Air-Con 38B Service Manual

Wall MountedMini-Split SystemAir Conditioning/Heat PumpService ManualB/A-HMC09ASB/A-HMC12AS, B/A-HMH12ASB/A-HMC18AS, B/A-HMH18ASB/A-HMC24AS, B/A-HMH24

- 10 -INDOOR UNITHEATEXCHANGER(EVAPORATOR)HEATEXCHANGER(CONDENSER)COMPRESSORGAS SIDECAPILLARY TUBELIQUID SIDEOUTDOOR UNIT• Cooling Only ModelsMODEL9K,

- 11 -INDOOR UNITHEATEXCHANGER(EVAPORATOR)HEATEXCHANGER(CONDENSER)REVERSINGVALVECOMPRESSORCOOLINGHEATINGGAS SIDECAPILLARY TUBECHECK VALVELIQUID SIDEOU

- 12 -Wiring Diagram(1) Indoor Unit1. 9K, 12K, 18K, 24K(Cooling Only Models, Cooling & Heating Models)4321BLDCMOTORSTEPMOTORMAIN P.C.BINDOOR WIRIN

- 13 -(2) Outdoor Unit• Cooling Only Models1. 9K, 12K3. 24K2. 18KBLBLBKBKFUSE3.15AFUSE2.5AZNRCN-DC/DCRY-COMP34MAIN P.C.BYLMOTORRDBLBRBLRDBRBLTERMINALB

- 14 -• Cooling & Heating Models1. 9K, 12K2. 18K, 24K4WAY-VALVEBKRDRY-4WAYBLBLBKBKFUSE3.15ARY-FANRY-HEATERZNRCN-DC/DCRY-COMP34MAIN P.C.BBKYLMOTORR

(1) The function of main control1. Time delay Safety Control• 3min.; The compressor operation is delayed for 3 minutes to balance the pressure of cycl

4. Auto Operation (Electronic control mode)• The operation procedure is shown below. (Cooling & Heating Model)❋ If initial mode is decided, that m

Auto Operation for Dehumidification(only Heating Model)• The Setting temperature will be same that of the auto operation for cooling.- Compressor ON

5. Healthy Dehumidification• When the dehumidification operation input by the remote control is received, the intake air temperature isdetected and th

- 19 -6. Heating Operation Mode(only Heating Model)The unit will operate according to the setting conditions by the remote controller.The operation di

Functions... 3Produ

7. Cooling or Heating Mode with Sleep Mode Auto Control• When selecting the Cooling( ) or the Heating( ) combined with the Sleep Mode Auto Contro

- 21 -8. Forced OperationOperation procedures when the remote control can't beused.Open the front panel upward and move the Slide Switchto the Fo

• Cooling, Soft Dry, Fan, Heating• Sleep Mode• Timer Mode• Hot-start, Defrost• Compressor ON• BUZZER SOUND• Power Input or Reset : One short beep.• W

- 23 -InstallationIMPORTANT!Please read this instruction sheet completely before installing the product.This air conditioning system meets strict safe

(1) Installation Parts Provided(2) Installation of indoor, outdoor unitRead completely, then follow step by step.1) Select the best location 1. Indoor

3) How to fix installation plateThe wall you select should be strong and solid enough toprevent vibration1. Mount the installation plate on the wall w

(3) Flaring work and connectionof piping1) Flaring workMain cause for gas leakage is due to defect in flaringwork. Carry out correct flaring work in t

2) Connection of piping --Indoor Preparing the indoor unit's piping and drain hose forinstallation through the wall. Remove the plastic tubing

Tighten the flare nut with a wrench. When extending the drain hose at the indoor unit, installthe drain pipe.6. Wrap the insulation material around

3. Insert the connecting cable into the indoor unit. Don't connect the cable to the indoor unit. Make a small loop with the cable for easy conn

- 3 -FunctionsIndoor UnitOperation ON/OFF by Remote controllerSensing the Room TemperatureRoom temperature controlStarting Current ControlTime Delay S

Bundle the piping and drain hose together by wrappingthem with cloth tape over the range within which they fitinto the rear piping housing section.8

(4) Connecting the cable betweenindoor unit and outdoor unit1. Remove the cover control from the unit by loosen-ing the 3 screws.2. Dismount caps on t

Connection method of the connecting cable(Example)(1) Dismount two-caps on the conduit panel.(2) Make a hole appropriate for the passage of connection

Connect the cable to the indoor unit1. Connect the wires to the terminals on the controlboard individually according to the outdoor unitconnection.• E

(5) Checking the Drainage andforming the pipings1) Checking the drainage1. To remove the front panel from the indoor unit,remove the front panel from

(6) Air PurgingAir and moisture remaining in the refrigerant system haveundesirable effects as indicated below.• Pressure in the system rises.• Operat

Evacuation1. Connect the charge hose end described in the pre-ceding steps to the vacuum pump to evacuate thetubing and indoor unit.Confirm the &quo

(7) Test running1. Check that all tubing and wiring have been properlyconnected.2. Check that the gas and liquid side service valves arefully open.1.

- 38 -Operation (1) Name and Function-Remote Control (Cooling Models)Signal transmitter. Transmits the signalsto the room air conditioner.Remote Contr

- 39 -(2) Name and Function-Remote Control (Heat Pump Models)Signal transmitter. Transmits the signalsto the room air conditioner.Remote Controller O

- 4 -Healthy Dehumidification Operation Mode.( )Remote ControllerOperation ON/OFFResetOperation Mode SelectionTemperature SettingTimer Selection

- 40 -Disassembly of the parts (Indoor unit)Warning :Disconnect the unit from power supply before makingany checks.Be sure the power switch is set to

- 41 -2. To remove the Control Box.• Remove 2 securing screws. • Pull the control box out from the chassis careful-ly.3. To remove the Discharge Grill

- 42 -• Unhook the tab on the right inside of the chassisat the same time, slightly pull the evaporatortoward you until the tab is clear of the slot.

- 43 -Warning :Disconnect the unit from power supply before makingany checks.Be sure the power switch is set to “OFF”. To remove the Grille from the C

2. To remove the Control Box.• Remove 2 securing screws. • Pull the control box out from the chassis carefully.3. To remove the Discharge Grille.• Rem

- 45 -• Unhook the tab on the right inside of the chassisat the same time, slightly pull the evaporatortoward you until the tab is clear of the slot.

1. Trouble analysis1. Check temperature difference between intake and discharge air and operating current.Temp. DifferenceOperating CurrentTemp. diffe

- 47 -- 47 -2. Product does not operate at all.(* Refer to Electronic Control Device drawing and Schematic diagram.)Turn off Main PowerTurn on Main Po

- 48 -3. The product is not operate with the remote controller.Turn on Main PowerWhile the compressor has been stopped, the compressor does notoperate

- 49 -4. Compressor/Outdoor Fan are unable to drive.Turn on Main PowerOperate "Cooling Mode( )" by setting the desired temperature of th

- 5 -Product Specifications(Cooling Only)* Design and Specifications subject to change without prior notice for product improvement.Items UnitB/A-HMC0

- 50 -5. When Indoor Fan does not operate.Check connecting condition of the CN-MOTOR CON-NECTORDoes the voltage of terminal of CN-DC/DC CONNECTOR inIn

- 51 -• Confirm that the Vertical Louver is normally geared with the shaft ofStepping Motor.• If the regular torque is detected when rotating the Vert

- 52 -• The operation indicator of Indoor unit blinks five times.• The red indicator of Outdoor unit blinks five times.Check the connecting wires betw

- 53 -8. The phenomena in case of connecting errorINDOOR UNITConnector TypeConditionOpen and connecting errorOpenOpenOpenOpenShort between terminals(③

- 54 -OUTDOOR UNITConnector TypeConditionOPEN• PWB pattern is damaged when applying the power.Connecting reverselyConnecting reverselyOPENOPENOPENOPEN

9. Voltage of Connectors according to Indoor Fan Speed- 55 -1 2 3 443211 1431 2 3 4 52 3 4 5 62INDOORFANMOTORINDOOR PWB ASSYConnecting wiresbetween In

(1) MAIN PWB ASSY(Indoor Unit)• PWB ASSY SVC PART LIST- 56 -Electronic Control DeviceOJ1H, OJ2H : OPENOJ3H, OJ4H : Short1 24K Heating Model 6871A10035

- 57 -(2) MAIN PWB ASSY(Outdoor Unit)• PWB ASSY SVC PART LIST1 12K Heaing Model 6871A10036E 6.8K 5.1K 1K OPEN 39K O O O O O O2 12K Cooling Model 6871A

(3) DISPLAY PWB ASSY- 58 -<9K, 12K, 18K, 24K>(P/No: 6871A30009C)

1. Indoor Unit- 59 -Schematic Diagram64171216141513OperationCMPTimerSleep79811104653213731.24192223202118252629272830323335343650576261635958605654555

- 6 -Product Specifications(Cooling & Heating)Items Unit B/A-HMH12AS B/A-HMH18AS B/A-HMH24ASPower Supply ø, V, Hz 1, 115, 60 1, 230/208, 60 1, 230

2. Outdoor Unit- 60 -321IC9IC105TLP521-1BLTLP521-1BLCN-DC/DC4231470uF20VC054231823220VR71R7523.2K1%2K100uF25VC73+4R745.1K8729.4K20K34K1.06K1021-+-D92C

1. Indoor Unit (9K)- 61 -Exploded View and Replacement Parts List267110249951354212135312135311359011131410 733010342800268712152302159901263230268714

- 62 -Parts List(9K)LOCATION NO.PART NAMEHEAT CONTROLLERQ/TYPART NO B-HMC09AS131410 CHASSIS ASSY 2021-0188 1 R135311GRILLE ASSY,DISCHARGE(INDOOR)2020-

2. Indoor Unit(12K)- 63 -267110249951354212135312135311359011131410 733010342800268712152302159901-2159901-126323026871435215034681035211B135314146811

Parts List(12K)- 64 -LOCATION NO.PART NAMEHEAT CONTROLLERQ/TYPART NO B-HMC12AS B-HMH12AS131410 CHASSIS ASSY 2021-0189 1 1 R135311GRILLE ASSY, DISCHARG

- 65 -3. Indoor Unit(18K, 24K)131410267110249951135312135311354212359011733010342800268712152302159901-2159901-126323026871435215034681035211B14681113

- 66 -Parts List(18K, 24K)LOCATION NO.PART NAMEHEAT CONTROLLERQ/TYPART NOB-HMC18AS B-HMH18AS B-HMC24AS B-HMH24AS131410 CHASSIS ASSY 2021-0190 1 1 1 1

- 67 -550140554160567502552116561410553000552111437210559010546810549610554031261704W0CZZ430410552203-3552203-14372124355115522026499506687114. Outdoo

Parts List(9K, 12K)- 68 -LOCATION NO.PART NAMEHEAT CONTROLLERQ/TYPART NOA-HMC09AS A-HMC12AS A-HMH12AS552116 TUBE ASSY,REVERSING 2035-0034 1 R552202 VA

5. Outdoor Unit(18K)- 69 -552116649950561410554160567502447910549610550140552203-2552203-3435512437210559010546810668711552111W0CZZ5540312617044372124

(1) Indoor Unit- 7 -DimensionsDWHTubing hole coverTubing hole coverInstallation plateMODEL9K 12K 18K, 24KDIMW mm(inch) 802(31.6") 888(35.0")

Parts List(18K)- 70 -LOCATION NO.PART NAMEHEAT CONTROLLERQ/TYPART NOA-HMC18AS A-HMH18AS261704 TRANSFORMER, POWER 2012-0018 1 1 R430411BASE ASSY,WELD[O

6. Outdoor Unit(24K)- 71 -649950549610552111668711W0CZZ550140552203-3552203-1435511430411435512554031437212437210559010546810554160261704

Parts List(24K)- 72 -LOCATION NO.PART NAMEHEAT CONTROLLERQ/TYPART NOA-HMC24AS A-HMH24AS261704 TRANSFORMER,POWER 2012-0002 1 1 R430411BASE ASSY,WELD[OU

Specifications and performance data subject to change without notice.

- 8 -(2) Outdoor Unit 1. 9K, 12KWL2L3L1DHL4L5Gas side(3-way valve)Liquid side(2-way valve)MODEL9K, 12KDIM unitW mm(inch) 770(30.3)H mm(inch) 540(21.3)

- 9 -WL6 L5 L7 L8DL1L2L9L10L3L4HGas side3-way valveLiquid side3-way valve2. 18K, 24KMODEL18K, 24KDIMW mm(inch) 870(34.3)H mm(inch) 655(25.8)D mm(inch)