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 Outdoor Unit
21
4.1.1 To Unpack The Outdoor Unit
21
4.1.2 To Handle The Outdoor Unit
21
4.1.3 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
31
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
34
7.2 Connecting The Refrigerant Piping
35
7.2.1 About Connecting The Refrigerant Piping
35
7.2.2 Precautions When Connecting The Refrigerant Piping
35
7.2.3 Guidelines When Connecting The Refrigerant Piping
37
7.2.4 Pipe Bending Guidelines
37
7.2.5 To Flare The Pipe End
37
7.2.6 Connections Between Outdoor And Indoor Unit Using Reducers
38
7.2.7 Using The Stop Valve And Service Port
41
7.2.8 To Connect The Refrigerant Piping To The Outdoor Unit
42
7.3 Checking The Refrigerant Piping
43
7.3.1 About Checking The Refrigerant Piping
43
7.3.2 Precautions When Checking The Refrigerant Piping
43
7.3.3 To Check For Leaks
44
7.3.4 To Perform Vacuum Drying
44
8.1 About Charging Refrigerant
46
8.2 About The Refrigerant
47
8.3 Precautions When Charging Refrigerant
48
8.4 To Determine The Additional Refrigerant Amount
48
8.5 To Determine The Complete Recharge Amount
49
8.6 To Charge Additional Refrigerant
49
8.7 To Fix The Fluorinated Greenhouse Gases Label
49
8.8 To Check For Refrigerant Leaks After Charging
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
55
9.2 To Connect The Electrical Wiring To The Outdoor Unit
56
10.1 To Finish The Outdoor Unit Installation
58
10.2 Closing The Unit
58
10.2.1 To Close The Outdoor Unit
58
11.1 About Standby Electricity Saving Function
59
11.1.1 To Turn On Standby Electricity Saving Function
59
11.2 About Priority Room Function
60
11.2.1 To Set The Priority Room Function
60
11.3 About Night Quiet Mode
60
11.3.1 To Turn On The Night Quiet Mode
60
11.4 About Heat Mode Lock
61
11.4.1 To Turn On Heat Mode Lock
61
11.5 About Cool Mode Lock
61
11.5.1 To Turn On Cool Mode Lock
61
12.1 Overview: Commissioning
63
12.2 Precautions When Commissioning
63
12.3 Checklist Before Commissioning
64
12.4 Checklist During Commissioning
64
12.5 Trial Operation And Testing
65
12.5.1 About Wiring Error Check
65
12.5.2 To Perform A Test Run
66
12.6 Starting Up The Outdoor Unit
67
14.1 Overview: Maintenance And Service
69
14.2 Maintenance Safety Precautions
69
14.3 Checklist For Yearly Maintenance Of The Outdoor Unit
70
14.4 About The Compressor
70
15.1 Overview: Troubleshooting
71
15.2 Precautions When Troubleshooting
71
15.3 Solving Problems Based On Symptoms
71
15.3.1 Symptom: Indoor Units Fall, Vibrate Or Make Noise
71
15.3.2 Symptom: The Unit Is Not Heating Or Cooling As Expected
72
15.3.3 Symptom: Water Leakage
72
15.3.4 Symptom: Electrical Leakage
72
15.3.5 Symptom: Priority Room Setting Does Not Function
72
15.3.6 Symptom: Unit Does Not Function Or Burn Damage
72
15.4 Solving Problems Based On Led Behaviour
73
15.4.1 Fault Diagnosis Using Led On Outdoor Unit Pcb
73
16.1 Overview: Disposal
75
16.2 To Pump Down
75
16.3 To Start And Stop Forced Cooling
76
17.1 Wiring Diagram
78
17.1.1 Unified Wiring Diagram Legend
78
17.2 Piping Diagram
81
17.2.1 Piping Diagram: Outdoor Unit
81
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