Haier HSU12VHJ(DB) Service Manual Download

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Domestic Air Conditioner

7.3.2 Indoor fan motor malfunction

Indoor display

E14

Method of

The rotation speed detected by the Hall IC during fan motor operation is used to determine

Malfunction

abnormal fan motor operation

Detection
Malfunction

when the detected rotation feedback singal don’t receiced in 2 minutes

Decision

Conditions
Supports curses

Operation halt due to breaking of wire inside the fan motor .

Operation halt due to breaking of the fan motor lead wires

Detection error due to faulty indoor unit PCB

How to check Fan Motor (DC)

1. Check connector connection.
2. Check motor power supply voltage output (pins 1-4).

3.    Check motor control voltage (pins 4-5).
4.    Check rotation command voltage output (pins 4-6).
5.    Check rotation pulse input (pins 4-7).

Notes:the a/c is electrifying,don’t pull out or insert the terminals of the

motor,else the motor would be damaged

Troubleshooting

* Caution

Be sure to turn off power switch before connect or disconnect connector,

or else parts damage may be occurred.

Turn off power supply and

rotate fan by hand

HSU12/18VHJ(DB)

Functions and control

Summary of Contents for HSU12VHJ(DB)

Page 1: ...cians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by...

Page 2: ...r unit Main functions and control specifications of outdoor unit Function of main thermistor 31 Value of thermistor 4 Service Diagnosis 54 Caution for diagnosis M 3 Error codes and description indoor display For 12K indoor unit For 18K indoor unit For 12 18K outdoor unit ...

Page 3: ...12 VHJ DB 101 101 102 106 ...

Page 4: ...t before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the discharging refriger...

Page 5: ...the welder in an enclosed room can cause oxygen deficiency 1 1 2 Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating the e...

Page 6: ...cified refrigerant R 410A R22 in the refrigerant system If air enters the refrigerating system an excessively high pressure results causing equipment damage and injury If the refrigerant gas leaks be sure to locate the leak and repair it before charging the refrigerant After charging refrigerant make sure that there is no refrigerant leak If the leak cannot be located and the repair work must be s...

Page 7: ...Caution Check to see if the parts and wires are mounted and connected properly and if the connections at the soldered or crimped terminals are secure Improper installation and connections can cause excessive heat generation fire or an electrical shock If the installation platform or frame has corroded replace it Corroded installation platform or frame can cause the unit to fall resulting in injury...

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Page 10: ...20 3380 1160 3530 7 9 52 12 7 16 0 20 6 35 6 35 SL 4 8 4 8 30 0 15 0 15 33 33 3 38 4 23 938x187x265 998x262x316 8 7 2 6 3 53 53 9 8 2 7 3 5 8 33 33 0 15 0 15 20 30 4 4 HSU18VHJ DB 12000 5000 14000 13400 4600 14000 18000 7500 20000 18650 6600 21000 5 27 2 2 5 86 5 46 1 93 6 15 4532 1006 2 4790 2 4696 1662 5290 SEER HSPF 17 9 5 15 15 10 10 10 10 HSU12 18VHJ DB 9 8 2 7 3 5 8 46 43 40 46 43 40 46 43 3...

Page 11: ...3 5 53 31 6 4 9 4 8 1090 1050 20 26 80 80 650 ESTER OIL VG74 900 FV50S Rotary Compressor SNB130FGYM2 49 63 59 643x783x255 699X915X325 53 88 18 99 8 1115 31 6 1115 31 6 1115 31 6 1115 0 37 Rotary Compressor DA89X1C 20FZ HSU12 18VHJ DB oz 80 F 67 F 95 F 75 F 70 F 60 FWB 47 F 47 F Ib Ib ...

Page 12: ...27 Connector for fan feedback 5 CH1 Connector for power L wire 6 CON2 Connector for power N wire 7 CON7 Connector for communicate wire 8 CN30 Connector for transformer input 9 CN31 Connector for transformer output 10 CN32 Connector for display board Note Other designations PCB 1 INdoor Control PCB 1 CN48 Connector for Forced operation ON OFF switch 2 J1 Select 25 or 35 3 LED1 communicate display l...

Page 13: ...Domestic Air Conditioner PCB 1 CN31 CN11 CN1 CN32 CN26 CN27 CON2 CN30 CON12 CON8 CH1 10 HSU12 18VHJ DB ...

Page 14: ...for power N wire 5 CON1 Connector for power L 6 CN32 Connector for display board 7 C0N6 C0N8 Connector for ions generator 8ĐC0N7 Connector for communicate between the indoor board and the outdoor board Note Other designations PCB 1 INdoor Control PCB 1 CN48 Connector for Forced operation ON OFF switch 2 J1 Select 25 or 35 3 LED1 communicate display light 4 RV1 Varistor 5 FUSE1 Fuse 3 15A 250VAC FO...

Page 15: ... Domestic Air Conditioner PCB 1 CN26 CON1 CON2 CN11 CN32 CN1 CN48 CON8 CON6 CON7 12 HSU12 18VHJ DB ...

Page 16: ...N25 CN8 Connector for the L N to the module board 10 CN4 Connector for communicate between the indoor board and the outdoor board 11 CN26 Connector for capacitance anode 12 CN24 Connector for capacitance cathode PCB 2 module PCB CN10 Connector for the DC power 5V and 15V form the control PCB CN11 Connector for communicate between the control board and the module board P CN1 N CN5 Connector for cap...

Page 17: ...Domestic Air Conditioner PCB 1 CN2 CN1 CN4 CN8 CN25 CN26 CN24 CN23 CN22 CN17 CN18 CN19 CN20 CN16 CN21 CN10 CN3 14 HSU12 18VHJ DB ...

Page 18: ...Domestic Air Conditioner PCB 2 CN1 CN2 CN3 CN4 CN5 CN6 CN7 CN11 CN10 15 HSU12 18VHJ DB ...

Page 19: ...Connector for the L N to the module board 10 CN4 Connector for communicate between the indoor board and the outdoor board 11 CN26 Connector for capacitance anode 12 CN24 Connector for capacitance cathode PCB 2 module PCB CN10 Connector for the DC power 5V and 15V form the control PCB CN11 Connector for communicate between the control board and the module board P CN1 N CN5 Connector for capacitance...

Page 20: ... Domestic Air Conditioner PCB 1 CN2 CN1 CN4 CN8 CN25 CN26 CN24 CN23 CN22 CN17 CN18 CN19 CN20 CN16 CN21 CN10 CN3 17 HSU12 18VHJ DB ...

Page 21: ... Domestic Air Conditioner PCB 2 CN1 CN2 CN3 CN4 CN5 CN6 CN7 CN11 CN10 18 HSU12 18VHJ DB ...

Page 22: ...ume when it is set automatic When the wind volume is automatic it can be switched between strong medium and weak according to the temperature adjusting levels Wind volume under the automatic wind volume mode Temperature adjusting levels A B C D E F G H I Heating Strong Strong Strong Strong Strong Medium Weak Weak SLO cooling Strong Strong Strong Medium Medium Weak Weak Weak Moisture removing Stron...

Page 23: ...e compressor starts again in order to avoid cold wind warm boot wind volume control should be done Heat exchange temperature THHOT3喈37ć THHOT2喈35ć喉 THHOT1喈25ć喉 THHOTR喈23ć 4 minutes Stop weak setting weak stop To control the indoor fan motor as shown in the table above according to the heat exchange temperature The fan motor stops when the heat exchange temperature is below 25ć The fan motor is wor...

Page 24: ...ing When the running mode is turned to automation after starting the system the system will first determine the running mode according to the current room temperature and then will run according to the determined mode Tr in the following selection conditions means room temperature Ts means setting temperature Tp means temperature of indoor coil pipe Tr 23 Choose Cooling Mode ć Tr 23 Choose Heating...

Page 25: ...ter the compressor is on The wind volume will be kept SSLO within 20 seconds after the compressor stops and then changes to weak Under the Silent cooling mode the wind volume is SSLO There is no silent mode for moisture removing and wind sending 5 1 3 3 Air cleaning If the fan motor starts working after receiving the remote control order the aion generator starts working and sends out ions The ion...

Page 26: ...decrease the about 4 again and after 3 hours it will increase about 2 and after other 3 hours it will cease 5 1 3 6 Trial running The indicated frequency for trial running is 58Hz wind volume is strong The trial running will last for 30 minutes and then the unit will be powered off The unit will exit the trial running if it receives any remote control signal during the trial running period There i...

Page 27: ...ed Cooling When receiving the instruction of indoor unit rated operation the unit will start rated cooling operation Rated Heating When receiving the instruction of indoor unit rated operation the unit will start rated heating operation 24 HSU12 18VHJ DB ...

Page 28: ...te Frequency will be immediately decreased under the condition that outdoor unit air discharge temperature overheating protection is activated or over current of compressor then the compressor will operate towards target frequency This process does not exist in normal operation of unit Heating When completing compressor startup operation it will operate as per frequency of indoor unit After 2 minu...

Page 29: ... defrosting process for details Time sequence of the defrosting operation is as follows Four way Valve Work Status in Other Modes In heating mode four way valve is on If compressor is off or is switched to non heating mode four way valve ensures that it is off at least 2 minutes after compressor shuts down 5 2 4 Outdoor Defrosting Control Defrosting Mode Entry Conditions The unit will enter defros...

Page 30: ... the rule for defrosting startup The unit will exit defrosting mode and handle fault in the event of 3 consecutive restart failures On entering defrosting it must guarantee that compressor will operate for a minimum of 2 minutes in defrosting mode before exit Defrosting Exit Condition When one of the following conditions is met defrosting operation will be switched to heating operation 1 Temperatu...

Page 31: ...12 Slow frequency drop 1HZ 10s 108 Invariable frequency 105 Frequency rise 1HZ 10s 98 Frequency rise 1HZ 1 s When TD 117 for 20s continuously ć ˈair discharge overheat protection will be activated and fault will be reported to indoor unit It will not continue in other conditions 5 2 6 3 Indoor Heat Exchanger Anti freeze Protection Anti freeze during cooling 9ć 1Hz 10sec 6ć 5ć 0ć When TC 5ćˈcompres...

Page 32: ...oling signal cooling operation will start in a frequency signaled by indoor unit Only air discharge temperature and over current protection features are effective and other protection features are invalid 2 Rated Middle and Minimum Capacity Operation When receiving indoor rated middle and minimum capacity operation signal outdoor unit will operate as per wind speed and frequency set by EEPROM and ...

Page 33: ...f the inner temperature of the compressor rises abnormally the operating frequency drops or the operation halts Indoor heat exchange sensor 1 The indoor heat exchanger thermistor is used for controlling target discharge temperature The system sets a target discharge temperature according to the outdoor and indoor heat exchanger temperature and controls the electronic expansion valve opening so tha...

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Page 50: ...y Hint Operation mode AUTO FAN COOL DRY Remote controller HEAT LOW HI MED AUTO If pressed the other buttons will be disabled Press it once again lock will be cancelled 30 LOCK button When the remote RESET button controller appears abnormal use a sharp pointed article to press this button to reset the 1 Control the lightening and the indoor extinguishing of LED display board remote controller norma...

Page 51: ...left or It is advisable not to keep horizontal flap at downward position for a long time in COOLor DRY otherwise condensate water might occur conditioner temperature is below 60 o F do not use it in the Test operation Use this switch in the test operation when the room normal operation your finger from the switch the cooling Continue to press the test operation switch for more than 5 seconds After...

Page 52: ...AT mode Decreases about 4O F 1 hr 2 3 In HEAT mode 1 hours after SLEEP mode starts temp will become about 4O F lower than temp setting After another 1 hours temp decrease about 4 O F further After more another 3 hours temp rises about 2O F further The unit will run for further 3 hours then stops Temp is lower than temp setting so that room temperature won t be too high for your sleep In AUTO mode ...

Page 53: ...d dry using the air conditioner for a long time under the high air humidity a phenomenon falling water occurs at the grille 3 The cancel of the health airflow function Press the button of health airflow again the unit goes on working under the condition before the setting of health airflow function Notice Cannot pull direct the flap by hand Otherwise the grille will run incorrectly If the grille i...

Page 54: ...r serious stains use a neutral detergent diluted with water Wring the water out of the cloth before wiping then wipe off the detergent completely Indoor Body Once every two weeks 1 Open the lnlet Grille 2 Detach the standard air filter 3 Attach Air Purifying Filter 4 Attach the standard air filter Necessary installation 5 Close the Inlet Grille Close the Grille surely Slide the knob slightly upwar...

Page 55: ...IBITION PROHIBITION PROHIBITION Do not start or stop the operation by disconnecting Do not channel the air flow directly at people especially at infants or the aged Do not try to repair or reconstruct by yourself Do not use for the purpose of storage of food art work precise equipment breeding or cultivation CAUTION Take fresh air occasionally especially when gas appliance is running at the same t...

Page 56: ... the air conditioner immediately until 3 minutes have Cautions 3 If the fuse of indoor unit on PC board is change it with the type of T 3 15A 250V outdoor unit is broken change it with the type of T 25A 250V Do not obstruct or cover the ventilation conditoner Do not put fingers inlet outlet and swing louver Do not allow children to play with the air conditioner case should children be allowed to s...

Page 57: ...ck to make sure that the indoor PCB is broken Operation sometimes stops Check the power supply A power failure of 2 to 10 cycles can stop air conditioner operation Equipment operates but does not cool or does not heat only for heat pump Check for faulty operation of the electronic expansion valve Set the units to cooling operation and compare the temperatures of the liquid side connection pipes of...

Page 58: ...3 Overcurrent protection of AC electricity for the outdoor model 4 Communication fault between the IPM and outdoor PCB Page 73 6 Power voltage is too high or low Page 81 8 Overheat protection for exhaust temperature Page 75 9 outdoor fan motor malfunction 10 Frost removing temperature sensor failure Page 74 11 SUCK temperature sensor failure Page 74 12 Ambient temperature sensor failure Page 74 13...

Page 59: ...sed Ƶ Faulty connector connection Causes Ƶ Faulty thermistor Ƶ Faulty PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred Thermistor resistance check method Remove the connector of the thermistor on the PCB and measure the resistance of thermistor using tester The relationship between normal temperature and resist...

Page 60: ...ing of the fan motor lead wires Ƶ Detection error due to faulty indoor unit PCB How to check Fan Motor DC 1 Check connector connection 2 Check motor power supply voltage output pins 1 4 3 Check motor control voltage pins 4 5 4 Check rotation command voltage output pins 4 6 5 Check rotation pulse input pins 4 7 Notes the a c is electrifying don t pull out or insert the terminals of the motor else t...

Page 61: ... of fan motor connector Is motor power voltage DC310V NO Yes Replace indoor unit PCB Replace fan motor Stop fan motor Is rotation number command pulse generated Is motor control power voltageDC15Vgenerat Is rotation number commamd voltage DC1 6V NO Yes Yes No No Y Replace indoor unit PCB Replace fan motor Replace indoor unit PCB Replace indoor fan motor PCB HSU12 18VHJ DB Functions and control 58 ...

Page 62: ...onnect connector or else parts damage may be occurred Check the IPM module method Disconnect the compressor harness connector from the outdoor unit PCB To disengage the connector press the protrusion on the connector Then to measure resistance between P andN and the U V and W terminals of the compressor connector with a multi tester Evaluate the measurement results for a pass fail judgment N termi...

Page 63: ...e is broken Ƶ Communication wiring disconnected Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred NO NO YES Are they good 1 Pull out and reinsert the terminals 2 Replace connected wire 1 Check whether Terminal CN23 and CN22 on the outdoor mainboard CN10 and CN11 on IPM module 2 Check whether the connected wire betwe...

Page 64: ...hermistor input voltage to the microcomputer Malfunction A thermistor error is detected by checking the temperature Detection Malfunction The thermistor input is above 4 9V or below 0 1V with the power on Decision Conditions Note The values may vary slightly in some models Supposed Ƶ Faulty connector connection Causes Ƶ Faulty thermistor Ƶ Faulty PCB Troubleshooting Caution Be sure to turn off pow...

Page 65: ...tor or else parts damage may be occurred YES NO the temperature exceeds 110 shortly ć after the machine 1 The cryogen may have been leaked during installation or there may be leakage in the piping system 2 There may be other causes to make the exhaust temperature too high Electrify the machine again and turn it on with the remote controller then measure the temperature at the exhaust temperature s...

Page 66: ...f power switch before connect or disconnect connector or parts damage may be occurred YES NO Pull out the exhaust sensor and measure its resistance at standard temperatures according to the resistance temperature table NO The sensor is damaged Replace the sensor with a new one the results deviate much YES The sensor is damaged Replace the sensor with a new one The outdoor mainboard is damaged and ...

Page 67: ... outdoor unit signal transmission error due to wiring error Causes Ƶ Faulty PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred NO A Restart the a c and it becomes normally If starting up normally but malfunction occurs again after a while Check whether the linking cable between the indoor and outdoor is well conn...

Page 68: ...ns 1 and 3 on the terminal of outdoor unit with a multimeter If 230VAC is available but 310DC not the power module is damaged replace it with a new one Test the outdoor power supply 230VAC and 310VDC with a multimeter The outdoor mainboard is damaged replace it with a new one The indoor mainboard is damaged replace it with a new one If the value varies between 0 and 80 VAC the outdoor mainboard is...

Page 69: ...Supposed Ƶ Supply voltage not as specified Causes Ƶ the IPM module is broken Ƶ the outdoor PCB is broken Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred About how to check the IPM module please refer to IPM protection fault This question may be caused by the power Change the new one Change the outdoor PCB Check th...

Page 70: ...tion Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Malfunction unsolved YES YES NO 1 The wiring of compressor is incorrect or the connection is poor 2 The compressor is damaged IPM Module is damaged and needs replacing At frist the compressor start up soon the compressor stopped with the LED1 on the outdoor PCB blinks 1Hz for 19 times the M...

Page 71: ...lustrated in the above gure Before inserting power plug into receptacle check the voltage without fail The power source is the same as the ƽ corresponding name plate Install an exclusive branch circuit of the power ƽ A receptacle shall be set up in a distance where the power cable can be reached Do not extend the cable by cutting it ƽ Selection of Installation Place Power Source Please be subject ...

Page 72: ...ain hose into the dent of heat insulation materials of indoor unit 2 Insert the indoor outdoor electric cable from backside of indoor unit and pull it out on the front side then connect them 3 Coat the Àaring seal face with refrigerant oil and connect pipes Cover the connection part with heat insulation materials closely and make sure xing with adhesive tape Fixing the indoor unit body Hang surely...

Page 73: ...nit A B A B Outdoor unit Indoor unit Oil trap CAUTION Max Elevation Amax 15m Ɣ In case the elevation A is more Ɣ than 5m oil trap shoud be installed every 5 7m Max Length Bmax 25m Ɣ In case the pipe length B is Ɣ more than 10m the refrigerant should be charged according to 20 g m Use the same method on indoor unit Loosen the screws on ƽ terminal block and insert the plugs fully into terminal block...

Page 74: ...0mm rth leakage breaker 4 Flare pipe Lean Damage of Àare Crack Partial Too outside Correct Incorrect On Drainage It becomes high midway The gap with the ground is too smaO l There is the bad smell from a ditch It waves The end is imm ersed in water Please install the drain hose so as to be downward slope without fail Please don t do the drainage as shown below ƽ ƽ Please pour water in the drain pa...

Page 75: ...e r u d e c o r P p e t S 1 Features 2 Remove the front panel 1 Hold the front panel by the tabs on the both sides and lift it until it stops with a click 2 Open the front panel to the horizontal position Release the both sides pivots and remove the front panel When assembling align the right and left axes with grooves in turn and insert them to the end 9 1 For 12K Indoor unit HSU12 18VHJ DB 72 ...

Page 76: ...Removal Procedure s t n i o P e r u d e c o r P p e t S 3 Pull the front panel out horizontally and remove it 6812 VHJ DB 73 ...

Page 77: ... Procedure 9 1 2 Removal of Air Filter s t n i o P e r u d e c o r P p e t S upwards slightly and then pull it out downwards Insert the air when installing When installing insert 2 hooks of the 6812 VHJ DB 74 ...

Page 78: ...ocedure 9 1 3 Removal of the blade s t n i o P e r u d e c o r P p e t S Release the marked hooks Pull out and remove the blade Insert the air when installing When installing insert 2 hooks of the 6812 VHJ DB 75 ...

Page 79: ...Removal Procedure 9 1 4 Removal of Front Case s t n i o P e r u d e c o r P p e t S 1 Release the screw covers 2 Loosen the 2 6812 VHJ DB 76 ...

Page 80: ...Removal Procedure s t n i o P e r u d e c o r P p e t S 3 Loosen the marked hooks 4 Pull out the front case 6812 VHJ DB 77 ...

Page 81: ...f Vertical Blades and Display Board s t n i o P e r u d e c o r P p e t S 1 Pull out the Vertical Blades 2 screws and remove the display board 3 Loosen the screw of the drip proof plate Lift and remove the electrical box 6812 VHJ DB 78 ...

Page 82: ... P p e t S 1 Loosen the 2 screws 2 Pull out the drain pan 3 Loosen the screw of the drip proof plate Lift and remove the electrical box Discharge the static electricity from your body before touching the electrical parts like signal receiver PCB It may cause the malfunction of PCB 6812 VHJ DB 79 ...

Page 83: ...an Motor and Heat Exchanger s t n i o P e r u d e c o r P p e t S 1 Remove the right side plate 1 Loosen the 2 screws 2 Remove the 3 Lift up the evaporator Be careful not to evaporator 3 Remove the fan 1 Loosen the 2 screws 6812 VHJ DB 80 ...

Page 84: ...Removal Procedure s t n i o P e r u d e c o r P p e t S 2 Lift up the right part of the fan motor and slide it to the rightward to remove 3 Lift up the right part of the fan and remove it 6812 VHJ DB 81 ...

Page 85: ...e of front grille when the panels are closed Slide the front panel side to side to release each axis When assembling align the right and left axes with grooves in turn and insert them to the end 1 Open the front panel to the horizontal position Release the both sides pivots and remove the front panel Removal Procedure 9 2 For 18K indoor unit 9 2 1 Removal of Front Panel HSU12 18VHJ DB 82 ...

Page 86: ...ightly and then pull it out downwards Insert the air filters along grooves when installing When installing insert 2 hooks of the air filter completely Step Procedure Points Removal Procedure 9 2 2 Removal of Air Filter 6812 VHJ DB 83 ...

Page 87: ...ocedure Points 1 Remove the horizontal blade The horizontal blade is single Installation procedure 1 Since key pattern hook is provided rotate the blade and fit it to the left pivot first 2 Fit the blade to the right pivot 3 Fit the blade to the center pivot 1 Release the center pivot 2 Bend the horizontal blade slightly and remove it Removal Procedure blade 6812 VHJ DB 84 ...

Page 88: ...n assembling install the front grille horizontally so as not to stuff the flap inside When assembling make sure the three hooks are caught prop e rly Step Procedure Points Removal Procedure Loosen the marked five screws 2 6812 VHJ DB 85 ...

Page 89: ...all power supplies before disassembling work Step Procedure Points Remove the front grille Remove the assembly of the reduction motor 1 Remove the Drain pan 1 Loosen the marked screws under the screw covers Loosen the marked 3 Lift up and remove 2 Removal Procedure hooks the drain pan 6812 VHJ DB 86 ...

Page 90: ...dure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 2 Push the hooks on the Removal Procedure back of the vertical blades and remove Loosen the marked 1 screws 6812 VHJ DB 87 ...

Page 91: ...ling work Step Procedure Points Remove the front grille Discharge the static electricity from your body before touching the electrical parts like signal receiver PCB It may cause malfunction of PCB 1 Remove the electrical box 1 Loosen the screw of the drip proof plate 2 Lift and remove the drip proof plate Removal Procedure 6812 VHJ DB 88 ...

Page 92: ... refrigerant cycle Contaminating of air or other gas causes abnormal high pressure in refrigerating cycle and this results in pipe breakage or personal injuries Pay attention so that the residual water in the drain will not make the floor wet In case that a drain hose is buried inside a wall remove it after the drain hose in the wall is pulled out Use two wrenches to disconnect pipes When disconne...

Page 93: ... to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Loosen the screws 2 Remove the right side plate Removal Procedure 9 2 8 Removal of Heat Exchanger 6812 VHJ DB 90 ...

Page 94: ...9 3 1 Removal of Outdoor Panel 9 3 For 12 18K Outdoor unit Removal Procedure HSU12 18VHJ DB 91 ...

Page 95: ...Loosen the top panel screws 1 2 Lift the top panel HSU12 18VHJ DB Removal Procedure 92 ...

Page 96: ...Domestic air conditioner Removal Procedure Loosen the csrews and pull the panel HSU12 18VHJ DB 93 ...

Page 97: ...9 3 2 Removal of Electrical Box HSU12 18VHJ DB Removal Procedure 94 ...

Page 98: ...9 3 3 Removal of Fan and Fan Motor HSU12 18VHJ DB Removal Procedure 95 ...

Page 99: ...2 Loosen the fixing screws and remove the motor HSU12 18VHJ DB Removal Procedure 96 ...

Page 100: ...9 3 4 Removal of fan motor Bracket and Partition HSU12 18VHJ DB Removal Procedure 97 ...

Page 101: ...and remove the reactor Loosen the screw HSU12 18VHJ DB Removal Procedure 98 ...

Page 102: ...Loosen the marked screws and pull out the backgurd 9 3 5 Removal of Computor and Heat Exchanger HSU12 18VHJ DB Removal Procedure 99 ...

Page 103: ...4 Remove the compre ssor and pipe assay 5 Remove the conden ser HSU12 18VHJ DB Removal Procedure 100 ...

Page 104: ... SSHQGL SSHQGL 3LSLQJ LDJUDPV 68 9 101 ...

Page 105: ...10 2 Wiring Diagrams 10 2 1 INDOORUNIT FOR12K 1 RECEIVER DISPLAY RWWHG OLQH IUDPH LV RSWLRQDO 77 17 21 2 5 1 5 52 1 7 5 5 8 Appendix HSU12 18VHJ DB 102 ...

Page 106: ...CN48 CN32 CN11 CN1 PIPING TEMP SENSOR AMBIENT TEMP SENSOR RECEIVER DISPLAY CN32 RECEIVER DISPLAY 7 2 5 1 5 5 8 LOUVER MOTOR 72 287 225 81 7 Y G CON2 CON1 CON7 T3 15A 250V AC FUSE W R B CON8 CON6 R W Y G ION GENERATOR Appendix HSU12 18VHJ DB 103 ...

Page 107: ...the dotted parts are optional for different unit WR GRXEOH ZD DLU H FKDQJH PRWRU DLU H FKDQJH PRWRU WR VLQJOH ZD 5267 7 03 6 1625 TEMP SENSOR TEMP SENSOR 2035 6625 6 5 7 03 6 1625 1 02725 1 9 FUSE2 1 OHFWULF HDWLQJ DEOH TO INDOOR UNIT 7 50 1 2 32 5 1 HVFULSWLRQ ODVK 7LPHV 2XWGRRU 3520 HUURU 7KH SURWHFWLRQ RI 30 RPPXQLFDWLRQ IDXOW 2YHUFXUUHQW SURWHFWLRQ 2YHUKHDW SURWHFWLRQ IRU 2YHU SUHVVXUH RU 2YHU...

Page 108: ... parts are optional for different unit WR GRXEOH ZD DLU H FKDQJH PRWRU DLU H FKDQJH PRWRU WR VLQJOH ZD 5267 7 03 6 1625 TEMP SENSOR TEMP SENSOR 2035 6625 6 5 7 03 6 1625 1 02725 1 9 FUSE2 1 OHFWULF HDWLQJ DEOH TO INDOOR UNIT 7 50 1 2 32 5 1 HVFULSWLRQ ODVK 7LPHV 2XWGRRU 3520 HUURU 7KH SURWHFWLRQ RI 30 RPPXQLFDWLRQ IDXOW 2YHUFXUUHQW SURWHFWLRQ 2YHUKHDW SURWHFWLRQ IRU 2YHU SUHVVXUH RU 2YHUKHDW HYLDW...

Page 109: ...10 3 Circuit Diagrams 10 3 1 INDOORUNIT FOR12K Appendix HSU12 18VHJ DB 106 ...

Page 110: ...10 10 CN11 1 2 3 4 5 CN12 1 2 3 4 5 CN13 R206 1K R18 2K 1 2 CN48 C8 0 1uF FLZ R47 3 3K R73 10K RST 1 2 JP2 TJC8 02 1 2 3 4 5 CN5 R136 4 7K 1 C14 1nF R135 1K E16 4 7uF 50V D31 RLS4148 5V E17 4 7uF 50V R138 1K R137 390K C17 0 01uF 5V GG KZ KZ GG 5V R46 100K R14 1K E19 47uF 50V C26 1nF 1 2 3 CN2 humidity XT1 HXF OUT DCF R96 3 3K J1 R100 1K R103 1K P3_3 SSI 1 P3_4 SDA SCS 2 MODE 3 P4_3 XCIN 4 P4_4 XCO...

Page 111: ... 3 IC4 TLP421 15V 47uF 50V 105ć 5 10K Q 5 5V 1 2 3 4 5 6 7 CN26 4 7uF 50V 105ć X D1 1N5399 2 2nF 250V 1 1 4 4 2 2 3 3 LX1 LB2271 32mH 0 35A 2 2nF 250V 220V N 220V L 1 2 3 4 5 1 12V R110 470ȍ 1 66 7 R111 10K D23 RLS4148 D22 RLS4148 D21 RLS4148 D20 RLS4148 R112 470ȍ 1 66 7 R113 10K R114 470ȍ 1 66 7 R115 10K R116 470ȍ 1 66 7 R117 10K 12V 1 2 3 CN49 FLZ FLZ 3 3 4 4 2 2 1 1 1 12V 1 21 3 4 2 1 3 1 21 22...

Page 112: ...C N BLACK WHITE FUSE1 T25A 250VAC RV1 S14K350 R1 1M R12 100 1W CX1 225 275V L1 8MH 20A RV2 S14K350 RV3 S14K350 CX2 225 275V PTC1 470N CY1 472 250V 275V CY2 472 250V 275V CY3 103 250V 275V CY4 103 250V 275V 1 CN3 PE SA1 RA 362M K5 12V 25A 891P 1A C K3 12V 5A 892H N 1AC C K4 12V 5A 892H N 1AC C K2 12V 5A 892H N 1AC C K1 12V 5A 892 1CC C 1 2 3 CN10 CX4 103 275V 1 2 3 4 5 6 7 8 9 CN12 1 2 3 4 5 CN13 S...

Page 113: ...1W 15V R32 5 1K 1 R30 1K R28 5 1K 1 R31 1K C5 104 50V R25 10K R26 1K R16 2 1W R14 100K 2W R15 15 C4 103 50V 9 10 5VD T1 E22034 7 6 4 5 CY8 472 1KV R27 10K 1 3 R24 5 1K 1 CX5 104 275V ADJ 1 FB 2 CS 3 GND 4 HV 8 NC 7 VCC 6 DRV 5 IC1 NCP1200P100 D9 MUR115 MUR130 ER106 D10 ER106 D8 MBR3100 ER302 4 3 1 2 IC2 PC817A R20 220 R21 220 M1 IRFUC20 1 2 3 CN22 J11 R90 0 N P 1 2 3 4 A B C D 4 3 2 1 D C B A 1 CN...

Page 114: ... WHITE FUSE1 T25A 250VAC RV1 S14K350 R1 1M R12 100 1W CX1 225 275V L1 8MH 20A RV2 S14K350 RV3 S14K350 CX2 225 275V PTC1 470N CY1 472 250V 275V CY2 472 250V 275V CY3 103 250V 275V CY4 103 250V 275V 1 CN3 PE SA1 RA 362M K5 12V 25A 891P 1A C K3 12V 5A 892H N 1AC C K4 12V 5A 892H N 1AC C K2 12V 5A 892H N 1AC C K1 12V 5A 892 1CC C 1 2 3 CN10 CX4 103 275V 1 2 3 4 5 6 7 8 9 CN12 1 2 3 4 5 CN13 ST COM 1 C...

Page 115: ...1W 15V R32 5 1K 1 R30 1K R28 5 1K 1 R31 1K C5 104 50V R25 10K R26 1K R16 2 1W R14 100K 2W R15 15 C4 103 50V 9 10 5VD T1 E22034 7 6 4 5 CY8 472 1KV R27 10K 1 3 R24 5 1K 1 CX5 104 275V ADJ 1 FB 2 CS 3 GND 4 HV 8 NC 7 VCC 6 DRV 5 IC1 NCP1200P100 D9 MUR115 MUR130 ER106 D10 ER106 D8 MBR3100 ER302 4 3 1 2 IC2 PC817A R20 220 R21 220 M1 IRFUC20 1 2 3 CN22 J11 R90 0 N P 1 2 3 4 A B C D 4 3 2 1 D C B A 1 CN...

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