FREE COMBI SERIES
Contents
1. LLL EBUL LLL LLILLLELLLLL LIL LLL Q d Unit mm gt 60cm J ULI Y cM M art AX 5 N 4 lt SD BT DSi 2 Q TAA Wrench Model FC E28AI 950 420 TESS CO DI SS AL CDA Os Dese yer FOR 1000000000000 93118989 LL LLI sup Unit mm E er am ae e ei Wd ggg Ss La SS Wrench Model Model These circuit diagrams FC E24AlI FU 14BN FU 15BU 28BN PA L BN 19YEGN 5 T AC N3 AC L3 WH T 11 AC N1 X14 PRA AC LI X10 AC L AC N1 7BU 3BN OVERLOAD AP1 29WH 30WH ELECTRICAL BOX Al FAN H FAN L X7 X11 HEAT C X4 gt gt ZPD X2 gt gt O EXHAUST X28 TUBE ROOM HEAT B X30 OVC AC N X20 X29 Gre ea FAN MOTOR BN BROWN BU BLUE BK BLACK GY GRAY2. 10 Power Module DYS2A 920 ITT 11 PFC Module JGPO11A 30111018 1 12 TeminalBoardRS9413G O 420107 8 3 13 ITeminalBoargRS9418 O 42011041 4 14 Power Module DYS2PFC _ 92008 1 15 1ReactorLO275uH 275uH40A 4312002 1 16 Module Bracket 24213007 3 17 FiterFN2030 80 08 491800280 1 18 ElecmicPlate 0 1 6 1 19 Electric Plate cover 01413108 T T 20 MainPCB ao 1 4WayValv Colli 43000400 1 L 22 Wayae 3 28 CapacorCBB611ASUF450V 33010027 1 24 lcompressor 09 1 25 Top Coverassy zsssesn 1 26 Metal Base Assy 01209 1 27 Valve Suppt _ rsoss__ 28 Power cable 400205 1 29 VaveAssy38 07130209 O 4 30 VaveAssy1 0130068 4 31 Electronic Expansion Vave 07180858 4 122 Electronic ExpansionLoop 4300008 4 93 HearSidePlae 013083007 1 34 Frontside Plate 02008 1 35 isolation Sheet 9139 1 56 frontal 01473000 37 Handle 262352538 2 38 j LetHande zz d Ni gt gt
3. Front Side Plate 2 Disassemble Rear Grill Rear Grill Unscrew the 4 screws fixing the rear grill to re Move it 3 Disassemble Cabinet Unscrew the screws fixing the cabinet to remove Screws it Cabinet 12 4 Disassemble Right Side Plate Unscrew the screws at the right side plate the valve support and the side plate of the condenser to remove the right Side Plate Right Side Plate 5 Disassemble the electric box Unscrew the 4 screws fixing the electric box cover to remove the electric box cover And then unscrew the 4 screws fixing the electric box Pull each lead wire from the electric box remove the electric box Electric box cover Screws 13 6 Disassemble the axial flow fan Unscrew the nut fixing the fan with a spanner to take out the fan Nut Axial Flow Fan 7 Disassemble Motor Unscrew the screws fixing the motor support and then lift it upwards to remove it Unscrew the screws fixing the motor to remove it 8 Disassemble Four way Valve Wrap the four way valve with wet cotton and unsolder the 4 weld connecting the four way valve to take it out Note Refrigerant should be discharged firstly Welding process should be as quick as possible and keep wrapping cotton wet all the time Be sure not to burn out the lead out wire of Four way valve coil compressor 14 9 Disassemble valve support sub assy bidirectional liquid liquid storage tank
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5. AP1 Main Board AP2 PFC Module AP3 Drive Board AP4 Power Module FC E28AI FU e_N 4BN lt gt 158 28BN 6BU 2BN LINNA HOOGNI 0 3OOQNI 8 HOOONI V LINN YOOGNI ELECTRICAL BOX Al FAN H FAN L X7 X11 sB B FILTER CI ropas pea FAN MOTOR BN BROWN BU BLUE BK BLACK GY GRAY 1 Main Board AP3 Drive Board PFC Module AP4 Power Module V Y pe ul m 24YE RT3 L OUTTUBE OUTROOM EXHAUST BASE S2 TEM SENSOR TEM SENSOR TEM SENSOR HEATER WARNING WHEN THE UNIT IS RUNNING OR STOPED IN 2 MINUTES OR THE VOLTAGE LESS THAN SOV BETWEEN P AND N OF IPM PLEASE DON T TOUCH ANY TERMINAL AVOIDING ELECTRICAL SHOCK HAZARD WH WHITE YE YELLOW RD RED YEGN YELLOW GREEN 19YEGN E X14 AC Li AC N1 AC N3 AC L3 AP8 X10 AC L pe vv AC NHI XH 3 268K 4 Ez OVERLOAD AP1 HEAT C X4 X28 ROOM EXHAUST TUBE HEAT B X15 X30 AC N X20 X29 W41 24YE A BASE S2 HEATER OUTTUBE EXHAUST TEM SENSOR TEM SENSOR SENSOR WARNING WHEN THE UNIT IS RUNNING OR STOPED IN 2 MINUTES OR THE VOLTAGE LESS THAN 50V BETWEEN P AND N OF IPM PLEASE DON T TOUCH ANY TERMINAL AVOIDING ELECTRICAL SHOCK HAZARD WH WHITE YE YELLOW RD RED YE
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8. SERVICE MANUAL 1 bafi E II M ghi FREE COMBI SERIES m FC E24Al FC E28Al D SINCLAIR AIR CONDITIONING 1 echnical specifications M Ws GEHE gg an 1760 CE EI 9 aa 9 hh 9 fr Fw vue Oi Isolation na i i Pressure for the Discharge SIde MPa Pressure for the Suction Side MPa Sound Pressure Level dB A H M L 86054 80564 Sound Power Level dB H ML E Note The above data is subject to change without notice Please refer to the nameplate of the unit Drainage hose 9 lt lt 9 CO p O SS om N ONG SSN KD NN ASS IU E SMS E Connection pipe 9JIM 9 0 CSS SD VENE x SG SI RO gt lt ERR RUM TTA IM TTA 77 11717 IM TITAN IM Mi B z ls z P 7 1 1 pr Pr P P r 3 0U 4 tl FC E24Al Model 420 950
9. valve support sub assy should include gas liquid valves valve support air collective pipe Valve support electric magnetic expansion valve diffluence pipe Air collective pipe Unscrew the bolts which fixed the valve support unsolder the soldered points on bidirectional liquid storage tank take off the valve support sub assy the air collective pipe is connected with 4 way valve Electric magnetic expansion valve Diffluence pipe Bidirectional liquid storage tank Soldered points 10 Disassemble Compressor Open the soundproofing cotton Unsolder the pipe line connecting the compressor and then unscrew the 3 foot nuts fixing conpressor to remove it Gas Liquid Separator Weld E lt AI m Soundproofing Cotton Silencer Compressor 15 2 FC E28AI Operating Procedures Photos 1 Disassemble Top Cover Front Side Plate Unscrew the screws fixing the top cover and then TOP Gover lift the top cover to remove it Unscrew the screws fixing the front side plate to remove it 2 Disassemble Rear Grill Unscrew the 4 screws fixing the rear grill to re move it 3 Disassemble Cabinet Unscrew the screws fixing the cabinet to remove Screws it Cabinet 16 4 Disassemble Right Side Plate Unscrew the screws at the right side plate the valve support and the side plate of the condenser to remove the right Side Plate Right Side Pla
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11. If there is 310V between PN but Abnormal when compressor start up the gt connected with voltage is still 310V power module is firmed or not Normal If voltage between PN is normal then to check 5 core has problem whether the input AC is abnormally fluctuated replace 5 core wire if there is no problem if the voltage fluctuation between procedure replace PFC module is large or protective unit off momently when power off that is normal protection and unit off VVhen compressor start up the voltage of the compressor can not arrive 380V then replace the power module Temperature sensor F1 F2 F3 F4 F5 or cooling indicator extinguish 3s blink once extinguish 3s blink twice extinguish 3s and blink three times extinguish 3s and blink four times extinguish 3s and blink five times Q Processing method Pls check whether the resistance value of corresponding sensor is normal or not Reliabily inserted or not Lead wire damaged or not Otherwise the sensor electric circuit or controller have malfunction Some of indoor unit haven t display the troubleshooting or processing of malfunction Start up failure Malfunction and phenomenon After unit is turned on indoor and outdoor units normally run but there is no cooling or heating observe module of outdoor unit and discover the malfunction indicator firstly blinks 7 times after
12. module whether loosen or not Measure the insulating resistance for grounding to confirm whether there is electrical leakage or short circuit in the unit _ When the breaker is set ON it will trip at once Breaker trippe EE mE sulation malfunction of line or componen SIUS DUST QUT in the air conditioner Insulation occurs after radiation which causes short When the unit is turned on the circuit or electricity leakage Measure breaker will trip in a few minutes insulating resistance or use one by on elimination method Malfunction of fuse Replace it No power supply Check power supply circuit Air conditioner does not response after powered on The buzzer does not sound after the plug is connected and the unit does not response after the remote controller is used to turn it on Check and plug well plug make loosen contact firm The power plug is not or poorly connected Y Controller fuse is burnt out Change control fuse Secure the wire connection measure the output voltage of the transformer and replace it if the value is wrong Loose or poor contact of transformer connection or transformer malfunction Y Air conditioner cannot start up The controlle
13. start up for many times later the malfunction indicator blinks 6 times Processing method 24 A Examine whether the compressor wiring is firmed or not B Check whether the compressor has malfunction or not refer to the prior testing method of module protection C Replace a new drive board if it normally starts up that is the power module electric circuit malfuntion Communication malfunction of outdoor unit main board and power module Malfunction phenomenon outdoor unit main board D104 indicator blinks 4 times or power module malfunction indicator Green ever light on Processing method A Check whether is there any problem between outdoor main board and 5 core wire of power module B Replace one new power module and outdoor mainboard communication malfunction resumes that is the power module problem Otherwise it is the outdoor mainboard problem replace error controller DC current power short circuit Malfunction phenomenon Outdoor unit main board malfunction indicator D101 blinks 15 times Malfunction reason module IPM module short circuit in PN or the electric inductance short circuit cause the unsuccessful of capacity charge when starting Processing method Check whether the ciruit is normal or not on the outdoor unit mainboard mostly the concrete resistance and main relay examine the PFC module IPM module or the short circuit caused by PFC electric inductance pls refer to the che
14. too high and excessive compressor will stop for 3mins if Tair exhaust resume to normal that the compressor outdoor fan will resume to run If the Tair exhaust temperature protection has continuously happened for 6 times that the compressor cannot resume it needs to power on then can resume If compressor running time exceed 7mins the protection times will clear to O 2 4 4 Communication malfunction Indoor unit installation quantities test after powered on within 3mins outdoor unit hasn t received the communication data from some indoor unit that outdoor unit wiill judge this indoor unit haven t installed Outdoor unit will not communicate with indoor unit Communication malfunction when continuously 3mins hasn t received the correct signal of all the installed indoor unit or within 10s cannot receive the correct signal from the drive board that are communication malfunction the outdoor unit will stop running Communication malfunction happened during defrosting will process as following multi unit heating defrosting break off start part of indoor unit communication wire go on defrosting until defrosting finished then make response to indoor unit communication malfunction 2 4 5 Module protection Compressor will stop when module protect when indoor temperature arrive at presetting temperature the unit will stop running compressor has stopped 3mins it will automatically resume to running status If in defrosting procedure af
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16. 1 22 wsyvae lt 49 1 28 CapaciorCBB611ASUF450V 33010027 1 24 compresso 0005zqg 1 25 TopCoveassy bb 012552621 1 26 MetalBaseAssy 00 1 27 Valve Suppt 01718044 1 28 Power cable 4000 T T 29 VaveAssy38 O 07309 3 30 Vave Assy 0 3 31 Electronic Expansion Vave 1 0 08 1 2 32 Electronic Expansion Loop 43000009 3 33 HearSidePlae 01308007 T 34 Frontside Plate 02008 1 35 isolation Sheet 0123308 36 Fontc 01478000 1 37 Handle 26235258 1 2 38 zz i Col COT COT Coy AAA a a a Note The above are subject to be changed without notice 2 FC E28AI C Parts List i _ 3 0335253 1 _ 4 MotorFW amp 0K 15013802 1 6 MotorSuppgt 01705007 Rere 01475252 3 9 Radiator 49 O 1
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18. GN YELLOW GREEN are subject to change without notice please refer to the one supplied with the unit 5 Operation 1 Temperature parameters Indoor ambient temperature Tinner ambient Indoor setting temperature Tset 2 System first power on After electrified the side valve will be powered on each electron expansion valve will be turned off orderly then side valve will be powered off all the electron expansion valve should be turned to a certain angle the unit on is standby Under each modes once the compressor starts up at least running for 7mins the unit will stop not including malfunction protection modes switch the compressor needed to stop running Once compressor stopped the unit will start up after 3mins delay Heating oil return or defrosting except 2 1 Cooling mode 2 1 1 Working condition and procedure of cooling running If compressor stopped and turn on the unit for cooling if any one indoor unit Tindoor amb 2T preset 0 5 C that the cooling will run at this time the outdoor fan motor compressor starts to run the compressor frequency will run at the capacity requirement calculated 2 1 2 Unit will stop for cooling 1 Compressor will stop running Compressor will stop running right away outdoor fan motor will delay 1min and will stop running all the electron expansion valve starts to work when turns off all valves at OP the side valve will be electrified the valve fully turns t
19. ature to adjust the fan speed When compressor stops running outdoor fan will run at When cooling oil return after compressor frequency rise up to 70HZ it will stayabily run Outdoor fan motor will accord to indoor unit will run at current fan speed and after 1min delay to stop 2 1 6 Cooling oil return condition rating capacity total capacity and temperature automatically adjust the fan speed The oil return lasting time of cooling will be 5min including frequency rising time oil return will be completed 2 1 7Anti freezing protection When it is satisfied with anti freezing protection the system will enter into anti freezing protection at this time only some of the indoor unit anti freezing protection indoor capacity will be set as 0 when all running indoor unit act the anti freezing protection the unit will process as Cool mode When it is satisfied with the anti freezing protection finished the anti freezing protection will be finished 2 2Dehumidify mode Working condition and procedure of dehumidifying the same with Cool mode Protection function the same with Cool mode Close up 4 way valve The single unit capacity requirement percent of dehumidifying mode max value is the cooling mode 90 outdoor fan motor compressor start up condition is the same with that in Cool mode 2 3 Heating mode 2 3 1Working condition and procedure of heating running When any one of indoor unit Tindoor amb lt Tpreset 2 5 will sta
20. cking method of prior module protection and PFC protection replace the corresponding controller or PFC electric inductance 25 1 Indoor unit red indicator blinks 6 times communication malfunction analysis Indoor unit running indicator blinks 6 times or nixie tube display E6 communication malfunction According to wiring diagram to check indoor and outdoor unit side line is OK No According to wiring diagram for wiring 15 communication normal Yes Are there indoor units in unit on status has communication malfunction Yes No Yes 0101 on outdoor unit control board AP1 blinks 4 times Yes Replace malfunction indoor unit control board No Yes 15 communication normal The indicator on outdoor No unit control board AP1 can not light on Replace outdoor unit control board AP1 according to wiring diagram for wiring Yes Replace outdoor unit control board AP1 and radiator sub assy Including AP2 AP3 and radiator slice according to wiring diagram for wiring No Electric box B block FU fuse burnt out Yes 15 communication normal No No Replace 3 15A fuse The 3 15A fuse on control board AP1 was burnt out Yes Replace outdoor unit control gt 15 communicat
21. ctional liquid storage tank take off the valve support sub assy the air collective pipe is connected with 4 way valve Electric magnetic expansion valve Diffluence pipe Bidirectional liquid storage tank Soldered points 10 Disassemble Compressor Open the soundproofing cotton Unsolder the pipe line connecting the compressor and then unscrew the 3 foot nuts fixing conpressor to remove it Gas Liquid Separator Weld E lt AI m Soundproofing Cotton Silencer Compressor 19 1 General use part Notice 1 Preparations before Repair Step 1 Firstly determine the model of unit to be repaired and find out the model and material code of the main damageable components particularly the outdoor controller Step 2 According to the fault described by the user make a preliminary judgment on the possible components that might be repl Bring them with you for repair Step 3 To repair the VF unit you need to bring with you the multimeter and clamp on ammeter except the usual tools as screwdriver and spanner nio electric shock during repair do not touch any terminal before it is that the voltage between module N is less than i 3 Before or after the maintenance should examine the the user power socket wiring board of indoor or outdoor unit there are all insert pieces on the mainboard especially the outdoor unit mainboard power module and PFC
22. eplace PFC module Normal Under the condition of whole unit is powered off pull out the wire on AC L1 AC N1 then test the resistance between AC L1 and AC N1 if the value of resistance is 0 the PfC module damaged Normal Check PFC electric inductance white wire to yellow wire and green wire brown wire to yellow wire and green wire Replace PFC electric if there any restance value is O PFC electric inductance inductance short circuit Normal Check whether the coolant is coated evenly is Abnormal Suc iiec the n there any obstruction in installation position module fan install O whether the screws on power module is tightened the power module 3 Normal gt 8 orma Check whether the outdoor unit heat exchanger radiating Abnormal Remove the obstruction 5 effect is good or not clean and wash Norma After wired then power on If there is no AC input to turn on the unit check Abnormal then check the circuit whether there is AC of outdoor unit mainboard input between AC L1 E and 1 circuit and fuse Normal Turn on test voltage between PN the voltage is If there is no voltage about 310 when compressor doesn t start up when Abnormal between PN then compressor start up normally the voltage between PNIS poi 380 replace PFC module Normal Check whether the
23. f compressor normally start up the voltage Abnormal p Abnormal Abnormal SIE Abnormal d between PN is V Normal Confirmed whether is there any two phase between U V W has voltage output and balanceable Abnormal Evenly coated the coolant on IPM module then install the power module Remove the obstruction clean and wash Replace the wiring If the voltage between PN is abnormal then should check the PFC module Replace power module Normal Test three phase resistance of compressor Abnormal Replace compressor Norma Whether the compressor is blocked or not Abnormal gt 23 Use new compressor for trial running that the original compressor blocked PFC protection HC or Heating indicator extinguish 3s blinks 6 times Cause Voltage change suddenly poor radiating of PfC module connection wire PFC control wire between power module and PFC module is poor connected over current ect Processing method the whole unit power off use multi meter to test the DC voltage between power module P N and make sure if there is no voltage between PN pull out the wire on P N then test the resistance between P N if the value is 0 the module damaged R
24. gt gt a a al a gt Note The above data are subject to be changed without notice
25. hanger temperature is very high Cause In Cool mode outdoor temperature is too high Shortage of outdoor air volume Refrigerant flow problem Q Processing method Pls refer to the Troubleshooting of prior part Module protection H5 or Heating indicator extinguish 3s blinks 5 times Processing method 22 Module protection Firstly use multi meter to test DC voltage between power module P and N confirm there is no voltage pull out the wire on P N U V W test resistance between P N U N V N W N if there is any resistance value is O that the module damaged v Replace power module Normal OL 1 JI Power module overheat protection check whether the coolant is coated evenly is there any obstruction in installation position whether the screws on powre module is tightened Check whether the outdoor unit heat exchanger radiating is good or not IF there is malfunction has been observed the power module malfunction indicator RED blinks for man times 99 1 SHUI 1 Are the wire insert is firmed inserted on power module P N U V W notilf there is carbonization phenomenon on the wiring terminal Normal After unit turned on test the voltage between PN if compressor dosnt start up the voltage is 310 i
26. hether it is short circuit of Yellow White terminals Use multimeter to test whether it is short circuit of Blue Brown Pull out the wire on terminal 1 and 2 of FILTER then power on for testing Tripped or not gt system board AP1 Examine the wiring of control board in indoor unit replace PCBof indoor unit d Replace FILTER Short ciruit or not Replace electric inductance L Replace radiator sub assy 29 PARTS GUIDE SINCLAIR CONDITIONING 1 FC E24AI exploclec View ancl ne p la Parts List m bs 3 10 1 4 IMesrFweek 1 6 Motor Suppot 00 8 Rere 01475252 T_T 9 Radiar 49013003 O 10 Power Module DYS2A 3220057 T 11 PFC Module JGPO11A O 30111018 1 12 ITeminalBoargRS9418G O 42010078 18 ITeminalBoargRS9413 420111041 3 14 Power Module DYS2PFC 32210088 1 1 15 Reactor LO 275uH 275uN 40A___ 491200 1 16 Module Bracket zi 1 17 FiterFN2030 30 08 4 1 ts ElecticPlaie 0406 1 19 Electric Plate cover O43 1 20 wanF BOBBITT 21 4WayValv Coli 430000
27. ion normal board AP1 according to x Finished circuit diagram for wiring 26 2 The red indicator LED101 blinks 5 times on the outdoor unit drive board AP3 PFC protection analysis Outdoor unit drive board AP3 red indicator LED 101 blink 5 times PFC protection According to wiring diagram to examine whether the wiring of electric box of outdoor unit is loosed especially the wiring on AP3 AP2 electric inductance L the connection wire from AP1 to AP2 No According to circuit diagram to correct wire connection method Is wiring method correct No p Malfunction disposed Yes After powered off for 3mins pull out 4pcs connection wire of electric inductance L from control board AP2 use multimeter test whether the Yellow White wire of electric inductance L is short circuit or not Replace electric inductance L No No Yes Malfunction disposed v Replace radiator sub assy including AP2 AP3 and radiator Yes Malfunction disposed Replace control board AP1 Finished 27 3 0101 blinks 5 times on the system board AP or LED1 on drive board blinks 3 times T1 drive module protection analysis D101 blinks 5 times on system board AP1 or LED1 on drive board blinks 3 times drive board AP3 protection and
28. isted in the resistance relay Zu communication birdge capacity Y PFC electric inductance 2 D 5 PEE uu out of outdoor lt 5 Check whether the power module Replace the power S Q lo is damaged or not module Normal En 3 C Check whether PFC module Replace PFC module 5 is damaged or not o Si Check whether 2 core wire between SE the outdoor mainboard and power module No has the voltage about 310V AC after gt Replace the mainboard communicated Normal 5 wire hasn t been reliabily gt connected or replace 5 core Wire Check 5 core wire between the outdoor unit mainboard and module module is J reliabily connected Whether i 5V 12V on 5 core wire is normal 5V 12V abnormal or replace or not power module Compressor overload protection or heating indicator extinguish 35 and blinks 35 Cause Refirgerant is shortage or overfull poor running of compressor axes clasp or blocked air exhaust valve damaged protector malfunction Processing method Adjust coolant volume Replace compressor Use multi meter check whether the contact of protector dredge if not replace the protector System abnormal H4 or heating indicator extinguish 3s blinks 4 times Overload protection the protection when tube temperature in Cool mode test outdoor heat exchanger temperature in Heat mode test indoor heat exc
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31. o 480P the side valve will turn off 2 Part of indoor unit arrive at unit stop running condition Compressor will not stop Compressor will run according to capacity requirement calculated frequency when capacity requirement is 0 indoor unit corresponding electron expansion valve 5s turns off compressor frequency variable start meanwhile running indoor unit no matter it is newly opened or indoor unit has been run the corresponding electron expansion valve resumes to the original value NOTE Unit off Fan Protection as the same with Cool mode 2 1 3 Switching from cooling mode to heating mode When turning to heating mode after compressor stopped 4 way valve will electrify after 2mins delay the others are the same with cooling 2 1 4 4 way valve control Under this mode 4 way valve will close that is not electrified 2 1 5 Outdoor unit fan motor control under cooling mode Before compressor start 5s start cooling after outdoor fan motor start up and run in high speed for 3min then according to the indoor unit rated capacity total amount and outdoor ambient temperature automatically select High Mid Low three fan speeds Other control When the newly opened indoor unit is running outdoor fan motor will run at high fan speed for 40s then according to control logic to adjust Fan motor each grade at least run 80s when indoor unit running quantities change and calculate indoor unit rated capacity total amount and according to temper
32. o work If compressor start up or compressor doesn t start up but the outdoor temperature is very high then the electric heating will not to work 2 4 9Chassis electric heating this function is optional it could be added according to the customer required When outdoor ambient temperature is very low condenser electric heating will start to work when outdoor ambient temperature is very high the condenser electric heating will not work When entering into Defrosting untile defrosting finished after compressor started up 3mins later the indoor chassis electric heating will start to work after compressor run 3mins and outdoor ambient temperature is very high the electric heating will stop to work 2 4 10 Sensor malfunction testing 1 At unit standby do not test the malfunction of outdoor tube sensor ambient sensor 2 Under Heat mode compressor continuously run 3mins later start to test the air exhaust sensor malfunction under other modes for testing all along 3 Under Heating mode compressor start up within 10mins after Defrosting Heating oil return later within 10mins do not test outdoor tube sensor malfunction 4 After other outdoor sensor turned on test the malfunction right away outdoor each sensor continuously test 305 5 After the sensor malfunction has been tested stop the unit right away 2 5 Malfunction indicator gay zq31 L031 pue dv uo 6
33. r is broken Replace the controller Trouble Shoot Batteries of remote controller p Change battery are low Remote controller does not receive Malfunction of remote controller First press the AUTO button of the 1 p 4l lt manual switch If there is no response check according to the above method send out a sound Loose or poor connection of receiving if it is normal after the button is Moe p pressed check if the installation unles it is broken head location and guire connection of the receiving head are correct 1 correct replace the receiving head or the m l remote controller Receiving head is broken 2 Malfunction display part When AC having malfunction or protection indoor unit displayer or indicator will display the corresponding codes indicator on outdoor unit mainboard also display the detailed contents has been discribed pls refer to the prior function part for more information when protection or malfunction removed and display resume to normal Partly display malfunction analysis or processing 20 Ing System high pressure protection E1 or running indicator extinguish 3s and blinks one time System high pressure protection Examine whether the pressure switch is damaged or not Yes after unit stopped pressure 3 6Mpa if pu
34. r will stop after 1min delay When tout ambient gt 15 C and indoor unit stop running or unit off meanwhile the outdoor unit will stop running 30 later restart again 2 3 5 Defrosting When satisfied with defrosting condition the system will enter into defrosting at this time the compressor will stop running All electron expansion valve will turn to 480P after compressor stop 40s later outdoor fan will stop meanwhile the four way valve will reversal after 4 way valve reversed all electron expansion valve will turn to 150p after expansion valve turned to preset positio compressor starts up and frequenctly run frequency limit frequency droop will be effective When defrosting condition finished has been satisfied defrosting will finish 2 3 6 Heating oil return control When heating running and produce oil return condition then send the oil return signal to indoor unit indoor unit will execute as oil return operation Compressor will stop running all electron expansion valve of indoor valve will turn to 480P all electron expansion valve turns to 480P then side valve will turn on Compressor stops 40s later 4 way valve will reversed Outdoor fan Firstly run at high speed 40s Before this if low fan speed rotate to high fan speed 405 At this time if it run at high fan speed that will maintain high fan speed runs for 405 4 way valve reversed all electron expansion valve will turn to 150P Expansion valve will turn to preset position
35. rt heating mode turns on the heating and arrive at the unit on temperature 2 3 2 Unit will stop for heating All indoor units arrived at unit off or unit stop condition compressor will stop outdoor fan unit will delay 1min will stop all the elctrictron expansion valve will start to work when all valves turn to OP adjustment the side valve will electrified when turn the valve to 480P the side valve will not electrified 2 3 3 Turns to Cooling dehumidifying Fan modes Compressor stop running four way valve will delay 2min and powered off outdoor fan will delay 1min and stop running 4 way valve will electrified the expansion valve will turn to OP for adjustment the side valve will electrify the valve will fully turn to 480P the side valve will power off 2 3 4 Outdoor fan control Heating start up and compressor start up before 5s running after outdoor fan start up and run in high speed 80s then according to indoor unit rated capacity total amount and outdoor ambient temperature will automatically select Hig Mid Low three fan speed Other control newly open indoor unit for running outdoor fan motor will run at high speed for 40s right away then adjust according to control logic Fan motor each speed runs 80s at least Indoor unit running quqntity changed will calculate the total amount of indoor unit rated capacity and according to the temperature to adjust the fan speed When compressor stop running outdoor fan moto
36. t through is normal Replace the high pressure switch Examine whether the outdoor unit is improper installed if there is any thing blocked bad ventilation Yes Adjust the installation position Examine whether the condenser or indoor unit Yes Clean and wash filter is dirty or blocked Examine the abnormity of motors of indoor and outdoor Check the motor wiring is correct units or not or replace the motor Examine whether the refrigerant system is blocked or not especially the capillary electric expansion valve etc such Replace the blocked sub assy these kinds of components Compressor air exhaust protection E4 or running indicator extinguish 3s blinks 4 times Air exhaust protection Examine whether the outdoor unit is improper installed if there is any thing blocked bad Yes Adjust the installation position ventilation Examine whether the condenser or indoor unit Yes AV Clean and wash filter is dirty or blocked Examine the abnormity of Yes motors of indoor and outdoor Check the motor wiring is correct units or not or replace the motor Examine whether the refrigerant system is blocked or not Yes especially the capillary electric expansion valve etc such Replace the blocked sub assy these kinds of components No Examine whether the refrigerant system leaked or not whether the system voltage is lower or not Reincharge the refrigerant 21 Communication malfunction E6 or r
37. te 5 Disassemble the electric box Unscrew the 4 screws fixing the electric box cover to remove the electric box cover And then unscrew the 4 screws fixing the electric box pull out each lead wire from the electric box remove the electric box Electric box 17 6 Disassemble the axial flow fan Unscrew the nut fixing the fan with a spanner to take out the fan Nut Axial Flow Fan L 5 n 7 Disassemble Motor Unscrew the screws fixing the motor support and then lift it upwards to remove it Unscrew the screws fixing the motor to remove it 1 lt 1 l la 1 j f a Motor Support 8 Disassemble Four way Valve Wrap the four way valve with wet cotton and unsolder the 4 weld connecting the four way valve to take it out Note Refrigerant should be discharged firstly Welding process should be as quick as possible and keep wrapping cotton wet all the time Be sure not to burn out the lead out wire of compressor Four way valve coll 18 9 Disassemble valve support sub assy bidirectional liquid liquid storage tank valve support sub assy should include gas liquid valves valve support air collective pipe Valve support electric magnetic expansion valve diffluence pipe Air collective pipe Unscrew the bolts which fixed the valve support unsolder the soldered points on bidire
38. ter 180s later that will resume If the continuous protection times excess 6 times if compressor running time excess 7min that the protection times will clean to 0 the system will turn off the unit and sent wrong signal to outdoor unit it cannot resume to running status It is need to resume after powered on 2 4 6 Compressor high pressure protection If continuously 3s detected the high pressure switch break off will treat as arrive at preset temperature point unit will stop meanwhile send the High pressure protection signal to indoor unit After the high pressure malfunction happened if onditnuously 6s detected the high pressure switch off should turn power off and repower on the whole unit can resume to work 2 4 7 Compressor overload protection If tested the compressor overload switch according to indoor temperature arrive at preset temperature condition unit will stop and display the corresponding malfunction compressor has stopped 3mins above and the compressor overload switch reset it will automatically resume to the running status If protection times more than 6 times if compressor continuously running time more than 7 mins that the protection times will clear to 0 that cannot automatically resume it should to turn the power off and repower again 2 4 8 Compressor electric heating control If outdoor ambient temperature is detected very low and compressor dosen t start up the compressor electric heating start t
39. the compressor will start up and runs at high frequency in a certain frequency When oil return maintain time arrives 5mins will finish 2 4 System protection function 2 4 1 Indoor unit modes confliction protection If the preset of indoor unit is different according to the following for running a Consider the first running indoor unit mode as the standard mode other indoor units modes compared to this mode and judge whether there is conflict happened Cool mode Dehumidifying conflicts with Heat mode b Fan mode conflicts with Heat mode consider heating as the basic mode no matter the sequence of units turns on indoor units conflict will run in heating mode 2 4 2 Overload protection Anti high temperature protection When Ttube temperature is tested very low compressor will run rise frequency when the temperature is tested very high the compressor will run at frequency limit or frequency drop if Ttube is very high compressor will stop running If the tube temperature overload protection 6 times continuously happened that the compressor cannot resume to run it needs to power on then it can resume During the operation if compressor running time exceed 7mins the overload protection times will clear to O 2 4 3 Air exhaust temperature protection When detected the Tair exhaust is very high frequency rise is forbidden If detected the Tair exhaust is very high compressor will run at drop frequency If detected the Tair exhaust is
40. unit will stop y Replace radiator sub assy including AP2 AP3 and radiator Yes Malfunction disposed No Y Replace control board AP1 Finished 4 LED1 on drive board AP3 blinks 10 times detected IPM module temp is very high on APS the unit will stop Detected IPM module temp is very high on drive board AP3 Poor installation of uu ee Yes Tighten screw coating white coolant n pe silica gel or directly replace the radiator white coolant silica SUA gel No v It s normal protection pls modify power voltage Finished 28 Trip after powered on According to circuit diagram to check if there is any problem of wiring in outdoor unit electric box Is there any problem Yes 5 Troubleshooting for trip after powered on According to diagram to correct Malfunction disposed Pull out BU connection wire on system board AP1 and BN on then powered on for testing Tripped or not Yes On the base of above connection wire then pull out X9 AC N on system board AP1 and Bu BN on X10 AC L then powered on for testing Tripped or not Pull out four pcs connection wire of electric inductance L use the multimeter to test w
41. unning indicator extinguish 3s and blinks 6 times Cause communication wire hasn t been reliabily wired or wrongly wired Indoor unit mainboard communication circuit module malfunction Outdoor unit communication circuit module malfunction abnormal power supply of outdoor unit or outdoor unit mainboard hasn t AC current input due to fuse burnt out Processing method e Communication wire hasn t been Make sure to wire correctly reliabily wired or wrongly wired testing after reliabily connected 3 Sg Communication resumed 5 Replace a new mainboard of indoor gt thatthe indoor unit Og unit communication circuit gt module has been damaged O 5 lt Repl inboard of outd eplace a new mainboard of outdoor pu Communication resumed that the outdoor unit E5 communication circuit module has been damaged Check whether the controller model of indoor and outdoor units are correct not No Check whether the wire is wrong Check whether there is any AC input gt not or the power plug is firmed inserted or not Check outdoor power supply circuit 15 there any malfunction 2 195 ex
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