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8 Troubleshooting

Installation and operation manual

13

RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452190-1D – 2020.10

▪ When the cool/heat changeover remote control switch is installed

and  the  display  shows 

  (change-over  under  centralized

control), this is because cool/heat changeover is controlled by the
cool/  heat  changeover  remote  control  switch.  Ask  your  dealer
where the remote control switch is installed.

8.2.3

Symptom: Fan operation is possible, but
cooling and heating do not work

Immediately  after  the  power  is  turned  on.  The  micro  computer  is
getting  ready  to  operate  and  is  performing  a  communication  check
with  all  indoor  units.  Please  wait  12  minutes  maximally  until  this
process is finished.

8.2.4

Symptom: The fan speed does not
correspond to the setting

The  fan  speed  does  not  change  even  if  the  fan  speed  adjustment
button  is  pressed.  During  heating  operation,  when  the  room
temperature  reaches  the  set  temperature,  the  outdoor  unit  goes  off
and the indoor unit changes to whisper fan speed. This is to prevent
cold  air  blowing  directly  on  occupants  of  the  room.  The  fan  speed
will  not  change  even  when  another  indoor  unit  is  in  heating
operation, if the button is pressed.

8.2.5

Symptom: The fan direction does not
correspond to the setting

The  fan  direction  does  not  correspond  with  the  user  interface
display. The fan direction does not swing. This is because the unit is
being controlled by the micro computer.

8.2.6

Symptom: White mist comes out of a unit
(Indoor unit)

▪ When humidity is high during cooling operation. If the interior of an

indoor unit is extremely contaminated, the temperature distribution
inside  a  room  becomes  uneven.  It  is  necessary  to  clean  the
interior  of  the  indoor  unit.  Ask  your  dealer  for  details  on  cleaning
the unit. This operation requires a qualified service person.

▪ Immediately  after  the  cooling  operation  stops  and  if  the  room

temperature  and  humidity  are  low.  This  is  because  warm
refrigerant  gas  flows  back  into  the  indoor  unit  and  generates
steam.

8.2.7

Symptom: White mist comes out of a unit
(Indoor unit, outdoor unit)

When the system is changed over to heating operation after defrost
operation.  Moisture  generated  by  defrost  becomes  steam  and  is
exhausted.

8.2.8

Symptom: The user interface reads "U4"
or "U5" and stops, but then restarts after a
few minutes

This is because the user interface is intercepting noise from electric
appliances  other  than  the  air  conditioner.  The  noise  prevents
communication  between  the  units,  causing  them  to  stop.  Operation
automatically restarts when the noise ceases.

8.2.9

Symptom: Noise of air conditioners
(Indoor unit)

▪ A  "zeen"  sound  is  heard  immediately  after  the  power  supply  is

turned  on.  The  electronic  expansion  valve  inside  an  indoor  unit
starts  working  and  makes  the  noise.  Its  volume  will  reduce  in
about one minute.

▪ A  continuous  low  "shah"  sound  is  heard  when  the  system  is  in

cooling  operation  or  at  a  stop.  When  the  drain  pump  (optional
accessories) is in operation, this noise is heard.

▪ A  "pishi-pishi"  squeaking  sound  is  heard  when  the  system  stops

after heating operation. Expansion and contraction of plastic parts
caused by temperature change make this noise.

▪ A low "sah", "choro-choro" sound is heard while the indoor unit is

stopped.  When  another  indoor  unit  is  in  operation,  this  noise  is
heard. In order to prevent oil and refrigerant from remaining in the
system, a small amount of refrigerant is kept flowing.

8.2.10

Symptom: Noise of air conditioners
(Indoor unit, outdoor unit)

▪ A  continuous  low  hissing  sound  is  heard  when  the  system  is  in

cooling  or  defrost  operation.  This  is  the  sound  of  refrigerant  gas
flowing through both indoor and outdoor units.

▪ A  hissing  sound  which  is  heard  at  the  start  or  immediately  after

stopping  operation  or  defrost  operation.  This  is  the  noise  of
refrigerant caused by flow stop or flow change.

8.2.11

Symptom: Noise of air conditioners
(Outdoor unit)

When the tone of operating noise changes. This noise is caused by
the change of frequency.

8.2.12

Symptom: Dust comes out of the unit

When  the  unit  is  used  for  the  first  time  in  a  long  time.  This  is
because dust has gotten into the unit.

8.2.13

Symptom: The units can give off odours

The  unit  can  absorb  the  smell  of  rooms,  furniture,  cigarettes,  etc.,
and then emit it again.

8.2.14

Symptom: The outdoor unit fan does not
spin

During  operation.  The  speed  of  the  fan  is  controlled  in  order  to
optimise product operation.

8.2.15

Symptom: The display shows "88"

This  is  the  case  immediately  after  the  main  power  supply  switch  is
turned  on  and  means  that  the  user  interface  is  in  normal  condition.
This continues for 1 minute.

8.2.16

Symptom: The compressor in the outdoor
unit does not stop after a short heating
operation

This is to prevent refrigerant from remaining in the compressor. The
unit will stop after 5 to 10 minutes.

8.2.17

Symptom: The inside of an outdoor unit is
warm even when the unit has stopped

This is because the crankcase heater is warming the compressor so
that the compressor can start smoothly.

8.2.18

Symptom: 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 flow through
the unit.

Содержание VRV IV RWEYQ-T9

Страница 1: ...lation and operation manual VRV IV water cooled system air conditioner English Installation and operation manual VRV IV water cooled system air conditioner RWEYQ8T9Y1B RWEYQ10T9Y1B RWEYQ12T9Y1B RWEYQ1...

Страница 2: ...8 19 20 21 22 23 24 25 Directivelor cu amendamentele respective Direktive z vsemi spremembami Direktiivid koos muudatustega Direktyvose su papildymais Direkt v s un to papildin jumos Smernice v platno...

Страница 3: ...S vastaava kyll stysl mp tila M C Kylm aine N Varmuuspainelaitteen asetus P bar Valmistusnumero ja valmistusvuosi katso mallin nimikilpi Maxim ln p pustn tlak PS K bar Minim ln maxim ln p pustn teplot...

Страница 4: ...s not spin 13 8 2 15 Symptom The display shows 88 13 8 2 16 Symptom The compressor in the outdoor unit does not stop after a short heating operation 13 8 2 17 Symptom The inside of an outdoor unit is...

Страница 5: ...r reference guide Preparation of the installation reference data Detailed step by step instructions and background information for basic and advanced usage Format Digital files on http www daikineurop...

Страница 6: ...carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief CAUTION Do NOT perform the test operation while working on the indoor units When pe...

Страница 7: ...ation CAUTION NEVER touch the internal parts of the controller Do NOT remove the front panel Some parts inside are dangerous to touch and appliance problems may happen For checking and adjusting the i...

Страница 8: ...ices ventilate the room and contact the dealer where you purchased the unit Do not use the system until a service person confirms that the portion where the refrigerant leaks is repaired 4 About the s...

Страница 9: ...ch 6 hours before operation 6 2 2 About cooling heating fan only and automatic operation Changeover cannot be made with a user interface whose display shows change over under centralised control refer...

Страница 10: ...humidity in your room with minimal temperature decrease minimal room cooling The micro computer automatically determines temperature and fan speed cannot be set by the user interface The system does...

Страница 11: ...ing for damage If damaged the unit may fall and result in injury NOTICE Do NOT wipe the controller operation panel with benzine thinner chemical dust cloth etc The panel may get discoloured or the coa...

Страница 12: ...unit manual Malfunction Measure The system operates but cooling or heating is insufficient Check if air inlet or outlet of outdoor or indoor unit is not blocked by obstacles Remove any obstacles and m...

Страница 13: ...stop Operation automatically restarts when the noise ceases 8 2 9 Symptom Noise of air conditioners Indoor unit A zeen sound is heard immediately after the power supply is turned on The electronic ex...

Страница 14: ...b Installation manual and operation manual c Additional refrigerant charge label d Installation information sticker e Fluorinated greenhouse gases label f Multilingual fluorinated greenhouse gases la...

Страница 15: ...ratures from 21 C DB to 32 C DB or 14 C WB to 25 C WB The ambient temperature around the unit should be above 0 C DB and below 40 C DB Relative humidity around the unit should be below 80 The water te...

Страница 16: ...l the water piping and field wiring front plate B has to be removed 13 2 2 To open the electrical component box of the outdoor unit NOTICE Do NOT apply excessive force when opening the electronic comp...

Страница 17: ...ery Determine the proper size using the following tables and reference figure only for indication In case of heat pump system A B B B C D F G E x y b a 3 1 2 4 5 1 2 VRV DX indoor unit 3 Branch select...

Страница 18: ...ed on the total capacity of the connected indoor units only in case RA DX indoor units are connected Total capacity index of connected indoor units Piping outer diameter size mm Gas pipe Liquid pipe 2...

Страница 19: ...ll the following restriction conditions A B C a c b A B C a To indoor units b Outdoor unit multi connecting piping kit first branch c Outdoor unit multi connecting piping kit second branch 14 2 Prepar...

Страница 20: ...on the piping between this shut off valve and the outdoor unit for cleaning by chemicals For cleaning and water draining of the outdoor unit long period of non use or during non use in winter install...

Страница 21: ...the design flow rate calculated by the hydronic engineer when designing the building system Correct valve selection is done when following conditions are met B C AND E A D For further selection requir...

Страница 22: ...ay enter the machine 14 3 6 Using the stop valve and service port To handle the stop valve Take the following guidelines into account Make sure to keep the appropriate stop valves open during operatio...

Страница 23: ...nect the vacuuming recovery unit through a manifold to the service port of all stop valves p p R410A N2 b c e a f g h d A C 1 D B a Pressure reducing valve b Nitrogen c Weighing scales d Refrigerant R...

Страница 24: ...ant piping for example water may have entered the piping first carry out the vacuum drying procedure below until all moisture has been removed All piping inside the unit has been factory tested for le...

Страница 25: ...for 1 hour the system may contain too much moisture In that case break the vacuum by pressurising with nitrogen gas to a gauge pressure of 0 05 MPa 0 5 bar and repeat steps 1 to 3 until all moisture h...

Страница 26: ...additional 0 5 kg of refrigerant per outdoor unit In case of heat recovery system Formula R X1 22 2 0 37 X2 19 1 0 26 X3 15 9 0 18 X4 12 7 0 12 X5 9 5 0 059 X6 6 4 0 022 1 04 A C R Additional refriger...

Страница 27: ...ks to each outdoor unit NOTICE The refrigerant charging port is connected to the piping inside the unit The unit s internal piping is already factory charged with refrigerant so be careful when connec...

Страница 28: ...flow rate is correct If not stop the pump immediately and carry out troubleshooting 14 6 4 To insulate the water piping The outdoor water piping MUST be insulated to prevent condensation during heatin...

Страница 29: ...g In case of heat recovery system B i a b f c f e g d c h j j i a Field power supply with earth leakage protector b Main switch c Earth connection d Outdoor unit e Indoor unit f User interface g BS un...

Страница 30: ...es using finishing tape as shown in figure below b a f c d f e f a Liquid pipe b Gas pipe c Finishing tape d High pressure low pressure gas pipe e Transmission wiring F1 F2 f Insulator 15 6 To route a...

Страница 31: ...e closed valve Select a flow switch contact of at least 15 V DC 1 mA Connect the flow switch to X2M terminals 5 and 6 In case of a multi outdoor unit system install one or more flow switches depending...

Страница 32: ...ng the current field setting value is possible In general normal operation can be resumed without special intervention after changing field settings Some field settings are used for special operation...

Страница 33: ...atus of the unit What How Changing and accessing the setting in mode 1 Once mode 1 is selected push BS1 one time you can select the wanted setting It is done by pushing BS2 Accessing the selected sett...

Страница 34: ...m 3 Each unit has a pump valve pump is OFF when slave unit does not operate Minimum water flow rate limit control To change the minimum water flow rate limit of the variable flow system change the set...

Страница 35: ...tion Check that the unit is properly installed to avoid abnormal noises and vibrations when starting up the unit Field wiring Be sure that the field wiring has been carried out according to the instru...

Страница 36: ...s 17 4 To perform a test run 1 Close all front panels in order to not let it be the cause of misjudgement except the electrical component box inspection opening service cover 2 Make sure all field set...

Страница 37: ...site publicly accessible The full set of latest technical data is available on the Daikin Business Portal authentication required 19 1 Service space Outdoor unit Make sure the space around the unit is...

Страница 38: ...pressor Double tube heat exchanger Liquid receiver Thermistor 20 Disposal NOTICE Do NOT try to dismantle the system yourself dismantling of the system treatment of the refrigerant oil and other parts...

Страница 39: ......

Страница 40: ...4P452190 1D 2020 10 Copyright 2017 Daikin 4P452190 1 D 0000000 Verantwortung f r Energie und Umwelt...

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