background image

11 Troubleshooting

Installer and user reference guide

37

RXYSCQ4~6TMV1B
VRV IV-S system air conditioner
4P404224-1C – 2019.07

10.4

About service mode operation

Refrigerant  recovery  operation/vacuuming  operation  is  possible  by
applying  setting  [2‑21].  Refer  to 

"7.2  Making  field  settings"  on

page 27

 for details how to set mode 2.

When vacuuming/recovery mode is used, check very carefully what
should  be  vacuumed/recovered  before  starting.  See  installation
manual of the indoor unit for more information about vacuuming and
recovery.

10.4.1

To use vacuum mode

1

When  the  unit  is  at  standstill,  activate  setting  [2‑21]  to  start
vacuuming mode.

Result: 

When confirmed, the indoor and outdoor unit expansion

valves  will  fully  open.  At  that  moment  H1P  lights  and  the  user
interface  of  all  indoor  units  indicate  TEST  (test  operation)  and

 (external control) and the operation will be prohibited.

2

Evacuate the system with a vacuum pump.

3

Press BS1 to stop vacuuming mode.

10.4.2

To recover refrigerant

This  should  be  done  by  a  refrigerant  reclaimer.  Follow  the  same
procedure as for vacuuming method.

DANGER: RISK OF EXPLOSION

Pump  down  –  Refrigerant  leakage.

  If  you  want  to  pump

down  the  system,  and  there  is  a  leak  in  the  refrigerant
circuit:

▪ Do NOT use the unit's automatic pump down function,

with  which  you  can  collect  all  refrigerant  from  the
system  into  the  outdoor  unit. 

Possible  consequence:

Self-combustion  and  explosion  of  the  compressor
because of air going into the operating compressor.

▪ Use  a  separate  recovery  system  so  that  the  unit's

compressor does NOT have to operate.

NOTICE

Make  sure  to  NOT  recover  any  oil  while  recovering
refrigerant. 

Example: 

By using an oil separator.

11

Troubleshooting

11.1

Overview: Troubleshooting

Before troubleshooting

Carry  out  a  thorough  visual  inspection  of  the  unit  and  look  for
obvious defects such as loose connections or defective wiring.

11.2

Precautions when troubleshooting

WARNING

▪ When  carrying  out  an  inspection  on  the  switch  box  of

the  unit,  ALWAYS  make  sure  that  the  unit  is
disconnected  from  the  mains.  Turn  off  the  respective
circuit breaker.

▪ When a safety device was activated, stop the unit and

find  out  why  the  safety  device  was  activated  before
resetting  it.  NEVER  shunt  safety  devices  or  change
their  values  to  a  value  other  than  the  factory  default
setting.  If  you  are  unable  to  find  the  cause  of  the
problem, call your dealer.

DANGER: RISK OF ELECTROCUTION

WARNING

Prevent hazards due to inadvertent resetting of the thermal
cut-out:  power  to  this  appliance  MUST  NOT  be  supplied
through  an  external  switching  device,  such  as  a  timer,  or
connected to a circuit that is regularly turned ON and OFF
by the utility.

DANGER: RISK OF BURNING

11.3

Solving problems based on error
codes

In  case  of  a  displayed  malfunction  code,  perform  correcting  actions
as explained in the malfunction code table.

After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.

INFORMATION

If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.

INFORMATION

If a malfunction occurs, the error code is displayed on the
outdoor unit's 7‑segments display and on the user interface
of the indoor unit.

11.3.1

Error codes: Overview

Main code

Cause

Solution

▪ The stop valve of an outdoor unit is left closed.

▪ Refrigerant overcharge

▪ Open the stop valve on both the gas and liquid side.

▪ Recalculate  the  required  amount  of  refrigerant  from  the

piping  length  and  correct  the  refrigerant  charge  level  by
recovering  any  excessive  refrigerant  with  a  refrigerant
recovery machine.

▪ The stop valve of an outdoor unit is left closed.

▪ Insufficient refrigerant

▪ Open the stop valve on both the gas and liquid side.

▪ Check  if  the  additional  refrigerant  charge  has  been

finished  correctly.  Recalculate  the  required  amount  of
refrigerant  from  the  piping  length  and  add  an  adequate
amount of refrigerant.

Summary of Contents for RXYSCQ6TMV1B

Page 1: ...Installer and user reference guide VRV IV S system air conditioner English Installer and user reference guide VRV IV S system air conditioner RXYSCQ4TMV1B RXYSCQ5TMV1B RXYSCQ6TMV1B...

Page 2: ...5 To flare the pipe end 17 6 4 6 To braze the pipe end 18 6 4 7 Using the stop valve and service port 18 6 4 8 To connect the refrigerant piping to the outdoor unit 19 6 4 9 To connect the refrigerant...

Page 3: ...om The fan speed does not correspond to the setting 50 20 2 4 Symptom The fan direction does not correspond to the setting 50 20 2 5 Symptom White mist comes out of a unit Indoor unit 50 20 2 6 Sympto...

Page 4: ...symbols are Pb lead 0 004 Waste batteries must be treated at a specialized treatment facility for reuse By ensuring waste batteries are disposed of correctly you will help to prevent potential negativ...

Page 5: ...consequence Self combustion and explosion of the compressor because of air going into the operating compressor Use a separate recovery system so that the unit s compressor does NOT have to operate WA...

Page 6: ...arth leakage protector Failure to do so may cause electric shock or fire When installing the earth leakage protector make sure it is compatible with the inverter resistant to high frequency electric n...

Page 7: ...ngineering data A subset of the latest technical data is available on the regional Daikin website publicly accessible The full set of latest technical data is available on the Daikin Business Portal a...

Page 8: ...mpact S series Q Refrigerant R410A 4 6 Capacity class TM VRV IV series V1 Power supply B European market Minor model change indication 4 3 About the outdoor unit This installation manual concerns the...

Page 9: ...tion and power consumption limitation operation The external control adapter has to be installed in the indoor unit PC configurator cable EKPCCAB You can make several commissioning field settings thro...

Page 10: ...vessels Where acidic or alkaline vapour is present Seaside installation Make sure the outdoor unit is NOT directly exposed to sea winds This is to prevent corrosion caused by high levels of salt in t...

Page 11: ...of the refrigerant gas in 1 m3 volume of the occupied space Compliance to the local applicable regulations and standards for the maximum allowable concentration level is required According to the appr...

Page 12: ...3 4 Half hard 1 2H 0 80 mm a Depending on the applicable legislation and the unit s maximum working pressure see PS High on the unit name plate larger piping thickness might be required 5 3 3 To selec...

Page 13: ...on page 12 Refnet joint at first branch counting from outdoor unit When using refnet joints at the first branch counted from the outdoor unit side choose from the following table in accordance with t...

Page 14: ...Limit 30 m 30 m Outdoor lower than indoor Maximum height difference indoor indoor Examples H2 Limit 15 m 15 m Maximum height difference outdoor BP Example 2 H3 Limit N A 30 m Maximum height differenc...

Page 15: ...units Connecting the refrigerant piping Checking the refrigerant piping Charging refrigerant Connecting the electrical wiring Finishing the outdoor installation Finishing the indoor installation INFO...

Page 16: ...he unit to provide a free space of more than 150 mm under the outdoor unit 150 mm Drain holes dimensions in mm 52 102 118 59 62 216 130 20 98 21 89 32 a a Drain holes 6 3 6 To prevent the outdoor unit...

Page 17: ...g guidelines into account when connecting pipes Coat the flare inner surface with ether oil or ester oil when connecting a flare nut Tighten 3 or 4 turns by hand before tightening firmly ALWAYS use 2...

Page 18: ...e corrosion or in particular if the flux contains fluorine it will deteriorate the refrigerant oil Always protect the surrounding surfaces e g insulation foam from heat when brazing 6 4 7 Using the st...

Page 19: ...flat head screwdriver and a hammer Optionally cut out the slits b with a metal saw NOTICE Precautions when making knockout holes Avoid damaging the casing and underlying piping After making the knock...

Page 20: ...l the outdoor unit has finished the initialisation Leak test and vacuum drying Checking the refrigerant piping involves Checking for any leakages in the refrigerant piping Performing vacuum drying to...

Page 21: ...ant charge port or first pre charge a portion of refrigerant through the liquid line either open the outdoor unit stop valves or keep them closed See 6 7 4 To charge refrigerant on page 22 for more in...

Page 22: ...ht factor Piping Weight factor 6 4 mm 0 022 6 mm 0 018 9 5 mm 0 059 10 mm 0 065 Connection ratio requirements When selecting indoor units the connection ratio must comply with the following requiremen...

Page 23: ...g with the stop valves closed will damage the compressor NOTICE After adding the refrigerant do not forget to close the lid of the refrigerant charging port The tightening torque for the lid is 11 5 t...

Page 24: ...error No branching is allowed after branching A B C b2 b3 c1 c2 b1 a A Outdoor unit B Indoor unit C Central user interface etc a Main line b1 b2 b3 Branch lines c1 c2 No branch is allowed after branc...

Page 25: ...knockout holes wrap the wiring with protective tape to prevent damage b c a a Knockout hole b Burr c Sealant etc 6 8 4 Guidelines when connecting the electrical wiring Keep the following in mind If st...

Page 26: ...n sleeve for the conduits PG insertions can be inserted at the knockout hole When you do not use a wire conduit protect the wires with vinyl tubes to prevent the edge of the knockout hole from cutting...

Page 27: ...l Mode 2 field settings Mode 2 is used to change the field settings of the system Consulting the current field setting value and changing the current field setting value is possible In general normal...

Page 28: ...least 5 s INFORMATION If you get confused in the middle of the process press BS1 to return to the default situation 7 2 5 To use mode 1 In mode 1 and in default situation you can read out some informa...

Page 29: ...consumption limitation of the outdoor unit system The first method is to enable a forced power consumption limitation by field setting The unit will always operate at the selected power consumption li...

Page 30: ...ion was not aborted by pushing BS3 the unit will stop its operation after 30 minutes If 30 minutes was not sufficient to add the needed refrigerant amount the function can be reactivated by changing t...

Page 31: ...an external signal is sent to the unit this setting defines the level power consumption limitation that will be applied for step 2 The level is according to the table 30 default 40 50 2 32 Forced all...

Page 32: ...temperatures e g 15 C as under low outdoor ambient temperatures e g 5 C Using this idea the system automatically starts decreasing its refrigerant temperature automatically reducing the delivered capa...

Page 33: ...In case of cooling operation the evaporating temperature is allowed to go down to 6 C on temporary base depending on the situation In case of heating operation the condense temperature is allowed to...

Page 34: ...working on the indoor units When performing the test operation NOT only the outdoor unit but the connected indoor unit will operate as well Working on an indoor unit while performing a test operation...

Page 35: ...ttached to the rear side of the front cover Installation date and field setting Be sure to keep a record of the installation date on the sticker on the rear of the front panel according to EN60335 2 4...

Page 36: ...ant charge in kg 1000 10 1 Overview Maintenance and service This chapter contains information about Preventing electrical hazards when maintaining and servicing the system The refrigerant recovery ope...

Page 37: ...oose connections or defective wiring 11 2 Precautions when troubleshooting WARNING When carrying out an inspection on the switch box of the unit ALWAYS make sure that the unit is disconnected from the...

Page 38: ...unction S1NPL open circuit short circuit A1P X18A Check connection on PCB or actuator Transmission outdoor unit inverter INV1 FAN1 transmission trouble Check connection INV1 unbalanced power supply vo...

Page 39: ...00 500 B D E 1 2 1 HB HD HB HU 250 750 1000 500 HU HB HU 250 1000 1000 500 HB HU HB HD HD HU 100 1000 1000 500 HU HD HU 200 1000 1000 500 HD HU A B C 250 300 1000 A B C E 250 300 1000 1000 500 D 1000...

Page 40: ...A2 A1 If there is danger of drainage dripping and freezing between the upper and lower units A2 Then install a roof between the upper and lower units Install the upper unit high enough above the lowe...

Page 41: ...er h Service port high pressure i Muffler j Check valve k Compressor accumulator l Capillary tube m Service port refrigerant charge n Accumulator M1C Compressor M1F Fan motor R1T Thermistor air R2T Th...

Page 42: ...d main A2P Printed circuit board BS1 BS5 Push button switch C1 Capacitor DS1 DIP switch E1HC Crankcase heater F1U Fuse F3U F4U Fuse T 6 3 A 250 V F6U Fuse T 5 0 A 250 V H1P H8P Light emitting diode se...

Page 43: ...y Air SA direct expansion DX indoor units f Residential Air RA direct expansion DX indoor units g User interface wireless dedicated depending on indoor unit type 15 User interface CAUTION NEVER touch...

Page 44: ...st operation the heating capacity on the indoor unit side will temporarily drop until defrosting is completed After defrosting the unit will regain its full heating capacity The indoor unit will stop...

Page 45: ...er interface dedicated depending on indoor unit type e BP box required to connect Residential Air RA or Sky Air SA direct expansion DX indoor units f Residential Air RA direct expansion DX indoor unit...

Page 46: ...equipped with advanced energy saving functionality Depending on the priority emphasises can be put on energy saving or comfort level Several parameters can be selected resulting in the optimal balanc...

Page 47: ...it is indicated both in weight and CO2 equivalent Formula to calculate the quantity in CO2 equivalent tonnes GWP value of the refrigerant total refrigerant charge in kg 1000 Please contact your instal...

Page 48: ...le indicates main components Refer to your maintenance and inspection contract for more details The table indicates recommended intervals of replacement cycles However in order to keep the unit operat...

Page 49: ...or Movement detector or floor temperature sensor malfunction indoor User interface thermistor malfunction indoor PCB malfunction outdoor High pressure switch was activated Low pressure malfunction out...

Page 50: ...arts 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 the...

Page 51: ...n the selection is done the LOT 21 datasheet can be viewed as a PDF or a HTML webpage INFORMATION Other documents e g manuals can also be consulted from the resulting webpage 24 Glossary Dealer Sales...

Page 52: ...4P404224 1C 2019 07 Copyright 2015 Daikin...

Reviews: