Gree DC Inverter U-Match Series Service Manual

3. Troubleshooting

3.1 Wiring Diagrams

The following electric diagrams are for reference only. Please refer to the diagrams sticked on the unit as the latest version.

3.1.1 Wiring Diagrams of ODUS

Model: GUD50W/NhB-S

The diagram illustrates the wiring connections for the outdoor unit (ODU) and indoor unit (IDU). It details power supply connections, component layouts, and various sensors and control elements. Key components include the compressor (COMP), fan motor (M), main control board (AP), wiring board (XT1, XT2, XT3), and various sensors like temperature sensors (T-SENSOR, 20K, 15K, 50K) and pressure switches (HP, LP). The diagram also indicates specific wiring notes for independent power supply, outdoor unit powering the indoor unit, units with earthing wire motors, and units with electric heating belts.

A component table lists symbols and their corresponding names, such as:

COMP: Compressor
AP: Main control board
XT1, XT2: Wiring board
EH: Electric heating belt of chassis
SAT: High pressure switch
LP: Low pressure switch
RT (20K): Speed adjustment temperature sensor
20K: Defrosting temperature sensor
15K: Ambient temperature sensor
50K: Discharge temperature sensor
EKV: Electronic expansion valve coil
4YW: 4-Way valve
XT3: Network interface

Model: GUD71W/NhB-S

Similar to the GUD50W/NhB-S, this diagram shows the ODU and IDU wiring. It includes the same types of components and notes regarding power supply and specific unit features.

Model: GUD100W/NhB-S

This section details wiring diagrams for various GUD models, including GUD100W/NhB-S, GUD125W/NhB-S, GUD140W/NhB-S, and GUD160W/NhB-S. The diagrams illustrate the connections between the outdoor and indoor units, highlighting components like the compressor, fan motors, control boards, and various sensors and valves. Notes explain specific wiring configurations for different unit features.

Model: GUD125W/NhB-S, GUD140W/NhB-S, GUD160W/NhB-S, GUD160W/NhB-X

These diagrams cover a range of models and their respective wiring configurations. They include detailed schematics for the outdoor unit and indoor unit, showing connections for power, control signals, sensors, and actuators. The diagrams also feature component layout maps and tables explaining the function of various symbols and interfaces.

Model: GUD50T/B-S, GUD71T/B-S, GUD100T/B-S, GUD125T/B-S, GUD140T/B-S

This section presents wiring diagrams for the Indoor Units (IDUs) of the T-series models. It shows the internal wiring of the IDU, including connections for power, sensors (e.g., ambient temperature, evaporator temperature), motors (DC motor, swing motor), and optional accessories like wired controllers and WIFI modules. Notes provide specific instructions for units with water pumps, gate control, iron shell motors, and other features.

Model: GUD50P/B-S, GUD50PS/B-S, GUD71PH/B-S, GUD71PHS/B-S, GUD100PH/B-S, GUD100PHS/B-S, GUD125PH/B-S, GUD125PHS/B-S, GUD140PH/B-S, GUD140PHS/B-S, GUD160PH/B-S, GUD160PHS/B-S

These diagrams focus on the indoor units of the P/PS/PH/PHS series. They illustrate the internal wiring, including connections for power, sensors, motors, and various control interfaces. The diagrams also detail the placement of components on the PCB and provide notes on optional accessories and specific unit configurations.

Model: GUD50ZD/B-S, GUD71ZD/B-S, GUD100ZD/B-S, GUD125ZD/B-S, GUD140ZD/B-S

This section provides wiring diagrams for the indoor units of the ZD series. It shows the internal wiring of the IDU, including connections for power, sensors, motors, and control interfaces. The diagrams also feature PCB layouts with numbered interfaces and corresponding descriptions, such as power supply, DC motor output, water level switch, and communication interfaces.

Model: GUD160W/NhB-X

This section includes wiring diagrams for the drive board of the GUD160W/NhB-X model. It details the connections for power input, compressor phase terminals, and communication interfaces. The diagram also shows the layout of components on the drive board.

3.2 PCB Layout

3.2.1 Interface

Indoor unit for GUD50ZD/B-S, GUD71ZD/B-S, GUD100ZD/B-S, GUD125ZD/B-S, GUD140ZD/B-S

The PCB layout for these indoor units is shown with numbered interfaces and a table detailing their functions. Key interfaces include:

CN6: Power supply
PUMP: DC water pump
WATER_DTCT: Water level switch
DOOR_C: Access control interface
COM1, COM2: Accessories communication interface
COM_MANAUL: Wired control communication interface
DISP2, DISP3: Light board interface
ROOM: Ambient temperature sensor interface
DC_MOTOR: DC motor output
UD_SWING1, UD_SWING2: Vertical swing output
COM_BMS: MODBUS gateway interface
COM_OUT: ODU communication interface
TUBE: Evaporator temperature sensor
HEAT: Electric heating interface
X3: Ground wire

Indoor unit for GUD50T/B-S, GUD71T/B-S, GUD100T/B-S, GUD125T/B-S, GUD140T/B-S

The PCB layout for these indoor units is presented with numbered interfaces and a table of their functions. Interfaces include AC-L, AC-N, DC_MOTOR, SS, UD_SWING2, UD_SWING1, DOOR_C, COM_BMS, COM1, COM2, COM_OUT, COM_MANUAL, TUBE, DISP2, DISP3, SWING_OUT1, SWING_OUT2, PUMP, HEAT, WATER_DTCT, and CN7.

Indoor unit for GUD50P/B-S, GUD71PH/B-S, GUD100PH/B-S, GUD125PH/B-S, GUD140PH/B-S, GUD160PH/B-S, GUD50PS/B-S, GUD71PHS/B-S, GUD100PHS/B-S, GUD125PHS/B-S, GUD140PHS/B-S, GUD160PHS/B-S

The PCB layout for these indoor units is detailed with numbered interfaces and their corresponding functions. These include AC-L, AC-N, PE, DC-MOTOR, CN6, COM-OUT, COM-MANUAL, COM1, COM2, COM_BMS, DOOR_C, ROOM, TUBE, WATER_DTCT, HEAT, JUMP, and PUMP.

3.3 Error Code

This section lists various error codes and their corresponding descriptions for the Gree DC Inverter U-Match Series air conditioning units. The errors relate to different operational aspects and sensor readings:

E1: Compressor high pressure protection
E2: Indoor anti-freeze protection
E3: Compressor low pressure protection, refrigerant lack protection and refrigerant collection mode
E4: Compressor air discharge high-temperature protection
E6: Communication error
E8: Indoor fan error
E9: Water-full protection
F0: Indoor ambient temperature sensor error
F1: Evaporator temperature sensor error
F2: Condenser temperature sensor error
F3: Outdoor ambient temperature sensor error
F4: Discharge temperature sensor error
F5: Wired controller temperature sensor error

	Gree R32 U-Match Under Ceiling Air Conditioner Spare Parts List Comprehensive spare parts list for Gree R32 U-Match Under Ceiling air conditioner models including GUD50ZD/B-S, GUD71ZD/B-S, GUD100ZD/B-S, GUD125ZD/B-S, and GUD140ZD/B-S. Includes exploded views and part codes.
	Gree DC Inverter U-match Series Cassette Type Unit Owner's Manual Owner's manual for Gree DC Inverter U-match Series Cassette Type Air Conditioners, covering installation, operation, maintenance, and safety. Includes model details and troubleshooting.
	GREE MultiPRO Quick Reference Guide: Specifications and Installation Details Comprehensive quick reference guide for GREE MultiPRO HVAC systems. Covers outdoor unit specifications, indoor unit models, combination rules, control options, and essential refrigerant piping installation guidelines for efficient system setup.
	GREE MULTIPRO Quick Reference Guide: HVAC System Specs & Installation Quick reference guide for GREE MULTIPRO HVAC systems. Features outdoor/indoor unit specs, combination rules, controls, accessories, and piping guidelines for installation and operation.
	Intertek Authorization to Mark: Gree Split Type Air Conditioner Heat Pump Models Official Intertek authorization for the application of the Certification Mark to various Gree, Kinghome, and Tosot Split Type Air Conditioner Heat Pump models, including model numbers and compliance standards.
	Gree Ultra Heat GMV5 Multi VRF Technical Sales Guide This technical sales guide provides comprehensive information on the Gree Ultra Heat GMV5 Multi VRF air conditioning system, detailing product features, system equipment, controller options, selection procedures, refrigerant piping design, wiring principles, technical specifications, and installation dimensions.
	Gree GMV5 Home DC Inverter Multi VRF Units Service Manual Comprehensive service manual for Gree GMV5 Home DC Inverter Multi VRF Units, covering product introduction, basic parameters, installation, commissioning, maintenance, and software monitoring. This guide is essential for professional operators to ensure correct installation, operation, and maintenance for optimal performance and safety.
	Gree GMV5 Home DC Inverter Multi VRF Units Service Manual Comprehensive service manual for Gree GMV5 Home DC Inverter Multi VRF Units, detailing installation, operation, maintenance, and troubleshooting for integrated HVAC systems.