Name: Daikin 3MXM40A2V1B9
Brand: Daikin
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12 | Commissioning

Installer reference guide

2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9

R32 Split series

4P600463-7G – 2022.09

12.6 Starting up the outdoor unit

See the indoor unit installation manual for configuration and commissioning of the

system.

Table of Contents2
About the Documentation4
About this Document4
Meaning of Warnings and Symbols5
General Safety Precautions7
For the Installer7
General7
Installation Site8
Refrigerant - in Case of R410A or R3211
Electrical12
Specific Installer Safety Instructions15
About the Box21
Outdoor Unit21
To Unpack the Outdoor Unit21
To Handle the Outdoor Unit21
To Remove the Accessories from the Outdoor Unit22
About the Unit23
Identification23
Identification Label: Outdoor Unit23
Unit Installation24
Preparing the Installation Site24
Installation Site Requirements of the Outdoor Unit25
Additional Installation Site Requirements of the Outdoor Unit in Cold Climates27
Opening the Unit28
About Opening the Unit28
To Open the Outdoor Unit28
Mounting the Outdoor Unit28
About Mounting the Outdoor Unit28
Precautions When Mounting the Outdoor Unit29
To Provide the Installation Structure29
To Install the Outdoor Unit30
To Provide Drainage30
To Prevent the Outdoor Unit from Falling over31
Piping Installation32
Preparing Refrigerant Piping32
Refrigerant Piping Requirements32
Refrigerant Piping Insulation33
Refrigerant Piping Length and Height Difference34
Connecting the Refrigerant Piping35
About Connecting the Refrigerant Piping35
Precautions When Connecting the Refrigerant Piping35
Guidelines When Connecting the Refrigerant Piping36
Pipe Bending Guidelines37
To Flare the Pipe End37
Connections between Outdoor and Indoor Unit Using Reducers38
Using the Stop Valve and Service Port39
To Connect the Refrigerant Piping to the Outdoor Unit41
Checking the Refrigerant Piping41
About Checking the Refrigerant Piping41
Precautions When Checking the Refrigerant Piping42
To Check for Leaks42
To Perform Vacuum Drying43
Charging Refrigerant44
About Charging Refrigerant44
About the Refrigerant45
Precautions When Charging Refrigerant46
To Determine the Additional Refrigerant Amount46
To Determine the Complete Recharge Amount47
To Charge Additional Refrigerant47
To Fix the Fluorinated Greenhouse Gases Label47
To Check for Refrigerant Leaks after Charging48
Electrical Installation49
About Connecting the Electrical Wiring49
Precautions When Connecting the Electrical Wiring49
Guidelines When Connecting the Electrical Wiring51
Specifications of Standard Wiring Components53
To Connect the Electrical Wiring to the Outdoor Unit53
Finishing the Outdoor Unit Installation56
To Finish the Outdoor Unit Installation56
Closing the Unit56
To Close the Outdoor Unit56
Configuration57
About Standby Electricity Saving Function57
To Turn on Standby Electricity Saving Function57
About Priority Room Function58
To Set the Priority Room Function58
About Night Quiet Mode58
To Turn on the Night Quiet Mode58
About Heat Mode Lock59
To Turn on Heat Mode Lock59
About Cool Mode Lock59
To Turn on Cool Mode Lock59
Commissioning61
Overview: Commissioning61
Precautions When Commissioning61
Checklist before Commissioning62
Checklist During Commissioning62
Trial Operation and Testing63
About Wiring Error Check63
To Perform a Test Run64
Starting up the Outdoor Unit65
Hand-Over to the User66
Maintenance and Service67
Overview: Maintenance and Service67
Maintenance Safety Precautions67
Checklist for Yearly Maintenance of the Outdoor Unit68
About the Compressor68
Troubleshooting69
Overview: Troubleshooting69
Precautions When Troubleshooting69
Solving Problems Based on Symptoms69
Symptom: Indoor Units Fall, Vibrate or Make Noise69
Symptom: the Unit Is NOT Heating or Cooling as Expected70
Symptom: Water Leakage70
Symptom: Electrical Leakage70
Symptom: Priority Room Setting Does NOT Function70
Symptom: Unit Does NOT Function or Burn Damage70
Solving Problems Based on LED Behaviour71
Fault Diagnosis Using LED on Outdoor Unit PCB71
Disposal73
Overview: Disposal73
To Pump down73
To Start and Stop Forced Cooling74
Technical Data76
Wiring Diagram76
Unified Wiring Diagram Legend76
Piping Diagram79
Piping Diagram: Outdoor Unit79
Glossary83

Brand	Daikin
Model	3MXM40A2V1B9
Category	Air Conditioner
Language	English

Daikin 3MXM40A2V1B9 User Manual

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