1.1 About This Document
4
2.1 About The Documentation
5
2.1.1 Meaning Of Warnings And Symbols
5
2.2 For The Installer
6
2.2.1 General
6
2.2.2 Installation Site
7
2.2.3 Refrigerant — In Case Of R410A Or R32
11
2.2.4 Brine
12
2.2.5 Water
13
2.2.6 Electrical
13
4.1 Overview: About The Box
22
4.2 Outdoor Unit
22
4.2.1 To Unpack The Outdoor Unit
22
4.2.2 To Remove The Accessories From The Outdoor Unit
23
5.1 Overview: About The Unit
24
5.2 Identification
24
5.2.1 Identification Label: Outdoor Unit
24
6.1 Preparing The Installation Site
25
6.1.1 Installation Site Requirements Of The Outdoor Unit
26
6.1.2 Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates
28
6.2 Opening The Unit
29
6.2.1 About Opening The Unit
29
6.2.2 To Open The Outdoor Unit
29
6.3 Mounting The Outdoor Unit
29
6.3.1 About Mounting The Outdoor Unit
29
6.3.2 Precautions When Mounting The Outdoor Unit
30
6.3.3 To Provide The Installation Structure
30
6.3.4 To Install The Outdoor Unit
31
6.3.5 To Provide Drainage
31
6.3.6 To Prevent The Outdoor Unit From Falling Over
31
7.1 Preparing Refrigerant Piping
33
7.1.1 Refrigerant Piping Requirements
33
7.1.2 Refrigerant Piping Insulation
33
7.1.3 Refrigerant Piping Length And Height Difference
34
7.2 Connecting The Refrigerant Piping
34
7.2.1 About Connecting The Refrigerant Piping
34
7.2.2 Precautions When Connecting The Refrigerant Piping
35
7.2.3 Guidelines When Connecting The Refrigerant Piping
36
7.2.4 Pipe Bending Guidelines
36
7.2.5 To Flare The Pipe End
37
7.2.6 Using The Stop Valve And Service Port
37
7.2.7 To Connect The Refrigerant Piping To The Outdoor Unit
39
7.3 Checking The Refrigerant Piping
39
7.3.1 About Checking The Refrigerant Piping
39
7.3.2 Precautions When Checking The Refrigerant Piping
40
7.3.3 To Check For Leaks
40
7.3.4 To Perform Vacuum Drying
41
8.1 About Charging Refrigerant
43
8.2 About The Refrigerant
44
8.3 Precautions When Charging Refrigerant
45
8.4 To Determine The Additional Refrigerant Amount
45
8.5 To Determine The Complete Recharge Amount
45
8.6 To Charge Additional Refrigerant
45
8.7 To Fix The Fluorinated Greenhouse Gases Label
46
9.1 About Connecting The Electrical Wiring
47
9.1.1 Precautions When Connecting The Electrical Wiring
47
9.1.2 Guidelines When Connecting The Electrical Wiring
49
9.1.3 Specifications Of Standard Wiring Components
50
9.2 To Connect The Electrical Wiring To The Outdoor Unit
50
10.1 To Finish The Outdoor Unit Installation
52
10.2 To Close The Outdoor Unit
52
11.1 Facility Setting
53
11.1.1 To Set The Facility Mode
53
12.1 Overview: Commissioning
54
12.2 Precautions When Commissioning
54
12.3 Checklist Before Commissioning
54
12.4 Checklist During Commissioning
55
12.5 To Perform A Test Run
55
12.6 Starting Up The Outdoor Unit
56
14.1 Overview: Maintenance And Service
58
14.2 Maintenance Safety Precautions
58
14.3 Checklist For Yearly Maintenance Of The Outdoor Unit
58
14.4 About The Compressor
59
15.1 Overview: Troubleshooting
60
15.2 Precautions When Troubleshooting
60
15.3 Solving Problems Based On Symptoms
60
15.3.1 Symptom: Indoor Units Fall, Vibrate Or Make Noise
60
15.3.2 Symptom: The Unit Is Not Heating Or Cooling As Expected
61
15.3.3 Symptom: Water Leakage
61
15.3.4 Symptom: Electrical Leakage
61
15.3.5 Symptom: Unit Does Not Function Or Burn Damage
61
15.4 Fault Diagnosis Using Led On Outdoor Unit Pcb
61
16.1 Overview: Disposal
62
16.2 To Pump Down
62
16.3 To Start And Stop Forced Cooling
63
16.3.1 To Start And Stop Forced Cooling Using The Indoor Unit On/Off Switch
63
16.3.2 To Start And Stop Forced Cooling Using The Indoor Unit User Interface
63
17.1 Wiring Diagram
64
17.1.1 Unified Wiring Diagram Legend
64
17.2 Piping Diagram
67
17.2.1 Piping Diagram: Outdoor Unit
67
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