Service Manual
Contents
1. PREMIER SPLIT TYPE WALL MOUNTED AIR CONDITIONER Service Manual AA 2119 Service Manual CONTENTS 1 Range amp Conditions S redibit dde 2 1 1 Operating Range nnn nnnnnrnnnnnnennensnneenenensenvenenennenvennnnenvennnnnnevennnnenenennnannenennnnenne 2 1 2 Operating 2 2 Specifications istas ara dl da Ra Ka poa enkraag 3 2 1 Unit Specifications eeeeeeeeeeee eene eee eioen ra enne nnne nnn nnnm nain nnn nanus 3 2 2 Specifications of main eee nennen nnne nnne nnn nnn 4 2 3 Specifications of other parts 6 3 Control Specifications ERR SEPA DE 7 NECEM 7 3 2 Control FUNCTIONS 7 3 3 Operating mode issena danena amaaa nan dsad vanden nansenenadedeneetensdnksnadansateradwernaden 8 3 4 Protection function annen neenenneeenennnnnevennnnenvennnnenvennnnnnenensnneenenennenvenennnnennenn 10 3 5 Other TUNCHONS wis sszonsan soad zersaracedensne amen arao pann aa asada End Tan Ia DIR aa aded 12 3 6 Parameter table 14 4 Dmmersiobal DAE 2 Ux C DEF RAN Id Las Dui aC RE UA QUAS Gu OE LONE taie 15 5 Performance2. Indoor Temperature Outdoor Temperature Max Operating Value Indoor Temperature Outdoor Temperature Tubing Length m 4 0 DB Dry bulb temperature WB Wet bulb temperature Service Manual 2 Specifications 2 1 Unit Specifications Rated voltage amp Power 220V 60Hz single phase Performance Rated capacity Btu h 9000 Air circulation High m h 420 Moisture removal High Electrical rating Cooling 198 242 4 80 1000 2 64 Voltage range Operating current Power input E E R lt Controls Temperature control Control unit Timer Microprocessor thermostat Infrared remote control transmitter KK22B OFF 8 hours High Medium Low Auto Auto single speed Airflow direction Manual Remote control Air filter Anti mold washable Compressor Rotary type Hermetic Refrigerant R22 550 Refrigerant control Capillary tube Fan speed Indoor Outdoor Q Indoor dB A Noise Outdoor dB A Pipeline connection manner Max pipeline length Refrigerant tubing Narrowtube mm 6 35 1 4 diameter in Wide tube mm 9 52 3 8 Dimensions amp Weight Outdoor unit Height 245 430 Co e Flare Unit dimensions Width 760 Depth 183 245 Height mm 305 515 Package dimensions Width mm 845 735 7 5 Net weight kg 22 Data subject to change without notice Service Manual 2 2 Specifications of main parts 2 2 1 Indoor unit CHZ22G M1S or CHZ22G M1S K
3. Characters on control 4 way reversing valve opens When Trx Ts 1 C compressor 4 way reversing valve and outdoor fan motor all open When Tr Ts 1 C compressor and outdoor fan motor both close Indoor fan motor is running at low level When Trc Trc The indoor coiled temperature F C the air conditioner will enter into cool airflow prevention operation the PAUSE indicator will light indoor Fan motor control Manual Users can select the fan speed of high medium or low level as needed Auto When Tr 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 9 Service Manual 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 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 off of compressor or power off to keep the pressure balance of the cooling system 3 4 2 Freeze prevention To prevent indoor heat exchanger freezing in cool and dry operation When Trcx 3 C for 2 minutes the air conditioner will enter freeze prevention operation If indoor fan speed is at low or breeze level it will turn to medium sp
4. CHZ25G YS Remote controller KK22B C1 English status Quantity Diameter Length mm 1 97 583 Fan motor model RPS19H 8 Welling Pole Rotation of motor 4 1260 rpm 220V High speed Coil resistance Grey White 507 Ambient temp 20 C Q White PINK 85 5 Operating capacitor 1 F 450 VAC Front panel motor EN Heat exchanger Data subject to change without notice Service Manual 2 2 2 Outdoor unit Compressor Huarun C 1RT142H01AA Overload protector external B240 155 241E Compressor locked rotor amperes A Coil resistance Ambient temp 20 Q 2 75 5 4 55 Operating capacitor VAC 450 Fan amp Fan motor rr White Gray 202 Brown White 134 Coil resistance Ambient temp 20 C Type Internal protector Safety Operating device temp Operating capacitor Heat exchanger En External coating Powder spraying coating Data subject to change without notice Service Manual 2 3 Specifications of other parts Indoor unit Transformer TR DB48 220 A2214 Thermal resistor KTM 41 C9 Copper KTEC 41 C12 Plastic 0C 32 97K2 10 C 20 00 Resistance K 2 20C 12 51K2 25C 10 00K 2 30 C 8 048K 2 Power supply JUZ6 604 270 Power relay PR G4A 1A E 12VDC Or JZC 32F 012 1H1 JQX 102F 012 Coil rated voltage 12V d c 12V d c Coil resistance 20 C 200 2 300 2 Data subject to change without notice Service Manual 3 Control Specificati
5. and the build up time of compressor running is for more than 50 minutes TrcSA 1 C and Toc lt 2 C Toc The outdoor coil temperature B Not overload but Toc lt 17 C for 30 seconds The build up time of compressor running is for more than 25 minutes C The build up time of compressor running is for more than hours And Tocx 2 C for 5 minutes Trc lt G 2 C and Trczx Tr H CC The build up time of compressor running is for more than 1 5 hours And it reaches the condition of the unit stopping Toc drops blow 2 C for minutes overload or Toc lt 2 C and Trc lt G 2 C not overload E The build up time of compressor running is for more than 50 minutes Toc lt 2 C Trc drops atleast 3 C and TrcG C Tre lt Tr H C F Toc lt 2 C the temperature decreases 1 C every 6 minutes repeat for 3 times The build up running time is for more than 25 minutes Defrost entry conditions for the unit without outdoor pipe temp sensor A Indoor unit enters overload prevention and outdoor unit stops When outdoor fan motor runs for more than 10 minutes and the build up time of compressor running is for more than 50 minutes indoor pipe temp is below B When the build up time of outdoor fan motor is more than 3 hours and indoor pipe temp is below C Service Manual C When arriving at off condition the build up time of compressor is more than 1 5 hours and indoor pipe temp is below M C below N C when
6. A condition even if temp 10 Service Manual 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 5 Heating overload working not available for cooling only type air conditioner When Trc ZAC 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 speed is set at medium speed it will turn to high speed When Trc 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 Trc2C Cand the build up time of compressor running is for more than 5 minutes compressor will be stopped Note When entering heating overload operation users can adjust louver position fan speed and the set temperature 3 4 6 Defrosting not available for cooling only type air conditioner 3 4 6 1 Defrost entry conditions Judge defrosting condition after the compressor running for more than 10 minutes Defrost entry conditions for the unit with outdoor pipe temp sensor A Indoor unit enters overload prevention and outdoor unit stops When outdoor fan motor runs for more than 10 minutes
7. in overload protection D The build up time of compressor is more than 50 minutes Trc drops more than 3 C and Trc lI C Trc TrzK C E When not overloading Trc drops 1 C every 6 minutes and repeat 3 times continuously the build up time of compressor is more than 25 minutes Users can defrost as long as the unit meet one of the above condition 3 4 6 2 Defrosting Compressor indoor 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 or Toc 220 C and defrosting time is at least for minutes 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 7 Testing codes code 1 to set test run code 2 to set fast testing code 3 to set auto diagnosis code 4 to cancel the above setting There only can be one setting each time in the tests above 3 4 8 Temperature and failure code display A The defining of code refers to the following Code 11 room temperature code 12 indoor coil pipe temperature Code 13 outdoor coil pipe temperature B Code 14 abnormal information EO Normal ope
8. Charts 5 oorr in itera ira tns auri aaa bra suo aka PY Roo 18 6 Refrigerant Flow 19 Rec WsEricuM 20 7 1 Electrical wiring diagram for outdoor unit eee 20 7 2 Electrical wiring diagram for indoor unit eere 20 8 Troubleshooting REI TTD 21 8 1 Check before troubleshooting eese 21 8 2 The air conditioner does not 22 8 3 Some parts of the air conditioner do not work eee 24 8 4 Air conditioner operates but abnormalities are observed 26 8 5 Sensor is defective Check reference 3 4 8 cessere 27 9 Checking Electrical Components eere 27 9 1 Measure insulation resistance 27 9 2 Checking continuity of fuse on PCB nen 28 9 3 Checking motor capacitor ann aneesennnnenvenennenenensnneenensnnenvenenenneenennnnenvennnnnennenen 28 Service Manual Technical Data 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 EE
9. defective Measure the resistance of power transformer 8 2 3 Only outdoor unit does not work Check the set The set temperature is too high in cooling Adjust the set temperature temperature Measure the voltage between terminal No 1 and Outdoor unit No 2 on the terminal block 220 240V is defective No voltage indication PCB Ass y of indoor unit is defective 8 2 4 Indoor unit does not work Indoor PCB Ass y is defective 23 Service Manual 8 3 Some parts of the air conditioner do not work 8 3 1 Only indoor fan does not work Not rotate Check if foreign matter is in the fan cover Check the fan rotation Ok Measure the resistance of motor coil Ok Check if fan motor is broken or foreign matter in bearing Check the capacitor of fan motor 8 3 2 Only louver motor does not run No Measure the resistance of the louver motor coil Replace louver motor Ok To check whether the butt plugs of louver motor No Plug well are connected well Ok Integrate circuit ULN2003 is defective 8 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 Check the capacitor of the fan motor 24 Service Manual 8 3 4 Compressor does not run Check compressor capacitor Overload protector activa
10. djustment 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 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 Tr lt Ts 2 C compressor and outdoor fan motor run continuously And indoor fan motor runs at low fan speed When 15 C lt Tr lt Ts 1 C compressor and outdoor fan motor are working according to 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 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 Note Among four dehumidification modes if users want to change running condition then the unit must run for at least 3 minutes or in off status for at least 3 minutes Louver adjustment vertical direction The range of sweeping is in position 2 5 the fan speed is 5 degree second 3 3 4 Heating not available for cooling only type air conditioner Temperature control range 16 C 32 C Original value 24 C Temperature control precision 1 C
11. ead wires of the desired electric part from terminal plate capacitor etc Similarly disconnect the connector Then measure the insulation resistance Fig 3 and 4 9 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 5 Fuse a 9 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 good 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 tothe capacity of the capacitor Fig 7 28
12. eed 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 8 C indoor fan motor runs at the set fan speed Compressor will stop running when it runs at least 10 minutes and 2 If the off time of compressor is for more than 6 minutes or Trcz8 C 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 Note When entering Freeze prevention operation users can adjust louver position fan speed the set temperature 3 4 3 Dew prevention cooling amp dehumidification mode When the louver blades are at the position 5 as shown in Fig 1 for at least 15 minutes the blades will come back to 4 position automatically if in the 1 position it will come back to 2 position and the blades will come back to the original position Note There would be no dew prevention when at high airflow level 3 4 4 Cool airflow prevention not available for cooling only type air conditioner In heating operation compressor do not work longer than 5 minutes A If TrccF C inner fan motor will stop B FC T pipe temp lt 36 C the indoor fan motor will run at low speed C T pipe temp 36 the indoor fan motor will run at set speed Note As long as comes into A condition the unit will not enter
13. ill switch on Indoor fan motor runs at the set fan speed air refresh output When air refresh function is turned off 13 Service Manual the unit will turn back to the original mode Press air refresh button if Air conditioner is running air refresh will be functioned and the indicator will light 3 5 6 Quiet Operation Press air refresh button when air conditioner is in off status and set fan speed as quite mode the indoor fan will run at breeze In other status the indoor fan runs at breeze 3 5 7 Restoration function optional To install E PROM users do not have to program and assemble As long as installing E PROM the unit will have the restoration function after electricity comes again 3 5 8 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 display is 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 AUH 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 heating mode Users can set or cancel this function by press this button 3 6 Parameter table Temperature table of p
14. ls shall be more than 8 mm More than 8mm Thermal insulating materials More than 8mm Narrow tube 6 35 mm 1 4 Wide tube 9 52 mm 3 8 Wide tube Narrow tube 19 Service Manual 7 Circuit Diagram 7 1 Electrical wiring diagram for outdoor unit Warni To avoid electrical shock hazard be sure to disconnect power before rnin i 9 checking servicing and or cleaning any electrical parts 7 2 Electrical wiring diagram for indoor unit Ne EK 20 Service Manual 8 Troubleshooting 8 1 Check before troubleshooting Warning High voltage resur in electric shock or death Always cut off the power before checking and maintaining 8 1 1 Check power line To check whether the power line is connected correctly to the terminal No 1 which is on the terminal block of the indoor unit Brown 7 Blue NE 2 N V g Yellow Green m 4 5 8 1 2 Check unit wiring To check whether the inter unit wires are connected correctly 8 1 3 Check power supply To check whether the power supply is in the specified range 220 240V 8 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 21 Service Manual 8 2 The air conditioner does not work 8 2 1 Leakage protector is open or fuse is burnt Se
15. mode is set the set temperature will increase 1 C after running 1 hour in cooling or Dehumidifying mode Temperature will decrease 1 C after 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 Service Manual 3 2 4 Blowing surplus energy function The indoor unit will continue run in low fan speed no longer than 30 seconds after the unit is turned off when in the heating operation Note Except the AUH blows surplus energy function the unit will stop blowing surplus energy when the temperature of tube is below 35 C 3 2 5 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 3 3 Operating mode 3 3 1 SMART operation The unit will judge the operation mode automatically after receiving the SMART signal 3 3 1 1 When Tr224 C turns on the unit in the original condition the unit will turns into cooling mode When 20 C lt Tr lt 24 C the unit will turns into airflow mode When Trs20 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 cooli
16. ng or heating mode 3 3 1 2 The fan speed is at auto mode and adjustable the display will change accordingly Note If choosing the airflow mode the auto airflow is set to be at low level automatically 3 3 1 3 airflow direction is swing and adjustable and the display will change accordingly 3 3 1 4 All output air refresh AUH air ventilate etc is effective 3 3 1 5 In cooling mode the original set temperature is Ts Tr 5 C and 22 STsx27 C then the master unit will not change operation mode when the unit enters into 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 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 Tr Ts 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 control Auto When Tr Ts 2 C high speed When Ts TrsTs 2 C medium speed Service Manual 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 a
17. ons 3 1 System source 3 1 1 Signal input Temperature sensor signal indoor temperature 35 130 indoor coiled temperature 35 130 C outdoor coiled temperature 35 130 C optional remote control signal emergency switch input capacity heating or cooling input 3 1 2 Signal output Display signals SI SCK RCK or air refresh operation pause timer louver motor 1a 1b 1c 1d indoor fan speed high medium low output AUH air refresh buzzer compressor outdoor fan motor 4 way reversing valve and other assistant functions 3 2 Control functions 3 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 3 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 3 2 3 Sleep mode When the sleep
18. oor fan motor is running at medium or high level B The AUH function will be closed when meets any of the following conditions Ts Trzx2 C b Trc2A 2 c Indoor fan motor stops running or runs at low level d Entering defrost running e Receive signals for closing AUH from remote controller Note If AUH stops working because of condition b users can restart AUH only on condition that pipe temp lt D 1 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 at low level for 30 seconds when switching off The other things are the same to the condition when switching off normally 3 5 4 LCD display The LCD doesn t display symbols if air conditioner is in off status but in the checking and setting conditions the LCD will also display the corresponding state of the unit Turn on the master unit the LCD only display run indicator after 30 seconds The LCD will display all setting if remote control signal is received again and only display run indicator after receiving the last signal from remote controller 30 seconds later 3 5 5 Air refresh function not available for type A Press air refresh button when the unit is in off status the unit w
19. ration P2 Heating overload F1 The circuit of room temperature sensor is damaged or abnormal C The circuit of room temperature sensor is abnormal Pause light flashes and the unit stops D The circuit of pipe temperature sensor is abnormal Timer light flashes and the unit can not run in heating mode E When outdoor pipe temp sensor is failure Defrost entry conditions for the unit without outdoor pipe temp sensor 3 5 Other functions 3 5 1 Auto diagnosis The Auto diagnosis functions are in the following steps when the power is turned on Buzzer beeps 1s Running compressor 0 55 Running outdoor fan on 0 55 4 way reversing valve 0 55 AUH 0 55 low fan speed 0 55 medium fan speed on 12 Service Manual 0 55 high fan speed 0 55 step motor for louver 1a 1b 1c 1d on 0 5s no output for 0 55 output for 0 5s gt Buzzer beeps 15 During the period of auto diagnosis LED display screen is light all the time During the period of auto diagnosis buzzer will keep beeping if temperature sensor is abnormal except outdoor temperature sensor 3 5 2 Timer saving The master controller CPU runs as 61 times as the former speed there is no timer saving function within 1 minute 3 5 3 AUH A Starting conditions for AUH a Receive starting AUH signals from remote controller b In the heating mode c The build up time of compressor is more than 1 minute d Tr lt 18 C e Ts Tr23 C f Ind
20. rotecting point MODEL A B C D E F G H I J K L M N AA 2119 49 52 65 44 42 32 36 24 48 37 19 48 39 48 The type of remote controller for cooling only air conditioner is KK22B C1 14 Service Manual 4 Dimensional Data Indoor unit Outdoor unit The above figures are only schematic and they may be slightly different from the actual appliances you bought 15 Service Manual Exploded view for indoor unit 16 Service Manual Exploded view for outdoor uni 17 Service Manual 5 Performance Charts Cooling Indoor inlet temp DB C Operation current A Outdoor inlet temp DE e Points of rated operating conditions 18 Service Manual 6 Refrigerant Flow Diagram Outdoor unit Cooling Indoor unit H B aS Se nnn nnn 1 1 1 1 Compressor Service valve perc rJ Wide tube Heat exchanger Capillary tube Heat exchanger NN Thermal insulating of refrigerant pipeline 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 materia
21. tes The temperature of compressor is too high Refrigerant is not enough No Rotor may be blocked Measure the resistance of compressor coil Measure the resistance of power relay coil Measure if power supply voltage is too low 25 Service Manual 8 4 Air conditioner operates but abnormalities are observed 8 4 1 Poor cooling phenomena Poor cooling Is the temperature drones Bet properly Change the set temperature The cooling load is Reduce cool source or change the air too large conditioner with large power Refrigerant is not enough Filling it Refrigerant flow is not Capillary tube is blocked Replace it 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 w pee j The pause indicator is on i Replace the electric 1 tee protector is no use controller of indoor unit 26 Service Manual 8 4 2 Over cooling or heating Check the set temperature 8 5 Sensor is defective Check reference 3 4 8 9 Checking Electrical Components 9 1 Measure insulation resistance The insula
22. tion is in good condition if the resistance exceeds 2M92 _ Ground wire 9 1 1 Power supply wires Ss Insulation n Clamp the ground pins of the power plug with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires Fig 1 Then measure the resistance between the ground wire and the other power wire Fig 1 9 1 2 Indoor unit pL Clamp an aluminum plate fin or copper tube with the lead clip of TEX the insulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the check Copper E tube 9 1 3 Outdoor unit metalic part Clamp a metallic part of the unit with the lead clip of the Insulation tester Fig 3 insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are From fan motor compressor and connected on the terminal plate Fig 2 plain Note Metallic Probe n part Refer to electric wiring diagram EN Y Ji o If the probe can t enter the poles because the hole Insulation is too narrow then use a probe with a thinner pin tester Fig 4 27 Service Manual 9 1 4 Measurement of Insulation Resistance for Electrical Parts Disconnect the l
23. tting 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 9 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 Check the rated power of fuse Replace it with a proper one Yes No Check the resistance of indoor fan motor coil Replace indoor fan motor Yes Check the resistance of transformer coil No Replace transformer 22 Service Manual 8 2 2 The indoor and outdoor units do not work Check power supply 1 Power failure Yes 2 Check the breaker Check if something residue cover on transmitting part of the remote controller Check if infrared receiver on indoor unit is dirt Check fuse on indoor PCB Ass y Parts of indoor PCB Ass y or Check the resistance of indoor fan motor coil Measure the resistance of compressor coil switches are
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