Service Manual
Contents
1. the unit will enter freeze prevention operation If indoor fan speed is at low or breeze level it will turn to medium speed automatically if indoor fan speed is at medium speed it will turn to high speed The air conditioner will exit Freeze prevention operation when Trc gt 10 C indoor fan motor runs at the set fan speed Compressor will stop running when it runs at least 10 minutes and Trc lt O C If the off time of compressor is for more than 6 minutes or 10 and the compressor stops running for more than 3 minutes Compressor and outdoor fan motor will restart working The air conditioner will exit Freeze prevention operation and indoor fan motor is running at the set speed 3 4 5 Heating overload working When T 2G indoor fan speed will turn to low level If T begins to descend when T H C and the time for fan speed transition is longer than 5 minutes then indoor fan motor returns to normal fan speed If T go on ascending when T ZI C then compressor stops and outdoor fan motor go on running Indoor fan 10 motor turns to low speed When T H C compressor indoor and outdoor fan motor return to normal running there is 3 minutes protection for compressor 3 4 6 Heating overload working not available for cooling only type air conditioner When Trc2A C the unit enters heating overload protection If indoor fan speed is set at low or breeze level it will turn to medium speed automatically if indoor fan s2. 5 the fan speed is 5 degree second 3 4 Heating Temperature control range 16 C 32 C Original value 24 C Temperature control precision 1 C Characters on control 4 way reversing valve opens When Ts 1 C compressor 4 way reversing valve and outdoor fan motor all open When 2275 1 compressor and outdoor fan motor both close Indoor fan motor is running at low level Manual Users can select the fan speed of high medium or low level as needed Auto When Ts 2 C high speed When Tr Ts 2 C medium speed Louver adjustment Manual vertical direction Set the blades position as needed Position 1 5 in figure 1 Auto vertical direction The range of sweeping is in position 1 4 fan speed is 5 degree second Compressor control The control circuit will stop compressor only after it has run at least 5 minutes Compressor can be restarted 5 minutes later the turn off 2 1 Fig 1 3 5 Fan sweep In this mode compressor 4 way reversing valve and outdoor fan motor all open Indoor fan motor can be set at high medium low level as needed Manual vertical direction Set the blades position as needed Position 1 5 in Figure 1 Fan sweep in vertical direction The range of sweeping is in position 2 5 in Figure 1 fan speed is 5 degree second 3 4 Protection function 3 4 1 Delay starting protection for the compressor Compress will restart working 3 minutes 5 minutes in HEAT mode later the turn o
3. BOARD 32 FAN MOTOR CAPACITANCE ow sje _ 19 5 Refrigerant Flow Diagram Outdoor unit Indoor unit BE i d Ei toot x E 5 Capilary tube E voi Service valid Thermal insulating of refrigerant pipeline Tube Diameter Narrow tube 6 35 Wide tube 12 7mm To prevent heat loss and condensed water from dropping on the floor the wide and narrow tube of air conditioner should be wrapped with thermal insulating materials For using capillary tube and the tubes are in low temperature the thickness of thermal insulating materials shall be more than 8mm More than 8mm Thermal insulating materials More than 8mm Wide tube Narrow tube 20 6 Circuit Diagram 6 1 Electrical wiring diagram for indoor unit Warnl To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts 11111 6 2 Electrical wiring diagram for outdoor unit Warning To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts 21 7 Troubleshooting 7 1 Check before troubleshooting Warning High voltage will result in electric shock or death Always cut off the power before checking and maintaining 7 1 1 Check power line To check whether the power line is connected correctly to the terminal No 1 whi
4. control Auto When Tr Ts 2 C high speed When Ts TrsTs 2 C medium speed When TrsT low speed Manual Users can select the fan speed of high medium or low level as needed when the air conditioner is in the turn on status Louver adjustment Manual vertical direction Set the blades position as needed Position 1 5 in figure 1 Auto vertical direction The range of sweeping is in position 2 5 swinging speed is 5 degree second 3 3 Dehumidification Temperature control range 16 C 32 C Temperature control precision 1 Characters on control 4 way reversing valve closes When Tr Ts 2 C the running mode is the same to the cooling operation When Ts 1 C lt Ts 2 C compressor and outdoor fan motor run continuously And indoor fan motor runs at low fan speed When 15 C Tr Ts 1 C compressor and outdoor fan motor are working according to 3 minutes working alternating with 9 minutes stopping Indoor fan motor runs at low fan speed when compressor is running and it runs at breeze level for 30 seconds later the turn off of compressor 30 seconds later fan 8 motor will turn off When Tr lt 15 C indoor and outdoor fan motor will stop running louver blades vertical direction can t be controlled Manual operation in vertical direction When necessary users can select the position of louver blade in position of 1 5 in Figure 1 Fan sweep in vertical direction The range of sweeping is in position 2
5. more than 27 minutes b Toc lt 5 for more than 20 seconds Note When the system has entered heating overload protection and has not existed from protection the unit can not enters defrosting Users can only test defrosting conditions after existing from protection for 3 minutes 11 3 4 7 2 Defrosting Compressor and outdoor fan motor will stop working after the unit entering defrosting running 5 5seconds later 4 way reversing valve will close Another 5 seconds compressor starts running When the time of the compressor running is for more than 8 minutes Toc235 C compressor stops 55 seconds later 4 way reversing valve will open Another 5 seconds later compressor and outdoor fan motor will restart working and exit defrosting operation In defrosting operation the time of compressor running is at least 3 minutes Cool airflow prevention and blowing residue heat are both effective 3 4 8 Testing codes Code 1 is to set test run Not effective for SMART mode and DEHUMIDIFICATION mode After entering testing run no matter what is the set temperature or indoor temperature the unit will run as the set cooling or heating mode and will also not detect stopping condition The max running time is 60 minutes Code 2 is to set fast testing Code 3 is to set auto diagnosis Code 4 is to cancel the above setting There only can be one setting each time in the tests above 3 4 9 Failure code display and prote
6. motor coil Replace indoor fan motor Yes Check the resistance of transformer coil No Replace transformer 7 2 2 The indoor and outdoor units do not work Check the rated power of fuse Check power supply 1 Power failure Yes 2 Check the breaker Check if something residue cover on transmitting part of the remote controller No Check if infrared receiver on indoor unit is dirt No Yes Check fuse on indoor PCB Ass y No Parts of indoor PCB Ass y or Check the resistance of indoor fan motor coil Measure the resistance of compressor coil Measure the resistance of power transformer switches are defective 23 7 2 3 Only outdoor unit does not work Check the set 1 The set temperature is too high in cooling Adjust the set temperature 2 The set temperature is too low in heating temperature Measure the voltage between terminal No 1 and Outdoor unit No 2 on the terminal block is defective No voltage indication PCB Ass y of indoor unit is defective 7 2 4 Indoor unit does not work Indoor PCB Ass y is defective 7 3 Some parts of the air conditioner do not work 7 3 1 Only indoor fan does not work Check the fan rotation the fan cover Ok Measure the resistance of motor coil Check if fan motor is broken Ok or foreign matter in bearing Check the capacitor of fan motor 7 3 2 Only louver motor does not run No Measure the resistance of th
7. overload protection and Indoor fan motor will operate at low level for 80 seconds When lt 32 the louver is in position 5 The fifth situation If the unit has the function of starting up automatically when the electricity comes again the unit will judge before the starting of compressor When C the indoor fan motor will run at low level and the louver is in position 5 When Trcx25 C the indoor fan motor will stop The unit will enter freeze prevention operation after the compressor starts 2 6 Operation for dryness enzyme prevention When the unit is turned off in cooling mode the indoor unit will continue run in low fan speed for about 3 minutes to remove the partial moisture in the room 2 7 Compensation for temperature When enters heating operation the indoor temperature will decrease 3 C automatically 3 3 Operating mode 3 1 SMART operation The unit will judge the operation mode automatically after receiving the SMART signal 3 1 1 When Tr224 C turns on the unit in the original condition the unit will turn into cooling mode When 20 C Tr 24 the unit will turns into airflow mode When Trx20 C the unit will turns into heating mode In airflow mode when in the condition that it is necessary for cooling or heating more than 1 minute the unit will turn into cooling or heating mode 3 1 2 The fan speed is at auto mode and adjustable the display will change accordingly Note If choosing the airf
8. will display all settings if remote control signal is received again and only display run indicator after receiving the last signal from remote controller 30 seconds later Note The content LBD displays The screen displays actual operation mode of the unit 3 5 5 Air refresh function Press air refresh button when the unit is in off status the unit will switch on Indoor fan motor runs at the set fan speed air refresh outputs Press this button again air refresh function is cancelled and the unit will turn back to the original mode Press air refresh button if the unit is running air refresh indicator will light and air refresh output Press this button again air refresh function is cancelled and the unit will turn back to 13 the original running mode 3 5 6 Quiet Operation Press QUIET button when air conditioner is FAN SWEEP status the indoor fan will run at low level Press AIR REFRESH button when air conditioner is in off status and set fan speed as quite mode the indoor fan will run at low level In other status the indoor fan runs at low level 3 5 7 Restoration function optional To install E7PROM users do not have to program first and then assemble As long as installing E PROM the unit will have the restoration function after electricity comes again 3 5 8 Restoration optional Mode Fan speed On Off status Dew prevention symbol Fan sweep symbol Sleep symbol Quiet symbol A
9. SPLIT TYPE AIR CONDITIONER Service Manual AA 2710 CONTENTS T Range amp Conditions creed tu tiq e i btt tee 2 As Operating Range ottica tete hm the ie EO 2 1 2 Operating Conditions eene E rennen 2 2 5 eee mener nennen nennen nnn 3 2 1 Unit Specifications ssssssssssssessseeeeneeeeneeen enne n nenne nennen nene 3 2 2 Specifications of main enne 3 2 3 Specifications of other parts 5 3 Control Specifications eem eene 6 C edt doge etes s ar 6 9 296 Hi P pr dee ture Dee 6 3 9 Operating Inod6 te ete ete Eee ener cele A pae eet 7 3 4 Protection functiOn iei b pends nti t Ra ER ee RE A RNV XR ER Eee uua o 10 3 5 Other 12 4 Exploded ed 16 4 1 Exploded view for indoor 16 4 2 Exploded view for outdoor 18 5 Refrigerant Flow ener nnne
10. UH symbol Air refresh symbol Set temperature Louver position 3 5 9 The second function button The second function for AIR REFRESH button Press AIR REFRESH button and hold on and finish the test condition after 5 seconds When entering this mode the original value is 00 for each entry The second function is only effective for temperature control button on off button and air refresh button Other buttons are not effective for the second function The second function for AUH button Press button and hold on for 5 seconds the unit will enter dew prevention function At the same time the unit gives a buzz sound This button is only effective in Cooling and Dehumidification mode Users can set or cancel this function by pressing this button Y2 model gives tacit consent automatically to start dew prevention function 3 5 10 Demonstration Mode Blank unit When electrified the unit runs at medium level if the unit has not received the signal from remote controller 14 Pause indicator lights 1s running indicator lights 1s timer indicator lights 1s air refresh indicator lights 1s Pause indicator lights 1s The display screen displays every 11 22 33 44 55 66 77 88 99 00 1s circularly After receiving the signal from the remote controller the unit will operate by the signal During the courts of demonstration all signals of outdoor unit are ineffective 3 6 T
11. arge power ROAD LAE EN RO ERR End ERA ERO ANM a C ERA EAS Refrigerant is not enough Filling it Refrigerant Capillary tube is blocked Replace it flow is not enough Compressor is in error Replace it Service valve is not open Open it completely completely Air circulating The air filter is blocked Clean it capacity is not enough Fan running speed Change it to high or is at low medium Connection between indoor Wide and narrow tubes and outdoor units is in poor are thermal insulated thermal insulated separately Cooling airflow m iprotector is no use 7 4 3 Over cooling or heating Check the set temperature 7 5 Sensor is defective Check reference 3 4 8 26 8 Checking Electrical Components 8 1 Measure insulation resistance p The insulation is in good condition if the resistance exceeds 2 MO il A Insulation 8 1 1 Power supply wires Clamp the ground pins of the power plug with the lead clip of insulation resistance tester and measure the resistance by placing a probe on either of the power wires Fig 1 DNE Va Probe Then measure the resistance between the ground wire and the other power wire Fig 1 8 1 2 Indoor unit oes SS se metallic part Fig 2 Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by pla
12. ch is on the terminal block of the indoor unit Brown Blue NE e Yellow Green gt CT 51 ies Ko Vcr 7 1 2 Check unit wiring To check whether the inter unit wires are connected correctly 7 1 3 Check power supply To check whether the power supply is in the specified range 7 1 4 Check connector and lead wire of indoor and outdoor units To check whether the insulating cover of the lead wire is damaged To check whether the lead wire and the connector are connected well To check wires 7 2 The air conditioner does not work 7 2 1 Leakage protector is open or fuse is burnt A Setting leakage protector to ON it opens immediately can not reset There is possibility of ground fault Check insulation resistance The insulation resistance shall be more than 2M Q9 22 B Leakage protector is OFF Disconnect unit wires from terminal block of Poor insulation performance outdoor unit And measure insulation Measure the insulation resistance of resistance of outdoor unit the electric parts of outdoor unit Disconnect unit wires from terminal block of Poor insulation performance indoor unit Unplug the unit and measure Measure the insulation resistance of the insulation resistance of indoor unit the electric parts of outdoor unit C The fuse is open in several minutes after turning air conditioner on Replace it with a proper one Yes No 7 Check the resistance of indoor fan
13. cing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the 2 check Copper 8 1 3 Outdoor unit Clamp a metallic part of the unit with the lead clip of the o Insulation Fig 3 insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate Fig 2 f en nd Note s Probe 1 Refer to electric wiring diagram oN 1 If the probe can t enter the poles because the hole is too narrow then use a probe with a thinner pin Fig 4 8 1 4 Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the desired electric part from terminal plate capacitor etc Similarly disconnect the connector Then measure the insulation resistance Fig 3 and 4 27 8 2 Checking continuity of fuse on PCB Ass y Remove the PCB ass y from the electrical component box Then pull out the fuse from the PCB ass y Fig 5 Check for continuity using a multimeter as shown in Fig 6 8 3 Checking motor capacitor Remove the lead wires from the capacitor terminals and then place a probe on the capacitor terminals as shown in Fig 7 Observe the deflection of the pointer setting the resistance measuring range of the multimeter to the maximum value The capacitor is g
14. ction A Temperature can be checked by codes code 11 displays room temperature code 12 displays indoor pipe temperature code 13 displays outdoor pipe temperature B Code 14 displays abnormal information EO displays normal operation P2 displays heating overload P3 displays freeze prevention protection F1 The circuit of room temperature sensor is damaged or abnormal F2 Indoor pipe C The circuit of room temperature sensor is abnormal Pause light flashes and the unit stops D The circuit of indoor pipe temperature sensor is abnormal Timer light flashes and the unit stops E The circuit of outdoor pipe temperature sensor is abnormal Run light flashes and the unit stops 3 5 Other functions 3 5 1 Auto diagnosis The Auto diagnosis functions are in the following steps Buzzer beeps 1s no output 0 5s running indicator lights 0 5s pause indicator lights 0 5s timer indicator lights 0 5s air refresh indicator lights 0 55 running compressor on 0 5s outdoor fan motor 0 5s 4 way reversing valve 0 5s AUH 0 5s indoor fan motor high level 0 5s indoor fan motor medium level 0 5s indoor fan motor low level 0 5s air refresh indicator lights 0 5s FLAP a 0 5s FLAP b 0 5s FLAP c 0 5s FLAP d 0 5s no output 0 5s all output 1s 3 5 2 Time reducing 12 The CPU runs as 60 times as the former speed There is no timer reducing function within 1 minute 3 5 3 AUH A Starting conditions for AUH a Havi
15. e louver motor coil Replace louver motor Ok To check whether the butt plugs of louver motor No Not rotate Check if foreign matter is in Plug well are connected well Ok Integrate circuit ULN2003 is defective 24 7 3 3 Only outdoor fan motor dos not run Not rotate Check the fan rotation Check if foreign matter is in Ok Measure the resistance of motor coil Ok the fan cover Check if fan motor is broken or foreign matter in bearing 7 3 4 Compressor does not run Overload protector activates The temperature of compressor is too high Refrigerant is not enough Fill it No Rotor may be blocked 7 4 Air conditioner operates but abnormalities are observed 7 4 1 Poor shifting between cooling and heating inapplicable for cooling only type Remote controller may be defective Measure the resistance of 4 way reversing valve coil Cooling Heating Measure the voltage between terminal No 5 and No 2 Four way reversing on the outdoor terminal block Adding 6 W loading in valve is defective measuring No voltage indication PCB Ass y of indoor unit is defective 25 7 4 2 Poor cooling or heating phenomena Poor cooling Is the temperature Change the set temperature heating set properly performance The heating cooling Reduce heat cool source or change load is too large the air conditioner with l
16. emperature table of protecting point MODEL A B C D E F G I J K L IM AA 2710 54 57 48 46 34 42 28 53 41 28 53 43 53 15 4 1 Exploded view for indoor unit 4 Exploded view 16 No NAME OF PART No NAME OF PART 01 AIR FILTER 25 DISPLAY BOX 02 COVER OF ELECTRIC CONTROL BOX 31 VAPORATOR 03 WALL MOUNTING PLATE 32 ADIABATIC BUSHING 04 TUBE PLATE 41 AIR GUDING BRACKET 05 TUBE PLATE 42 CONNECTING BAR 06 BOTTOM FRAME SUBASSEMBLY 43 AIR GUDING BLADE 07 LEFT BRACKET 44 FLAP 08 BEARING SUBASSEMBLY 45 STEP MOTOR 09 CROSS FAN 46 DRAINAGE PIPE 010 FAN MOTOR 51 ELECTRIC CONTROL BOX 011 RIGHT BRACKET 52_1 P C B 11 FRONT PANEL 52 2 P C B 12 DISPLAY WINDOW 53 CONNECTION TERMINAL BOARD 21 MEDIAL FRAME 54 POWER CORD 22 DISPLAY BOARD 56 TRANSFORMER 23 BOLT COVER 57 REMOTE CONTROL 24 DI SPLAY BOX COVER 17 4 2 Exploded view for outdoor unit TTE gee 2j V D 18 No NAME OF PART No NAME OF PART COVER PLATE RIGHT HANDLE 02 CONDENSER ASSEMBLY 21 MOTOR BRACKET CAPILLARY ASSEMBLY FAN MOTOR 06 COMPRESSOR ELECTRIC CONTROL BOARD 07 MOUNTING
17. ff of compressor or power off to keep the pressure balance of the cooling system 3 4 2 Cool airflow prevention In heating operation the time for compressor running or stopping can not be longer than 5 minutes When the unit is in operation and the compressor has not been started yet Tre F C then indoor fan motor runs at low level blades is at position 5 and can not be controlled When Trcx 25 C the indoor fan motor stops In operation if compressor has been turned on and running time is no longer than 5 minutes A If Trc F C indoor fan motor stops B 6 indoor fan motor runs at low level C Trce gt 36 C indoor fan motor runs at the set level Note As long as comes into A condition the unit will not enter A condition even if temp drops As long as comes into C condition the unit will not enter B condition even if temp drops Louver blades will come to 5 position automatically and not controllable During cool airflow prevention period PAUSE red indicator will light 3 4 3 Dew prevention cooling amp dehumidification mode When the louver blades are at the position 1 2 5 as shown in Fig 1 for at least 15 minutes the blades will come back to 3 position automatically and now the position for louver blades can be adjusted Note There would be no dew prevention when at high airflow level 3 4 4 Freeze prevention To prevent indoor heat exchanger freezing in COOL and DRY operation When Trcx 3
18. ing Conditions Indoor Temperature Outdoor Temperature Tubing Length m rtu NN NN DB Dry bulb temperature WB Wet bulb temperature 2 Specifications 2 1 Unit Specifications Rated voltage 220V 60Hz single phase Electrical rating AA 2710 Voltage range 198 242V 60Hz single phase Controls Temperature control Microprocessor thermostat Control unit Control panel of indoor unit Air filter Anti mold washable 35 1 4 a Max pipeline length m diameter Wide tube mm 12 7 1 2 Data subject to change without notice 2 2 Specifications of main parts 2 2 1 Indoor unit Controller AA 2710 Controls Temperature control Fan amp Fan motor Data subject to change without notice 2 2 2 Outdoor unit Controller PCB Part No Compressor Safety devices Type B250 150 241E Fan amp Fan motor Fan type Propeller fan Fan motor model YDK36 6D 5 Data subject to change without notice 2 3 Specifications of other parts Indoor unit Transformer pO Indoor temperature KTEC 41 C12 Thermal resistor Coiled pipe KTM 41 C9 Resistance temperature 25 C 10 Power supply length m 1 5 1 0 cross section P Rated value 10A 250VAC Power relay G4A 1A E 12VDC Or JQX 102F 012 Coil rated voltage 12V d c 12V d c Current coil resistance 20 C 2000 300 2 JZC 32F 012 1H1 Data subject to change without notice 3 Control Specifications 3 1 Sy
19. low mode the auto airflow is set to be at low level automatically 7 3 3 3 The airflow direction is swing and adjustable and the display will change accordingly 3 3 4 All output air refresh AUH air ventilate etc is effective 3 3 5 In cooling mode the original set temperature is 5 and 22 lt 15 lt 27 then the master unit will not change operation mode when the unit enters cooling mode If users want to change working condition by remote controller in case the condition will not conflict with the master unit mode such as cooling mode conflicts with AUH mode the master unit will operate and display in new condition set by remote controller 3 3 6 In heating operation when the temperature Ts Tr 8 C 16 CSTss22 C then the master unit will not change operation mode when the unit enters heating mode If users want to change working condition by remote controller in case the condition will not conflict with the master unit mode the master unit will operate and display in new condition set by remote controller 3 2 Cooling Temperature control range 16 C 32 C Original value 24 C Temperature control precision 1 C Characters on control 4 way reversing valve closes When Tr2Ts 1 C compressor runs When Trx Ts 1 C compressor stops The control circuit will stop compressor only after it has run at least 5 minutes The compressor can be restarted 3 minutes later the turn off Fan speed
20. ng received starting AUH signals from remote controller b In the heating mode c The build up time of compressor is more than 3 minutes d Tr lt 18 C e Ts Tr23 C f Indoor fan motor is running at medium or high level B The AUH function will be closed when meets any of the following conditions Trz18 C b Ts Tr lt 2 C c TrcZz A 2 C d Indoor fan motor stops running or runs at low level e Entering defrost running f Having received signals for closing AUH from remote controller Note If AUH stops working because of condition c users can restart AUH only on condition that indoor pipe temp lt E C and meet all conditions in A C Defrost when AUH is in operation If AUH is in operation or less than 10 minutes after closing indoor fan will continue running at low level for 30 seconds when entering defrosting D Switch off unit when AUH is in operation If AUH is in operation or less than 10 minutes after closing indoor fan will continue running for 30 seconds when switching off The other things are the same to the condition when switching off normally 3 5 4 Display function The central display screen does not display symbols if air conditioner is in off status but Timer indicator lights when in Timer mode In the checking and setting conditions the screen will also display the corresponding state of the unit Turn on the master unit the screen will only display run indicator after 30 seconds The screen
21. nnn 20 6 Circuit Di graMe nioa e atte deep 21 6 1 Electrical wiring diagram for indoor unit ssssssseeeeeen 21 6 2 Electrical wiring diagram for outdoor 21 22 7 1 Check before troubleshooting 22 7 2 The air conditioner does not 22 7 3 Some parts of the air conditioner do not 24 7 4 Air conditioner operates but abnormalities are observed 25 7 5 Sensor is defective Check reference 3 4 8 26 8 Checking Electrical Components ssssssssssessseeee eene enne 27 8 1 Measure insulation nennen nne 27 8 2 Checking continuity of fuse on PCB 28 8 3 Checking motor capacitor eene 28 1 Range amp Conditions 1 1 Operating Range Operating Modes Indoor Temperature Outdoor Temperature 32 C DB 23 C WB 43 C DB Cooling 21 C DB 15 C WB 21 C DB 1 2 Operating Conditions Rated Operat
22. ood if the pointer bounces to a great extent and then gradually returns to its original position The range of deflection and deflection time differ according to the capacity of the capacitor 28 Fig 5 Fig 6 Fig 7
23. peed is set at medium speed it will turn to high speed When TrcZ B C outdoor fan motor stops When indoor pipe temp drops to D C outdoor fan motor will restart working Air conditioner will exit overload protection when Trc drops to E C compressor restarts working Indoor fan motor runs at the set fan speed When TrczC Cand the build up time of compressor running is for more than 5 minutes compressor will be stopped When indoor pipe temp drops to E C outdoor fan motor will returns to normal running Note When entering heating overload operation louver blades are in position 3 and return to the original position 3 4 7 Defrosting 3 4 7 1 Defrost entry conditions Defrost condition has three branches which has something in common A Compressor is running Ww B Compressor has been running for more than 10 minutes Difference between the three branches A The first branch a When the temperature of indoor pipe begins to descend the sum of descending value has reached or exceeded 3 C and the temperature of indoor pipe will not go up in 3 minutes The build up time of compressor running is for more than 40 minutes TOC 1 C d TRC TR 18 C B The second branch a The build up time of compressor running is for more than 48 minutes b Toc lt 5 C c The present value is 3 C lower than the lowest value of Tocre in 12 minutes after the unit has started The third branch a The build up time of compressor running is for
24. running 1 hour in heating mode Note Display set temperature is unaltered When the air conditioner runs in sleep mode the Max indoor fan speed is set at medium level Note The fan speed is set to be at low level but the fan speed will turn into medium level when in freeze prevention mode 2 4 Unit type and Power Please refer to PIN function Note After changing the unit type the new unit type should be tested for the relevant function and protection differently according to different unit types 2 5 Blowing surplus energy function The first situation When the unit is turned off in heating operation the time for blowing surplus energy is 80 seconds When Trc 32 the louver is in position 5 Fan speed is at low level The second situation When the unit enters defrosting when in heating operation the time for blowing surplus energy is 30 seconds When Trc 32 the louver is in position 5 Fan speed is at low level The third situation In heating operation when the unit comes to the set temperature the compressor will stop When Trc lt 32 C the louver is in position 5 Fan speed is at low level The fourth situation In heating operation when the unit enters heating overload operation the compressor will stop Trczc C and the compressor continues working for more than 5 minutes the compressor stops and blow surplus energy When the temperature of indoor pipe drops to E C the unit will exist from
25. stem source 1 1 Signal input Temperature sensor signal indoor temperature indoor coiled temperature outdoor coiled temperature remote control signal key input 1 2 Signal output LED X4 SI SCK RCK or air refresh operation pause timer louver motor a b c d buzzer compressor 4 way reversing valve indoor fan motor H L outdoor fan motor AUH air refresh and other assistant functions 3 2 Control functions 2 1 Switches input Press the Emergency button on the panel when the air conditioner is in the off mode then the unit will be turned on and work in the SMART mode Press this button again when the unit is running including test run or in SMART mode the air conditioner will be turned off Note All the displaying will disappear when turn off the air conditioner by pressing the Emergency button 2 2 Timing off Timing off function is only effective when the air conditioner is running The indoor unit will display TIMING when this function is effective The unit will be turned off at the set time and TIMING signal will disappear When the user turn off the unit ahead of the set time by remote controller or Emergency button the Timing off function will be canceled Note The set time for Timing off is 1 8 hours 2 3 Sleep mode When the sleep mode is set by remote the set temperature will increase 1 C after running 1 hour in Cooling or Dehumidifying mode Temperature will decrease 1 C after
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