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7 Troubleshooting

Installation manual

12

RXA42+50A2V1B

R32 split series

3P517827-2 – 2017.12

INFORMATION

▪ The  indoor  unit  may  produce  Intermittent  noise  due  to

the outdoor unit fan turning ON and/or OFF.

▪ Do  NOT  place  humidifiers  or  other  items  which  might

raise humidity in rooms when you use the facility mode.

▪ Cutting jumper J6 sets the indoor unit fan to the highest

speed.

▪ Do  NOT  use  this  setting  in  residences  or  offices  with

people.

7

Troubleshooting

7.1

Fault diagnosis using LED on
outdoor unit PCB

LED is…

Diagnosis

flashing

Normal.

▪ Check the indoor unit.

ON

▪ Turn  the  power  OFF  and  back  ON,  and

check  the  LED  within  approximately  3
minutes.
If  the  LED  is  ON  again,  the  outdoor  unit
PCB is faulty.

OFF

1

Supply voltage (for power saving).

2

Power supply fault.

3

Turn  the  power  OFF  and  back  ON,  and
check  the  LED  within  approximately  3
minutes.
If the LED is ON again, the outdoor unit
PCB is faulty.

DANGER: RISK OF ELECTROCUTION

▪ When  the  unit  is  not  operating,  the  LEDs  on  the  PCB

are turned off in order to save power.

▪ Even when the LEDs are off, the terminal block and the

PCB may be powered.

8

Disposal

NOTICE

Do  NOT  try  to  dismantle  the  system  yourself:  the
dismantling  of  the  system,  treatment  of  the  refrigerant,  oil
and  other  parts  MUST  comply  with  applicable  legislation.
Units  MUST  be  treated  at  a  specialised  treatment  facility
for reuse, recycling and recovery.

8.1

To pump down

Example: 

To  protect  the  environment,  pump  down  when  relocating

the unit or when disposing of the unit.

DANGER: RISK OF EXPLOSION

Pump  down  –  Refrigerant  leakage.

  If  you  want  to  pump

down the system, and there is a leakage 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

During pump down operation, stop the compressor before
removing  the  refrigerant  piping.  If  the  compressor  is  still
running and the stop valve is open during pump down, air
will be sucked into the system. Compressor breakdown or
damage to the system can result due to abnormal pressure
in the refrigerant cycle.

Pump down operation will extract all refrigerant from the system into
the outdoor unit.

1

Remove  the  valve  cap  from  the  liquid  stop  valve  and  the  gas
stop valve.

2

Carry  out  forced  cooling.  See 

"8.2  To  start  and  stop  forced

cooling" on page 12

.

3

After 5 to 10 minutes (after only 1 or 2 minutes in case of very
low ambient temperatures (<−10°C)), close the liquid stop valve
with a hexagonal wrench.

4

Check on the manifold if the vacuum is reached.

5

After  2-3  minutes,  close  the  gas  stop  valve  and  stop  forced
cooling.

c

b

e

d
d

a

a

Gas stop valve

b

Closing direction

c

Hexagonal wrench

d

Valve cap

e

Liquid stop valve

8.2

To start and stop forced cooling

There are 2 methods to perform forced cooling.

Method 1.

 Using the indoor unit ON/OFF switch (if present on the

indoor unit).

Method 2.

 Using the indoor unit user interface.

8.2.1

To start/stop forced cooling using the
indoor unit ON/OFF switch

1

Press the ON/OFF switch for at least 5 seconds.

Result: 

Operation will start.

Note: 

 Forced cooling stops automatically after 15 minutes.

2

To stop operation sooner, press the ON/OFF switch.

8.2.2

To start/stop forced cooling using the
indoor unit user interface

1

Set the operation mode to 

cooling

.

Summary of Contents for RXA42A2V1B

Page 1: ...Installation manual R32 split series English Installation manual R32 split series RXA42A2V1B RXA50A2V1B...

Page 2: ...n ne ovat muutettuina v platn m zn n Smjernice kako je izmijenjeno ir nyelv ek s m dos t saik rendelkez seit z p niejszymi poprawkami 18 19 20 21 22 23 24 25 Directivelor cu amendamentele respective D...

Page 3: ...ava 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 teplota TS TS...

Page 4: ...11 5 2 Checklist during commissioning 11 5 3 To perform a test run 11 6 Configuration 11 6 1 To set the facility mode 11 7 Troubleshooting 12 7 1 Fault diagnosis using LED on outdoor unit PCB 12 8 Dis...

Page 5: ...he air inlet facing the wall and NOT directly exposed to the wind b a b c a Baffle plate b Prevailing wind direction c Air outlet Do NOT install the unit in sound sensitive areas e g near a bedroom so...

Page 6: ...nce 20 m 3 2 3 Refrigerant piping insulation Pipe outer diameter p Insulation inner diameter i Insulation thickness t 6 4 mm 1 4 8 10 mm 10 mm 12 7 mm 1 2 14 16 mm i i t p p If the temperature is high...

Page 7: ...the outdoor unit from falling over In case the unit is installed in places where strong wind can tilt the unit take following measure 1 Prepare 2 cables as indicated in the following illustration fie...

Page 8: ...stem with nitrogen gas up to a gauge pressure of at least 200 kPa 2 bar It is recommended to pressurize to 3000 kPa 30 bar in order to detect small leaks 2 Check for leaks by applying the bubble test...

Page 9: ...4 4 3 To determine the additional refrigerant amount If the total liquid piping length is Then 10 m Do NOT add additional refrigerant If the total liquid piping length is Then 10 m R total length m o...

Page 10: ...NGER RISK OF ELECTROCUTION All electrical parts including thermistors are powered by the power supply Do not touch them with bare hands DC DC b c a d e g f a Multimeter DC voltage range b S80 reversin...

Page 11: ...arried out according to this document and the applicable legislation between the outdoor unit and the indoor unit Drainage Make sure drainage flows smoothly Possible consequence Condensate water might...

Page 12: ...se 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...

Page 13: ...anual of the indoor unit Note Forced cooling will stop automatically after around 30 minutes 2 To stop operation sooner press the ON OFF switch INFORMATION If forced cooling is used and the outside te...

Page 14: ...N E HA HE HL HN HR MR _A MR _B S U V W X A K R_ CONNECTION CONNECTOR Q L OVERLOAD PROTECTOR D V D DIODE Q M THERMOSWITCH DB DIODEBRIDGE R RESISTOR DS DIP SWITCH R T THERMISTOR E H HEATER RC RECEIVER F...

Page 15: ...nsion valve Cooling Heating Refrigerant flow Heat exchanger thermistor 1 2 3 4 1 4 Capillary tube Muffler Receiver gas Filter S1PH Automatic reset High pressure switch 6 4 CuT 4 0 CuT 7 9 CuT 7 9 CuT...

Page 16: ...3P517827 2 2017 12 Copyright 2017 Daikin...

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