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TGM MWVT09S, Service Manual

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TGM MWVT09S Service Manual Download Page 46

Service manual 

 

                            - 45 - 

10.2.4    E3(indoor fan speed out of control) diagnosis and solution 

 

 

10.2.5    E5(Open or short circuit of outdoor temperature sensor) diagnosis and solution. 

 

 

10.2.6    E6(open or short circuit of room or evaporator temperature sensor) diagnosis and solution. 

 

 

10.2.7    P0(IGBT over-strong current protection) diagnosis and solution. 

 

 

Is all connections on PCB 
and between PCB and 
compressor good?   

Repair or correct the 
connector or connection. 

Replace the outdoor PCB 
and then repower on. Is 
the failure cleared? 

NO 

YE

Check the compressor 

NO 

Is the indoor temperature 
and evaporator sensor 
connector and connection 
good? 

Repair the connector and 
reconnect 

Replace the sensor and 
check if E6 display again? 

NO 

YES 

Replace the indoor PCB 

YES 

Is the outdoor temperature 
sensor connector and 
connection good? 

Repair the connector and 
reconnect 

Replace the sensor and 
check if E5 display again? 

NO 

YES 

Replace outdoor e-box 

YES 

Is the indoor fan motor 
connector and connection 
good? 

Repair the connector and 
reconnect 

Is voltage being applied to 
the fan motor? 
(rang 90v-160v between 
mid pin and N on CN1 

NO 

YES 

Indoor PCB is defective. 
Replace the indoor PCB. 

YES 

Replace the indoor fan 
motor 

NO 

Summary of Contents for MWVT09S

Page 1: ......

Page 2: ... valves 28 8 8 Evacuation 29 8 9 Gas charging 30 9 Electronic function 31 9 1 Abbreviation 31 9 2 Display function 31 9 3 Protection 32 9 4 Fan Only Mode 33 9 5 Cooling Mode 33 9 6 Drying mode 34 9 7 Heating mode 35 9 8 Auto mode function 38 9 9 Forced operation function 38 9 10 Action of 4 way valve 38 9 11 Two speeds outdoor fan function 39 9 12 Timer function 39 9 13 Sleep function mode 39 9 14...

Page 3: ...ot install remove or reinstall the unit by yourself customer There is risk of fire electric shock explosion or injury Be caution when unpacking and installing the product Sharp edges could cause injury be especially careful of the case edges and the fins on the condenser and evaporator For installation always contact the dealer or an Authorized service center There is risk of fire electric shock e...

Page 4: ...ter the product There is risk of fire electric shock or product damage Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock Turn the main power off when cleaning or maintaining the product There is risk of electric shock When the product is not be used for a long time disconnect the power supply plug or turn off the breaker The...

Page 5: ...y A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage Do not insert hands or other object through air inlet or outlet while the product is operated There are sharp and moving parts that could cause personal injury Do not drink the water drained from the product It is not sanitary could cause serious health issues Use a firm stool or ladder whe...

Page 6: ...Restarting is for approx 3 minutes Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Room temperature sensor Pipe temperature sensor Indoor unit Operation by remote controller Sensing by room temperature Room temperature control Anti freezing control in cooling Time Delay Safety control Indoor fan speed control Two direction air vane Sleep mode...

Page 7: ...y at operation mode Hydrophilic aluminum fin It is only operated in the heating operation mode except defrosting operation Anti rust cabinet Valve protection cover 4 way valve control Made from electrolytic zinc steel sheet and anti rust coated components Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly Discharge pipe temperature protect Heating cable Optio...

Page 8: ... D 9K 795 270 165 12K 845 286 165 18K 995 292 194 24K 1180 320 200 Outdoor unit Dimension Model W H D L1 L2 9K 12K Cooling 780 540 250 549 266 9K 12K Cooling Heating 18K Cooling 760 590 290 530 315 18K Cooling Heating 845 695 335 560 360 24K 895 860 330 560 360 ...

Page 9: ...put W 680 855 Rated current RLA A 4 7 5 3 Locked rotor Amp LRA A 10 10 Thermal protector CS 74 INT01L 4639 CS 74 Thermal protector position internal EXTERNAL Capacitor uF 35 35 Refrigerant oil oil charge ml ESTER OIL VG74 370 ml ESTER OIL VG74 480 Indoor fan motor Model RPG20B RPG20B Brand Welling Welling Input W 43 43 Capacitor uF 1 5 1 5 Speed Hi Mi Lo r min 1100 1000 850 1100 1000 850 Indoor co...

Page 10: ...mension W D H mm 780x250x540 760x285x590 Packing W D H mm 910x335x575 887x355x645 Net Gross weight kg 30 5 33 39 5 42 5 Refrigerant type g R410A 740g R410A 1000g Design pressure MPa 4 2 1 5 4 2 1 5 Refrigerant piping Liquid side Gas side mm inch φ6 35 φ9 53 1 4 3 8 φ6 35 φ9 53 1 4 3 8 Max refrigerant pipe length m 20 20 Max difference in level m 8 8 Connection wiring 1 5 Optional 1 5 Optional Plug...

Page 11: ...639 CS 74 Thermal protector position internal EXTERNAL Capacitor uF 35 35 Refrigerant oil oil charge ml ESTER OIL VG74 370 ml ESTER OIL VG74 480 Indoor fan motor Model RPG20B RPG20B Brand Welling Welling Input W 43 43 Capacitor uF 1 5 1 5 Speed Hi Mi Lo r min 1250 1000 900 1250 1000 900 Indoor coil Number of rows 2 2 Tube pitch a x row pitch b mm 21x13 37 21x13 37 Fin spacing mm 1 3 1 3 Fin type c...

Page 12: ...kg 33 35 5 35 37 Refrigerant type g R410A 1050g R410A 1100g Design pressure MPa 4 2 1 5 4 2 1 5 Refrigerant piping Liquid side Gas side mm inch φ6 35 φ12 7 1 4 1 2 φ6 35 φ12 7 1 4 1 2 Max refrigerant pipe length m 20 20 Max difference in level m 8 8 Connection wiring 1 5 Optional 1 5 Optional Plug type 1 5x3 Brazil 1 5x3 Brazil Thermostat type Remote control Remote control Operation temp 17 30 17 ...

Page 13: ...otector 1NT11L 3979 1NT11L 3979 Thermal protector position Internal Internal Capacitor uF 35 35 Refrigerant oil oil charge ml FV50S 400 FV50S 400 Indoor fan motor Model RPG28H RPG28H Brand Welling Welling Input W 58 5 58 5 Capacitor uF 1 5 1 5 Speed Hi Mi Lo r min 1250 1100 1000 1250 1100 1000 Indoor coil Number of rows 2 2 Tube pitch a x row pitch b mm 21x13 37 21x13 37 Fin spacing mm 1 3 1 3 Fin...

Page 14: ...ight kg 40 43 50 5 54 5 Refrigerant type g R410A 1100g R410A 1700g Design pressure MPa 4 2 1 5 4 2 1 5 Refrigerant piping Liquid side Gas side mm inch φ6 35 φ12 7 1 4 1 2 φ6 35 φ12 7 1 4 1 2 Max refrigerant pipe length m 25 25 Max difference in level m 10 10 Connection wiring 2 5 Optional 2 5 Optional Plug type 2 5x3 2 5x3 Thermostat type Remote control Remote control Operation temp 17 30 17 30 Am...

Page 15: ... A 12 5 12 5 Thermal protector 1NT11L 3979 1NT11L 3979 Thermal protector position Capacitor uF 35 35 Refrigerant oil oil charge ml 350 350 Indoor fan motor Model YDK38 4CB YDK38 4CB Brand Welling Welling Input W 72 66 58 72 66 58 Capacitor uF 3 3 Speed Hi Mi Lo r min 1250 1200 1100 1250 1200 1100 Indoor coil Number of rows 2 2 Tube pitch a x row pitch b mm 21x13 37 21x13 37 Fin spacing mm 1 3 1 3 ...

Page 16: ...cking W D H mm 1043x395x915 1043x395x915 Net Gross weight kg 63 5 67 5 63 5 67 5 Refrigerant type g R410A 1850g R410A 1900g Design pressure MPa 4 2 1 5 4 2 1 5 Refrigerant piping Liquid side Gas side mm inch φ9 53 φ16 0 3 8 5 8 φ9 53 φ16 0 3 8 5 8 Max refrigerant pipe length m 25 25 Max difference in level m 10 10 Connection wiring Plug type Thermostat type Remote control Remote control Operation ...

Page 17: ...Service manual 16 5 Refrigerant cycle diagram Cooling only mode Heat pump mode ...

Page 18: ...ling operation Heating operation Drying operation Room temperature 17 32 17 27 10 32 Outdoor temperature 18 50 15 34 10 50 15 43 For the models with low temperature cooling system 7 Wiring diagram MWVT09S MWHVT09S MWVT12S MWHVT12S MWVT18S MWHVT18S Indoor unit ...

Page 19: ...Service manual 18 MRVT09AS MRVT12AS Outdoor unit ...

Page 20: ...Service manual 19 MRHVT09AS MRHVT12AS Outdoor unit ...

Page 21: ...Service manual 20 MRVT18AS MRHVT18AS Outdoor unit ...

Page 22: ...Service manual 21 MWVT24S MWHVT24S Indoor unit ...

Page 23: ...Service manual 22 MRVT24AS Outdoor unit ...

Page 24: ...Service manual 23 MRHVT24AS Outdoor unit ...

Page 25: ...specifications sheet Grade Unit 9K 12K 18K 24K mm 2 1 5 1 5 2 5 2 5 8 3 Pipe length and the elevation Capacity Btu h Pipe size Standard length m Max Elevation B m Max Length A m Additional refrigerant g m Gas Liquid 9k 3 8 Ф9 52 1 4 Ф6 35 5 8 20 20 12k 1 2 Ф12 7 1 4 Ф6 35 5 8 20 20 18K 1 2 Ф12 7 1 4 Ф6 35 5 10 25 30 24K 5 8 Ф16 0 3 8 Ф9 52 5 8 15 40 Caution Capacity is base on standard length and ...

Page 26: ... the flare connection for gas leakage 4 Purge the air from the system 5 Set the 2 way valve to the open position and remove the cap from the 3 way valve s service port 6 Using the hexagonal wrench to press the valve core pin discharge for three seconds and then wait for one minute 7 Use torque wrench to tighten the service port cap to a torque of 1 8 kg m 18n m 8 Set the 3 way valve to the opened ...

Page 27: ... charge hose with the push pin to the gas service port 4 Air purging of the charge hose Open the low pressure valve on the charge set slightly to purge air from the charge hose 5 Set the 2 way valve to the close position 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 7 Immediately set the 3 way valve to the closed position Do this quickly so that the...

Page 28: ...minutes repeat 3 times 6 After purging the air use a torque wrench to tighten the flare nut to on the 2 way valve 7 Check the gas leakage 8 Check the flare connections for gas leakage 9 Discharge the refrigerant 10 Close the valve on the charging cylinder and discharge the refrigerant until the gauge indicate 0 3 to 0 5 Mpa 11 Disconnect the charge set and the charging cylinder and set the 2 way a...

Page 29: ...the service port 3 Open the valves Low side on the charge set and discharge the refrigerant until the gauge indicates 0 05 to 0 1 Mpa If there is no air in the refrigeration cycle the pressure when the air conditioner is not running is higher than 0 1Mpa discharge the refrigerant until the gauge indicates 0 05 to 0 1 Mpa If this is the case it will not be necessary to apply a evacuation Discharge ...

Page 30: ...e has moved toward 0 1 Mpa 76 cmHg vacuum of 4 mmHg or less 3 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil if the vacuum pump oil becomes dirty or depleted replenish as needle ...

Page 31: ...he specified amount of refrigerant if can be charged with a little at a time approximately 150g each time0 while operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure pumping down pin 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the refrigerant to be...

Page 32: ...in AUTO operation TIMER indicator This indicator illuminates when TIMER is set ON OFF IONIZER CLEAN AIR indication lamp Lights up when CLEAN AIR feature is activated and Ionizer can generate abundant anions to fill the room with refreshing and natural air PRE DEF indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is ac...

Page 33: ...er than 90 9 3 5 Inverter module Protection Inverter module Protection itself has a protection function against current voltage and temperature If these protections happened the corresponding code will display on indoor unit LED 9 3 6 Sensor protection at open circuit and breaking disconnection 9 3 7 Fan Speed is out of control When Indoor Fan Speed is too low lower than 300RPM for 60 seconds the ...

Page 34: ...rting if T stays in a zone for 3 minutes the frequency will change as follow Zone A Current frequency rise a grade till the maximum grade F8 Zone B Keep the current frequency of compressor Zone C Descend the current frequency of compressor until F1 Zone D Compressor stops after running as the minimum frequency F1 for 60 minutes or T is less than 2 9 5 2 Indoor heat exchanger anti freezing function...

Page 35: ...t frequency to a higher grade Indoor fan turns to turbo speed After running for 30 minutes the machine will turn back to previous setting mode 9 6 6 Indoor fan operation rule In cooling mode indoor fan runs all the time and the speed can be selected as high medium low and auto Auto fan in cooling mode acts as follow 9 5 7 Condenser high temperature protection function in cooling and drying mode If...

Page 36: ...t anti cold wind function is preferential Auto fan action in heating mode 9 7 3 After starting the operation frequency of compressor submits to following rule When the machine runs if Th stays in a zone for 3 minutes action of frequency is as follow Zone A Elevate the current frequency one grade and not stop until the maximum grade Zone B Keep the current frequency Zone C Descend the current frequ...

Page 37: ... 2 If T4 0 The program judges according to the condition 1 if the two items are satisfied then judges if T2 has descended for more than 5 if it has the machine starts defrosting or continues to judge T2 and will not defrost until T2 drops more than 5 Condition 3 No matter what value T4 is if the machine runs with T3 3 for more than 120 minutes and T3 keeps lower than 2 for more than 3 minutes the ...

Page 38: ... speed the frequency of compressor will be fixed as rating value Any condition of above is not satisfied the machine can not be turned into rating capacity test mode The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature 9 7 9 Turbo function in heating mode press the TURBO button on remote controller on off on off on off on off ...

Page 39: ... cooling and auto function can carry out with a touch button In these two modes the machine can be changed by remote controller to any other mode at any moment 9 9 2 When the machine is off pressing the touch button will carry the machine to forced auto mode after this if pressing the button once again within 5 seconds the machine will turn into forced cooling mode In forced auto forced cooling or...

Page 40: ...tion mode 9 13 1 Operation time in sleep mode is 7 hours After 7 hours the machine quits this mode and turns off 9 13 2 In cooling heating or auto mode sleep function is available 9 13 3 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...

Page 41: ...hen the aircon receives the CODE again It s a circle After starting the Clean Air function the ionizer can work only when the indoor fan motor is running If the indoor fan motor is off the ionizer also stops working even though the Clean Air function is available Switching the running mode will not stop the ionizer When turning off the aircon the ionizer is also turned off 9 17 Self clean function...

Page 42: ...ssor is as following At cooling mode if TA TS compressor is off If TA TS compressor is on At heating mode if TA TS compressor is off If TA TS compressor is on The PCB will take action to the mode change information from remote controller signal but it will not affected by the setting temperature When the unit is running with follow me function if the PCB doesn t receive any signal from remote cont...

Page 43: ...re are capacitors in PCB and relative circuit in outdoor unit even shut down the power supply electricity power still are kept in capacitors do not forget to discharge the electricity power in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION Bulb 25 40W ...

Page 44: ...nser temperature sensor E6 Open or short circuit of indoor room or evaporator temperature sensor P0 Inverter module IGBT over strong current protection P1 Over voltage or too low voltage protection P2 Temperature protection of compressor top P4 Inverter compressor drive error Note E4 P3 Reserved function 10 2 Diagnosis and Solution 10 2 1 E0 EEPROM parameter error error diagnosis and solution Circ...

Page 45: ...of L N S and GND good Is the GND connection on outdoor PCB good NO NO Reconnect and retest again Is the LED4 red on outdoor PCB bright and LED1 yellow blinking Replace outdoor e box Yes Yes The power supply for outdoor PCB is fail Check the wiring on outdoor PCB comparing with wiring plate Is the connection good No Correct the connection Yes No Replace indoor PCB and repower on Is the failure clea...

Page 46: ...the failure cleared NO YE Check the compressor NO Is the indoor temperature and evaporator sensor connector and connection good Repair the connector and reconnect Replace the sensor and check if E6 display again NO YES Replace the indoor PCB YES Is the outdoor temperature sensor connector and connection good Repair the connector and reconnect Replace the sensor and check if E5 display again NO YES...

Page 47: ...esistance of inverter compressor is it 0 668ohm YES Replace inverter compressor Reconnect and retry NO NO Is the power supply good Be sure the power supply is normal when using the units NO YES Replace the outdoor e box YES Does compressor operate Is the connection good Is refrigerant circulation volume normal NO NO Charge refrigerant Is abnormality the same after gas charging NO Check refrigerant...

Page 48: ...easure the resistance value of each winding by using the multi meter Some frequently used R T data for T1 T2 T3 and T4 sensor Temperature 5 1 0 1 5 2 0 2 5 3 0 4 0 5 0 6 0 Resistance Value KΩ 2 6 9 2 0 7 1 6 1 1 2 6 1 0 8 5 2 3 5 2 4 Some frequently used R T data for Te sensor Temperature 5 1 5 25 35 60 70 80 9 0 1 00 Resistance Value KΩ 14 1 6 8 8 5 6 1 3 6 6 1 3 8 9 7 6 9 5 3 7 KΩ ...

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