blower Motor
  • 44

    Testing Temperature Sensors
  • 44

    Testing Louver Motors
  • 44

    Testing Communication Circuit

• 45

  Wiring Diagram

• 46

  Error Codes

47

Compact Cassette Technical Overview Ab09Sc2Vha Ab12Sc2Vha Ab18Sc2Vha

• 48

  Components

  • 48

    Component Overview
  • 50

    Cassette Unit Indoor Circuit Board

• 51

  Testing

  • 51

    Accessing the Blower Motor and Condensate Pump
  • 51

    Removing Fan Motor
  • 51

    Removing Condensate Pump
  • 52

    Indoor Fan Motor Test Procedure
  • 52

    Testing Temperature Sensors
  • 53

    Testing Louver Motors
  • 53

    Testing Communication Circuit
  • 54

    Test Condensate Pump and Associated Float Switch

• 55

  Wiring Diagram & DIP Switch Settings

• 56

  Error Codes

57

Large Cassette Technical Overview Al24Lp2Vha

• 58

  Components

  • 58

    Component Overview
  • 60

    Cassette Unit Indoor Circuit Board

• 61

  Testing

  • 61

    Accessing the Blower Motor and Condensate Pump
  • 61

    Removing Fan Motor
  • 61

    Removing Condensate Pump
  • 62

    Indoor Fan Motor Test Procedure
  • 62

    Testing Temperature Sensors
  • 63

    Testing Louver Motors
  • 63

    Testing Communication Circuit
  • 64

    Test Condensate Pump and Float Switch

• 65

  Wiring Diagram

69

Slim Duct Technical Overview Ad07Sl2Vhb Ad09Sl2Vhb Ad12Sl2Vhb Ad18Sl2Vhb

• 70

  Components

  • 70

    Component Overview
  • 71

    Indoor Unit Circuit Board

• 73

  Ductwork/Grilles

• 74

  Testing

  • 74

    Test Condensate Pump and Float Switch
  • 74

    Testing Communication Circuit
  • 75

    Testing Temperature Sensors
  • 75

    Indoor Fan Motor Voltage Check

79

MID-Static Ducted Technical Overview Usym09Ucdsa Usym12Ucdsa Usym18Ucdsa Usym24Ucdsa

• 91

  DIP Switch Settings

• 92

  Wiring Diagram & DIP Switch Settings

• 92

  Error Codes

93

Am24Lp2Vha

• 94

  Components

  • 94

    Component Overview
  • 95

    Indoor Unit Circuit Board
  • 97

    Ductwork/Grilles
    • 98

      Test Condensate Pump and Associated Float Switch

• 98

  Ductwork/Grilles

  • 98

    Test Condensate Pump and Float Switch
  • 98

    Testing Communication Circuit
  • 99

    Testing Temperature Sensors
  • 99

    Indoor Fan Motor Voltage Check
  • 100

    Wiring Diagram

• 98

  Testing

• 101

  Wiring Diagram

• 101

  DIP Switch Settings

• 102

  Error Codes

103

Console Technical Overview Usyf09Ucdwa Usyf12Ucdwa Usyf18Ucdwa

• 104

  Components
  • 104

    Component Overview
  • 105

    Indoor Circuit Board
  • 106

    Removing the Filter Cover & Filter
  • 106

    Front Cover Removal
  • 106

    Control Box Removal
  • 106

    Board Replacement
  • 107

    Upper Louver Removal
  • 107

    Lower Damper Assembly Removal

113

Troubleshooting & References

• 115

  Special Functions

  • 115

    Auto Restart
  • 115

    Forced Defrost
  • 115

    Indoor Temperature Display (Highwall Only
  • 115

    Enhanced Defrost
  • 116

    Temperature Compensation

• 119

  Resistance Chart / Sensor Definitions

• 119

  Matching Tables

• 120

  Resistance Values

  • 120

    Louver Motors
  • 120

    Eev

• 121

  Component Ratings

  • 121

    4-Way Valve
  • 121

    Basepan Heater
  • 121

    Reactor
  • 121

    Fan Motors

• 122

  Refrigeration Diagrams

• 125

  Master Error Code Chart

• 129

  Outdoor Unit Error Codes

  • 129

    Pressure-Related Error Codes
  • 129

    Communication Error Code
  • 130

    Error Codes Caused by Abnormal Refrigerant Circuit Conditions
  • 130

    Outdoor Error Code Related to Indoor Unit
  • 130

    Error Code Related to the PCB
  • 130

    Error Codes Related to the IPM
  • 131

    Error Codes Related to Compressor, Outdoor Fan & 4-Way Valve

• 132

  Flow Charts

  • 132

    Outdoor EEPROM Malfunction
  • 132

    Outdoor IPM over Current or Short Circuit
  • 133

    Communication Abnormal between PCB and IPM
  • 133

    DC Voltage or AC Voltage High
  • 134

    Replace Fan Motor
    • 134

      Discharge Temperature too High Protection
    • 134

      DC Fan Motor Fault
  • 135

    Outdoor Defrosting Temp. Sensor te Abnormal
  • 135

    Suction Temp.sensor Ts Abnormal
  • 135

    Outdoor Ambient Temp. Sensor Ta Abnormal
  • 135

    Discharging Temp. Sensor Td Abnormal
  • 135

    Communication Abnormal between Indoor Unit and Outdoor Unit
  • 136

    Lack of Refrigerant or Discharging Pipe Blocked
  • 136

    4-Way Valve Reversing Failure
  • 137

    Compressor Motor Desynchronizing
  • 137

    Compressor Startup Failure
  • 137

    Input Overcurrent of the Drive Module
  • 138

    Open High Pressure Switch
  • 138

    Open Low Pressure Switch
  • 139

    High Pressure Detected in System
  • 139

    Low Pressure Detected in System

• 1

  Table of Contents

2

Outdoor Unit Installation

• 2

  Introduction - Overview
• 5

  Step 1 - Preparation
• 6

  Step 2 - Installation of the Outdoor Unit
• 6

  Step 3 - Refrigerant Line Connections
• 8

  Step 4 - Leak Test and Evacuation
• 10

  Step 5 - Electrical Connections
• 11

  Step 5 - Electrical Connections
• 12

  Step 6 - Charging
• 12

  Step 7 - System Test
• 12

  Step 8 - Explaining Operation to the End User
• 13

  Seacoast Application
• 13

  Outdoor Unit Installation

14

Indoor Unit Installation - Cassette

• 14

  Introduction - Overview
• 16

  Step 1 - Preparation
• 17

  Step 2 - Installation of the Cassette Unit
• 19

  Step 3 - Electrical Connections
• 19

  Step 4 - Louver Installation
• 19

  Step 5 - Pull Vacuum On System

20

Indoor Unit Installation - Wall Mount

• 20

  Introduction - Overview
• 21

  Step 1 - Preparation
• 22

  Step 2 - Installation of the Wall Mount Unit
• 23

  Step 2 - Installation of the Wall Mount Unit
• 24

  Step 3 - Electrical Connections
• 24

  Step 4 - Pull Vacuum On System

25

Remote Controller