Gree GWC09AA

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GREE Service Manual GWC09AA / K5NNA6A Page 110

Trouble Shooting for Compressor Low Pressure Protection

According to the below-provided diagram, identify the possible malfunction related to the compressor

low pressure protection and “E3” error code indication

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Table of Contents3
Table of Content3
Abbreviations Used with this Manual5
Introduction6
General Safety Instructions7
- The Symbols Used in this Manual7
- Electrical Operations9
- Installation Site9
- Minimum Room Size10
Minimum Requirements for Service Personnel Qualifica- Tion11
- Basics in RAC11
Checks for Putting in Operation12
Checks for Leakage12
Handling of Refrigerant12
Installation, Commissioning and Maintenance of a Compressor12
Installation, Commissioning and Maintenance of a Con- Denser13
Installation, Commissioning and Maintenance of an Evapora- Tor13
Piping13
Description of the System and Its Components14
- General Technical Specifications14
- Indoor Unit15
- Outdoor Unit16
- Refrigerant Transfer Pipe-Set17
Capacity Variation Ratio According to Temperature (Diagram)18
Operation Data18
Construction Views > Indoor Unit19
Construction Views > Outdoor Unit20
Refrigerant Flow Diagram21
Schematic Diagram > Electrical Wiring Indoor Unit22
Schematic Diagram > Electrical Wiring Outdoor Unit23
Printed Circuit Board (PCB)24
Relay Box26
Remote Controller > Functional Description27
Functional Specifications for AC System Operation31
- Cooling Mode31
- Dry Mode32
- System Protective Functions33
- Fan and Auto- Mode34
Other Adjustments and Functions of the Remote Controller35
Hydrocarbon Refrigerant R290 Issues38
- Refrigerant Properties / Parameters38
  - Flammability39
  - Hazard Identification39
- First Aid Measures40
  - Fire Fighting Measures41
  - Accidental Release Measures41
The Handling of HC R29042
- Refrigerant Recovery43
Refrigerant Pressure- Temperature Chart48
Flow of Work for AC System Installation, Service, Repair and Dismantling51
AC System Installation52
- Delivery Conditions of Indoor & Outdoor Unit52
- Important Notes52
- Principle Installation Arrangement53
- Tools, Equipment and Accessories54
- Security Advise for Installation55
- Table of Various Installation Height and Resulting Room Size56
  - The Installation Site > General Information56
- Installation Site > Outdoor Unit57
  - Installation Site > Indoor Unit57
- Installation Dimension Diagram58
- Miscellaneous60
  - Installation Procedure > Indoor Unit61
  - Installation of Connection Pipes and Cables62
- Installation of the Outdoor Unit65
  - Interconnection of In- and Outdoor Unit66
- The Quick-Coupler Valves67
Commissioning of the AC System68
- Checks before Commissioning68
- Refrigerant Circuit Commissioning68
- First Operation of the System68
- Indoor Unit68
- Outdoor Unit69
Handing over the System to Your Client69
Start-Up Data Sheet Form70
Service, Repair and Maintenance71
- Directives for Service and Maintenance71
- Regular Annual Preventive Maintenance72
- Maintenance of the Indoor Unit72
- Maintenance of the Outdoor Unit72
- Refrigerant Circuit72
- Maintenance Check-List73
- Safety Work Area & Temporary Flammable Zones74
- Arrangement of Equipment and Tools75
- Refrigerant Venting76
- Venting > Course of Activities > Part 177
- Venting > Part 1 > Detailed Procedure78
- Venting > Course of Activities > Part 279
- Venting > Part 2 > Detailed Procedure80
  - In the Field81
- Flushing the System with OFDN (N 2 )83
- Flushing the System and Provision of "Holding Charge" with84
  - OFDN > Detailed Procedure84
- Provision of a Hermetically Sealed Refrigerant Circuit85
- Leak, Strength and Tightness Testing85
- Leak Check (Bubble Test)87
- Electronic Gas Detectors88
- Leak Testing with OFDN & Weak Soapy Water Solution89
  - Leak Testing with OFDN and "Bubbles" > Detailed Proce- Dure90
- Trace Gas (N 2 /H 2 ) Leak Detection Method91
- Trace Gas Leak Detection > Detailed Procedure93
- Pressure Test (Strength Test) with OFDN94
- Pressure Test (Strength Test) > Detailed Procedure95
- Refrigerant Circuit-Evacuation and Charging96
- Evacuation > Detailed Procedure99
- Charging with Refrigerant100
- Charging with Refrigerant > Detailed Description101
- Start-Up Data Sheet Form for Service and Repair102
- Service Label103
Dismantling, Recycling and Disposal104
Error Codes, LED Flashing and Trouble Shooting105
- Temperature Sensor Trouble Shooting106
- PG Motor (H6) Trouble Shooting107
- Jumper Cap (C5) Trouble Shooting108
- Freeze Protection (E2) Trouble Shooting109
- Low Pressure (E3) Trouble Shooting110
- PCB Board (U8) Trouble Shooting111
- Resistance Table for Temperature Sensors112
Main Spare-Parts List115
Disassembling Procedures116
- Disassembling the Indoor Unit116
- Disassembling the Outdoor Unit121
Exploded Views and Part Lists126
- Exploded View of the Indoor Unit126
- Part List of the Indoor Unit127
- Exploded View of the Outdoor Unit128
- Part List of the Outdoor Unit129
Recommended Equipment and Tools for the Use with HC Refrigerants130

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