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SERVICE MANUAL

1. 34 7 RI M M 37 S eene 38 dM Ne eMe 38 9 2 DISDIAV TUD CUO 38 So TIS EETO LOG 39 8 4 Operation Modes and 40 M 54 9 T Indoor Uhlt ete eed eee dede dede ete 55 9 2 Outdoor dnit error dISDlay 57 SIS SON 59 1 Precaution 1 1 Safety Precaution B prevent injury to the user or other people and property damage the following instructions must be followed B Incorrect operation due to ignoring instruction will cause harm or damage B X Before service unit be sure to read this service manual at first 1 2 Warning Installation B Donot use a defective or underrated circuit breaker Use this appliance on a dedicated circuit There is risk of fire or electric shock B For electrical work contact the dealer seller a qualified electrician or an Authorized service center Do not disassemble or repair the product there is risk of fire or electric shock B Always ground the product There is risk of fire or electric shock B install the panel and the cover of control box securely There 1 risk of fire of e
2. O optional function 3 Dimension 3 1 Indoor Units MS9A 09HRDN1 MPOW 790 265 198 MS9A 09HRDN1 BQOW 31 10 10 43in 7 80in MS9A 09CRDN1 BSOW MS9A 09HRDN1 BSOW MS9A 12HRDN1 MPOW MS9A 12CRDN1 BSOW 920 292 223 MS9A 12HRDN1 BSOW 36 22in 11 50 8 78 MS9A 12CRDN1 MSOW MS9A 12HRDN1 MSOW MS9A 12HRDN1 BSOW B MS9A 18HRDN1 MPOW MS9A 18CRDN1 MSOW 27 225 39 29 12 68 9 45in MS9A 24HRDN1 MPOW MS9A 24CRDN1 MPOW 14 4 2 MS9A 24HRDN1 MSOW ee ind d 57 09 13 39 10 43in Dimension of installation hole mm MS9A 09HRDN1 MS9A 09HRDN1 BQOW _ H 2 j 23 X 5 V Helo T b lt Q gt 2 0 4 U D E O O l gt E3 1 35 ____________________
3. on Compressor off SOR werten iE Sie Rowe woes 6 on ME 4 way valve off A mE on ean Outdoor fan off TUM sche a es gt m m Ns wy Indoor fan off te Cg 25 10 Indoor fan breeze 10s 10 gt longer than 10m _ 30s 60 8 4 3 5 Evaporator temperature protection T2 gt the compressor running frequency decreases to the lower level and runs for 20s When the frequency decreases to F2 and the T2 is still over TEH2 C for 3 minutes the compressor will stop 12 lt 48 or T2 stays in 48 2 for 6 minutes the frequency will not be limited by T2 T2 60 the compressor will stop and restart when T2 48 8 4 4 Auto mode This mode can be chosen with remote controller and the setting temperature can be changed between 17 30 In auto mode the machine will choose cooling heating or fan only mode according to AT T1 Ts Indoor fan will run at auto fan the relevant mode The louver operates same as in relevant mode If the machine switches mode between heating and cooling the compressor will keep stopping for 15 minutes and then choose mode according to T1 Ts If the setting temperature is modified the machine will choose running function again 8 4 5 Drying mode 8 4 5
4. NOTE Four way value is used in the Cooing amp Heating unit only YELLOW Y G om gue vs 1020 D BSS sae L POWER SUPPLY DISCHARGE SENSOR 5 RED CAPACITOR SEAN INDOOR UNIT MOF 24HDN1 MPOW HEAT EXCHANGER 28508 OPTIONAL HEATER 202037990441 OLP TEMP SENSOR AMBIENT SENSOR WHITE T4 ne xr OUTDOOR MAIN PCB BLUE BLUE COMPRESSOR Y G D YELLOW 2 YELLOW REACTOR2 R6025 trou REACTOR R1815 1 ORANGE 0 YELLOW CAPACITOR Ee eese eese mene La EE E ELE Ee E D 2 OUTDOOR FAN GND L1 12 S FS TS TO INDOOR UNIT POWER SUPPLY 23 MOG 24HDN1 MSOW 202038090667 5 WAY TERMINAL OUTDOOR COMPRESSORDISCHARGE TEMP SENSOR 15 LZ CN22 WHITE e T4 OUTDOOR ROOM TEMP SENSOR CN19C RED BLACK Y G e CN18 CN5 C POWER SUPPLY OUTDOOR HEAT EXCHANGER TEMP SENSOR MAIN BOARD wee NES 4 BLUE NOTE Four way value is used in the Cooing em OPTIONAL s Hestingunitony WHITE HEATILCN7 OPTIONAL HEATI CN10 BLACK RED RY1T T HEAT2 CN31 HEAT2 CN33 Q CN12 BLACK C yen DETECTOR 0 11 P 1 E P3 LOCO S fans 5 CAPACIT
5. Yes Replace the outdoor control PCB Recharge the correct refrigerant volume 67 9 3 10 Inverter compressor drive error diagnosis and solution P4 Check if the wiring between main PCB and compressor connected by error and if the wires and connectors are broken NO Y Check if the IPM installed correctly Yes y IPM continuity check Check if the IPM terminal resistance values are uniform Check if the outdoor fan runs properly or the outdoor unit ventilation is good Correct the connection or Yes y replace the wires and connectors Correct the installation No No y tighten the screws and apply silicon grease No Yes y Check if the compressor resistance values are uniform No Y Replace the outdoor main PCB if the main PCB and IPM are separate 68 v Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together Refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved Replace the compressor Main parts check Temperature sensor checking Disconnect the temperature sensor from PCB measure the resistance value with a tester Tester Temperature Sensors temp T1 sensor
6. Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp T5 sensor Measure the resistance value of each winding by using the multi meter Table 1 Some frequently used data for T1 T2 T3 and T4 sensor Tempero 5 9 s m m w w w Resistance vate Ka 59 207 125 52 ss ea Table 2 Some frequently used R T data for T5 sensor Temperate s frs s w 70 e sw Resistance 11e es 569 366 ws s 57 Resistance value 4 ja T1 T2 T3 T4 Temperature 69 70 Appendix WEN PNOEM NE 00 _ s e e 70 72 74 24 25 26 27 28 29 30 C1 F 76 78 80 684 71
7. It may cause corrosion on the product Corrosion particularly on the condenser and evaporator fins could cause product malfunction or inefficient operation Operational B Donotexpose the skin directly to cool air for long periods of time Do not sit in the draft This could harm to your health B Do not use the product for special purposes such as preserving foods works of art etc It is a consumer air conditioner not a precision refrigerant system There is risk of damage or loss of property B Donot block the inlet or outlet of air flow It may cause product failure B Use a soft cloth to clean Do not use harsh detergents solvents etc There is risk of fire electric shock or damage to the plastic parts of the product B Do not touch the metal parts of the product when removing the air filter They are very sharp There is risk of personal injury B Do not step on or put anything on the product outdoor units There is risk of personal injury and failure of product B Always insert the filter securely Clean the filter every two weeks or more often if necessary A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or 4 damage B Donotinsert hands or other object through air inlet or outlet while the product is operated There are sharp and moving parts that could cause personal injury B X Donotdrink the water drained from the product It is
8. defective Replace indoor main PCB Correct the connections Turn on the unit when the power supply is good 9 3 4 Fan speed has been out of control diagnosis and solution E3 E7 Shut off the power supply and turn it on 5 seconds gt he unit operates normally later Is it still displaying the error code ve Find out the cause and Shut off 2 power supply 2 ie rotate the fan hand No vaL a Does it rotate properly whether the fan 15 blocked or the bearing is broken Yes Check m wires of fan motor Are all the NO Correct the connections T good v If the Check the fan malfunction is motor is normal through NO P still existing motor index 1 replace the A A main PCB No Replace the Check whether the main PCB is POR gt normal through index 2 TM malfunction is solved Yes 61 Index 1 1 Indoor AC Fan Motor Measure the resistance value of each winding by using the tester LE P d es Input Terminal eee ES Red 1 Black 2 2 gt White White 3 4 Q V Vv jJ Black J bw E For the definite value of the resistance contact the technical engineer 2 Outdoor DC Fan Motor control chip is in fan motor Measure the res
9. 1 Indoor fan speed is fixed at breeze and can t be changed The louver angle is the same as in cooling mode 8 4 5 2 Compressor running rules 11 15 AE 2 0 15 0 5 0 0 8 4 5 3 Low indoor room temperature protection In drying mode if room temperature is lower than 10 the compressor will stop and not resume until room temperature exceeds 12 8 4 5 4 Evaporator anti freezing protection condenser high temperature protection and outdoor unit frequency limit are active and the same as that in cooling mode 8 4 5 5 The outdoor fan operates the same as in cooling mode 8 4 6 Forced operation function 8 4 6 1 Enter forced operation function When the machine is off pressing the touch button will carry the machine to forced auto mode After this pressing the button once again within 5 seconds the machine will turn into forced cooling mode In forced auto forced cooling or any other operation mode pressing touch button will turn off the 51 machine 8 4 6 2 In forced operation mode all general protections and remote control are available 8 4 6 3 Operation rules Forced cooling mode The compressor runs at F2 frequency and indoor fan runs as breeze After running for 30 minutes the machine will turn to auto mode as 24 setting temperature Forced auto mode The action of forced auto mode is the same as normal auto mode with 24 setting temperature 8 4 7 Time
10. 4 8 3 Timer setting is available 8 4 8 4 When user uses timer off function in sleep mode or sleep function in timer off mode if the 52 timing is less than 7 hours sleep function will be cancelled when reaching the setting time If the timing is more than 7 hours the machine will not stop until reaches the setting time in sleep mode 8 4 9 Auto Restart function The indoor unit is equipped with auto restart function which is carried out through an auto restart module In case of a sudden power failure the module memorizes the setting conditions before the power failure The unit will resume the previous operation setting not including swing function automatically after 3 minutes when power returns If the memorization condition is forced cooling mode the unit will run in cooling mode for 30 minutes and turn to auto mode as 24 setting temp If AC is off before power off and AC is required to start up now the compressor will have 1 minute delay when power on Other conditions the compressor will have 3 minutes delay when restarts 8 4 10 Heating optional In heating operation the preset temperature of the air conditioner can be as lower as 8 C which keeps the room temperature steady at 8 and prevents household things freezing when the house is unoccupied for a long time in severe cold weather 53 9 Troubleshooting Safety Electricity power is still kept in capacitors even the power supply is shut off Do not forget
11. Please refer to the nameplate before selecting the cable fuse and switch 26 6 3 Pipe length and the elevation The pipe length and refrigerant amount Connective pipe Air purging method Additional amount of refrigerant to be charged A 9k 12k More than 5m Pipe length 5 x 20g m 18k 24k More than 5m Pipe length 5 x 40g m Standard Max length Elevation B m 9k 12k 18k 24k Indoor unit Indoor unit Outdoor unit Caution The capacity test is based on the standard length and the maximum permissive length is based on the System reliability The oil trap should be installed per 5 7 meters 27 6 4 Installation for first time Air and moisture in the refrigerant system have undesirable effects as below Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrigerant circuit may freeze and block capillary tubing Water may lead to corrosion of parts in the refrigerant system Therefore the indoor units and the pipes between indoor and outdoor units must be leak tested and evacuated to remove gas and moisture from the system Gas leak check Soap water method Apply soap water or a liquid neutral detergent on the indoor unit connections or outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping If bubbles come out the pipes have leakage 1 Air purging with vacuum pump I
12. pressure of the low side disconnect the charge 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 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 6 6 Re installation while the indoor unit need to be repaired 1 Collecting the refrigerant into the outdoor unit r 1 2 Indoor unit unit 1 Outdoor unit m 2 Gas side H TZ 7 ino p d a 3 way valve 1 1 Confirm that both the 2 way 3 way valves to the opened position the valve stem caps and confirm that the valve stems are in the opened position Be sure to use a hexagonal wrench to operate the valve stems 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Air purging of the charge hose Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to the close position 32 5 Operate the air conditioner the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immediately Do this quickly so that the gauge ends up
13. to discharge the electricity power in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION Connect discharge resistance 1000 40W or soldering iron plug between terminals of the electrolytic capacitor on the contrary side of the outdoor PCB Discharging position Discharging period 10 seconds or more Plug of M soldering Ina iron X 6 A PL im amp 55 S A y OA COL SY P Note The picture above is only for reference The plug of your side may be different 54 9 1 Indoor Unit Error Display Open circuit or short circuit of outdoor temperature sensor or outdoor unit EEPROM parameter error Open circuit or short circuit of room or evaporator temperature sensor Outdoor fan speed has been out of control only for O gt MS9A 09HRDN1 BQOW MS9A 12HRDN1 BSOW B MS9A 09CRDN1 BSOW MS9A 12CRDN1 BSOW MS9A 09HRDN1 BSOW MS9A 12HRDN1 BSOW MS9A 18CRDN1 MSOW MS9A 12HRDN1 MSOW MS9A 18HRDN1 MSOW IPM malfunction or IGBT over strong current protection Over voltage or too low voltage protection Temperature protection of compressor top except MS9A 24HRDN1 MPOW 270033000364 MS9A 24HRDN1 MSOW 210033000389 Co Outdoor temperature is lower than 15 optional function Inverter compressor drive error Note E4 amp Reserved function DA Note If the ou
14. 9ASUL A1 1211 Midea SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL MOUNTED 4 CONTENTS lt a 1 geese 1 PZ aaa aaa aaa 1 ZA iei 6 3 POMC ime 8 em see melt TUE 8 3 2 ize 11 A Refrigerant Cvele Diagran Roe 12 a MM 14 E 14 A AO OEA A E 19 6 InstallatiOn detalls a a a 25 6 1 Wrench torque sheet for installation 25 BZ 26 Ihe 27 6 4 INStallatiOn TOF the 28 6 5 Adding the refrigerant after running system for many years 31 6 6 Re installation while the indoor unit need to be 32 6 7 Re installation while the outdoor unit need to
15. G mesg oS LIN OUTDOOR UNT 2 oe eee RRR 1 OPTIONAL Sly SL fl S 5 SWITCH BOARD 3 NE 4 AZ 0 CN3 OPTIONAL an SWING CN S lt L DISPLAY BOARD m Ad EN eno f DECORATIVE LOUVER MOTOR INDOOR PCB M1 NIN ST 2 DECORATIVE LOUVER MOTOR js m CN43 Earth ar 2 I 9 9 N S 2 YIG TRANSFORMER 4 A OPTIONAL LS PLASMA 18 5 2 Outdoor Units MOC 09HDN1 MPOW MOC 12HDN1 MPOW HEAT EXCHANGER SENSOR DISCHARGE SENSOR OPT ow HEA A ANBIBIT SENSOR OLP TELP SENSCRR as 52 CN34 CN32 CN31 CN33 OUTDOOR MAIN PCB COMPRESSOR Y G Ah lt CN3 CN1 YELLOW OUTDOOR WIRING DIAGRAM CAPACI TOR DISCHARGE smar 14 i NOTE Four way values OUTDOOR y Y 5 used in the MAIN Cooing amp Heating PCR unit only BLUE cL COMPRESSOR m dp a 10 2 2102 L YIG STSTSTSISIS di H POWER SUPPLY REACTOR HT GI TOR WHITE OUTDOOR WIRING DIAGRAM MOC 12CRDN1 MS0W MISCIAPRE SEI OP 11 WHE Se rwn an BLAC
16. IT This symbol indicates the element is actual shape shall be prevail MS9A 09HRDN1 BQOW 202052090106 INGEAN Notes 2 2 Y 6 ToN H This symbol indicates the element 1 5 actual shape shall 3 3 mm BLACK JL PIPE TEMP SENSOR CN12 all EXE U ayy INDOOR PCB CN10 ROOM TEMP SENSOR 1 1 0416 Y G oo DISPLAY BOARD L U Op D 2 2 2 Y G Y A e OPTIONAL LN V 3 PLASMA OUTDOOR UNIT m ER MICRO SWITCH MS9A 12HRDN1 BSOW B 202052090068 SWING 106 44 N12 8 CN9 CN25 CN5 CN5 1 JO RYI 0 0 4 CN10 Y G 0 2 CM4 PH E X I1 J 19909119 G9 TO OUTDOOR UNIT 3 TRANSFORMER DISPLAY BOARD 16 MS9A 24CRDN1 MPOW SWIMG 202033090774 7 FAN CAPACITOR BOARD _ 0 rae 88 CM lt 7 D a a ae GREC 5 D UNIO SN gt 2 OPTIONAL 7 21 ome 3 Uo SWITCH BOARD M S Oe R c OUTDOOR UNIT Notes This symbol indicates the element 15 optional the actual shape shall be 17 MS9A 24HRDN1 MSOW 202033090856 RED YELLOW Y
17. K P EBEN CH18 CHO OUTDOOR MAIN PCB C COMPRESSOR YELLOW ELLEN IE OUTDOOR WIRING DIAGRAM MOC 12HRFN1 MSOW REACTOR2 6025 REACTOR R1310 CAPAC TOR EXCEAREP BLACK n 1 1 c ASBIEHT WHITE C Ni5 usame LLLI L OUTDOOR MAIN PCB 20 via p PIE BIET PLI nefs alele 5 TO INDOOR UNIT POWER SUPPLY 3 OUTDOOR OPTIONAL HEATER 1 T l EF Hope 2 BUE ki YG F e nre rre re E Li 8 Li L DUTDOOR Y FAN jJ MOF 18HDN1 MPOW MET 1 ELAN LBIENT D ITE n CHB EXE CHE i X BLUE REL V OUTDOOR MAIN PCE _ INDOOR UNIT POWER SUPPLY OUTDOOR WIRING DIAGRAM MOF 18CRFN1 MSOW AMBIENT HEAT EXCH ANGER SENSOR SENSOR BLACK WHITE 1 DISCHARGE SENSOR SENSOR 3 us YELLOW 1 REACTOR 6025 OUTDOOR ORANGE FAN 2 FEACTORI 1815 3 ORANGE YELLOW OUTDOOR WIRING DIAGRAM CAPACTOR 21 MOF 18HRFN1 MSOW RE
18. OR BLUE RED BLACK FAN CAPACITOR posee cer 1 CAP1 v COMPRESSOR 3 R2503 ERES RE MOF 24CDN1 MPOW HEAT EXCHANGER SENSOR DISCHARGE 8608 1 202038090748 mmen 1 m OPT I ONAL HEATER ap me man ASS sack KE arr eren DOO O cN14 O O CN31CN34 CN32CN33 Y G YELLOW U BLUE gt aa RED 5 C O BROWN BLUE Y G gt W OUTDOOR CN6 MAIN PCB RY3 Y G 81 1 SL SL 8 L2 S TO INDOOR UNIT POWER SUPPLY COMPRESSOR Y G CN3 1 CN2 OO 2b 5 ourpooR N B m SIS FAN YELLOW REACTOR2 R6025 ORANGE eo R1815 3 D ORANGE YELLOW CAPACITOR 24 6 Installation details 6 1 Wrench torque sheet for installation 12 7 1 2 3500 357kgf cm 3600 367kgf cm 015 9 5 8 4500 459kgf cm 4700 479kgf cm 19 3 4 6500 663kgf cm 6700 683kgf cm 25 6 2 Connecting cables The power cord of connect should be selected according to the following specifications sheet ApplianceAmps AWG Wire Size The cable size and the current of the fuse or switch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit
19. TURN AMBIENT SENSOR SENSOR WHITE HEAT GER SEN SOR BLACK DISCH ARGE SENSOR SENSOR CN 14 YAS YELLOW Li 8 L1 Um U V x Oho e BROWN ere s OMPRE 508 Y L CH31 CH26 CH2 28 OPTIONAL HEATER THEE YELLOW Heater 2 E TX RESO Uem FERCTORI RIBH5 eem 3 RED ORANGE i OUTDOOR WIRING DIAGRAM MOG 24HDN1 MPOW YELLOW OUTDOOR UNIT WIRING DIAGRAM 5 TERMINAL OUTDOOR GOLPRESSOR DISCHARGE TELP SENSOR Hn un T4 WHITE QU 000 ROOL SENSOR onia n 4 CNS D BLACK OUTDOOR HEAT EXCHANGER TELP SENSOR MAIN BOARD 7 W iuri CHE value is used in the Cooing WIE emn OPTIONAL amp Heating unitonly HEATER OPTIONAL 10 Li WHITE BED H HEAT CN31 HEATER HEAT CN33 H ONT CNT 2 py FXr x V CTI ELECE CURREN T DETECTOR 3CN32 CAPACITOR 1 COMPRESSOR 22 09 1 MOC 12HFN1 BSOW 202037590789 1 1 m ANBI pir o lt 52 L ere OUTDOOR MAIN PCB U BLUE RED COMPRESSOR YIG D
20. c e EMEN M ee et cM Model L mm R mm H mm Dimension of installation hole mm MS9A 09CRDN1 BS0W MS9A 09HRDN1 BS0W MS9A 12HRDN1 MPOW 150 187 45 MS9A 12CRDN1 BSOW MS9A 12HRDN1 BSOW MS9A 12CRDN1 MSOW MS9A 12HRDN1 MSOW MS9A 12HRDN1 BSOW B Dimension of installation hole mm Dimension of installation hole mm MSSA 4HRDNI MSOW 1205 3 2 Outdoor Units More than 30cm More than 60cm Service space More than 30cm ap H 60 44 _ x Air inlet MOG 24HDN1 MPOW 900 315 860 980 590 333 MOG 24HDN1 MSOW 35 43 12 40in 33 86in 38 58in 23 23in 13 11 845 320 700 908 560 335 33 27in 12 60in 27 56in 35 75in 22 05in 13 19in MOF 18HDN1 MPOW 760 285 590 823 530 290 29 92 11 22 23 23in 32 40in 20 87in 11 42in 11 4 Refrigerant Cycle Diagram For cooling only models INDOOR OUTDOOR LIQUID SIDE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE EVAPORATOR CONDENSER GASSIDE COMPRESSOR For heat pump mode
21. e charging cylinder and set the 2 way and 3 way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems 7 Mount the valve stems nuts 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 3 Adding the refrigerant if the pipe length gt 5m Outdoor unit 7 Indoor unit ZZ Liquid side NN e gt 7 FA 2 way valve N nd ju S ey 3 way valve Charging cylinder Electronic scale Procedure 1 Connect the charge hose to the charging cylinder open the 2 way valve and the 3 way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure the 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 the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 30 6 When the electronic scale displays the proper weight refer to the table d
22. eep the current frequency No limitation for frequency Note When AC is in hold zone for 3 minutes the compressor frequency will rise to the higher level The frequency will increase twice at most 8 4 3 2 Outdoor fan running rules Tai Low 17 15 High 8 4 3 3 Indoor fan running rules For 9k 12k MS9A 18HRDN1 MSOW models T2 vc d Setting 44 38 37 Low 34 33 Breeze TEL1 TELO ae reeze TEL1224 TELO 17 46 For other models Setting 44 38 gt 37 Low 34 Breeze Off If the compressor stops caused by the room temperature rising the indoor fan will be forced to run 127 seconds with breeze During this period the anti cold wind is disabled If the machine runs in rating capacity test mode the indoor fan will run with rating speed and the anti cold wind function is disabled Indoor fan speed can be set as high medium low or auto fan and the anti cold wind function is preferential Auto fan action in heating mode 4 Low 2 5 Medium 1 5 EN High Y 8 4 3 4 Defrosting mode Condition of defrosting T4 gt 0 When the units are running if the following two items are satisfied the units start defrosting The units run with T3 lt 3 C for 40 minutes and T3 keeps lower than TCDI C for more than 3 minutes The units run with lt 3 for 80 minutes and
23. erature is displayed 3 Indoor fan can be set to high med low auto 4 The louver operates same as in cooling mode 5 Auto fan 27 5 27 25 5 25 Y Low 40 8 4 2 Cooling Mode 8 4 2 1 Compressor running rules The operation frequency of compressor after starting submits to following rule 14 4 C Fmax F4 45 43 40 Fmax F7 38 30 Fmax F8 28 22 Fmax F6 20 Fmax F3 If users switch on by remote controller the compressor will run at the Fmax frequency for 7 minutes according to the outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below 11 6 UP While the zones corresponding to different compressor running frequency Note When T1 Ts keeps in the same temp zone for 3 minutes the compressor will run as the below rules Increase the frequency to the higher level until to F8 F Keep the current frequency 41 G Decrease the frequency to the lower level until to F1 Run at F1 for 1h if T1 Ts lt 2 C the compressor will stop Meanwhile the compressor running frequency is limited by the current I3COOL d 2 Hold I1COOL Resume Compressor stops Decrease Decrease the running f
24. flooded or submerged contact an Authorized service center There is risk of fire or electric shock B Be caution that water could not enter the product There is risk of fire electric shock or product damage B Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock B Turn the main power off when cleaning or maintaining the product There is risk of electric shock B When the product is not be used for a long time disconnect the power supply plug or turn off the breaker There is risk of product damage or failure or unintended operation B Take to ensure that nobody could step on or fall onto the outdoor unit This could result in personal injury and product damage CAUTION B Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product B Install the drain hose to ensure that water is drained away properly A bad connection may cause water leakage B Keeplevel even when installing the product It can avoid vibration of water leakage B Donotinstall the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem for your neighbors B Use two or more people to lift and transport the product Avoid personal injury B Donot install the product where it will be exposed to sea wind salt spray directly
25. he charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 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 Mounted the valve stem caps and the service port 35 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 36 7 Operation characteristics Temperature Cooling operation Heating operation Drying operation 0 C 50 32 F 122 Outdoor temperature 15 C 50 C 5 F 122 F For the models with 15 C 30 C 0 C 50 C 5 F 86 F 32 F 122 F low temperature cooling system CAUTION 1 If air conditioner is used outside of the above conditions certain safety protection features come into operation and cause the unit to funct
26. heck if the problem happen again 64 9 3 6 IPM malfunction or IGBT over strong current protection diagnosis solution PO Check if the wiring between main Correct the connection or PCB and compressor connected by replace the wires and error and if the wires and connectors connectors are broken Y Correct the installation Check if the IPM installed correctly No tighten the screws and apply silicon grease Yes Y IPM continuity check Check if the Replace the IPM board or replace IPM terminal resistance values are gt the main PCB if the IPM board and uniform main PCB are integrated together Yes Refer to the solution of fan speed has been out of control properly or the outdoor unit 3 ape malfunction Find out the cause ventilation is good and have it solved Yes Check if the compressor resistance No 4 Replace the compressor values are uniform Yes Y Replace the outdoor main PCB if the main PCB and IPM are separate 65 9 3 8 Over voltage or too low voltage protection diagnosis and solution P1 v Disconnect the unit with power supply and try to restart the unit when power supply gets normal Check if the power supply is No normal Yes Check if all the connect
27. ic shock B Donot plug or unplug the power supply plug during operation There is risk of fire or electric shock B Do not touch operation the product with wet hands There is risk of fire or electric shock B Do not place a heater or other appliance near the power cable There 1 risk of fire and electric shock B Do not allow water to run into electric parts It may cause fire failure of the product or electric shock B Do not store or use flammable gas or combustible near the product There is risk of fire or failure of product B Do not use the product a tightly closed space for a long time Oxygen deficiency could occur B When flammable gas leaks turn off the gas and open a window for ventilation before turn the product on Do not use the telephone or turn switches on or off 2 There is risk of explosion or fire B strange sounds or small or smoke comes from product Turn the breaker off or disconnect the power supply cable There is risk of electric shock or fire B Stopoperation and close the window in storm or hurricane If possible remove the product from the window before the hurricane arrives There is risk of property damage failure of product or electric shock B Donot open the inlet grill of the product during operation Do not touch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failure B When the product is soaked
28. indicating 0 3 to 0 5Mpa Disconnect the charge set and tighten the 2 way and 3 way valve s stem nuts Use a torque wrench to tighten the 3 way valves service port cap to a torque of 18N m Be sure to check for gas leakage 2 Air purging by the refrigerant mm A 3 way valve E 1 Charging cylinder Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge 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 valves on the charging cylinder and the charge 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 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant 33 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 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems 7 Mount the valve stems nuts and the service port Be sure to use a torque wrench to tighten the service port ca
29. ion abnormally 2 Room relative humidity less than 8096 If the air conditioner operates in excess of this figure the surface of the air conditioner may attract condensation Please sets the vertical air flow louver to its maximum angle vertically to the floor and set HIGH fan mode 3 Optimum performance will be achieved within this operating temperature 3 8 Electronic function 8 1 Abbreviation T1 Indoor room temperature T2 Coil temperature of evaporator T3 Coil temperature of condenser T4 Outdoor ambient temperature T5 Compressor discharge temperature 8 2 Display function 8 2 1 Icon explanation on indoor display board ry A un 4 2 run auta timer def CJ D LUNES 1 1 2 21 5 25 TA gt mimi numm _ m _ NE Ch 2 3 UN auto timer defrost ion auta imer defras ian 19 L di TX timer def iz rur E po e signal A 7 OPERATION indication lamp This lamp illuminates when the air conditioner is in operation AUTO indication lamp Lights up during the Auto operation lon indication lamp optional function Lights up when Clean Air feature is activated and lonizer can generate abundant anions to fill the room with refreshing and natural ai
30. ions and wires are good Yes v Power on and when the unit is in standby check if the voltage between P and N is around DC 310V or 340V or 380V For different Correct the connections or replace the wires kinds of units the voltage differs No Consult with technical engineer to get definite value Then start up the unit measure the voltage between P Is it in 220V 400V Yes Y Replace outdoor main PCB J Replace the IPM board if it is separate with main PCB 66 9 3 9 High temperature protection of compressor top diagnosis and solution P2 Check if the air flow system Yes of indoor and outdoor units are obstructed Y Turn off the power supply and turn it on 10 minutes later Yes Y Clear up the air inlet and outlet or the heat exchanger of indoor and outdoor units Check if all the connection especially Check if the unit can start normally Yes Y Check if the refrigerant the connection of OLP Over Load Protector sensor is good Yes Y Measure the resistance between the two ports of charge volume is normal Yes v Refrigerant system is blocked such as capillary or welded point of pipes the OLP Is it zero No Correct the connection No Replace the OLP v
31. isconnect the charge 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 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 6 5 Adding the refrigerant after running the system for many years Indoor uni Liquid si Indoor unit Liquid side e Outdoor unit mE UZA WY 7 2 way valve N w Gas side LXX Y p 5 Check o 3 way valve x y cylinder Electronic scale Procedure 1 Connect the charge 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 bottom up 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 the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 31 6 When the electronic scale displays the proper weight refer to the gauge and the
32. istance value of each winding by using the tester If any resistance value is zero the fan motor must has problems and need to be replaced gt 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 has problems and need to be replaced Input Terminal Es N 5 Red 1 S Black 2 gt White 3 Gel VOV _ Black 2 Outdoor DC Fan Motor control chip is fan motor Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 fan motor connector If the value of the voltage is not in the range showing in below table the PCB must has problems and need to be replaced 62 NO Color Signal Voltage 1 Red 280V 38V 6 Be re HN 63 9 3 5 Open circuit or short circuit of temperature sensor diagnosis and solution E5 E6 between temperature Check the connections N sensor and main PCB NO Correct the connections Are the connections good Yes Check the resistance value indoor or outdoor main of the sensor via table1 Yes P and table 2 is it normal No Replace the sensor c
33. keeps lower than 2 for more than 47 minutes T4 lt 0 If the 15 condition and 27 condition items are satisfied then the program judges if 2 has decreased more than 5 C When T2 has decreased more than 5 enter the defrosting mode No matter what value T4 is if the machine runs with T3 lt 3 C for more than 120 minutes and T3 keeps lower than 4 for more than minutes the machine will enter defrosting mode no matter if T2 drops more than 5 or not Condition of ending defrosting If any one of the following items is satisfied the defrosting will finish and the machine will turn to normal heating mode T3 rises to be higher than T3 keeps to be higher than 2 for 80 seconds The machine has run for 10 minutes in defrosting mode 48 Defrosting action For 18k 24k models F2 Frequency F8 on Compressor off nope aep P dE E on EL LEM ig 4 way valve off 2552 on bom off DTP ie thes gunk oe On 2 DEEP Indoor fan off 105 Indoor fan breeze 10s XX 10 no longer than 10m 305 MS9A 18HRDN1 MSOW 8 MS9A 24HRDN1 MSOW MS9A 18HRDN1 MPOW MS9A 24HRDN1 MPOW MS9A 24CRDN1 MPOW 49 For other models Frequency F2 FrequencyF8_
34. lectric shock B Always install a dedicated circuit and breaker Improper wiring or installation may cause fore or electric shock B Use the correctly rated breaker of fuse There is risk of fire or electric shock B not modify or extend the power cable There is risk of fire or electric shock B Do not install remove or reinstall the unit by yourself customer There is risk of fire electric shock explosion or injury B Be caution when unpacking and installing the product Sharp edges could cause injury be especially careful of the case edges and the fins on the 1 condenser evaporator B For installation always contact the dealer or an Authorized service center There is risk of fire electric shock explosion or injury B Donot install the product on a defective installation stand It may cause injury accident or damage to the product B Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury B Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open Moisture may condense and wet or damage furniture B Take care to ensure that power cable could not be pulled out or damaged during operation There is risk of fire or electric shock B Do not place anything on the power cable There 1 risk of fire or electr
35. ls INDOOR OUTDOOR CHECK VALVE LIQUID SIDE Heating Model only x lt 5 4 OOD 2 WAY VALVE v CAPILIARY TUBE _ HEAT HEAT EXCHANGE EXCHANGE EVAPORATOR CONDENSER gt GAS SIDE v 3 WAY VALVE REVERSING VALVE Heating Model only ACCUMULATOR 4 COOLING COMPRESSOR 4 13 5 Wiring Diagram 5 1 Indoor Units MS9A 09HRDN1 MPOW MS9A 12HRDN1 MPOW MS9A 12CRDN1 MSOW MS9A 12HRDN1 MSOW INDOOR WIRING DIAGRAM on 5 CNS OPTIONAL 11125 Qni L INDOOR UNIT ram PLASMA TO OUTDOOR UNIT TRANSFORMER MS9A 09CRDN1 BSOW MS9A 09HRDN1 BS0W MS9A 12CRDN1 BSOW MS9A 12HRDN1 BSOW INDOOR WIRING DIAGRAM M Tu 3 OPTION AL IONIZER WS NN OM CS Ce LL os u DISPLAY BOARD P1 1 T um LE g MS9A 18HRDN1 MPOW MS9A 18CRDN1 MSOW MS9A 18HRDN1 MSOW MS9A 24HRDN1 MPOW INDOOR WIRING DIAGRAM 311 0 0 Kol Tm ITA OPTIONAL ont D 3 BOAR JWI TCH BOARD a QU TDOCR UN
36. n of the vacuum pump Confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 7 Turn the flare nut of the 3 way valves about 45 counterclockwise for 6 or 7 after the gas coming out then tighten the flare nut again Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve 2 Air purging by refrigerant I qae o 9 side LE Charging cylinder Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge 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 charge 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 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant 29 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 3 to 0 5 Mpa 6 Disconnect the charge set and th
37. ndoor unit y gea 6 side Outdoor unit NU Gas side C 2 Three way valve Manifold valve Close Compound meter tO auge AME Q U Handle Lo Handle Hi Charge hose hose E Vacuum P Vacuum pump 1 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 closed position 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Connect the charge hose of handle hi connection to the vacuum pump 4 Fully open the handle Lo of the manifold valve 5 Operate the vacuum pump to evacuate 6 Make evacuation for 30 minutes and check whether the compound meter indicates 0 1 If 28 the meter does indicate 0 1 after pumping 30 minutes it should be pumped 20 minutes more If the pressure can t achieve 0 1Mpa after pumping 50 minutes please check if there are some leakage points Fully close the handle Lo valve of the manifold valve and stop the operatio
38. not sanitary could cause serious health issues B Useafirm stool or ladder when cleaning or maintaining the product Be careful and avoid personal injury B X Replace the all batteries in the remote control with new ones of the same type Do mix old and mew batteries or different types of batteries There is risk of fire or explosion B not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode B Ifthe liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote of the batteries have leaked The chemical in batteries could cause burns or other health hazards 2 Function Model Names of Indoor Outdoor Units CINE NE T T NN DC Inverter MS9A 12HRDN1 BSOW B MS9A 12HRDN1 BSOW B 9 12 18 24 Filter killer of formaldehyde lonizer O lonizer O Silver Ico Filter O Self diag function Vitamin C Filter O Hydrophilic aluminum fin 3M HAM Filter O Anti rust cabinet Bio Filter O Valve protection cover Golden Fin O PTC Heating Belt O 8 degree heating O Compressor Crankcase Heater O
39. p to a torque 18N m Be sure to check the gas leakage 6 7 Re installation while the outdoor unit need to be repaired 1 Evacuation for the whole system Outdoor unit Liquid side 2 way valve 2 TZN Gas side i d Procedure 1 Confirm that both the 2 way 3 way valves are set to the opened position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indicates 0 1 4 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 5 Disconnect the charge hose from the vacuum pump 34 2 Refrigerant charging QA Ind E Indoor unit 7 UA N Liquid side m 5 Outdoor unit x valve AUC Gas side ON Charging cylinder M Electronic scale Procedure 1 Connect the charge hose to the charging cylinder open the 2 way valve and the 3 way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up 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 t
40. r NN TIMER indication lamp Lights up during Timer operation 38 DEFROST indication lamp For cooling amp heating models only Lights up when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating operation DIGITAL DISPLAY Displays the current setting temperature and malfunction protection code when the air conditioner is in operation Frequency display This display is separated into five zones The zones illuminate based on the compressor current frequency For example higher frequency will illuminate more zones 8 3 Main Protection 8 3 1 Three Minutes Delay at restart for compressor 1 minute delay for the 1 time start up and 3 minutes delay for others 8 3 2 Temperature protection of compressor top The unit will stop working when the compressor top temp protector cut off and will restart after the compressor top temp protector restart 8 3 3 Temperature protection of compressor discharge When the compressor discharge temp is getting higher the running frequency will be limited as below rules Compressor discharge temp 15 115 for 5s compressor stops 108 T5 115 C decrease the frequency to the lower level every minutes 90 T5 105 keep running at the current frequency 15 lt 90 no limit for frequency 8 3 4 Fan Speed is out of control When Indoor Fan Speed keeps too low 300RPM for certain time the unit will s
41. r function 8 4 7 1 Timing range is 24 hours 8 4 7 2 Timer on The machine will turn on automatically when reaching the setting time 8 4 7 3 Timer off The machine will turn off automatically when reaching the setting time 8 4 7 4 Timer on off The machine will turn on automatically when reaching the setting time and then turn off automatically when reaching the setting off time 8 4 7 5 Timer off on The machine will turn off automatically when reaching the setting off time and then turn on automatically when reaching the setting on time 8 4 7 6 The timer function will not change the AC current operation mode Suppose AC is off now it will not start up firstly after setting the timer off function And when reaching the setting time the timer LED will be off and the AC running mode has not been changed 8 4 7 7 The setting time is relative time 8 4 8 Sleep function mode 8 4 8 1 Operation time in sleep mode is 7 hours After 7 hours the AC quits this mode and turns off 8 4 8 2 Operation process in sleep mode is as follow When cooling the setting temperature rises 1 C be lower than 30 every one hour 2 hours later the setting temperature stops rising and indoor fan is fixed as low speed When heating the setting temperature decreases 1 C be higher than 17 C every one hour 2 hours later the setting temperature stops rising and indoor fan is fixed as low speed Anti cold wind function has the priority 8
42. r the EEPROM chip plugged in main PCB well Yes Replace the indoor main PCB EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage 99 9 3 2 Indoor outdoor units communication diagnosis and solution E1 Power off then turn on the unit 5 seconds later reconnect the power 1 the error still displaying after several minutes Yes Y Check all the wirings between indoor and outdoor indoor main PCB and outdoor main PCB following the wiring diagram Are all the wirings connected correctly Yes v Measure Vs is it moving alternately between positive value and negative Vs is the voltage between S N of outdoor unit Yes Y Y Is the wiring to the outdoor main PCB connected correctly Yes Y Change the outdoor main PCB Power on Is the error extinguished NO Y Change the indoor main PCB Is the wiring to the indoor main PCB connected correctly Yes Y Change the indoor main PCB Power on Is the error extinguished NO Y Change the outdoor main PCB 60 9 3 3 Zero crossing detection error diagnosis and solution E2 Check if the connections and power supply is normal NO Yes y Indoor main PCB is
43. requency to the lower level Hold Keep the current frequency No limitation for frequency Note When AC is in hold zone for 3 minutes the compressor frequency will rise to the higher level frequency will increase twice at most 8 4 2 2 Outdoor fan running rules T4 4 High 22 9 20 Low 8 4 2 3 Indoor fan running rules In cooling mode indoor fan runs all the time and the speed can be selected as high medium low and auto Auto fan in cooling mode acts as follow 42 TM High Medium 1 5 Low 8 4 2 4 Condenser high temperature T3 protection 55 lt 13 lt 60 the compressor frequency will decrease to the lower level until to F1 and then runs at F1 If 3 lt 54 the compressor will keep running at the current frequency 13 lt 52 the compressor will not limit the frequency and resume to the former frequency 13 gt 60 C for 5 seconds the compressor will stop until T3 52 8 4 2 5 Evaporator low temperature T2 protection 2 lt 0 C the compressor will stop and restart when 2 gt 5 0 2 lt 4 the compressor frequency will be limited and decreased to the lower level 4 lt 2 lt 7 C the compressor will keep the current frequency 2 gt 7 C the compressor frequency will not be limited 43 8 4 3 Heating Mode 8 4 3 1 Compressor running rules The maximum operation frequency of the comp
44. ressor after starting submits to the following rule T4 34 33 28 Fmax F2 27 25 Fmax F3 24 22 19 18 Fmax F5 Fmax F6 16 15 14 Fmax F 12 14 Fmax F8 6 5 9 Fmax F10 If users switch on AC by remote controller the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below 44 H 45 0 44 5 3 5 3 0 2 5 2 0 D 31 5 11 0 40 5 While the zones of are corresponding to different compressor running frequency AT 0 Cas factory setting Note When 1 keeps in the same temp zone for 3 minutes the compressor will run as the below rules A E Increase the frequency to the higher level until to F10 F Keep the current frequency G Decrease the frequency to the lower level until to F1 Run at F1 for 1h if T1 Ts AT gt 6 the compressor will stop Meanwhile the compressor running frequency is limited by the current IZHEAT It HEAT Hold Decrease Decrease running frequency to lower level 45 Off Compressor stops Hold K
45. tdoor temperature lt 15 for 1 hour then the machine stops running the indoor display shows the error code P3 The unit can still receive remote control signals If the outdoor gt 12 for 10 minutes the compressor stops running more than one hour Or the outdoor temperature gt 5 for 10 minutes then AC will recover to the last mode and fan speed EA Heserved function 96 9 2 Outdoor unit error display 2 8 20 120 0 13 2 2008 12 12 The picture of PCB above is only for reference LED 4 is a red light and for the PCB POWER display LED 1 is a yellow light After power on it will be slow flash when the unit is in standby and quick flash 2 5Hz if the unit has some problems LED 6 green and LED5 red are two lights controlled by the compressor drive chip Below is meanings for those lights PM malfunction or IGBT over strong current protection x we 57 voltage or too low voltage protection o 8 voltage or too low voltage protection O light X off 2 5Hz flash 58 9 3 Diagnosis and Solution 9 3 1 EEPROM parameter error diagnosis and solution EO Shut off the power supply and turn it on 5 seconds later 1 it still displaying the error code Yes Y If the EEPROM chip is welded on main PCB replace the main PCB directly Otherwise check Correct the connection whethe
46. top and the LED will display the failure 8 3 5 Inverter module Protection The Inverter module has a protection function about current voltage and temperature If these protections happen the corresponding code will display on indoor unit and the unit will stop working 39 8 3 6 Indoor fan delayed open function When the unit starts up the louver will be active immediately and the indoor fan will open 10s later If the unit runs in heating mode the indoor fan will be also controlled by anti cold wind function 8 3 7 Compressor preheating functions Preheating permitting condition If T4 outdoor ambient temperature lt 3 and the machine connects to power supply newly or if T4 C and compressor has stopped for over hours the compressor heating cable will work Preheating mode A weak current flow through the coil of compressor from the wiring terminal of the compressor then the compressor is heated without operation Preheating release condition If T4 gt 5 C or the compressor starts running the preheating function will stop 8 3 8 Zero crossing detection error protection If AC detects time interval is not correct for continuous 240s the unit will stop and the LED will display the failure The correct zero crossing signal time interval should be between 6 13ms 8 4 Operation Modes and Functions 8 4 1 Fan mode 1 Outdoor fan and compressor stop 2 Temperature setting function is disabled and no setting temp

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