Daikin VRV Series User Manual

14
9.15 Hot air can be felt when the indoor
unit is stopped
• Severaldifferentindoorunitsarebeingrunon
thesamesystem.Whenanotherunitisrunning,
somerefrigerantwillstillowthroughtheunit.
10. Troubleshooting
Ifoneofthefollowingmalfunctionsoccur,takethe
measuresshownbelowandcontactyourdealer.
WARNING
Stopoperationandshutoffthepowerif
anythingunusualoccurs(burningsmellsetc.)
Leavingtheunitrunningundersuch
circumstancesmaycausebreakage,electric
shockorre.Contactyourdealer.
Thesystemmustberepairedbyaqualied
serviceperson:
• Ifasafetydevicesuchasafuse,abreakeror
anearthleakagebreakerfrequentlyactuatesor
theON/OFFswitchdoesnotproperlywork.
Measure:Tu r n offthemainpowerswitch.
• Ifwaterleaksfromtheunit.
Measure:Stoptheoperation.
• Theoperationswitchdoesnotworkwell.
Measure:Tu r n offthepower.
• Iftheuserinterfacedisplay“ ”indicates
theunitnumber,theoperationlampashesand
themalfunctioncodeappears.
Measure:Notifyyourinstallerandreportthe
malfunctioncode.
If the system does not properly operate except
for the above mentioned cases and none of the
above mentioned malfunctions is evident,
investigate the system according to the
following procedures. If it is impossible to x
the problem yourself after checking all the
above items, contact your dealer.
Let him know the symptoms, system name,
and model name (listed on the warranty card).
1 Ifthesystemdoesnotoperateatall:
• Checkifthereisnopowerfailure.
Waitunitpowerisrestored.Ifpowerfailure
occursduringoperation,thesystem
automaticallyrestartsimmediatelyafterthe
powersupplyisrecovered.
• Checkifnofusehasblownorbreakerhas
worked.Changethefuseorresetthe
breakerifnecessary.
Tu r n thepoweronwith
thebreakerswitchin
theoffposition.
Donotturnthepower
onwiththebreaker
switchinthetrip
position.
(Contactyourdealer.)
ON
OFF
Switch
Breaker
Tr i pposition
2 Ifthesystemgoesintofanonlyoperation,but
assoonasitgoesintocoolingoperation,the
systemstops:
• Checkifairinletoroutletofoutdooror
indoorunitisnotblockedbyobstacles.
Removeanyobstacleandmakeitwell-
ventilated.Checkiftheuserinterfacedisplay
shows
“ ” timetocleantheairlter).
Referto“theoperationmanualoftheindoor
unitandcleantheairlter”.
3 Thesystemoperatesbutcoolingorheatingis
insufcient:
• Checkifairinletoroutletofoutdooror
indoorunitisnotblockedbyobstacles.
• Removeanyobstacleandmakeitwell-
ventilated.
• Checkiftheairlterisnotclogged(referto
“Maintenance”intheindoorunitmanual).
• Checkthetemperaturesetting.
• Checkthefanspeedsettingonyouruser
interface.
• Checkforopendoorsorwindows.Shut
doorsandwindowstopreventwindfrom
comingin.
• Checkiftherearetoomanyoccupantsin
theroomduringcoolingoperation.Checkif
theheatsourceoftheroomisexcessive.
• Checkifdirectsunlightenterstheroom.
Usecurtainsorblinds.
• Checkiftheairowangleisproper.
Ifthecheckingallaboveitems,itisimpossibleto
xtheproblemyourself,contactyourinstallerand
statethesymptoms,thecompletemodelnameof
theairconditioner(withmanufacturingnumberif
possible)andtheinstallationdate(possiblylisted
onthewarrantycard).
01_EN_3P344160-11V.indd 14 08-Oct-20 9:22:57 AM

Daikin VRV Series Specifications

General

Type	Variable Refrigerant Volume (VRV)
Energy Efficiency	High
Refrigerant	R410A or R32
Inverter Technology	Yes
Control	Centralized
Application	Residential, Commercial
Indoor Unit Types	Ceiling Cassette, Ceiling Suspended, Wall Mounted, Floor Standing, Concealed Duct
Outdoor Unit Options	Multiple Units
Noise Level (Indoor Unit)	19 dB(A) to 45 dB(A)

Summary

Definitions

Meaning of Warnings and Symbols

Explains the meaning of DANGER, WARNING, CAUTION, NOTICE, and INFORMATION symbols used in the manual.

Meaning of Used Terms

Defines key terms like "Installation manual" and "Operation manual" for clarity.

Safety Precautions

Provides essential safety guidelines for operating and maintaining the air conditioner.

Introduction

General Information

Provides an overview of the VRV heat pump system and its indoor units.

System Layout

Illustrates the main components and connections within the VRV system.

Before Operation

User Interface

Operation Range

Operation Procedure

Cooling, Heating, Fan Only, Automatic Operation and Dry Operation

Explains how to select and adjust operation modes like cooling, heating, fan only, automatic, and dry.

Program Dry Operation

Details the program dry operation function for humidity reduction with minimal cooling.

Adjusting the Air Flow Direction

Guides on how to adjust the air flow direction using different user interfaces.

Setting the Master User Interface

Explains the procedure to designate a master user interface for system control.

Precautions for Group Control System or Two User Interface Control System

Provides precautions for group control and dual user interface systems.

Energy Saving and Optimum Operation

Maintenance

Maintenance After a Long Stop Period

Provides steps for maintenance before the start of the operating season.

Maintenance Before a Long Stop Period

Details maintenance tasks to perform before the end of the operating season.

Symptoms That Are Not Air Conditioner Troubles

The System Does Not Operate

Describes common scenarios where the system appears not to operate but is functioning normally.

Fan Operation Is Possible, but Cooling/Heating Do Not Work

Explains why cooling or heating may not start immediately after system power-on.

The Fan Strength Does Not Correspond to the Setting

Details reasons why fan strength might not match the selected setting.

The Fan Direction Does Not Correspond to the Setting

Explains when the fan direction indication may not match the actual air flow direction.

White Mist Comes Out of a Unit

Explains the phenomenon of white mist appearing from indoor or outdoor units.

The User Interface Display Reads "U4" or "U5" and Stops

Describes issues related to UI display "U4" or "U5" and temporary stops.

Noise of Air Conditioners

Describes various normal operational noises from indoor and outdoor units.

Dust Comes Out of the Unit

Explains why dust may be emitted from the unit, especially after first use.

The Units Can Give Off Odours

Explains how the unit may absorb and emit room or object odors.

The Outdoor Unit Fan Does Not Spin

Explains that the outdoor unit fan speed is controlled for optimal operation.

The Display Shows "88"

Describes the "88" display as normal initialization for the user interface.

The Compressor in the Outdoor Unit Does Not Stop

Explains why the compressor may not stop immediately after short heating operations.

The Inside of an Outdoor Unit is Warm Even When the Unit Has Stopped

Explains that the warm outdoor unit is due to the crankcase heater.

Does Not Cool Very Well

Suggests checking Program Dry Operation for cooling performance issues.

Hot Air Can Be Felt When the Indoor Unit Is Stopped

Explains that hot air may be felt when other units are running on the same system.

Troubleshooting

System Does Not Operate at All

Guides on checking power, fuses, and breakers for systems that do not operate.

System Goes into Fan Only Operation, then Stops

Troubleshooting steps for systems that stop after switching to cooling operation.

Cooling or Heating Is Insufficient

Provides checks for insufficient cooling or heating, including airflow and settings.

After-sales Service and Warranty

Warranty Period

Details the warranty card and its importance for repairs.

Recommendations for Maintenance and Inspection

Recommends professional maintenance and inspection contracts for optimal unit performance.

Recommended Inspection and Maintenance Cycles

Lists recommended inspection and maintenance cycles for various components.

Shortening of "Maintenance Cycle" and "Replacement Cycle"

Identifies situations where maintenance and replacement cycles may need to be shortened.

Malfunction Codes