SERVICE MANUAL - Masterxoloda.ru
Contents
1. 12 5 LIST DN sans ent et 1 emen 220020 L a 5 pee 7 7 L wo po y Wewmrwewsy 2225069 7 07 7 T 7 01 7 7 5 s 7 s 5 5 NEN EL NUN x NOM NN NIE EG NEN NN pom NC z En NX 20 21 22 23 24 43 12 5 LIST 44 12 5 LIST KFR 3502G BPE Key Description Part No Q ty 1 Front Panel RZA 2 1601 006 XX 0 1 2 Display Frame RZA 2 2306 005 XX 0 1 3 ornament grille RZA 2 1501 010 XX 0 1 4 Grille RZA 2 1501 009 XX 0 1 5 Air Filter RZA 0 2305 007 XX 0 2 6 Vane Plate RZA 2 2478 102 XX 0 3 7 Vane RZA 2 1523 015 XX 0 12 8 Vane Lever RZA 2 1514 027 XX 0 2 9 Flap RZA 2 1523 013 XX 0 1 10 Drainage Hose Ass y 852 0 1303 221 XX 0 1 11 Stepper Motor 529 0 0000 062 0A 0 1 12 Air Outlet Frame RZA 2 1504 022 XX 0 1 13 Evaporator Ass y RZA 0 4116 064 XX 0 1 14 Indoor Temperature Sensor RZA 0 5259 051 XX 1 1 15 Evaporator Supporter RZA 2 2219 019 XX 0 1 16 Water Plate RZA 2 2326 105 XX 0 1 17 Bearing Housing Ass y RZA 0 2510 128 00 1 1 18 Cross Flow Fan RZA 0 2509 104 XX 0 1 19 Fan Motor RZA 0 0000 055 XX 0 1 20 Motor Supporter RZA 2 1514 020 XX 0 1 21 Motor Cover RZA2. BALLU SPLIT TYPE INVERTER AIR CONDITIONER SERVICE MANUAL KFR 3601GW BPE KFR 4001GW BPE KFR 3502GW BPE CONTENTS 1 NAMES AND FUNCTIONS 2 3 OUTLINES AND DIMENSIONS 4 WIRING DIAGRAM 5 REFRIGERANT SYSTEM DIAGRAM B PERFORMANCE DATA I GCGONIROL MODE O IROBDBEESHOOTINIS 9 SERVICE FLOW CHART 10 SENSOR PARAMETER 11 DISASSEMBLY INSTRUCTIONS 12 PARTS LIS Testnet tatis PART NAMES AND FUNCTIONS KFR 3601G BPE KFR 4001G BPE e INDOOR UNIT Indoor coil sensor inside Air filter Air fresh filter Switch button Front cover VFD screen Air inlet grille Horizontal Vane Air outlet Power plug Vertical Vane KFR 3601W BPE KFR 4001W BPE OUTDOOR UNIT Air inlet rear and side Tubes and cable Drainage hose Air outlet NS lt hole bottom 1 PART NAMES AND FUNCTIONS KFR 3502G BPE INDOOR UNIT Air inlet Air filter 2
3. z 20 6 427 2 112 9 22 82 08 021 2 712 297 d d 84 41 37 8 10 55 1 10 SENSOR THE PARAMETER OF THE DISCHARGE SENSOR N o3 lt cN 4 lt lt N NI OF ON N N lt H N N gt N Of st CO CN CO Of O O O COL OF O O O O O O CN gt ol ool OI MI 00 CO has o O O Of NM cO CN N Mm CN O CO O OO 6 st Ss ST gt Sf CO NI Or lt CO NM pl C NM lt w O ol MI Nl O O O CN lt st O MB NM oO Ol O ham NALS ex ex N ex N o ex EN AT N N SY co col O O lt COL N OY CO CO lt lt N lt co N NI N N N NI NI D Ol N MB OO O O lt NI O O O TIN N O O lt NI o gt tS RE RE I RE RE RE
4. ace it T Connect the indoor all the Tead Nae and outdoor unit ors Arg res connect ed agai n accor di ng to 9 board troubl e bet ween indoor and repl ace it condi t i on out door uni t Yes the wri ng di agr am Repl ace t he out door Is the system Loes the power Yes control board and in good Yes indicator of start up again condi t i on board trouble out door cont r ol board i ght up 15 PMboar d Nornal protect i on short circuit and repl ace f use Yes Repl ace PMboar d and fuse 15 out door control board short circuit Is the fuse of 3 15A blown Qurdoor control board troubl e and replace it The control systemof out door unit has short circuit troubl e check the connect i on filter board out door cont rol board PMr ect i fi er and el ect rol yse capaci t or Is the fuse of 20A blown repl ace t he troubl e unit Is t he react or and filter Yes Repl ace t he board open troubl e unit circuit Does t he rectifier have the alternating current input Rectifier trouble Yes and replace it Is the vol t age input of startup Yes resistor correct The startup resistor s over hot Repl ace it The I PMcont and There hae 0 Short vave filter board Repl ace t he circuit behi nd
5. ace it Qt door t enper at ure sensor trouble and ace it door cont rol Yes board troubl e and replace it Is the resi st ance of sensor correct door t enper at ure sensor troubl e and ace it 28 9 SERVICE FLOW CHART KFR 3502G BPE Indoor electric control P C Board Fan motor TO Display panel Flap motor Fan feedback CN17 Display panel pouer in Indoor sensor LEUD Emme Jo p 196 Fuse 2500 3 158 o 50000000 oo Q 309 8 220 240U Tansformer primary 5 Coil sensor Power input AC 220 240U 0090005 0600900002000 Js T oe 10 of 16 L10 6 o o caf Ck 193 H C d 19 Communication 1602 ROI 0037001 e V9 E cos 509 o 6 R16 Rit Ris 09 012 011 a Pim Tansformer primary 29 9 SERVICE FLOW CHART KFR 3601G BPE Indoor electric control P C Board von 99 00000000000000000900000000009000 80 Transformer primary 80220 2400 Display panel Fan capacitor Fan motor Commiunication lt Euh Qo A lt gt AC 220 2400 in mE NO a o AC 220 240U out ER 29000000 208 _ On Coil sensor 18 9 eu a WAT ACON 26900009 Indoor sensor displau pa
6. ol co of ol col of CO lt O O N N Nc cN lt gt ol O CO CO O lt lt N oO O lt ON TT lt t CO CO BI NIN O O Cx Cx CN i gt O O O O O O O o ol O O O O O O O o O O O O O O lt lt H Af O lt ol col ool cN rl oo st 4 4 4 4 4 4 J o O 4 4 4 Jj NI N N w N O N O CO d d d CO CO CO cO NI N N N CN NI lt lt w q w Of o C CN OQ ol CN lt N O O NI M if ATTN o9 N 99 TT v7 7 v CN ON cN 11 72 29 33 11 DISASSEMBLY INSTRUCTIONS e KFR 3601G BPE KFR 4001G BPE OPERATION PROCEDURE PHOTOS Front Panel 1 Remove the grille 1 Open the front panel 2 Take out the screws in the grille 3 Hold the both sides of the grille dragging towards oneself and then remove it Screws 2 Remove the electrical control box Sensor Bracket 1 Remove the indoor coil sensor from the sensor bracket Screw 2 Remove the switching board 3 Take out the screws of the terminal board then Remove the Termin
7. the low and high frequencies 17 7 CONTROL MODE 1 1 In this mode the outdoor fan will work as follows Outdoor temperature gt 28 High Outdoor temperature lt 28 and condenser temperature gt 40 High Outdoor temperature lt 28 C and40 C gt condenser temperature gt 35 Mid Outdoor temperature lt 28 Low Heating 1 1 In the heating mode the set temperature is determined by the remote controller The temperature range is 16 C 30 C 1 2 The compressor will start immediately when the machine is switched on it will take at least 3min for the compressor to restart if the machine is restarted 1 3 If the compressor is started it must run at least 5min 1 4 When the air conditioner is switched off the compressor will stop and the outdoor four way valve will be delayed off The remaining heat will be discharged by the indoor unit before it stops 1 5 Cold air prevention When the air conditioner is started the indoor unit will not run immediately It will not start until the indoor heat exchanger 15 warmed up 1 6 During operation when the preset temperature is met the indoor compressor will stop to cause the indoor fan to stop So when the compressor restarts the cold air prevention will still be working 1 7 In this mode the outdoor fan will work as follows Outdoor temperature 24 Low 15 2 outdoor temperature gt 10 Mid Outdoor temperature 10 C High 1 8 The four w
8. 2 Take out the screws of the fan motor and remove the fan motor 3 Take out the screws of the fan supporter and remove the fan supporter 4 Take out the screws of the partition plate and remove the partition plate Fan Fan Supporter Seperator Support Plate 6 Check up the other parts of the outdoor units 1 Check up the condenser ass y 2 Check up the compreesor ass y 3 Check up the barrier ass y 4 Check up the base ass y Condenser ass y Compreesor ass y d ass y 4 Screw Base ass y 39 12 PARTS LIST 40 12 5 LIST KR 36018 BP KFR 4001G Description Quantity Part NO 1 Front Panel 1 RZA 2 1601 003 XX 0 2 Air Filter 2 RZA 0 2305 005 XX 0 3 Electrical Control Box cover 1 RZA 2 2369 006 XX 0 4 Display panel 1 RZA 0 2258 003 XX 5 Grille 1 RZA 0 1501 004 XX 0 6 Water Plate 2 RZA 0 2326 102 XX 0 7 Evaporator Supporter 1 RZA 2 2219 014 XX 0 8 Evaporator Ass y 1 RZA 0 0055 033 XX 0 9 Bearing Ass y 1 RZA 0 2510 100 XX 0 10 Cross Flow Fan Ass y 1 RZA 0 2509 100 XX 0 11 Down Left Cover 1 RZA 2 2369 007 XX 0 12 Base Ass y 1 RZA 0 2201 101 XX 0 13 Insulator Cover Ass y 1 RZA 0 2209 016 XX 0 14 Mounting Plate RZA 2 2478 100 XX 0 15 Installation Plate 1 RZA 2 2230 100 XX 0 16
9. 2 2514 104 XX 0 1 22 Base _ Ass y RZA 2 2201 104 XX 0 1 23 RZA 2 2405 022 XX 0 1 24 Mounting Plate RZA 2 2487 005 XX 0 1 25 Installation Plate RZA 2 2230 102 XX 0 1 26 Mounting Plate RZA 2 2362 020 XX 0 1 27 Electrical Control Box RZA 2 5301 028 XX 0 1 28 Electrical Control Box cover RZA 2 2369 013 XX 0 1 29 Electrical Control Box cover RZA 2 2369 014 XX 0 1 30 RZA 0 5177 014 XX 0 1 31 Power Transformer RZA 0 5263 022 XX 0 1 32 Terminal RZA 0 5306 041 XX 0 1 33 Connection Cable Clip RZA 0 5304 017 XX 0 1 34 Power Cable Clip RZA 0 5304 016 XX 0 1 35 Remote Controller RZA 0 0054 054 XX 0 1 36 Power Wire RZA 0 5150 035 XX 0 l 37 Display Ass y RZA 0 5172 219 XX 0 38 Indoor Coil Sensor RZA 0 5259 050 XX 0 1 45
10. SO CNOI 4 ACIN2 CN03 2 SCK CNO08 5 gt CLK CNOI 5 REMOTE CNO8 6 gt REMOTE CNOI 6 SKCNO03 1 SW CNO08 7 3 4 gt SW CNOI 7 27V CNO2 2 4 6B CN02 3 27V CN02 1 4 6 2 4 4 6 02 2 4 6A CN02 3 POWER TRAN POWER WIRE K TRANSE CN04 1 L J TRANSE CN04 2 4 6A CNO1 1 gt MID CN01 2 FLAP2 CN17 1 4 6B CN01 3 FLAP2 CN17 2 gt 9V CN01 4 FLAP2 CN17 3 STEP MOTOR 9V CN01 5 FLAP2 CN17 4 AC22V CN01 6 2 7 5 gt AC22V CNOI 7 FAN MOTOR INDOOR SENSOR FAN CNO7 1 gt ROOM CN20 1 L Q 2 gt ROOM CN20 2 FAN CN07 2 FAN CNO7 3 gt COIL CN19 1 gt COIL CN19 2 PHASE TEST 5V CN11 1 1 SENSOR PH CN11 2 2 GND CN11 3 3 411 4 WIRING DIAGRAM 3502 CONTROL BOARD IPM BOARD gt SI CN09 FIL BOARD TERM PANEL VNC CN15 10 VNC CNI2 10 VNI CNIS 11 VNI CNI2 11 INI CN04 IN2 CN05 DC OUTI CN11 P CNO7 REC BRIDGE DC OUT2 CNO01 CBLK gt N CN06 AC W CN03 gt ACOUTI CN03 V CN04 U CNOS gt VFC CNI8 1 VFC CNOS 1 GND CNI8 2 GND CNO5 2 5V CN18 3 5V CNO05 3 Z CN18 4 Z CNOS 4 INDUCTOR Y CN18 5 05 5 X CN18 6 X CN05 6 W CN18 7 W CN05 7 V CN18 8 V CN05 8 U CN18 9
11. U CN05 9 DC IN1 CN02 SV CNI0 1 SV CNI0 2 FAN CAP CN06 1 DC IN2 CN07 PTC FAN CAP CN06 2 FAN CAP PTC GAIKI CN17 1 COMPRESSOR GAIKI CN17 2 CONDENSOR _ Sos L 2 COMP CNI6 1 DISCHARGE SENSOR COMB OSA S C CNOS 1 AC CNO8 2 H CNO8 3 M CNO8 4 L CNO8 5 EARTH FAN MOTOR 412 5 SYSTEM DIAGRAM KFR 3502GW BPE OUTDOOR UNIT INDOOR UNIT Outdoor heat exchanger 4 way valve Refrigerant pipe 12 7 NER with heat insulator Muffler sensor exchanger Flared connection ndoor coil Service valve sensor Indoor coil Accumulator sensor Capillary tube 2 1 42 820 Cooling cycle Flared connection Strainer pes cdi Refrigerant pipe Service valve 6 35 Capillary tube with heat insulator 1 59510 KFR 3601GW BPE KFR 4001GW BPE INDOOR UNIT OUTDOOR UNIT Rerigerant pipe 12 7 With heat insulator Heat exchange Indoor Flare connection ay vane Heat exchangen sensor Indoor temper sensor 1 Flare connection SHH Rerigerant pipe Strainer GSTTIS T tube 6 35 Service vavle Check valve Cooling cycle With heat insulator Heating cycle am 13 o REFRIGERANT SYSTEM DIAGRAM MAX REFRIGERANT PIP
12. activated and the timer symbol lights up When the setting time arrives the machine shuts off after a signal from the remote controller is received If no signal is received at the setting time the machine will automatically shut off At the same time the man machine communication symbol goes off 3 3 The timing mode cannot be cancelled by the switching on and off operations When the machine is switched off the timer symbol remains on 20 8 TROUBLESHOOTING 1 Trouble code display When the controller creates protection press the sensor button the trouble codes will be displayed at the place for the indoor temperature on the VFD of the indoor unit Once a trouble code appears due to the trouble of the air conditioner it can not be cleared unless the machine is powered off Trouble Code Table X means the light diode lights up means the diode goes off Content of trouble Indoor display code Outdoor unit display Indoor sensor trouble Evaporator sensor trouble Evaporator freezing Over hot of indoor heatexchanger Communication trouble Fan motor trouble Air outlet sensor trouble Lightness sensor trouble Indoor unit EPROM trouble Outdoor sensor trouble Condenser sensor trouble Over current Over hot of compressor Overload protection Power voltage trouble Momentary power failure Overload of outdoor unit for cooling 31 trouble Ka Data
13. and then start up the air condi toner Is the system y Ourdoor cont r ol in good Yes board troubl e condi t i on Indoor cont rol board troubl e and repl ace it Set the air condi ti oner oper ate in fan node Does fan not or stop wth the remote cont rol er Is i ndoor fan motor runni ng Does t he socket of indoor control board have power i nput Yes Is resi stance of ndi ng O short circuit ori Open circuit Move t he s and cr oss f an by hand do t hey rotate hl y Indoor control board troubl e and ace it Fan notor trouble Yes 5 11 Fan notor troubl e and 25 Is indoor heat exchanger very hot Ye 15 conpressor still running Yes Swch off the power st art up the air condi toner in 10 ninutes Is the systemin good condi t i on No Indoor coi sensor troubl e pr ot ect i Yes by chance Swch of f the t he outdoor control board and then start up the air condi toner 1 the system i n good condi t i on Indoor control board troubl e and repl ace it Fan notor trouble and Yes it Yes r door control board trouble 9 SERVICE FLOW 5 ay boar d troubl e and
14. j E Front panel N Horizontal Vane Color display screen Air outlet Power plug Vertical vane KFR 3502G BPE e OUTDOOR UNIT Air inlet rear and side Tubes and cable Drainage hose WH N j 2 UNS NS 22 Air outlet lt EX AR LF 1 PART NAMES AND FUNCTIONS KFR 3601G BPE KFR 4001G BPE e REMOTE CONTROL UNIT Transmitter Transmitting signals to the indoor unit the symbol will appear on the top of LCD Sensor Testing the ambient temperature of the remote control unit LCD Displaying the running condition A 39 T SETTING 20 on 71 On Off button Press the button to run press again gt to cease SENS J OO Temperature setting button Hi power running button Press the button marked 9 se to increase or decrease temperature Sleep button Mode selection button Press the button the appliance enter sleep mode Auto heating dehumidification Y Flap Fan 4 cooling Up down adjustment Air exchange button When this function works the air Timer on off button can be keep fresh Setting the time of appliance on off Set cancel timer button Set or cancel the time of appliance on off Fan sp
15. the Is filter Is broken or short troubl e unit V ve filter board startup resi st or board open Yes circuit circuit The control systemof out door unit has short circuit Is the fuse in 7 Connect wre troubl e check the connect i on control box of Ye Repl t he troubl e uni t troubl e wre filter board out door 20 broken cont rol board i fi and el ect rol capaci t or 15 there input between 1 2 Yes Connect terminal panel of troubl e and check out door uni t Yes Connect i wre troubl e and check T Is there power out put bet ween 1 and 2 on terminal panel of indoor uni t Is there the power out put of indoor unit nain rel ay RYO1 Y Connect i wre troubl check 26 control board 9 SERVICE FLOW CHART Swch off and start up Is it ok Is the operati ng current beyond Normal range Yes Nor nal pr ot ect i on Is the surface of Nor nal Yes compressor very hot pr ot ect i on Yes Repl ace t he Sw ch of f and start up 15 it ok Yes by chance n Repl ace t he Is the resi st ance Fep ace out door cont rol Y
16. 128 1584 2792 1606 22 3908 1293 3941 1420 3882 1518 3600 1530 3370 1623 2973 1617 lt HEATING CAPACITY Indoor Outdoor intake air WB C lt model Intake Air 15 10 5 0 5 10 15 C DB C CA PC CA PC CA PC CA PC CA PC CA PC CA PC LL KFR 3601 15 3452 1759 3871 1746 4242 1781 4792 1805 5362 1802 5209 1498 5619 1492 O GW BPE 1871 4027 1815 1499 5230 1495 gt 2200 1781 3697 1774 1494 4844 1511 lt KFR 3502 1739 4627 1788 1457 5017 1385 GW BPE 3861 4545 5092 5113 1390 CY 25 3265 1743 3638 1793 3963 1744 4296 1777 4706 1684 4934 1625 4991 1453 t LLI CL cO 46 7 CONTROL MODE 1 Automatic 1 1 When the air conditioner is switched on and the remote controller is set to Auto mode the air conditioner will select running modes automatically according to the difference between the room temperature and the setting temperature 1 2 The running mode will be set when the machine is first switched on Once set the running mode cannot be changed within 30 minutes 1 3 If the difference between the room temperature and the setting temperature exceeds 3 degrees change the running mode immediately 1 4 If the machine is turned off and restarted using the remote controller the above conditions are still good 1 5 Ifthe machine is powered off and restarted the running mode must be re selected 1 6 The running frequency will be determi
17. E CNI0 3 FAN CNO7 1 FAN CNO7 2 ROOM CN20 1 FAN CNO7 3 gt ROOM CN20 2 gt COIL CN19 1 COIL CN19 2 PHASE MOTOR SV CNI 1 1 PH CN11 2 GND CN11 3 we foe EVAP SENSOR FAN CAP L gt CAP CN06 1 SW CNI5 1 GND CNI5 2 POWER SWITCH L CAP CNO6 2 ELECTRICAL WIRING DIAGRAM CONTROL BOARD SI CNO9 OUTDOOR UNIT IPM BOARD VUPC CNI2 1 VUPI CNI2 2 VVPC CN12 4 VVPI CNI2 5 VWPC CNI2 7 VWPI CNI2 8 ERM PANEL VNC CNI2 10 VNI CNI2 11 AC INI CNO4 EED lt gt OUT2 AC IN2 CNO5 DC OUTI CN11 REC BRIDGE DC OUT2 CNO1 rc AC AC OUTI CN03 P CN07 N CN06 W CN03 V CNOA4 U CNO5 gt VFC CNOS 1 GND CNOS 2 5V CNOS 3 Z CNOS 4 Y CNO5 5 X CNO5 6 W CNOS 7 V CNOS 8 U CNO5 9 VFC CNI8 1 GND CNI8 2 SV CN18 3 Z CNI18 4 Y CNI8 5 X CNI18 6 W CNI8 7 V CNI8 8 U CNI8 9 DC INI CNO2 FAN CAP OUTDOOR SENSOR COMPRESSOR CONDENSOR SENSOR DISCHARGE SENSOR AC CNO8 2 H CNOS 3 M CNOS 4 EARTH FAN MOTO 4 WIRING DIAGRAM KFR 3502G BPE ELECTRICAL WIRING DIAGRAM ELECTRICAL WIRING DIAGRAM INDICATOR BOARD TERM PANEL CONTROL BOARD 5V CN08 1 1 5 V CNO1 1 GND CN08 2 ja 2 GND CN01 2 CS CNO08 3 gt _ gt CS CN01 3 SO CNO08 4 gt
18. Exchange Ass y 1 RZA 0 2538 001 XX 0 17 Mounting Plate 1 RZA 2 2362 018 XX 0 18 Down Right Cover 1 RZA 2 2369 008 XX 0 19 Fan Motor 1 RZA 0 0000 046 XX 0 20 Motor Guard 1 RZA 0 2514 102 XX 0 21 Air Outlet Frame 1 RZA 0 1504 016 XX 0 22 Stepper Motor 2 RZA 0 0000 048 XX 0 23 Drainage Hose Ass y 1 RZA 0 1303 100 XX 0 24 Vane Install Plate Ass y 1 RZA 0 1514 011 XX 0 25 Short Vane Lever 1 RZA 2 1514 009 XX 0 26 Long Vane Lever 1 RZA 2 1514 013 XX 0 27 Vane 9 RZA 2 1519 003 XX 0 28 Down Flap 1 RZA 2 1523 005 XX 0 29 Up Flap 1 RZA 2 1523 004 XX 0 30 Sensor Bracket 1 852 2 5303 215 01 0 31 Indoor Coil Sensor 1 RZA 0 5259 051 XX 0 32 Terminal 1 RZA 0 5706 025 XX 0 33 Power Transformer 1 RZA 0 5263 022 XX 0 34 Transformer Fixing Plate 1 RZA 2 2222 008 XX 0 35 Power Cable 1 RZA 0 5250 035 XX A 36 Display board 1 RZA 0 5172 146 XX A 37 Electrical Control Box 1 RZA 0 5301 020 XX 0 38 Control Board 1 RZA 0 5172 145 XX 0 39 Switching Ass y 1 RZA 0 5152 023 XX A 40 Remote Controller 1 RZA 0 0054 044 XX D 41 12 5 LIST KFR 3601W BPE KFR 4001W BPE KFR 3502W BPE i
19. ING LENGTH Refrigerant Piping Piping size O D mm Length of connecting pipe m Modles Max Length m A Gas Liquid Indoor unit Outdoor unit KFR 3502GW BPE 15 12 7 6 35 KFR 3601GW BPE 15 12 7 6 35 KFR 4001GW BPE 15 12 7 6 35 MAX HEIGHT DIFFERENCE Refrigerant piping Max length Max Height A difference 5m M Outdoor unit ADDITIONAL REFRIGERANT CHARGE R 22 g Modles Outdoor unit precharged Refrigerant piping length one way up to 7m 7m 10m 15m KFR 3502GW BPE 1150 0 75 200 KFR 3601GW BPE 1100 0 75 200 KFR 4001GW BPE 1180 0 75 200 14 5 REFRIGERANT SYSTEM DIAGRAM EVACUATION PROCEDURES Connect the refrigerant pipes both the liquid and gas pipes between the indoor and the outdoor units Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe The stop valve will not work in its initial state fresh out of the factory totally closed with cap on Connect the gage manifold valve and the vacuum pump to the service port of the stop valve on the gas pipe side of the outdoor unit Run the vacuum pump for more than 15 minutes and at this time confirm that the pressure gage indicates 0 1 Mpa 76 cmHg Check the vacuum with the gage manifold valve then close the gage manifold valve and stop the vacuum pump Leave it as is for or two minutes Make sur
20. Off button Press the button to run press again to cease T Z Temperature setting button Hi power running button I Press the button marked OK V to increase or decrease the temperature ON OFF Sleep button Mode selection button Press the button the appliance enter sleep mode Auto heating dehumidification 4 M Flap Fan lt cooling Up down adjustment Timer on off button Setting the time of appliance on off Set cancel timer button Set cancel the time of appliance on off Fan speed selection button Reset button Press the button after batteries are loaded and indication appears on LCD Duel energy saving This function can be used for Restricting the max electric current by control software A C sensor button Press the button if the remote control unit is liable to be affected by the heat resource such as electric blanket radiator or sunlight this will use the sensor of indoor unit the symbol will appear on the LCD Sliding cover Battery compartment REMARK The remote controller transmits signal to indoor unit at 3 minutes intervals If the indoor unit has not received the signal for more than 10 minutes due to remote controller missing or other reason the sensor on indoor unit will be used for detecting indoor temperature automatically Here ambient temperature of remote controller is likely to slightly different from that detecting by the
21. WB24 C Indoor DB20 C WB15 C Outdoor WB 6 2 SPECIFICATION Model KFR 3502GW BPE Function Cooling Heating Power supply a c220 50Hz Capacity KW 3 5 Capacity Dehumidification Air flow Power outlet Running current Power input Electrical data Auxiliary heater Power factor Starting current Compressor motor current Fan motor current Coefficient of performance C O P 2 7 3 0 Model Compressor Output Winding resistance 120 indoor Model fan motor Winding resistance 120 O KFR 3601GW BPE Outdoor Model UE6T C41A4 fan motor Winding resistance at20 C 151 4 Width mm 285 Indoor unit Height mm 220 Dimensions Depth mm 805 Width mm 316 Outdoor unit mm mm Weight Indoor unit Air direction Sound lever Indoor unit dB Hi Outdoor unit dB Fan speed Indoor unit rpm Hi Outdoor unit rpm Special remarks Fan speed Indoor unit regulator Outdoor unit Refrigerant filling capacity R 22 kg NOTE Test conditions Cooling Idoor DB27 C WB19 C Outdoor DB35 C WB24 C Heating Indoor DB20 C WB15 C Outdoor DB7 C WB 6 C 6 3 OUTLINES AND DIMENSIONS KFR 3601G BPE KFR 4001G BPE 855 230 3 OUTLINES AND DIMENSIONS KFR 3502G BPE AG eee OOo LJ MERE I jl j j j u 1 CC 1 0 8
22. al Board terminal board 4 Disconnect all the circuitry of the printed circuit board 5 Remove the printed circuit board and check up it 6 Disconnect the circuitry in the electrical control box 7 Remove the printed circuit board Indoor Sensor 8 Take out the screws of the electrical control box and Screws remove electrical control box 3 Remove the air outlet frame Screws 1 Take out the screws of the stepper motor and disconnect the stepper motor and the air outlet frame Stepper Motor 2 Remove the stepper motor Drainage Hose 3 Disconnect the drainage hose and the air outlet frame 4 Take out the screws of the air outlet frame 5 Remove the air outlet 234 11 DISASSEMBLY INSTRUCTIONS KFR 3601G BPE KFR 4001G BPE 4 Remove the evaporator 1 Disconnect the evaporator and the other parts then remove the screws of the evaporator 2 Remove the evaporator Fan Motor Motor Cover 5 Remove the cross flow fan and the fan motor 1 Take out the screws of the motor cover and remove the cover 2 Remove the cross flow fan and the fan motor Cross Flow Fan Screws 35 11 DISASSEMBLY INSTRUCTIONS KFR 3502G BPE OPERATION PROCEDURE PHOTOS Front panel 1 Remove the grille Grille 1 Open the screw cover in the grille 2 Take out the screws of the 3 Hold the both sides of the front panel
23. and drag it towards oneself shown the switching board of the indoor unit 4 Remove the grille Grille Screws 2 Remove the electrical control box 1 Remove the electrical control box cover 2 Remove the indoor coil sensor from the sensor bracket 3 Take out the screws of the terminal and remove the Electrical Control Box Cover terminal board Terminal Terminal Screw 4 Disconnect all connectors on the printed circuit board Indoor Coil Sensor 5 Remove the printed circuit board and check up it 6 Disconnect the circuitry in the electrical control box 7 Take out the screws of the electrical control box and remove the electrical control box 3 Remove the air outlet frame 1 Take out the screws of the stepper motor disconnect the stepper motor and the air outlet frame 2 Remove the stepper motor 3 Disconnect the drainage hose and the air outlet frame 4 Take out the screws of the air outlet frame Stepper Motor 5 Remove the air outlet frame 36 11 DISASSEMBLY INSTRUCTIONS e KFR 3502G BPE 4 the evaporator 1 Disconnect the evaporator and the other parts take out the screws of the evaporator t 2 Remove the evaporator Screws 5 Remove the fan motor and the cross flow fan 1 Take out the screw of the rubber cover and remove the Rubber Cover rubber cover 2 Remove the screw connecting the fan motor and the Cross Fl
24. ay valve is in conducting state 2 Defrosting 2 1 The defrosting is done through changing the flow direction of refrigerant inside of the four way valve 2 2 Defrosting conditions Continuous heating run for more than 30min During single machine operation T outdoor T outdoor cog gt 7 C and lasts 5 minutes 2 3 Defrosting process Compressor and outdoor fan motor off four way valve off compressor on defrosting conditions met gt compressor off gt four way valve on compressor gt outdoor fan on end 3 Ventilation Fan mode During fan operation only the indoor fan and the flap are running in the setting mode If the fan speed is set to Auto it will enter in low speed run 18 7 CONTROL MODE 1 Energy saving 4 1 Press the SOFT button on the remote controller to activate the energy saving function Now the energy saving symbol appears on the screen Press the button again to cancel this function the corresponding symbol will go off 4 2 During energy saving mode the electric current will be limited to 60 of the rating level through adjusting the compressor revolving frequency and limiting the maximum current 4 3 This mode cannot be cancelled by the switching on and off operations When the machine is turned off the energy saving symbol will remain on 2 Sleeping 5 1 During heating or cooling mode press the SLEEP button on the remote controller the sleeping mode can be set or
25. bh WW TT i a i a 3 OUTLINES AND DIMENSIONS KFR 3601W BPE KFR 4001W BPE KFR 3502W BPE wlOE TUBE SERVICE VALVE 29 52 3 8 NARROW TUBE SERVICE VALVE 6 35 1 4 ul H z lt Hi lt 2 4 WIRING DIAG KFR 3601GW BPE KFR 4001GW BPE ELECTRICAL WIRING DIAGRAM ELECTRICAL WIRING DIAGRAM INDICATOR BOARD CONTROL BOARD CBRN gt RED TERM PANEL AC INI OUTI ACIN2 CNO6 2 SI CNO6 1 5V CNOB8 1 GND CNO8 2 CS CNO8 3 SO CNOS 4 SCK CNO8 5 REMOTE CNOS 6 BRIGHT CNO2 1 27V CNO2 2 4 6B CNO2 3 4 6A CNO2 4 5V CNO1 1 GND CNO1 2 CS CNO1 3 SO CNO1 4 CLK CNOI 5 REMOTE CNO1 6 BRIGHT CNO2 1 27V CNO2 2 4 6B CNO2 3 4 6A CNO2 4 EvA POWER TRAN INDOOR SENSOR FLAPI CN16 1 FLAPI CN 16 2 FLAPI CN 16 3 FLAPI CN16 4 FLAPI CN16 5 POWER WIRE pe 1 4 6A CNO1 1 MID CNO1 2 4 6 01 3 9V CN01 4 9V CN01 5 AC22V CN01 6 AC22V CN01 7 TRANSE CNOS 1 TRANSE CNOS 2 FLAP2 CN17 1 FLAP2 CN17 2 FLAP2 CNI17 3 FLAP2 CNI17 4 FLAP2 CNI17 5 STEP MOTOR 2 VCC CNO9 1 GND CNO9 2 VEN CNO9 3 AIR EX FAN POWER TRAN TRANSE CNIO 1 gt TRANS
26. cancelled and the sleeping symbol on the screen will light up or go off accordingly 5 2 Heating After this function is enabled the setting temperature will fall down 3 degrees within an hour Two hours later the temperature will fall down another 4 degrees and the machine will be turned off after running for another 5 hours 5 3 Cooling After this function is started the setting temperature will rise 1 degree within an hour and the machine will be turned off automatically after another 7 hours 5 4 The default mode is sleeping off The sleeping function will be cancelled after the machine is switched off 3 High power In this mode the indoor fan speed will go into high level The compressor runs at the max permissible frequency which will be displayed on the screen The original running mode will be automatically resumed after running for 15 minutes 4 Temporary switch 7 1 If the remote controller is missing press the temporary switch and the system starts in the automatic mode press the switch again to stop the system Automatic mode follows A indoortemperature gt 26 C cooling mode temperature setting 26 C B indoor temperature gt 23 C heating mode temperature setting 26 C C 23 C indoor temperature gt 26 C fan mode Indoor fan speed is automatic in automatic mode 7 2 Hold down the temporary switch for 5 seconds or longer and the system is forced to run in the cooling mode regardless of indoor temperature NOTE Operati
27. e the pointer of the gage manifold valve remains in the same position Stop valve Liquid pipe wrench Gas pipe Close Open Stop valve wrench Remove the gage manifold valve quicklyfrom the service port of the stop valve After refrigerant pipes are connected and evacuated fully open all stop valves on gas and liquid pipe sides Operating without fully opening lowers the performance and causes trouble Pipe length Pipe length 7m maximum exceeding 7m No gas charge is Charge the prescribed needed amount of Tighten the cap to the service port to obtain the initial status Retighten the cap 15 COOLING Note Capacity W PA Power consumption Kw Indoor Outdoor intake air DB C model Intake Air 20 25 30 35 40 45 KFR 3601GW BPE 16 3787 1425 3671 1439 3420 1498 3123 1501 2855 1564 2649 1637 220 50 2 18 3876 1445 1525 3475 3244 1637 20 4160 1434 1499 3644 3367 1583 22 4326 1432 1488 3930 3632 1584 KFR 3502GW BPE 16 3622 1296 3425 1409 3308 1512 3000 1520 2775 1598 2473 1590 220V 50Hz 18 3665 1295 3330 1176 3380 1350 3068 1359 2789 1434 2433 1430 20 3811 1296 3792 1406 3633 1542 3417 1528 3
28. eed selection button Temperature displaying button setting the temperature in the screen of indoor unit Reset button Press the button after batteries are loaded and indication appears on LCD Duel energy saving This function can be used for Restricting the max electric current by control software A C sensor button Press the button if the remote control unit is liable to be affected by the heat resource such as electric blanket radiator or sunlight this will use the sensor of indoor unit the symbol will appear on the LCD Sliding cover Battery compartment REMARK The remote controller transmits signal to indoor unit at 3 minutes intervals If the indoor unit has not received the signal for more than 10 minutes due to remote controller missing or other reason the sensor on indoor unit will be used for detecting indoor temperature automatically Here ambient temperature of remote controller is likely to slightly different from that detecting by the indoor unit temperature will be compensated automatically When the remote controller is missing or the batteries are exhausted please use the temporary switch 1 PART NAMES AND FUNCTIONS KFR 3502G BPE REMOTE CONTROL UNIT Transmitter Transmitting signals to the indoor unit the symbol will appear on the top of LCD Sensor Testing the ambient temperature of the remote control unit LCD Displaying the running condition On
29. es Qut door cont rol of essor di schar gi ng board 15 it ok board troubl e di schar gi ng sensor sensor correct 5 door wave filter Qut door cont rol board hae and trouble and replace it p Repl ace t he out door cont r ol board Is it ok Conpr essor door wave filter board troubl e trouble and ace it I PMtroubl and Yes 11 Yes door control board Do there have vol tage out put bet ween PMand U W 1 the vol tage of bet ween PMand Pi correct Swtch of f the power suppl y and st art up in 3 ninutes V ve filter board trouble ace it Are t here mis poor cont act di sconnect i on among the socket i ndoor unit and outdoor unit Reconnect res or Yes repair the socket Does thls trouble still appear The vol tage of power suppl y 15 out of Normal range Is the vol tage of power suppl y Norrral Normal pr ot ect i on Yes Repl ace t he out door cont r ol board Is it ok door cont rol board trouble and ace it Yes door cont r ol board troubl 27 9 SERVICE FLOW 1 the out door Nor nal Are all the wres heat exchanger Yes g
30. failure of outdoor EPROM 3X x 2 Trouble code display when is restricted when the protection function is in action the compressor doesn t work only its frequency is restricted the LED of outdoor unit displays the work condition Serial Cause of frequency LED OF outdoor unit number restriction LED02 LED04 In good condition Power voltage isn t in normal range Overload of outdoor unit Over current of outdoor unit Exhaust over hot 6 Evaporator freezing 7 Setting frequency 21 8 TROUBLESHOOTING 3 The content of trouble code display 3 1 Abnormal sensor when the sensor is short circuited or cut off the compressor will stop and the trouble code will be displayed 3 2 Abnormal power module IPM when the power module comes about such problems as overheat over current short circuit the compressor will stops and the trouble code will be displayed 3 3 Temperature protection for the compressor exhaust When the compressor exhaust temperature lt 90 C the compressor runs at the ascending frequency When the temperature gt 90 C the compressor runs at the limit to the frequency ascending When the temperature gt 106 C the compressor runs at the descending frequency When the temperature gt 117 C the compressor stops 3 4 When the temperature protector at the top of the compressor functions the compressor stops and the trouble code is di
31. he trouble code is displayed 3 10 Start delay protection When restarting the machine the start is delayed for 3 minutes for protection 3 11 Communication trouble when the outdoor unit is turned on the indoor unit will shut down the indoor unit 3 minutes later if the indoor unit has not received an effective communication signal which returns from the outdoor unit And at the same time the trouble code is displayed After another 3 minutes the outdoor will be powered on again Once the communication returns to normal the trouble code will be cleared 3 12 The trouble in the indoor fan motor when the indoor micro computer depending on the position of the rotor of the indoor motor determines the motor is in stoppage lock or abnormal vibration state the micro computer will cut off the driving signal of the indoor fan 3 minutes later it is restarted If the trouble occurs 4 times within 30 minutes the air conditioner will stop and the trouble code will be displayed It can not be restarted unless being powered on again 23 9 SERVICE FLOW CHART Does it the si gnal of remote controller Does VFD scr een di spl ay Nor mal y Start up sel f test f unct i on Check t he resul t Is the fuse bl own Is remite Remte control er cont roll er in good trouble the condi ti on 2 bat t ery 1 the wres Reconnect all poor Yes the
32. indoor unit temperature will be compensated automatically When the remote controller is missing or the batteries are exhausted please usethe temporary switch 2 SPECIFICATION Model KFR 3601GW BPE KFR 4001GW BPE Function Cooling Heating Cooling Heating Power supply a c 220V 50Hz a c 220V 50Hz Capacity 3 6 5 0 4 0 6 0 Capacity Dehumidification 1 8 ra Air flow Power outlet Running current Power input Electrical Auxiliary heater data Power factor Starting current Compressor motor current Fan motor current Coefficient of Indoor fan motor Compressor Output 2 68 3 16 2 6 2 8 340 main 340 main 395 assisitant 395 assisitant performance C O P Winding resistance at20 C Winding resistance at20 C Outdoor Model UE6T C41A4 UE6T C41A4 fan motor Winding resistance at20 C 151 4 151 4 Dimensions Width Height Depth 860 860 285 285 Indoor unit Outdoor unit Height Indoor unit Outdoor unit Air direction Sound lever Indoor unit Hi Outdoor unit Fan speed Indoor unit Hi Outdoor unit Special remarks Fan speed Indoor unit regulator Outdoor unit Refrigerant filling capacity R RT1 at25 C 2 25 RT3 at25 C Thermitstor NOTE Test conditions Cooling Heating Idoor DB27 C WB19 C Outdoor DB35 C
33. ndoor unit The default airflow setting depends on that detected by the remote controller The remote controller detects room temperature once every 20 seconds and transmits signals once every 3 minutes or when the detected temperature is not the same If the indoor controller cannot receive signals for more than 10 minutes it will automatically start the temperature sensor at the air inlet of indoor unil Meanwhile the man machine communication symbol on the screen will go off 2 2 The man machine communication mode cannot be cancelled by the switching on and off operations When the machine is switched off the man machine communication symbol will remain on 2 3 When the machine is turned on the man machine communication symbol will appear When the air conditioner is started by the switch button of indoor unit the man machine communication symbol will go off 3 Timing on and off 3 1 Timing On when the timing on function is set by the remote controller the timing on function of the air conditioner is activated and the timer symbol lights up When the setting time arrives the machine starts with the setting mode after a signal from the remote controller is received If no signal is received at the setting time the machine will run by automatic settings At the same time the man machine communication symbol goes off 3 2 Timing Off when the timing off function is set by the remote controller the timing off function of the air conditioner is
34. ned by the temperature difference 2 Cooling 2 1 In the cooling mode the preset temperature is determined by the remote controller The temperature range is 16 30 2 2 The compressor will start immediately when the machine is first powered on it will take at least 3min for the compressor to restart if the machine is restarted 2 3 The fan speed changes in auto mode setting Tindoor Fan speed T setting Tindoor Fan speed 0 C Low 0 C Low 1 C Mid Temperature 1 C Mid difference 2 4 Outdoor fan speed T outdoor gt 28 High T outdoor lt 28 C Determined by the outdoor coil tube temperature T outdoor coil tubes When T outdoor coil tube gt 40 High 35 C lt T outdoor coil tube lt 40 Mid T outdoor coil tube lt 35 C Low Temperature difference gt 5 High 2 5 The four way valve is off Dehumidification 1 1 In the dehumidification mode the temperature is determined by the remote controller The temperature range is 16 C 30 C The controller will determine the running mode according to the indoor and outdoor temperature difference 1 2 When the room temperature is 2 Chigher than the preset temperature cooling run will be started When the temperature difference between the indoor and outdoor is lower than or equal to 2 oGthe drying mode will be started When running in the drying mode the compressor will alternate between
35. nel e DISP A poseen on tim 14 H 5 E oem 1208 201 5 af jo D o m 5 Stt 2 BN oq o o CA A 52 o 2 ico Ao ale RE 2 ranstormer second 30 9 SERVICE FLOW CHART KFR 3502W BPE KFR 3601W BPE KFR 4001W BPE Outdoor electric control P C Board U U H out to Compressor DC 280U in RZR 4 5174 006 Xk 0 Earth control signle ino 94 220 2400 2800 Fuse 2500 3 154 220 290 in Power out e Fan capacitor Fan motor nooe 24 4 uay valve AC 220 2409 Oc fuse 208 Dc fuse 3 158 FRO SET Campressor thermostat suitch Outdoor coil sensor m e pc ioo T z 30002062050020022010020 22020225 B 3 DC 150 Pr Compressor exhaust sensor DC 150 CT nsa p 9 zi Outdoor temperature sensor 7 wo Ipm control out 31 10 SENSOR INDOOR SENSOR PARAMETER OF THE gt gt gt gt gt gt gt gt E THE PARAMETER OF THE COIL AND OUTDOOR SENSOR G gt E gt m z gt gt amp
36. ng frequency and rated values of the compressor Item KFR 3601GW BPE KFR 4001GW BPE KFR 3502GW BPE Hz Frequency Rated Frequency Rated Frequency Rated Mode range frequency range frequency range frequency Cooling 30 110 84 30 110 94 15 110 82 Heating 30 137 96 30 137 112 15 137 92 10 7 CONTROL MODE Other functions 1 Flap control 1 1 Press the FLAP button on the remote controller continuously the flap will alternate within the following eight positions Auto fixed including the six positions of the flap from top to 1 2 3 4 5 6 and swing 1 2 Auto During the heating mode the flap is set at position 5 during the cooling and dehumidification mode the flap is at position 2 during the fan mode it is at position 2 1 3 Fixed The position of the flap is fixed at a certain position by the remote controller 1 4 Scanning During cooling and fan mode the flap sways among positions 1 4 during heating mode the flap sways between positions 3 6 1 5 The default mode is Auto 1 6 When first turned on or turned off the flap will turn to the furthermost positions to ensure well closing of the flap When started the flap will turn to the furthermost positions After the grille 18 completely closed it will turn to the setting position 2 Man machine communication 2 1 The indoor controller has two temperature sensors to detect the room temperature one in the controller and the other at the air inlet of i
37. ow Fan cross flow fan Fan Motor 3 Remove the fan motor and the bearing ass y 4 Remove the cross flow fan Cross Flow Fan Screws 37 11 DISASSEMBLY INSTRUCTIONS eKFR 3502W BPE KFR 3601W BPE KFR 4001W BPE OPERATION PROCEDURE PHOTOS Top Cover Screw Handle Screw Screw 1 Remove the top panel Valve Cover Screw Screw 1 Take out the screws of the top panel 2 Remove the top panel Screw Strengthen Plate 2 Remove the front panel Back Panel 1 Take out the screws of the front panel 2 Take out the screws of the strengthen plate and remove the Screw E 22 Screw strengthen plate 3 Take out the screws of the electrical control box Front Panel 4 Remove the front panel 3 Remove the electrical control box Screw 1 Take out the screws of the valve cover and remove the Screw valve cover 2 Take out the screws of the handle and remove the handle 3 Disconnect the electrical control box and the other parts 4 Take out the screws of the electrical control box 5 Remove the electrical control box Screw 38 11 DISASSEMBLY INSTRUCTIONS KFR 3502W BPE KFR 3601W BPE KFR 4001W BPE 4 Remove the back panel 1 Take out the screws of the back panel 2 Remove the back panel 5 Remove the fan fan motor fan supporter and the partition plate 1 Take out the screws of the fan and remove the fan
38. splayed 3 5 Total current overload protection Cooling mode Type KFR 3601GW BPE KFR 4001GW BPE KFR 3502GW BPE Work condition of compressor Item Current Voltage Current Voltage Current Voltage 2 32 6 8 1 86 2 73 8 3 restriction 3 14 9 8 2 68 Frequency down 4 10 12 0 3 28 Stop Type KFR 3601GW BPE KFR 4001GW BPE KFR 3502GW BPE Work condition of compressor Voltage Current Voltage Current Voltage 2 32 13 0 3 56 8 5 2 32 Frequency up 2 73 14 5 3 97 10 0 aga frequency up restriction 3 14 16 0 4 38 11 5 3 14 Frequency down 4 65 14 0 3 83 Stop 222 8 TROUBLESHOOTING 3 6 Abnormal power supply voltage protection When the supply voltage is above 260V or below 150V the compressor stops and the trouble code is displayed 3 7 Overhot protection for the indoor heat exchanger When the temperature of the indoor coil gt 70 C the compressor will stop When the temperature gt 55 C the outdoor flow speed will turn to the low speed and the compressor runs at the descending frequency When the temperature gt 52 C and lt 55 C the compressor will prohibit the frequency from rising 3 8 Anti frost protection for the indoor heat exchanger Refer to the cooling cycle 3 9 Momentary interruption protection for power supply When the power supply lacks the cycle or is interrupted the compressor stops running and t
39. t connect ed bet ween t he Reconnect or r et ect i on really hot indoor control board aS repl ace the wres and di spl ay boar d Y door coi 4 2 5 boar d tr oubl e of outdoor coi 1 N 9 Yes gt sensor troubl e the di spl ay and ace i t sensor correct d Yes Y Indoor control board troubl e and replace it Qut door control board and replace it Does t he troubl e di appear in 3 PMtroubl e appear Ye E frequent y Yes minutes Normal pr ot ect i on Assur e good Start up the air 4 condi ti 30 IPMtroubl appear I Yes Yes unit and minutes doen it frequent y good cont act wor k Norl y bet ween PM r adi at Y Normal prot ect i on v Fepl ace t he wave Repl ace t he PMtroubl e and filter board Does out door cont r ol s replace i t thls trouble I boar d Does t hl s di sappear troubl e di sappear Yes Ye Indoor control board Y Y i filer trouble trouble and replace it ve rou Qitdoor cont rol it kh A board trouble boar d t r oubl e 15 the resi st ance door cont rol of sensor correct Yes board trouble and
40. wres or connect ed repl ace it After aci ng the di spl board Is there Yes spl ay board t roubl e still troubl e Check t he transf or ner 15 resi stance of w ndi ng er repl aci ng Nb Repl ace t he transf or ner O short ci open the i ndoor Indoor control board circuit board Is there trouble still troubl e Yes 1 i ndoor control board short circuit Yes Indoor control board trouble After repl aci ng the di spl ay Yes spl ay board board I s there troubl e Nb still troubl e Check and find short circuit or open circuit anong other components such as transformer or fan notor Indoor cont r ol board 15 br oken and replace it Is the resi st ence Ye Repl ace t he i ndoor of sensor Nornal control board Yes Fepl ace t he tenperature sensor Is the resi st ence of sensor correct t control board Fepl ace t he i ndoor coil sensor 24 9 SERVICE FLOW CHART Is indoor heat exchanger freezed Indoor coil sensor Ye 15 conpressor still running Normal pr ot ect i on Yes Sw off the power st art up the air conditoner after the di Is indoor heat exchanger still freezed by chance Yes Swch off the power ace t he out door control board
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