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Single Zone Air Conditioner SVC MANUAL(General)

1. Table 1 Static Pressure Pa Capacity Step CFM 24 5 39 2 58 8 78 4 98 Setting Value HIGH 688 900 970 1080 1190 1260 24K MID 600 860 930 1050 1150 1230 LOW 565 820 900 1020 1120 1200 HIGH 1130 960 1030 1090 1150 36K MID 950 850 960 1020 1090 LOW 706 760 850 950 1000 Notes 1 To get the desired Airflow amp E S P combination from the table set the matching value from the table Value other than that in table will not give the combinations of airflow amp E S P which are mentioned in the table 2 Table data is based at 230V According to the fluctuation of voltage air flow rate varies Only for training and service purposes 18 4 2 E S P External Static Pressure Setting Cassette This function is applied to only duct type Setting this in other cases will cause malfunction Press button for 4 seconds to enter the installer setting mode until timer segment displays 01 01 If pressing button repeatedly it moves to static pressure H selection menu as picture below TRER inja ELE E SE l ESC Select static pressure by pressing button 01 V H 02 F H 03 V L 04 F L E Ti HI go E Function Code Pressure Press button to save ad Pressing button will exit settings mode After setup it automatically gets out of setup mode if there is no button input for 25 seconds When ex
2. Only for training and service purposes 3 Blank Only for training and service purposes 8 2 3 Nomenclature v Eee Ese Jo JL Lo JE E E Only for training and service purposes Installation Type M Multi Zone Marketing Model Electrical rating 1 115V 10 60Hz 3 230V 10 60Hz Refrigeration Cycle C Cool Only Y Heat Pump Application Empty Single U Universal D Dual Zone T Tri Zone Q Quad Zone Capacity 9 9 000 BTU h 12 12 000 BTU h 18 18 000 BTU h 24 24000 BTU h 30 30 000 BTU h 36 36 000 BTU h Model Type W Wall mounted C Cassette D Concealed Ducted R Outdoor component WH Wall mounted High SEER RH Outdoor high SEER Series Mini split B Part2 Functions amp Controls 1 List of Functions amp Accessory iioii ies palin inne 11 1 Ceiling Concealed Duet INDOOR EE 11 2 4 Way Ceiling Cass tte IFIODE EEN 12 3 alt 13 P Un EE 14 2 1 Auto swing TST Tb anne ee 14 2 2 AUTO SWING UP een ernennen 14 2 3 Chaos SWING UP OBND nee ei 14 AE PI BIS Ei E 15 2 5 Chaos wind AUTO o TES T5 2 6 Surge Cool a EE 15 27 SUN WIND S WIDE EE 15 3 Reserved BIA E 4 Installation FUNCIONS E 17 4 1 E S P External Static Pressure Setting DUCT na 17 4 2 E S P External Static Pressure Setting Cassette 19 3 R liability m c H 21 Negli M 21 5 2 Sel diaghnosis FUNC HOM c sou
3. Electric heater operation High ceiling operation Reliability Hot start Self diagnosis Soft dry operation Convenience Auto changeover Auto cleaning Auto operation artificial intelligence Auto restart operation Child lock Forced operation Group control Sleep mode Timer on off Timer weekly Two thermistor control OI OO OO OO O X O IDOoOOgO Individual control Standard wired remote controller DWC1 wired remote controller x Deluxe wired remote controller Simple wired remote controller Wired remote controller for hotel use Wireless remote controller simple Wireless LCD remote control xxx gt lt gt lt Only for training and service purposes 12 3 Outdoor Category Functions MR24UY3J MR36UY3J Defrost Deicing O 0 High pressure switch X X Low pressure switch X X Phase protection X X Reliability Restart delay 3 minutes O O Release Control O O Self diagnosis O O Soft start 0 0 Test function O O Convenience Night Silent Operation O O Low Ambient Kit O Logical operation O Logical operation Only for training and service purposes 13 2 Air flow g 2 1 Auto swing left amp right By the horizontal airflow direction control key input the left right louver automatically operates with the auto swing or
4. 4 FRIEDRICH 1883 Single Zone Air Conditioner SVC MANUAL General DUCTLESS SPLIT SYSTEMS CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel THE EXPERTS IN ROOM AIR CONDITIONING 960 914 06 Air Conditioner Service Manual TABLE OF CONTENTS Part 1 General Information u in 3 1 Safety Precautions EE 4 2 Model Line Up ae 7 EM ID ae E E E N HH 8 Part 2 F nctions amp Controls ne ee 10 1 List of Functions amp ACCESSONy ans ee 11 dil ecc PPP E 14 3 er seo ee 16 4 Installation En E 17 5 BEllaDI Ye 21 6 Convenience Functions amp Controls nenn nnnnnnnennnnnnnennnnnnnn nn 22 7 Specelal Function amp d EE 32 Part 3 Basic Control sa ee 35 1 LEET ew 36 2 Compressor d u 36 3 EEV Electronic Expansion Valve control cccccccscecseseeeeseeeeesneeseeeeesseeeeees 36 Part4 Trouble Seel nee bie dg 37 1 self dlagnosis FUNGON E 38 2 PUMP DOW TT 40 3 Evacuation All amount of refrigerant leaked sessssesse 41 4 Gas Charging After Evacuston eens tense see eeeeeseeeeeeeseeeeeneeeeaees 42 5 CCUG P ll EE 43 D Electronic Parts eek 44 Only for training and service purposes 2 H Part1 General Information 1 Safely PrecautlonB a sn 2 Model Line Up E 3 Nomenclature Only for training and service purposes 3 1 Safety Precauti
5. Connect sensor to PCB correctly Yes Yes Replace corresponding outdoor unit PCB Check Point 1 Estimate the resistance of each sensor Unplugged 2 Check the value of the resistor of thermistor D pipe sensor Inverter Normal Value of the resistor is 200kQ at 25 C Air sensor Normal Value of the resistor is 10kO at 25 C Cond Mid pipe sensor Normal Value of the resistor is 5kQ at 25 C Suction pipe sensor Normal Value of the resistor is 5kQ at 25 C Condenser Out pipe sensor Normal Value of the resistor is 5kO at 25 C i Only for training and service purposes 75 Display Coda Title Cause of error Check point amp Normal condition Bad connection of connector PCB Bad connection high pressure connector 43 Sensor error of high Abnormal value of sensor Defect of high pressure connector Open Short pressure Open Short Defect of connector PCB Open Short Defect of outdoor main PCB Is pressure sensor OK Cf Output voltage is about After replacement of outdoor unit main PCB is the system Check the value of pressure sensor 1 4V at 1500kPa Is sensor connected to PCB correctly Yes also abnormal Replace corresponding pressure sensor Replace the pressure sensor Connect sensor to PCB correctly asd Title Cause of error Check point amp Normal condition 51 Over capacity Ov
6. Refrigerant shortage leakage Deformation because of damage of refrigerant pipe Defective indoor outdoor unit EEV Covering clogging outdoor unit covering during the cooling mode indoor unit filter clogging dur ing heating mode SVC valve clogging Defective outdoor unit PCB Defective indoor unit pipe sensor E Error diagnosis and countermeasure flow chart Open service valve check communication piping correction Is service valve opened Yes Are communication cable piping normal Is amount of refrigerant normal refer refrigerant part Yes Is strainer Ok Yes Are the value of manifold gauge and pressure sensor same Is the low pressure value actually low Check indoor outdoor unit LEV Check Indoor unit PCB Check indoor outdoor unit installation conditions Only for training and service purposes of refrigerant leakage Is there pipe crack or trace Yes Weld reconnect the cracked portion and recharge refrigerant Replace the strainer Replace the pressure sensor Adjust the amount of refrigerant Additive charge If the temperature difference between inlet and outlet of strainer is so large that frost or ice formation can be seen or confirmed then clogging of strainer should be checked Notice it is not full ice forming of strainer in case that there is not at inlet portion but at outlet port
7. E No Correct connection i Yes Or change connection wire Is the soldering state of connector is normal No CN REMO Re soldering component i Yes Or change the PCB Check the volt of main Wired R C Ess DIE PCB power source 12V S GND 12V S GND DC 12V DC 5V RD YL BK RD YL BK Is it normal E No Correct connection i Ves Or change the PCB e 12Vdc Check the installation of wired remote controller Jj a Noise interference O O Is it normal E No Adjust the state Check the Volt Check the Volt of installation S ME Es o Check Point 1 Check the wire connection Open Short Repair the connection 2 Check the soldering state of connector Soldered poorly Repair or Change the PCB 3 Check the volt Of main PCB power source DC 12V gt Repair or Change the main PCB 4 Check the installation of wired remote controller Noise interference gt Adjust the state of installation Only for training and service purposes 50 Display code Title Cause of error Check point amp Normal condition Float switch The connection of wire Drain pump Float switch 04 Drain pump na DU E Drain pump power input 230V Normal short Drain tube installation Float switch Water over flow Indoor unit installation Inclination Check Flow Chart Check the le
8. limit for three minutes continuously intake air temperature reaches below 1 0 C of the temperature of setting temp Compressors three minutes time delay After compressor off the compressor can restart minimum 3 minutes later 6 1 2 Heating Mode Operating frequency of compressor depend on the load condition The difference between the room temp and set temp frequency restrictions H compressor operates at some frequency the operating frequency of compressor cannot be changed within 30 sec onds Condition of compressor turned off When intake air temperature reaches 4 C above the setting temperature Condition of compressor turned on When intake air temperature reaches 2 C above the setting temperature Condition of indoor fan turned off While in compressor on indoor pipe temp lt 20 C While in compressor off indoor pipe temp lt 30 C e While in defrost control between the indoor and outdoor fans are turned off Compressor 2minutes delay After compressor off the compressor can restart minimum 2 minutes later NOTE Some Models are different by temperature of thermo ON OFF CST Duct CVT type indoor unit matched with Single Outdoor unit Multi Outdoor unit Multi V Outdoor unit CST Duct CVT type indoor unit matched with Universal Outdoor unit Thermo ON 2 C above setting temp Thermo ON Setting temp Thermo OFF 4 C above setting temp Thermo OFF 3 C abov
9. 2 Space control Vanes angle can be controlled by pair considering its installation environment For example direct drafts can be annoying leading to der o discomfort and reduced productivity vane control 9 d 7 helps to eliminate this problem 7 MOM Easily controlled by wired remote control Air Flow can be controlled easily regarding any space environment Only for training and service purposes 32 Only for training and service purposes 33 Only for training and service purposes 34 B Part3 Basic Control 1 Normal operation a u inten 2 COMpressor EE 3 EEV Electronic Expansion Valve control c ccccssccessseecseeseseeeeseeeeesneeeseneeesees Only for training and service purposes 35 1 Normal operation Basic principle is to control the rpm of the motor by changing the working frequency of the compressor Three phase voltage is supplied to the motor and the time for which the voltage will supplied is controlled by IPM intelligent power module Switching speed of IPM defines the variable frequency input to the motor Actuator Cooling operation Heating operation Stop state Compressor Fuzzy control Fuzzy control Stop Fan Fuzzy control Fuzzy control Stop EEV auper neang Discharge Temp Control Min Pulse fuzzy control 2 Compressor control Fuzzy control Maintain evaporating temperature Te to be constant on cooling mode and consta
10. 49 6 7 Troubleshooting Outdoor Error erster rond neun toin re aen canibus t snae a EE Eus 55 Only for training and service purposes 37 1 Self diagnosis Function 1 1 Error Indicator Indoor Ceiling Cassette Type Display 10 degrees 1 degrees The number of times to blink Error code Ex Error 03 Remote controller error LEDO2G L LEDI GREEN Error Code Description LED 1 Green LED 2 Red Indoor status 01 Indoor Room sensor error 0 1time OFF 02 Indoor in pipe sensor error 0 2times O OFF 03 Remote controller error 0 Stimes O OFF 04 Drain pump error 0 4times O OFF 05 Communication error indoor and outdoor 0 5times O OFF 06 Indoor out pipe sensor error 0 6times 9 OFF 09 EEPROM error indoor 0 9times 9 OFF 10 BLDC motor fan lock indoor 1time O 0 OFF Because remote controller turn off when occur ERROR in simultaneous operation system it should check LED blinks of outdoor in order to confirm error code Repeatedly after LED1 is turned on and off as the Error code number of tens digit LED2 is turned on and off as the Error code number of single digit Only for training and service purposes 38 1 2 Error Indicator Outdoor LEDO1G D n ll Hl ll Se Outdoor Error RED j En Ex Error 21 DC Peack 1 Sec 1 Time LEDO2G GREEN MR24UY3J MR36UY3J Error Code
11. Check Flow Chart CH09 Check the the connection port Is it normal gt No Correct connection gy Yes Change Option PCB Only for training and service purposes 52 Display code 10 Indoor BLDC Fan Motor The Fan is not operated Yellow White Blue Black Red al Fan motor connector Tester Check Point Check the PCB during the Power on 1 Check the Voltage Red line to Black line gt The Voltage is about input voltage x 1 414 gt if the Voltage does not compair to above Voltage Check the power input Replace the PCB amp Motor 2 Check the Voltage Black line to White the Voltage is DC 15V Check the Power input Replace the motor Check the Motor 1 Check the shaft if the shaft is not turn smoothly the Motor Power IC is defected replace the motor 2 Check the motor resistance if the shaft is turn smoothly check the resistance Check Red line to Black line Blue line to Black line The resistance should infinite replace the motor Only for training and service purposes 53 Title Cause of error Check point amp Normal condition Lock properly Check the Indoor fan locking Display code Title Cause of error Check point amp Normal condition The connector for trans mission is disconnected e Th ti i nad Check power input AC 230V Outdoor Indoor 05 innti Arp mE onae iia Check connector for transmission Communication The com
12. Description ech s Ge Red Green status 21 DC Peak IPM Fault 2times A 1time OFF 22 Max CT CT2 2times A 2times A OFF 23 DC Link Low Volt 2times A 3times A OFF 24 Pressure switch Heater Sink 2times I 4times Q OFF 26 DC Comp Position Error 2times A 6times A OFF 27 PFC Fault Error 2times A 7times A OFF 29 Comp Over Current 2times 9times I OFF 32 D Pipe High Inv 3times Q 2times A OFF 40 CT Sensor Open Short 4times A 0 OFF 41 Inv D Pipe Th Error Open Short 4times A 1time Q OFF 43 High Pressure Sensor Open Short 4times A 3times A OFF 44 Outdoor air Th Error Open Short 4times A 4times A OFF 45 Cond Middle Pipe Th Error Open Short 4times A 5times A OFF 46 Suction Pipe Th Error Open Short 4times A 6times A OFF 48 Cond Out Pipe Th Error Open Short 4times A 8time A OFF 51 Capacity over 5times A 1times Q OFF 53 Communication Error Indoor gt Outdoor 5times A 3times A OFF 60 EEPROM Error Outdoor 6times A 0 OFF 61 Cond Middle Pipe High 6times A 1times OFF 62 Heatsink Error High 6times A 2times A OFF 65 Heatsink Th Error Open Short 6times A 5times A OFF 67 BLDC motor fan lock Outdoor 6times A 7times A OFF If abnormal voltage is supplied the protection circuits will turn off the product in order to prevent the component damage The product will automatically restart after 3 minutes Only for training and service purposes 39 2 Pump Down f Setting Procedure 1 Set the Dip Switch as follow after s
13. case measured value is different from the table PCB needs to be replaced PCB damaged gt F D PFC IPM check Uv Ww RST Only for training and service purposes 57 Display code Title Cause of error Check point amp Normal condition Malfunction of compressor 22 Max C T Input Over Current Blocking of pipe Low voltage input Refrigerant pipe length blocked A WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 2 Check insulation resistance between compressor terminal and pipe gt Replace compressor if abnormality found Are the resistance Between each phase and insulation resistance of Inverter compressor normal 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wiring 3 Check compressor terminal connection condit
14. gt and 1 is the smallest and 255 is the biggest 2 When setting ESP value on the product without very weak wind or power wind function it may not work 6 Select ESP fan step again by using button and setup ESP value as No 4 and 5 that corresponds each wind flow 7 Press button to save 8 Press button to exit After setup it automatically gets out of setup mode if there is no button input for 25 seconds 3 When exiting without pressing set button the manipulated value is not reflected l Function code ESP code ESP value Please be careful not to change the ESP value for each fan step t does not work to setup ESP value for very low power step for some products ESP value is available for specific range belongs to the product Only for training and service purposes 20 5 Reliability 5 1 Hot start When heating is started the indoor fan is stopped or very slow to prevent the cold air carry out When the temp of heat exchanger reach 30 C model by model indoor fan is started 5 2 Self diagnosis Function The air conditioner installed can self diagnosed its error status and then transmits the result to the central control Therefore a rapid countermeasure against failure of the air conditioner allows easy management and increases the usage life of air conditioner Refer to trouble shooting guide 5 3 Soft dry operation Wh
15. little at a time approximately 150g each time while operating the air conditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin Only for training and service purposes This is different from previous procedures Because you are charging with liquid refrigerant from the gas side absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the gas to be discharged Ifthe system has been charged with liquid refrig erant while operating the air conditioner turn off the air conditioner before disconnecting the hose 5 Mount the valve stem nuts and the service port nut 42 Use torque wrench to tighten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage A WARNING When installing or relocation the unit make sure that no substance other than the specified refriger ant R410A enter the refrigerant circult Any presence of foreign substance such as air can cause an abnormal pressure rise and may result in explosion or injury 5 Cycle Part Trouble analysis 1 Check temperature difference between intake and discharge air and check for the operating current too Case Symptom Supposed
16. open or short of connecting wires between Indoor and Outdoor Only for training and service purposes 46 6 4 When indoor Fan does not operate Turn off main power Check the connection of CN FAN Check the Fan Motor l Check the Fuse AC250V T2A Check the related circuit of indoor Fan Motor The pin No 68 of micom and the part for driving SSR Q01M Check the related pattern Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF Turn on the main power Check the SSR high speed operation by remote control the Indoor Fan Motor is connected The voltage of Pin No 1 orange and 3 black of CN FAN About AC 160V over About AC 50V over SSR is not damaged Check SSR Only for training and service purposes 47 6 5 When the louver does not operate Confirm that the vertical louver is normally geared with the shaft of Stepping Motor If the regular torque is detected when rotating the vertical louver with hands Normal Check the connecting condition of CN U D or CNOL R Connector Check the soldering condition on PCB of CN U D or CNOL R Connector Check the operating circuit of the vertical louver Confirm that there is D
17. out of setup mode if there is no button input for 25 seconds 3 When exiting without pressing set button the manipulated value is not reflected Only for training and service purposes 24 6 6 Forced operation To operate the appliance by force in case when the remote control is lost the forced operation selection switch is on the main unit of the appliance and operate the appliance in the standard conditions The operating condition is set according to the outdoor temp and intake air temperature as follows Setting speed of Indoor temp Operating Mode Setting temp indoor fan over 24 C Cooling 22 C 21 24 C Healthy Dehumidification 23 C High speed below 21 C Heating 24 C The unit select the last operation mode in 3 hours Operating procedures when the remote control can t be used is as follows The operation will be started if the ON OFF button is pressed If you want to stop operation re press the button Only for training and service purposes 25 6 7 Group Control When installing more than 2 units of air conditioner to one wired remote controller please connect as the right figure If it is not event communication indoor unit set the unit as slave Check for event communication through the product manual When controlling multiple indoor units with event communication function with one remote controller you must change the master sl
18. outlet of air flow It may cause product failure oo oe ACAUTION Check to see if the parts are mounted correctly and wires are connected Improper installation and connections can cause an electric shock or an injury Check the installation platform or frame has corroded Corroded installation plat form or frame can cause the unit to fall resulting in injury Be sure to check the earth wire is correctly connected After the work has finished be sure to do an insulation test to check that resis tance is 2 Mohm or more between the charge section and the non charge metal section Earth position If the resistance value is low a disaster such as a leak or electric shock is caused at user s side Check the drainage of the indoor unit after the repair If drainage is faulty water may enter the room and wet floor GG DS Only for training and service purposes 6 2 Model Line Up f i 2 1 Indoor units Category Chassis Name Capacity Index kBtu h 24 36 Ceiling Concealed Duct BG MD24Y3J High Static Pressure BR MD36Y3J Ceiling Cassette TP MC24Y3J Ee 4way TM MC36Y3J ES 2 2 Outdoor units DC Inverter MR24UY3J MR36U Y3J indoor units No of connectable units kBtu Total Capacity index of conectable indoor 24 36 Power supply 10 208 230V 60Hz Chassis
19. 20 pin of PCB PFC module 2 Resistance value should be in 7kO 10 at 25 C Only for training and service purposes 81 AUUW24GD2 MR24UY3J PFCM Measuring resistance between No 19 20 pin Only for training and service purposes 82 Display sensor is open or short code Title Cause of error Check point amp Normal condition 1 ODU fan locking 2 Heatsink assembly of INV PCB assemble 65 Heatsink Sensor error inverter iB Hester condition abnormal 3 Defect of temperature sensing circuit part defect of INV PCB E Error Diagnosis and Countermeasure Flow Chart Recheck installation condition and connection of Heat sink Is installation condition normal Is assemble condition of INV PCB heatsink normal Is PCB temperature sensing part normal 1 Check fan locking 2 Check covering of heat exchanger 3 Check distance between ODU and obstacles 4 Check pipe distortion and abnormality 5 Check service valve is opened Eliminate causes for abnormal condition Check assemble condition between INV PCB heatsink and PFC amp IPM module Reassemble if abnormality found Check resistance between NO 19 pin and NO 20 pin of PFC module Replace PCB if abnormality found Check Point 1 Check resistance between No 19 pin and NO 20 pin of PCB PFC module 2 Resistance value should be in 7kO 10 at 25 C 3 Check the PFC Module No 19 20 pin soldering cond
20. C 12V between pin of CN U D CNOL R and GND Confirm that there is a soldering short at following terminals Between D and of MICOM Between Q 8 9 and of MICOM Between and of ICO1M Between and of ICO1M If there are no problems after above checks Check that no objects are catching and interfering parts in the link of the vertical louver Only for training and service purposes 48 6 6 Troubleshooting Indoor Error posu Title Cause of error Check point amp Normal condition l e Connector connection error Normal resistor 10KO at 25 C Unplugged 01 Indoor air sensor Faulty PCB Normal voltage 2 5Vdc at 25 C Plugged Faulty sensor Open Short Refer to sensor resistance table Connector connection error Normal resistor 5KO at 25 C Unplugged 02 Indoor inlet pipe sensor Faulty PCB Normal voltage 2 5Vdc at 25 C Plugged Faulty sensor Open Short Refer to sensor resistance table e Connector connection error Normal resistor 5KO at 25 C Unplugged 06 Indoor outlet pipe sensor Faulty PCB Normal voltage 2 5Vdc at 25 C Plugged Faulty sensor Open Short Refer to sensor resistance table Check Flow Chart Unplug the sensor on Indoor unit PCB Check the Connector connection Is it normal A Yes Estimate the resistance of each sensor E No Correct connection Is t
21. Caused Case 1 Temp difference approx 0 C All amount of refrigerant leaked out Current less than 80 of rated current Check refrigeration cycle Case 2 Temp difference approx 8 C Refrigerant leakage Clog of refrigeration cycle Current less than 80 of rated current Defective Compressor Case 3 Temp difference less than 8 C Excessive amount of refrigerant Current over the rated current Case 4 Temp difference over 8 C Normal Temperature difference between intake and discharge air depends on room air humidity When the room air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is larger 2 Check temperature and pressure of refrigeration cycle in cooling mode Suction pressure Compared with the normal value Temperature of Discharge Air Compared with the normal valve Cause of Trouble Description Defective compressor Current is low SEN Defective 4 way reverse valve Higher Excessive amount of High pressure does not quickly Normal refrigerant rise at the beginning of operation Insufficient amount of Current is low Lower Higher refrigerant Leakage Clogging Only for training and service purposes 43 6 Electronic Parts 6 1 The Product doesn t operate at all Turn off the main power and wait for 10 seconds Turn on the main power again A Beeping sound is m
22. ade from the indoor unit Operating condition of Micom is O K Check Remote controller amp Receiver Check CN DISP1 CN DISP2 of indoor PCB Check the voltage of power supply AC230V AC208V 60Hz and check for the following The voltage of main power supply The voltage applied to the unit The connecting method of Indoor Outdoor connecting cable each color The PCB Assembly Fuse Noise Filter Power Module Bridge Diode etc The operation check of the Indoor PCB Assembly Procedure Specification Remedy 1 The input voltage of power mod 1 AC230V 10 1 Check the power outlet ule Check the rated voltage 2 The output voltage of power mod 2 12V x 3V 2 Replace ule PCB Assembly 4 IC04D 7805 4 DC5V 4 Replace PCB Assembly 5 ICO1A KIA7036 5 The voltage of micom pin 19 5 Replace PCB Assembly DC4 5Vt Only for training and service purposes 44 6 2 The Product doesn t operate with the remote controller Turn on the main power A Beeping sound is made from the indoor unit Refer to 10 1 Yes Check the voltage of power Is it possible to turn on the unit AC208V AC230V 60Hz by ON OFF button on display Yes Is the remote controller When the mark 4 is displayed working properly in LCD screen replace battery Yes Check the contact point of CN DISP 1 2 connector amp Re connector Check display PCB Assembly Voltage betwe
23. ave setting from the indoor unit Indoor units the master slave configuration of the product after completion of indoor unit power OFF and then ON the power after 1 minutes elapsed sign up For ceiling type cassette and duct product group change the Switch setting of the indoor PCB GND Signal wire 3 switch OFF Master 3 switch ON Slave Factory default setting For wall mount type and stand type product change the master slave setting with the wireless remote controller Refer to wireless remote controller manual for detail When installing 2 remote controllers to one indoor unit with event communication function set the master slave of the remote controller Refer to remote controller master slave selection When controlling the group some functions excluding basic operation set ting fan level Min Mid Max remote controller lock setting and time setting may be limited 2 When installing more than 2 wired remote controllers to one air conditioner please connect as the right picture When installing more than 2 units of wired remote controller to one air conditioner set one wired remote controller as master and the others all as slaves as shown in the right picture You cannot control the group as shown in the right for some products Refer to the product manual for more detail DS MASTER LAVE MASTER SLAVE lt When simultaneously connecting 2 s
24. bly normal Model Resistance Q Yes U V 0 628 at 25 C Recheck power and installation condition MR24UY3J V W 0 628 at 25 C W U 0 628 at 25 C U V 0 367 at 25 C E Comp checking method MR36UY3J V W 0 367 at 25 C W U 0 367 at 25 C Model Resistance N at 20 C Terminal Inverter comp U GND 2MO MR24uY3J V GND 2MQ W GND 2MQ U GND 2MQ MR36UY3J V GND 2MO W GND 2MO Only for training and service purposes E AUUW24GD2 MR24UY3J SPM3 1 Wait until inverter PCB DC voltage is discharged after main power off 2 Pull out V V W COMP connector 3 Set multi tester to resistance mode 4 If the value between P and N terminal of IPM is short 0Q or open hundreds MQ PCB needs to be replaced IPM damaged 5 Set the multi tester to diode mode 6 In case measured value is different from the table PCB needs to be replaced PCB damaged PFC_IPM check U V WRST Only for training and service purposes 56 E AUUW36GD2 MR36UY3J U V W CONNECTOR 1 Wait until inverter PCB DC voltage is discharged after main power off 2 Pull out AC L AC N connectors and U V W COMP Connector 3 Set multi tester to resistance mode 4 If the value between P and N terminal of IPM is short 0Q or open hundreds MQ PCB needs to be replaced IPM damaged 5 Set the multi tester to diode mode 6 In
25. button v SUN MON TUE Mr THU FRI SAT Billie Me 171 EMIL ON Please move to hour setup part of S N MON TUE wen THU FRI SAT turning on by using button It is the part to setup the time at which air conditioner is turned on Please change time by using button You can setup hour 0 12 Please move to minute setup part of turning on by using gt button If minute indication blinks please setup minute by using button Only for training and service purposes 28 Please move to AM PM setup part EEN P A SUN SUN MON TUE Aida Ali a FRI CA 1 of turning off by using TG button Mh ac de AM PM setup is identical with 2 l m LION turning on time setup wem edere mes AM FAT 1 11 1OFF gei ILL Sn SUN MON TUE WED THU FRI SAT v Tr IT 1 OFF E ILU Please move to hour setup part of turning off by using Right button It is the part to reserve the time at which air conditioner is we o as Tren L OFF turned off PM LILILIL If hour indication blinks please T setup hour gg SUN MON w MED Tu ER oy Pn nn Ti n 1 LOFF 5 ke Please setup hour and minute BESSEREN t with the method to u in IT D in L OFF setup turning on time Ss PM 1 2 If finishing weekly reservation setup please press setup cancellation button Weekly reservation setup for the day that you set is finished 1 3 If you setup with the method identical wit
26. conds the system will be entered into the installer setting mode After entering into the installer setting mode select the E S P code value by pressing the button E S P code value 03 Select the desired air flow rate with the button Whenever pressing the button SLo gt Lo gt Med gt Hi gt Po will be indicated Select the desired air flow rate value with the temperature up s down t button E S P value range 0 255 E S P value will be indicated at the upper right section of the display window FRIEDRIC S When pressing the C button currently established E S P value will be set up When pressing the fa button and ES button simultaneously for more than 3 seconds after the setting has been completed the setting mode will be released If there isn t any button input for more than 25 seconds the installer setting mode will also be released e N Precaution shall be taken not to alter the E S P value corresponded to each air flow section E S P value can be varied according to the products In the case of going to the next air flow rate stage by pressing the fan speed button during the setup of the E S P value the E S P value of previous air flow rate will be maintained by remembering the E S P value prior to the shift Only for training and service purposes 17 E S P setting value reference
27. e between compressor terminal and pipe Replace compressor if abnormality found Are the resistance Between each phase and insulation resistance of Inverter compressor normal 1 Check inverter PCB assembly U V W connector connection condition Is compressor 2 Check wire disconnection and wiring Wire connection 3 Check compressor terminal connection condition condition normal bad contact gt Reassemble if abnormality found Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly Is inverter PCB assembly normal Yes Recheck power and installation condition AUUW24GD2 MR24UY3J lt CT Sensing Check Point gt Only for training and service purposes 65 gt AUUW36GD2 MR36UY3J Only for training and service purposes 66 pend Title Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref overcharge OR Inverter PCB input 2 a damage Insulation damage Motor nput Instant over zi Current Error E SSES 3 Input voltage abnormal L N 9r aus 4 Power line assemble condition abnormal 5 Inverter PCB assembly Damage input current sensing part A warnine Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with othe
28. e of leakage of the refriger ant and the closed room full with gas is dangerous because a shortage of oxygen occurs Be sure to execute ventilation When removing the front panel or cabinet execute short circuit and discharge between high voltage capacitor terminals If discharge is not executed an electric shock is caused by high voltage resulted in a death or injury Do not turn the air conditioner ON or OFF by plugging or unplugging the power plug There is risk of fire or electrical shock OP eoo D Only for training and service purposes 4 Do not use a defective or underrated circuit breaker Use the correctly rated breaker and fuse Otherwise there is a risk of fire or electric shock Install the panel and the cover of control box securely Otherwise there is risk of fire or electric shock due to dust water etc Indoor outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals Improper or loose connections can cause heat generation or fire Do not touch operate or repaire the product with wet hands Hoding the plug by hand when taking out Otherwise there is risk of electric shock or fire Use a vacuum pump or Inert nitrogen gas when doing leakage test or air purge Do not compress air or Oxygen and Do not use Flammable gases Otherwise it may cause fire or explosion There is t
29. e room temperature is controlled to the setting temperature 18 C When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority When the Jet Cool key is input the upper lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further Vane 2 2 7 Swirl wind Swing It is the function for comfort cooling heating operation The diagonal two louvers are opened the more larger than the other louvers After one minute it is opposite Vane 1 Vane 3 Comparison of Air Flow Types Vane 4 4 Open conventional Swirl Swing New NOTE Some Models are different by swing width and swing pattern Only for training and service purposes 15 3 Reserved Blank f Only for training and service purposes 16 4 Installation Functions 4 1 E S P External Static Pressure Setting DUCT This is the function that decides the strength of the wind for each wind level and because this function is to make the installation easier If you set ESP incorrectly the air conditioner may malfunction This setting must be carried out by a certificated technician When pressing the A button and button simultaneously for more than 3 se
30. e setting temp Only for training and service purposes 22 6 2 Auto cleaning operation Function used to perform Self Cleaning to prevent the Unit from fungus and bad odor Used after the Cooling Operation before turning the unit off clean the Evaporator and keep it dry for the next opera tion The function is easy to operate as it is accessed through the Remote controller Unit ON Cooling Only Operation OFF ee ON Indoor Fan ol tee Setting step L Low OFF ON Setting step 6 3 Auto changeover operation The air conditioner changes the operation mode automatically to keep indoor temperature When room temperature vary over 2 C with respect to setting temperature air conditioner keeps the room tempera ture in 2 C with respect to setting temperature by auto change mode 44 C Switching point 2 C Heating thermo off 0 5 C SET Temp 0 5 C Cooling thermo off 2 C Switching point Cooling Heating operation Cooling operation operation 6 4 Auto restart Operation Whenever there is electricity failure to the unit and after resumption of the power unit will start in the same mode prior to the power failure Memorized condition are on off condition operating mode cooling heating set temperature and fan speed The unit will memorize the above conditions and start with same memorized condition Only for training and service purposes 23 6 5 Chi
31. ection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality found Is compressor Wire connection condition normal Is inverter PCB SCH Check inverter PCB assembly IPM normality normal gt Replace inverter PCB assembly Recheck power and installation condition Only for training and service purposes 87 AUUW24GD2 MR24UY3J lt Main PCB wiring Check Point gt lt Input Power Source Check Point gt Only for training and service purposes 88 gt AUUW36GD2 MR36UY3J lt Input Power Source Check Point gt Only for training and service purposes 89 FRIEDRICH WIRD Friedrich Air Conditioning Co 10001 Reunion Place Suite 500 San Antonio TX 78216 877 599 5665 www friedrich com P No MFL62542027
32. en CN DISP1 3 6 should be DC 5V If problem still persists Replace display PCB Only for training and service purposes 45 6 3 The Compressor Outdoor Fan are don t operate Turn on the main power Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1 C at least When in air circulation mode compressor outdoor fan is stopped Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange EVA When the sensor circuit for Indoor temperature and connector are in bad connection or are not engaged Compressor Outdoor fan is stopped Check the related circuit of RO2H 12 1K RO1H 1K RO4H 6 2K RO3H 1K CO1H 102 C02H 102 Micom pin No 2 Check the Indoor temperature sensor is disconnected or not about 10K at 25 C l Check the Relay RY PWR RY START for driving Compressor Check the voltage between brown and blue cable of terminal to connect the Outdoor About AC208V 230V Check the related circuit of relay in Outdoor PCB Ass y Check Point Comp ON Comp OFF Between Micom No 19 and GND DC 5V DC OV Between ICO1M No 10 and DC 1V DC 12V GND Turn off main power Check the electrical wiring diagram of Outdoor side Check the
33. en the dehumidification operation input by the remote control is received the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature Intake air Temp Setting Temp 26 C lt intake air temp 25 C 24 C lt intake air temp lt 26 C 22 C lt intake air temp lt 24 C intake air temp 0 5 C 18 C lt intake air temp lt 22 C intake air temp intake air temp lt 18 C 18 C intake air temp 1 C While compressor off the indoor fan repeats low airflow speed and stop While the intake air temp is between compressor on temp and compressor off temp 10 min dehumidification opera tion and 4 min compressor off repeat Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp gt Setting Temp 0 5 C In 10 min dehumidification operation the indoor fan operates with the low airflow speed Only for training and service purposes 21 6 Convenience Functions amp 6 1 Cooling amp heating Operations 6 1 1 Cooling Mode Operating frequency of compressor depends on the load condition like the difference between the room temp and the set temp frequency restrictions H the compressor operates at some frequency the operating frequency of compressor cannot be changed within 30 seconds not emergency conditions Compressor turned off when intake air temperature is in between 0 5 C of the setting temp
34. er capacity Combination EE Check the combination table Only for training and service purposes 76 Display Title Cause of error Check point amp Normal condition code Power input AC 230V Outdoor Indoor Title The connector for transmission is disconnected n Communication poorl The connecting wires are misconnected 53 Communication SES The communication line is shorted at GND Indoor gt Outdoor Transmission circuit of outdoor PCB is abnormal Transmission circuit of indoor PCB is abnormal A WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check Point 1 Check the input power AC230V Outdoor Indoor unit 2 Check the communication wires are correctly connected Adjust the connection of wire Confirm the wire of Live Neutral 3 Check the resistance between communication line and GND Normal Over 2MQ 4 Check the connector for communication is correctly connected 5 If one indoor unit is operated normally outdoor PCB is no problem Check the another indoor unit CHO5 is displayed at indoor unit CH53 is displayed at outdoor unit 6 If all indoor unit is displayed CHO5 but outdoor PCB not display CH53 Check the CN COM and CN POWER is correct
35. ets of wired remote controller gt When controlling in groups set the master slaver of the remote controller Refer to Installer setting section on how to set mas ter slave for more detail Only for training and service purposes 26 6 8 Sleep Timer Operation When the sleep time is reached after lt 1 2 3 4 5 6 7 0 cancel hr gt is input by the remote control while in appliance operation the operation of the appliance stops While the appliance is on pause the sleep timer mode cannot be input While in cooling mode operation 30 min later since the start of the sleep timer the setting temperature increases by 1 C After another 30 min elapse it increases by 1 C again When the sleep timer mode is input while in cooling cycle mode the airflow speed of the indoor fan is set to the low When the sleep timer mode is input while in heating cycle mode the airflow speed of the indoor fan is set to the medi um 6 9 Timer On Off 6 9 1 On Timer Operation When the set time is reached after the time is input by the remote control the appliance starts to operate The timer LED is on when the on timer is input It is off when the time set by the timer is reached If the appliance is operating at the time set by the timer the operation continues While in Fuzzy operation the airflow speed of the indoor fan is automatically selected according to the temperature 6 9 2 Off Timer Operation When the set time is
36. h above by selecting the day that you d like to setup it operates weekly reservation If you setup both turning on reservation time and turning off reservation time identically it doesn t operate reservation drive Weekly reservation vw SUN MON TUE WED THU FRI SAT Reservation number Turning on time Turning off time v SUN VOR TUE WED THU FRI SAT corresponding day 3 amp Indoor unit is turned on to desired temperature if it is configured using up down button during preset of weekly operation time Temperature selection range 18 C 30 C When desired temperature is not set it is turned on automatically with desired temperature of previous operation Only for training and service purposes 29 6 11 Two Thermistor Control This is the function to select the temperature sensor to judge the room temperature When pressing the a button and button simultaneously for more than 3 seconds the system will be entered into the installer setting mode After entering into the installer setting mode select the thermistor sensor setting code value by pressing the button Thermistor sensor selection code value 04 Select the desired setting value with the dI tem FAN perature up A down W button 5 e 0 Setting value TEMP 01 Remote OPER controller V O MODE 02 Indoor unit Code value 03 2TH H FRIEDRICH BH Value When p
37. he resistance of the sensor 10 5k at 25 C gy Yes Plug the sensor on Indoor unit PCB E No Correct connection Check Point Unplug the sensor on Indoor unit PCB Estimate the resistance of each sensor Estimate the voltage of each sensor o JO om P Go Only for training and service purposes Estimate the Voltage of each sensor Is the voltage of the sensor 2 5Vdc at 25 C gy Yes Repair or Change the PCB Unplugged Ib No Correct connection Plugged 10k 2 5Vdc KD E Check the resistance Check the voltage If the resistance of the sensor is 10KO 5KQ at 25 C then sensor is normal If the resistance of the sensor is 0 KO or then sensor is abnormal gt Change the sensor Plug the sensor on Indoor unit PCB and Power ON If the voltage of the sensor is 2 5Vdc at 25 C then sensor is normal If the resistance of the sensor is O or 5Vdc then sensor is abnormal gt Repair or Change the PCB 49 prs Title Cause of error Check point amp Normal condition Connector connection ere error i i Communication Error Connection of wire Wired remote controller FAUNA EN Ramo Main PCB Volt DC12V controller Noise interference Connection wire break Check Flow Chart Check the wire connection Open Short Miswirring Is it normal
38. he risk of death injury fire or explosion O 09 gt D A CAUTION Do not turn on the breaker under condition that front panel and cabinet are removed Be sure to earth the air conditioner with an earthing conductor connected to the earthing terminal Conduct repair works after checking that the refrigerating cycle section has cooled down sufficiently Otherwise working on the unit the hot refrigerating cycle section can cause burns Do not tilt the unit when removing panels Otherwise the water inside the unit can spill and wet floor Use the welder in a well ventilated place Using the welder in an enclosed room can cause oxygen deficiency Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred gt oO oO 8 PP Only for training and service purposes 5e 1 2 Inspections after Repair A WARNING Check to see if the power cable is not dirty or loose If the plug is dusty or loose it can cause an electrical shock or fire Do not use a spliced power cable or extension cable or share the same power outlet with other electrical appliances otherwise it can cause an electrical shock excessive heat generation or fire Do not insert hands or other objects through the air inlet or outlet while the prod uct is operating There are sharp and moving parts that could cause personal injury Do not block the inlet or
39. hort Check Point gt 5 ei Sane d rer lt Short Check Point gt Only for training and service purposes 68 Ge Title Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref over Inverter compressor over Inverter compressor input charge 29 2 Compressor damage Insulation damage Motor current current is over 30A damage 3 Input voltage low 4 ODU inverter PCB assembly damage A WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor Are the resistance 0 438 0 628 7 EE cani phase and 2 Check insulation resistance between compressor insulation resistance of Inverter terminal and pipe over 2M9 i compressor normal Replace compressor if abnormality found 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wi
40. hutting the power source down ON LLLITLI papapa papa 8553853974 955806 MR24UY3J MR36UY3J 2 Reset the power 3 Red LED and Green LED of PCB lights during work The indoor unit is operated by force 4 If operation is done Red LED will be turned off If operation is not done normally Red LED will blink 5 Close the Liquid valve only after green LED turned off 7 minutes from the start of the machine Then close the gas valve after Green LED on WARNING When the green LED of PCB is on compressor is going to be off because of low pressure You should return the Dip Switch to operate normally after finishing the operation Improper Pump down will lead to product turn off along with LED green amp red off with in 20 min utes from the initial start Pump Down Dip S W Setting Power on Red LED On Green LED Off v Comp on Red LED On Green LED On Pump Down Start Red LED On Green LED Off Liquid Valve Closed Pump Down Complete Red LED Off Green LED On Gas Valve Closed Power off Red LED Off Green LED On Only for training and service purposes 40 3 Evacuation All amount o Outdoor unit e Procedure 1 Connect the vacuum pump to the center hose of charge set center hose 2 Evacuation for approximately one hour Confirm that the gauge needle has moved toward 0 8Torr 3 Close the valve Lo side on the charge set t
41. ion 27 prs Title Cause of error Check point amp Normal condition Transmission Error Communication Error 1 Micom defect Circuit defect 39 Between PFC Micom Between PFC Micom 2 Different Micom S W Version INV Micom and INV Micom 3 ODU inverter PCB assembly damage E Error Diagnosis and Countermeasure Flow Chart Is PFC Micom amp INV Micom S W Program normal Upgrade Micom Program Is Inverter PCB assembly normal Replace inverter PCB assembly Recheck power and installation condition Only for training and service purposes f2 TP Title Cause of error Check point amp Normal condition code e Malfunction of current detection circuit C T Open Short 40 Sensor Error Initial current error Check CT Sensor output voltage 2 5Vdc 5 WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart Check L N Voltage is 230V 15 Is input voltage normal Is Inverter PCB Normal Replace inverter PCB assembly Yes Recheck power and installation condition Check Point 1 Check the Input Voltage L1 L2 gt 230V 10 2 Check Input Voltage Sensor output voltage 2 5Vdc 10 lt Inpu
42. ion bad contact gt Reassemble if abnormality found Is compressor Wire connection condition normal Check connection between inverter PCB assembly and bridge diode misconnection disconnection gt wiring again if abnormality found Is inverter PCB assembly power connection normal Check Is input voltage normal L N phase is 230V 15 Check connection condition and wiring if power is abnormal Check inverter PCB assembly IPM normality Replace inverter PCB assembly Is inverter PCB assembly normal Yes Recheck power and installation condition Only for training and service purposes 58 Check Point 1 Check the power source 230V 15 2 Check the fan operation is right 3 Check the current 4 Check the install condition 5 Check the CT Sensor Output signal LUU247HV Check output the CT Sensor DC 2 5 0 2V LUUS67HV LUU427HV Check output pin 2 3 of the CT Sensor DC 2 5 0 2V AUUW24GD2 MR24UY3J CT Sensing Check Point Inverter PCB gt CT Sensing Check Point Only for training and service purposes 59 Display Title Cause of error code Check point amp Normal condition DC Link Voltage is above 420Vdc 23 DC Link High Low Volt DC Link Voltage is below 140Vdc Check CN LL CN N Connection Check Input Voltage Check PCB DC Link voltage sensor parts A WARNING Before checking PCB or each outdoo
43. it is fixed to the desired direction Left TI 110 120 2 2 Auto swing up amp down By the auto swing key input the upper lower vane automatically operates with the auto swing or it is fixed to the desired direction Close 110 120 Open 2 3 Natural wind swing up down By the natural wind swing key input the upper lower vane automatically operates with the natural wind swing or it is fixed to the desired direction CLOSED 110 120 Only for training and service purposes 14 2 4 Air flow step Step Discription Indoor fan motor control have 6 steps LL Very low In heating mode Air volume is controlled SH H Med Low by remote controller L cow LL step is selected automatically in Hot start operation M Med H High SH Super high Auto Chaos wind 2 5 Natural wind auto wind When Auto step selected and then operated the high medium or low speed of the airflow mode is operated for 2 15 sec randomly by the Natural Simulation 2 6 Surge Cool Mode Operation While in heating mode or Fuzzy operation the Jet Cool key cannot be input When it is input while in the other mode operation cooling dehumidification ventilation the Jet Cool mode is operat ed In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation th
44. iting without pressing set button the manipulated value is not reflected lt Static Pressure Setting Table gt Pressure selection Function Zone state ESP standard value 01 V H Variable High 02 F H Fixed High 03 V L Variable Low 2 FL Fixed Dos Only for training and service purposes 19 This is the function that decides the strength of the wind for each wind level and because this function is to make the installation easier If you set ESP incorrectly the air conditioner may malfunction This setting must be carried out by a certificated technician IE 1 If pressing amp button long for 3 seconds it enters into remote controller setter setup mode HL A LI f pressing once shortly it enters into user setup mode Please press more than 3 seconds for sure Geer 2 If entering into ESP setup mode by using amp button it indicates as the picture below aan st rin LI 3 D LILI gt ESP step Function Code ESP value 3 Select ESP fan step by pressing EI button 01 very low 02 low 03 medium 04 high 05 very high U3U B Function code ESP code ESP value 4 Move to ESP value setting by pressing button It is 000 when delivering D from the warehouse G30 Ulo CH Press button to setup ESP value AS It is possible to setup ESP value from 1 to 255 lt
45. ition Only for training and service purposes 83 AUUW24GD2 MR24UY3J PFCM Measuring resistance between No 19 20 pin Only for training and service purposes 84 Display code Title Cause of error Check point amp Normal condition 1 ODU fan locking pan BPM Oe 2 Heatsink assembly of INV PCB assemble condi less for 5 sec when ODU 67 Fan Lock Error tion abnormal fan starts or 40 RPM or less after fan starting 3 Defect of temperature sensing circuit part defect of INV PCB E Error Diagnosis and Countermeasure Flow Chart Check ODU Fan Motor assemble condition and fan locking gt Reassemble or replace if abnormality found Is ODU Fan Motor Assemble condition normal 1 Set the multi tester to diode mode 2 Check voltage between 1pin and 4pin of Fan Motor Is ODU Fan Motor normal 1 0 2V 3 Replace Inverter PCB if abnormality found Check wiring between OUD fan motor and Inverter PCB Is wire connection of Check if Hall Senor and Motor output terminal color is ODU Fan Motor wire normal matched Reassemble if abnormality found Is Inverter PCB assembly normal Replace Inverter PCB assembly Recheck power and installation condition Check Point 1 Check voltage between 1pin and 4pin of Fan Mortor connector Tester diode mode 2 Voltage value should be in 1V 0 2V 3 Do not replacing all of fan motor and PCB at once Check er
46. ld Lock Function It is the function to use preventing children or others from careless using During the operation when pressing the a button and button for approx 3 seconds the Child Lock Function can be used At the time of initial setting of the Child Lock the CL Will be indicated approx 3 seconds at the temperature Display section before resuming to the previous mode After the setting of the CL if another button is setup the button can not be recognized as the CL is indicated at the temperature display section for approx 3 seconds If the CL function is wanted to be used under the operation standby state press the fa button and Button for approx 3 seconds under the standby mode state and the system will be the CL state As for the releasing method when pressing the Button and button for approx 3 seconds the CL function can be released It is the function to use preventing children or others from careless using Press button repeatedly until the amp is flashing If moving to setup icon area by using button setup icon blinks and child lock function is setup if iJ IS GI When cancelling lock function if moving to cancel icon by pressing button and then pressing button child lock function is cancelled Press button to exit After setup it automatically gets
47. ly connected Only for training and service purposes 77 pend Title Cause of error Check point amp Normal condition Inverter PCB amp Mai DRONA 1 EEPROM contact defect wrong insertion nverter ain Ccess error f 60 EEPROM check sum error and Check SUM error 2 Different EEPROM Version 3 ODU Inverter amp Main PCB assembly damage A warnine Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check EEPROM insert direction connection condition Is EEPROM insertion normal 2 Check EEPROM Check SUM Replace if abnormality found Is inverter PCB assembly normal Yes Y MAIN PCB assembly normal Recheck power and installation condition Check Point Check the EEPROM Check sum amp Direction Replace inverter PCB assembly Replace MAIN PCB assembly AUUW24GD2 MR24UY3J Only for training and service purposes 78 AUUW36GD2 MR36UY3J Only for training and service purposes EEPROM 79 a Title Cause of error Check point amp Normal condition Overload operation Outdoor fan constraint screened blocked Check outdoor fan constraint screened flow High temperature in out O
48. munication line Check wi z Indoor lt gt Outdoor is break Check wires are misconnecting Outdoor PCB is Check transmission circuit of outdoor PCB abnormal Check transmission circuit of indoor PCB Synchro of IDU is abnormal Indoor PCB is abnormal Check of IDU setting DIP SW Check Flow Chart Check the input power AC230V Outdoor Indoor unit Is it normal 230V 10 y Yes Check the communication wires are correctly connected Is it normal i Yes Check the resistance between communication line and GND Normal Over 2M E Is it normal Yes Is connector for communication correctly connected eh Only for training and service purposes mb No corre Needs electric work Is the connection of GND GND1 GND2 No ctly connected Correct connection i Yes Change PCB No Adjust the connection of wire Confirm the FUSE 250V 5A wire of Live 1 L1 2 L2 4 L4 2 L2 Neutral Signal EI sr af amt I d BRI BL RDI yv A POWER SUPPLY TO INDOOR UNIT 1 220 240V 50Hz No Correct connection 54 wy w G CHO5 is displayed at indoor unit CH53 is displayed at outdoor unit 6 7 Troubleshooting Outdoor Error Bu Title Cause of error Check point amp Normal condition An instant over curre
49. nt condensing temper ature Tc on heating mode by fuzzy control to ensure the stable system performance Linear control Min frequency s System capacity Cooling and heating load Inverter linear control as cooling and heating load increasing 3 EEV Electronic Expansion Valve EEV operates with fuzzy control rules to keep The degree of superheat 2 3 C or the target temperature of discharge pipe Cooling mode The degree of superheat Tsuction Tevaporator Tsuction temperature at suction pipe sensor C Tevaporator evaporation temperature C Heating mode the target temperature of discharge pipe T condenser o T condenser condenser temperature C Only for training and service purposes 36 E Part 4 Trouble Shooting 1 Self diagnosis FUNCON nn a ra 38 1 1 Error ele Tee COG tUm 38 1 2 Error Indicator QUIGDOON en ea au 39 2 PUMP DOWN ET 40 Bs EVACUAllON nn een eine 41 4 CCCEeI DID 42 5 GYCle Part ae 43 6 Electronic Parts ae 44 6 1 The Product doesn t operate at all ne SEENEN 44 6 2 The Product doesn t operate with the remote controller Ak 45 6 3 The Compressor Outdoor Fan are don t operate sess 46 6 4 When Indoor Fan does n t perale une pida b a taba leu d uu 47 6 5 When the louver does not ODGFale sissiesrenbeo tir member uota Ea Pia CX R RR geg 48 6 6 Troubleshooting Indoor Error nungen eni morena d s
50. nt in the U V W phase Instant over current Reeg ion of U V W 21 DC PEAK velut Rated current Ge of U V IPM Fault Poor insulation of IPM AL Overcharging of refrigerant Pipe length Outdoor Fan is stop Poor insulation of compressor A warnine Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 2 Check insulation resistance between compressor terminal and pipe Replace compressor if abnormality found Are the resistance Between each phase and insulation resistance of Inverter compressor normal 1 Check inverter PCB assembly U V W connector connection condition Is compressor 2 Check wire disconnection and wiring wire connectian 3 Check compressor terminal connection condition condition normal bad contact gt Reassemble if abnormality found Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly Is inverter PCB assem
51. ons To prevent injury to the user or other people and property damage the following instructions must be followed E Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is classified by the follow ing indications AWARNING This symbol indicates the possibility of death or serious injury CAUTION This symbol indicates the possibility of injury or damage to properties only E Meanings of symbols used in this manual are as shown below D Be sure not to do Q Be sure to follow the instruction AN Dangerous Voltage 1 1 Cautions in Repair A WARNING Be sure to disconnect the power cable plug from the plug socket before disas sembling the equipment for a repair Internal components and circuit boards are at main potential when the equipment is connected to the power cables This volt age is extremely dangerous and may cause death or severe injury if come in con tact with it Do not touch the discharging refrigerant gas during the repair work The discharging refrigerant gas The refrigerant gas can cause frostbite Release the refrigerant gas completely at a well ventilated place first Otherwise when the pipe is disconnected refrigerant gas or refrigerating machine oil discharges and it Can cause injury When the refrigerant gas leaks during work execute ventilation If the refrigerant gas touches to a fire poisonous gas generates A cas
52. or sensor normal Only for training and service purposes Check fan locking Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check pipe folding and abnormality Check service valve lock Remedy remove cause of error Check refrigerant leakage Supply refrigerant if not enough refrigerant Remedy Treat the leakage point Supply additional refrigerant Check the status of PCB CN EEV1 assembly Check the status of EEV assembly Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method f Remedy LEV assembly replacement Ccheck the sensor assembly status Check if the sensor is burned measure resistance gt 200K0 10 25 C basis 70 Inspecting Inverter Compressor Discharge Sensor Set Multi tester as resistance measurement mode 2 Measure the resistance between inverter discharge sensor connector pins 3 Measure resistance value of 200KN 10 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MO or more ok CN THS3 RED 4Pin Connector Display ESCH Title Cause of error Check point amp Normal condition 35 Low Presser Error Excessive decrease of low pressure Defective low pressure sensor Defective outdoor indoor unit fan
53. r washable anti fungus X Drain pump O E S P control O Installation Electric heater X High ceiling operation X Auto Elevation Grille x Hot start O Reliability Self diagnosis O Soft dry operation O O x x O O x O O O O O Two thermistor control Standard Wired remote controller DWC1 Deluxe wired remote controller X Individual l e dono Simple wired remote controller O Simple Wired remote controller for hotel use X Wireless remote controller X General central controller Non LGAP X Network Network Solution LGAP X function Dry contact X PI 485 for Indoor Unit X Special Zone controller X pocia CTI Communication transfer interface X function kit Electronic thermostat X Others Remote temperature sensor X Only for training and service purposes 11 2 4 Way Ceiling Cassette Indoor Category Function Remark Air flow Air supply outlet 4 Airflow direction control left amp right Airflow direction control up amp down Auto Auto swing left amp right X Auto swing up amp down O Airflow steps fan cool heat 4 5 4 Natural swing X Natural wind auto wind Surge cool Power wind Swirl wind OOo Air purifying Deodorizing filter Plasma air purifier Prefilter washable anti fungus Installation Drain pump E S P control OIlOOo x
54. r electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart Is input voltage normal Is Inverter PCB assembly Power connection normal Is Inverter PCB Normal Recheck power and installation condition Only for training and service purposes 60 Check L N Voltage is 230V 15 Check connection from terminal block to Inverter PCB assembly CN L CN N Replace inverter PCB assembly Check Point 1 Check the WCN_P L P N Connection condition at the Main PCB Refer to outdoor wiring diagram 2 Check the DC Link voltage at not operating 280V T 3 Check the DC Link voltage at Comp operating 340V T 4 Check DC Link Sensing Signal 2 4 2 8V Refer the Picture AUUW24GD2 MR24UY3J Red Black Vdc CT Sensing Check Point Only for training and service purposes 61 gt AUUW36GD2 MR36UY3J GND Only for training and service purposes 62 Display code Title Cause of error Check point amp Normal condition 25 Input voltage Abnormal Input voltage 140Vac 300Vac Check the power source Check the components E Error Diagnosis and Countermeasure Flow Chart Is input voltage normal Check L N Voltage is 230V 15 Is In
55. r parts Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion Is installation condition normal 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure Reassemble or manage if abnormality found Check Is input voltage normal L N phase voltage is 230V 15 Check connection condition and wiring if power is abnormal condition normal Is compressor Wire connection condition normal Is inverter PCB assembly normal Recheck power and installation condition 3 PFCM Moudle checking method D Set the multi tester to diode mode Check short between input signal pin which are placed below PFC Module 8 Replace PCB assembly if it is short between pins except No 4 5 pins Ay caution PFCM module No 4 5 pins are internal short state Only for training and service purposes 67 1 Check L N connection condition Is AC input Wire connection 2 Check wire disconnection and wiring gt Reassemble if abnormality found 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality found Check inverter PCB assembly PFCM normality Replace inverter PCB assembly AUUW24GD2 MR24UY3J 5 QQ Q WTRTRTRTETE a Ai Ach dens dei lt S
56. reached after the time is input by the remote control the appliance stops operating The timer LED is on when the off timer is input It is off when the time set by the timer is reached If the appliance is on pause at the time set by the timer the pause continues Only for training and service purposes 27 6 10 Weekly Program You can set the daily reservation in weekly unit Weekly reservation keeps operating until before you cancel it once you setup Please move to reservation setup mode by pressing reservation button You can setup two weekly reservations for one day and up to fourteen reservations for a week For example to setup Tuesday morning 11 30 turned on afternoon 12 30 turned off you setup in order below 3 Please move to weekly by xcd I repeatedly pressing reservation wem STEEN button Weekly blinks at this time EH AM HU Leon Please select weekly reservation or ano SI VON TUE WED THU rn SA weekly reservation j by using dk 3 au v button You can setup two reservations Ee y TAA NANA weekly reservation 1 and weekly reservation 2 for a day Please move to date setup part by E SUN FTON TUE WED THU FRI SAT using button If date ah D I ee f LILILILION indication blinks please setup date MW You can setup date from Monday to ve SUN MON CENE kl gesuerg Sunday am IL k LIL UL CON Please move to AM PM setup part GE of turning on by using v
57. ressing the button currently established thermistor sensor location will be set up When pressing the D button and button simultaneously for more than 3 seconds after the setting has been completed the setting mode will be released If there isn t any button input for more than 25 seconds the installer setting mode will also be released lt Thermistor Table gt Temperature sensor selection Function 01 Remote controller Operation in remote controller temperature sensor 02 Indoor unit Operation in indoor unit temperature sensor Operation of higher temperature by comparing indoor unit s and wired remote Cooling controller s temperature 03 2TH There are products that operate at a lower temperature Operation of lower temperature by comparing indoor unit s and wired remote Heating controller s temperature 3 amp The function of 2TH has different operation characteristics according to the product Only for training and service purposes 30 This is the function to select the temperature sensor to judge the room temperature If pressing button long for 3 seconds it enters into remote controller setter setup mode If pressing once shortly it enters into user setup mode Please press more than 3 seconds for sure If moving to room temperature perception sensor selection menu by pressing button it indicates as picture below p3 d Ir FR Z
58. ring 3 Check compressor terminal connection condition bad contact Reassemble if abnormality found Is compressor Wire connection condition normal Check Is input voltage normal L N phase is 230V 15 gt Check connection condition and wiring if power is abnormal Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly Is inverter PCB assembly normal Yes Recheck power and installation condition Only for training and service purposes 69 Display Coda Title Cause of error Check point amp Normal condition High temperature in 32 Discharge pipe of the inverter compressor Overload operation Outdoor fan constraint screened blocked e Refrigerant leakage insufficient Poor INV Comp Discharge sensor poor LEV assembly LEV connector displaced Check outdoor fan constraint screened flow structure Check refrigerant leakage Check if the sensor is normal Check the status of EEV assembly A WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Is the unit properly installed Is there enough refrigerant 7 Yes Is the EEV properly assembled Is the inverter compress
59. ror code again after replacing the abnormal part Fan Motor or PCB first E DDDDDDD Only for training and service purposes 85 gt AUUW24GD2 MR24UY Only for training and service purposes J 86 Check voltage betwen 1pin and 4pin of fan motor Fan motor connector Tester Display code Title Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref overcharge AC input instant over cur Inverter PCB input power A e NE damage 73 rent error current is over 48A peak g g 3 Input voltage abnormal L N 4 Power line assemble condition abnormal 5 Inverter PCB assembly damage input current sensing part Matter of software for 2ms E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal Check Is input voltage normal L N phase voltage is 230V 15 gt Check connection condition and wiring if power is abnormal 1 Check L N connection condition Is AC input Wire connection 2 Check wire disconnection and wiring condition normal gt Reassemble if abnormality found 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconn
60. s otis br dion tatur rtc zelo re S RR E dU A tU 21 ee E epe 21 6 Convenience Functions amp Controls AAA 22 6 1 Cooling amp healing ODGEFAIOTIS EE 22 6 2 Auto cleaning Operation Mm 23 6 3 Auto CHANG COVE OperatlOM EE 23 BA Auto restart OD amp SI de 23 6 5 Child Lock FUNCION DEE 24 6 6 Forced perati M EE 25 8 7 Group COMMU E T T 26 6 8 Sleep Timer OperatiOM nee ea 27 6 9 TIMGN OM OM EE 27 6 10 Weekly Progra EE 28 6 11 Two Thermistor Content ae anden 30 p cuis une nennen een seen 32 7 1 LOW Ambient Eet de bili uo uuu uu RR OG CM dn icut nu ROUGE 32 Ed e E 32 TS Auto Elevation Gr PTT 32 Only for training and service purposes 10 1 List of Functions amp Ac 1 Ceiling Concealed Duct Indoor Convenience Auto changeover Auto cleaning Auto operation artificial intelligence Auto Restart Child lock Forced operation Group control Sleep mode Timer on off Timer weekly Category Functions Remark Air supply outlet 1 Airflow direction control left amp right X Airflow direction control up amp down X Auto swing left amp right X Air flow Auto swing up amp down X Airflow steps fan cool heat 3 3 83 Chaos wind auto wind X Jet cool heat X X Swirl wind X Triple filter Deodorizing X Air purifying Plasma air purifier X Allergy Safe filter X Long life prefilte
61. t Power Source Check Point gt Only for training and service purposes 73 gt AUUW24GD2 MR24UY3J peer ee eee lt CT Sensing Check Point gt gt AUUW36GD2 MR36UY3J lt Inverter PCB gt lt CT Sensing Check Point gt Only for training and service purposes 74 Gd Title Cause of error Check point amp Normal condition Open Short 1 Bad connection of thermistor connector 41 D pipe sensor Inverter Soldered poorly 2 Defect of thermistor connector Open Short Internal circuit error 3 Defect of outdoor PCB Open Short 1 Bad connection of thermistor connector 44 Air sensor Soldered poorly 2 Defect of thermistor connector Open Short Internal circuit error 3 Defect of outdoor PCB Condenser Nid pipesens Open Short 1 Bad connection of thermistor connector 45 Sor pip Soldered poorly 2 Defect of thermistor connector Open Short Internal circuit error 3 Defect of outdoor PCB Open Short 1 Bad connection of thermistor connector 46 Suction Pipe sensor Soldered poorly 2 Defect of thermistor connector Open Short Internal circuit error 3 Defect of outdoor PCB Condenser Gatnibesan Open Short 1 Bad connection of thermistor connector 48 Sat pip Soldered poorly 2 Defect of thermistor connector Open Short Internal circuit error 3 Defect of outdoor PCB E Error Diagnosis and Countermeasure Flow Chart Is sensor connected to PCB correctly
62. tester as resistance measurement mode Measure the resistance between rated speed Comp Discharge sensor connector pins Measure resistance value of 5kON 10 25 C basis Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more 2 CN C PIPE Violet 3Pin Connector Display temperature is over 85 C code Title Cause of error Check point amp Normal condition 1 ODU fan locking 2 Heatsink assembly of INV PCB assemble condi 62 Heatsink High error Inverter PCB heatsink tion abnormal 3 Defect of temperature sensing circuit part defect of INV PCB ll Error Diagnosis and Countermeasure Flow Chart Yes Check Point Is installation condition normal Is assemble condition of INV PCB heatsink normal Is PCB temperature sensing part normal Recheck installation condition and connection of Heat sink 1 Check fan locking 2 Check covering of heat exchanger 3 Check distance between ODU and obstacles 4 Check pipe distortion and abnormality 5 Check service valve is opened Eliminate causes for abnormal condition Check assemble condition between INV PCB heatsink and PFC amp IPM module gt Reassemble if abnormality found Check resistance between NO 19 pin and NO 20 pin of PFC module Replace PCB if abnormality tound 1 Check resistance between No 19 pin and NO
63. u Set Thermistor value by pressing button 01 Remote Controller 02 Indoor 03 2TH Y Function Code Thermistor setting Press button to save 0401 Pressing button will exit settings mode k After setup it automatically gets out of setup mode if there is no button input for 25 seconds 3 When exiting without pressing set button the manipulated value is not reflected Thermistor Table Temperature sensor selection Function 01 Remote controller Operation in remote controller temperature sensor 02 Indoor unit Operation in indoor unit temperature sensor Operation of higher temperature by comparing indoor unit s and wired remote Cooling controller s temperature 03 2TH There are products that operate at a lower temperature Operation of lower temperature by comparing indoor unit s and wired remote Sg controller s temperature M The function of 2TH has different operation characteristics according to the product Only for training and service purposes 31 7 Special Function l 7 1 Low Ambient control This Function is for cooling operating in outdoor low temperature H outdoor temperature drops below certain temperature liquid back is prevented by reducing outdoor fan speed It can prevent frosting of evaporator and keep cooling operation Outdoor pipe Outdoor Setting Setting Fan Speed Speed Speed Setting Speed 7
64. urn off the vacuum pump and confirm that the gauge needle does not move approxima tely 5 minutes after turning off the vacuum pump Only for training and service purposes 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed A WARNING Use a vacuum pump or Inert nitrogen gas when doing leakage test or air purge Do not compress air or Oxygen and do not use Flammable gases Otherwise it may cause fire or explosion Otherwise it may cause personal injury 41 4 Gas Charging After i Charging cylinder Outdoor unit e Procedure 1 Connect the charge hose to the charging cylinder Connect the charge hose which you dis con nected from the vacuum pump to the valve at the bottom of the cylinder f you are using a gas cylinder also use a scale and reverse the cylinder so that the sys tem can be charged with liquid 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 refriger ant The procedure is the same if using a gas cylinder 3 Open the valve Lo side on the charge set and charge the system with liquid refrigerant If the system can not be charged with the spec ified amount of refrigerant it can be charged with a
65. utdoor unit heat l structure l 61 door Cond Pipe exchanger contaminated Check if refrigerant overcharged i EEV connector displaced Check the status of EEV assembly poor EEV assembly Check the status of sensor assembly burn Poor Cond Pipe sensor assembly burned A WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be c areful of the short circuits with other parts Check fan locking Remove blockings around heat exchanger Maintain distance between outdoor unit and i i lt Is ne unit properly ar gt ihe wall Check pipe folding and abnormality Check SVC valve lock Remedy remove cause of error Yes Is the refrigerant properly charged Check if refrigerant is overcharged Remedy adjust refrigerant volume Yes Is the EEV properly Check the status of PCB CN EEV1 assembled 7 assembly Check the status of EEV assembly Yes Check the sensor assembly status Check if the sensor is burned measure resistance gt 5KQ 10 25 C basis Is the Cond Pipe No sensor normal Yes Recheck power and installation condition 80 Only for training and service purposes Remedy EEV reassemble replacement Inspecting Cond Pipe Sensor 1 Set Multi
66. vel of water Float moves top position Is it normal i Yes Is the float switch clean Yes Check the wire connection Open Soldered poorly Is it normal gy Yes Is the resistance of f loat switch normal short Check Point gt No Check Drain Pump No Clean float switch E No Correct connection Or re soldering PCB gt No Change the float switch Drain pump check Check the wire connection Open Soldered poorly Is it normal gt No Correct connection Or re soldering PCB y Yes Is the resistance of Drain Pump Normal gt No about 400 Change the Drain Pump i Yes Is the drain pump clean Yes Check drain tube installation No Clean drain pump 1 Check the wire connection Open Short gt Repair the connection 2 Check the soldering state of connector Soldered poorly Repair or Change the PCB 3 Check the volt Of main PCB power source DC 12V gt Repair or Change the main PCB 4 Check the installation of wired remote controller Noise interference gt Adjust the state of installation x To change drain pump assmbly for service first separate c box and disassemble drain pump assembly for LHN240HV Only for training and service purposes 51 Bee Title Cause of error Check point amp Normal condition EEPROM Check the poor soldering Us Check sum Indoor Check sumaran Check the PCB Connection
67. verter PCB Normal Replace inverter PCB assembly Yes Recheck power and installation condition Check Point 1 Check the Input Voltage L1 L2 gt 230V 10 2 Check Input Voltage Sensor output voltage 2 5Vdc 10 Input Power Source Check Point gt Only for training and service purposes 63 peer eeeee san dm CT Sensing Check Point gt AUUW36GD2 MR36UY3J lt Inverter PCB gt lt Input Voltage Sensing Check Point gt Only for training and service purposes 64 a Title Cause of error Check point amp Normal condition DC Compressor Compressor Check the connection of comp wire U V W 26 a St ba fail error Malfunction of compressor E TALS Check the component of IPM detection parts A warn nG Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 2 Check insulation resistanc

Single Zone Air Conditioner SVC MANUAL(General)

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