Gree GRS-CQ8.0Pd/NaEK - Comp Low- Pressure Protection E3

Gree GRS-CQ8.0Pd/NaEK

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Test Operation & Troubleshooting & Maintenance

111

3.2 Comp Low- pressure Protection E3

Table of Contents

Table of Contents2
Product6
Product Data6
- Lineup6
  - Main Unit6
  - Water Tank7
- Nomenclature7
  - Main Unit7
- Product Features8
  - General8
  - Features8
- Operating Principle9
  - Schematic Diagram9
- Technical Data10
Outline Dimensions16
- Outline Dimensions of Outdoor Unit16
- Outline Dimensions of Indoor Unit18
Explosive Views and Part Lists19
Supply Scope29
Design and Selection31
Installation Example31
Model Selection33
- Speculations of Power Supply33
- Operation Conditions33
- Flowchart of Model Selection34
- Design Principle34
Selection of the Underfloor Coils34
- Calculation of Unit Load for Floor Heating34
- Selection of Tube Spacing of the Underfloor Coils35
- Selection of Loop Quantity of Coils for each Room35
  - Type of Underfloor Coils35
  - Selection of Loop Quantity for each Room36
Quantity and Location of the Water Traps and Collectors36
- Design Requirements on Loop Quantity for Circulation Water36
- Requirements on Installation of the Water Trap (Collector)38
Section of FCU38
- FCU Type Selection38
- Matching of Capacity38
Selection of the Water Tank39
- Specifications of the Water Tank39
- Volume Selection of the Water Tank39
Examples for Model Selection40
- General Introduction to the Example Project40
- Heat Load Calculation40
- Model Selection42
Unit Control43
Integral Control Concept43
- Control Principle Diagram43
- Control Flowchart46
Main Control Logics46
- Cooling46
  - Control to the Compressor46
  - Freeze Protection47
- Heating47
- Water Heating47
  - Water Heating by the Main Unit47
  - Water Heating by the Solar System48
- Shutdown48
- Control to the Compressor48
- Control to the Fan48
- Control to the 4-Way Valve49
- Control to the Water Pump49
- Control the Electrostatic Expansion Valve49
- Protection Control49
Controller50
- External View50
  - Keys & Indicating Leds50
  - Standby Page and Homepage51
- Operation Instructions52
Unit Installation84
Installation Guides84
- Installation Positions of the Outdoor Unit85
- Installation Positions of the Indoor Unit85
- Matters Need Attention85
Filed Supplied Pipes and Valves85
Service Tools87
Instalaltion Instructions88
- Installation Examples88
- Pre-Installation89
- Selection of Installation Location89
- Outline Dimension of Outdoor Unit90
- Installation Clearance Data92
- Outline Dimension of Indoor Unit92
- Installation Clearance Data93
- Installation of Water Tank93
- Electric Wiring96
- Wiring of the Terminal Board99
- Wiring of the 2-Way Valve101
- Wiring of The3-Way Valve102
- Wiring of Other Auxiliary Heat Sources103
- Wiring of the Gate-Controller103
- Wiring of the Remote Air Temperature Sensor104
- Wiring of the Thermostat105
- Wiring of the Control107
Commissioning and Trial Run109
- Check before Startup109
- Test Run110
Test Operation & Troubleshooting & Maintenance112
Trial Run112
- Check for Wiring112
- Check for the Water System112
- Check for the Communication System112
- Trial Run113
Error Code List113
Flow Chart of Troubleshooting115
- Comp High-Pressure Protection E1115
- Comp Low- Pressure Protection E3116
- Comp Discharge Temp Protection E4117
- Overload Protection of Compressor or Driver Error118
- DC Fan Error EF119
- Temperature Sensor Error119
- Communication Malfunction E6120
- Capacity Switch Error (Code:"C5")121
Diagnosis of Driving121
- Diagnosis Flowchart of Driving of Single-Phase Unit and Three-Phase Unit121
Daily Maintenance and Repair126
- Daily Maintenance126
- Troubleshooting127
- Repair127
  - Key Components127
  - Charging and Discharging of Refrigerant129

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