Daikin Multi+ R32 Split Series

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15 | Troubleshooting

Installer reference guide

4MWXM-A9

R32 Split series

4P708645-1 – 2022.09

(a)

Diagnosis may not apply to some cases. For more details, refer to the service manual.

Main Page

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 Box20
Outdoor Unit20
To Unpack the Outdoor Unit20
To Handle the Outdoor Unit20
To Remove the Accessories from the Outdoor Unit21
About the Unit22
Identification22
Identification Label: Outdoor Unit22
Unit Installation23
Preparing the Installation Site23
Installation Site Requirements of the Outdoor Unit24
Additional Installation Site Requirements of the Outdoor Unit in Cold Climates26
Opening the Unit27
About Opening the Unit27
To Open the Outdoor Unit27
Mounting the Outdoor Unit28
About Mounting the Outdoor Unit28
Precautions When Mounting the Outdoor Unit28
To Provide the Installation Structure28
To Install the Outdoor Unit29
To Provide Drainage29
To Prevent the Outdoor Unit from Falling over30
Piping Installation32
Preparing Refrigerant Piping32
Refrigerant Piping Requirements32
Refrigerant Piping Insulation33
Refrigerant Piping Length and Height Difference33
Connecting the Refrigerant Piping34
About Connecting the Refrigerant Piping34
Precautions When Connecting the Refrigerant Piping34
Guidelines When Connecting the Refrigerant Piping36
Pipe Bending Guidelines36
To Flare the Pipe End36
Connections between Outdoor and Indoor Unit Using Reducers37
Using the Stop Valve and Service Port38
To Connect the Refrigerant Piping to the Outdoor Unit40
Checking the Refrigerant Piping40
About Checking the Refrigerant Piping40
Precautions When Checking the Refrigerant Piping41
To Check for Leaks41
To Perform Vacuum Drying41
Charging Refrigerant43
About Charging Refrigerant43
About the Refrigerant44
Precautions When Charging Refrigerant45
To Determine the Additional Refrigerant Amount45
To Determine the Complete Recharge Amount45
To Charge Additional Refrigerant45
To Fix the Fluorinated Greenhouse Gases Label46
To Check for Refrigerant Leaks after Charging46
Electrical Installation48
About Connecting the Electrical Wiring48
Precautions When Connecting the Electrical Wiring48
Guidelines When Connecting the Electrical Wiring50
Specifications of Standard Wiring Components52
To Connect the Electrical Wiring to the Outdoor Unit52
Finishing the Outdoor Unit Installation54
To Finish the Outdoor Unit Installation54
To Close the Outdoor Unit54
Configuration55
About Standby Electricity Saving Function55
To Turn on Standby Electricity Saving Function55
About Priority Room Function56
To Set the Priority Room Function56
About Night Quiet Mode56
To Turn on the Night Quiet Mode56
About Heat Mode Lock57
To Turn on Heat Mode Lock57
Commissioning58
Overview: Commissioning58
Precautions When Commissioning58
Checklist before Commissioning59
Checklist During Commissioning59
Trial Operation and Testing59
About Wiring Error Check60
To Perform a Test Run61
Starting up the Outdoor Unit62
Hand-Over to the User63
Maintenance and Service64
Overview: Maintenance and Service64
Maintenance Safety Precautions64
Checklist for Yearly Maintenance of the Outdoor Unit65
About the Compressor65
Troubleshooting66
Overview: Troubleshooting66
Precautions When Troubleshooting66
Solving Problems Based on Symptoms66
Symptom: Indoor Units Fall, Vibrate or Make Noise66
Symptom: the Unit Is NOT Heating or Cooling as Expected67
Symptom: Water Leakage67
Symptom: Electrical Leakage67
Symptom: Priority Room Setting Does NOT Function67
Symptom: Unit Does NOT Function or Burn Damage67
Solving Problems Based on LED Behaviour67
Fault Diagnosis Using LED on Outdoor Unit PCB67
Disposal70
Overview: Disposal70
To Pump down70
To Start and Stop Forced Cooling71
Technical Data72
Wiring Diagram72
Unified Wiring Diagram Legend72
Piping Diagram: Outdoor Unit74
Glossary76

Daikin Multi+ R32 Split Series - Page 69

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