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8 Troubleshooting

Installation and operation manual

8T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1B – 2016.04

Main code

Sub code

Cause

Solution

High pressure sensor malfunction

Compressor unit: (S1NPH): open circuit - A1P
(X32A)

Check connection on PCB or actuator.

High pressure sensor malfunction

Compressor unit: (S1NPH): short circuit - A1P
(X32A)

Check connection on PCB or actuator.

Low pressure sensor malfunction

Compressor unit: (S1NPL): open circuit - A1P
(X31A)

Check connection on PCB or actuator.

Low pressure sensor malfunction

Compressor unit: (S1NPL): short circuit - A1P
(X31A)

Check connection on PCB or actuator.

Transmission outdoor unit - inverter: INV1
transmission trouble

Compressor unit: A1P (X20A, X28A, X42A)

Check connection.

INV1 unbalanced power supply voltage

Check if power supply is within range.

Heat exchanger unit capacity setting malfunction.

Check the type of heat exchanger unit. If
necessary, replace the heat exchanger unit.

Reversed power supply phase malfunction

Correct phase order.

Reversed power supply phase malfunction

Correct phase order.

INV1 voltage power shortage

Check if power supply is within range.

INV1 power phase loss

Check if power supply is within range.

Malfunction code: System test run not yet
executed (system operation not possible)

Execute system test run.

Faulty wiring to Q1/Q2 or indoor - outdoor

Check (Q1/Q2) wiring. Do NOT use Q1/Q2.

Faulty wiring to Q1/Q2 or indoor - outdoor

Check (Q1/Q2) wiring. Do NOT use Q1/Q2.

System test run abnormal ending

Execute test run again.

Warning: faulty wiring to Q1/Q2

Check Q1/Q2 wiring. Do NOT use Q1/Q2.

Malfunction code: faulty wiring to Q1/Q2

Check Q1/Q2 wiring. Do NOT use Q1/Q2.

▪ Too many indoor units are connected to F1/F2

line

▪ Bad wiring between outdoor and indoor units

Check indoor unit amount and total capacity
connected.

▪ System mismatch. Wrong type of indoor units

combined (R410A, R407C, RA, etc). Indoor unit
malfunction

▪ Heat exchanger unit malfunction

▪ Check if other indoor units have malfunction and

confirm indoor unit mix is allowed.

▪ Check the transmission wiring to the heat

exchanger unit.

More than 1 heat exchanger unit connected.

Check installation. Only 1 heat exchanger unit can
be installed.

▪ Improper type of indoor units are connected.

▪ Mismatch of compressor unit and heat

exchanger unit.

▪ Check the type of indoor units that are currently

connected. If they are not proper, replace them
with proper ones.

▪ Check if the compressor unit and heat

exchanger unit are compatible.

5 HP heat exchanger unit connected.

Check installation. Connect 8 HP heat exchanger
unit.

▪ Auto address malfunction (inconsistency)

▪ Mismatch of compressor unit and heat

exchanger unit.

▪ Check if transmission wired unit amount

matches with powered unit amount (by monitor
mode) or wait till initialisation is finished.

▪ Check if the compressor unit and heat

exchanger unit are compatible.

Содержание VRV IV RKXYQ8T7Y1B

Страница 1: ...Installation and operation manual VRV IV compressor unit for indoor installation English Installation and operation manual VRV IV compressor unit for indoor installation RKXYQ5T7Y1B RKXYQ8T7Y1B ...

Страница 2: ...kel 1 2f des PED außerhalb der Reichweite Risikoart H Siehe auch nächste Seite tel que défini dans A et évalué positivement par B conformément au Certificat C tel que stipulé dans le Fichier de Construction Technique D et jugé positivement par E Module appliqué F Les unités RD K XYQ5T7V Y 1B RDXYQ8T7V1B ne sont pas concernées en raison de l article 1 2f de PED Catégorie de risque H Se reporter éga...

Страница 3: ... lämpötila TS TSmin Alhaisin matalapainepuolen lämpötila L C TSmax Suurinta sallittua painetta PS vastaava kyllästyslämpötila M C Kylmäaine N Varmuuspainelaitteen asetus P bar Valmistusnumero ja valmistusvuosi katso mallin nimikilpi Maximální přípustný tlak PS K bar Minimální maximální přípustná teplota TS TSmin Minimální teplota na nízkotlaké straně L C TSmax Saturovaná teplota odpovídající maxim...

Страница 4: ...the compressor unit installation 18 5 8 1 To finish the transmission wiring 18 6 Configuration 18 6 1 Making field settings 18 6 1 1 About making field settings 18 6 1 2 To access the field setting components 19 6 1 3 Field setting components 19 6 1 4 To access mode 1 or 2 20 6 1 5 To use mode 1 and default situation 20 6 1 6 To use mode 2 21 6 1 7 Mode 1 and default situation Monitoring settings ...

Страница 5: ...t of a documentation set The complete set consists of General safety precautions Safety instructions that you must read before installing Format Paper in the accessory bag of the compressor unit Compressor unit installation and operation manual Installation and operation instructions Format Paper in the accessory bag of the compressor unit Heat exchanger unit installation manual Installation instr...

Страница 6: ...15 5 C WB Cooling 5 46 C DB Ambient design temperature of compressor unit and heat exchanger unit 5 35 C DB Maximum relative humidity around the compressor unit and heat exchanger unit Heating 50 a Cooling 80 a a To avoid condensation and water dripping out of the unit If the temperature or the humidity is beyond these conditions safety devices may be put in action and the air conditioner may not ...

Страница 7: ...requirements 10 a 10 10 500 10 mm b a Top view b Front view CAUTION Appliance not accessible to the general public install it in a secured area protected from easy access These units compressor unit heat exchanger unit and indoor units are suitable for installation in a commercial and light industrial environment NOTICE This is a class A product In a domestic environment this product may cause rad...

Страница 8: ... outer diameter size mm Gas pipe Liquid pipe 5 HP 19 1 12 7 8 HP 22 2 B Piping between compressor unit and first refrigerant branch kit Use the following diameters Compressor unit capacity type Piping outer diameter size mm Gas pipe Liquid pipe Standard Size up Standard Size up 5 HP 15 9 19 1 9 5 8 HP 19 1 22 2 9 5 12 7 Standard Size up If Then The equivalent pipe length between the heat exchanger...

Страница 9: ...40 m Maximum height differences b 1 Heat exchanger unit Compressor unit H1 10 m 2 Compressor unit Indoor unit H2 30 m H3 30 m 3 EKEXV AHU H4 5 m 4 Indoor unit Indoor unit H5 15 m a Assume equivalent piping length of refnet joint 0 5 m and refnet header 1 m for calculation purposes of equivalent piping length not for refrigerant charge calculations b Either unit can be the highest unit 4 3 Preparin...

Страница 10: ...nnect electrical wiring remove the switch box cover 4 4 5 HP 8 HP 5 2 Mounting the compressor unit 5 2 1 Guidelines when installing the compressor unit Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise If the vibration might be transmitted to the building use a vibration proof rubber field supply You can install the compressor ...

Страница 11: ...e service port cover securely For the tightening torque refer to the table below Check for refrigerant leaks after tightening the service port cover Tightening torques Stop valve size mm Tightening torque N m turn clockwise to close Shaft Valve body Hexagonal wrench Cap valve lid Service port Ø9 5 5 4 6 6 4 mm 13 5 16 5 11 5 13 9 Ø12 7 8 1 9 9 18 0 22 0 Ø19 1 27 0 33 0 8 mm 22 5 27 5 5 3 2 To remo...

Страница 12: ...nel or side panel 1 Remove the service cover See 5 1 1 To open the compressor unit on page 10 2 Choose a piping route a or b b a a a To the back b To the top 3 If you have chosen the piping route to the top a b c d a Cut the insulation under the knockout hole b Hit on the knockout hole and remove it c Remove the burrs d Paint the edges and areas around the edges using repair paint to prevent rusti...

Страница 13: ...ny leakages in the refrigerant piping Performing vacuum drying to remove all moisture air or nitrogen in the refrigerant piping If there is a possibility of moisture being present in the refrigerant 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 leaks O...

Страница 14: ...recommended bubble test solution from your wholesaler Do not use soap water which may cause cracking of flare nuts soap water may contain salt which absorbs moisture that will freeze when the piping gets cold and or lead to corrosion of flared joints soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare 5 4 5 To perform vacuum drying To rem...

Страница 15: ...nded off in units of 0 1 kg R X1 Ø12 7 0 12 X2 Ø9 5 0 059 X3 Ø6 4 0 022 A B X1 3 Total length m of liquid piping size at Øa Parameter A and B Model Parameter A Parameter B RKXYQ5 0 8 3 1 kg RKXYQ8 1 0 2 6 kg Metric piping When using metric piping please take into account following table concerning the weight factor to be allocated It should be substituted in the formula for R Inch piping Metric pi...

Страница 16: ...ORMATION The manual refrigerant charge operation will automatically stop within 30 minutes If charging is not completed after 30 minutes perform the additional refrigerant charging operation again INFORMATION When a malfunction is detected during the procedure e g in case of closed stop valve a malfunction code will be displayed In that case refer to 5 6 4 Error codes when charging refrigerant on ...

Страница 17: ...hanger unit a Main line The main line is the line to which the transmission wiring of the heat exchanger unit is connected b1 b2 b3 Branch lines c1 c2 No branch is allowed after branch 5 7 2 Guidelines when connecting the electrical wiring Tightening torques Wiring Screw size Tightening torque N m Power supply wiring power supply shielded ground M5 2 0 3 0 Transmission wiring M3 5 0 8 0 97 5 7 3 T...

Страница 18: ...ure below a b c d e a Liquid pipe b Gas pipe c Insulator d Transmission wiring F1 F2 e Finishing tape 6 Configuration INFORMATION It is important that all information in this chapter is read sequentially by the installer and that the system is configured as applicable DANGER RISK OF ELECTROCUTION 6 1 Making field settings 6 1 1 About making field settings To configure the heat pump system you must...

Страница 19: ...settings if you install a cool heat selector switch Model DIP switch 5 HP DS1 1 COOL HEAT selector refer to the manual of the cool heat selector switch OFF not installed factory setting DS1 2 NOT USED DO NOT CHANGE THE FACTORY SETTING Model DIP switch 8 HP DS1 1 COOL HEAT selector see 3 3 1 Possible options for the compressor unit and heat exchanger unit on page 6 OFF not installed factory setting...

Страница 20: ...B S 1 B S 1 B S 1 a c b B S 1 5 s B S 1 B S 1 B S 1 a b c 5 HP 8 HP a Default situation H1P OFF b Mode 1 H1P flashing c Mode 2 H1P ON BS1 Press BS1 BS1 5 s Press BS1 for at least 5 s INFORMATION If you get confused in the middle of the process press BS1 to return to the default situation 6 1 5 To use mode 1 and default situation In mode 1 and in default situation you can read out some information ...

Страница 21: ...2 BS1 5 s 3 Select setting 8 X depends on the setting that you want to select BS2 X Action Button display 4 Select value 4 8 C a Display the current value b Change to 4 X depends on the current value and the value that you want to select c Enter the value in the system d Confirm The system starts operating according to the setting BS3 1 BS2 X b a BS3 1 c BS3 1 d 5 Quit mode 2 BS1 1 6 1 7 Mode 1 an...

Страница 22: ...1 16 Shows the 3rd last malfunction code 7 segments display Mode 1 in case of 8 HP You can read out the following information Setting Value Description 1 1 Shows the status of low noise operation 0 Unit is currently not operating under low noise restrictions 1 Unit is currently operating under low noise restrictions Low noise operation reduces the sound generated by the unit compared to nominal op...

Страница 23: ...y and the settings differ depending on the model Model Display Setting value 5 HP 7 LEDs display The seven LEDs give a binary representation of the setting value number 8 HP 7 segments display The three 7 segments show the setting value number Setting Value 8 HP 5 HP Description 2 8 Te target temperature during cooling operation 0 default default Auto 2 6 C 3 7 C 4 8 C 5 9 C 6 10 C 7 11 C 2 9 Tc t...

Страница 24: ...the reclaim of refrigerant or vacuuming process can be done properly 0 default binary 1 default Deactivated 1 binary 2 Activated To stop the refrigerant recovery vacuuming mode push BS1 in case of 5 HP or BS3 in case of 8 HP If it is not pushed the system will remain in refrigerant recovery vacuuming mode 2 22 Automatic low noise setting and level during night time By changing this setting you act...

Страница 25: ...setting defines the level power consumption limitation that will be applied for step 2 The level is according to the table binary 1 30 1 default binary 2 default 40 2 binary 4 50 3 55 2 32 Forced all time power consumption limitation operation no external control adaptor is required to perform power consumption limitation If the system always needs to be running under power consumption limitation ...

Страница 26: ...cting the electrical wiring on page 17 according to the wiring diagrams and according to the applicable legislation Power supply voltage Check the power supply voltage on the local supply panel The voltage must correspond to the voltage on the identification label of the unit Earth wiring Be sure that the earth wires have been connected properly and that the earth terminals are tightened Insulatio...

Страница 27: ...e connected indoor units NOTICE Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor 3 Make sure the default idle situation is existing H1P is OFF see 6 1 4 To access mode 1 or 2 on page 20 Push BS4 for 5 seconds or more The unit will start test operation Result The test operation is automatically carried out the...

Страница 28: ...he indoor unit should be switched ON Refer to the indoor unit operation manual for more details 8 Troubleshooting 8 1 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 In ca...

Страница 29: ...on open circuit short circuit Compressor unit BIPH A1P X17A Check connection on PCB or actuator Low pressure sensor malfunction open circuit short circuit Compressor unit BIPL A1P X18A Check connection on PCB or actuator Transmission compressor unit inverter INV1 transmission trouble Check connection INV1 unbalanced power supply voltage Check if power supply is within range Heat exchanger unit cap...

Страница 30: ...n valve malfunction subcool Compressor unit Y1E A1P X21A Check connection on PCB or actuator Electronic expansion valve malfunction main Heat exchanger unit Y1E A1P X7A Check connection on PCB or actuator Discharge temperature too high Stop valve closed Refrigerant shortage Compressor unit R21T A1P X29A Open stop valves Check refrigerant amount recharge unit Refrigerant overcharge Stop valve close...

Страница 31: ...o Q1 Q2 or indoor outdoor Check Q1 Q2 wiring Do NOT use Q1 Q2 Faulty wiring to Q1 Q2 or indoor outdoor Check Q1 Q2 wiring Do NOT use Q1 Q2 System test run abnormal ending Execute test run again Warning faulty wiring to Q1 Q2 Check Q1 Q2 wiring Do NOT use Q1 Q2 Malfunction code faulty wiring to Q1 Q2 Check Q1 Q2 wiring Do NOT use Q1 Q2 Too many indoor units are connected to F1 F2 line Bad wiring be...

Страница 32: ... B Compressor unit a Stop valve gas circuit 2 to indoor units b Stop valve liquid circuit 2 to indoor units c Stop valve liquid circuit 1 to heat exchanger unit d Stop valve gas circuit 1 to heat exchanger unit e Service port refrigerant charge f Filter g Subcool heat exchanger h Pressure regulating valve i Capillary tube j Accumulator k Compressor accumulator l Heat exchanger M1C Compressor M1F M...

Страница 33: ...ssor R7T Thermistor liquid R10T Thermistor fin S1NPL Low pressure sensor S1NPH High pressure sensor S1PH High pressure switch S S Cool heat selector switch optional V1R IGBT power module A2P V2R Diode module A2P X1M Terminal strip power supply X2M Terminal strip transmission wiring X Y Connector Y3E Electronic expansion valve Y1S Solenoid valve 4 way valve Z C Noise filter ferrite core Z F Noise f...

Страница 34: ...ternal 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 internal parts contact your dealer This operation manual will give a non exhaustive overview of the main functions of the system Detailed information on required actions to achieve certain functions can be found in the dedicated inst...

Страница 35: ...ld air from blowing out of an indoor unit at the start of heating operation the indoor fan is automatically stopped The display of the user interface shows It may take some time before the fan starts This is not a malfunction 12 2 4 To operate the system WITHOUT cool heat changeover remote control switch 1 Press the operation mode selector button on the user interface several times and select the ...

Страница 36: ...units Wall mounted units For the following conditions a micro computer controls the air flow direction which may be different from the display Cooling Heating When the room temperature is lower than the set temperature When starting operation When the room temperature is higher than the set temperature At defrost operation When operating continuously at horizontal air flow direction When continuou...

Страница 37: ...n WARNING The refrigerant in the system is safe and normally does not leak If the refrigerant leaks in the room contact with a fire of a burner a heater or a cooker may result in a harmful gas Turn off any combustible heating devices 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 le...

Страница 38: ...If after checking all above items it is impossible to fix the problem yourself contact your installer and state the symptoms the complete model name of the unit with manufacturing number if possible and the installation date possibly listed on the warranty card 14 1 Error codes Overview In case a malfunction code appears on the indoor unit user interface display contact your installer and inform t...

Страница 39: ...because cool heat changeover is controlled by the cool heat changeover remote control switch Ask your dealer where the remote control switch is installed 14 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 minu...

Страница 40: ...mes out of the heat exchanger unit When the unit is used for the first time in a long time This is because dust has gotten into the heat exchanger unit 14 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 14 2 14 Symptom The heat exchanger unit fan does not spin During operation The speed of the fan is controlled in or...

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