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Premium PAC12028A Service Manual Download Page 44

Service manual 

 

                            - 41 - 

11 Troubleshooting 

11.1 Display board 

 

Operation 

The indicator flashes once every second after power is on and illuminates when the air conditioner is in 

operation. 

Timer indicator: 

The indicator illuminates then TIMER is set ON. 

PRE-DEF. indicator (For cooling & heating mode only) 

The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating. 

At this time, PRE-DEF. indicator illuminates. 

Auto indicator: 

This indicator flashes when the air conditioner is in AUTO operation. 

ECON indicator 

This indicator illuminates while the air conditioner is in economic operation. 

 

Summary of Contents for PAC12028A

Page 1: ...PAC9028A PAC9029B PAC12028A PAC12029B PAC12038A PAC12039B PAC18028A PAC18029B PAC24028A PAC24029B ...

Page 2: ...es 27 8 8 Evacuation 28 8 9 Gas charging 29 9 Electronic function 30 9 1 Electronic control working environment 30 9 2 Proper symbols and their meaning 30 9 3 Function 31 9 4 Protection 31 9 5 Fan only mode 32 9 6 Cooling mode 32 9 7 Dehumidifying mode 33 9 8 Heating mode 33 9 9 Defrosting mode available for heating mode 34 9 10 Auto mode 35 9 11 Force cooling function 35 9 12 Sleep mode Economic ...

Page 3: ...ontrol 45 11 6 Temperature sensor error 46 11 7 Over current protection of the compressor occurs 4 times 46 11 8 EEROM error 46 11 9 Outdoor unit protects 47 11 10 Indoor unit communication error 47 12 Characteristic of temperature sensor 48 ...

Page 4: ...aker of fuse There is risk of fire or electric shock Do not modify or extend the power cable There is risk of fire or electric shock Do not 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 c...

Page 5: ...ctric shock Do not open the inlet grill of the product during operation Do not touch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failure When the product is soaked flooded or submerged contact an Authorized service center There is risk of fire or electric shock Be caution that water could not enter the product There is risk of fire...

Page 6: ...of personal injury Do not step on pr put anything on the product outdoor units There is risk of personal injury and failure of product Always insert the filter securely Clean the filter every two weeks or more often if necessary A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage Do not insert hands or other object through air inlet or outlet ...

Page 7: ...be set at the desired position or swing up and down automatically 13 Auto mode The unit can be change by the room temperature 14 Anti cold function Prevent the cold wind at the beginning of unit start 15 Temp Compensation 16 Defrost mode 17 Auto restart function 18 Flexible wiring connection 19 Easy clean panel 20 Ionizer optional The function is operated by remote controller 21 Follow me optional...

Page 8: ...Service manual 5 3 Dimension Indoor unit Dimension Mode W H D 9K 790 265 195 12K 920 292 225 18K 1080 330 225 24K 1250 325 230 ...

Page 9: ...Service manual 6 outdoor unit Dimension Mode W H D L1 L2 9K 780 540 250 549 276 12K 760 590 285 530 290 18K 845 695 335 560 335 24K 895 860 330 590 333 ...

Page 10: ... 1250 1000 800 1250 1000 800 1270 1100 1000 1270 1100 1000 m3 h 580 500 420 580 500 420 800 730 600 800 730 600 dB A 40 34 27 40 34 27 44 40 36 44 40 36 Model YDK23 6A YDK23 6A YDK23 6A YDK23 6A Brand DY DY DY DY Input W 77 77 77 77 Capacitor F 6 F 250V 6 F 250V 6 F 250V 6 F 250V Speed r min 880 880 880 880 m3 h 1800 1800 1850 1850 dB A 53 53 55 55 g R410A 1050 R410A 1070 R410A 1330 R410A 1350 MPa...

Page 11: ... 450V 3 0 F 450V Speed hi mi lo r min 1270 1100 1000 1270 1100 1000 1285 1235 1145 1045 1285 1235 1145 1045 m3 h 800 730 600 800 730 600 1150 1080 1020 960 1150 1080 1020 960 dB A 44 40 36 44 40 36 50 47 44 50 47 44 Model YDK36 6B YDK36 6B YDK53 6KB YDK53 6KB Brand Welling Welling Welling Welling Input W 85 85 172 172 Capacitor F 2 5 F 450V 2 5 F 450V 3 F 450V 3 F 450V Speed r min 930 930 840 840 ...

Page 12: ... 1100 990 1260 1100 990 dB A 1350 1200 1090 1350 1200 1090 Model 52 48 45 52 48 45 Brand YDK100 6EB YDK100 6EB Input W Welling Welling Capacitor uF 140 140 Speed r min 4 F 450V 4 F 450V m3 h 760 760 dB A 2500 2500 g 59 59 MPa R410A 2400 R410A 2450 Liquid side Gas side mm 4 5 4 5 Max refrigerant pipe length m 9 53 16 9 53 16 Max difference in level m 20 20 10 10 17 30 17 30 m2 18 45 7 45 Model Powe...

Page 13: ...Service manual 10 5 Refrigerant cycle diagram Cooling only Heat pump mode ...

Page 14: ...lt from the continuous operation under constant air temperature conditions However excludes the initial pull down stage Heating operation Indoor air temp DB Outdoor unit air temp DB Note The chart is the result from the continuous operation under constant air temperature conditions However excludes the initial pull down stage ...

Page 15: ...nit 0 1 2 1 324 5 4 6 7 8 4 1 0 0 9 0 9 8 2 5 4 4 4 1 5 4 1 7 4 A 0 5 8 6 4B5 4 0 9 C D 6 7 EGF9H IGJ K I JML NGO PRQ SAT9U VXWMY Z J VA 9 G V8 _ Ia WA 9b c dMe fhg ij5 4 k 6 2 l 7 m n io5 4D p qor s t M M k 6 2 Dl k 6 2i 5 4 7Am n uwv1x y z Au u9 G 2 X C 8 1 7 m n 7 m n 1 ...

Page 16: ... 2 2ª 2ª w G w w ª ª ª ª 2 R ª ª 2 ª ª ª 2 ª ª µ ª 2 2 2 ª ª ª 2 2 ºD D À Á ÂRÃ Ä ÅDÆ Ç 1ÈÊÉ Ë Ì Í Î Ë Ï ÐÒÑ ËDÏ Ó Ô Ì ÑGÕ ÖÒ GØ Ù Ú Û Ü Ý Þ Û Ü2 Ý Ü Û 2Þ ß à á â ãåä2æ2ß ß ç è é êìëGí1î ê êAïñð íòë é ó ôöõ ø ø ù úDû ü Ü2 RÝ ý ª þ Ü ÿ ÿ DÓ Ï 2Ñ Û 2Þ Þ Å Æ Ü Ý ý ª þ Ü ...

Page 17: ...5 4 6 7 8 4 1 0 0 9 0 9 8 2 5 4 4 4 1 5 4 1 7 4 A 0 5 8 6 4B5 4 0 9 C D 6 7 13254 637 8 6 7 9 3 BA5C DFE GIH 7 DBJ5K3L D JNM 6PO EBL5Q R S T UWV ij5 4 k 6 2 l 7 m n io5 4D X Y Z M M k 6 2 Dl k 6 2i 5 4 7Am n _ba c dfe gB 5h3i j kml npoFkqksrutpn l j vbw x y z z 7 m n 7 m n 1 ...

Page 18: ...tdoor unit N q s F s s q s q q P p q q q s I ª3 ª3 s q b µ º ª À Á 3Â Ã Ä3Å Æ Ç Èp p É sÊ Ë IÈ É Ê É È Ë ÌbÍ ÎsÏ ÐÒÑ Ó Ì Ì Ô Õ Ö ÙØ ÚbÛ ÜÞÝ Ú Ø Ö ßpàâá ã ä ä å æ ç è É sÊ é ê É ëBì í ë ì î ï Àp ï ð ñóò ô IÈ Ë Ë sõ ö øùú øû üý þ û ú øû þ Ép q Ê é ê É ...

Page 19: ...r unit Outdoor unit ÿ 0 1 2 3 3 1 4 5 5 6 7 8 9 0 1 5 5 3 0 2 ACBED AEB2F GCH IKJ LNM2O PCQ3RTS B P1UEVCW PNU4X AZY Q W3 E 3 _Z 9 aE 0 b 0c d e 9 a f g h i0j 3 3 b 0c 9 aE b 5 0d e k4l m nNoqp r0k k3s t u v w xzy vTvK zx1w u d e d e z b 5 1 ...

Page 20: ...4 4 4 z ª ª z T T T T K T ª ª ª 0 µ C º T À Á0Â Ã0Ä Å Á Æ Ç È Á Æ ÉËÊ Ì ÂËÈ Í ÎËÏCÐNÑ Ò ÓTÔzÕ Ö Ø Ù ÚKÛ Ü Ý Þ ß ÓTÔzÕ Ö à zá à zá Ø Ù Ú Û Ü Ø Ù â ÓTÔ Õ Ö Ý Þ ß ã ä0å æ çéè ê ã ã ë ì í î ï ð ñ î1îNòôó ð1ï í õ öø 0ù ú ú û ü0ý þ Ø Ùzâ ØzÙ â ÿ ÿ 0ÉKÆ KÈ ÓTÔzÕÖ Ý ÞKß Ý ÞKß Ê ...

Page 21: ...x x grg m i s i x q m j x i t i k3t g x sal s i m i s i x q m j x i t i k3t g x z u q m i xr 3l3k q s fr t g3fr i m t f g k k iaf m g xrt R R a a 3 6 r 3 r 3 L r ª Outdoor unit µ º 3 3 À º Á Â Ã Á Ä _º µ Á Á ÆÅÇ 3 È º Á Â Â Á º Á Â Â Á Á µ ÁÄ µ ÁÄ 3 L Á É ÃrÊ Ë Á º Å º Å_ Á º 3 Å _ Á µ Á Á Ì µ Á Á Â Á º Á È Â À Â L Á Â Í Î Ï Í Î Ï Í Î Ï ÐÒÑ À º Ó Ô3Õ Ö Ó Ô Õ Ö ØaÙ Ú3Û Ø Ù Ú Û ØaÙ Ú Û Ø Ù Ú Û Ø Ù Ú...

Page 22: ...B N TU U G V H W J U BJ 4 B N J R _3 ba c4d e f4dhgUijd iUklc mUf k nDoqpZp r s t r uvxwyu z zDu w 6 Outdoor unit Z y A Z R l y R l A 6 j Z A y 6 y 6 A b A y I 6 j 1 1 1 Z 6 q Z 6 Z 6 y Z 6 y D L 1 1 1 1 1 1 R S U j Z Z D 6 6 Z 1 6 j Z D y Z y y y 1 6 j 1 6 y 6 1 Z 1 6 0 6 y R ª R yª I ª l y j y Z 1 1 y 1 Z Z 1 Z Z U µy D yµ Z U µ U yµy y U µ1 Z 6µy Z yµy 1 ºZ ºy D 1 Z Z 1 y Z 1 Z R l ZºR ÁÀ Â Ã À...

Page 23: ...Service manual 20 MSE 24CRN1 MQ8W Indoorðððð Outdoorðððð ...

Page 24: ...Service manual 21 MSE 24HRN1 MQ8W Indoorðððð same with the indoor wiring diagram Of MSE 24CRN1 MQ8W Outdoorðððð ...

Page 25: ...power cord of connect should be selected according to the following specifications sheet Amp 10 15 20 mm2 1 0 1 5 2 5 Grade 8 3 Pipe length and the elevation Standard length Max Max Additional m Elevation Elevation refrigerant Btu h GAS LIQUID B m A m g m 3 8 9 52 1 4 6 35 5 5 10 30 1 2 12 7 1 4 6 35 5 5 10 30 18K 1 2 12 7 1 4 6 35 5 8 15 30 24K 5 8 15 88 3 8 9 52 5 10 20 65 Pipe size 9K 12K Capac...

Page 26: ... torque wrenches wrench to hold the joints and gas leak detector Note The air in the indoor unit and in the piping must be purged If air remains in the refrigeration piping it will affect the compressor reduce the cooling capacity and could lead to a malfunction of unit Be sure using a torque wrench to tighten the service port cap after using the service port so that it prevents the gas leakage fr...

Page 27: ...en 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 position 9 Mounted the valve stem nuts to the 2 way and 3 way valves 10 Check for gas leakage 11 At this time especially check for gas leakage from the 2 way and 3 way stem nuts and from the service port Caution If gas leakage is discovered in step 3 above ta...

Page 28: ... 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 29: ...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 30: ...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 31: ...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 32: ...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 33: ... temperature TE3 Anti cold wind from Setting Fan Speed to Breeze temperature TE4 Anti cold wind from Breeze to Fan Off temperature TE5 Evaporator low temperature protection entering temperature TE6 Evaporator low temperature protection restoring temperature TE7 Evaporator high temperature protection compressor off temperature TE8 Evaporator high temperature protection fan off temperature TE9 Evapo...

Page 34: ...ction 9 4 3 Fan Speed is out of control When Indoor Fan Speed is too high higher than High Fan 300RPM or too low lower than 400RPM the unit stops and LED displays failure information and can t returns to normal operation automatically 9 4 4 Cross Zero signal error warning If there is no Cross Zero signals in 4 minutes the unit stops and LED displays failure information and can t returns to normal ...

Page 35: ...ng mode The 4 way valve is closed at cooling mode The action of the compressor and the outdoor fan T indoor temperature Auto fan at cooling mode Anti freezing control to indoor evaporator at cooling mode T evaporator temp Condenser high temperature protection only for heat pump ...

Page 36: ...delay in dehumidifying mode 9 8 2 Generally the outdoor fan is turned off with the on off action of compressor in heating mode except for the defrosting mode or the end of defrost 9 8 3 Action of compressor and outdoor fan motor at heating mode compressor must run for 7 minutes after starting and then judge temperature Meanwhile other protections are still valid This parameter can be changed from ...

Page 37: ...emp The louver opens to Standard Angle ANGLHEAT when power is on for the first time 9 9 Defrosting mode available for heating mode 9 9 1 Defrosting condition Defrost starts when either of the following 1 2 1 T3 lower than 0 C lasts for more than 40 minutes and during this period T3 is lower than 3 C consecutively reaches 3 minutes 2 Calculate from the end of latest defrost evaporator high temp pro...

Page 38: ...to the temperature difference between room temperature TA and set temperature TS 9 10 2 The indoor fan blows automatically in corresponding selected modeñ 9 10 3 The motion of indoor fan s blade should accord with the selected operation modeñ 9 10 4 One mode should be carried out for at least 15 minutes once selected If the compressor cannot start for 15 minutes reselect the operation mode accordi...

Page 39: ...force cooling and forced auto mode It transfer between these two modes by pressing the buttons the cycling order of the button press is as below graph show to you 9 12 Sleep mode Economic mode 9 12 1 The sleep function is available at cooling heating or auto mode 9 12 2 Cooling The set temperature rise 1 per hour Two hours later the set temperature will maintain as a ó constant and the fan speed i...

Page 40: ...g condition occur a mode changed b get into Force Cooling mode c turn off the air conditioner 9 14 3 Sleep mode is not available in this mode 9 15 Ionizer air clean function 9 15 1 Ionizer air clean function is effected when the unit is working and controlled by the remote controller 9 15 2 This function is active when the unit received the signal from the remote controller first time and inactive...

Page 41: ...Service manual 38 9 16 3 When the indoor unit have not received the corrected signal for 7 minutes this function will be shut down The air conditioner is working in common way ...

Page 42: ...0 1270 CSPEEDH 1250 1270 1270 CSPEEDM 1000 1100 1100 CSPEEDL 800 1000 1000 CSPEEDS 700 900 900 TE1 31 31 31 TE2 34 33 33 TE3 30 27 27 TE4 22 20 20 TE5 4 5 5 TE6 10 12 12 TE7 60 62 62 TE8 54 54 54 TE9 48 48 48 ANGLRANGE 185 160 160 ANGLOFF 106 0 0 ANGLCOOL 160 50 50 ANGLHEAT 30 78 78 ANGLCSL 30 35 35 ANGLCSH 55 60 60 ANGLHSL 30 63 63 ANGLHSH 55 78 78 ANGLDL 30 10 10 ANGLDH 160 78 78 ANGLFL 55 78 78...

Page 43: ... 1 ö AngleDefH 1 ö AngleMotorOn ý ú ö AngleStep þ1ô ö AngleLouver 1 ö AngleTime 1ô ö IResume ú þ ö I5min ÿ6ûIö I3sec ö IOFan jý ö Idefrost 1 ö TE1 þDõIö TE2 þIüDö TE3 þ Dö TE4 þ1ý ö TE5 ø1ø ö TE6 ø ù ö TE7 û Dö TE8 û ö TE9 û ø ö TE10 ô1 ö TE11 û ö TE12 û6 ö TE13 û6ô ö TE14 þIüDö TE15 û ö TE16 ý ú ö TC1 IüDö TC2 þ1ý ö TC3 IÿDö DefrostTimeL ôDõIö DefrostTimeH 1þ ö ...

Page 44: ...dicator illuminates then TIMER is set ON PRE DEF indicator For cooling heating mode only The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating At this time PRE DEF indicator illuminates Auto indicator This indicator flashes when the air conditioner is in AUTO operation ECON indicator This indicator illuminates while the air conditioner is in economic opera...

Page 45: ...perature sensor is open circuit or short circuit illumine alternately Extinguish Flash at 5Hz For 18K Failure phenomenon Operation lamp Timer lamp Defrosting lamp Auto lamp Over current protection of the compressor occurs 4 times Indoor room temp sensor is open circuit or short circuit X X X Temp sensor on indoor evaporator is open circuit or short circuit X X X Temp sensor on outdoor condenser is...

Page 46: ...eck if AC 12V and AC 35V 5 exist at second coil of transformer in the outdoor PCB Outdoor PCB is defective Yes Yes No Take off the secondary plug of transformer and then check if AC 12V and AC 35V 5 exist at secondary coil of transformer No Transformer is defective No Check if DC 35V exists between 2 and 3 on the indoor terminal and DC 12V between 3 and 4 No Indoor PCB is defective Check if DC 35V...

Page 47: ...imary coil of outdoor and indoor transformer Check if AC 12V exist at second coil of outdoor and indoor transformer Outdoor or indoor PCB is defective Yes Yes No Take off the secondary plug of transformer and then check if AC 12V exist at secondary coil of outdoor and indoor transformer No Outdoor or indoor transformer is defective Yes Yes Outdoor or indoor PCB is defective No Yes No Change good o...

Page 48: ...ically entering to the status when power is on The reason is that the instantaneous voltage of main chip is less than 4 5V Check according to the following procedure 11 5 Indoor fan speed out of control Just for 9K and 12K type when indoor fan speed has been out of control for over 1 minute ...

Page 49: ...ncluding the indoor room indoor evaporator and outdoor condenser temperature sensor 11 7 Over current protection of the compressor occurs 4 times 11 8 EEROM error EEROM error indoor PCB is defective Over current protection of compressor occurs 4 times ...

Page 50: ...heck if the error is still exit Connect the signal wire well or change the signal wire if it s the problem of the wires No Yes Indoor PCB failure No Outdoor PCB failure change outdoor PCB Yes Check if the power supply is good Change outdoor PCB and check if the error is still exit Power supply failure No Yes Outdoor PCB failure No Compressor failure Yes ...

Page 51: ...9 25 10 52 3 1918 1 37 1988 26 9 5507 53 3 0707 0 35 2024 27 9 1245 54 2 959 1 33 3269 28 8 7198 55 2 8442 2 31 5635 29 8 3357 56 2 7382 3 29 9058 30 7 9708 57 2 6368 4 28 3459 31 7 6241 58 2 5397 5 26 8778 32 7 2946 59 2 4468 6 25 4954 33 6 9814 60 2 3577 7 24 1932 34 6 6835 61 2 2725 8 22 5662 35 6 4002 62 2 1907 9 21 8094 36 6 1306 63 2 1124 10 20 7184 37 5 8736 64 2 0373 11 19 6891 38 5 6296 6...

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