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OUTDOOR UNITS Service Manual

1. 1 Indoor Unit Combination Multi DC Nominal Suggested Limit Multi DC Nominal Suggested Tres Outdoor Unit capacity Combination Outdoor Unit capacity Combination PA i 9 DUAL ZONE 18K Nominal dd oe NODE 18 9 12 m 12 12 2215 9 18 12 12 Multi Nominal Suggested Limit Outdoor Unit capacity Combination 12 18 9 18 18 12 9 9 9 18 9 9 12 9 9 9 9 18 9 12 9 12 12 QUAD ZONE There should be 36K Nominal 10 5kW None TRIPLE ZONE 9 18 only one Floor 9 12 18 27K Nominal KIRN Ceiling or Duct ominal 12 12 ei B uc 9418418 12 18 12 12 12 9 9 9 12 12 18 9 9 12 12 18 18 9 12 12 9 9 9 9 12 12 12 9 9 9 12 9 9 9 18 9 9 12 12 Multi DC Nominal Suggested 949412418 Outdoor Unit capacity Combination EIE 9 12 12 12 9 9 12 12 18 12 12 12 12 12 18 9 9 9 12 NOTICE This combination results in slightly reduced 9448 performance We recommend going one size up for the outdoor section for obtaining fully rated performance 12412 There should be TRIPLE ZONE only one Floor 30K Nominal 7 idis Ceiling or Duct 18418 unit 94949 949 12 9 9 18 9 12 12 9 12 18 12 12 12 2 Suggested Indoor Unit Model Numbers SUGGESTED INDOOR UNIT 12K YN018GMFI 16M2D SUGGESTED INDOOR UNIT 9K WBOO9GMFI16MLD WB012GMFI16MLD QCBO012GLFM6MLD eee QCB018GLFM6MLD YN027GMFI 16M3D eae SUGGESTED INDOOR UNIT
2. Yes Replace the outdoor main board Yes NO v Check whether the inductance of PFC module is good If the inductance is good the resistance of the two ports is O v Replace the PFC module Trouble is solved No Replace the inductance benere r LES dic EM 2 Two ports of the inductance 9 4 2 7 E8 Outdoor fan speed has been out of control diagnosis and solution Only for DC fan motor models When outdoor fan speed keeps too low 300RPM or too high 2400RPM for certain time the unit will stop and the LED will display the failure Wiring mistake Fan assembly faulty Fan motor faulty e PCB faulty Trouble shooting Shut off the power supply and turn it on 1 minute later Is it still displaying the error code Yes Y Find out the cause and have it solved For Shut off the power supply example check rotate the fan by hand No et ET EODD blocked or the bearing is broken The unit operates normally P di dw Yes Check the wires of fan motor Are all the No Correct the connections connections good Yes i If the Check whether the fan malfunction is Replace fan motor is normal through No Still existing motor index 1 repl
3. B N e 1 9 f H de i a m n 2 25 I ELCH f 12 gt f 7 2 2023021 306 3 Ta Bo im 4 3L LX 7 UJ 13 t Z Vi S PIC3 Main board LED when power on and unit standby PIC 4 Check point button press 1 time for check how many indoor units are connected 9 4 2 3 E3 Communication malfunction between IPM board and outdoor main board error diagnosis and PCB main chip does not receive feedback from IPM module during 60 seconds Wiring mistake faulty Trouble shooting Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light No v Check the signal wire between the IPM module and the main Yes board is it connected good No Yes Reconnect and retry Is error still display No No Replace IPM board and then check whether the Yes system can run normally No Replace outdoor main board and then check Yes RI whether the system can run normally No Y y Replace control Trouble is solved gt 5 gt gt 2 D 9 Remark Use a multimeter to test the DC voltage between black pin and
4. EXCHANGE temp sensor Se CONDENSER T2B A Evaporator T2 Evaporator 0 GAS VALVE A temp sensor outlet temp sensor 152 0 dw middle Aa Lan i TV 4WAY VALVE px T2B B T ZS i S GAS VALVE 2j eL lt N 4 Accumulator f oT5 Discharge 7 temp sensor Compressor COOLING HEATING 5 2 Refrigeration circuit drawing of inverter triple zone 3 zones INDOOR OUTDOOR LIQUID VALVE A eee KY KI TAN a gt UJUUUV EXV B CAPILIARY B LIQUID VALVE B T CHECKVALVE V ee eps FO d N LL 00000 4 00000 EXV C CAPILIARY C y Is LIQUID VALVE C Zl Condenser See oda LTT a gt 09 7000007 TUBE temp sensor EXCH V V HEAT EXCHANGE V EVAPORATOR 111 Room TeAmbientD EXCHANGE temp sensor CONDENSER T2B A Evaporator GAS VALVE temp sensor outlet T2 Evaporator 0 KAD gt temp sensor a AN middle T2B B i INE NL COSME Be Y A 4 WAY VALVE we X Ege m i LN GAS VALVE C E p dames Accumulator A 4T5 Disch AK 4 Nj ISC arge 77 temp sensor COOLING Compressor 4 HEATING 5 3 Refrigeration circuit drawing of inverter quad zone 4 zones INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE 21 a n EN 22255 99000 EXV B CAPILIARY B LIQUIDVALVE Bg T O XK ki 00000 CHECK VALVE LM
5. Input Terminal P Red Red 1 _ j lt Black 2 __ gt White White 3 Black Red 3810 8 20 3420 8 20 183 60 8 20 C 1800 8 20 C BE Brand Weiling Brand Dayang Brand Weiling Brand Wolong White Black 2670x896 20 2530x896 20 2060x896 20 C 1900 8 20 BE Brand Weiling Brand Dayang Brand Weiling Brand Wolong Measure the resistance value of each winding by using the tester Input Terminal B Blue Brown M Yellow Red Blue Ho j Black Brown p Resistance Value YDK70 6FB YDK180 8GB YSK27 4G YSK68 4B YDK45 6B YSK25 6L a 560x896 20 24 50 8 20 3170x896 20 1450 8 20 3450 8 20 6270x896 20 88 50 8 20 i Red 760 8 20 190 8 20 2520 8 20 880x896 20 1500x896 20 374 30 8 20 1380x896 20 Yellow C C C C i C 760x896 20 190 8 20 2520x896 20 880x896 20 1500x896 20 374 30 8 20 1380 8 20 C 5 4 way valve 1 Power on use a digital tester to measure the voltage when the unit operates in cooling it is OV When the unit operates in heating it is about 230VAC If the value of the voltage is not in the range the PCB must have problems and need to be replaced 2 Turn off the power use a digital tester to measure the resistance The value should be 1 8 2 5 KO
6. CN11 CN13 CN18 CN19 CN20 CN21 CN27 CN28 CN29 CN30 4 Compressor grounding wires of PCB 8 Remove the PCB board How to remove the compressor 1 Perform work of item 1 2 3 Remove the electrical control box and partition plate Extract refrigerant gas Remove the sound insulation material and crankcase heating cable Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal Remove the discharge pipe and suction pipe with a burner Remove the hex nuts and washers fixing the compressor to bottom plate Lift the compressor How to remove the 4 way valve 1 Perform work of item 1 2 2 Extract refrigerant gas Remove the electrical parts from item 3 Remove fixing screw of the coil and remove the coil Detach the welded parts of 4 way valve and pipe The How to remove the expansion expansion gave valve 1 Perform work of item 1 2 Remove the electrical parts from item 3 Remove the coils Expansion valves Detach the welded parts of expansion valves and pipes 10 Exploded Views Available under a separate document file
7. No Correct the connections Yes Replace indoor or outdoor PCB No Y Replace the sensor 9 4 1 6 IPM module or IGBT over strong current protection diagnosis and solution When the voltage signal that IPM send to compressor drive chip is abnormal the display LED will show P6 and AC will turn off Wiring mistake IPM malfunction Outdoor fan ass y faulty Compressor malfunction Outdoor PCB faulty Trouble shooting IPM module protection Check whether the voltage range of P N on IPM module is normal DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h heck whether the input power supply is correct 208 230V 1N 60Hz Regulate it to correct theri check whether the system can work normally No Yes heck whether the connecting line between main board and the IPM module is connected tightly Connect it tightly check ok or not Check whether the power supply line is connected correctly and tightly Connect it correctly and tightly check ok or not Yes Yeg No eck whether the connecting line of the compressor is onnected correctly or tightly Connect it well check ok or not Check whether the line in E part box are connected tightly Connect it tightly check ok or not Yes D Check wh
8. 6 EXV check Disconnect the connectors 1 white 2 Yellow 3 Orange 4 Blue 9 Brown 6 Red Red Brown Blue Orange YellowW amp yhite 9 Resistance to of lead wire Normal Value Red Blue Red Yellow About 500 Brown Orange Brown White Red Blue Red Yellow Brown Orange Brown White 9 Disassembly Instructions gt Model YN018GMFI16M2D No Part Procedures How to remove the panel plate Screws of top cover 1 Panel plate gt 1 Stop operation of gt C the air conditioner and turn E S 2 OFF the power breaker Screws of froht panel Remove the screws of top Screws of right front side panel cover and remove the top Screws of top cover cover 9 screws Remove the screws of right od front side panel and remove the right front side panel 2 screws Remove the screws of front panel and remove the front Q panel 9 screws Screws of right 75 7 Screws of rear panel front panel Remove the screws of big _ 4 um handle and remove the big 2 7925 handle 4 screws F oS Remove two screws of T terminal board two screws of water collector and twelve E E 4 screws of right rear panel and remove the right rear panel Screws of big handle water collector How to remove the fan ass y 2 Fanassy 1 Remove the top cover right fron
9. 7 2 1 Input voltage 230V 22 VOLT LTM FREQ2 ADD 7 2 2 Input power frequency 60Hz Note if the low voltage protection is triggered and 7 2 3 Indoor fan normal working amp is less than not corrected within 3min it will keep the 1A protection even after restarting the machine 7 2 4 Outdoor fan Normal working amp is less 7 3 6 Compressor current limit protection than 1 5A If the compressor current exceeds the current 7 2 5 Four way valve normal working amp is less limit value for 10 seconds the compressor than 1A frequency will be limited as per the below table 7 3 Main Protection Cooling mode 7 3 1 Three Minute Time Delay at restart of the Curent Currentlimit Frequency limit compressor frequency Hz value A COOL F16 ICOOLLMT12 Decrease the frequency to 1min delay for the 1s time start up and 3 COOL F4 and run at COOL F4 8 COOL F15 ICOOLLMT11 for 3 minutes minutes delay for subsequent starts COOL 14 ICOOLLMT10 After that the frequency will be 7 3 2 Temperature protection of compressor adjusted according to the capacity demand and rise to the upper discharge v is level every minutes When the frequency COOL F4 COOL F12 ICOOLLMT8 via Capacity demand When the compressor discharge temp rises the running frequency will be limited per the below COOL F11 ICOOLLMT7 rules COOL F10 ICOOLLMT6 If 102 C Tp 115 C decrease the frequency to the lowe
10. eck whether the connecting line of the compressor is onnected correctly or tightly Connect it well check ok or not Check whether the line in E part box are connected tightly Connect it tightly check ok or not Yes EE RR Check whether the bridge rectifiers are normal Use the multimeter to measure the resistance between each two terminals check whether there is the condition that value of resistance is O Replace the IPM module check whether the system can work normally For M3OD 27HRDN1 M please refer to 9 5 Trouble Criterion Of Main Parts check whether the resistance of the fan motor is Yes Yes heck if the outdoor fari When the voltage signal that IPM send to compressor drive chip is abnormal the display LED will show P6 and AC will runs properly or the outdoor Replace the bridge rectifiers motor For other models refer to i 8 normal If not replace the fan nit ventilation is good the solution of fan speed has been out of control malfunction Find out the cause No and have it solved Check whether the connecting line of every reactor is normal If the line is broken the resistance of the two ports is models except for 4 36 1 M Check whether the PFC module broken for MAOC 36HRFN1 M Replace the main board check whether the system can work normally Yes No Replace th
11. PCB board 5 Disconnect following 5 pieces of connection wires and connectors between IPM and PCB L OUT red N OUT blue CN38 2p white CN21 5p white CN39 2p blue Remove the IPM board 7 Disconnect the connectors and wires connected from PCB and other parts Connectors CN17 T3 T4 temp sensor 2p 2p white CN7 Tdischarge temp sensor 2p white CN15 T2B A B C temp sensor 2p 2p 2p white CN18 CN19 CN22 Electronic expansive valve A B C 6p 6p 6p red red red CN25 CN23 CN20 S A S B S C 3p 3p 3p white white white Wires CN1 CN2 4 way valve blue blue CN5 CNG Crankcase heating cable red red CN3 L 1 IN red CN20 CN4 N IN black CN23 CN25 8 Disconnect the grounding wire yellow green after removing the big handle CN3 and the right rear panel 9 Remove the PCB board CN4 How to remove the compressor 1 Perform work of item 1 2 3 the control box and partition electrical Remove plate 3 Extract refrigerant gas the material sound Remove insulation and crankcase heating cable Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal Remove the discharge pipe and suction pipe with a burner Remove the hex nuts and washers fixing the compressor to bottom plate Lift the compressor 5
12. 9 3 2 Outdoor unit s digital display digits There is a digital display on outdoor PCB Digital display digits function e n standby the LED displays e n compressor operation the LED display the running frequency e n defrosting mode The LED displays dF or alternative displays between running frequency and dF each displays 0 55 e n compressor pre heating The LED displays PH or alternative displays between running frequency and PH each displays 0 5s e During the oil return process The LED displays or alternative displays between running frequency and RO each displays 0 55 e n low ambient cooling mode the LED displays LC or alternative displays between running frequency and LC each displays 0 55 e n forced cooling mode the LED displays FC or alternative displays between running frequency and FC each displays 0 55 e When PFC module protection occurs three times within 15 minutes the LED displays E6 or alternative displays between running frequency and 6 each displays 0 55 e n protection or malfunction the LED displays error code or protection code 9 3 3 Outdoor unit error display Display EO E2 ES E4 ES E6 E8 F1 F2 F3 F4 PO P1 P2 P3 P4 P5 P6 IDU IDU LED STATUS Error Error Wall Mt Others Outdoor EEPROM malfunction E5 E6 Communication malfunction between indoor and outdoor units E1 E2 Commun
13. VALVE CN39 EUN i CN38 VALVE MAIN BUARD 4 WAY HEATI HEAT2 CN25 CN23 CN37 REACTOR e s EN W C CENZTNCLNZIDLNZTNZLNACTVNCLNATN INKLZINLZNLANLZN LAN LZINLZIN AINA QR LU 120 5 LIB 28 SB COMPRESSOR TN pere 170 B LL OTIINL 2 a POWER SUPPLY i Y G Y G PCB board of YN018GMFI16M2D LEW 0 LEU Boom E LEW Roam B LEU Room 12UDI pulse Wav mt 504405 CN3B ND g 4 signal reception 173 1 c ss Froma Bard 2 3 CN24 CMe T240 OS 4 3 Pulse wave CF MCN 5 3 BVDC Pulse weve Jan Em bras Det bus Tes rani 9 3 14 14 B8vDCIStanday 7 4 B Tvnc FRunning 86543 1 5 3 OVDC Standby 2 5 5 D Running LJ wae 4 3 15VDC Standby Ifa Fl pim mep o at CET EE E J ICE reve MES z CM3S Di A BB yas Je gel ie 583 L om n 1 68 p wit 2 270 370vDC x n RFE A dE Indoor plpe out EGET gt tamp T2B Le B o EA cia zs LIVES M eU ars VE 121 mn b I8 FAIT am Ll
14. 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates approximately 45Psi to 0 5 Mpa 7OPsi Tighten the flare nut fully 6 Disconnect the charge set and the charging cylinder and open both cores of the the 2 way and 3 way valves to fully open position Be sure to use a proper size hexagonal Allen wrench to operate the valve stems 7 Mount the valve stem caps and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the for gas leakages 3 Adding refrigerant if the pipe length exceeds length for factory pre charge pipe length value Procedure 1 Connect the charging hose to the charging cylinder open both the 2 way valve and the 3 way valve Connect the charging hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A make sure the cylinder is upside down to ensure liquid charge 2 Purge the air from the charging hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto an electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side
15. Is IP power LED or operating LED lamp On Refer PIC2 No gt change IPM Power on by remote controller Ils it still displaying the error code after 3 minutes Yes Is the reactor connecting well Is main board ELE lamp on Refer PIC 3 No Reconnect the wiring Yes v Change Outdoor Main PCB Yes indoor units number correct Check on the outdoor check point 2 for dual zone 3 for tri zone 4 for qua zone Refer PIC 4 Trouble is solved No ne second time 9 Change outdoor unit PCB assembly include wiring totally Pic 1 Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit The red pin of multimeter connects with L2 port while the black pin is for S port When AC is normal running the voltage will move alternately between positive value and negative value Pic 2 IPM for dual triple quad zone Power some modles Operating i num Jen tog p EM 5 Em i PIC3 Main board LED when power on and unit standby PIC 4 Check point button press 1 time for check how many indoor units are connected YN027GMFI16M3D Check point button press 18 times for check how many indoor units are connected for Others 9 4 1 3 zero crossing signal error diagnosis and s
16. Lamm ran T CN20 6 PS a d L__ 1 2 NIN MER UT TESE 198 264VAC 12V Puke wea INDOOR AND OUTDOOR COMMUNICATION C3 G THE POWER FOR INDOOR LM TTE c E s d Or 2 I nee EXTR ma Tage 284VAC TO RECTIFILER MILI 202302130885 EE EKFHELUZSDPTITTMICDZ MITA J10 0 0J H POWER SUPPLY iFa 81 di aas 5 65 tee IPM board of YNO18GMFI16M2D 1 3 12VDC 4 3 5VDC Pulse wave 5 3 5VDC Pulse wave 270 370VDC DC POWER 2 3 5vDC main board eus cia 45 s Y W Connect to the compressor voltage among phases Ia C re CJ r1 LJ te pp z casca gt z 4 n3 1 1 004900 em CE KFRBOH ZBP2T4NI 310LB1 D 13 MP1 v FT TELIDTT m 1 7 cas 2028 die pac sco D We pi co iF x 8 m Faz 2 8 Ce H 8 du E zu 9 5 3 S i Sca EO 3 ni N N gi Ji 1889 rn A m Connect to amulatan board 8 2 Wiring diagram of Triple Circuit outdoor unit YN027GMFI16M3D 20205 1301 78 Ee ri E H BLUE B i INDOOR PIPE sad UA QUT TEMP zi AK ee OUTDOOR ANE H P
17. TO TEMPERATURE SENSOR 1 b 5 E 1 IPM BOARD EN DISCHIRGE SENSOR CH f RONG MA sh 1 MAIN BOARD 778 UU fh 5 6 5 4 Ar 4 e mE 4 MAT HEATL HET ais EF mn IO mue uas cele C ED wi d 3 C gs Sz d REACTOR gt vie E pec m i FAN CAPACITOR qd Wer ne HAEE Cg eae COMPRESSOR PE Pa 3 a i Lae a en FS i Pel Le opem eme i i 3 1 1 A H c w S 5 d z 1 2 BLUE SCIRET 3 INDOOR PIPE 5 OUTDOOR AMBIENT 4440 Eg 4 TEMPERATURE SENSOR LOW HIGH T2B 5 C 13 CONDENSER TEMPERATURE SENSOR 0 p DISCHARGE SENSOR oo O mesig Se c VALVE 2 gt ELECTRONIC S 5 EXPANSIVE VALVE VALVE ee 5 IN N I 5 4 5 8 5 6 5 amp e AMAY HEATI HEAT2 N N S REACTOR U W C E V E UA ASA COMPRESSOR ARE Wo Ek ae T Ed OPTIONAL 1 POWER 1 BUE EM ve We PCB board of YN030GMFI16M3D LEV Reon D LEV C Room LEV Room 12UOC pulse wave lt Ex S EN N N SR AN Signal reception 1
18. on the charging set and charge the system with liquid refrigerant 6 When the electronic scale displays the proper weight refer to the table disconnect the charge hose from the 3 way valve s service port immediately and turn off the air conditioner 7 Mount the valve stem caps and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakages 6 5 Adding the refrigerant after running the system for many years Recommended only if the refrigerant being added does not exceed 10 of the total refrigerant amount Otherwise remove the remaining refrigerant entirely and recharge fully Procedure 1 Connect the charging hose to the 3 way service port open the 2 way valve and the 3 Way valve Connect the charge hose to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder is upside down to ensure liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto an electronic scale and record the weight 4 Operate the system at the cooling mode 5 Open the valve Low side on the charging set and charge the system with liquid refrigerant 6 When the electronic scale displays the proper weight refer to the gauge and the pressure of th
19. 9 12 0C gt 2 3 4 NNNM Gron PM board 2 3 sVDC CN24 12UUC lt lt CN 4 3 5VDC Pulue wave NO VN 5 3 SVDC Pulse wavu 021 29 2 itia 4 mac 7 TT 1c 6 3 14 14 8VDC Standby 7 4 6 1VDC Running ee i 5 3 OVDC Btandby 2 5 5VD Running 4 3 15VDC Standby 1 9 270 389 VDC Standby ma ui TERERAA t Er me r c NONE err t Connect to test board Cras o 3 M TewiPor t SF E CONTRDI dap t 2 w 783 MEI 8 ER n sul 1 a HEAT2 m U 202302130895 MIDNAN D SRA W amme 4 ED IPM board of YN030GMFI16M3D nin mu EIL d acil 1 e COE SOC wer Velo Tie MB oS HER os NE cae ra 1 4 U 3513 E US 4 PRESS un Connect to simulation board ite 8 S m NI ma DILE T SN SN F SS e Hu PLUIE io c AN 1 202302130880 LL KI HBOLIZBD214N1 3LULBIJ D 13 M21 icy im Rit oog 11 m um b Tu NAN ms ca U W 173 12VDC Conncot to the compressor 2 3 SvDC voltage among phases main board 4 3 SVDC Pulse wave 0 200VDC 7VOC
20. Input Terminal A Red x T Red 1 b Black 2 gt White V N f N White 3 ee N Black i b B 2 Indoor DC fan motor control chip is inside fan motor Power and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must have problems and need to be replaced For other models K o CX N I M OXON COS For console DC motor voltage input and output For Cassette Ducted Floor Ceiling except console Signa Voltage Red VsVm 192V 380V NN NEN Bak GND ov Vsp FG OV Yelow vs 0 658V _ Bu FG wv E 9 4 1 5 open or short circuit of temperature sensor diagnosis and solution If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Wiring mistake Sensor faulty faulty Trouble shooting Check the connections between temperature sensor and PCB Are the connections good Yes Check the resistance value of the sensor via Appendix 1 and Appendix 2
21. and remove the top 71 cover 7 screws Remove the screws of right front side panel and remove the right front side panel 2 screws Remove the screws of front panel and remove the front Screws of right front side panel panel 10 screws Remove the screws of big 4 handle remove the big gc handle 2 screws f Remove two screws of 5 terminal board and eleven BN p j screws of right rear panel che pee 4 ds P 3 3 and remove the right rear a 7 P WE Screws panel Bat 2 A 2 AE He terminal board Screws of EM panel Screws of water collector Screws of top cover crews of right LE LJ 2 LJ 2 Fan ass y Electrical parts How to remove the fan ass y 1 Remove the top cover right front side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan 3 Remove the fan 4 Remove the electrical control box cover 5 Disconnect the fan motor connector CN37 5p white from the PCB board 6 Remove the fan motor after unfastening six fixing Screws How to remove the electrical parts 1 Perform work of item 1 2 2 Remove the ten screws fixing the IPM board 3 Unfasten the connector of the reactor 4 Unfasten the connector of the compressor pope Te a Secs m IPM board
22. be charged with little amount at a time approx 150g 5 Ozs each time while operating the air conditioner in the cooling cycle wait approx 1 minute and then repeat the procedure o When the electronic scale displays the proper weight disconnect the charge hose from the 3 way valve s service port immediately If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 6 Mount the valve stem caps and the service port cap Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakages 6 Electronic Function 7 3 4 Inverter module Protection 7 1 Abbreviation Inverter module protection has protection functions against current voltage and T1 Indoor ambient temperature temperature If these protections are triggered the corresponding code will display on indoor unit T2 Coil temperature of indoor heat exchanger s LED and A C will stop The unit will recover 3min mid point after the protection conditions disappear T2B Coil temperature of indoor heat exchanger s 7 3 5 Low voltage protection outlet T3 Pipe temperature of outdoor heat exchanger 922 7 No limit T4 Outdoor ambient temperature VOLT RST1 ADD VOLT LTM1 ADD Compressor discharge temperature VOLT_LTM_FREQ1_ADD VOLT RST2 ADD 7 2 Electric control working environment VOLT LTM2 ADD
23. from EEPROM chip Installation mistake PCB faulty Trouble shooting Outdoor EEPROM malfunction Yes If the EEPROM chip is welded on PCB replace the PCB directly Otherwise check whether the EEPROM chip plugged in PCB well No Insert the EEPROM well Replace the outdoor main board EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage For the location of EEPROM chip please refer to the below photos ln Outdoor PCB M3OC 30HRFN1 M 9 4 2 2 E2 Communication malfunction between indoor and outdoor units error diagnosis and solution Indoor unit does not receive the feedback from outdoor unit during 120 seconds or outdoor unit does not receive the feedback from any one indoor unit during 180 seconds Wiring mistake Indoor or outdoor PCB faulty Trouble shooting Indoor outdoor units communication error Start Power off then Power on ihe A C by the Breaker reconnect the power wire Is it still displaying the error code Yes heck wiring on the outdoor and indoo terminal follow the wiring diagram Is all connecting correctly No gt Reconnect the wiring No n Q Reconnect the wiring Yes Measure Vs is it moving alternately between positive value and negative
24. main PCB No Yes Y Replace the main PCB Check whether the main PCB is normal through index 2 No The malfunction is solved Yes Index 1 1 Indoor AC fan motor Measure the resistance value of each winding by using the tester Input Terminai Red E 4 Black 2 A White White 3 oL v O Black For the definite value of the resistance refer to 9 5 Trouble Criterion Of Main Parts gt 2 Indoor DC fan motor control chip is inside fan motor Measure the resistance value of each winding by using the tester If any resistance value is zero the fan motor must have problems and need to be replaced For console amp ARS ge e e NS 2 e pL 252 For other models 6 Bue _ 123456 Index2 1 Indoor AC fan motor Power on and set the unit running in fan mode at high fan speed After running for 15 seconds measure the voltage of pin1 and pin2 If the value of the voltage is less than 100V 208 240V power supply or 50V 115V power supply the PCB must have problems and need to be replaced D EN
25. multi meter Appendix 1 Temperature Sensor Resistance Value Table 115 266 108 146 101 517 96 3423 89 5865 84 2190 79 3110 74 5360 12 70 1698 a 39 58 7079 56 3694 49 3161 46 5725 3 3 E 3 35 2024 33 3269 31 5635 29 9058 28 3459 26 8778 25 4954 22 5662 21 8094 3 1 2 3 4 5 es SD 18 7177 59 89 9 12 13 14 16 9341 20 21 22 23 24 25 29 30 31 32 33 34 35 11 980 um EUN NE WEN E NN NE NN LINGE ij 40 41 42 43 44 45 46 50 51 52 5 54 55 56 12 6431 12 0561 11 5000 10 9731 10 4736 10 000 9 55074 9 12445 8 71983 8 33566 7 97078 7 62411 7 29464 6 98142 6 68355 6 40021 5 17519 4 96392 4 76253 4 57050 4 38736 4 21263 4 04589 3 88673 3 73476 3 58962 3 45097 3 31847 3 19183 3 07075 2 95896 2 84421 2 73823 2 63682 2 53973 2 44677 61 62 63 64 65 e 70 71 72 73 74 75 81 82 83 84 85 91 92 93 94 95 399 9 2 35774 2 21249 2 19073 2 11241 2 03732 1 96532 1 89627 1 83003 1 76647 1 70547 1 64691 1 59068 1 53668 1 48481 1 43498 1 38703 1 17393 1 13604 1 09958 1 06448 1 03069 0 99815 0 96681 0 93662 0 90753 0 87950 0 85248 0 82643 0 80132 0 77709 0 75373 0 73119 0 70944 0 68844 0 66818 0 64862 100 101 102 103 104 105 106
26. port cap to a torque of 18N m Be sure to check for gas leakage 2 Air purging by the refrigerant Procedure 1 Confirm that both the 2 way and 3 way valve cores are set to fully closed position 2 Connect the charging set and a charging cylinder to the service port of the 3 way valve Leave the valve on the charging cylinder closed 3 Air purging Open the valve on the charging cylinder and valve of the charging set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat this for 3 more times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check for any gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3Mpa 45Psi to 0 5 Mpa 70Psi 6 Disconnect the charging set and the charging cylinder and set the 2 way and 3 way valve cores to the fully open position Be sure to use a proper size hexagonal Allen wrench to operate the valve stems 7 Mount the valve stem caps and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 6 7 Re installation while the outdoor unit needs to be repaired 1 Evacu
27. shooting Current protection of compressor Judge 1 Check whether the input current of the power supply wire is more than 12 5A 18K For No Replace outdoor main board 27K it is 17 For 30K it is 18 5 For 36K it is 23A Yes Y Check whether the refrigerant system is ok Judge 2 Check whether the outdoor ambient temperature is higher than 50 C v Yes Stop the unit d Judge 3 Check whether the outdoor unit is bad ventilation Yes Make the outdoor unit ventilate well Judge 4 Check whether the heat exchanger is dirty Yes Clean the heat exchanger dq p No v Let the refrigerant out then use the high pressure Yes nitrogen or refrigerant to blow pipe vacuumize and charge the refrigerant again Judge 5 The refrigerant pipe is blocked No Replace outdoor main board and check whether the Yes system can run normally No y Replace the electric control box Se Trouble is solved 9 4 2 12 PA Temperature protection of compressor discharge error diagnosis and solution When the compressor discharge temperature Tp is more than 115 for 10 seconds the compressor will stop and restart till Tp is less than 90 Refrigerant leakage Wiring mistake The discharge temperature se
28. white pin of signal wire The normal value should be around 5V Use a multimeter to test the DC voltage between black pin and red pin of signal wire The normal value should be around 12V 9 4 2 4E4 open or short circuit of outdoor temperature sensor diagnosis and solution F1 F2 F3 F4 F5 open or short circuit of indoor coil temperature sensor diagnosis and solution on If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Wiring mistake Sensor faulty PCB faulty Trouble shooting Check the connections between temperature sensor and PCB Are the connections good Yes the resistance of the sensor via Appendix 1 and Appendix 2 No v Correct the connections Yes Replace indoor or outdoor PCB No Y Replace the sensor 9 4 2 5 E5 Voltage protection error diagnosis and solution An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit Power supply problems System leakage or block PCB faulty Trouble shooting Voltage protection No v Check the power supply between L L1 and N L2 is about 187 253VAC Check ios voltage of outdoor unit power supply whether the voltage EM Yes v Check
29. 0P adjustment range is 100 350p When the unit starts to work for 3minutes the outdoor will receive indoor units of capacity demand T2 information and calculate the average of them After comparing each indoor s T2 with the average the outdoor gives the following modification commands If the T2 2 the relevant valve needs 16p more close If average 2zthe T22 average 2 the relevant valve s open range remains If the T2 average 2 the relevant valve needs 16p more open This modification will be carried out every 2 minutes 7 4 5 Four way valve control In heating mode four way valve is activated In defrosting four way valve operates in according to defrosting action In other modes four way valve is deactivated When the heating mode to other modes the four way valve goes off after compressor is off for 2 minutes Failure or protection not including discharge temperature protection high and low pressure protection four way valve immediately turns off 7 Wiring Diagrams 8 1 Wiring diagram of DUAL Circuit outdoor unit YN018GMFI16M2D OPTIONAL 202057090167 Bo mew2lT T EZ m INDOOR PIPE ima 5 zz OUT TEMP MERE Ay PO OUTDOOR AMBIENT Em 14 TEMPERATURE SENSOR CT1 C T3 CONDENSER LOW HIGH TEMPERATURE SENSOR E 3DISCHARGE SENSOR IPM BOARD CN21 VALVE 2 ELECTRONIC EXPANSIVE
30. 1 9 Inverter compressor drive error diagnosis and solution The trouble shooting is same with one of IPM module protection PO 9 4 1 10 Full Water malfunction diagnosis and solution For cassette A5 duct If the sampling voltage is not 5V the LED will display the failure Wiring mistake Water level switch faulty Water pump faulty Indoor PCB faulty If the water level switch ub No is inserted well Insert the water level switch well v Yes Y If the water level switch is broken Yes Replace the water level switch No If the water pump is No normal v Replace the water pump Check PCB board or replace the indoor main PCB 9 4 1 11 Mode conflict 555 Cooling mode Heating Mode Cooling mode The indoor units cannot work cooling mode and heating at same time Heating mode has a priority Suppose Indoor unit A working in cooling mode or fan mode and indoor unit B is set to heating mode then A will change to off and B Will work in heating mode Suppose Indoor unit A working in heating mode and indoor unit B is set to cooling mode or fan mode then B will change to stand by and A will be no change No No mode conflict Yes Mode conflict 9 4 2 Outdoor unit trouble shooting 9 4 2 1 EO0 Outdoor EEPROM malfunction error diagnosis and solution PCB main chip does not receive feedback
31. 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 0 62973 0 61148 0 59386 0 57683 0 56038 0 54448 0 52912 0 51426 0 49989 0 48600 0 47256 0 45957 0 44699 0 43482 0 42304 0 41164 0 40060 0 38991 0 37956 0 36954 0 35982 0 35042 0 3413 0 33246 0 32390 0 31559 0 30754 0 29974 0 29216 0 28482 0 27770 0 27078 0 26408 0 25757 0 25125 0 24512 0 23916 0 23338 0 22776 0 22231 Appendix 2 ser s 59 wo 9 4 sus 2 6 amp 10 385 ar asso 2 s 6 35 46 ss 2 ss 324 _ 4e se 6 Ws 335 2 6 99 We 313 393 z 6 189 10 395 366 e 294 _ a 2 6 992 2 3w 3 7 959 10 2 _ zs s 4m om m 25 _ ze s 7 m 29 4 34 3 8 29 5 ws m ease m 249 zus sn 75 804 242 4 zms 3 3 7 7 amp 1 235 a 39 n 7596 m 224 _ a 3 7 ra 229 B I Qiole joiejoo o o m N N NI KSNIPSININ NINININININININI
32. 4 Remove the screws of big ao handle and remove the big handle 4 screws zii X Remove two screws of aV terminal board two screws zB Fare of water collector thirteen screws of right rear d panel and remove the right rear panel Screws of big handle S p Screws of right rear panel Screws of ater collector crews of terminal board Ts How to remove the fan ass y 2 Fanassy 1 Remove the top cover right front side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing E the fan 3 Remove the fan 4 Remove the electrical control box cover after remove 5 screws 5 Disconnect the fan motor connector CN25 5p white on the PCB board 6 Remove the fan motor after unfastening four fixing screws How to remove the electrical 3 Electrical parts parts Perform work of item 1 2 2 Disconnect the following connection Wires and PFC board UVW to compressor connectors on the IPM P red connected to P2 on PCB N blue connected to P4 on PCB UVW blue red black connected to compressor CN1 5p white connected to CN7 on PCB CN202 2p white connected to CN8 on PFC CN3 2p white connected to CN34 on PCB 3 Remove the IPM board after removing the two screws Screws of IPM board 4 Disconnect following c
33. 5 3 SVDC Pulsa PCB board of YN027GMFI16M3D LEU Boom LEU Boon LEU Room LEW Roon TA puls vave 1 72 4 quo HL 25 ed ret i io ma 21 5 IPM board of YN027GMFI16M3D C 0529991 8 gg A B Bi nm mcd if tlt E hi acit 1 4 778 wean 182 11 poi peice 12 AE 1524 NA AAA m 202302130830 LL KI HBULL BP21 4N1 31ULEBJ D 13 MPL 1 3 12VDC 2 3 SVDC main board 4 3 SVDC Pulse wave DC 5 3 SVDC Pulse wave voltage among phases D 200VDC 8 3 Wiring diagram of Quadruple 4 zone outdoor unit YNO36GMFI16M4D ELEG RON IG ELE TRONI ELEG TRON IG ELE TRON E C ERMENE EXPANSIVE e Lt A T i H Eg j i E 5 af 33 8 ERE CRA 6N20 p mmm Emm mnm mum mona E T B VALVE LVEF VALVES VELVET mirem Gps TE FRO BLUE RED ELAK 77 YELLOW B GES CE A CHN O E LAIN BOARD gt 5 LELELELELKI WE iii gi 4 Y i e REGTIF ILER2 E s do Y P s Pa L P 1 pol HHAH PFCMODULE 2 MH rm a E ap 25 c t 5 F 0G FAN a ie f th 2 vw w w E UU BLA E OPTIONAL HE ATER2 PCB board of YN036GMFI1
34. 50 30 100ft Additional 15g per 15g per 15 x length refrigerant Additional Additional for all rooms charge Meter Meter 30 OZ 0 16 Ozs per 0 16 Ozs per 0 16 Ozs per Additional Additional Additional Foot Foot Foot Caution Refrigerant pipe diameter differs according to indoor unit connected When extending the pipes refer to the tables below Evacuation using a vacuum pump Indoor unit Liquid side Outdoor unit 2222 T Two valve Close E el ya _ Gas side f Eu Three way valve ia Close Compound Ox Pressure L q q Handle LO T 9 U TT T Handle Hi Charge hose a Charge hose Vacuum pump Vacuum pump Completely tighten the flare nuts of the indoor and outdoor units confirm that both the 2 way and 3 way valves are set to the fully closed position Connect the low side hose of the charging manifold set to the 3 way valve s gas service port Connect the Middle hose of the charging manifold set to the vacuum pump Fully open the Low side valve of the charging manifold set Operate the vacuum pump to evacuate Make evacuation for 30 minutes and check whether the pressure gauge indicates as low as 0 1Mpa 14 5Psi If the meter does not indicate 0 1Mpa 14 5Psi after pumping 30 minutes keep the pump on for 20 minutes more If the pressure reading can not be obtained as low as 0 1Mpa 14 5Psi after pumping f
35. 6M4D 1 3 12vDC y cde EN T 1 D a gani A be jjo E B Does om 121 I LU KFR OHABP3TANI 3ID D D3 MPL P mlm 89 1 s a I 35V AC ET tFrem board ta LL E P2 4 3 15vDC Siandey 1 i T 1 3 270 399 Vv DO 35ndby NS 2 1 s Tu ts t a Hu FUSE 2b AC 18B 204VAC IPOWER SUPPLY 198 20 VAL TO RECTIFILER 6 3 14 14 8VDC Standby 7 4 8 TVDC Running 5 3 andy 25 3VDCRUuAning IPM board of YN036GMFI16M4D 21 11 20T2 L2 1R 29 Rece E L 201 2 1 3 12VDC 2 2 5VDC 4 3 5VDC Pulse wave 5 3 5VDC Pulse wave 17 VDC To PFC board U V W EICI C nein JA Ww lo T 0 200VDC P N 270 380VDC 1 7UDC DC POWER CTo main board No use 2 5 e Bo fd D 57 qmi us ES CE KFR1OSU BP2T3N1 31DC767 D 13 2 1 PFC board of YN036GMFI16M4D To main beard H12 Pio E1 i El3 EZ owe alll tial RG P rg na AF KFram IPM boardi 1 UDC 2024021240428 amp 71 6 1 1 1 1 8 Troubleshooting 9 1Safety Because there are capacitors on the PCBs and relative circuitry in outdoor units even after shutting d
36. 80P 480P for 240s Condition of ending defrost mode If any one of following items is satisfied defrosting will stop and the system will switch to normal heating mode According to the final capacity request to confirm the operating frequency as per the D gt TempQuitDefrost ADD C following table 2 The defrosting time reaches 10min Frequency Hz HEAT HEAT HEAT HEAT _F1 F2 _F15 F16 3 Turning any other modes on or off Amendatory capacity demand Heating capacity improvement in low ambient heating In heating mode when T2 T2 ExitTALowFre ADD and T4 4 there s frequency elevation elevated frequency Recent frequency 110 7 4 3 Outdoor fan control 7 4 3 1 Cooling mode For YNO27GMFI16M3D 141 25 Low When low ambient cooling is valid T4 4 High 27 2 25 20 i Y low ambient cooling Y For YNO18GMFI16M2D YNO30GMFI16M3D and YNO36GMFI16M4D DC_FAN_HI_SPD_ADD DC FAN MID SPD ADD DC FAN MIN SPD ADD DC FAN SLOW SPD ADD DC FAN SSLOW SPD ADD Outdoor fan speed control logic low ambient cooling When 4 15 and lt 30 C the unit will enter into low ambient cooling mode The outdoor fan will choose its speed according to T3 When T3238 or when T4220 the outdoor fan will choose its speed according to T4 again 131 Exit low ambient cooling mode with hi
37. N N 1 98 s 9 9 5 We 1 _ CO te 4 m 9e m 5s s 4 os a se l 1 am s s 9 9e 9 3 w ne 5 e 9 3 CO O1 O1 O1 O17 O1 O1 OO CO N AJOIN Appendix 3 10 11 12 13 14 15 16 17 18 19 20 21 22 F 48 50 52 54 56 58 60 62 64 66 68 70 72 C 23 24 25 26 27 28 29 30 31 32 33 34 35 74 76 78 80 82 84 86 88 90 92 94 96 98 2 Compressor check Measure the resistance value of each winding by using the tester Input Terminal Blue 5 UN Blue 2 2 Red 2 EIS zu Black Black 3 un L on Red DA130S1C 20FZ DA150S1C 20FZ DA250S2C 30MT TNB306FPGMC L Blue Red 0 950 20 0 950 20 0 550 20 0 530 20 3 IPM continuity check Turn off the power let the large capacity electrolytic capacitors discharge completely and dismount the IPM Use a digital tester to measure the resistance between P and UVWN UVW and N Normal Digital tester resistance value s EE Several MQ N Several MQ 4 AC Fan Motor Measure the resistance value of each winding by using the tester Normal resistance value Digital tester Pd
38. O E1 E2 B3 E4 E5 E6 E7 F5 PO P1 P2 P4 P5 ODU Error code P6 4 E8 E5 PO P3 9 3 Outdoor Unit Display 9 3 1 Outdoor unit error code function There is a system check switch on the outdoor PCB Push the switch SW1 to check the status of unit when the unit is running The digital display will display the codes based on the following procedures after pushing the SW1 each time SW1 Display Remark Normal display Display running frequency running state or malfunction code No of indoor units in good connection Actual data Outdoor unit running mode code Off 0 Fan only 1 Cooling 2 Heating 3 Forced cooling 4 A indoor unit capacity B indoor unit capacity The capacity unit is horse power If the indoor unit is not connected the digital C indoor unit capacity display digits will show D indoor unit capacity 9K 1HP 12K 1 2HP 18K 1 5HP E indoor unit capacity Not Applicable A Indoor unit capacity demand code C B Indoor unit capacity demand code C Indoor unit capacity demand code Norm code HP 9K 1HP 12K 1 2HP 18K 1 5HP D Indoor unit capacity demand code E Indoor unit capacity demand code Outdoor unit amendatory capacity demand code Forced cooling 7 The frequency corresponding to the total indoor units amendatory capacity demand 1 12 1 14 1 16 The frequency sending to compressor control chip A indoor unit evaporator outlet temp T28A B indo
39. Reactor How to remove the reactor 1 Perform work of item 1 2 Unfasten the connector between IPM and reactor Remove four screws of cover of inductance and remove the cover of inductance Disconnect two pieces of wires connected from the cover of inductance Remove two screws of reactor and remove the reactor The 4 way How to remove the 4 way valve valve 1 2 Perform work of item 1 2 Extract refrigerant gas Remove the electrical parts from item 3 Remove fixing screw of the coil and remove the coil Detach the welded parts of 4 way valve and pipe Screws of cover of inductance The How to remove the expansion expansion valve 1 valve Perform work of item 1 2 Remove the electrical parts from item 3 Expansion Remove the coils valves Detach the welded parts of expansion valves and pipes gt Model YN036GMFI16M4D No Partname Procedures How to remove the panel plate Screws of top cover 1 Panel plate 1 Stop operation of o EE om the air conditioner and turn OFF the power breaker Screws of front panel NI Screws of right front side panel Remove the screws of top Screws of top cover cover and remove the top cover 8 screws Remove the screws of right 4330 front side panel and remove the right front side panel 2 screws om Remove the screws of front panel and remove the front panel 10 screws
40. WB009GMFI16MLD WB012GMFI16MLD QCBO012GLFM6MLD eae MIMD eee EMM Eo SPee UB018GMFI16MLD YN030GMFI 16M3D SUGGESTED INDOOR UNIT ENSE WBOO9GMFI16MLD WBOO9GMFI16MLD_ UB018GMFI16MLD YNO36GMFI 16M4D 3 Dimensions Of the Outdoor Units Air inlet cs Air M A Dimension mm In Model W1 A B YNO18GMFI16M2D 845 33 3 320 12 6 700 27 6 908 35 7 560 22 335 13 2 YNO27GMFI16M3D YNO30GMFI16M3D 900 35 4 315 12 4 860 33 9 980 38 6 590 23 2 333 13 1 YNO36GMFI16M4D 990 39 345 13 6 965 38 1075 42 3 624 24 6 366 14 4 4 Refrigerant Cycle Diagram 5 1Refrigeration circuit drawing of inverter dual zone 2 zones INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A Im VALVE NEM VUVVV x lt EXV B CAPILIARY B W LIQUID VALVE B MM T3 552 Xo revo LASS L Y Condenser ie OS lt gt VVVVNV t rj temp sensor CAPILIARY TUBE HEAT EXCHANGE V EVAPORATOR ol Room
41. XC Y _ EXV CAPILIARY 4 00000 5 NAT PS gt T3 ee A AERE 60000 Condenser EXV D CAPILIARY D g temp sensor LIQUID VALVE D and CAPILIARY TUBE BB VIEN E HEAT T4 Ambientn EVAPORATOR 1 temp sensor EXCHANGE N temp sensor CONDENSER T2B A Evaporator GAS VALVE A temp sensor outlet N A go T2 Evaporator 0 ols Qu temp sensor GAS VALVEB 1288 4 i S10 middle gt lt i TAIN W e 4 WAY VALVE uibs GAS VALVEC 28 Accumulator 7 pressure eo MN ee eR 4 COOLING a Discharge 4 as Low pressure 7 __ temp sensor switch Compressor 5 Installation Details When refrigerant pipe diameter is different 6 1 Wrench torque sheet for installation from that of outdoor unit union for 12K and Torque Additional tightening 18K indoor units additional brass adapter Sue union supplied needs to be used on outdoor 9 52 3 8in 2500N cm 18 Lbf Ft 2600N cm 19 Lbf Ft Pipe diameter Extension pipe diameter 12 7mm 1 2in 3500N cm 26 Lbf Ft 3600N cm 27 Lbf Ft mm inch ToU 6 35 1 4 6 35 1 4 9 52 3 8 9 52 3 8 Teen 6 35 14 6 35 14 12 7 1 2 12 7 1 2 6 2 Connecting the cables Outdoor unit union diameter mm inch 6 35 1 4 Indoor un
42. YN M SERIES MULTI SPLIT SYSTEM MULTI CIRCUIT OUTDOOR UNITS 2 3 AND 4 ZONES SERVICE MANUAL Y T TAN aus CON DEN SIN G UN 5 Parker Davis HVAC International Inc mi 2260 NW 102nd Place Doral FL 33172 Revision B ODMI C1 1310 Ph 305 513 4488 info pd hvac com Model Numbers YNO18GMFI16M2D Dual YNO30GMFI16M3D Trio YNO27GMFI16M3D Trio YNO36GMFI16M4D Quad Table of Contents 1 Product Specifications 2 Indoor Unit Combination 3 Suggested Indoor Unit Model Numbers 4 Dimension Of Outdoor Unit 5 Refrigerant Cycle Diagram 6 Installation Details T Electronic Function 8 Wiring Diagrams And Electrical Trouble Shooting 9 Disassembly Instructions 10 Exploded View WARNING e Installation MUST conform with local building codes or in the absence of local codes with the National Electrical Code NFPA70 ANSI C1 1993 or current edition and Canadian Electrical Code Part1 CSA C 22 1 information contained in the manual is intended for use by a qualified service Lemgo technician familiar with safety procedures and equipped with the proper tools and test instruments Intertek e Installation or repairs made by unqualified persons can result in hazards to you and others e Failure to carefully read and follow all instructions in this manual can result in equipment malfunction property damage personal injury and or death 10 11 CONTENTS m
43. ace the 1 Yes Y Replace the main PCB Check whether the main PCB is normal through index 2 No gt The malfunction is solved Yes Index 1 1 DC fan motor control chip is inside fan motor Measure the resistance value of each winding by using the tester If any resistance value is zero the fan motor must have problems and need to be replaced LS Fg ERAN 9 NS Go p Color NO IS C IE 6 Index2 1 DC fan motor control chip is inside fan motor Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must have problems and need to be replaced PENES M Il DC motor voltage input and output 1 Vs Vm 140 380V M20C 18HFN1 M amp M40C 36HRFN1 M 192 380V M3OC 30HRFN1 M s so s we We eses S Vep poe s Bw FG Uu 9 4 2 8 protection of compressor top err
44. ating the entire system CLOSE Procedure 1 Confirm that both the 2 way and 3 way valves are set to fully opened position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuate for approximately one hour Confirm that the low side pressure gauge indicates 0 1Mpa 14 5 Psi 4 Close the valve Low side on the charging set turn off the vacuum pump and confirm that the gauge needle does not move within approximately 15 minutes after turning off the vacuum pump 5 Disconnect the charging hose from the vacuum pump 2 Refrigerant charging Gas ee LE dis 3 way valve se 8 f n Procedure 1 Connect the charging hose to the charging cylinder open the 2 way valve and the 3 way valves Connect the charging hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A set the cylinder upside down to ensure liquid charge 2 Purge the air from the charging hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto an electronic scale and record the weight 4 Open the valve Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charged fully with the specified amount of refrigerant or can only
45. d oret eidbeer lel ers IIo PEE 3 T E TT E reer rere DD LLL LLLI IL a 4 suggested indoor Unit Model NUMbDers dni et a dotati d 5 Dimension 6 RelmoasrantiCvele Diadora et a et oa a a 7 nstalalom ee ee 8 6 1 Wrench torque sheet for installation pp 8 6 2 GConrecung ile cables uu EM ue UA 8 6 3 Fipe lengtanatheelevatllom m Rr TL rc ER 8 64 Installation Tor UNG cesi oou ast ute a a a 8 6 5 Adding the refrigerant after running the system for many years 10 6 6 Re installation while the indoor unit need to be 11 6 7 Re installation while the outdoor unit need to be repaired pp 12 Electroni UCL opc Mc or T HR 13 DONG 13 Fea Control WORKING 13 DETENER 13 CA Conicol dnd FUNCIONS ee e 15 DAO A 19 Troubleshoolo UN 31 SEIS M Co 31 9 2 Indo
46. e compressor check whether the system can work normally Yes Yes Replace the connecting line or reactor or replace the PFC module for MAOC 36HRFN1 M Trouble is solved 9 4 2 15 The cooling operation or heating operation does not operate 4 way valve faulty Check of 4 way please refer to part 5 in 9 5 Trouble Criterion Of Main Parts 9 4 2 16 When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit get warm EXV faulty Wire and tubing connected in reverse Check of EXV please refer to part 6 in 9 5 Trouble Criterion Of Main Parts 9 5 Trouble Criterion Of Main Parts Spec Model 9k Wall 12k Wall 18k Wall RPG20B RPG20B RPG28H Indoor fan motor YSK27 4G YSK68 4B 12k Cassette 18k Cassette WZDK37 38G WZDK37 38G 12k Floor Ceiling 18k Floor Ceiling Indoor fan motor Model MAIN d DA130S1C 20FZ DA150S1C 20FZ DA250S2C 30MT TNB306FPGMC L Outdoor fan motor WZDK50 38G YDK53 6FB B WZDK72 38G WZDK180 38G 1 1 Temperature sensor checking Disconnect the temperature sensor from PCB measure the resistance value with a tester NL 000 Tester Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp Tp sensor Measure the resistance value of each winding by using the
47. e low side disconnect the charging hose from the 3 way valve s service port immediately and turn off the air conditioner before disconnecting the hose 7 Mount the valve stem caps and the service port cap Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for any gas leakages 6 6 Re installation while the indoor unit needs to be repaired 1 Collecting the refrigerant into the outdoor unit k EP S Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position Be sure to use a properly sized hexagonal Allen wrench to operate the valve stems 2 Connect the low side hose of the charging manifold to the 3 way valve s gas service port 3 Air purging the charging hose Open the handle Lo side valve of the manifold slightly to purge air from the charging hose for 5 seconds and then close it quickly 4 Set the 2 way valve core to fully closed position 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1Mpa 14 5Psi 6 Set the 3 way valve core to the fully closed position immediately Do this quickly so that the gauge ends up indicating 0 3Mpa 43 5Psi to 0 5 Mpa 72 5Psi Disconnect the charging set and tighten the 2 way and 3 way valve s stem caps Use a torque wrench to tighten the 3 way valve s service
48. ening six fixing screws Note There are two kinds of screws Please pay attention to it when install the fan motor How to remove the electrical parts 1 Perform work of item 1 2 2 Remove the ten screws fixing the IPM board 3 Unfasten the connector of the reactor 4 Unfasten the connector of the compressor 5 Disconnect following 3 pieces of connection wires and connectors between IPM and PCB CN21 5p white L OUT red 2 N OUT blue gf ui 6 Remove the IPM board T Disconnect the ONIF connectors and wires connected from PCB and other parts Connectors CN17 T3 T4 temp sensor 2p 2p white CN7 Tdischarge temp sensor 2p white CN12 Ttop temp sensor 2p white CN15 T2B A B C temp sensor 2p 2p 2p white CN18 CN19 CN22 Electronic CN12 CN15 expansive valve 6p 6p 6p red red red CN25 CN23 CN20 S A S B S C 3p 3p 3p white white white Wires CN1 CN2 4 way valve blue blue CN5 CNG Crankcase heating cable red red CN3 L1 IN red CN18 CN19 CN22 CN4 L2 IN black 77 A 8 Disconnect the m Em grounding wire yellow green after removing the big handle and the right rear panel 9 Remove the PCB board CN1 CN2 CN5 CN6 How to remove the compressor 4 Compressor 1 Perform work of item 1 2 3 Remove the electrical control box and partition plate Extract refrigerant gas Remove the sound insulation ma
49. estart 3 minutes later 7 3 7 Indoor outdoor unit communication protection If the indoor units cannot receive the feedback signal from the outdoor unit for 2 minutes the system will stop and display the failure 7 3 8 High condenser coil temp protection When T3265 for seconds the compressor will stop while the indoor fan and outdoor fan will continue running When 3 lt 52 the protection will reset and the compressor will restart after 3 minutes 7 3 9 Outdoor unit anti freezing protection When 2 lt 0 C for 250 seconds the indoor unit capacity demand will be set as zero and reset to normal when T2B 10 7 3 10 Oil return Running rules 1 If the compressor frequency stays lower than RET OIL FREQ1 ADD for RET OIL TIME1 ADD the system will rise the running frequency to RET OIL FREQ2 ADD for RET OIL TIME2 ADD and then resume back to former frequency 2 During the oil return process the EXV will stay at 300p setting while the indoor units will keep the current running mode 7 3 11 Compressor preheating functions Preheating permitting condition If T4 outdoor ambient temperature 3 C when newly powered on or if T4 3C and compressor had stopped for over 3 hours the compressor heating cable will be activated Preheating mode A weak current flows through the windings of the compressor through its wiring terminal then the compressor stays heated while it is off P
50. ether the bridge rectifiers normal Use the multimeter to measure the resistance between each two terminals check whether there is the condition that value of resistance is O Replace the IPM module check whether the system can work normally For AC fan models please refer No to 9 4 Trouble Criterion Of Main Parts check whether the resistance of the fan motor is Yes Yes heck if the outdoor fan runs properly or the outdoor Yes gt the tan the bridge rectifiers doe d motor For DC fan models refer to DIEVEDMISHIDD LIS the solution of fan speed has been out of control malfunction Check whether the connecting line of Find out the cause and have it every reactor is normal If the line is solved broken the resistance of the two ports is No co models except for MAOC 36HRFN1 M amp M4OC 36HRDN1 M Check whether the PFC module broken for M4OC 36HRFN1 M amp 4 6 1 No Replace the main board check M whether the system can work normally Replace the connecting line or reactor or replace the PFC module for 36 1 Replace the compressor check whether the system can work normally Yes C Trouble is solved 9 4 1 7 Over voltage or too low voltage protection diagnosis and solution Voltage protection v Check the voltage of outdoor un
51. gh fan 38 for 1 minute 30 27 Low 23 off Y 7 4 3 2 Heating mode For YNO27GMF116M3D T4 14 Low 12 High For YNO18GMFI16M2D YNO30GMFI16M3D and YNO36GMFI16M4D DC FAN SSLOW SPD ADD DC FAN SLOW SPD ADD DC FAN MIN SPD ADD DC FAN MID SPD ADD DC FAN HI SPD ADD 7 4 4 Electronic Expansion Valve EXV Control 1 EXV will be fully closed when the power is first turned on Then EXV will stay at standby with 350P open and will open to target angle after compressor starts 2 EXV will close with 160P when compressor stops Then EXV will stay at standby with 350P open and will open to target angle after compressor starts 3 The action priority of the EXVs is A B C D 4 Compressor and outdoor fan start operation only after EXV is initialized 7 4 4 1 Cooling mode The initial open angle of EXV is 250P adjustment range is 100 350p When the unit starts to work for 3 minutes the outdoor will receive indoor units of capacity demand T2B information and calculate an average of them After comparing each indoor s T2B with the average the outdoor gives the following modification commands If the T2B average the relevant valve needs 16p more open If the T2B average the relevant valve s open range remains If the T2B average the relevant valve needs 16p more close This modification will be carried out every 2 minutes 7 4 4 2 Heating mode The initial open angle of EXV is 25
52. gital display tube digits will show singles digit and tens digit For example the digital display digits show 0 5 it means the compressor discharge temp is 105 degrees AD value of current The display value is hex number AD value of voltage For example digital display digits show Cd it means AD value is 205 EXV open angle for A indoor unit EXV open angle for B indoor unit Actual data 4 If the value is higher than 99 the digital display tube will show singles digit EXV open angle for C indoor unit and tens digit For example digital display tube show 2 0 it means the EXV open angle EXV le for D t EXV open angle for E indoor unit Bit7 Frequency limit caused by IGBT radiator Frequency limit caused by PFC The display value is hex number For Frequency limit caused by T4 example the digital u Frequency limit caused by T2 display digits show Frequency limit symbol 2A then Bit5 1 Frequency limit caused by T3 Bit3 1 Bit1 1 Bi It means frequency ee Frequency limit caused by Tp limit caused by Frequency limit caused by current ie ane coment Frequency limit caused by voltage 35 36 37 38 39 40 1 4 4 Average value of T2 Sum T2 value of all indoor units number of indoor units in good connection Outdoor unit fan motor state Off 0 High speed 1 Med speed 2 Low speed 3 Breeze 4 Super breeze 5 The last error or protection code 00 means no malfunction and protection
53. he EEPROM chip plugged in PCB well No gt Insert the EEPROM well Yes v Replace the indoor PCB Supposed causes EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage For the location of EEPROM chip please refer to the below photos 9 4 1 2 Communication malfunction between indoor and outdoor units diagnosis and solution Indoor unit does not receive the feedback from outdoor unit during 120 seconds Wiring mistake Indoor or outdoor PCB faulty Trouble shooting Indoor outdoor units communication error Start Power off then Power on the A C by the Breaker reconnect the power wire Is it still displaying the error code heck wiring on the outdoor and indoo terminal follow the wiring diagram Is all connecting correctly No Reconnect the wiring No Reconnect the wiring Yes Measure Vs is it moving alternately between positive value and negative value Vs is the voltage between S and L2 Refer Is all the wiring between terminal and Indoor PCB connect ok Turn on all indoor unit by remote controller Is all indoor unit display Yes Yes y Change the Indoor PCB lt eS 4 5 urn off the all indoor units
54. ication malfunction between IPM board and outdoor main board ETE Open or short circuit of outdoor temperature sensor T3 T4 T2B E5 E6 Voltage protection P1 PO PFC module protection Only for 1 EI Outdoor fan speed has been out of control Only for DC fan motor models LS No A Indoor unit coil outlet temp sensor or connector of sensor is defective No B Indoor unit coil outlet temp sensor or connector of sensor is defective mem E No C Indoor unit coil outlet temp sensor or connector of sensor is defective No D Indoor unit coil outlet temp sensor or connector of sensor is defective Temperature protection of compressor top Only for M3OD 27HRDN1 M P2 P3 P1 High pressure protection Only for 1 sis Low pressure protection Only for 36 1 ES Current protection of compressor UN eZ Temperature protection of compressor discharge High temperature protection of condenser IPM module protection PO E5 9 4 Diagnosis and Solution 9 4 1 Indoor unit trouble shooting 9 4 1 1 Indoor EEPROM malfunction diagnosis and solution eee PCB main chip does not receive feedback from EEPROM chip Installation mistake PCB faulty Trouble shooting Shut off the power supply and turn it on 1 minute later Is it still displaying the error code Yes If the EEPROM chip is welded on PCB replace the PCB directly Otherwise check whether t
55. ication malfunction between indoor and outdoor units X Indoor EEPROM malfunction o Outdoor fan speed has been out of control X IPM module protection Open or short circuit of T3 or T4 temperature sensor or Outdoor unit EEPROM parameter error o X Temperature protection of compressor top X Inverter compressor drive protection X o Mode conflict o Indoor fan speed has been out of control flash at 5 sec light ON X extinguished Oflash at 0 5 sec For CB Series Ceiling Cassette RB Series Ceiling Concealed Ducted and UB Series Floor Ceiling Flex Mount Indoor Units Operatio n xxx Timer x x xXx x x O x e De frost Alarm x x ME x x x x gt x x x x Xx Failure Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Communication malfunction between indoor and outdoor units Full water malfunction Indoor EEPROM malfunction IPM module protection Open or short circuit of T3 or T4 temperature sensor or outdoor EEPROM malfunction Outdoor fan has been out of control Indoor fan speed has been out of control Voltage protection Temperature protection of compressor top Outdoor unit over current protection Inverter compressor drive protection Mode conflict flash at 2 5 sec light ON X extinguished Oflash at 0 5 sec Note Digital display is only available for duct type Display E
56. it A B C D 9 52 3 8 The power cord connection should be selected according to the following specifications sheet 6 4 Installation for the first time Unt Air and moisture in the refrigerant system will Dual zone 18K outdoor unit create undesirable effects as listed below Tri zone 27K 30K outdoor unit Quad zone 36K outdoor unit Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrigerant circuit may freeze and block capillary tubing Moisture may lead to corrosion of parts in the 6 3 Pipe length and the elevation refrigerant system compressor failure Therefore the indoor units and the pipes between indoor and outdoor units must be leak For indoor unit and outdoor unit connection wire 16AWG is used for all connections Maximum piping length and height difference tested and fully evacuated to remove the air and ee length for all zones 30 100ft 45 150ft 60 200ft moisture from the system Max length for each zone 20 65ft 25 80ft 30 100ft Max height Leak Check Soap and Water Method difference Max height difference Ew NUM detergent on the indoor unit connections and outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping If bubbles exist the pipes have leakage Additional refrigerant charge eau charged for total pipe length 22 5 7
57. it power supply whether the voltage between L L1 and N L2 is about 187 253VAC Yes v Check whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V No Check the power supply No v Replace bridge rectifiers and then check whether the system can run normally Only for qua zone No lt v Replace IPM board and then check whether the system can run normally Yes No v Replace outdoor main board v rouble is solved 9 4 1 8 Temperature protection of compressor top diagnosis and solution If the sampling voltage is not 5V the LED will display the failure Wiring mistake Over load protector faulty System block Outdoor PCB faulty Temperature protection of compressor top Whether compressor Whether the connection is N No Reconnect and retest operates good Yes Yes Whether refrigerant circulation volume is normal Whether protector is normal If protector is normal resistance 0 No Replace the protector No Charge refrigerant Yes Y Replace the outdoor main PCB Whether abnormality is the same after gas charging No y Check refrigerant system such as clogging of capillary etc 9 4
58. m 3 B gt Expansion valves Remove the coils Detach the welded parts of expansion valves and pipes Model YN036GMFI16M3D No Partname Procedures Panel plate How to remove the panel plate 1 Stop operation of 5 the air conditioner and turn OFF the power breaker 2 Remove the screws of top cover and remove the top cover 9 screws Remove the screws of right front side panel and remove the right front side panel 2 screws of front panel Screws of right front side panel screws Screws of top cover Remove the screws of front panel and remove the front panel 9 screws Remove the screws of big handle and remove the big handle 4 screws Remove two screws of V terminal board two screws Screws ofrigt 74 Pe Screws of rear panel front panel of water collector and twelve screws of right rear panel and remove the right rear panel Z Screws of big handle amp _ IE N 7 3 right rear panel Screws of E water collector 202 a i How to remove the fan ass y dd i 1 Remove the top cover right front side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan 3 Remove the fan 4 Remove the electrical control box cover Electrical parts 5 Disconnect the fan motor connector CN11 5p white from the PCB board 6 Remove the fan motor after unfast
59. ng the big handle and the right rear panel 9 Remove the PCB board How to remove the compressor 1 Perform work of item 1 2 3 2 Remove the electrical control box and partition plate Extract refrigerant gas Remove the sound insulation material and crankcase heating cable Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal Remove the discharge pipe and suction pipe with a burner Remove the hex nuts and washers fixing the compressor to bottom plate Lift the compressor 5 Reactor The valve 4 way How to remove the reactor 1 Perform work of item 1 2 Unfasten the connector between IPM and reactor Remove two screws of cover of inductance and remove the cover of inductance Disconnect two pieces of wires connected from the cover of inductance Remove two screws of reactor and remove the reactor How to remove the 4 way valve 1 Perform work of item 1 2 2 Extract refrigerant gas Remove the electrical parts from item 3 Remove fixing screw of the coil and remove the coil Detach the welded parts of 4 way valve and pipe Screws of inductance Coil Welded parts The How to remove the expansion expansion valve 1 valve Perform work of item 1 2 Remove the electrical parts from ite
60. nsor faulty Outdoor PCB faulty Trouble shooting Temperature protection of compressor discharge Check whether the compressor discharge temp is more than 115 C Check whether the refrigerant is leak Yes Stop leaking add refrigerant No whether the wiring connection is right between compressor discharge temp sensor and PCB according to wiring diagrams No gt Correct the wiring connection gt ee Yes Y Judge The discharge temp sensor is broken Method Check whether the resistance of compressor discharge temp sensor is right refer to the Appendix 2 No Replace the compressor discharge temp sensor Replace outdoor main board gt Trouble is solved 4 9 4 2 13 P5 High temperature protection of condenser error diagnosis and solution When outdoor pipe temperature is more than 65 the unit will stop and unit runs again when outdoor pipe temperature is less than 52 The condenser temperature sensor faulty Heat exchanger dirty System block Trouble shooting High temperature protection of condenser Replace the temperature sensor Check whether the condenser temperature is more than 65 C heck whether the resistance of condenser temp sensor is correc
61. olution Trouble shooting Check if the connections and power supply is normal No When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal Connection mistake faulty y Indoor main PCB is defective Replace indoor main PCB Correct the connections Turn on the unit when the power supply is good 9 4 1 4 Indoor fan speed has been out of control diagnosis and solution Soon on When indoor fan speed stays too low 300RPM for certain time the unit will stop and the LED will display the failure Trouble shooting Wiring mistake Fan assembly faulty Fan motor faulty faulty Shut off the power supply and turn it on 1 minute later Is it still displaying the error code No v The unit operates normally ve Find out the cause and have it solved For example check whether the fan is blocked or the bearing is broken shut off power supply rotate the fan by hand Does it rotate properly No Yes Check Ros wires of fan motor Are all the No Correct the connections ee good ve If the Check x the fan malfunction is Replace the fan ue motor is normal through Still existing motor index 1 replace the 1
62. onnection wires and connectors on the PFC C and CN12 yellow yellow connected to PFC inductance R and CN12 blue red connected to rectifier and red blue connected to P1 and P3 on PCB CN7 4p red connected to CN11 on PCB CN8 2p white connected to CN202 on IPM the board Remove after remove the two SCrews Disconnect four wires red blue from PFC and black red from PCB then the rectifier can be removed Disconnect following connection wires and connectors between PCB and other components P4 blue connected to N on IPM HI Er t P2 red connected to P on IPM P1 red connected to on PFC P3 blue connected to on PFC RY4 red connected to rectifier CN34 2p white connected to CN3 on IPM CN6 CN22 blue blue connected to 4 way valve CN3 CN40 red red connected to crankcase heating cable CN11 4 red connected to on PFC CN13 T2B A B C D temp sensor 2p 2p 2p 2p white CN9 CN8 CN33 CN33 Tdischarge temp sensor 2p white CN8 T3 T4 T3 T4 temp sensor 2p 2p white CN9 High and low pressure switch 2p 2p white CN18 CN19 CN20 CN21 electronic expansive valve A B C D 6p 6p 6p 6p red red red red CN27 CN28 CN29 CN30 S A B C D 3p 3p 3p 3p white white white white CN1 CN2 red black connected to power terminal P 1 P 2 yellow green yellow green
63. or 50 minutes please check if there is any leakage points After vacuuming fully close the low side valve of the charging manifold set and than turn off the vacuum pump Confirm that the pressure gauge needle does not move within approximately 15 minutes after turning off the vacuum pump Turn on the core of the 3 way valve using a properly sized Allen Wrench about 45 counterclockwise for 6 or seconds and observe the sound of the refrigerant coming out Than re tighten the valve core Make sure the pressure indicated on the low side pressure gauge is a little higher than the atmospheric pressure Then remove the charging hose from the service port of the 3 way valve 8 Fully open the valve cores of both 2 way valve and 3 way valves and then securely tighten the brass valve cover caps 2 Air purging by refrigerant Procedure 1 Confirm that both the 2 way and 3 way service valves are set to the closed position 2 Connect the charging set and a charging cylinder to the service port of the 3 way valve 3 Air purging Open the valves on the charging cylinder and the charging manifold set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat this for 3 additional times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check for any gas leakage Check all flare connections for gas leakage
64. or UNICENOrDISPla V 55565 a 32 L Odor UnC DISDA rs 34 94 Diaghesisand SolutlOll usua ie cs teed sence turae ede ue Fuck ine m eed dU dE PE Eq 38 9 9 Trouble Criterion OF Main a 82 DISASSEMDIY IINSUUICTIOINS mec ada a 93 Model YNO18GMFI16M2D Dual Split 93 Model YN027GMFI16M3D Triple Split 100 Model YN030GMF116M3D Triple Split nnnm nennen nnne nnn nnn 107 Model YNO36GMFI16M4D Quad Split nennen nnne rn 115 EXDloded VIEW LLL LE I IM EI 122 Product Specifications YN018GMFI16M2D YN027GMFI16M3D YNO30GMFI16M3D YNO36GMFI16M4D 230V 60Hz 1Ph 230V 60Hz Ph Co o CANNE RN DA130S1C 20FZ TNB306FPGMC L 1150 2120 3010 olo Power supply Ph V Hz MINIMUM CIRCUIT AMPACITY MAX FUSE Starting current Model Type Brand Capacity Btu h Input Compressor Rated current RLA Locked rotor Amp LRA Thermal protector C ESTER OIL Thermal protector position Capacitor Refrigerant oil oil charge Model Brand 3 Input 2 e 2 Outdoor fan motor LRA Winding Resistance Capacitor r min Outdo
65. or air flow m3 h 3 o CD Outdoor noise level Dimension W D H 845x320x700 845x320x700 900x315x860 990x345x965 Dimension W D H inch 33 27x12 6x27 56 33 27x12 6x27 56 35 43x12 40x33 86 38 98x13 58x37 99 3 Packing W D H p 540 300 540 300 540 340 Liquid side Gas side mm inch 2 X 6 35 9 52 1 4 3 8 3 x 6 35 9 52 1 4 3 8 3 X 6 35 9 52 1 4 3 8 4 x 6 35 9 52 1 4 3 8 Outdoor unit Packing W D H inch Net Gross weight Net Gross weight Pound Refrigerant type PSIG x UJ c c Design pressure N CD length for all m Max length for all rooms 197 eo oOoloielo vo o eol o CD Max length for one indoor unit Max length for one indoor unit Refrigerant piping OU higher than IU gt OU higher than IU CD CD CD Max height difference between indoor and outdoor unit OU lowerthan IU OU lower than IU gt A A Q es s Ra O O A x Max height difference between indoor units CD Max height difference between indoor units Remote control Remote control Thermostat type cooling Operation cooling temperature heating heating
66. or diagnosis and solution Only for YN027GMF116M3D d If the sampling voltage is not 5V the LED will display the failure Wiring mistake Over load protector faulty System block Outdoor PCB faulty Trouble shooting Temperature protection of compressor top Whether compressor operates Whether the connection is No Reconnect and retest good T Yes Whether refrigerant circulation volume is normal Whether protector is normal If protector is normal resistance 0 No Replace the protector No Charge refrigerant Yes Y Replace the outdoor main PCB Whether abnormality is the same after gas charging Check refrigerant system such as clogging of capillary etc gt lt e o 2 UKE Dad m 9 4 2 9 P1 High pressure protection error diagnosis and solution Only for YNO36GMFI16M4D If the sampling voltage is not 5V the LED will display the failure Wiring mistake Over load protector faulty System block Outdoor PCB faulty Trouble shooting High pressure protection Judge 1 Whether the wiring between the high pressure switch and main control No Connect it well board is connected well or correctly Yes Y Judge 2 Whether the high pressure pr
67. or unit evaporator outlet temp T2sB If the temp is lower than 9 degrees the digital display digits will show 9 If C indoor unit evaporator outlet temp T28C the temp is higher than 70 degrees the digital display digits will show 70 If the indoor unit is not connected the digital display digits will show 0 1 3 5 17 18 19 20 D indoor unit evaporator outlet temp T23D 21 E indoor unit evaporator outlet temp T28E 22 A indoor unit room temp T4A If the temp is lower than 0 degree the digital display digits will show O If the temp is higher than 50 degrees the digital display digits will show 50 If the 23 B indoor unit room temp T1B indoor unit is not connected the digital display digits will show 24 C indoor unit room temp T4C If the temp is lower than 9 degrees the digital display digits will show 9 1f 2 2 2 2 2 B D indoor unit evaporator temp T2D the temp is higher than 70 degrees the digital display digits will show 70 If E indoor unit evaporator temp T E the indoor unit is not connected the digital display digits will show Condenser pipe temp T3 Outdoor ambient temp T4 5 6 7 8 9 30 31 32 33 34 Compressor discharge temp Tp The display value is between 30 129 degrees If the temp is lower than 30 degrees the digital display digits will show 30 If the temp is higher than 99 degrees the di
68. otector is broken v Method Short connect the high pressure protector socket check whether the system can Yes Replace high pressure protector run normally or test the resistance No Y Check whether the refrigerant system is ok Judge 3 Check whether outdoor ambient temperature is higher than 43 C No v Yes Stop the unit Judge 4 Check whether the outdoor unit is bad Yes Make the outdoor unit ventilate well ventilation No Y Judge 5 Check whether the heat exchanger is dirty Let the refrigerant out then use the Judge 6 Check whether the high pressure nitrogen or refrigerant to Yes refrigerant pipe is blocked blow pipe vacuumize and charge the refrigerant again Replace outdoor main board Clean the heat exchanger 9 4 2 10 P2 Low pressure protection error diagnosis and solution Only for YNO36GMFI16M4D If the sampling voltage is not 5V the LED will display the failure Wiring mistake Over load protector faulty System block Outdoor PCB faulty Trouble shooting Low pressure protection Judge 1 Whether the wiring between the low pressure protector and main control board is connected well or correctly Yes Y Judge 2 Whether the low pressure protector is broken v Method Short connec
69. own the power supply electrical power remain charged in those capacitors Do not forget to discharge the electrical power remaining in the capacitors before servicing The value of resistance used for discharging the power should be about 1500 ohms to 2000 ohms Electrolytic Capacitors HIGH VOLTAGE CAUTION Bulb 25 40W The voltage in P3 and P4 in outdoor PCB is high voltage about 310V The voltage in P5 and P6 in outdoor PCB is high voltage about 310V 8 2 Indoor Unit Error Display WB series Wall Mount Indoor Units Display EO E1 E2 E3 E5 E6 PO P1 P2 P3 P4 P5 Failure Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Zero crossing signal error Indoor fan speed has been out of control Open circuit or short circuit of outdoor temperature sensor or outdoor EEPROM malfunction Open circuit or short circuit of T1 or T2 temperature sensor IPM module protection or IGBT over strong current protection Voltage protection Temperature protection of compressor top Outdoor temperature is lower than 15 C optional function Inverter compressor drive protection Mode conflict FB Series Floor Console Indoor Units Operation X Timer De frost ODU Error code 4 6 E5 PO Failure X X Open or short circuit of T1 temperature sensor X Open or short circuit of T2 temperature sensor Commun
70. r level every 2 minutes till reaching F1 COOL F9 ICOOLLMT5 COOL_F8 ICOOLLMT4 lf gt 115 C for 10 seconds the compressor will stop and restart when lt 90 COOL F6 ICOOLLMT2 7 3 3 Fan Speed is out of control DC fan motor COOL F5 ICOOLLMT1 If the current frequency is lower than COOL F4 the frequency will When outdoor fan motor speed is lower than netbelinited ae 5 or higher than 2400RPM for 60 After 10s of the compressor start if the current gt ICOOL the AC will seconds the whole unit stops and LED displays 2 for 30 seconds stop will restart 3 failure Heating mode Current Current limit Frequency limit frequency Hz value A IHEATLMT12 Decrease the frequency to HEAT F4 and run at HEAT F4 for IHEATLMT11 3 minutes HEAT F16 HEAT F15 10 After that the frequency will be adjusted according to capacity demand and rise to the upper level every 3 minutes When the frequency Heat F4 via HEAT F12 IHEATLMT8 capacity demand HEAT F11 IHEATLMT7 HEAT F14 HEAT F13 IHEATLMT9 HEAT F10 IHEATLMT6 HEAT_F9 IHEATLMTS5 HEAT F8 IHEATLMT4 HEAT F7 IHEATLMT3 HEAT F6 IHEATLMT2 HEAT F5 IHEATLMT 1 If the current frequency is lower than HEAT F4 the frequency will not be limited After 10s of the compressor start if the current IHEAT the AC will display the failure for 30 seconds and stop The AC will r
71. r unit i Outdoor 4 Heating mode Cooling T1 Ts When there are more than one indoor units 3 NI 3 2 E 2 Outdoor temperature T4 1 0 NC Cooling 0 0 17C 25 C Note final result is integer She a In low ambient cooling mode modify rate is fixed Plus all the indoor capacity requests together When T2 T2 ExitT4LowFre ADD 2 and 4 gt 6 then modify it by T4 the highest frequency can t exceed F17 When there is only one indoor unit When T2 T2 ExitT4LowFre ADD 4 and 4 gt 8 the highest frequency can t exceed F18 E the highest frequency can t exceed F19 Modify rate 120 80 20 For all other conditions the highest frequency is CIE NEC RE me 7 4 2 Defrost control When there are more than one indoor units Condition of defrosting Outdoor temperature T4 Heating T3 TempEnterDefrost ADD and lasts for 40 E 12 C 17 minutes Modify rate rate 120 100 Defrosting action Note The final result is integer 4 way valve defrosting Defrosting over Then modify it according to T2 average correction compressor Max 10 minutes Note Average value of T2 Sum T2 value of all indoor units indoor units number frequency Cool F9 frequency Compressor stops 10S 305 Indoor fan PO Anti cold control T2 54 52 20 46 42 40 Outdoor fan EXV open 4
72. reheating release condition If T4 5 C or the capacity demand isn t zero preheating function will stop 7 3 12 Compressor crankcase heater Preheating permitting condition o When T4 3 C within 5 seconds of being plugged in the crankcase heater will be active When T4 lt 3 C and the compressor is not running for 3 hours the crankcase heater will be active Preheating release condition When T425C or the indoor has any capacity demand the crankcase heater will stop working 7 4 Control and Functions According to the final capacity request to confirm the operating frequency as per the following table Total capacity Request 2 Norm code x HP 10x COO modify rate correction COO COO COOL y Frequency Hz L F2 F15 RE Cooling mode Amendatory capacity 1 2 15 16 demand 7 4 1 Capacity Request Calculation Ti Ts 1 a 4 52 7 3 Meanwhile the maximum running frequency will 2 i 2 be adjusted according to the outdoor ambient 1 a 1 temp e 0 1 f 14 _ T4LimFre5 ADD Capacity area a b c d e f M gt 48 a 2 02400 45 K T4LimFre3 ADD 22 42 41 T4LimFre2 ADD Note The final result is an integer 48 Plus all the indoor capacity requests together T4LimFrel ADD then modify it by T4 b 37 No limit When there is only one indoo
73. t refer to the Appendix 1 Yes Replace outdoor main board Judge 1 Check whether the outdoor ambient temperature is higher than 50 C Yes Stop the unit Judge 2 Check whether the heat exchanger is dirty Yes Clean the heat exchanger No y Let the refrigerant out then use the high pressure nitrogen or refrigerant to blow pipe vacuumize and charge the refrigerant again Judge 3 The refrigerant pipe is blocked 9 4 2 14 P6 IPM module protection error diagnosis and solution Trouble shooting turn off Wiring mistake IPM malfunction Outdoor fan ass y faulty Compressor malfunction Outdoor PCB faulty IPM module protection Check whether the voltage range of P N on IPM module is normal DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h Check whether the input power supply is correct 208 230V 1N 60Hz Regulate it to correct the check whether the system can work normally No heck whether the connecting line between main board and the IPM module is connected tightly Connect it tightly check ok or not Check whether the power supply line is connected correctly and tightly Connect it correctly and tightly check ok or not Yes No
74. t side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan 3 Remove the fan 4 Remove the electrical control box cover 5 Disconnect the fan motor connector CN37 5p white from the PCB board 6 Remove the fan motor after unfastening four fixing SCrews How to remove the electrical Electrical parts parts 1 Perform work of item 1 2 2 Remove the ten screws fixing the IPM board 3 Unfasten the connector of the reactor PCB board IPM board 4 Unfasten the connector of the compressor Disconnect following 5 5 pieces of connection wires IPM and connectors between PCB CN38 2p white CN21 5p white CN39 2p blue L OUT red N OUT blue Lo lt i 6 Remove the IPM board T Disconnect the connectors and wires connected from PCB and other parts CN18 CN19 CN25 CN23 Connectors CN17 T3 T4 temp sensor 2p 2p white CN7 Tdischarge temp sensor 2522 2p white cci 957 CN15 T2B A B temp sensor 2p 2p white CN18 CN19 Electronic expansive valve A B 6p 6p red red CN25 CN23 S A S B 3p 3p white white Wires CN1 CN2 4 way valve blue blue CN5 CNG Crankcase heating cable 4 Compressor red red CN3 L IN red CN4 N IN black 8 Disconnect the grounding wire yellow green after removi
75. t the low pressure protector socket check whether the system can run normally or test the resistance No Y Check whether the refrigerant system is ok Judge 3 Check whether the outdoor ambient temperature is too low No Connect it well Yes Replace low pressure protector Yes Stop the unit No Y Judge 4 The refrigerant of the system is leakage Leak hunting Charge nitrogen or refrigerant Method Connect the pressure gauge to the gauge joint of the system check whether the pressure is lower than 0 14MPa v Judge 5 The refrigerant pipe is blocked v Replace outdoor main board Yes to the system if the leakage is serious there will be distinct gas leakage cici sound if the leakage is slight use the suds mixture of water and abluent is also ok if it can make bubble or electronic leak detector Y es Let the refrigerant out then use the high pressure nitrogen or refrigerant to blow pipe vacuumize and charge the refrigerant again 9 4 2 11 P3 Current protection of compressor error diagnosis and solution If the compressor current exceeds the current limit value for 10 seconds the LED will display the failure Wiring mistake Over load protector faulty System block Outdoor PCB faulty Trouble
76. terial and crankcase heating cable Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal Remove the discharge pipe and suction pipe with a burner Remove the hex nuts and 8 Washers fixing the compressor to bottom plate Lift the compressor 5 Reactor How to remove the reactor 1 Perform work of item 1 2 Unfasten the connector between IPM and reactor Remove two screws of cover of inductance and remove the cover of inductance Disconnect two pieces of wires connected from the cover of inductance Remove two screws of reactor and remove the reactor The 4 way How to remove the 4 way valve valve 1 2 Perform work of item 1 2 Extract refrigerant gas Remove the electrical parts from item 3 Remove fixing screw of the coil and remove the coil Detach the welded parts of 4 way valve and pipe Screws of over of inductance The How to remove the expansion expansion valve 1 valve Perform work of item 1 2 Remove the electrical parts Expansion from item 3 valves Remove the coils Detach the welded parts of expansion valves and pipes gt Model YNO30GMFI16M3D No Partname Procedures 7 Remarks How to remove the panel plate Screws of top cover 1 Panel plate 1 Stop operation of the air conditioner and turn OFF the power breaker 2 Remove the screws of top TE cover
77. value Vs is the voltage between 5 and L2 Refer 15 all the wiring between Na terminal and Indoor PCB connect ok Turn on all indoor unit by remote controller Is all indoor unit cisplay Yes Y Change the Indoar PCB Yes ec lt urn off the all indoor units Is IP power LED or operating LED lamp On Refer PIC2 No change I2M Power on by remote controller Ils it still displaying the error code after 3 minutes Is the reactor connecting well Is main board AE lamp on Refer PIC 3 Reconnect the wiring Y Yes es v Change Outdoor Main PCB sindoor units number correct Che on the outdoor check point 2 for dual zone 3 for tri zone 4 for qua zona Refer PIC 4 Trouble is solved No Na second time 9 A Change outdoor unit PCB assembly include wiring totally Pic 1 Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit The red pin of multimeter connects with L2 port while the black pin is for S port When AC is normal running the voltage will move alternately between positive value and negative value Pic 2 IPM For dual tri zone an d E Pic 2 IPM For quad zone CE KFR105H 8P2T3NI Self Check hd te gt d
78. whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h No Y Replace bridge rectifiers and then check whether the system can run normally Only for qua zone 2 7 it Replace IPM board and then check whether the system can run normally No Y Y Replace outdoor main board 7 rouble is solved IPM for dual tri zone IPM for quad zone P N for dual tri zone O cC D C 2 oO 5 4 A bridge rectifier for dual tri zone bridge rectifier for quad zone Remark Measure the DC voltage between and port The normal value should be 190V 250V 9 4 2 6 E6 PFC module protection error diagnosis and solution Only for YNO36GMFI16M4D When the voltage signal that PFC sends to main control board is abnormal the display LED will show 6 and AC will turn off Wiring mistake Outdoor PCB faulty Inductance of PFC module faulty PFC module malfunction Trouble shooting PFC module protection Check whether the connecting line between main board and the PFC module is connected tightly Connect it tightly check normal or not Yes 4 No Y Check whether the voltage range of P N on IPM module is normal DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h

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