SERVICE MANUAL
Contents
1. Outdoor unit 1 ZA 2 way valve Cassi jA U 0 Gas side EE 0 7 7 zl 3 way valve Open 2 gt ROY il f jy CU Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position 2 Connect the charge set to the 3 way valve s service port Leave the valve on the charge set closed Connect the charge hose with the push pin to the service port 3 Open the valves Low side on the charge set and discharge the refrigerant until the gauge indicates 0 05 to 0 1Mpa If there is no air in the refrigeration cycle the pressure when the air conditioner is not running is higher than 0 1Mpa discharge the refrigerant until the gauge indicates 0 05 to 0 1 Mpa If this is the case it will not be necessary to apply a evacuation Discharge the refrigeration gradually if it is discharged too suddenly the refrigeration oil sill be discharged 16 7 8 Evacuation Indoor uni Liquid side Outdoor unit 23 L 2 valve B ala a 1 7 Gas side 3 way valve Open 4424 4 1 Vacuum pump m HB cu Procedure 1 Connect the vacuum pump to the charge set s centre hose 2 Evacuation for approximately one hour Confirm that the gauge needle has moved toward 0 1 Mpa 76 cmHg vacuum of 4 mmHg or less 3 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge ne2. e aie 26 8 10 Acton of 4 way Valve sutor eee e ute do cuca p ehe 26 8 11 Two speeds outdoor fan fUNC ON eic ai Liri damet en etn ieli taa 26 8 12 Timer functions oii e nter IHE Saeed ein EUR IE Bale an age ved se gore toes 27 8 13 Sleep function modei t dae ted eget e dete ed edt Lee 27 8 14 Auto Restart functiei 27ste tete eren ir te 27 8 15 lonizer ae E dre casa pa ba 27 8 16 Self clean function 27 8 17 Follow me T nctloh ich ret era aa ice 28 9 Troubleshootin a a a denn ainena snaa 29 9 1 Indoor Unit Error Display eire rient a dede nde Ene dete 30 9 2 Diagnosis and Solution 31 9 3 Key parts Checking essiri 34 1 Precaution 1 1 Safety Precaution W To prevent injury to the user or other people and property damage the following instructions must be followed W Incorrect operation due to ignoring instruction will cause harm or damage W Before service unit be sure to read this service manual at first 1 2 Warning Installation W Do not use a defective or underrated circuit breaker Use this appliance on a dedicated circuit
3. Restarting is for approx 3 minutes Indoor fan speed control Turbo wind high med low breeze Two direction air vane The unit will decide the louver direction according to Work voltage 160V 253V Sleep mode auto control Self diag function The fan is turn to low speed cooling heating The unit will be turn off at the seventh hour Anti cold function B o 2 3 Independent dehumidification Brevantrthecoldwird atthe beginning of unit start The function is usually used in rainy days in springtime or damp areas Auto defrost Air flow Direction control The louver can be set at the desired position or swing up and down automatically Auto restart function When the power supply is interrupted and then restore the air conditioners automatically restore The mode can be change by the room temperature the previous function setting Temp Compensation Flexible wiring connection Outdoor unit Power relay control The unit has 3 mins delay between continuously ON OFF operations Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode 4 way valve control It is only operated in the heating operation mode except defrosting operation Anti rust cabinet Made from electrolytic zinc steel sheet and anti rust coated components Valve pr
4. There is risk of fire or electric shock W 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 W Always ground the product There is risk of fire or electric shock Install the panel and the cover of control box securely There is risk of fire of electric shock W Always install a dedicated circuit and breaker Improper wiring or installation may cause fore or electric shock W Use the correctly rated breaker of fuse There is risk of fire or electric shock W Do not modify or extend the power cable There is risk of fire or electric shock W Do not install remove or reinstall the unit by yourself customer There is risk of fire electric shock explosion or injury W 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 condenser and evaporator W For installation always contact the dealer or an Authorized service center There is risk of fire electric shock explosion or injury W Do not 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 in
5. Midea SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL MOUNTED TYPE MSV1 24HRDNI QCOW CONTENTS 1 En 1 131 Safety LE p ren seb Reo Rhetor ORE E Rees 1 EET 1 PRA levier i i EC 4 Sx DIMENSION zt ener CPP EE 6 SAV indoor PEEN 6 MSV1 24HRDN1 QGOW nexo eS Sat ee AI Ree ee p 6 3 2 Outdoor Unit ee le es ee alee ed ee ee ee ee ee 7 MOG1 24HDNIEQGOW tees en du e i ER 7 SPOCHI CATION E EEE EL 8 5 Refrigerant cycle diagram nnn aanmer enne eneen ennen enaneenenseennnansnanenennenennansnannnennnneennennnnanenannnennenennenn 9 6 Wirin IPIE 10 61 Indoor Unit e ER 10 MSVA 24HRDN1 QGCOW ke p hb e pe HD E p HI 10 6 2 Outdoor Unit oce teinte ted DR e wear ee no ee 11 MOG1 24HDN1 QGCOW iei needed dee dedic i dde e ee Hee e e He e dde dede de dede ie 11 7 Installation details iii ii g IA 12 7 1 Wrench torque sheet for installation 2 ccccccecsseeceeessooceeeeteeceescbeneveceteesenuetensbboctedseceneedtncesseoenendvneetyedueatbess 12 7 2 Connectin
6. 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 18 8 Electronic function 8 1 Abbreviation T1 Indoor ambient temperature T2 Pipe temperature of indoor heat exchanger T3 Pipe temperature of outdoor heat exchanger T4 Outdoor ambient temperature 8 2 Display function 8 2 1 Icon explanation on indoor display board fin auto H H A MA Als wl 5 OPERRATION indicator This indicator flashes after power is on and illuminates when the unit is in operation AUTO indicator This indicator illuminates when the air conditioner is in AUTO operation TIMER indicator This indicator illuminates when TIMER is set ON OFF IONIZER CLEAN AIR indication lamp Lights up when CLEAN AIR feature is activated and lonizer can generate abundant anions to fill the room with refreshing and natural air PRE DEF indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode TURBO indication lamp Lights up when select TURBO function on cooling operation or on heating operation FREQUENCY indicator This indicator appears only when the compressor is in operation and indicates the current operating frequency TEMPERATURE indicator Usually it displays the temperature settings When change the setting temperature this indicator
7. begins to flash and stops 20 seconds later It displays the room temperature when the air conditioner is in FAN only operation When the unit stops operation it returns to original factory settings The temperature indicator area will display SC when the self clean function is started It also displays the malfunction code or protection code 19 FAN SPEED indication lamp Displays the selected fan speed AUTO nothing and three fan speed levels LOW MED and HIGH 8 2 2 LED display control function Pressing LED display button on remote controller will turn off all displays on indoor unit while pressing once again all displays will resume 8 3 Protection 8 3 1 Three Minutes Delay at restart for compressor 8 3 2 Temperature protection of compressor top 8 3 3 If the temperature of compressor top is too high higher than 115 C and the Over load Protector is cut the units stop When the Over load Protector restore and close lower than 100 C the compressor will restart in this case the compressor is restricted by Three Minutes Delay protection 8 3 4 Temperature protection of compressor exhaust If the exhaust temp of compressor is higher than 115 C and lasts for 5 seconds the compressor stops and does not resume until the exhaust temp is lower than 90 C 8 3 5 Inverter module Protection Inverter module Protection itself has a protection function against current voltage and temperature If these protections happened
8. mode 8 4 3 The action of auto fan in fan only mode is the same as auto fan in cooling mode with 24 C setting temperature 1 24 20 8 5 Cooling Mode 8 5 1 After starting the operation frequency of compressor submits to following rule room temp setting Temp AT When the machine is running and AT room temp setting temp changes the frequency of compressor will rise or descend a grade 7 minutes after starting After start if AT stays in a zone for 3 minutes the frequency will change as follow Zone Current frequency rise a grade till the maximum grade Zone B Elevate or keep or descend the frequency of compressor Zone H Compressor stops after running as the minimum frequency for 60 minutes or AT is less than 2 C 8 5 2 Indoor heat exchanger anti freezing function If T2 is lower than 0 C the compressor stops and resumes when 2 gt 5 8 5 3 Outdoor unit current control in cooling mode refer to the parameter table comp pause I3COOL freq descends if curr rises I2COOL freq remains if curr descends outdoor unit current MCOOL running normally Remark COOL I2COOL I3COOL MSV1 24HRDN1 QCO w 11A 12A 13A 8 5 4 Rating capacity test function 1 Set the indoor unit with remote controller as high fan 17 in cooling mode then press TURBO button on controller 6 times or more within 10 seconds make sure indoor unit receives these signals
9. the machine will turn into rating capacity test mode the buzzer will make a di sound for 2 seconds continuously Also indoor fan will change to rating speed the frequency of compressor will be fixed as rating value Any condition of above is not satisfied the machine can not be turned into rating capacity test mode 2 The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature 8 5 5 Turbo function press the TURBO button on remote controller 1 Elevate current frequency to a higher grade 2 Indoor fan turns to turbo speed 21 3 After running for 30 minutes the machine will turn back to previous setting mode 8 5 6 Indoor fan operation rule 1 cooling mode indoor fan runs all the time and the speed can be selected as high medium low and auto 2 Auto fan in cooling mode acts as follow 4 0 4 3 0 medium 1 5 1 0 oom temp setting Temp AT 8 5 7 Condenser high temperature protection function in cooling and drying mode If T3 gt 60 C for 5 seconds compressor will stop immediately and the machine will not resume until T3 lt 52 C 8 6 Drying mode 8 6 1 Indoor fan speed is fixed at breeze grade and can t be changed The horizontal angle is the same as in cooling mode 8 6 2 Room overlow temperature protection In drying mode if room temperature is lower than 10 C compressor will stop and not resume un
10. when installing the product To avoid vibration of water leakage W Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem for your neighbors W Use two or more people to lift and transport the product Avoid personal injury W Do not install the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the product Corrosion particularly on the condenser and evaporator fins could cause product malfunction or inefficient operation gt Operational Do not expose the skin directly to cool air for long periods of time Do not sit in the draft This could harm to your health 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 Do not block the inlet or outlet of air flow It may cause product failure m 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 W Do not touch the metal parts of the product when removing the air filter They are very sharp There is risk of personal injury W Do not step on pr put anything on the product outdoor units There is risk of personal injury and failure of product Always insert the filter securely Clean the fi
11. Capacitors HIGH VOLTAGE CAUTION Bulb 25 40W 29 9 1 Indoor Unit Error Display Display LED STATUS EO EEPROM parameter error E1 Indoor outdoor units communication protection E2 Zero crossing signal error E3 Fan speed out of control E5 Open or short circuit of outdoor temperature sensor E6 Open or short circuit of room or evaporator temperature sensor PO IGBT over strong current protection P1 Over voltage or too low voltage protection P2 Temperature protection of compressor top P4 Inverter compressor drive error Note E4 amp P3 Reserved function 30 9 2 Diagnosis and Solution 9 2 1 parameter error error diagnosis and solution Circuit or software error on indoor PCB Replace indoor PCB 9 2 2 E1 indoor outdoor units communication protection error diagnosis and solution Disconnect the power supply after 1 minute connect the power supply turn on the unit with remote controller Does the unit work normally NO Check the wiring between indoor and outdoor unit Is the connection of L N S and GND good Is the GND connection on outdoor PCB good NO gt Reconnect and retest again Yes Is the LED4 red on outdoor PCB bright and LED 1 vellow blinking Replace indoor PCB and repower on Is the failure cleared No The power supply for outdoor PCB is fail Check the wiring
12. ches the setting off time in sleep mode 8 14 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 restores the setting conditions before the power failure The unit will resume the previous operation setting including Mode Fan speed Temperature ON OFF automatically after 3 minutes when power returns 8 15 lonizer Clean Air function 1 Clean Air function is available only when the aircon is on and it s controlled through remote controller 2 After the Aircon being turned the Clean Air function is switched on when the aircon receives FRESH CODE at first time and ionizer is switched off when the aircon receives the CODE again It s a circle 3 After starting the Clean Air function the ionizer can work only when the indoor fan motor is running If the indoor fan motor is off the ionizer also stops working even though the Clean Air function is available 4 Switching the running mode will not stop the ionizer When turning off the aircon the ionizer is also turned off 8 16 Self clean function 1 Self clean function is chosen through wire jumper J2 in indoor PCB it s available when the unit has detected that J2 is on after getting through the power 2 Self Clean function is available only at cooling including auto cooling and turbo and drying mode when the user press down the button Self Clea
13. edle does not move approximately 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil if the vacuum pump oil becomes dirty or depleted replenish as needle 17 7 9 Gas charging Indoor unit NN Liquid side Outdoor unit valve Gas side Check valve Charging cylinder Procedure 1 Connect the charge hose to the charging cylinder Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder 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 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 if can be charged with a little at a time approximately 150g each timeO while operating the air conditioner the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure pumping down pin 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the refrigerant to be discharged If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 5 Mounted the valve stem caps
14. g the cableS 50 onte tegi Rx PER ke ineo SE 12 753 Pipe length and elevation ei en 12 7 4 Air purging of the piping and indoor 12 7 5 Pumping down Re installation 22 31 detest 14 7 6 Re air purging Re installation tiec er Fa 15 7 7 Balance refrigerant of the 2 way 3 way 16 TB Evacuatioris cede dee eene ERR RUN ERE irr 17 139 GAS REEL A keek 18 8 Electronic function gs 19 8 1 Abbreviationii ii c en se a a de eee ht 19 9 2 Displav function e La ii i uten it 19 9 9 Protection iet e e iq A e 20 8 4 B ete 20 moerore ego 21 9 6 Drying mode oeste 22 8 7 Bleatirig mode E ete Por desde desee tabou eet 22 8 8 AUTO mode function sueann eed perte segre ea nattere de dete Vd para TED epe Ae 26 8 9 Forced operation f riction uiri e Fee Hee e Ree Ye pee
15. he PCB will control the unit according to the temperature from follow me signal and the temperature collection function of room temperature sensor will be shielded but the error detective function of room temperature sensor will be still valid 3 When the follow me function is available the PCB will control the unit according to the room temperature from the remote controller and the setting temperature and the action of compressor is as following At cooling mode if TA lt TS compressor is off If TAZTS compressor is on At heating mode if TA TS compressor is off If TASTS compressor is on 4 The PCB will take action to the mode change information from remote controller signal but it will not affected by the setting temperature 5 When the unit is running with follow me function if the PCB doesn t receive any signal from remote controller for 7 minutes or pressing FOLLOW ME button again the follow me function will be turned off automatically and the temperature collection function of room temperature sensor will be available the PCB will control the unit according to the room temperature detected from its own room temperature sensor and setting temperature 28 9 Troubleshooting Safety Because of there are capacitors in PCB and relative circuit in outdoor unit even shut down the power supply electricity power still are kept in capacitors do not forget to discharge the electricity power in capacitor TE Electrolytic
16. hree seconds and then wait for one minute 5 Use torque wrench to tighten the service port cap to a torque of 1 8 kgf m 18N m 6 Set the 3 way valve to the opened position 7 Mounted the valve stem nuts to the 2 way and 3 way valves 8 Check for gas leakage At this time especially check for gas leakage from the 2 way and 3 way stem nuts and from the service port 13 7 5 Pumping down Re installation indoor UN 4 2 aN Gas side 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 hexagonal wrench to operate the valve stems 2 Operate the unit for 10 to 15 minutes 3 Stop operation and wait for 3 minutes then connect the charge set to the service port of the 3 way valve Connect the charge hose with the push pin to the gas service port Air purging of the charge hose Open the low pressure valve on the charge set slightly to purge air from the charge hose 6 Set the 2 way valve to the close position 7 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 8 Immediately set the 3 way valve to the closed position Do this quickly so that the gauge ends up indicating 0 3 to 0 5Mpa Disconnect the charge set and amount the 2 way and 3 way valve s stem
17. jury W Do notlet 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 Take care to ensure that power cable could not be pulled out or damaged during operation There is risk of fire or electric shock Do not place anything on the power cable There is risk of fire or electric shock Do not plug or unplug the power supply plug during operation There is risk of fire or electric shock W Do not touch operation the product with wet hands There is risk of fire or electric shock W Do not place a heater or other appliance near the power cable There is risk of fire and electric shock W Do notallow water to run into electric parts It may cause fire failure of the product or electric shock W Do not store or use flammable gas or combustible near the product There is risk of fire or failure of product W Do not use the product in a tightly closed space for a long time Oxygen deficiency could occur m 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 There is risk of explosion or fire If 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 Stop operation and close the window storm or h
18. lter every two weeks or more often if necessary A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage Do not insert 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 m Do not drink the water drained from the product It is not sanitary could cause serious health issues Use a firm stool or ladder when cleaning or maintaining the product Be careful and avoid personal injury m Replace the all batteries in the remote control with new ones of the same type Do not mix old and mew batteries or different types of batteries There is risk of fire or explosion W Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode m If the liquid from the batteries gets onto your skin or clothes wash it well with clean The chemical in batteries could cause burns or other Do not use the remote of the batteries have health hazards leaked 2 Function Operation by coniroller Sensing by room temperature Room temperature sensor Pipe temperature sensor Room temperature control Maintain the room temperature in accordance with the setting temperature Anti freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control
19. n on remote controller the Self Clean icon LCD screen of indoor unit will keep 27 bright After running for 13 minutes in low fan mode the unit turns into low heating mode anti cold wind function is not valid when the unit keeps low heating mode for 1 min or evaporator high temp protection occur it stops and turns into low fan mode and keeps running for 2 minutes then quits from Self Clean function and turns off 3 When setting the Self Clean function the unit has been in Timer or Turbo function the Timer or Turbo function will be cancelled and then execute Self Clean function 4 When the unit is running Self Clean function all functions are not available except swing air direction clean air LED display and only receiving Self Clean code again or turn off code the unit can quit from the function 5 When the unit is running Self Clean function all protection functions are valid 8 17 Follow me function 1 Follow me function is chosen through wire jumper J1 in indoor PCB it s available when the unit has detected that J1 is on after getting through the power 2 indoor PCB receives the signal which results from pressing the FOLLOW ME button on remote controller the buzzer will emit a sound and this indicates the follow me function is initiated But when the indoor PCB receives signal which sent from remote controller every 3 minutes the buzzer will not respond When the unit is running with follow me function t
20. nuts and service port caps Use a torque wrench to tighten the service port cap to a torque of 1 8 kgf m Be sure to check for gas leakage 14 7 6 Re air purging Re installation NN Liquid side Outdoor unit 2 way valve DUE E 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 to on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant 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 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 15 7 7 Balance refrigerant of the 2 way 3 way valves Indoor unit Zo Liquid side
21. on outdoor PCB comparing with wiring plate Is the connection good No Replace outdoor e box Correct the connection 9 2 3 E2 zero crossing signal error diagnosis and solution 15 power supply and connection of connectors good Be sure the power supply is good and correct the connection Indoor PCB is defective Replace the indoor PCB 31 9 2 4 E3 indoor fan speed out of control diagnosis and solution Is the indoor fan motor Repair th t d connector and connection Spar TO ee good reconnec Is voltage being applied to Indoor PCB is defective Replace the indoor PCB mid pin and N on CN1 the fan motor Replace the indoor fan motor rang 90v 160v between 9 2 5 Eb5 Open or short circuit of outdoor temperature sensor diagnosis and solution Is the outdoor temperature sensor connector and connection good Replace the Sensor and Replace outdoor e box check if E5 display again 9 2 6 E6 open or short circuit of room or evaporator temperature sensor diagnosis and solution Repair the connector and reconnect Is the indoor temperature and evaporator sensor Repair the connector and connector and connection reconnect good Replace the sensor and Replace the indoor PCB check if E6 display again 9 2 7 PO IGBT over strong current protection diagnosis and solution Is all connections on PCB l and between PCB and Repair or c
22. orced auto mode is the same as normal auto mode which temperature is 24 C 8 10 Action of 4 way valve In cooling drying fan only or turning off mode 4 way valve is off while in heating mode 4 way valve is on If the machine changes operation mode from heating mode to some other mode 4 way valve will be delayed off 2 minutes after compressor stop For defrosting please refer to the passage defrosting mode 811 Two speeds outdoor fan function 8 11 1 Outdoor fan starts at the same time with compressor but stops 30 seconds later after compressor stop 8 11 2 Outdoor fan action in heating mode including heating in auto mode S S a o 5 5 2 5 5 5 5 o o 5 5 5 5 Outdoor fan action in heating mode Outdoor fan action in cooling amp drying mode including heating in auto mode including cooling in auto amp forced mode 8 11 3 Outdoor fan action in cooling amp drying mode including cooling in auto amp forced mode Please refer to the pic above 26 8 12 Timer function 8 12 1 Timing range is 24 hours and the minimum resolution is 15 minutes 8 12 2 After turning off the machine will turn on automatically when reaching the setting time 8 12 3 Timer After turning on the machine will turn off automatically when reaching the setting time 8 12 4 Timer on off After turning off the machine will turn on automa
23. orrect the compressor good connector or connection Replace the outdoor PCB and then repower on Is Check the compressor the failure cleared 32 9 2 8 P1 over voltage or too low voltage protection diagnosis and solution Is the power supply good Be sure the power supply is normal when using the units Replace the outdoor e box 9 2 9 P2 temperature protection of compressor top diagnosis and solution Does compressor operate Is refrigerant circulation volume normal Is the connection good Reconnect and retest Is protector normal Replace the protector Check the outdoor main PCB Is there some problem Charge refrigerant Is abnormality Replace the outdoor PCB the same after gas charging Check refrigerant system such as clogging of capillary etc 9 2 10 P4 inverter compressor drive error diagnosis and solution O NES Reconnect and retry Is the connection of compressor good Is the wiring sequence right The voltage range proper Replace the outdoor E box If the problem comes to again check coil resistance of inverter compressor is it 0 4520hm Replace inverter compressor 33 9 3 Key parts checking 9 3 1 Compressor checking Model C 6RZ146H1A Measure the resistance value of each winding by using the multi meter Input Terminal Blue Resi
24. otection cover It protects the valves and prevents water from dripping Discharge pipe temperature protect Driving heating at 15 C 3 Dimension 31 Indoor Unit MSV1 24HRDN1 QCOW 3 2 Outdoor Unit MOG1 24HDN1 QCOW 4 Specification Indoor MSV1 24HRDN1 QCO Outdoor MOG1 24HDN1 QCOW Power supply Ph V Hz 1 220 240V 50Hz Capacity Btu h 23000 12000 24000 Cooling Input W 2250 840 2350 Rated current A 9 8 3 6 10 2 EER Btu w h w w 10 3 3 01 Capacity Btu h 25000 11000 26000 Heating Input W 2150 720 2720 Rated current A 9 4 3 2 11 8 COP W W 3 41 Moisture Removal L h 2 4 Max input consumption 2700 Max current A 15 Starting current A 14 5 Model C 6RZ146H1A Type Rotary Brand SANYO Capacity Btu h 21905 Compressor Input wW 1630 Rated current RLA A 8 38 Locked rotor Amp LRA A 12 5 Thermal protector 1NT11L 3979 Capacitor uF No Refrigerant oil ml 350 Model YDK36 4C Brand Welling Indoor fan motor Input 72 65 58 Capacitor uF 3 Speed hi mi lo r min 1260 1210 1120 Indoor air flow Hi Mi Lo m3 h 1150 1080 960 Indoor noise level Hi Mi Lo dB A 47 44 40 Dimension W H D mm 1080 320 200 Indoor unit Packing W H D mm 1180 425 310 Net Gross weight Kg 14 5 20 Model YDK53 6N Brand Welling Outdoo
25. pressor stops after running with F1 for 60 minutes or when ATh gt 6 C 8 7 4 Outdoor unit current control in heating mode comp pause freq descends if curr rises I2HEAT freq remains if curr descends outdoor unit current MHEAT 4 running normally Remark MSV1 24HRDN1 QCO w 11A 12A 13A 8 7 5 Indoor heat exchanger high temperature protection If T2 gt 60 C the compressor will stop and not resume until T2 lt 48 C 23 8 7 6 Defrosting mode 1 Condition of defrosting Condition 1 If T4 gt 0 C When the units are running if the following two items are satisfied the units start defrosting units runs with T3 lt 3 C for 40 minutes and keeps lower than 6 C for more than 3 minutes b The units runs with T3 lt 3 C for 80 minutes and keeps lower than 4 C for more than 3 minutes Condition 2 If TA O C The program judges according to the condition 1 if the two items are satisfied then judges if T2 has descended for more than 5 C if it has the machine starts defrosting or continues to judge T2 and will not defrost until T2 drops more than 5 C Condition 3 No matter what value T4 is if the machine runs with T3 3 C for more than 120 minutes and T3 keeps lower than 2 C for more than 3 minutes the machine will defrost no matter if T2 drops for more than 5 C or not 2 Condition of ending defrosting If any one of following items is satisfied defrosting
26. r fan motor Input 144 102 Capacitor uF 2 5 Speed r min 780 600 Outdoor air flow m3 h 3000 2200 Outdoor noise level dB A 58 Dimension W H D mm 895 860 330 Outdoor unit Packing W H D mm 1043 915 395 Net Gross weight Kg 64 70 Refrigerant type R410A g 2240 Liquid side Gas side mm inch 9 52 16 0 Refrigerant piping Max refrigerant pipe length m 25 Max difference in level m 10 Operation temp 17 30 Ambient temp 15 50 The above design and specifications are subject to change without prior notice for product improvement 5 Refrigerant cycle diagram ONILV3H SNIIOOO AJUQ Jepoj y 3NT1VA H3SN3QNOO 3ONVHOX3 1V3H JANL Adv Tlldvo epo FATWA 4293H9 0 HOOGLNO 305 dinon HOLVHOdVA3 JIONVHOXA LINN HOOQNI 6 Wiring diagram 61 Indoor Unit MSV1 24HRDN1 QCOW WIRING DIAGRAM INDOOR UNIT SWING MOTOR NON SWITCH BOARD ID ID LOENERATOR ID CONTROL AIR Ye Far IN LET LOWER 9 i CUN 5 565 FAN CAPACITOR BOARD cii Clea eat MAIN BOARD a t N m wo 5 DISPLAY BOARD RED WHITE 2 Lg AE e TRANSFORMER SHAY TERMINAL 1elelele INDOOR UNIT YOSNAS XOLVIOAVA NOTES 10 OUTDOOR UNIT 1 The Color Of Power Supply Cord L N E Measures Up To The IEC Standards BROWN Y G Or The UL Standa
27. rds BLACK WHITE GREEN 2 The Functions In The Rectangle Are Available For Particular Air condition 10 6 2 Outdoor Unit MOG1 24HDN1 QCOW 1 E p zo EONS N i dex a Sata pe Pod cupi s i DISCHARGE SENSOR 1 1 1 1 OUTDOOR 1 MAIN BROWN BLUE 1 VIG BED MET t i e vi BLUE COMPRESSOR i l 1 4 l GND LE N 58 A TO INDOOR UNIT POWER SUPPLY LI 1 4 OUTDOOR l 1 FAN 1 1 E 2 HELLOW TREACTOR2 R6025 H ORANGE i jik 3 REACTORT R1815 4 RED SINE RED ORANGE 1 1 VELLOW REACTOR3 1502 OUTDOOR WIRING DIAGRAM 1 7 Installation details 7 1 Wrench torque sheet for installation Outside diameter 7 2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet Grade 7 3 Pipe length and the elevation Pipe size Standard Max Additional Capacity Btu h Liquid B g m id Elevation refrigerant Indoor unit Indoor unit B Outdoor unit Caution Capacitv is base on standard length and maximum allowance length is base of reliabilitv Oil trap should be installed per 5 7 meters 7 4 Air purging of the piping and indoor unit Required tools Hexagonal wrench adjustable wrench torque w
28. renches wrench to hold the joints and gas leak detector Note The air in the indoor unit and in the piping must be purged If air remains in the refrigeration piping it will affect the compressor reduce the cooling capacity and could lead to a malfunction of unit Be sure using a torque wrench to tighten the service port cap after using the service port so that it prevents the gas 12 leakage from the refrigeration cycle Indoor unit ZN Liquid side Outdoor unit 2 valve Procedure Caution 1 Recheck the piping connections If gas leakage is discovered in step 3 above take the 2 Open the valve stem of the 2 way valve following measures counterclockwise approximately 90 wait 10 If the leaks stop when the piping connections are seconds and then set it to closed position tightened further continue working from step 4 Be sure to use a hexagonal wrench to operate the If the gas leaks do not stop when the connections are valve stem retightened repair the location of the leak discharge all 3 Check for gas leakage of the gas through the service port and then recharge Check the flare connection for gas leakage with the specified amount of gas from a gas cylinder 4 Purge the air from the system Set the 2 way valve to the open position and remove the cap from the 3 way valve s service port Using the hexagonal wrench to press the valve core pin discharge for t
29. stance Value Blug 4 0 4520 Red 259 Black Black 3 Red ES 9 3 2 Outdoor Fan Motor Model YDK53 6N Measure the resistance value of each winding by using the multi meter Input Terminal Meek 7 Blue Black Red 1130 20 C Red Red Yellow 193Q 20 C 34 9 3 4 Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor exhaust temp Te sensor Measure the resistance value of each winding by using the multi meter Some frequently used data for T1 T2 and T4 sensor ETC 8 Some frequently used R T data for Te sensor emoe s s 9 ja Resano vane mne osx we ve er 5 35
30. the corresponding code will display on indoor unit LED 8 3 6 Sensor protection at open circuit and breaking disconnection 8 3 7 Fan Speed is out of control When Indoor Fan Speed is too low lower than 300RPM for 60 seconds the unit stops and LED displays failure information and can t return to normal operation automatically 8 3 8 Cross Zero signal error warning If there are 20 alternations of Cross Zero signals are incorrect the unit stops and LED displays failure information After resuming the motor rotates again The spacing of Cross Zero signal is 6 13ms 8 3 9 Indoor fan delayed open function 8 3 10 For all modes when the units are turned on the indoor fan can operate 10 seconds after the action of louver 8 3 11 Compressor preheating function 1 permitting condition If T4 outdoor ambient temperature lt 3 C and the machine connects to power supply newly or if T4 lt 3 C and compressor has stopped for over 3 hours the compressor heating cable will work 2 Preheating mode A weak current flows through the coil of compressor from the wiring terminal of compressor then the compressor is heated without operation 3 Preheating release condition If T4 gt 5 C or user turns on the machine and compressor runs preheating function will stop 8 4 Fan Only Mode 8 4 1 Temperature setting function is disabled and no setting temperature display 8 4 2 In this mode the action of louver is the same as in cooling
31. tically when reaching the setting time and then turn off automatically when reaching the setting off time 8 12 5 Timer off on After turning the machine will turn off automatically when reaching the setting off time and then turn on automatically when reaching the setting time 8 12 6 The tolerance of Timer is 1 minute per hour 8 13 Sleep function mode 8 13 1 Operation time in sleep mode is 7 hours After 7 hours the machine quits this mode and turns off 8 13 2 In cooling heating or auto mode sleep function is available 8 13 3 Operation process in sleep mode is as follow 1 After pressing ECONOMIC SLEEP button on controller the machine will turn into sleep mode 2 When cooling the setting temperature rises 1 C be lower than 30 C every one hour 2 hour later the rising stops and indoor fan is fixed as low speed 3 When heating the setting temperature descends 1 C be lower than 30 C every one hour 2 hour later the descending stops and indoor fan is fixed as low speed and anti cold wind is available 8 13 4 If user uses timer on function in sleep mode sleep function will pause and not resume until reaches the setting on time 8 13 5 When user uses timer off function in sleep mode or sleep function in timer off mode if the timing time is less than 7 hours sleep function will be cancelled when reaching the setting time If the timing time is more than 7 hours the machine will not stop until rea
32. til room temperature climbs up to 12 C 8 6 3 Evaporator anti freezing protection condenser high temperature protection and outdoor unit frequency limit are valid and they are the same as that in cooling mode 8 6 4 Horizontal louver action is the same as that in cooling mode 8 7 Heating mode 8 7 1 Indoor fan action 1 Anti cold wind function 44 38 37 setting fan speed 34 33 Evaporator temp At fan stop 2 If the compressor stops caused by room temperature rising indoor fan will be forced to run 127 seconds with breeze During this period anti cold wind is disabled After this anti cold wind function is available 3 f the machine runs in rating capacity test mode indoor fan runs with rating speed and 22 anti cold wind is disabled 8 7 2 Indoor fan speed can be set as high medium low or auto grade but anti cold wind function is preferential Auto fan action in heating mode medium oom temp setting Temp AT 8 7 3 After starting the operation frequency of compressor submits to following rule room temp setting Temp ATcon ATh Remark can be changed among 0 2 4 C the default is 0 C When the machine runs if ATh stays in a zone for 3 minutes action of frequency is as follow Zone A Elevate current frequency one grade and not stop until the maximum grade Zone B Elevate or keep or descend current frequency Zone H Com
33. urricane If possible remove the product from the window before the hurricane arrives There is risk of property damage failure of product or electric shock W Do not 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 W When the product is soaked flooded or submerged contact an Authorized service center There is risk of fire or electric shock Be caution that water could not enter the product There is risk of fire electric shock or product damage W Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock W Turn the main power off when cleaning or maintaining the product There is risk of electric shock W 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 W Take care to ensure that nobody could step on or fall onto the outdoor unit This could result in personal injury and product damage gt CAUTION W Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product W Install the drain hose to ensure that water is drained away properly A bad connection may cause water leakage W Keep level even
34. will finish and the machine will turn to normal heating mode a T3rises to be higher than 12 C b T3 rises to be higher than 8 C and remains for 80 seconds c The machine has run for 10 minutes in defrosting 8 7 7 X Defrosting action compressor 4 way valve outdoor fan indoor fan indoor fan breeze 10s gt lt 905 4 gt 1005 i no longer than 10 minutes 22 30s 8 7 8 Rating capacity test function 1 Set the indoor unit with remote controller as high fan 30 C in heating mode then press TURBO 24 button on controller 6 times or more within 10 seconds make sure indoor unit receives these signals the machine will turn into rating capacity test mode the buzzer will make di sound for 2 seconds continuously Also indoor fan will change to rating speed the frequency of compressor will be fixed as rating value Any condition of above is not satisfied the machine can not be turned into rating capacity test mode 2 machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature 8 7 9 Turbo function in heating mode Elevate current frequency excluding F8 to a higher grade If indoor fan is in low speed or pause caused by defrosting or anti cold wind function frequency of compressor will not be elevated one grade until these limit has been released 1 Indoor fan changes to turbo speed and anti cold
35. wind function is valid 2 After running for 30 minutes the machine will turn back to previous setting mode 25 8 8 Auto mode function 8 8 1 This mode 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 AT T1 Ts 8 8 2 Indoor fan will choose auto speed of relevant mode 8 8 3 If the machine switches mode between heating and cooling compressor will keep stopping for 15 minutes and then rechoose mode according to AT 8 8 4 setting temperature is modified the machine will rechoose running function 8 9 Forced operation function 8 9 1 Forced cooling and auto function can carry out with a touch button In these two modes the machine can be changed by remote controller to any other mode at any moment 8 9 2 When the machine is off pressing the touch button will carry the machine to forced auto mode after this if 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 machine In forced operaton remote control is available 8 8 3 In forced operation mode all general protections is available 8 8 4 In forced cooling mode after running for 30 minutes the machine will turn to normal auto mode which setting temperature is 24 C 8 8 5 The action of f
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