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11 Troubleshooting

Installer reference guide

21

ARXM25~35 RXM20~35 RXJ20~3
RXA20~35A3V1B
R32 split series
4P518023-5D – 2019.04

NOTICE

Applicable  legislation  on 

fluorinated  greenhouse  gases

requires  that  the  refrigerant  charge  of  the  unit  is  indicated
both in weight and CO

2

 equivalent.

Formula  to  calculate  the  quantity  in  CO

2

  equivalent

tonnes:

  GWP  value  of  the  refrigerant  ×  total  refrigerant

charge [in kg] / 1000

10.1

Overview: Maintenance and
service

This chapter contains information about:

▪ The yearly maintenance of the outdoor unit

10.2

Maintenance safety precautions

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING

NOTICE: Risk of electrostatic discharge

Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.

WARNING

▪ Before  carrying  out  any  maintenance  or  repair  activity,

ALWAYS  switch  off  the  circuit  breaker  on  the  supply
panel, remove the fuses or open the protection devices
of the unit.

▪ Do NOT touch live parts for 10 minutes after the power

supply is turned off because of high voltage risk.

▪ Please  note  that  some  sections  of  the  electric

component box are hot.

▪ Make sure you do NOT touch a conductive section.

▪ Do NOT rinse the unit. This may cause electric shocks

or fire.

10.3

Checklist for yearly maintenance
of the outdoor unit

Check the following at least once a year:

▪ Heat exchanger

The heat exchanger of the outdoor unit can get blocked up due to
dust,  dirt,  leaves,  etc.  It  is  recommended  to  clean  the  heat
exchanger  yearly.  A  blocked  heat  exchanger  can  lead  to  too  low
pressure or too high pressure leading to worse performance.

11

Troubleshooting

11.1

Overview: Troubleshooting

This chapter describes what you have to do in case of problems.

It contains information about solving problems based on symptoms.

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
symptoms

11.3.1

Symptom: Indoor units fall, vibrate or
make noise

Possible causes

Corrective action

The indoor units are not installed
securely

Install the indoor units securely.

11.3.2

Symptom: The unit is NOT heating or
cooling as expected

Possible causes

Corrective action

Wrong connection of the
electrical wires

Connect the electrical wires
correctly.

Gas leakage

Check for gas leakage.

11.3.3

Symptom: Water leakage

Possible causes

Corrective action

Incomplete thermal insulation
(gas and liquid piping, indoor
portions of the drain hose
extension)

Make sure the thermal insulation
of the piping and the drain hose
is complete.

Improperly connected drainage

Secure the drainage.

11.3.4

Symptom: Electrical leakage

Possible causes

Corrective action

The unit is NOT earthed correctly Check and correct the

connection of the earth wiring.

11.3.5

Symptom: Unit does NOT function or burn
damage

Possible causes

Corrective action

The wiring was NOT performed
in accordance with the
specifications

Correct the wiring.

Содержание RXJ20M3V1B

Страница 1: ...eference guide R32 split series English Installer reference guide R32 split series ARXM25N2V1B9 ARXM35N2V1B9 RXM20N2V1B9 RXM25N2V1B9 RXM35N2V1B9 RXJ20M3V1B RXJ25M3V1B RXJ35M3V1B RXA20A3V1B RXA25A3V1B...

Страница 2: ...iping 15 6 5 3 To check for leaks 15 6 5 4 To perform vacuum drying 15 6 6 Charging refrigerant 16 6 6 1 About charging refrigerant 16 6 6 2 About the refrigerant 16 6 6 3 Precautions when charging re...

Страница 3: ...ive gloves safety glasses when installing maintaining or servicing the system WARNING Tear apart and throw away plastic packaging bags so that nobody especially children can play with them Possible ri...

Страница 4: ...nstallation of pipework shall be kept to a minimum WARNING If appliances contain R32 refrigerant the floor area of the room in which the appliances are installed operated and stored MUST be larger tha...

Страница 5: ...gas leaks ventilate the area immediately Possible risks Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency Toxic gas may be produced if refrigerant gas comes into con...

Страница 6: ...e fixed wiring WARNING ONLY use copper wires Make sure the field wiring complies with the applicable legislation All field wiring MUST be performed in accordance with the wiring diagram supplied with...

Страница 7: ...latest technical data is available on the regional Daikin website publicly accessible The full set of latest technical data is available on the Daikin extranet authentication required 2 2 Installer r...

Страница 8: ...y flammable 4 1 Overview About the unit This chapter contains information about Identification of the outdoor unit 4 2 Identification NOTICE When installing or servicing several units at the same time...

Страница 9: ...ir outlet b Air inlet NOTICE The height of the wall on the outlet side of the outdoor unit MUST be 1200 mm NOTICE Do NOT stack the units on each other Do NOT hang the unit on a ceiling Strong winds 18...

Страница 10: ...eral snowfall is possible make sure that the heat exchanger coil is NOT affected by the snow If necessary install a snow cover or shed and a pedestal 5 2 3 Refrigerant piping length and height differe...

Страница 11: ...escribes what you have to do and know on site to install the system Typical workflow Installation typically consists of the following stages 1 Opening the unit 2 Mounting the outdoor unit 3 Connecting...

Страница 12: ...bottom side of the unit in order to prevent water from getting into the unit and to avoid drain water dripping see the following figure NOTICE If the unit is installed in a cold climate take adequate...

Страница 13: ...ion period Protection method Outdoor unit 1 month Pinch the pipe 1 month Pinch or tape the pipe Indoor unit Regardless of the period INFORMATION Do NOT open the refrigerant stop valve before checking...

Страница 14: ...panner on the stem cap as this could cause a refrigerant leak a b a Spanner b Torque wrench When it is expected that the operating pressure will be low e g when cooling will be performed while the out...

Страница 15: ...ely Using the same pump for other refrigerants may damage the pump and the unit NOTICE Connect the vacuum pump to the service port of the gas stop valve Make sure that the gas stop valve and liquid st...

Страница 16: ...Vacuum drying on the outdoor unit s internal refrigerant piping is performed NOTICE Before completely recharging perform vacuum drying on the outdoor unit s internal refrigerant piping as well Typical...

Страница 17: ...CO2 equivalent Formula to calculate the quantity in CO2 equivalent tonnes GWP value of the refrigerant total refrigerant charge in kg 1000 Use the GWP value mentioned on the refrigerant charge label...

Страница 18: ...A A a Curled single core wire b Screw c Flat washer Stranded conductor wire with round crimp style terminal c b b a c a B B a Terminal b Screw c Flat washer O Allowed X NOT allowed Tightening torques...

Страница 19: ...cally consists of the following stages 1 Checking the Checklist before commissioning 2 Performing a test run for the system 7 2 Precautions when commissioning DANGER RISK OF ELECTROCUTION DANGER RISK...

Страница 20: ...sumes electricity When the power turns back on after a power break the previously selected mode will be resumed 7 6 Starting up the outdoor unit See the indoor unit installation manual for configurati...

Страница 21: ...based on symptoms 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 troublesho...

Страница 22: ...rate recovery system so that the unit s compressor does NOT have to operate NOTICE During pump down operation stop the compressor before removing the refrigerant piping If the compressor is still runn...

Страница 23: ...DS DIP SWITCH E H HEATER F U FU FOR CHARACTERISTICS FUSE REFER TO PCB INSIDE YOUR UNIT FG CONNECTOR FRAME GROUND H HARNESS H P LED V L PILOT LAMP LIGHT EMITTING DIODE HAP LIGHT EMITTING DIODE SERVICE...

Страница 24: ...rtain product or application explaining how to install configure and maintain it Operation manual Instruction manual specified for a certain product or application explaining how to operate it Mainten...

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Страница 28: ...4P518023 5D 2019 04 Copyright 2018 Daikin...

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