Service Manual
Contents
1. 30 6 6 Re installation while the indoor unit need to be 31 6 7 Re installation while the outdoor unit need to be 33 RM 35 TUNCUON reme utc 36 O ADDI SVIAUON 36 8 2 BITS be CT np 36 TOIGCHOE 37 8 4 Operation Modes and Functions cccc cece eeceeecceecseeeeeeeeeeseeesseeeseteeeeeeeseeeeeeseeeseeesetseetaeeneetans 37 9 TEOUDICSMOOUIN Gi teva 49 OT AY 49 9 2 Diagnosis and Solution ns AAE E mained 50 1 Precaution 1 1 Safety Precaution B To 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 Do not use a defective or underrated circuit breaker Use this appliance on a dedicated circuit Th2. TOYOTOMI b service Manual MODEL MTN MTG A128FS MTN MTG A135FS 5 1 PRO CA UO NR 1 T2T afely oe Rai saat tended ual 1 1 iji hte aaa M 6 3 DIMENSION iocus cese t ose Puta oe rec Sosa ub uf 9 S GOON UNIS 3 222 T C rE T MUESMM 9 I POCOO EM T HT 11 4 Refrigerant Cycle Diagram 12 5 WINO Diagrams 13 Ndoo UNIE aeaa a M 13 2 OGOF UNI a 17 Installatiori delallS siasi e a eaa su aav av cuv coda Ceu aae aa aaa 25 6 1 Wrench torque sheet for installation nn 25 6 2 Cohnec rig MING cables MOS uM se a NUM UI LM eo 25 6 3 Pipe length and the 2242514 26 6 4 Installation for the first 27 6 5 Adding refrigerant after running the system for many
3. 8 3 1 Time Delay at restart for compressor 8 3 2 Fan Speed is out of control When Indoor Fan Speed keeps too low or too high for certain time the unit will stop and the LED will display the failure 8 3 3 Current protection 4 ISSEC B ISMIN C IFAN IRESTORE Resume A zone The current exceeds lIssec for 5 seconds 3 seconds for 21k model the compressor and outdoor fan will shut off B zone The current exceeds Ismin for 5 minutes the compressor and outdoor fan will shut off C zone The current exceeds Iran the outdoor fan will shut off if AC is in heating mode If AC is in cooling mode the indoor fan will run at low speed 128 5 p os f e 8 3 4 Zero crossing detection error protection 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 temperature is displayed 3 Indoor fan can be set to high med low auto 4 The louver operates same as in cooling mode 37 TTC 29 28 25 medium 38 8 4 2 Cooling Mode 8 4 2 1 Compressor running rules Once the compressor starts up it will follow the below rules When indoor room temp T1 is lower than Tn the compressor and outdoor fan will shut off When T1 is higher than Tm the compressor and outdoor fan will start up T1 Tm Tn Tm Ts 1 Tn Ts Tm Ts Tn Ts 2 8 4 2 2 Outdoor fan running r
4. 17 C 32 C 221000Btu h models 11 43 C 18 43 21000Btu h models ple 18 43 Outdoor temperature For the models with 221000Btu h models low temperature cooling system 21 C 52 C 21 C 52 C For special tropical models For special tropical models CAUTION 1 If air conditioner is used beyond the above conditions the certain protections may action 2 Room relative humidity should be less than 80 If the air conditioner operates in excess of this value the surface of the air conditioner may attract condensation water In this case please set the vertical air louver to its maximum angle vertically to the floor and set the fan to high speed 35 8 Electronic function 8 1 Abbreviation T1 T2 s T4 5 Indoor ambient temperature Coil temperature of indoor heat exchanger Coil temperature of outdoor heat exchanger Outdoor ambient temperature Compressor discharge temperature 8 2 Display function 8 2 1 Icon explanation on indoor display board Auto indicator This indicator illuminates when the air conditioner is in AUTO operation PRE DEF Indicator only for heat pump models This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode OPERATION indicator This indicator illuminates when the air conditioner is running 36 8 3 Main Protection
5. being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Indoor fan speed control Turbo high med low breeze Sleep mode auto control Independent dehumidification The function is usually used in rainy days in springtime or damp areas Air flow Direction control The louver can be set at the desired position or swing up and down automatically Auto mode The mode can be change by the room temperature Timer function Self diag function Auto restart function Flexible wiring connection Outdoor units Power relay control Low noise air flow system Anti rust cabinet Made from electrolytic zinc steel sheet and anti rust coated components Valve protection cover It protects the valves and prevents water from dripping 3 Dimension 3 1 Indoor Units Figure 1 e 2 150mm or more to ceiling Indoor unit outline Installation plate 120mm or 120mm or more to wall Fd b to wall PENA Left rear side Right rear side refrigerant refrigerant pipe hole 65 hole 65 1 150mm or more to ceiling Indoor unit outline Installation plate NE 120mm or 120mm or more to walll more to ce LAS uum KS Left rear side SS Right id ight rear side refrigerant c c AUS retrigerant ole 465 790 hole 65 3 2 Outdoor Units More t
6. is satisfied the defrosting will terminate and the machine will turn to normal heating mode 42 1 The defrosting time is reached to the setting value 2 The compressor current reaches or exceeds Iperrost for 7 seconds IDEEROST 6 5A for MTN A128EFS model e Defrosting action Compressor 4 way valve Outdoor fan Indoor fan About the setting defrosting time 1 Condition 1 of defrosting If case B happens before case A and lasts till case A happens the setting defrosting time is 10 minutes Otherwise the defrosting time is 7 5 minutes 2 Condition 2 of defrosting The defrosting time is 10 minutes 3 No matter what condition of defrosting is if the defrosting time keeps 7 5 minutes for 3 times it will be 10 minutes in the 4 defrosting 2 Condition of ending defrosting If any one of the following items is satisfied the defrosting will terminate and the machine will turn to normal heating mode 1 T3 rises to be higher than TC2 TC2 20 21k model 2 The machine has run for 10 minutes in defrosting 43 3 Defrosting action Setting defrosting time Compressor 4 way valve Outdoor fan Fan speed z x 2 1 Note High If indoor fan is in high speed and T2 T1 THperrost start defrosting If indoor fan is in medium speed and T2 T1 start defrosting Low lt TLpegrnosr lf indoor fan is in low speed and T2 T1 TLpe
7. minutes and check whether the compound meter indicates 0 1Mpa If 2f the meter does not 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 operation 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 7seconds 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 cdi Outdoor unit Pu N m X 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 tigh
8. 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 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 X Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock B 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 X Take care 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 Keep level even when instal
9. 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 29 6 When the electronic scale displays the proper weight refer to the table disconnect the charge hose from the 3 way valve s service port immediately and turn off the air conditioner 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 LE e T J Til B Furl n Er Check valve T E i s Charging cylinder Ld Ed 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 Ope
10. 00 2600 69 52 3 8 255kgf cm 265kgf cm 3500 3600 012 7 1 2 357kgf cm 367kgf cm 4500 4700 16 5 8 459kgf cm 479kgf cm 6 2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet Rated current of appliance Nominal cross sectional area gt 10 and lt 16 gt 16 and x25 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 Please refer to the nameplate before selecting the cable fuse and switch 25 6 3 Pipe length and the elevation The pipe length and refrigerant amount Additional amount of Model Connective pipe length Air purging refrigerant 9k 12k More than 5m Pipe length 5 x 20g m Standard Max length Elevation m B m Indoor unit Indoor unit Oil trap L Outdoor unit Outdoor unit Caution Capacity test is based on standard length and maximum allowance length is based on system reliability Cil trap should be installed per 3 5 meters 26 6 4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below e 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 refri
11. CONDITIONER WOTE DISPLAY BOARD Fam The wiring diagram is for explanation purpose only The actual shape of the components may be different 2 5ywmbol 1 indicates optional components 3 The Color Of cable is different according to the Standards Standards BROW T G UL Standards BLACK WHITE GREEN 5 2 Outdoor Units MTN A128FS MTN 135 5 TO INDOOR UNIT Pressure switch Parsee ELAK 0 OveR LOAD PROTECTION CAPACITOR A X E NBI CAPACITOR PUE This symbolindicates the ekmeitt iet optional the actrals bape sha lprevail NND eee eee ee EE D ee ee ee A A A 6 Installation details 6 1 Wrench torque sheet for installation Additional Outside diameter Torque tightening torque 06 35 1 4 1500 1600 153kgf cm 163kgf cm 25
12. M 1 3 1 CNI3 2 o LOJ O eu j s jz n NU jc o RED BLACK LfR PLASMA MEN Ie p 4 MIRCO SWITCH T ul T P Pie e m m WIRE CONTROLLER j Ni 2 N 4 m 4 OR ANION GENERATOR AIR COND IT ICER url INDOOR UNIT Bre Terers TO OUTDOOR UNIT 1 NOTE 1 wring diagram is for explaration purpose only The actual shape of the components be different 2 Symbol 1 indicates optional components 3 Ihe Color Of cable is different according to the 5tandards IEC Standards BROW MTN A128FS ee oe C BROWN OR BLACK INDOOR MOTOR dez N BLUE CR WHITE SCC RUE 7 ANT ee amp Y G OR GREEN cs BS 25 EL surety 1 poe L m 1 Ll ELA ms CNG cN12 CN3 M Le EET E FED E gt 11 current DETECT m 1 COMPRESSOR RELAY s a BLACK UO ae a 7 E x 7 W Po ME rx al 5 i xU 5 OPT ONAL im m A BLACK bU i E ie AIL gt 1 MIRCO SWITCH Ej NIRE CONTROLLER j OXYGEN 2 N 4 4 OR ANION GENERATOR LAIR
13. compressor is off the indoor fan will run at breeze 45 Running rules No Condition Indoor fan Compressor and outdoor fan Low ON 6 minutes T1 gt TS 2 Breeze OFF 4 minutes TS lt T1 lt TS 2 Low 5 minutes 7 Breeze OFF 5minutes 3 T1 lt Low ON 4minutes Breeze OFF 6 minutes 8 4 5 2 In drying mode if room temperature is lower than 10 the indoor fan will run at breeze while the compressor and outdoor fan will stop and not resume until room temperature exceeds 13 8 4 5 3 System protection is active in this mode 8 4 6 Forced operation function Press the touch button continually the AC will run as below sequence Forced auto Forced cooling Off Forced cooling mode The compressor and outdoor fan keep running and the indoor fan runs at low speed After running for 30 minutes AC will turn to drying mode with 24 setting temperature Forced auto mode The action of forced auto mode is the same as normal auto mode with 24 C setting temperature e When AC receives signals such as switch on switch off timer on timer off mode setting fan speed setting sleeping mode setting follow me setting it will quit the forced operation e forced operation function can not memorized if power off 8 4 7 Timer 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 automatical
14. e 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 damage B Donotinsert hands or other object through air inlet or outlet while the product is 4 operated There are sharp and moving parts that could cause personal injury B Donotdrink the water drained from the product It is not sanitary could cause serious health issues B Use a firm stool or ladder when cleaning or maintaining the product Be careful and avoid personal injury B 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 B not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode B 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 The designs and information in this book are subject to change without notice for product improvement Operation by remote controller 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
15. en circuit or short circuit x ee Over current protection occurs 4 times CC EEPROM error O light X off flash 49 9 2 Diagnosis and Solution 9 2 1 Indoor fan speed out of control diagnosis Shut off the power supply and turn on it 5s later The unit does not work normally Turn off the unit rotate the cross NO Disassemble the connection between fan and motor check if the bearing is normal If not change the bearing If fan Does it rotate freely yes follow the below step Yes Is the indoor fan motor connector and connection good Yes Is the voltage being applied to the fan Yes motor Replace the fan motor Replace the indoor PCB 50 9 2 2 Open or short circuit of temperature sensor diagnosis and solution Check the connections between the sensors and the PCB Are the connections good Yes i Yes Replace the sensor ane check if Replace outdoor PCB the errors happen again 9 2 3 Over current protection occurs 4 times Current protection Check if the voltage of power supply is too low Yes The power supply is problematic Repair the power supply Check if the operation condition is ormal especially the outdoor unit No Correct the operation condition Yes Disconnect with the power and replace the main PCB Check if the Turn on the units and check if the problem remains Replace the co
16. ere is risk of fire or electric shock B 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 the panel and the cover of control box securely There is risk of fire of electric 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 Donot 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 and evaporator B Forinstallation always contact the dealer or an Authorized service center There is risk of fire electric shock explosion or injury B 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 i
17. gerant 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 Indoor unit Liquid side Outdoor unit V JE ES a ue Two way valve Close L is J hi EX N Gas side T m HL KR ez j Three way valve m pum N Manifold valve c Jl Close Compound meter PA mz p Pressure m 7 E au e ST cd 20Pa n o MEM p IH Handle Lo ET 2 Handle Hi Charge hose Charge hose Le x 3 D t Vacuum a n C pump 36 Vacuum l 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
18. han 30cm M f f 7 LLLLL Ly LY S LLY LLL ty 7 o JN f Wy 74 ZZ LY LL ff Pg TTG B Pd More than 60cm Service space CCCCCCCC 77777777 S 027777 PE rs Y 7 7 ie s 30cm YL 7 7 7 Wf l Y 777 4 JIII pel bly Ul More than 60cm 1 P Air inlet Model MTG A128FS 135 5 11 4 Refrigerant Cycle Diagram Heating pump mode INDOOR UNIT OUTDOOR UNIT CHECK VALVE LIQUID SIDE Heating Model only Ww pt MISI T CAPILLARY TUBE HEAT HEAT EXCHANGE EXCHANGE EVAPORATOR CONDENSER GAS SIDE 4 o T mos DE e ACCUMU VALVE LATOR 495 Heating Model Only COMPRESSOR COOLING HEATING 12 5 Wiring Diagram 5 1 Indoor Units MTN 135 5 Lag BEROWIT OR BLACK N BLUE COR WHITE YG OR TURE SE NBER TE PERATURE bw TH TRANSFORRER es CURRENT DETECT _ ___ 1 PRESSOR RELAY a o BLACK 14 1 P1 HN i oii n ei CN A
19. he service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 6 7 Re installation while the outdoor unit need to be repaired 1 Evacuation for the whole system iam Outdoor unit a y 2 mie A Vacuum pump L Procedure 1 Confirm that both the 2 way and 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 1Mpa 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 33 2 Refrigerant charging on Indoor unit SUZ Liquid side Oudoount a as Fd 2 way valve T i Gas side me UR mr NONO M UE 7 r Check valve away valve IIT T P d Open on T m si be ax La Hi 1 oe D ia N Charging E cylinder ES U 3 pf pa lt Bn 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 y
20. is getting higher T2 gt TE2 the indoor fan will run at setting speed TE1 T2 TE2 the indoor fan will run at low speed When T2 is getting lower TE4 lt T2 lt TE3 the indoor fan will run at low speed 40 T2 lt TE4 the indoor fan will shut off T2 Setting TES 1 TEA While TE1 28 TE2 32 TE3 30 TE4 26 for MTN A128FS TE1 34 2 37 TE3 33 TE4 26 for MTN A135FSmodel T1 TS When 1 75 gt 2 the indoor fan will run at low speed Auto fan action When T1 TssO the indoor fan will run at medium speed 8 4 3 4 High evaporator coil temp T2 protection Compressor off TE Outdoor fan off T2 TE8 TES Compressor and Outdoor fan on MTN A128FS MTN A135FS 41 Compressor off TET Outdoor fan off Compressor and outdobr fan off TE8 Compressor and outdoor fan on Compressor and outdoor fan on 8 4 3 5 Defrosting mode For 9k 12k models e Condition of defrosting AC will enter defrosting mode if any of the following items is satisfied 1 Both A and B are satisfied A The compressor keeps running for 40 minutes B The evaporator coil temp T2 Indoor room temp T 1 meets the below table _ moo No need to compare the T2 and T1 2 After the last defrosting the time that the outdoor fan is off but the compressor is on in high T2 protection cumulates up to 90 minutes e Condition of ending defrosting If any one of the following items
21. 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 then turn to drying modeas 24 setting temp 8 4 10 lonizer Plasma dust collector function optional The indoor unit is equipped with lonizer which is controlled by the CLEAN AIR button on the remote controller When the unit is turned on press the CLEAN AIR button to activate the function Press it 47 again to stop the function During the time when lonizer being controlled by remote controller lonizer will be turned off automatically if indoor fan stops running due to malfunctions or anti cold wind When indoor fan restarts after malfunctions being eliminated and anti cold wind being released lonizer will be available again 48 9 Troubleshooting 9 1 Indoor unit error display Operation lamp Indoor fan speed has been out of control The T1 or T2 sensor is op
22. ling the product 3 It can avoid vibration of water leakage B 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 B Use two or more people to lift and transport the product Avoid personal injury B 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 B 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 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 Do not block the inlet or outlet of air flow It may cause product failure B Usea 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 Donotstep 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 th
23. ly when reaching the setting time 8 4 7 4 Timer on off The machine will turn on automatically when reaching the setting on time and 46 then turn off automatically when reaching the setting off time 8 4 7 5 Timer 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 users set the timer off function and AC is off now the AC will keep the current running mode and then turn off when reaching the setting time 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 After pressing ECONOMIC or SLEEP button on controller the machine will turn into sleep mode When cooling the setting temperature rises 1 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 be higher than 17 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 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 timing is
24. mpressor is compressor normal Check if the capillary is blocked Replace the capillary There 15 some air Evacuate the mixed inside the refrigerant system refrigerant system and recharge gas 51 9 2 4 EEPROM parameter error diagnosis and solution Shut off the power supply and turn on it 5s later The problem comes out again Is the EEPROM chip plugged in indoor PCB well Replace the main PCB of indoor unit 9 2 5 Zero crossing detection error When such failure occurs the main control board must have fault 52 Replace indoor PCB Correct the connection 9 2 6 Indoor outdoor units communication error Turn off the power supply after 1 minute connect the power supply turn on the unit with remote controller The unit does not work normally Check the wiring between indoor and outdoor No unit Is the connection of L N S and GND good Reconnect and retest Yes Is the LED4 red bright and LED1 yellow Replace indoor PCB blinking on outdoor PCB and repower on Is the failure cleared No The unit does not work normally The power supply for outdoor PCB is fail Check the wiring on outdoor PCB Yes comparing with wiring plate ls the Replace outdoor e box connection good Correct the connection 53
25. njury 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 care to ensure that power cable could not be pulled out or damaged during operation There is risk of fire or electric shock B not place anything on the power cable There is risk of fire or electric 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 is 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 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 in 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 lifstrange 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 Stop operation and close the window in storm
26. ou disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is RA10A 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 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 34 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 7 Operation characteristics Temperature l Heating l Cooling operation Drying operation operation 10 C 32 C lt 21000Btu h models Room temperature 17 C 32 0 C 30 C
27. rate 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 gauge and the 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 indoor unit Y TUZA Liquid side Es une S rave N 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 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 31 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immedia
28. rrost start defrosting If indoor fan is breezing or stopped start defrosting Condition 2 If the accumulated time of outdoor fan stopped but the compressor keep working due to evaporator high temperature protection mode reaches 90 min from the end of last defrosting mode Condition of defrosting stop If any one of following conditions occurs the defrosting will finish and the machine will turn to normal heating mode Condition 1 Reached the defrosting time Condition 2 The current of compressor is more than lgefrost continuously more than 7s The value of ldefrost is depending on the exactly machine 44 Defrosting actions compressor 4 way valve outdoor fan indoor fan During the defrosting mode if the machine stopped or transferred to other mode the defrosting mode will stop and all the defrosting conditions will be cleared 8 4 4 Auto mode The machine will choose cooling heating or fan only mode according to AT AT T1 Ts AT 1 Heating for cooling only models they will run at fan only mode AC will run in auto mode in the below cases 1 Press the forced auto button 2 If AC is off it will run in auto mode when timer on function is active 3 After setting the mode AC will run in auto mode if the compressor keeps not running for 15 minutes 8 4 5 Drying mode 8 4 5 1 The indoor fan will run following the compressor If the compressor is on the indoor fan will run at low speed If the
29. tely Do this quickly so that the gauge ends up 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 1 8 kgf m Be sure to check for gas leakage 2 Air purging by the refrigerant Indoor unit Y Liquid side ER T onm N Outdoor unit 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 32 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 t
30. ten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant 28 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 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 oe Indoor unit y TZN Liquid side C Outdoorunt o T T zt valve ao 2 way rT AN Gas side LM a iris 0 inn f away valve e i 1 pum y Charging cylinder b 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 RA10A 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
31. ules The On off outdoor units have single fan speed The outdoor fan will run following the compressor except when AC is in evaporator high temp protection in heating mode condenser high temp protection in cooling mode defrosting mode and the current protection 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 The auto fan Room temp Setting temp high medium 39 8 4 2 4 Evaporator low temperature T2 protection T2 TEG TE5 When the evaporator coil temp T2 keeps lower than 5 for 5 minutes 4 minutes for 21k model the compressor and outdoor fan will shut off When T2 is higher than TE6 the compressor and outdoor fan will restart up 8 4 3 Heating Mode 8 4 3 1 Compressor running rules For the models they will follow the below rules once the compressors start up When indoor room temp T1 is higher than Tj the compressor and outdoor fan will shut off When T1 is lower than Tk the compressor and outdoor fan will start up Tj Tk Tj Ts Tc Tk Ts Tc 1 Tc 1 for 7k 8 4 3 2 Outdoor fan running rules The outdoor units have single fan speed The outdoor fan will run following the compressor except when AC is in evaporator high temp protection in heating mode condenser high temp protection in cooling mode defrosting mode and the current protection Anti cold wind function When evaporator coil temp T2
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