1.1 About This Document
4
1.1.1 Meaning Of Warnings And Symbols
5
2.1 For The Installer
7
2.1.1 General
7
2.1.2 Installation Site
8
2.1.3 Refrigerant — In Case Of R410A Or R32
11
2.1.4 Electrical
12
4.1 Overview: About The Box
21
4.2 Outdoor Unit
21
4.2.1 To Unpack The Outdoor Unit
21
4.2.2 To Handle The Outdoor Unit
21
4.2.3 To Remove The Accessories From The Outdoor Unit
22
5.1 Identification
23
5.1.1 Identification Label: Outdoor Unit
23
6.1 Preparing The Installation Site
24
6.1.1 Installation Site Requirements Of The Outdoor Unit
25
6.1.2 Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates
27
6.2 Opening The Unit
28
6.2.1 About Opening The Unit
28
6.2.2 To Open The Outdoor Unit
28
6.3 Mounting The Outdoor Unit
28
6.3.1 About Mounting The Outdoor Unit
28
6.3.2 Precautions When Mounting The Outdoor Unit
29
6.3.3 To Provide The Installation Structure
29
6.3.4 To Install The Outdoor Unit
30
6.3.5 To Provide Drainage
30
6.3.6 To Prevent The Outdoor Unit From Falling Over
30
7.1 Preparing Refrigerant Piping
32
7.1.1 Refrigerant Piping Requirements
32
7.1.2 Refrigerant Piping Insulation
33
7.1.3 Refrigerant Piping Length And Height Difference
33
7.2 Connecting The Refrigerant Piping
33
7.2.1 About Connecting The Refrigerant Piping
33
7.2.2 Precautions When Connecting The Refrigerant Piping
34
7.2.3 Guidelines When Connecting The Refrigerant Piping
35
7.2.4 Pipe Bending Guidelines
36
7.2.5 To Flare The Pipe End
36
7.2.6 Using The Stop Valve And Service Port
36
7.2.7 To Connect The Refrigerant Piping To The Outdoor Unit
38
7.3 Checking The Refrigerant Piping
38
7.3.1 About Checking The Refrigerant Piping
38
7.3.2 Precautions When Checking The Refrigerant Piping
39
7.3.3 To Check For Leaks
39
7.3.4 To Perform Vacuum Drying
40
8.1 About Charging Refrigerant
42
8.2 About The Refrigerant
43
8.3 Precautions When Charging Refrigerant
44
8.4 To Determine The Additional Refrigerant Amount
44
8.5 To Determine The Complete Recharge Amount
44
8.6 To Charge Additional Refrigerant
44
8.7 To Fix The Fluorinated Greenhouse Gases Label
45
9.1 About Connecting The Electrical Wiring
46
9.1.1 Precautions When Connecting The Electrical Wiring
46
9.1.2 Guidelines When Connecting The Electrical Wiring
48
9.1.3 Specifications Of Standard Wiring Components
49
9.2 To Connect The Electrical Wiring To The Outdoor Unit
49
10.1 To Finish The Outdoor Unit Installation
51
10.2 Closing The Unit
51
10.2.1 To Close The Outdoor Unit
51
11.1 Facility Setting
52
11.1.1 To Set The Facility Mode
52
12.1 Overview: Commissioning
53
12.2 Precautions When Commissioning
53
12.3 Checklist Before Commissioning
54
12.4 Checklist During Commissioning
54
12.5 To Perform A Test Run
54
12.6 Starting Up The Outdoor Unit
55
14.1 Overview: Maintenance And Service
57
14.2 Maintenance Safety Precautions
57
14.3 Checklist For Yearly Maintenance Of The Outdoor Unit
58
14.4 About The Compressor
58
14.5 Winter Season
58
15.1 Overview: Troubleshooting
59
15.2 Precautions When Troubleshooting
59
15.3 Solving Problems Based On Symptoms
59
15.3.1 Symptom: Indoor Units Fall, Vibrate Or Make Noise
59
15.3.2 Symptom: The Unit Is Not Heating Or Cooling As Expected
60
15.3.3 Symptom: Water Leakage
60
15.3.4 Symptom: Electrical Leakage
60
15.3.5 Symptom: Unit Does Not Function Or Burn Damage
60
15.4 Fault Diagnosis Using Led On Outdoor Unit Pcb
60
16.1 Overview: Disposal
61
16.2 To Pump Down
61
16.3 To Start And Stop Forced Cooling
62
16.3.1 To Start And Stop Forced Cooling Using The Indoor Unit On/Off Switch
62
16.3.2 To Start And Stop Forced Cooling Using The Indoor Unit User Interface
62
17.1 Wiring Diagram
63
17.1.1 Unified Wiring Diagram Legend
63
17.2 Piping Diagram
66
17.2.1 Piping Diagram: Outdoor Unit
66
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