Table of Contents
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Outdoor Models
Appearances vary by model
• Please read this manual before using the heat pump.
• Keep this user manual for future reference.
Before troubleshooting or servicing
equipment, review equipment installation
met. Including, but not limited to: wiring,
clearance, ducting (where applicable),
power, and line set requirements. Correct
any installation issues before continuing.
Multi-Zone
Ductless Multi-Split Heat Pumps
Indoor Models
Appearances vary by model
Service Manual
Wall Mount - Highwall
2'x2' Compact Cassette
Slim Duct
Mid-Static Ducted
Console
31-5000942 Rev. 0
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Chapters
Table of Contents
Related Manuals for Haier GE FlexFit 5U42MS2HDA
Summarization of Contents
SPECIFICATIONS
Outdoor Unit Specifications
Technical specifications for outdoor units (2, 3, 4 Zones).
Highwall Indoor Unit Specifications
Specifications for Highwall indoor units (WiFi and adaptable models).
Ducted Indoor Unit Specifications
Specifications for Slim and Mid-Static Ducted indoor units.
Cassette & Console Indoor Unit Specifications
Specifications for Cassette, Console, and Large Cassette indoor units.
FUNCTIONS AND CONTROL
Operation Modes and Fan Control
Details on Auto, Cooling, Dry, and Heat modes, plus fan control.
Protection Mechanisms
Covers cold air-proof, low load, high load, and over-temperature protections.
Special Operation Cycles
Explains defrost cycle, EEV, 4-way valve, and oil return logic.
OUTDOOR UNITS - COMPONENTS & OPERATION
Component Overview
Identification and location of major outdoor unit components.
Service Monitor Boards & IPM
Features and function of the Service Monitor Board and IPM.
PCB Overview
Detailed breakdown of the Printed Circuit Board (PCB) and connectors.
Cooling, Heating, and Defrost Operation
Detailed operation sequences for cooling, heating, and defrost cycles.
OUTDOOR UNITS - SERVICE PROCEDURES
Fan Motor & 4-Way Valve Testing
Procedures for testing outdoor fan motor and 4-way valve.
Sensor & EEV Testing
Methods for testing temperature sensors and EEVs.
OUTDOOR UNITS - WIRING DIAGRAMS
Model-Specific Wiring Diagrams
Detailed wiring diagrams for various outdoor unit models.
INDOOR/OUTDOOR WIRING CONNECTION DIAGRAMS
Model-Specific Connection Diagrams
Wiring diagrams showing connections between outdoor and indoor units.
OUTDOOR UNIT ERROR CODES
LED Display Error Codes
Table of outdoor unit error codes indicated by LED display.
Refrigerant & Piping Notes
Notes on refrigerant type and maximum piping lengths.
HIGHWALL INDOOR UNITS
Components Overview
Identification of highwall indoor unit components.
Circuit Board Details
Identification of components on the highwall indoor unit circuit board.
Service Procedures
Procedures for disassembly, testing, and replacement.
Wiring Diagram
Electrical wiring diagram for highwall indoor units.
Error Codes
Table of error codes and their meanings for highwall indoor units.
COMPACT CASSETTE INDOOR UNITS
Components Overview
Identification of compact cassette indoor unit components.
Circuit Board Details
Identification of components on the compact cassette circuit board.
Service Procedures
Procedures for testing and maintenance of compact cassette units.
Error Codes
Table of error codes and their meanings for compact cassette indoor units.
LARGE CASSETTE INDOOR UNITS
Components Overview
Identification of large cassette indoor unit components.
Circuit Board Details
Identification of components on the large cassette circuit board.
Service Procedures
Procedures for disassembly, testing, and replacement of large cassette units.
Wiring Diagram & DIP Switch Settings
Diagrams and settings for large cassette indoor units.
Error Codes
Table of error codes and their meanings for large cassette indoor units.
MID-STATIC DUCTED INDOOR UNITS
Components Overview
Identification of mid-static ducted indoor unit components.
Circuit Board Details
Identification of components on the ducted unit circuit board.
Service Procedures
Procedures for disassembly, testing, and replacement of ducted units.
Wiring Diagram & DIP Switch Settings
Diagrams and settings for mid-static ducted indoor units.
Error Codes
Table of error codes and their meanings for mid-static ducted indoor units.
SLIM DUCT INDOOR UNITS
Components Overview
Identification of slim duct indoor unit components.
Circuit Board Details
Identification of components on the slim duct unit circuit board.
Control & Logic
DIP switch settings and condensate pump logic for slim duct units.
Ductwork/Grilles
Basic duct configurations and installation guidelines.
Service Procedures
Procedures for testing and maintenance of slim duct units.
Wiring Diagram & DIP Switch Settings
Diagrams and settings for slim duct indoor units.
Error Codes
Table of error codes and their meanings for slim duct indoor units.
CONSOLE INDOOR UNITS
Components Overview
Identification of console indoor unit components.
Circuit Board Details
Identification of components on the console unit circuit board.
Service Procedures
Procedures for disassembly, testing, and replacement of console units.
Wiring Diagram/DIP Switch Settings
Diagrams and settings for console indoor units.
Error Codes
Table of error codes and their meanings for console indoor units.
SPECIAL FUNCTIONS
Auto Restart & Forced Defrost
Functions for automatic restart after power loss and forced defrost.
Temperature Display & Compensation
Setting display options and adjusting temperature compensation.
Enhanced Defrost
Enabling and disabling enhanced defrost modes.
MATCHING TABLES
Outdoor to Indoor Unit Combinations
Tables showing compatible indoor units for various outdoor configurations.
Refrigerant Line Adapters
Part numbers for refrigerant line adapters.
RESISTANCE VALUES
Sensor Definitions & Resistance Tables
Definitions and resistance values for temperature sensors.
Motor Resistance Values
Resistance values for various louver motors and EEVs.
COMPONENT TESTING
4-Way Valve & Base Pan Heater Testing
Testing procedures for the 4-way valve and base pan heater.
Fan Motor Testing
Procedure for testing DC fan motors on indoor and outdoor units.
REFRIGERATION DIAGRAMS
Model-Specific Refrigeration Diagrams
Refrigeration flow diagrams for various outdoor unit models.
OUTDOOR UNIT ERROR CODES
PCB & Refrigerant Circuit Errors
Error codes related to PCB failures and refrigerant circuit issues.
Sensor & Pressure Switch Errors
Error codes for temperature sensor and pressure switch failures.
Communication & IPM Errors
Error codes for communication failures and IPM-related issues.
TROUBLESHOOTING FLOW CHARTS
EEPROM/IPM/Communication Faults
Flowcharts for diagnosing EEPROM, IPM, and communication issues.
Refrigerant/4-Way Valve/Compressor Issues
Flowcharts for diagnosing refrigerant, 4-way valve, and compressor problems.
Pressure Switch & System Faults
Flowcharts for diagnosing pressure switch and system pressure faults.
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