OASIS 3D INVERTER SERIES
Contents
1. MS11MU 09HRFN1 QRDOW MS11M O9HRFN1 QRD1W A MS11MU 12HRFN1 QRDOW MS11MU 12HRFN1 QRDOW B MS11M 12HRFN1 QRD1W A MS11MU 18HRFN1 QRC8GW MS11M1 24HRDN1 QRC8W MS11MU O9HRFN1 QRDOW MS11M O9HRFN1 QRD1W A ae MS11MU 1 2HRFN1 QRDOW 8 mm Dimension of installation hole 135 mm H mm R 260 mm 275 L MS11M 12HRFN1 QRD1W A MS11MU 18HRFN1 QRC8GW 2 je t 2 5 7 2 D C fod 2 I am mal MS11M1 24HRDN1 QRC8W 3 2 Outdoor Unit More than 30cm VIII Y PO Airiniet More than 60cm Service space eh amp al RR Model Wi MOC 09HFN1 QRDOW MOC 09HFN1 QRD1W MOC 12HFN1 QRDOW MOC 12HFN1 QRD1W 760 MOC1 12HFN1 QRDOW MOC 18HFN1 QRC8W 285 590 823 530 290 MOF 24HFN1 QRC8W 845 320 700 908 560 335 4 Refrigerant Cycle Diagram For 9k 12k 18k models INDOOR OUTDOOR LIQUID SIDE Electronic Expansion Valve 4 gt XK DE LUN WD ___2 WAY VALVE CAPILIARY TUBE v _ HEAT HEAT EXCHANGE EXCHANGE EVAPORATOR CONDENSER T il gt eed GAS SIDE amp v 2 v K x 3 WAY VALVE REVERSING VALVE ACCUMULATOR D ih LF2. Consult with technical engineer to get definite value Then start up the unit measure the voltage between P and N Is it in 220V 400V Yes Y Replace outdoor main PCB A Replace the IPM board if it is separate with main PCB 55 9 2 9 Inverter compressor drive error diagnosis and solution P4 Check if the wiring between main PCB and compressor connected by Roreck the ponnecien Yes gt replace the wires and error and if the wires and connectors connectors are broken No y Correct the installation Check if the IPM installed correctly No gt tighten the screws and apply silicon grease Yes y IPM continuity check Check if the Replace the IPM board or replace IPM terminal resistance values are No gt the main PCB if the IPM board and uniform main PCB are integrated together Yes Refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved Check if the outdoor fan runs properly or the outdoor unit No gt ventilation is good Yes Check if the compressor resistance No gt Replace the compressor values are uniform Yes t Replace the outdoor main PCB if the main PCB and IPM are separate 56 Safety Electricity power is still kept in capacitors even the power supply is shut off Do not
3. Find out the cause and have it solved For example check rotate the fan by hand No Does it rotate properly Yes x Check the wires of fan No whether the fan is blocked or the bearing is broken Correct the connections motor Are all the connections good y Yes If the Check whether the fan Resten malfunction is motor is normal through No P m still existing motor index 1 replace the A main PCB No Yes Replace the Check whether the main PCB is main PCB No gt The normal through index 2 0 malfunction is solved Yes 49 Index 1 1 Indoor or Outdoor DC Fan Motor control chip is in fan motor Measure the resistance value of each winding by using the tester If any resistance value is zero the fan motor must has problems and need to be replaced 2 Indoor AC Fan Motor Measure the resistance value of each winding by using the tester Input Terminal fo ad Red 1 Black 2 White White 3 Black 3 Outdoor DC Fan Motor control chip is in outdoor PCB UVW Feedback 1 5 Ein port z N A 5 1 5 1 NO 1 2 3 4 5 Color Orange Grey White Pink Black Signal Hu Hv Hw Vec GND Color Red Blue Yellow Signal W V U 1 Release the UVW connector Measure the resistance of U V U W V W If
4. COOLING COMPRESSOR 4 HEATING 11 For 24k model INDOOR HEAT EXCHANGE EVAPORATOR OUTDOOR qe CHECK VALVE LIQUID SIDE Heating Model only EE TOTO 2 WAY VALVE 0 00000 CAPILIARY TUBE HEAT EXCHANGE CONDENSER en GAS SIDE s i i pee K K Co 5 3 WAY VALVE REVERSING VALVE Heating Model onl ACCUMULATOR D zei Heating Model only LJ 4 COOLING COMPRESSOR 4 HEATING 12 5 Wiring Diagram 5 1 Indoor Unit MS11MU 09HRFN1 QRDOW MS11M 09HRFN1 QRD1W A MS11MU 12HRFN1 QRDOW MS11M 12HRFN1 QRD1W A MS11MU 12HRFN1 QRDOW B MS11MU 18HRFN1 QRC8GW 202032891104 NOTE If used as MONO unit for the standby control needs the cross section area of cable connected to L 1 1 2 N must be sufficient for the maximum system current The maximum system current is equal to the sum of indoor unit and outdoor unit rated current If used as MULTI unit L 1 on the terminal block does not need to be connected SWIMG MOTORI SWIMG MOTOR2 OPTIONAL O Q CN12 1 Ch12 2 O CN6 1 INDOOR WIRING DIAGRAM MS11M1 24HRDN1 QRC8W NOTE If used as MONO unit for the standby control needs the cross section area of cable connected to L 1 1 2 N must be sufficient for the maximum system current The maximum system current is equal to the sum of indoor unit and
5. 3 Put the charging cylinder onto the electronic scale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the proper weight disconnect the charge hose from the 3 way valve s service port immediately If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 6 Mounted the valve stem caps and the service port 24 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 25 Outdoor temperature For the models with low temperature cooling system Operation Characteristics Temperature f Cooling operation Heating operation Drying operation Mode Room temperature 217 C lt 30 C gt 10 C O C 50 C 15 C 50 C 15 C 30 C 0 C 50 C CAUTION 1 If the air conditioner is used beyond the above conditions certain safety protection features may come into operation and cause the unit to operate abnormally 2 The room relative humidity should be
6. B 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 EB Always ground the product There is risk of fire or electric shock EB Install the panel and the cover of control box securely There is risk of fire of electric shock EB Always install a dedicated circuit and breaker Improper wiring or installation may cause fore or electric shock m Use the correctly rated breaker of fuse There is risk of fire or electric shock B Do not modify or extend the power cable There is risk of fire or electric shock B Do not install remove or reinstall the unit by yourself customer There is risk of fire electric shock explosion or injury 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 B For installation always contact the dealer or an authorized service center B Do not install the product on a defective installation stand 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 B Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open EB Take care to ensure that power ca
7. Evacuation for the whole system Outdoor unit Indoor unit yn AN Liquid side C F 2 way vive N Vacuum pump Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indicates 0 1 Mpa 4 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 5 Disconnect the charge hose from the vacuum pump 23 2 Refrigerant charging Indoor unit YTZ Liquid side en oe Outdoor unit Sao J A C NL mi AM g gt 3 vave N el 8 gt a s Lamy omen N he N KAA ye Ees valve 7 Check valve Charging cylinder Electronic scale Procedure 1 Connect the charge hose to the charging cylinder open the 2 way valve and the 3 way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant
8. Midea OASIS 3D INVERTER SERIES Service Manual 2013 11MSFI A2 1301 r re Aoi suse at e UT Eed dede oa m t CONTENTS Te Procal ON aiie A E EN E T ens uber cu uu cnuctsuautesdeacuctesseubecdsuceuecsuntuasessanpesessoustes 3 ESTEA A Ee OINO A etten tented EA EE tee ede 3 1 2 WalninQ nsdasaiaedadaiadadad adwdadadwadaiad ad aladaiadadadavadaladaiadaue 3 2 FUNCOM shade casas Fone a ac ceca ets sak ta kene men ca ark ceded teak A E thadvceutucudes ncdaerstncaeges tatwacusaeden wean 7 Ss DIMONSION ioa Aa E E AEEA EEEE EEE EA 8 get Indoor Ultental NS 8 3 2 Outdoor Unit aici EE nn he een nhn ene ene eene 10 4 Refrigerant Cycle Diagram naan anneer enne enenneennnenennnenensenennansnanenennnneensennnnanenanenennnnennsnenannnenannnennnnennn 11 SOE AT DU aA Vn 13 Sal Indoor Unit ber ih oee i evn de ao a va elen be vale 13 52 Outdoor UMN seriuse trenei ri EKEK EEEE re a re ee 14 6 Installation DetallS 5 25 sei see oe ches toetsen cece ek se eet cs ed soak ceed eect ate scat aca cence ede deelne 15 6 1 Wrench torque sheet for installation nnn ennnenennennennenennnerenneerenerennnerenneerenverenenenenen 15 6 2 Connecting ne CABIES sea sO re oes 15 6 3 Pipe length and the elevation nne enneenennenennereenneenennenenneneenneenenenennereenneenensenenneneensenn 16 6 4 Installation f r the first IMG s sisien nanpa paesasvegpesceeanspepdscrepasdeneeacetesctenndacedaaoepevesay 17 6 5 Adding the refrigerant after runnin
9. a liquid neutral detergent on the indoor unit connections or outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping If bubbles come out the pipes have leakage 1 Air purging with vacuum pump Indoor unit ies Liquid side 2 Outdoor unit C N 1 Vn way O FN Close 2 NE i aw vag x if ae C J Gas side EE Ke J way valve Manifold valve Eos Compound meter 27 x T ZS La A a Y je J amp g Pressure A B gauge x 0 1MPa 12 AL e Handle Lo Handle Hi Charge hose Vacuum pump a X Cees a ty Vacuum pump C Charge hose 3 way valves are set to the closed position Completely tighten the flare nuts of the indoor and outdoor units confirm that both the 2 way and 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Connect the charge hose of handle hi connection to the vacuum pump 4 Fully open the handle Lo of the manifold valve 5 Operate the vacuum pump to evacuate 6 Make evacuation for 30 minutes and check whether the compound meter indicates 0 1Mpa If 17 the meter does not indicate 0 1Mpa after pumping 30 minutes it should be pumped 20 minutes more If the pressure can t achieve 0 1Mpa after pumping 50 minutes please
10. active and the same as that in cooling mode 8 4 5 5 The outdoor fan operates the same as in cooling mode 8 4 6 Forced operation function 8 4 6 1 Enter forced operation function When the machine is off pressing the touch button will carry the machine to forced auto mode If pressing the button once again within 5 seconds the machine will turn into forced cooling mode In forced auto forced cooling or any other operation mode pressing touch button will turn off the machine 8 4 6 2 In forced operation mode all general protections and remote control are available 8 4 6 3 Operation rules Forced cooling mode The compressor runs at F2 frequency and indoor fan runs as breeze After running for 30 minutes the machine will turn to auto mode as 24 C setting temperature Forced auto mode The action of forced auto mode is the same as normal auto mode with 24 C setting temperature 8 4 7 Timer function 8 4 7 1 Timing range is 24 hours 8 4 7 2 Timer on The machine will turn on automatically when reaching the setting time 8 4 7 3 Timer off The machine will turn off automatically when reaching the setting time 42 8 4 7 4 Timer on 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 4 7 5 Timer off on The machine will turn off automatically when reaching the setting off time and then turn on automatically when reach
11. check if there are some leakage points Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump Confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 7 Turn the flare nut of the 3 way valves about 45 counterclockwise for 6 or 7seconds after the gas coming out then tighten the flare nut again Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve 2 Air purging by refrigerant Indoor unit Y r Liquid side PI Uzi Close ol EN id NE T 171 Jen ie valve eN Charging cylinder Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve 3 Air purging Open the valves on the charging cylinder and the charge set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and
12. discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems 7 Mount the valve stems nuts and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 3 Adding the refrigerant if the pipe length gt 5m Indoor unit YTAN Liquid side j el z J N Ge valve Y ek a oe Outdoor unit gt nn mE gt C aie TZ Gas side en k NZ Check valve Charging cylinder Electronic scale Procedure 1 Connect the charge hose to the charging cylinder open the 2 way valve and the 3 way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure the liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the va
13. forget to discharge the electricity power in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION Connect discharge resistance approx 100Q 40W or soldering iron plug between terminals of the electrolytic capacitor on the contrary side of the outdoor PCB Discharging position Discharging period 10 seconds or more Plug of 1 soldering iron m j Note The picture above is only for reference The plug of your side may be different Main parts check 1 Temperature sensor checking Disconnect the temperature sensor from PCB measure the resistance value with a tester mAn Ni Q Tester 57 Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp T5 sensor Measure the resistance value of each winding by using the multi meter Table 1 Some frequently used R T data for T1 T2 T3 and T4 sensor Tenpeawe Js o e los Jo Jo eo Ressance vaue Kay 289 207 rea 120 ro e 52 as 2a Table 2 Some frequently used R T data for T5 sensor Tenpeawe s els slo 7 jee je Rossano vaea vers oe 61 ae vooor eo s o7 Resistance value KQ A CEDA EE EL rt pt T2 T3 T4 Temperature C 58 Spec Code 27003230081
14. protection of compressor top The unit will stop working when the compressor top temp protector cut off and will restart after the compressor top temp protector restart 8 3 3 Temperature protection of compressor discharge When the compressor discharge temp is getting higher the running frequency will be limited as below rules Compressor discharge temp T5 gt 115 C for 5s compressor stops and restarts up till T5 lt 90 C 110 lt T5 lt 115 C decrease the frequency to the lower level every 2 minutes 105 lt T5 lt 110 C keep running at the current frequency T5 lt 105 C no limit for frequency 8 3 4 Fan Speed is out of control When Indoor Fan Speed keeps too low 300RPM for certain time the unit will stop and the LED will display the failure 8 3 5 Inverter module protection The Inverter module has a protection function about current voltage and temperature If these protections happen the corresponding code will display on indoor unit and the unit will stop working 8 3 6 Indoor fan delayed open function When the unit starts up the louver will be active immediately and the indoor fan will open 10s later If the unit runs in heating mode the indoor fan will be also controlled by anti cold wind function 8 3 7 Compressor preheating functions Preheating permitting condition If T4 outdoor ambient temperature lt 3 C and the machine connects to power supply newly or if T4 lt 3 C and compressor has stopped for ov
15. setting conditions before the power failure The unit will resume the previous operation setting not including swing function automatically after 3 minutes when power returns If the memorization condition is forced cooling mode the unit will run in cooling mode for 30 minutes and turn to auto mode as 24 C setting temp If AC is off before power off and AC is required to start up now the compressor will have 1 minute delay when power on Other conditions the compressor will have 3 minutes delay when restarts 43 8 4 10 8C Heating optional In heating operation the preset temperature of the air conditioner can be as lower as 8 C which keeps the room temperature steady at 8 C and prevents household things freezing when the house is unoccupied for a long time in severe cold weather 8 4 11 Follow me optional 1 If the indoor PCB receives the signal which results from pressing the FOLLOW ME button on remote controller the buzzer will emit a sound and this indicates the follow me function is initiated But when the indoor PCB receives signal which sent from remote controller every 3 minutes the buzzer will not respond When the unit is running with follow me function the PCB will control the unit according to the temperature from follow me signal and the temperature collection function of room temperature sensor will be shielded but the error detective function of room temperature sensor will be still valid 2 When the follow me
16. to measure the resistance between P and UVWN UVW and N Normal resistance value Digital tester Red Black N oo Several MO U V W Digital tester Normal resistance value Red Black U 00 V N W Several MQ 60
17. to tighten the 3 way valves service port cap to a torque of 18N m Be sure to check for gas leakage 2 Air purging by the refrigerant 2 Outdoor unit y valve Charging cylinder Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve Leave the valve on the charging cylinder closed 3 Air purging Open the valves on the charging cylinder and the charge set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant 22 Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems 7 Mount the valve stems nuts and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 6 7 Re installation while the outdoor unit need to be repaired 1
18. 5 270032500630 270032800605 Model MS11MU 09HRFN1 QRDOW EMS11MU 12HRFN1 QRDOW MS11MU 18HRFN1 QRC8W Compressor DA108X1C 20FZ3 DA130M1C 31FZ DA150S1C 20FZ WZDK20 38G WZDK20 38G WZDK58 38G Indoor fan motor x sx sx Outdoor fan WZDK35 38G H WZDK35 38G H WZDK35 38G H motor Code 270032300814 270032500629 270032500647 Model MS11M O9HRFN1 QRD1W A MS11M 12HRFN1 QRD1W A MS11MU 12HRFN1 QRDOW B Compressor DA108X1C 20FZ3 DA130M1C 31FZ DA108X1C 20FZ3 WZDK20 38G WZDK58 38G WZDK20 38G Indoor fan motor 2x x ox Outdoor fan WZDK35 38G H WZDK35 38G H WZDK35 38G H motor x Code 210033000477 Model MS11M1 24HRDN1 QRC8W Compressor DA250S2C 30MT Indoor fan RPG50C motor Outdoor fan WZDK50 38G motor xx Note The motor marked means DC fan motor with control chip in the PCB while the ones marked yx means DC fan motor with control chip in the fan motor 2 Compressor checking Measure the resistance value of each winding by using the tester Input Terminal Blue 4 Red 2 Black 3 Blue A a Black N Red Resistance Value DA108X1C 20FZ3 DA130M1C 31FZ DA150S1C 20FZ DA250S2C 30MT Blue Red 0 710 1 770 0 950 0 550 Blue Black Black 20 C 20 C 20 C 20 C 59 Red Blue 3 IPM continuity check Turn off the power let the large capacity electrolytic capacitors discharge completely and dismount the IPM Use a digital tester
19. B When the product is soaked contact an authorized service center There is risk of fire or electric shock B Be caution that water could not enter the product There is risk of fire electric shock or product damage B Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock B Turn the main power off when cleaning or maintaining the product There is risk of electric shock B When the product is not be used for a long time disconnect the power supply plug or turn off the breaker There is risk of product damage or failure or unintended operation B 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 B Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product B Install the drain hose to ensure that water is drained away properly Abad connection may cause water leakage B Keep level even when installing the product It can avoid vibration of water leakage B Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem for your neighbors B Use two or more people to lift and transport the product B Do not install the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the p
20. Evaporator coil temperature sensor T2 open circuit or yx 6 times X E5 short circuit Outdoor ambient temperature sensor T4 open circuit or yx 2 times short circuit Condenser coil temperature sensor T3 open circuit or yx 3 times short circuit Compressor discharge temperature sensor T5 open vx 4 times circuit or short circuit 45066 o Fa Outdoor unit EEPROM parameter error 63606 o F Outdoor fan speed has been out of control srttimes x Po IPM malfunction or IGBT over strong current protection ea Over voltage or over low voltage protection High temperature protection of compressor top diagnosis yx 3 times and solution Only for MS11MU 18HRFN1 QRC8W yw 5 times Inverter compressor drive error 46 9 2 Diagnosis and Solution 9 2 1 EEPROM parameter error diagnosis and solution E0 Shut off the power supply and turn it on 5 seconds later Is it still displaying the error code Yes y If the EEPROM chip is welded on main PCB replace the main PCB directly Otherwise check No gt Correct the connection whether the EEPROM chip plugged in main PCB well Yes t Replace the indoor main PCB EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage 47 9 2 2 Indoor unit and outdoor unit communication protection error diagnosis and solution E1 Power off then turn on the unit 5 seconds la
21. FREHEATMAX1 27 25 Fmax T4FREHEATMAX2 24 a Fmax T4FREHEATMAX3 IE Fmax T4FREHEATMAX4 i Fmax T4F REHEATMAX5 hj Fmax T4FREHEATMAX6 1 Fmax T4FREHEATMAX7 Fmax T4FREHEATMAX8 1 Fmax T4FREHEATMAX9 0 Fmax F21 3 4 Fmax F22 7 8 Fmax F23 11 12 Fmax F24 V 15 16 Fmax F25 35 Meanwhile the maximum frequency is limited by the indoor fan speed Indoor fan speed Maximum frequency Silent mode High speed 8 degree heating turbo function No limit Medium speed FHeatMaxMidFan Low speed sleep mode FHeatMaxLowFan Fixed at F3 If users switch on AC by remote controller the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below T1 TS AT 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 While the zones of A B C are corresponding to different compressor running frequency AT 0 C as default Note When T1 Ts keeps in the same temp zone for 3 minutes the compressor will run as the below rules A Increase the frequency to 3 grade higher until to FREMAX B E Increase the frequency to 2 grade higher until to FREMAX F G Increase the frequency to 1 grade higher until to FREMAX H Keep the current frequency l Decrease the freque
22. ble could not be pulled out or damaged during operation There is risk of fire or electric shock B Do not place anything on the power cable There is risk of fire or electric shock B Do not plug or unplug the power supply plug during operation There is risk of fire or electric shock B Do not touch operation the product with wet hands B Do not place a heater or other appliance near the power cable There is risk of fire and electric shock B Donot allow water to run into electrical parts It may cause fire failure of the product or electric shock B Do not store or use flammable gas or combustible near the product There is risk of fire or failure of product B Do not use the product in a tightly closed space for a long time Oxygen deficiency could occur B When flammable gas leaks turn off the gas and open a window for ventilation before turn the product on B If strange sounds or smoke comes from product turn the breaker off or disconnect the power supply cable There is risk of electric shock or fire EB Stop operation and close the window in storm or hurricane If possible remove the product from the window before the hurricane arrives 4 There is risk of property damage failure of product or electric shock B Donot open the inlet grill of the product during operation Do not touch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failure
23. d turn off the air conditioner before disconnecting the hose 7 Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 6 6 Re installation while the indoor unit need to be repaired 1 Collecting the refrigerant into the outdoor unit 2 Groot am 5 REECE enke Outdoor unit J N i en wa N y valve i i 2 Gas ws _ y Y 5 N 3 mi Pr jin way valve he une M Close Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position Be sure to use a hexagonal wrench to operate the valve stems 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Air purging of the charge hose Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to the close position 21 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1 MPa 6 Set the 3 way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0 3 to 0 5Mpa Disconnect the charge set and tighten the 2 way and 3 way valve s stem nuts Use a torque wrench
24. e angle must be within the allowable range if it exceeds it will memorize the maximum angle of the louver During operation if the power fails or the end user shuts down the unit in the turbo mode the louver will restore to the default angle 8 4 15 INTELLIGENT EYE optional With the built in infrared sensor the indoor unit detects human movement The AC will turn off if you leave the room for 30 minutes and turn on automatically when you come back which helps saving more energy 8 4 16 Silence operation optional Press the silence button on remote controller to initiate SILENCE function When the Silence function is activated the compressor running frequency will keep lower than F2 and the indoor unit will bring faint breeze which will reduce the noise to the lowest level and create a quiet and comfortable room for you 8 4 17 Frequency limitation protection vl Normal VOLT _RST1_ADD VOLT LIM1_ ADD leien tis VOLT LIM FREQ1 ADD VOLT _LIM2 ADD VOLT LIM FREQ2 ADD The PCB will detect the voltage of power supply and adjust the compressor running frequency to protect the system In the first 10 seconds after power on this protection is inactive When this protection happens it will last 3 minutes and then the PCB will detect the power supply voltage again 45 9 Troubleshooting 9 1 Indoor Unit Error Display Indoor room temperature sensor T1 open circuit or short yx 5 times X E4 circuit
25. er 3 hours the compressor heating cable will work Preheating mode A weak current flow through the coil of compressor from the wiring terminal of the compressor then the compressor is heated without operation Preheating release condition 28 If T4 gt 5 C or the compressor starts running the preheating function will stop 8 3 8 Sensor protection at open circuit and breaking disconnection When there s one temperature sensor in malfunction the air conditioner will display error code and will not stop immediately to avoid the case that the air conditioner is in urgent need Fault temp Operation in cooling drying and Operation in heating mode sensor fan only mode T1 Run supposed T1 26 C high fan Run supposed T1 26 C high fan speed speed T2 Refer to table 1 Refer to table 2 T3 Run with compressor frequency 3 minutes defrosting every 40 not higher than F14 minutes when T4 lt 7 C 2 minutes defrosting every 90 minutes when T4277 T4 Run supposed T4 50 C Run supposed T4 15 C TP Run supposed T4 50 C Run supposed T4 15 C T1 l Til t 4 T lt 12 LN T 19 23 o lt F1 2 Indoor fan 1 minute 1 off 1 minute M ane then 800 minutes onts the setting fan speed minutes off table 1 table 2 8 4 10 Refrigerant leakage detection This function is only active in cooling mode It can better prevent the compressor being damaged by refrigerant leakage or compres
26. es In cooling mode indoor fan runs all the time and the speed can be selected as high medium low auto and silent When the compressor is running the indoor fan is controlled as below speed H H H G z H H MH M M Z M M MH M M Z 5 cra M M M L ar at pa 33 The auto fan acts as below rules T1 Ts 6 0 genteel ae a A H L 0 75 L f a 2 5 t ae f ke aa 1 0 eee 8 4 2 4 Condenser temperature protection 55 C lt T3 lt 60 C the compressor frequency will decrease to the lower level until to F1 and then runs at F1 lf T3 lt 54 C the compressor will keep running at the current frequency T3 lt 52 C the compressor will not limit the frequency and resume to the former frequency T3 gt 60 C for 5 seconds the compressor will stop until T3 lt 52 C 8 4 2 5 Evaporator temperature protection T2 lt 0 C the compressor will stop and restart when T2 gt 5 C 0 C T2 lt 4 C the compressor frequency will be limited and decreased to the lower level 4 CST2s7 C the compressor will keep the current frequency T2 gt 7 C the compressor frequency will not be limited 34 8 4 3 Heating Mode 8 4 3 1 Compressor running rules The maximum operation frequency of the compressor after starting submits to the following rule T4 34 A off 33 28 Fmax T4
27. function is available the PCB will control the unit according to the room temperature from the remote controller and the setting temperature 3 The PCB will take action to the mode change information from remote controller signal but it will not affected by the setting temperature 4 When the unit is running with follow me function if the PCB doesn t receive any signal from remote controller for 7 minutes or pressing FOLLOW ME button again the follow me function will be turned off automatically and the temperature collection function of room temperature sensor will be available the PCB will control the unit according to the room temperature detected from its own room temperature sensor and setting temperature 8 4 12 Self clean optional For heat pump models which are provided with this function after running in cooling or drying mode if the user press Self Clean button on remote controller firstly indoor unit runs in fan only mode for a while then low heat operation and finally runs in fan only again This function can keep the inside of indoor unit dry and prevent breeding of mold 8 4 13 Refrigerant Leakage Detection With this new technology the display area will show EC when the outdoor unit detects refrigerant 44 leakage 8 4 14 Louver Position Memory Function When starting the unit again after shutting down its louver will restore to the angle originally set by the user but the precondition is that th
28. g the system for many years nennen 20 6 6 Re installation while the indoor unit need to be repaired nnen nere nenneenennereneneneneen 21 6 7 Re installation while the outdoor unit need to be repaired nnee nenneeeenneneneneneneen 23 7 Operation CharacteriSs CS 22 zetoron ee eaa a aaaea Ea lead Shak e ap E beseendtenonkebedenantHranesvaus dend envevand dend dee 26 SrElectronie T neON zz erneer aeaa EnA EEAS ceedhcad saaSscceiaedauegccedscatecuesuadenatstaccecesuaeccasecedeenctuadccahcacs 27 B A AbbreviatlOn srt edere nie 27 8 2 Display TUNCHO H z c i verankert eenden rennen ehehe dee anamnese 27 8 3 Main ProtectlOn nnn ner wanen instante nea de suse sa sate a aa a eE e Aa A A A ATARE ARAR RA RAR ARE apai 28 8 4 Operation Modes and FUNGNOAS ttr tetten tetten td ttt tt a lt al ta Cl te tad 30 9 Troubleshooting zt cre occ Sic A sn ennennn sweet cane cena neden ce E EN 46 9 1 Indoor Wnit Error Display nva nee ine ain 46 92 Diagndsis and SOU Er 47 1 Precaution 1 1 Safety Precaution B To prevent injury to the user or other people and property damage the following instructions must be followed B Incorrect operation due to ignoring instruction will cause harm or damage B Before service the unit be sure to read this service manual at first 1 2 Warning gt Installation B Do not use a defective or underrated circuit breaker Use this appliance on a dedicated circuit There is risk of fire or electric shock
29. ing the setting on time 8 4 7 6 The timer function will not change the AC current operation mode Suppose AG is off now it will not start up firstly after setting the timer off function And when reaching the setting time the timer LED will be off and the AC running mode has not been changed 8 4 7 7 The setting time is relative time 8 4 8 Sleep function mode 8 4 8 1 Operation time in sleep mode is 7 hours After 7 hours the AC quits this mode and turns off 8 4 8 2 Operation process in sleep mode is as follow When cooling the setting temperature rises 1 C be lower than 30 C every one hour 2 hours later the setting temperature stops rising and indoor fan is fixed as low speed When heating the setting temperature decreases 1 C be higher than 17 C every one hour 2 hours later the setting temperature stops rising and indoor fan is fixed as low speed Anti cold wind function has the priority 8 4 8 3 Timer setting is available 8 4 8 4 When user uses timer off function in sleep mode or sleep function in timer off mode if the timing is less than 7 hours sleep function will be cancelled when reaching the setting time If the timing is more than 7 hours the machine will not stop until reaches the setting time in sleep mode 8 4 9 Auto Restart function The indoor unit is equipped with auto restart function which is carried out through an auto restart module In case of a sudden power failure the module memorizes the
30. less than 80 If the air conditioner operates beyond this figure the surface of the air conditioner may attract condensation Please set the vertical air flow louver to its maximum angle vertically to the floor and set HIGH fan mode 3 The optimum performance will be achieved during this operating temperature zone 26 8 Electronic function 8 1 Abbreviation 11 12 T3 T4 15 Indoor room temperature Coil temperature of evaporator Coil temperature of condenser Outdoor ambient temperature Compressor discharge temperature 8 2 Display function 8 2 1 Icon explanation on indoor display board Signal receiver ION indication lamp optional function This lamp illuminates when Clean Air feature is activated DEFROST indication lamp For cooling amp heating models only Lights up ofl when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating operation OPERATION indication lamp This lamp illuminates when the air conditioner is in operation TIMER indication lamp Lights up during Timer operation Temperature indicator Displays the temperature settings when the air conditioner is operational Displays the malfunction code wf In gt 27 8 3 Main Protection 8 3 1 Time delay at restart for compressor 1 minute delay for the 1 time start up and 3 minutes delay for others 8 3 2 Temperature
31. losion B Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode EB Ifthe liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote of the batteries have leaked 2 Function Model Names of Indoor Outdoor Units Capacity Indoor units Outdoor units ok MS11MU O9HRFN1 QRDOW MOC 09HFN1 QRDOW MS11M O9HRFN1 QRD1W A MOC O9HFN1 QRD1W En MS11MU 12HRFN1 QRDOW MOC 12HFN1 QRDOW 12k MS11M 12HRFN1 QRD1W A MOC 12HFN1 QRD1W MS11MU 12HRFN1 QRDOW B MOC1 12HFN1 QRDOW 18k MS11MU 18HRFN1 QRC8GW MOC 18HFN1 QRC8W DC 24k MS11M1 24HRDN1 QRC8W MOF 24HFN1 QRC8W Inverter Filter iller Of Formaldehyde lonizer O Silent mode O Plasma O Horizontal amp Vertical Swing Function O Silver Ico Filter O Louver Position Memory Function Vitamin C Filter O Refrigerant Leakage Detect 3M HAM Filter O Self diag Function Bio Filter O Hydrophilic Aluminum Fin Golden Fin O Anti rust Cabinet Self Clean O Valve Protection Cover Follow Me O PTC Heating Belt O 1W Standby Compressor Crankcase Heater O O optional function 7 3 Dimension 3 1 Indoor Unit
32. lves Low side on the charge set and charge the system with liquid refrigerant 19 6 When the electronic scale displays the proper weight refer to the table disconnect the charge hose from the 3 way valve s service port immediately and turn off the air conditioner before disconnecting the hose 7 Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 6 5 Adding the refrigerant after running the system for many years Charging cylinder Electronic scale Procedure 1 Connect the charge hose to the 3 way service port open the 2 way valve and the 3 way valve Connect the charge hose to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 20 6 When the electronic scale displays the proper weight refer to the gauge and the pressure of the low side disconnect the charge hose from the 3 way valve s service port immediately an
33. minutes according to the outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below 31 T1 Ts C 4 3 5 Dn A 1 4 3 0 4 we Pai 25 B we PO Pd 2 0 mn 1 5 2 p E A 1 0 p 0 5 l E ee g 4 0 0 6 _ lt lt ee cH p 4 1 0 1 5 YJ While the zones of A B C are corresponding to different compressor running frequency Note When T1 Ts keeps in the same temp zone for 3 minutes the compressor will run as the below rules A Increase the frequency to 3 grade higher until to FREMAX B E Increase the frequency to 2 grade higher until to FREMAX F G Increase the frequency to 1 grade higher until to FREMAX H Keep the current frequency l Decrease the frequency to 1 grade lower until to F1 J Run at F1 for 1h if T1 Ts lt 2 C the compressor will stop Meanwhile the compressor running frequency is limited by the current T4 CoolT4Zone5l 50 49 CoolT4Zone4 45 44 X 4 CoolT4Zone3l 40 33 CoolT4Zone2l 1 CoolT4Zone1 32 8 4 2 2 Outdoor fan running rules Cooling a 4 U A 28 26 B 25 23 22 20 19 KS 17 E While A B C means different fan speed of outdoor unit 8 4 2 3 Indoor fan running rul
34. n 10m _ 308 xx 60 40 8 4 3 5 Evaporator coil temperature protection T2 4 of TEstop Decrease TEdown Hold TEnorm Resume Off Compressor stops Decrease Decrease the running frequency to the lower level Hold Keep the current frequency Resume No limitation for frequency 8 4 4 Auto mode This mode can be chosen with remote controller and the setting temperature can be changed between 17 307 In auto mode the machine will choose cooling heating or fan only mode according to AT AT T1 Ts Indoor fan will run at auto fan of the relevant mode The louver operates same as in relevant mode If the machine switches mode between heating and cooling the compressor will keep stopping for 15 minutes and then choose mode according to T1 Ts If the setting temperature is modified the machine will choose running function again 8 4 5 Drying mode 8 4 5 1 Indoor fan speed is fixed at breeze and can t be changed The louver angle is the same as in cooling mode 8 4 5 2 Compressor running rules 41 T1 Ts 4 F7 god i 201 1 0 0 5 nn nn i F3 Z 0 0 FA 8 4 5 3 Low indoor room temperature protection In drying mode if room temperature is lower than 10 C the compressor will stop and not resume until room temperature exceeds 12 C 8 4 5 4 Evaporator anti freezing protection condenser high temperature protection and outdoor unit frequency limit are
35. ncy to the 1 grade lower until to F1 J Run at F1 for 1h if T1 Ts AT gt 6 C the compressor will stop 36 Meanwhile the compressor running frequency is limited by the current T4 l 4 _ HeatT4Zone4l 15 i ___HeatT4Zonegl 10 f 9 0 HeatT4Zone2l 6 0 HeatT4Zone1 8 4 3 2 Outdoor fan running rules Heating 14 21 19 18 16 15 13 12 8 4 3 3 Indoor fan running rules In heating mode indoor fan can be selected as high medium low auto and silent The anti cold wind function is preferential The running rules of anti cold wind function depend on both T1 and T2 that is more comfortable control When the compressor is running the indoor fan is controlled as below 37 Setting fan 47 Actual fan speed speed es H H H G ae en Gee M M M Z M M M M M M Z L L L D If the compressor stops caused by the room temperature rising the indoor fan will be forced to run 127 seconds with breeze During this period the anti cold wind is disabled Auto fan action in heating mode 1 T1 TstAT l 0 0 1 0 i 20 Se H L 0 2 L a Gm H L 0 4 L 3 0 1 Run H L 0 6 L 56 H L 0 6 L 6 0 H L 0 8 L 6 5 1 H 38 8 4 3 4 Defrosting mode Condition of defrosting If any one of the following items is satisfied AC will enter the defrosting mode After the compressor starts
36. of the fuse or switch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch 6 3 Pipe length and the elevation The pipe length and refrigerant amount Standard Max Additional length Elevation t refrigerant Liquid m B m MS11MU 09HRFN1 QRDOW MOC 09HFN1 QRDOW MS11M 09HRFN1 QRD1W A MOC 09HFN1 QRD1W MS11MU 12HRFN1 QRDOW MOC 12HFN1 QRDOW MS11M 12HRFN1 QRD1W A MOC 12HFN1 QRD1W MS11MU 12HRFN1 QRDOW B MOC1 12HFN1 QRDOW MS11MU 18HRFN1 QRC8GW MOC 18HFN1 QRC8W MS11M1 24HRDN1 QRC8W MOF 24HFN1 QRC8W Indoor unit Indoor unit Outdoor unit Caution The capacity test is based on the standard length and the maximum permissive length is based on the system reliability The oil trap should be installed per 5 7 meters 16 6 4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrigerant circuit may freeze and block capillary tubing Water may lead to corrosion of parts in the refrigerant system Therefore the indoor units and the pipes between indoor and outdoor units must be leak tested and evacuated to remove gas and moisture from the system Gas leak check Soap water method Apply soap water or
37. outdoor unit rated current If used as MULTI unit L 1 on the terminal block does not need to be connected 202032591215 OPT ONAL OPTIONAL he brt 5 2 Outdoor Unit MOC 09HFN1 QRDOW MOC 09HFN1 QRD1W MOC 12HFN1 QRDOW MOC 12HFN1 QRD1W MOC1 12HFN1 QRDOW MOC 18HFN1 QRC8W 202037391220 EXPANSNE VALVE BLACK DISCHARGE SENSOR OLP TEMP SENSOR C i CE KFR26W BP3 PFC 120 D 13 MP 2 j B ai TO INDOOR UNIT power SUPPLY ifo CN7 peers en ij NOTE Four way valve Seema CM Sa is used in the i Cooling amp Heati OPTIONAL HEATER i Ne hee her Demma CE OUTDOOR WIRING DIAGRAM REACTOR R1005 R20035 MOF 24HFN1 QRC8W 202038090849 OUTDOOR AMBIENT ET TEMPERATURE SENSOR NSER TEMPERATURE SENSOR 2 yet TO INDOOR UNIT POWER SUPPLY 6 Installation Details 6 1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque mm inch N cm N cm 06 35 1 4 1500 153kgf cm 1600 163kgf cm 9 52 3 8 2500 255kgf cm 2600 265kgf cm 012 7 1 2 3500 357kgf cm 3600 367kgf cm 015 9 5 8 4500 459kgf cm 4700 479kgf cm 619 3 4 6500 663kgf cm 6700 683kgf cm 6 2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet Rated current of appliance Nominal cross sectional area mm gt 6 and lt 10 The cable size and the current
38. pen circuit or short circuit of temperature sensor diagnosis and solution E4 E5 F1 F2 F3 Check the connections between temperature No Correct the connections sensor and PCB Are the connections good Yes Check the resistance value of the sensor via table Yes gt Replace indoor or outdoor PCB and table 2 is it normal No Replace the sensor and check if the problem happen again 52 9 2 5 Refrigerant Leakage Detection diagnosis and solution EC Shut off the power supply and turn it on 5 seconds later Is it still displaying the error code Yes t Is there cool air blowing out from indoor air outlet No r Is there any leakage Especially the connection parts such as the gas valve and the liquid valve No Yes Yes Check if T2 sensor is well fixed Correct the installation or replace T2 sensor Does the problem remain again Yes y Replace indoor PCB Is there any block ing Such as the capillary or the welded points of the pipes Yes y Clear the blocking Repair the leakage and recharge the refrigerant 53 9 2 6 IPM malfunction or IGBT over strong current protection diagnosis and solution PO Check if the wiring between main PCB and comp
39. ressor connected by Romeck the connecHon Yes gt replace the wires and error and if the wires and connectors connectors are broken No y Correct the installation Check if the IPM installed correctly No gt tighten the screws and apply silicon grease Yes y IPM continuity check Check if the Replace the IPM board or replace IPM terminal resistance values are No gt the main PCB if the IPM board and uniform main PCB are integrated together Yes Refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved Check if the outdoor fan runs properly or the outdoor unit No gt ventilation is good Yes Check if the compressor resistance values are uniform Yes t Replace the outdoor main PCB if the main PCB and IPM are separate No gt Replace the compressor 54 9 2 8 Over voltage or too low voltage protection diagnosis and solution P1 Check if the power supply is No normal Yes Check if all the connections N 0 and wires are good Yes Power on and when the unit is in standby check if the voltage between P and N is around DC 310V or 340V or 380V For different kinds of units the voltage differs No Disconnect the unit with power supply and try to restart the unit when power supply gets normal sl Correct the connections or replace the wires
40. roduct Corrosion particularly on the condenser and evaporator fins 5 could cause product malfunction or inefficient operation gt Operational B Do not expose the skin directly to cool air for long time Do not sit in the draft B Do not use the product for special purposes such as preserving foods works of art etc It is a consumer air conditioner not a precision refrigerant system There is risk of damage or loss of property B Do not block the inlet or outlet of air flow m 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 B Do not touch the metal parts of the product when removing the air filter They are very sharp B Do not step on or put anything on the product outdoor units m 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 B Do not insert hands or other objects through air inlet or outlet while the product is operated B Do not drink the water drained from the product B Use a firm stool or ladder when cleaning or maintaining the product Be careful and avoid personal injury B Replace the all batteries in the remote control with new ones of the same type Do not mix old and new batteries or different types of batteries There is risk of fire or exp
41. sor overload Open condition Define the evaporator coil temp T2 of the compressor just starts running as Tcool In the beginning 5 minutes after the compressor starts up if T2 lt Tcool 2 C does not keep continuous 4 seconds and this situation happens 3 times the display area will show EC and AC will turn off 29 8 4 Operation Modes and Functions 8 4 1 Fan mode 1 Outdoor fan and compressor stop 2 Temperature setting function is disabled and no setting temperature is displayed 3 Indoor fan can be set to high med low auto 4 The louver operates same as in cooling mode 5 Auto fan T1 24 ae cae 75 L 5 0 a H L 0 75 zen b lt H L 0 5 L 4 0 E a H L 0 25 L a 2 1 0 za 30 8 4 2 Cooling Mode 8 4 2 1 Compressor running rules The maximum operation frequency of compressor after starting submits to following rule 50 49 45 44 41 40 33 32 30 29 22 20 T4 l Fmax T4FREMAX1 Fmax T4FREMAX2 Fmax T4FREMAX3 Fmax T4FREMAX4 Fmax T4FREMAX5 Fmax T4FREMAX6 Fmax T4FREMAX7 Meanwhile the maximum frequency is limited by the indoor fan speed Indoor fan speed Maximum frequency High speed turbo function No limit Silent mode Fixed at F3 If users switch on AC by remote controller the compressor will run at the Fmax frequency for 7
42. ter reconnect the power wire Is the error still displaying after several minutes Yes Check all the wirings between indoor and outdoor indoor main PCB and outdoor main PCB following the wiring diagram Are all the wirings connected correctly Yes l Measure Vs is it moving alternately between positive value and negative value No Vs is the voltage between S and N of outdoor unit Yes v Is the wiring to the indoor main Is the wiring to the outdoor main PCB connected correctly PCB connected correctly Yes AA Change the indoor main PCB Yes y Change the outdoor main PCB v y Power on Is the error extinguished Power on Is the error extinguished No No y y Change the indoor main PCB Change the outdoor main PCB 48 9 2 3 Zero crossing detection error diagnosis and solution E2 Check if the connections and No power supply is normal Correct the connections Turn on the unit when the power supply is good Yes y Indoor main PCB is defective Replace indoor main PCB 9 2 4 Fan speed has been out of control diagnosis and solution E3 F5 Shut off the power supply and turn it on 5 seconds No later Is it still displaying the error code Yes t Shut off the power supply The unit operates normally
43. the resistance is not equal to each other the fan motor must has problems and need to be replaced Otherwise go to step 2 50 2 Power on and when the unit is in standby measure the voltage of pin4 5 in feedback signal connector If the value is not 5V change the PCB Otherwise go to step 3 3 Rotate the fan by hand measure the voltage of pin1 5 pin 2 5 and pin 3 5 in feedback signal connector If any voltage is not positive voltage fluctuation the fan motor must has problems and need to be replaced Index2 1 Indoor or Outdoor DC Fan Motor control chip is in fan motor Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must has problems and need to be replaced DC motor voltage input and output NO Color Signal Voltage 1 Red Vs Vm 280V 380V 2 z n ee 3 Black GND OV 4 White Vee 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V 2 Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed After running for 15 seconds measure the voltage of 0101 and pin2 If the value of the voltage is less than 100V 208 240V power supply or 50V 115V power supply the PCB must has problems and need to be replaced Input Terminal x ned N Red 1 Black 2 _ White White 3 O j C Black 51 9 2 4 O
44. up and keeps running mark the minimum value of T3 from the 10th minutes to 15th minutes as T30 1 If the compressor cumulate running time is up to 29 minutes and T3 lt TCDI1 T3 T30SUBT3ONE T30 2 lf the compressor cumulate running time is up to 35 minutes and T3 lt TCDI2 T3 T30SUBT3TWO T30 3 If the compressor cumulate running time is up to 29 minutes and T3 lt TCDI3 for 3 minutes 4 If the compressor cumulate running time is up to 120 minutes and T3 lt 15 C Condition of ending defrosting If any one of the following items is satisfied the defrosting will finish and the machine will turn to normal heating mode T3 rises to be higher than TCDE1 C T3 keeps to be higher than TCDE2 C for 80 seconds The machine has run for 10 minutes in defrosting mode 39 Defrosting action For MS11MU 09HRFN1 QRDOW MS11M O9HRFN1 QRD1W A MS11MU 12HRFN1 QRDOW MS11M 12HRFN1 QRD1W A MS11M1 24HRDN1 QRC8W Frequency Fa FrequencyF16 on Compressor off on 4 way valve off on T i Outdoor fan off on Indoor fan off 10s Indoor fan breeze 10s XX m 10s no longer than 10m __ 30s xx 60 For MS11MU 18HRFN1 QRC8GW Frequency F3 Frequency F16 on Compressor i n 4 way valve off on Outdoor fan off on me Indoor fan off 10s p Indoor fan breeze 10s p 10s r no longer tha
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