Gree GMV-280WM/E-X - Page 217

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GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL

213

full protection happens.

Possible reason：

■IDU is installed improperly

■Drainage pump is broken

■Float switch operates abnormally

■IDU mainboard is abnormal

Troubleshooting:

Main Page

Table of Contents2
Preface5
Chapter 1 Introduction to Basic Features of Units5
Basic Operating Principle5
Model List6
Internal Piping Design of the Units7
Basic Parameters of Unit11
Electrical Parameters15
Optional Accessories19
Basic Requirement for Pipe Connection20
Precautions on Refrigerant Leakage23
Unit Operating Temperature23
Chapter 2 Installation24
Engineering Installation Preparation24
Installation Safety24
Importance of Installation Engineering24
Cooperation between Different Professions26
Onsite Review of Design Drawing28
Construction Organization Process29
Material Selection29
Requirement for Selecting Construction Materials29
Requirement for Selecting Major Materials30
Installation Space Requirement31
Place Selection for Installing ODU31
ODU Dimensions and Installation Hole Size32
Installation Space Requirement for ODU33
Requirements on Foundation Installation40
ODU Foundation40
ODU Fixing40
Vibration Reduction for ODU41
Precautions When Installing the Connection Pipe41
Piping Connection42
Schematic Diagram of Piping Connection42
Schematic Diagram of Piping Sequence42
Allowable Pipe Length and Drop Height Among Indoor and Outdoor Units43
Connection Pipe Among Outdoor Modules45
Fitting Pipe between Outdoor Unit and the First Manifold47
Pipe Installation and Insulation53
Pipe Installation for the Cooling System53
Pipe Installation for the Condensate Water System62
Insulation System66
Electric and Controller Installation67
Precautions67
Installation of the Power Cable68
Installation of the Communication System70
Vacuumization and Desiccation for the Refrigerant System72
Air-Tightness Test72
Vacuumization and Desiccation for the System73
Refrigerant Perfusion74
Calculation Method for Perfusing Refrigerant74
Method for Perfusing Refrigerant76
Chapter 3 Commissioning Operation78
Security Requirements78
Precautions for Construction78
Precautions for the Use of Refrigerants78
Introduction to Unit Functions78
System Function DIP Switch Settings78
System Function Button Operations84
Commissioning Process99
Necessity of VRF Engineering Commissioning100
Required Files and Tools for Engineering Commissioning100
Engineering Commissioning Procedures100
References for Proper Unit Operation Parameters123
Chapter 4 Maintenance126
Part 1 Failure Code Table126
System Failure Code Table126
Part 2 Exception and Troubleshooting130
Exception Analyzing and Troubleshooting130
Form Analyzing130
Gas-Mixing Protection of 4-Way Valve138
Key Parts Maintenance240
Cautions on Controller AP1 Replacement240
Compressor Replacement and Cautions245
Cautions on Compressor Drive Replacement270
Assembling and Disassembling Key Parts of Odus273
Exploded Views and Spaer Part List286
Common Parameter Lists298
R410A Refrigerant Pressure / Saturation Temperature List298
Resistance / Temperature Lists of Temperature Sensors299
Voltage / Pressure Lists of Pressure Sensors305

Gree GMV-280WM/E-X - Page 217

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