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
21
4.2 Outdoor Unit
21
4.2.1 To Unpack The Outdoor Unit
21
4.2.2 To Remove The Accessories From The Outdoor Unit
22
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
32
7.1 Preparing Refrigerant Piping
33
7.1.1 Refrigerant Piping Requirements
33
7.1.2 Refrigerant Piping Insulation
34
7.1.3 Refrigerant Piping Length And Height Difference
35
7.2 Connecting The Refrigerant Piping
36
7.2.1 About Connecting The Refrigerant Piping
36
7.2.2 Precautions When Connecting The Refrigerant Piping
36
7.2.3 Guidelines When Connecting The Refrigerant Piping
38
7.2.4 Pipe Bending Guidelines
38
7.2.5 To Flare The Pipe End
39
7.2.6 Connections Between Outdoor And Indoor Unit Using Reducers
39
7.2.7 Using The Stop Valve And Service Port
42
7.2.8 To Connect The Refrigerant Piping To The Outdoor Unit
43
7.3 Checking The Refrigerant Piping
44
7.3.1 About Checking The Refrigerant Piping
44
7.3.2 Precautions When Checking The Refrigerant Piping
44
7.3.3 To Check For Leaks
45
7.3.4 To Perform Vacuum Drying
45
8.1 About Charging Refrigerant
47
8.2 About The Refrigerant
48
8.3 Precautions When Charging Refrigerant
49
8.4 To Determine The Additional Refrigerant Amount
49
8.5 To Determine The Complete Recharge Amount
49
8.6 To Charge Additional Refrigerant
50
8.7 To Fix The Fluorinated Greenhouse Gases Label
50
9.1 About Connecting The Electrical Wiring
51
9.1.1 Precautions When Connecting The Electrical Wiring
51
9.1.2 Guidelines When Connecting The Electrical Wiring
53
9.1.3 Specifications Of Standard Wiring Components
54
9.2 To Connect The Electrical Wiring To The Outdoor Unit
55
10.1 To Finish The Outdoor Unit Installation
57
10.2 To Close The Outdoor Unit
57
11.1 About Standby Electricity Saving Function
58
11.1.1 To Turn On Standby Electricity Saving Function
58
11.2 About Priority Room Function
59
11.2.1 To Set The Priority Room Function
59
11.3 About Night Quiet Mode
59
11.3.1 To Turn On The Night Quiet Mode
59
11.4 About Heat Mode Lock
60
11.4.1 To Turn On Heat Mode Lock
60
11.5 About Cool Mode Lock
60
11.5.1 To Turn On Cool Mode Lock
60
12.1 Overview: Commissioning
62
12.2 Precautions When Commissioning
62
12.3 Checklist Before Commissioning
62
12.4 Checklist During Commissioning
63
12.5 Trial Operation And Testing
63
12.5.1 About Wiring Error Check
64
12.5.2 To Perform A Test Run
65
12.6 Starting Up The Outdoor Unit
65
14.1 Overview: Maintenance And Service
67
14.2 Maintenance Safety Precautions
67
14.3 Checklist For Yearly Maintenance Of The Outdoor Unit
67
14.4 About The Compressor
68
15.1 Overview: Troubleshooting
69
15.2 Precautions When Troubleshooting
69
15.3 Solving Problems Based On Symptoms
69
15.3.1 Symptom: Indoor Units Fall, Vibrate Or Make Noise
69
15.3.2 Symptom: The Unit Is Not Heating Or Cooling As Expected
70
15.3.3 Symptom: Water Leakage
70
15.3.4 Symptom: Electrical Leakage
70
15.3.5 Symptom: Priority Room Setting Does Not Function
70
15.3.6 Symptom: Unit Does Not Function Or Burn Damage
70
15.4 Solving Problems Based On Led Behaviour
71
15.4.1 Fault Diagnosis Using Led On Outdoor Unit Pcb
71
16.1 Overview: Disposal
73
16.2 To Pump Down
73
16.3 To Start And Stop Forced Cooling
74
17.1 Wiring Diagram
76
17.1.1 Unified Wiring Diagram Legend
76
17.2 Piping Diagram: Outdoor Unit
78
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