Carrier 38NYV025M-A Service Manual

March, 2007FILE NO. SVM-07009SERVICE MANUALAIR-CONDITIONERSPLIT WALL TYPE12AMPMX42NQV025M / 38NYV025M42NQV025M-A / 38NYV025M-ADownloaded from AC-Manua

– 10 –43˚ to 45˚45˚ to 46˚B ACDTable 3-2-6 Flare and flare nut dimensions for R22Nominaldiameter1/43/81/25/83/4Outer diameter(mm)6.359.5212.7015.8819

– 11 –3-3. Tools3-3-1. Required ToolsThe service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A ischanged to

– 12 –Connect the charge hose to packed valve service port at the outdoor unit’s gas side.Recover the refrigerant, and check no refrigerant remains in

– 13 –Gauge manifold[ Cylinder with siphon ] [ Cylinder without siphon ]OUTDOOR unitGauge manifoldOUTDOOR unitRefrigerantcylinderElectronic balanceRef

– 14 –Nitrogen gascylinderPipeFlow meterMStop valveFrom Nitrogen cylinderNitrogen gasRubber plug2. Characteristics required for flux• Activated temper

– 15 –FILE NO. SVM-070094. CONSTRUCTION VIEWS4-1. Indoor Unit3845250235135 9040 165 45135902629050505560 556019157Front panelKnock out system860Hanger

CLCLFILE NO. SVM-070094-2. Outdoor Unit− 16 −Downloaded from AC-Manual.com Manuals

5. WIRING DIAGRAM5-1. Indoor UnitFILE NO. SVM-07009– 17 –Downloaded from AC-Manual.com Manuals

5-2. Outdoor UnitFILE NO. SVM-07009– 18 –Downloaded from AC-Manual.com Manuals

– 19 –6-2. Outdoor Unit (38NYV025M, 38NYV025M-A)No. Parts name Model name Rating1 SC coil L01 GET-04051 0.6mH, 15A(Noise filter) L03

– 2 –CONTENTS1. SAFETY PRECAUTIONS ... 32. SPECIFICATIONS ...

– 20 –7. REFRIGERANT CYCLE DIAGRAM7-1. Refrigerant Cycle Diagram42NQV025M / 38NYV025MNOTE :• The maximum pipe length of this air conditioner is 10 m.

– 21 –7-2. Operation Data<Cooling>Model name Standard Indoor Outdoor Compressorpressure fan mode fan mode revolutionIndoor Outdoor P (MPa) T1 (°

FILE NO. SVM-07009– 22 –8-1. Indoor Unit8. CONTROL BLOCK DIAGRAM Remote ControlOperation (ON/OFF)Operation Mode SelectionAUTO, COOL, DRY, HEAT, FAN ON

FILE NO. SVM-07009– 23 –8-2. Outdoor Unit (38NYV025M, 38NYV025M-A)For indoor unit1230V 50HzsignalNoisefilterInputcurrentsensorConverter(AC DC)P.

− 24−9. OPERATION DESCRIPTION9-1. Outline of Air Conditioner ControlThis air conditioner is a capacity-variable type airconditioner, which uses AC

– 25 −9-2. Operation Description 1. Basic operation ...

– 26 –Item1. BasicoperationOperation flow and applicable data, etc.1. Operation controlDescriptionReceiving the user’s operation condition setup, the

− 27 −Operation ON Setup of remote controllerIndoor fan motor control / Louver control / Operation HzControl (Requierment)Indoor unit controlSending

– 28 –Item2. Indoor fanmotor controlOperation flow and applicable data, etc.<In cooling operation>(This operation controls the fan speed at indo

– 29 –Item2. Indoor fanmotor controlOperation flow and applicable data, etc.<In heating operation>Description1) When setting the fan speed to L,

– 3 –1. SAFETY PRECAUTIONSFor general public usePower supply cord of outdoor unit shall be more than 1.5 mm2 (H07RN-F or 60245IEC66) polychloroprenes

– 30 –Item3. CapacitycontrolOperation flow and applicable data, etc.The cooling or heating capacity depending on the load isadjusted.According to diff

– 31 –Item5. Release protectivecontrol by tempera-ture of indoor heatexchangerOperation flow and applicable data, etc.<In cooling/dry operation>

– 32 –ItemOperation flow and applicable data, etc.Description6. Defrost control(Only in heatingoperation)(This function removes frost adhered to the o

HorizontalblowingInclinedblowingBlowingdownwardAir directionInclinedblowingHorizontalblowingInitial setting of "Cooling storage position"Lou

– 34 –Item8. ECOoperationOperation flow and applicable data, etc.When pressing [ECO] button on the remote controller, a Economic operation is performe

– 35 –Item9. TemporaryoperationOperation flow and applicable data, etc.Pressing [RESET] button starts the temporary opera-tion of [AUTO] operation. Wh

Item11. Romote-A or BselectionOperation flow and applicable data, etc.Description1. PurposeThis operation is to operate only oneindoor unit using one

ItemOperation flow and applicable data, etc.Description12. Hi-POWER ([Hi-POWER] button on the remote controller is pressed)When [Hi-POWER] button is p

– 38 –OperationPress [RESET] button for more thanthree seconds. (Less than 10 seconds)MotionsThe unit is on standby.↓The unit starts to operate. The g

– 39 –OperationPress [RESET] button for more thanthree seconds. (Less than 10 seconds)MotionsThe unit is on standby.↓The unit starts to operate. The g

– 4 –• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURETO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.• TO PR

9-4. Remote control9-4-1. Remote control and its functionsFILE NO. SVM-07009− 40 −9-4-2. Operation of remote control1. AUTOMATIC OPERATIONTo automat

– 41 –5. ECO OPERATIONTo automatically control room to save energy (except in DRY and FAN ONLY mode)Press : Start and stop the operation.Note:

− 42 −9. AUTO RESTART OPERATIONTo automatically restart the conditioner after the power failure (Power of the unit must be on.)1. Press and hold the

– 43 –179863421059-4-3. Name and Functions of Indications on Remote Controller[Display]All indications, except for the clock time indicator, are displ

− 44 −9-5. Hi-POWER Mode([Hi-POWER] button on the remote controller is pressed)When [Hi-POWER] button is pressed while the indoor unit is in Auto, Coo

10-1-1. Installation Diagram of Indoor and Outdoor UnitsShield pipeAir filterHookHook(Attach to the front panel.)65 mm or more170 mm or more1 Installa

– 46 −FILE NO. SVM-0700910-1-2. Optional installation parts<Fixing bolt arrangement of outdoor unit> Secure the outdoor unit with the fixing bo

– 47 –FILE NO. SVM-07009PartNo.123Part name (Q’ty)Installation plate x 1Wireless remote control x 1Battery x 2Part name (Q’ty)Remote control holder x

– 48 –FILE NO. SVM-07009• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating inthe U. S’s A

– 49 –FILE NO. SVM-0700910-2. Indoor Unit10-2-1. Installation place• A place which provides the spaces around theindoor unit as shown in the above dia

FILE NO. SVM-07009– 5 – 1. SPECIFICATIONS1-1. Specifications Unit model Indoor 42NQV025M, 42NQV025M-AOutdoor 38NYV025M, 38NYV025M-ACooling capacity (

– 50 –FILE NO. SVM-07009<When the installation plate is directly mounted onthe wall>1. Securely fit the installation plate onto the wall byscrew

– 51 –FILE NO. SVM-0700910-2-4. Wiring connection<How to connect the connecting cable>Wiring of the connecting cable can be carried outwithout r

– 52 –FILE NO. SVM-07009<How to fix the Drains Cap>1) Insert hexagonal wrench (∅4 mm) in a center head.Fig. 10-2-82) Firmly insert drains cap.Fi

– 53 –FILE NO. SVM-070092. Put water in the drain pan and make sure that thewater is drained out of doors.3. When connecting extension drain hose, ins

– 54 –FILE NO. SVM-0700910-3-2. Refrigerant piping connection<Flaring>1. Cut the pipe with a pipe cutter.Fig.10-3-22. Insert a flare nut into th

– 55 –FILE NO. SVM-0700910-3-3. EvacuatingAfter the piping has been connected to the indoor unit,you can perform the air purge together at once.AIR PU

– 56 –FILE NO. SVM-07009<Stripping length of connection cable>CAUTION• Wrong wiring connection may cause someelectrical parts burn out.• Be sure

– 57 –FILE NO. SVM-07009Fig. 10-3-10• Check the flare nut connections for the gas leakwith a gas leak detector or soap water.10-3-6. Test operationTo

FILE NO. SVM-07009– 58 –11. HOW TO DIAGNOSE THE TROUBLEThe pulse modulating circuits are mounted to bothindoor and outdoor units. Therefore, diagnose

FILE NO. SVM-07009– 59 –11-1-3. Operation which is not a trouble (Program operation)For controlling the air conditioner, the program operations are bu

2-2. Operation Characteristic Curve<Cooling> <Heating>01234560 102030405060708090100110120Compressor Speed (rps)Current (A)01234560 102030

– 60 –11-3. Judgment by Flashing LED of Indoor UnitWhile the indoor unit monitors the operation status of the air conditioner, if the protective circu

Alphanumeric characters are used for the check codes. is 5. is 6. is A. is B. is C. is D.ONOFFFILE NO. SVM-07009Press [

FILE NO. SVM-07009– 62 –11-4-2. Caution at servicing(1) After servicing, push the [ ] button to return to the normal mode.(2) After servicing by t

FILE NO. SVM-07009– 63 –Block distinction Operation of diagnosis functionJudgement and actionCheckBlockCheckCause of operationAir conditionerRemarkcod

– 64 –OperationMeasureItem by symptomsCheck itemConceivable principle causeParts(D01, D04,C03, T101and IC12)are defective.• Be sure to disconnect the

(2) Power is not turned on though Indoor P.C. board is replaced<Confirmation procedure>YES YESNO NOTo item of “Power is not turned on”.Turn on p

FILE NO. SVM-07009– 66 –(3) Only the indoor fan does not operate.Replace the fan motor.YESNONOYESYESNONOYESYESYESNONO NOYESDoes the fan stop inno oper

FILE NO. SVM-07009– 67 –(4) Troubleshooting for remote controlPress [ ]button.Is transmissionmark indicated?Press RESET buttonon remote controlwith

FILE NO. SVM-07009– 68 –11-5-2. Wiring Failure (Interconnected and serial signal wire)(1) Outdoor unit does not operate.1) Is the voltage between 2 an

FILE NO. SVM-07009– 69 –11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E<Check procedure>OperationMeasureItem by symptomsCheck it

– 7 –3. REFRIGERANT R410AThis air conditioner adopts the new refrigerant HFC(R410A) which does not damage the ozone layer.The working pressure of the

FILE NO. SVM-07009– 70 –AB CDiagnosis/Process flowchart ItemCheckOperationCheckSummary→OK if 10MΩ or more→OK if 0.51Ω →0.57Ω (Check by adigital teste

FILE NO. SVM-07009(3) Checking procedure.Table 11-6-1No.123456Procedure1. Application of shock voltage.Overload by short-circuit of theparts.1. AC pow

FILE NO. SVM-07009– 72 –A B C11-7. How to Diagnose Trouble in Outdoor Unit11-7-1. Summarized inner diagnosis of inverter assemblyDiagnosis/Process flo

FILE NO. SVM-07009– 73 –11-8-2. P.C. board layoutTD : Discharge temp. sensorTC : Heat exchanger temp. sensorTO : Outdoor temp. sensorTE : Outdoor hea

FILE NO. SVM-07009– 74 –Disconnect the connector and measure the resistance value withtester. (Normal temp.)To item of How to judge whether remote con

FILE NO. SVM-07009– 75 –1 Electrolytic capacitor (Forraising pressure, smoothing)2 Rectifier11-8-6. Checking method for each partNo. Part name Checkin

FILE NO. SVM-07009– 76 –11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad1. Symptom• Outdoor fan motor does not rotate.• Outdoor fan

− 77 −How to remove the front panel1) Stop the operation of the air conditioner andturn off its main power supply.2) Pull the air inlet grille towar

− 78 −1) Remove the front panel, electrical part andthe horizontal louver following procedure 3.2) Remove the pipe holder at the rear side ofmain uni

FILE NO. SVM-07009– 79 –1) Turn the power supply off to stop the operationof air conditioner.2) Remove the front panel.• Remove the 4 fixing screws.3)

– 8 –Table 3-2-1 Thicknesses of annealed copper pipesNominal diameter1/43/81/25/8Outer diameter (mm)6.359.5212.7015.88Thickness (mm)R410A R220.80 0.8

FILE NO. SVM-07009– 80 –<P.C. board layout> Solder sideDownloaded from AC-Manual.com Manuals

FILE NO. SVM-07009– 81 –12-3-1. Outdoor Unit No. Part name Procedures Remarks1. Detachment1) Stop operation of the air conditioner, andturn off the ma

FILE NO. SVM-07009– 82 –No. Part name Procedures Remarks1) Perform work of item 1 of 1.2) Remove screw (ST1T∅4 x 10s 1 pc.) ofthe upper part of the fr

FILE NO. SVM-07009– 83 –No. Part name Procedures Remarks1) Disconnect lead wires and connectorsconnected from the control boardassembly to other parts

FILE NO. SVM-07009– 84 –No. Part name Procedures Remarks1) Perform work of item 1 of 1 and 1 of 2.2) Remove the flange nut fixing the fan motorand the

FILE NO. SVM-07009– 85 –No. Part name Procedures Remarks1. Detachment1) Perform work of item 1 of 1 and 1 of 2.Requirement:Perform the work on a corru

FILE NO. SVM-07009– 86 –No. Part name Procedures Remarks1)Cut the sensor 100 mm longer than oldone.2) Cut the protective tube after pulling out it(200

FILE NO. SVM 07009− 87 −13. EXPLODED VIEWS AND PARTS LIST13-1. Indoor Unit (E-Parts Assy)Location Part Location PartNo. No. No. No.401 43T60365 TERMIN

FILE NO. SVM-07009− 88 −13-2. Indoor Unit203204202227225226205 Electric Parts Assembly 219213211210209212207206229220222224221228208218217204201Lo

FILE NO. SVM-07009− 89 −13-3. Outdoor Unit (38NYV025M, 38NYV025M-A)Location Part Location PartNo. No. No. No.1 43T19334 FAN GUARD 15 43T49327 CUSHIO

– 9 –AØDd) Flare ProcessingMake certain that a clamp bar and copperpipe have been cleaned.By means of the clamp bar, perform the flareprocessing corre

FILE NO. SVM-07009− 90 −13-4. Outdoor Unit (E-Parts Assy)Location Part Location PartNo. No. No. No.701 43T62320 HEATSINK 705 43T60377 TEMPERATURE S

FILE NO. SVM-03008– 87 –Downloaded from AC-Manual.com Manuals