SERVICE MANUAL
Contents
1. torrent nett nacre sabes 25 8 12 Timer friction aciem ere Ree e peal nba lege RR A e eee SV MEAN EO qe In suka ua 26 8 13 Sleep function mode cer mee ite dr ae REL WEE naden de eee Het vd 26 8 14 Auto Restart furictioni nne eie eter Eee 26 9 Tro bleshooting nne verser 27 91 Indoor Unit Error Display ener ricette chet goes uer e kneden 28 9 2 Diagnosis and Sol tion EX ere Ede n 29 9 3 ne tete ue Ree Aire 32 1 Precaution 1 1 Safety Precaution W To prevent injury to the user or other people and property damage the following instructions must be followed W incorrect operation due to ignoring instruction will cause harm or damage W Before service unit be sure to read this service manual at first 1 2 Warning Installation W Do not use a defective or underrated circuit breaker Use this appliance on a dedicated circuit There is risk of fire or electric shock W For electrical work contact the dealer seller a qualified electrician or an Authorized service center Do not disassemble or repair the product there is risk of fire or electric shock W Always ground the product There is risk of fire or electric shock W install the2. Bpo ANIVA H3SN3QNOO 1V3H 381 Adv Tlldvo epo JAVA 393H9 1 3015 dinon HO1VHOdV 3 1V3H HOOQNI 6 Wiring diagram 6 1 Indoor Unit 95 3414 OPTIONAL MICRO SWITCH DISPLAY BOARD INDOOR UNIT OUTDOOR UNIT 6 2 Outdoor Unit HEAT EXCHANGER SENSOR OPTIONAL HEATER 1 BLACK Pd N 2 Ee 1 1 i 1 1 HEATER 2 ABIENT SR RARA HEATER 2 WHITE mam OO O D KE i HEATER 1 CN31 D V ee as Im 4 DISCHARGE SENSOR DR rd 4 OUTDOOR pem BROWN BLUE YIG 1 I I 1 1 I I 1 D l CPI 919191 1 GD 1 N 5 amp a i l 1 l 1 I I 1 DRONN YIG TO INDOOR UNIT POWER SUPPLY 7 FAN E 2 FELLOW REACTOR R6025 Lc jen REACTOR R1815 1 AT ORANGE BLUE BLUE OUTDOOR WIRING DIAGRAM Sor CAPACITOR I I I I I I J I A am I L eres I I I I I I I 10 T Installation details 7 1 Wrench torque sheet for installation Outside diameter 7 2 Connecting the cables The pow
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4. W Do not drink the water drained from the product It is not sanitary could cause serious health issues m Use a firm stool or ladder when cleaning or maintaining the product Be careful and avoid personal injury W Replace the all batteries in the remote control with new ones of the same type Do not mix old and mew batteries or different types of batteries There is risk of fire or explosion W Do notrecharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode the liquid from the batteries gets onto your skin or clothes wash it well with clean The chemical in batteries could cause burns or other Do not use the remote of the batteries have health hazards leaked 2 Function Operation by remote controller Sensing by room temperature Room temperature sensor Pipe temperature sensor Room temperature control Maintain the room temperature in accordance with the setting temperature Anti freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Restarting is for approx 3 minutes Indoor fan speed control Turbo wind high med low breeze Two direction air vane The unit will decide the louver direction according to Timer function zt 2 3 Sleep mode auto control Self diag function The fan is turn to low speed cooli
5. wind function is available 3 f the machine runs in rating capacity test mode indoor fan runs with rating speed and anti cold wind is disabled 8 7 2 Indoor fan speed can be set as high medium low or auto grade but anti cold wind function is preferential Auto fan action in heating mode medium oom temp setting Temp N AT 8 7 3 After start the operation frequency of compressor submits to following rule room temp setting Temp ATh When the machine runs if ATh stays in a zone for 3 minutes action of frequency is as follow Zone Elevate the current frequency one grade and not stop until the maximum grade Zone B Keep the current frequency Zone Descend the current frequency one grade 22 Zone D Compressor stops after running with F1 for 60 minutes or when ATh gt 6 8 7 4 Outdoor unit current control in heating mode comp pause I3HEAT freq descends if curr rises I2HEAT freq remains if curr descends outdoor unit current MHEAT d running normally 8 7 5 Indoor heat exchanger high temperature protection If T2 gt 60 C the compressor will stop and not resume until 2 lt 48 9 7 6 Defrosting mode 1 Condition of defrosting Condition 1 If T4 gt 0 C When the units are running if the following two items are satisfied the units start defrosting a The units runs with T3 lt 3 C for 40 minutes and keeps lower than 6 C for more
6. Mid ea SSS Strategic Products and Services SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL MOUNTED TYPE MSRI 24HRDNI QC2W V1 0 Mar 2010 CONTENTS t Precaution nessen irre traderet pi IE 1 USE UN AIRE 1 1 2 A B 1 2 FUNCUOM ec 4 EET 6 3 1 ASL Rn 6 3 2 Outdoor 6 4 SpecificatiOM 22 20 7 5 Refrigerant cycle diagram ssnzsensnnnensievensnanrenne nein rdndnnnrvaandnantenne 8 6 Wiring diagram issiron aiiai dee sien edn hee 9 x Elide E MN 9 6 2 Outdoor Unit Ide Hd I e RH A ener end 10 7 Installation detalls rine N ete RR 11 71 Wrenchitorque sheetfor installatiOni petto dere deti dot 11 7 2 Connecting the cables x ita re nee TEE ERR ewe 11 7 3 Pipelength and the elevation eerie tne
7. amp drying mode including heating in auto mode including cooling in auto amp forced mode 8 11 3 Outdoor fan action in cooling amp drying mode including cooling in auto amp forced mode Please refer to the pic above 25 8 12 Timer function 8 12 1 Timing range is 24 hours and the minimum resolution is 15 minutes 8 12 2 Timer on After turning off the machine will turn on automatically when reaching the setting time 8 12 3 Timer off After turning on the machine will turn off automatically when reaching the setting time 8 12 4 Timer on off After turning off the machine will turn on automatically when reaching the setting on time and then turn off automatically when reaching the setting off time 8 12 5 Timer off on After turning on the machine will turn off automatically when reaching the setting off time and then turn on automatically when reaching the setting on time 8 12 6 The tolerance of Timer is 1 minute per hour 8 13 Sleep function mode 8 13 1 Operation time in sleep mode is 7 hours After 7 hours the machine quits this mode and turns off 8 13 2 cooling heating or auto mode sleep function is available 8 13 3 Operation process in sleep mode is as follow 1 After pressing ECONOMIC or SLEEP button on controller the machine will turn into sleep mode 2 When cooling the setting temperature rises 1 C be lower than 30 C every one hour 2 hour later the rising stops and indoor fan is fi
8. clogging of capillary etc 9 2 8 4 compressor drive error diagnosis and solution E ES Reconnect and retry Is the connection of compressor good Is the wiring sequence right The voltage range proper Replace the outdoor E box If the problem comes to again check coil resistance of inverter compressor is it riaht Replace inverter compressor 31 9 3 Key parts checking 9 3 1 Compressor checking Model DA150S1C 20FZ Measure the resistance value of each winding by using the multi meter Input Terminal Blue Resistance Value Blue 4 0 950 Red 20 C 2 Black 20 Black 3 Red 9 3 2 Outdoor Fan Motor Model YDK55 6G Measure the resistance value of each winding by using the multi meter Position Resistance Value Black Red 1910 20 C Red Yellow 1910 20 C Red Blue 2200 20 C 32 9 3 4 Temperature Sensors Room temp T 1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor exhaust temp Te sensor Measure the resistance value of each winding by using the multi meter Some frequently used R T data for T1 T2 T3 and T4 sensor mee cr m um ec 8 Some frequently used R T data for Te sensor Terrarec s s 9 1 Resano vane oy wis osx vee ve er 5
9. hexagonal wrench to operate the If the gas leaks do not stop when the connections are valve stem retightened repair the location of the leak discharge all 3 Check for gas leakage of the gas through the service port and then recharge Check the flare connection for gas leakage with the specified amount of gas from a gas cylinder 4 Purge the air from the system Set the 2 way valve to the open position and remove the cap from the 3 way valve s service port Using the hexagonal wrench to press the valve core pin discharge for three seconds and then wait for one minute 5 Use torque wrench to tighten the service port cap to a torque of 1 8 kgf m 18N m 6 Set the 3 way valve to the opened position 7 Mounted the valve stem nuts to the 2 way and 3 way valves 8 Check for gas leakage At this time especially check for gas leakage from the 2 way and 3 way stem nuts and from the service port 12 7 5 Pumping down Re installation CX side ES Outdoor unit f vive Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position Be sure to use a hexagonal wrench to operate the valve stems 2 Operate the unit for 10 to 15 minutes 3 Stop operation and wait for 3 minutes then connect the charge set to the service port of the 3 way valve Connect the charge hos
10. modes the machine be changed by remote controller to any other mode at any moment 8 9 2 When the machine is off pressing the touch button once the unit will enter forced auto mode When the machine is off pressing the touch button twice within 5s the unit will enter forced cooling mode When the unit is running at forced auto or forced cooling mode pressing the touch button continuously the unit will be turned off 8 9 3 In forced operation mode all general protections is available 8 9 4 In forced cooling mode the unit will run with fixed frequency F2 at low speed 30 minutes later the unit will turn to normal auto mode with setting temperature 24 8 9 5 In forced auto mode the unit will run with setting temperature 24 8 10 Action of 4 way valve In cooling drying fan only or turning off mode 4 way valve is off while in heating mode 4 way valve is on If the unit changes operation mode 4 way valve will be delayed off 2 minutes after compressor stop For defrosting please refer to the passage defrosting mode 8 11 Two speeds outdoor fan function 8 11 1 Outdoor fan starts at the same time with compressor but stops 30 seconds later after compressor stop 8 11 2 Outdoor fan action in heating mode including heating in auto mode 5 g o a o Q o E c E 5 5 s 5 5 9 9 S S B g 5 2 Outdoor fan action in heating mode Outdoor fan action in cooling
11. panel and the cover of control box securely There is risk of fire of electric shock W Always install a dedicated circuit and breaker Improper wiring or installation may cause fore or electric shock W Use the correctly rated breaker of fuse There is risk of fire or electric shock W Do not modify or extend the power cable There is risk of fire or electric shock W Do not install remove or reinstall the unit by yourself customer There is risk of fire electric shock explosion or injury W Be caution when unpacking and installing the product Sharp edges could cause injury be especially careful of the case edges and the fins on the condenser and evaporator W For installation always contact the dealer or an Authorized service center There is risk of fire electric shock explosion or injury W Do not install the product on a defective installation stand It may cause injury accident or damage to the product B Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury W Do notlet the air conditioner run for a long time when the humidity is very high and a door or a window is left open Moisture may condense and wet or damage furniture Take care to ensure that power cable could not be pulled out or damaged during operation There is risk of fire or electric shock W Do not
12. place anything on the power cable There is risk of fire or electric shock W Do not plug or unplug the power supply plug during operation There is risk of fire or electric shock W Do touch operation the product with wet hands There is risk of fire or electric shock W Do not place a heater or other appliance near the power cable There is risk of fire and electric shock Do not allow water to run into electric parts It may cause fire failure of the product or electric shock W Do not store or use flammable gas or combustible near the product There is risk of fire or failure of product Do not use the product in a tightly closed space for a long time Oxygen deficiency could occur When flammable gas leaks turn off the gas and open a window for ventilation before turn the product on Do not use the telephone or turn switches on or off There is risk of explosion or fire E If strange sounds or small or smoke comes from product Turn the breaker off or disconnect the power supply cable There is risk of electric shock or fire W Stop operation and close the window in storm or hurricane If possible remove the product from the window before the hurricane arrives There is risk of property damage failure of product or electric shock W Do not open the inlet grill of the product during operation Do not touch the electrostatic filter if the unit is so equipped There is risk of phys
13. than 3 minutes b The units runs with T3 lt 3 C for 80 minutes and keeps lower than 4 C for more than 3 minutes Condition 2 If T4 lt 0 C The program judges according to the condition 1 if the two items are satisfied then judges if T2 has descended for more than 5 if it has the machine starts defrosting or continues to judge T2 and will not defrost until T2 drops more than 5 C Condition 3 matter what value T4 is if the machine runs with T3 lt 3 C for more than 120 minutes and keeps lower than 2 C for more than 3 minutes the machine will defrost no matter if T2 drops for more than 5 C or not 2 Condition of ending defrosting If any one of following items is satisfied defrosting will finish and the machine will turn to normal heating mode rises to be higher than 12 C b to be higher than 8 C and remains for 80 seconds c The machine has run for 10 minutes in defrosting 8 7 7 X Defrosting action 23 compressor 4 way valve outdoor fan indoor fan indoor fan breeze 10s gt 4 2222 905 1005 i no longer than 10 minutes 22 30s 8 7 8 Rating capacity test function 1 Setthe indoor unit with remote controller as high fan 30 C in heating mode then press TURBO button on controller 6 times or more within 10 seconds make sure indoor unit receives these signals the machine will turn into rating capacity test mode the buzzer will make a di sound for 2
14. chine will turn back to previous setting mode 8 5 6 Indoor fan operation rule 1 cooling mode indoor fan runs all the time and the speed can be selected as high 20 medium low and auto 2 Auto fan in cooling mode acts as follow 40 4 3 0 medium 1 5 1 0 oom temp setting Temp AT 8 5 7 Condenser high temperature protection function in cooling and drying mode If T3 gt 60 C for 5 seconds compressor will stop immediately and the machine will not resume until 3 lt 52 8 6 Drying mode 8 6 1 Indoor fan speed is fixed at breeze grade and can t be changed The horizontal angle is the same as in cooling mode 8 6 20 Room overlow temperature protection In drying mode if room temperature is lower than 10 C compressor will stop and not resume until room temperature climbs up to 12 C 8 6 3 Evaporator anti freezing protection condenser high temperature protection and outdoor unit frequency limit are valid and they are the same as that in cooling mode 8 6 4 Horizontal louver action is the same as that in cooling mode 21 8 7 Heating mode 8 7 1 Indoor fan action 1 Anti cold wind function 44 38 37 setting fan speed 34 33 Evaporator temp 17 fan stop 2 If compressor stops caused by room temperature rising indoor fan will be forced to run 127 seconds with breeze During this period anti cold wind is disabled After this anti cold
15. cification MSR1 24HRDN1 QC2W Power supply MOF 24HDN1 QC2W 1 220 240V 50Hz Max input consumption 2950 Max current 13 5 Compressor Model DA150S1C 20FZ Type Twin rotary DC inverter Brand Toshiba Capacity 15286 Input 1150 Rated current RLA 9 7 Refrigerant oil 500 Indoor fan motor Model Brand YDK36 4C A Welling Input 72 70 54 Capacitor 3 Speed hi mi lo 1210 1020 950 Indoor air flow Hi Mi Lo 1120 950 880 Indoor noise level Hi Mi Lo 48 45 41 Indoor unit Dimension W H D 1030 x 313 x 221 Packing W H D 1135 x 435 x 315 Net Gross weight 14 19 Outdoor fan motor Outdoor air flow Model YDK55 6G Brand Welling Input Capacitor 103 76 840 630 Outdoor noise level 58 Outdoor unit Dimension W H D 845 695 335 Packing W H D 965 755 395 Net Gross weight 49 5 52 5 Refrigerant type R410A 1950 Design pressure 4 2 Refrigerant piping Liquid side Gas side 9 53 16 0 Max refrigerant pipe length 25 Max difference in level 10 Operation temp Ambient temp Application area The above design and specifications are subject to change without prior notice for product improvement 5 Refrigerant cycle diagram ONILV3H SNIIOOO
16. e with the push pin to the gas service port Air purging of the charge hose Open the low pressure valve on the charge set slightly to purge air from the charge hose 6 Set the 2 way valve to the close position 7 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 8 Immediately set the 3 way valve to the closed position Do this quickly so that the gauge ends up indicating 0 3 to 0 5Mpa Disconnect the charge set and amount the 2 way and 3 way valve s stem nuts and service port caps Use a torque wrench to tighten the service port cap to a torque of 1 8 kgf m Be sure to check for gas leakage 13 7 6 purging Re installation Pm 2 Outdoor unit T 2 Way L s Close Charging cylinder Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve Leave the valve on the charging cylinder closed 3 Air purging Open the valves on the charging cylinder and the charge set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut to on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the
17. eO 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 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the refrigerant to be discharged If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose Mounted the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 17 8 Electronic function 8 1 Abbreviation T1 Indoor ambient temperature T2 Pipe temperature of indoor heat exchanger T3 Pipe temperature of outdoor heat exchanger T4 Outdoor ambient temperature 8 2 Display function 8 2 1 Icon explanation on indoor display board Git Auto indicator This indicator illuminates when the air conditioner is in AUTO operation Timer indicator This indicator illuminates when TIMER is set ON OFF PRE DEF Indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode OPERATION indicator This indicator illuminates when the air conditioner is running 8 2 2 LED display control function Pressing LED display button on remote controller will tu
18. er cord of connect should be selected according to the following specifications sheet Grade 7 3 Pipe length and the elevation 3 Standard Max Additional Capacity Btu h Liquid B m g m s Elevation refrigerant Indoor unit Indoor unit Outdoor unit Caution Capacity is based on standard length and maximum allowance length is base of reliability Oil trap should be installed per 5 7 meters 7 4 Air purging of the piping and indoor unit Required tools Hexagonal wrench adjustable wrench torque 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 11 leakage from the refrigeration cycle Indoor unit Liquid side Vue N 2 way C valve Procedure Caution 1 Recheck the piping connections If gas leakage is discovered in step 3 above take the 2 Open the valve stem of the 2 way valve following measures counterclockwise approximately 90 wait 10 If the leaks stop when the piping connections are seconds and then set it to closed position tightened further continue working from step 4 Be sure to use a
19. ical injury electric shock or product failure W When the product is soaked flooded or submerged contact an Authorized service center There is risk of fire or electric shock W Be caution that water could not enter the product There is risk of fire electric shock or product damage W Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock W Turn the main power off when cleaning or maintaining the product There is risk of electric shock W When the product is not be used for a long time disconnect the power supply plug or turn off the breaker There is risk of product damage or failure or unintended operation W Take care to ensure that nobody could step on or fall onto the outdoor unit This could result in personal injury and product damage gt CAUTION W Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product W install the drain hose to ensure that water is drained away properly A bad connection may cause water leakage W Keep level even when installing the product To avoid vibration of water leakage W Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem for your neighbors W Use two or more people to lift and transport the product Avoid personal injury W Do not insta
20. ll the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the product Corrosion particularly on the condenser and evaporator fins could cause product malfunction or inefficient operation Operational W Do notexpose the skin directly to cool air for long periods of time Do not sit in the draft This could harm to your health Do not use the product for special purposes such as preserving foods works of art etc It is a consumer air conditioner not a precision refrigerant system There is risk of damage or loss of property W Do not block the inlet or outlet of air flow It may cause product failure W Use a soft cloth to clean Do not use harsh detergents solvents etc There is risk of fire electric shock or damage to the plastic parts of the product Do not touch the metal parts of the product when removing the air filter They are very sharp There is risk of personal injury W Do not step on pr put anything on the product outdoor units There is risk of personal injury and failure of product W 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 W 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
21. newly or if T4 lt 3 C and compressor has stopped for over 3 hours the compressor heating cable will work 2 Preheating mode A weak current flows through the coil of compressor from the wiring terminal of compressor then the compressor is heated without operation 3 Preheating release condition If T4 gt 5 C or user turns on the machine and compressor runs preheating function will stop 8 3 8 Compressor heating cable If outdoor temperature is lower than 5 C the compressor heating cable begins to work If outdoor temperature is higher than 15 C the compressor heating cable stops working 8 4 Fan Only Mode 8 4 1 Temperature setting function is disabled and no setting temperature display 8 4 2 In this mode the action of louver is the same as in cooling mode 8 4 3 The action of auto fan in fan only mode is the same as auto fan in cooling mode with 24 C setting temperature 3 5 4 3 0 medium 1 5 1 24 1 0 8 5 Cooling Mode 8 5 1 After starting the operation frequency of compressor submits to following rule 19 room temp setting Temp AT When the machine is running and AT room temp setting temp changes the frequency of compressor will rise or descend a grade 7 minutes after starting After starting if AT 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 f
22. ng heating The unit will be turn off at the seventh hour Anti cold function Independent dehumidification Brevantthecoldwind atthe beginning of unit start The function is usually used in rainy days in springtime or damp areas Auto defrost Air flow Direction control The louver can be set at the desired position or swing and down automatically Auto restart function When the power supply is interrupted and then restore the air conditioners automatically restore The mode can be change by the room temperature the previous function setting Temp Compensation Flexible wiring connection Outdoor unit Power relay control The unit has 3 mins delay between continuously ON OFF operations Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode 4 way valve control It is only operated in the heating operation mode except defrosting operation Anti rust cabinet Made from electrolytic zinc steel sheet and anti rust coated components Valve protection cover It protects the valves and prevents water from dripping Discharge pipe temperature protect Driving heating at 15 3 Dimension 3 1 Indoor Unit imension H D Model 24k 1030 313 221 3 2 Outdoor Unit MOF 24HDN1 QC2W 4 Spe
23. ood Replace the Sensor and Replace outdoor e box check if E5 display again 9 24 E6 open or short circuit of indoor temperature sensor diagnosis and solution Repair the connector and reconnect 29 Is the indoor temperature and evaporator sensor connector and connection good Replace the Sensor and Replace the indoor PCB check if E6 display again 9 2 5 PO Inverter module over strong current protection diagnosis and solution Repair the connector and reconnect 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 Check the compressor the failure cleared 9 2 6 1 voltage or too low voltage protection diagnosis and solution Is the power supply good Be sure the power supply is normal when using the units Replace the outdoor e box 9 2 7 P2 temperature protection of compressor top diagnosis and solution 30 Is the connection good Reconnect and retest Does compressor operate Is refrigerant circulation volume normal Is protector normal Replace the protector Check the outdoor main PCB Is there some problem Charge refrigerant Replace the outdoor PCB Is abnormality the same after gas charging Check refrigerant system such as
24. or units communication protection E5 Open or short circuit of outdoor temperature sensor E6 Open or short circuit of indoor temperature sensor PO Inverter module over strong current protection P1 Over voltage or too low voltage protection P2 Temperature protection of compressor top P4 Inverter compressor drive error 28 9 2 Diagnosis and Solution 9 2 1 EO EEPROM parameter error error diagnosis and solution Circuit or software error on indoor PCB Replace indoor PCB 9 2 2 1 outdoor units communication protection error diagnosis and solution Disconnect the power supply after 1 minute connect the power supply turn on the unit with remote controller Does the unit work normally NO Check the wiring between indoor and outdoor unit Is the connection of L N S and GND good Is the GND connection on outdoor PCB good NO Reconnect and retest again Yes Is the LED4 red on outdoor PCB bright and LED1 yellow blinking Replace indoor PCB and repower on Is the failure cleared Yes No The power supply for outdoor PCB is fail Check the wiring on outdoor PCB comparing with wiring plate Is the connection good No Replace outdoor e box Correct the connection 9 2 3 5 or short circuit of outdoor temperature sensor diagnosis and solution Is the outdoor temperature sensor connector and connection g
25. r 2 valve p MeN Gas side XZ Ba Open p e Cir GZ TI y etat 2222 222 cipem Wr 4 me ennt Ll Procedure 1 Connect the vacuum pump to the charge set s centre hose 2 Evacuation for approximately one hour Confirm that the gauge needle has moved toward 0 1 Mpa 76 cmHg vacuum of 4 mmHg or less 3 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge 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 16 7 9 Gas charging Indoor unit NN Liquid side E N vi Outdoor unit val Charging cylinder Procedure 1 Connect the charge hose to the charging cylinder Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant if can be charged with a little at a time approximately 150g each tim
26. requency 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 AT is less than 2 C 8 5 2 Indoor heat exchanger anti freezing function If T2 is lower than 0 C the compressor stops and resumes when 2 gt 5 8 5 3 Outdoor unit current control in cooling mode refer to the parameter table comp pause I3COOL freq descends if curr rises I2COOL freq remains if curr descends outdoor unit current COOL running normally 8 5 4 Rating capacity test function 1 Setthe indoor unit with remote controller as high fan 17 C in cooling mode then press TURBO button on controller 6 times or more within 10 seconds make sure indoor unit receives these signals the machine will turn into rating capacity test mode the buzzer will make a di sound for 2 seconds continuously Also indoor fan will change to rating speed the frequency of compressor will be fixed as rating value Any condition of above is not satisfied the machine can not be turned into rating capacity test mode 2 The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature 8 5 5 Turbo function press the TURBO button on remote controller 1 Elevate current frequency to a higher grade 2 Indoor fan turns to turbo speed 3 After running for 30 minutes the ma
27. rn off all displays on indoor unit while pressing once again all displays will resume 8 3 Protection 8 3 1 Protection of compressor top temperature When the Over load Protector is cut due to too high temperature of compressor top the unit will stop When the Over load Protector is closed again due to decreasing of compressor top temperature the unit will restart in this case the compressor is restricted by Three Minutes Delay protection 8 3 2 Protection of discharge temperature Td 1 Compressor will stop immediately if Td gt 115 for 5s 2 If 90 STdS115 compressor will run with restricted frequency 3 If Td lt 90 C compressor will restart or run without restricted frequency 8 3 8 Three Minutes Delay at restart for compressor It will take 3 minutes every time when compressor starts 18 It will take only 1 minute when the unit is powered on at first time 8 3 4 Temperature sensor protection at open circuit or short circuit 8 3 5 Inverter module Protection Inverter module has a protection function against current voltage and temperature If these protections happened the unit will stop and LED display error code 8 3 6 Indoor fan delayed open function When the unit is turned on at all modes the indoor fan will operate 10 seconds later than the action of louver 8 3 7 Compressor preheating function 1 Preheating permitting condition If T4 outdoor ambient temperature lt 3 C and the machine connects to power supply
28. seconds continuously Also indoor fan will change to rating speed the frequency of compressor will be fixed as rating value Any condition of above is not satisfied the machine can not be turned into rating capacity test mode 2 The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature 8 7 9 Turbo function in heating mode Elevate current frequency excluding F8 to a higher grade If indoor fan is in low speed or pause caused by defrosting or anti cold wind function frequency of compressor will not be elevated one grade until these limit has been released 1 Indoor fan changes to turbo speed and anti cold wind function is valid 2 After running for 30 minutes the machine will turn back to previous setting mode 24 8 8 Auto mode function 8 8 1 This mode be chosen with remote controller and the setting temperature can be changed between 17 30 C In auto mode the machine will choose cooling heating or fan only mode according to AT AT 7T 1 Ts 8 8 2 Indoor fan will choose auto speed of relevant mode 8 8 3 If the machine switches mode between heating and cooling compressor will keep stopping for 15 minutes and then rechoose mode according to AT 8 8 4 If the setting temperature is modified the machine will rechoose running function 8 9 Forced operation function 8 9 1 Forced cooling and auto function can carry out with a touch button In these two
29. teet dee vides 11 7 4 Air purging of the piping and indoor 11 7 5 Pumping down 13 7 6 purging Re installation 14 7 7 Balance refrigerant of the 2 way 3 way valves 15 7 8 EVACUATION ii uan RE 16 7 9 charging ed ie pud tae alte tede petite etel eee 17 8 Electronic function ioi oer S NEE 18 NE drum 18 8 2 Display f nction 7 eda eee ea ede aee eb eden dre 18 9 3 18 8 4 Fan Only MOd R A 19 8 5 Cooling Mode rt Ce HERE D e Lb e 19 8 65 Dryingimiode iue tette utile tet eim eei 21 8 77 Heating ModS rto epi oH 22 88 Auto mode oo pte de beet ado tee d erniet tene 25 8 9 Forced operation function ee tete dede aed dde date inde Exe inden 25 8 10 Action of 4 way ValV6 ere CU PREDA ERR ANH ERR ER E 25 8 11 Two speeds outdoor fan
30. valve on the charging cylinder and discharge the refrigerant until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems 7 Mount the valve stems nuts and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 14 7 7 Balance refrigerant of the 2 way 3 way valves Indoor unit ZZ Liquid side Outdoor unit T ZA 2 way valve I Ic Gas side Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position 2 Connect the charge set to the 3 way valve s service port Leave the valve on the charge set closed Connect the charge hose with the push pin to the service port 3 Open the valves Low side on the charge set and discharge the refrigerant until the gauge indicates 0 05 to 0 1Mpa If there is no air in the refrigeration cycle the pressure when the air conditioner is not running is higher than 0 1Mpa discharge the refrigerant until the gauge indicates 0 05 to 0 1 Mpa If this is the case it will not be necessary to apply a evacuation Discharge the refrigeration gradually if it is discharged too suddenly the refrigeration oil sill be discharged 15 7 8 Evacuation Indoor unit Liquid side Outdoor unit o S
31. xed as low speed 3 When heating the setting temperature descends 1 C be lower than 30 C every one hour 2 hour later the descending stops and indoor fan is fixed as low speed and anti cold wind is available 8 13 4 If user uses timer on function in sleep mode sleep function will pause and not resume until reaches the setting on time 8 13 5 When user uses timer off function in sleep mode or sleep function in timer off mode if the timing time is less than 7 hours sleep function will be cancelled when reaching the setting time If the timing time is more than 7 hours the machine will not stop until reaches the setting off time in sleep mode 8 14 Auto Restart function The indoor unit is equipped with auto restart function In case of a sudden power failure the setting conditions before the power failure will be restored The unit will resume the previous operation setting automatically after 3 minutes when power returns 26 9 Troubleshooting Safety Because of there are capacitors in PCB and relative circuit in outdoor unit even shut down the power supply electricity power still are kept in capacitors do not forget to discharge the electricity power in capacitor 51 N M P Electrolytic Capacitors HIGH VOLTAGE CAUTION J Bulb 25 40W 27 9 1 Indoor Unit Error Display Display LED STATUS EO EEPROM parameter error E1 Indoor outdo
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