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5MXM-A9
Daikin 5MXM-A9 User Manual
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Troubleshooting
Installer reference guide
72
2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
4P600463-7G – 2022.09
Green LED-A
Diagnosis
Turn the power OFF and back ON, and check the LED
within approximately 3 minutes. If the LED is ON again,
the outdoor unit PCB is faulty.
Power supply fault.
(a)
(a)
Diagnosis may not apply to some cases. For more details, refer to the service manual.
71
73
Table of Contents
Table of Contents
2
About the Documentation
4
About this Document
4
Meaning of Warnings and Symbols
5
General Safety Precautions
7
For the Installer
7
General
7
Installation Site
8
Refrigerant - in Case of R410A or R32
11
Electrical
12
Specific Installer Safety Instructions
15
About the Box
21
Outdoor Unit
21
To Unpack the Outdoor Unit
21
To Handle the Outdoor Unit
21
To Remove the Accessories from the Outdoor Unit
22
About the Unit
23
Identification
23
Identification Label: Outdoor Unit
23
Unit Installation
24
Preparing the Installation Site
24
Installation Site Requirements of the Outdoor Unit
25
Additional Installation Site Requirements of the Outdoor Unit in Cold Climates
27
Opening the Unit
28
About Opening the Unit
28
To Open the Outdoor Unit
28
Mounting the Outdoor Unit
28
About Mounting the Outdoor Unit
28
Precautions When Mounting the Outdoor Unit
29
To Provide the Installation Structure
29
To Install the Outdoor Unit
30
To Provide Drainage
30
To Prevent the Outdoor Unit from Falling over
31
Piping Installation
32
Preparing Refrigerant Piping
32
Refrigerant Piping Requirements
32
Refrigerant Piping Insulation
33
Refrigerant Piping Length and Height Difference
34
Connecting the Refrigerant Piping
35
About Connecting the Refrigerant Piping
35
Precautions When Connecting the Refrigerant Piping
35
Guidelines When Connecting the Refrigerant Piping
36
Pipe Bending Guidelines
37
To Flare the Pipe End
37
Connections between Outdoor and Indoor Unit Using Reducers
38
Using the Stop Valve and Service Port
39
To Connect the Refrigerant Piping to the Outdoor Unit
41
Checking the Refrigerant Piping
41
About Checking the Refrigerant Piping
41
Precautions When Checking the Refrigerant Piping
42
To Check for Leaks
42
To Perform Vacuum Drying
43
Charging Refrigerant
44
About Charging Refrigerant
44
About the Refrigerant
45
Precautions When Charging Refrigerant
46
To Determine the Additional Refrigerant Amount
46
To Determine the Complete Recharge Amount
47
To Charge Additional Refrigerant
47
To Fix the Fluorinated Greenhouse Gases Label
47
To Check for Refrigerant Leaks after Charging
48
Electrical Installation
49
About Connecting the Electrical Wiring
49
Precautions When Connecting the Electrical Wiring
49
Guidelines When Connecting the Electrical Wiring
51
Specifications of Standard Wiring Components
53
To Connect the Electrical Wiring to the Outdoor Unit
53
Finishing the Outdoor Unit Installation
56
To Finish the Outdoor Unit Installation
56
Closing the Unit
56
To Close the Outdoor Unit
56
Configuration
57
About Standby Electricity Saving Function
57
To Turn on Standby Electricity Saving Function
57
About Priority Room Function
58
To Set the Priority Room Function
58
About Night Quiet Mode
58
To Turn on the Night Quiet Mode
58
About Heat Mode Lock
59
To Turn on Heat Mode Lock
59
About Cool Mode Lock
59
To Turn on Cool Mode Lock
59
Commissioning
61
Overview: Commissioning
61
Precautions When Commissioning
61
Checklist before Commissioning
62
Checklist During Commissioning
62
Trial Operation and Testing
63
About Wiring Error Check
63
To Perform a Test Run
64
Starting up the Outdoor Unit
65
Hand-Over to the User
66
Maintenance and Service
67
Overview: Maintenance and Service
67
Maintenance Safety Precautions
67
Checklist for Yearly Maintenance of the Outdoor Unit
68
About the Compressor
68
Troubleshooting
69
Overview: Troubleshooting
69
Precautions When Troubleshooting
69
Solving Problems Based on Symptoms
69
Symptom: Indoor Units Fall, Vibrate or Make Noise
69
Symptom: the Unit Is NOT Heating or Cooling as Expected
70
Symptom: Water Leakage
70
Symptom: Electrical Leakage
70
Symptom: Priority Room Setting Does NOT Function
70
Symptom: Unit Does NOT Function or Burn Damage
70
Solving Problems Based on LED Behaviour
71
Fault Diagnosis Using LED on Outdoor Unit PCB
71
Disposal
73
Overview: Disposal
73
To Pump down
73
To Start and Stop Forced Cooling
74
Technical Data
76
Wiring Diagram
76
Unified Wiring Diagram Legend
76
Piping Diagram
79
Piping Diagram: Outdoor Unit
79
Glossary
83
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Daikin 5MXM-A9 Specifications
General
Brand
Daikin
Model
5MXM-A9
Category
Air Conditioner
Language
English
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