CM2428E TEXT
Contents
1. 25 30 35 40 45 50 Outdoor inlet air D B temp C e Points of Rating condition Black dots in above charts indicate the following rating conditions Cooling Indoor air temperature 27 C D B 19 C W B Outdoor air temperature 35 C D B 24 C W B 6 INSTALLATION INSTRUCTIONS 6 1 Installation Site Selection Maximum Allowable Tubing Length L and INDOOR Tubing length L Elevation Difference H UNIT IMPORTANT Less than elevation difference H between OUTDOOR The Multi Split System outdoor unit should be installed as close to the 2 units UNIT the indoor units as possible Maximum allowable length of the refrigerant tubing and elevation difference between outdoor and indoor units are shown in Fig 1 and Table 1 Fig 1 Table 1 Max allowable Limit of Limit of elevation Required amount tubing length tubing length L difference H of additional at shipment m m refrigerant g m 7 5 20 7 25 If total tubing length becomes 7 5 to 20 m max charge additional refrigerant 407 by 25 g m x z 2 xhaust fan No additional charge of compressor is necessary Motair 7 AM Outdoor unit 6 2 Place and Space for Installation Avoid heat source exhaust fans etc Fig 2 Fig 2 direct sunlight damp humid or uneven locations Obstacle above Do NN NN e 32. choose a place as cool as possible Air intake Min 10 cm 42 2m Valve A choose a place that is well ventilated 2 E allow enough room around the unit for air intake Min gt X 8 Air discharge Min j 3 exhaust and possible maintenance Fig 3 10 50 cm 4 8 4 P 77777727272727477777777777 provide a solid base concrete block 10 x 40 cm beams or equal a minimum of 10 cm above ground level to Fig 3 reduce humidity and protect the unit against possible water damage and decreased service life Fig 4 Ground use lug anchor bolts or equal to bolt down the unit reducing vibration and noise Fig 4 Anchor bolts 4 pcs 6 3 Wiring instructions This appliance must be grounded Before starting installation of the multi split system disconnect the gray tripolar cable of 2 meter length Wiring System Diagram joined at the indoor units terminal base in positions o 220 240V L N and Ground mark Be sure to refer to the Wiring Disconnect o 50Hz System Diagram on the outdoor unit for proper switch A aa Ground installation of the multi split system Incorrect wiring Field supply ft can cause system damage or personal injury B E Unit General precautions on Wiring A 5 Qj Check the rated voltage on the unit s name plate before eL T r 1
3. 4 Remove the 4 bolts to remove the fan motor from the frame Fig 15 39 Hook Rear fan casing Fig 13 Centrifugal fan Hex wrench 8mm or 7 64 Fig 14 Bolts M6 Fan motor Fig 15 Frame argo climb s p a Via Varese 90 21013 Gallarate Va Italy Tel 39 0331 755111 Fax 39 0331 776240 www argoclima it Printed in italy
4. D wiring according to the wiring diagram 700 9 Provide a power outlet to be used exclusively for each 9 cn Ground unit with a power supply disconnect and a circuit Unit cal em breaker for overcurrent protection provided in the Ou o exclusive line Ai ae v noe Ground To prevent possible hazards due to insulation failure Indoor unit Outdoor unt the unit must be grounded Each wire must be connected firmly No wire should be allowed to touch refrigerant tubing the compressor or any moving parts of fan motors Regulations on wire diameters differ according to national and local requirements For field wiring regulations please refer to the LOCAL ELECTRICAL CODES before starting and carefully follow the regulations as you do the installation ANu Do not supply power to the system until all wiring and refrigerant tubing connections are completed and checked Wiring should only be done by an experienced qualified electrician Table 2 lists recommended wire lengths and diameters for power supply systems Refer to the Wiring System Diagram above for the meaning of A and B in Table 2 Table 2 A Power Supply Wiring Length m B Power Line Length m Cross Sectional Area 2 5mm 2 5mm 220 240 V 13 20 7 REFRIGERANT R407C SPECIAL PRECAUTIONS WHEN SERVICING UNIT 7 1 Characteristics of new refrigerant R407C 7 1 1 What is new refrigerant R407C R407C is a new r
5. Indoor Unit B 1 11 Ground D 9 1 3 Check power supply Check that voltage is in specified range 10 of the rating Check that power is being supplied 9 1 4 Check lead wires and connectors Check that coating of lead wires is not damaged Check that lead wires and connectors are firmly connected Check that wiring is correct 27 9 2 Air conditioner does not operate 9 2 1 Circuit breaker trips or fuse blows A When the circuit breaker is set to ON it is tripped soon Resetting is not possible There is a possibility of ground fault Check insulation resistance If resistance value is 2 or less insulation is defective Outdoor 9 Inter unit wiring Power Circuit x 1 supply breaker x 2 Sn an Indoor L v 1 unit A Ground aly 8 x meque 4x x 4 Ground Indoor unit B 11X x 1 2x 2 pepe X 4x X 4 Ground v Set circuit breaker to OFF D Remove both power supply wires and inter unit wires from terminal NO Insulation of plate in outdoor unit gt outdoor unit Measure insulation resistance is defective of outdoor unit Measure insulation resistance of electrical parts in outdoor unit e Remove inter unit wires from NO Insulation of terminal plate
6. a strong wood or metal frame to provide added support In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a Snowy Area for Heat Pump type Systems Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents When Connecting Refrigerant Tubing Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run When Servicing Turn the power off at the main power box mains before opening the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after you finish remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on
7. contact with fire or heat can produce dangerously toxic gas Confirm upon completing installation that no refrigerant gas is leaking If escaped gas comes in contact with a stove gas water heater electric room heater or other heat source it can produce dangerously toxic gas Table of Contents Page OPERATING RANGE SPECIFICATIONS Major Component Specifications Other Component Specifications 6 DIMENSIONAL DATA REFRIGERANT FLOW DIAGRAM ELECTRICAL DATA E E Electrical Characteristic Electric Wiring Diagrams Performance Charts 6 INSTALLATION INSTRUCTION 16 Charging additional refrigerant 7 8 Retro fitting existing systems 8 FUNCTION sss 9 TROUBLESHOOTING Check before and after troubleshooting Air Conditioner Does not work Some Parts of Air Conditioner does not operate Air Conditioner operates but abnormalities are observed ARRANGEMENT OF ELECTRICAL COMPONENTS CHECKING ELECTRICAL COMPONENTS NE Measure of insulation Resistance Checking Motor Capacitor DISASSEMBLY PROCEDURE FOR INDOOR UNIT 1 OPERATING RANGE Temperature Indoor Air Intake Temp Outdoor Air Intake Temp Maximum 32 C D B 23 43 C D B Cooling Minimum 19 D B 14 W B 19 D B 2 SPECIFICATIONS 2 1 Unit Specifications Indoor Unit AWR512CL X 2 Outdoor Unit AER524DC Voltage rating Performance Max Capacity BTU h Air circulation
8. control unit 172 5 18 5 a Unit mm Indoor Unit FCR512CL 680 SIF Ss 9 1 8 E 74 Center of tubing hole 74 075 4 places Wide tube 212 7 1 2 Narrow tube 26 35 1 4 Drain hose 226 41 190 Remote control unit 172 5 18 5 Unit mm 4 REFRIGERANT FLOW DIAGRAM Applicable Indoor Unit AWR512CL x2 FCR512CL x2 Outdoor Unit AER524DC Outdoor Unit Indoor Unit A I cct e u Wide tube K O D en S 212 7 mm B Accumulator 5 5 1 2 k 2 1 2 A E E 7 Q Wide tube 5 gt service E valve 3 Indoor Unit B 6 HM 1 w E Narrow w Narrow tube tube g D service E 26 35 mm valve Capillary 1 4 _ B tube Drier A Compressor A 5 ELECTRICAL DATA 5 1 Electrical Characteristics Outdoor Unit AER524DC The values in the table below indicate the sum of indoor and outdoor units which are in running condition 230 V Single
9. function prevents freezing of the indoor heat exchange coil When the compressor has been running for 10 minutes or more and the temperature of the indoor heat exchange coil falls below 1 C the control circuit stops the compressor for at least 6 minutes The compressor does not start again until the temperature rises above 8 C or 6 minutes has elapsed Thermo OFF Room temp Thermo ON T 1 C Set temp T C More than Indoor heat exch 6 minutes coil temp iso 1 C More than x 10 minutes r 1 Indoor fan Set speed Set speed 1 Functionally compressor running period or time are of two types 10 minutes and 6 minutes depending upon production date 26 9 TROUBLESHOOTING 9 1 Check before and after troubleshooting Hazardous voltage cause ELECTRIC SHOCK DEATH Disconnect power or turn off circuit breaker before you start checking or servicing 9 1 1 Check power supply wiring Check that power supply wires are correctly connected to terminals No 1 and No 2 on the 3p terminal plate in the outdoor unit 9 1 2 Check inter unit wiring Check that inter unit wiring is correctly connected to the indoor unit from the outdoor unit Outdoor Unit Power supply Power D Indoor Unit A 220 240V 50Hz supply Inter unit D Ground 777 1 wiring 8 or 6 Ground
10. in indoor unit gt indoor unit Measure insulation resistance is defective of indoor unit 28 Measure insulation resistance of electrical parts in indoor unit B Circuit breaker trips in several minutes after turning the air conditioner on There is a possibility of short circuit Check capacity of circuit breaker Replace with suitable one larger capacity Capacity of circuit breaker is suitable Measure resistance of outdoor fan motor winding Measure resistance of compressor motor winding 9 2 2 Neither indoor nor outdoor unit runs Power is not supplied Circuit breaker gt istripped Reset breaker Check power supply Power is being supplied to the outdoor unit Wait for recovery Power failure or contact power company 9 2 3 Only outdoor unit does not run Check power relay in outdoor unit Measure coil resistance of power relay RA RB 29 9 3 Some part of air conditioner does not operate 9 3 1 Only outdoor fan does not run lt Check fan casing Remove foreign matter or repair m gt Repair or replace Fan cannot id m matter lt Check fan rotation be turned Turn fan gently once or twice by hand Fan motor burnout gt or foreign matter in bearings Measure resist
11. need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service including failure to follow the instructions in this document Special Precautions When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and these instructions when wiring Improper connections and inadequate grounding can cause accidental injury or death Ground the unit following local electrical codes Connect all wiring tightly Loose wiring may cause overheating at connection points and a possible fire hazard When Transporting Be careful when picking up and moving the indoor and outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin aluminum fins on the air conditioner can cut your fingers When Installing In a Ceiling or Wall Make sure the ceiling wall is strong enough to hold the unit s weight It may be necessary to construct
12. phase 50Hz Number of indoor Uni Rating Conditions Running Amps A 12 50 Power Input kW Full Load Conditions RunningAmps A Power Input KW Rating Conditions Indoor Air Temperature 27 D B 19 C W B Outdoor Air Temperature 35 C D B 24 C W B Full Load Conditions Indoor Air Temperature 32 C 23 C W B Outdoor Air Temperature 43 C D B 5 2 Electric Wiring Diagram Outdoor Unit AER524DC TO INDOOR TO INDOOR UNIT B TERMINAL PLATE 4 2 TERMINAL m GRN YEL BRN P OVERLOAD OVERLOAD D RELAY 3 RELAY 1 BLU RED uH GRN YEL D OVERLOAD OVERLOAD D RELAY 4 RELAY 2 D S E lt O o rs LLI EL WHT A BLK YEL e YEL WHT e BLU BRN PNK GRY CAPACITOR C3 CAPACITOR C2 CAPACITOR C1 COMPRESSOR MOTOR B G COMPRESSOR MOTOR A G FAN MOTOR uH GRN YEL u GRN YEL uH GRN YEL G 12 Indoor Unit To avoid electrical shock hazard be sure to AWR512CL disconnect power before checking servicing and or cleaning any electrical parts FCR512CL THERMISTOR TRANSFORMER 1 213 415 6 718 9 112 5 4 5 6 7 8 9 5 3 Performance Charts Indoor Unit AWR512CL x1 FCR512 x1 Outdoor Unit AER524DC Cooling Characteristics Operating current A 25 30 35 40 45 50 Outdoor inlet air D B temp C Low pressure at wide tube service valve kg cm2G
13. 220 230 240V single phase 50 Hz Coil resistance Q at 23 C 21 1596 Contact rating AC 220V 25A Thermostat Fan Speed Control 23S YTB S383 Switching temp C high LOW 28 52 1 low gt HIGH 31 1 DATA SUBJECT TO CHANGE WITHOUT NOTICE 3 DIMENSIONAL DATA Outdoor Unit AER524DC F 1 20 UN J 20 F i E3 130 620 100 55 1 Narrow tube service valve 06 35 1 4 2 Wide tube service valve 212 7 1 2 3 Power supply wires connection 4 Inter unit wires connection 850 285 835 310 s 87 58 F Unit nm Indoor Unit AWR512CL 41 0 805 270 Drain hose 218 58 5 Center of tubing Narrow tube 26 35 1 4 hole 2 places Wide tube 212 7 1 2 177 Remote
14. 240V 50Hz Voltage rating 230 V Performance Cooling Max Capacity 6 70 BTU h 22900 Air circulation High m3 h 700 x 2 Moisture removal High Liters h 1 30 x 2 ees Electrical Rating Available voltage range Running amperes Power input Power factor C O P Compressor locked rotor amperes Cooling 198 264 12 5 2650 co w m 11 gt gt Controls Temperature control Control unit Timer Fan speeds Indoor Outdoor Airflow direction Indoor Horizontal Vertical Microprocessor thermostat Wireless remote control unit ON OFF 24 hours amp Daily program 1 hour OFF 3 and Auto Auto Hi Lo Manual Auto Washable Anti Mold Rotary Hermetic R407c 1030 x 2 Capillary tube 39 35 33 Air filter Compressor Refrigerant Amount charged at shipment Refrigerant control Operation sound Indoor Hi Me Lo Outdoor Hi Refrigerant tubing connections Flare type Max allowable tubing length at shipment 7 5 Refrigerant Narrow tube in 6 35 1 4 tube diameter Wide tube in 12 7 1 2 Refrigerant tube kit Air Clean Filter Optional Optional Dimensions amp Weight Indoor Unit Unit dimensions 680 835 900 850 190 305 CQ wu gt u Co Package dimensions Height 813 913 Width 1 011 1 000 Depth 296 400 Weight Net 23 5 67 5 Shipping 30 0 76 5 Shipping volume 0 24 0 365 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks Rating conditions are Cool
15. High m Moisture removal High Liters h Electrical Rating Available voltage range Running amperes Power input Power factor C O P Compressor locked rotor amperes Controls Temperature control Control unit Timer Fan speeds Indoor Outdoor Airflow direction Indoor Horizontal Vertical Air filter Compressor Refrigerant Amount charged at shipment Refrigerant control Operation sound Indoor Hi Me Lo dB A Outdoor Hi dB A Refrigerant tubing connections Max allowable tubing length at shipment Refrigerant Narrow tube mm in tube diameter Wide tube mm in Accessories Dimensions amp Weight Unit dimensions Package dimensions Height Width Depth Weight Net Shipping Shipping volume Remarks Rating conditions are Cooling Indoor air temperature 27 C D B 19 C W B Outdoor air temperature 35 C D B 24 C W B 230 V Cooling 6 70 22900 490 x 2 1 2x2 Cooling 198 264 12 5 2650 93 2 7 Microprocessor thermostat Wireless remote control unit ON OFF 24 hours amp Daily program 1 hour OFF 3 and Auto Auto Hi Lo Manual Auto Washable Anti Mold Rotary Hermetic R407c 1030 x 2 Capillary tube 39 35 33 53 Flare type 7 5 6 35 1 4 12 7 1 2 Air Clean Filter 270 835 177 305 243 913 855 1 000 332 400 8 0 67 5 10 0 76 5 0 07 0 365 DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit FCR512CL x 2 Outdoor Unit AER524DC Power Source 220
16. Open Refrigerant cylinder Fig 3 20 7 6 In case refrigerant is leaking Never attempt to charge additional refrigerant when refrigerant has been leaking CAUTION from the unit Follow the procedure described below to locate points of leaks and carry out repairs then recharge the refrigerant 1 Detecting Leaks Use the detector for R407C to locate refrigerant leak points 2 Recovering refrigerant 1 Detecting leaks Never release the gas to the atmosphere recover residual refrigerant using the refrigerant recovery unit for R407C instead 1 composition will have been altered 2 Recovering refrigerant 3 Welding leaking points OK Do not reuse the recovered refrigerant because its OK Confirm again that no residual refrigerant exists in the unit before starting welding Y Weld securely using flux and wax for R407C BEEN 3 Welding leaking points Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen N2 in the OK refrigerant circuit of the unit Leave ends of tubes open during welding OK Use nitrogen gas for the pressurized gas and never use a refrigerant other than R407C Also do not use oxygen or any flammable gas 5 Evacuation Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation OK of air due to a power interruption the valve will prevent the pump oi
17. TECHNICAL amp SERVICE MANUAL ZZ j Outdoor Unit Indoor Unit AER524DC AWR512CL FCR512CL MULTI SPLIT SYSTEM AIR CONDITIONER AWR512CL Ny 222 EX N N S ZX N WS SS S FCR512CL Floor Mounted Ceiling Mounted 0 8180 133 0 AER524DC 04 2001 Important Please Read Before Starting This air conditioning system meets strict safety and operating standards As the installer or service person itis an important part of your job to install or service the System so it operates safely and efficiently For safe installation and trouble free operation you must Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attention to all warning and caution notices given in this manual This symbol refers to a hazard or Nmum unsafe practice which can result in severe personal injury or death This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage If Necessary Get Help These instructions are all you
18. ance of outdoor fan motor winding Check fan motor capacitor 9 3 2 Only compressor does not run Check compressor motor Overload relay is working capacitor C2 C3 OLR 1 to 4 YES Measure resistance of Temperature of compressor is compressor motor winding abnormally high YES YES Refrigerant gas shortage Charge refrigerant gas 407 Rotor may be locked up 9 3 3 Function of outdoor fan speed control does not work properly Check thermostat in outdoor unit 23S 30 9 4 Air conditioner operates but abnormalities are observed 9 4 1 Poor cooling lt Check position of remote control unit YES Cool air from air conditioner gt reaches position directly Wide and narrow tubes between indoor unit and outdoor unit are gt insulated YES Temperature difference lt Measure temperature of suction is small Possibility of and discharge air of air conditioner gas shortage Temperature difference between suction and discharge air is large enough approx 10 deg or more Check for clogging of air filter gt Air filter is clogged YES Fan speed is set to LOW gt Review cooling load estimate if performance of air conditioner is gt normal 9 4 2 Excessive cooling NO Set temperature is suitable gt Remote control unit is placed where it can detect room gt tem
19. conventional models are required 7 2 Checklist before servicing Tubing precautions Refrigerant R407C is more easily affected by dust or moisture compared with R22 thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation No addition of compressor oil for RA07C No additional charge of compressor oil is permitted No use of refrigerant other than R407C Never use a refrigerant other than R407C 9 If refrigerant R407C is exposed to fire Through welding etc toxic gas may be released when R407C refrigerant is exposed to fire Therefore be sure to provide ample ventilation during installation work Caution in case of R407C leak Check for possible leak points with the special leak detector for R407C If a leak occurs inside the room immediately provide thorough ventilation 7 3 Tools specifically for RA07C For servicing use the following tools for R407C Tool Distinction Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Tools specifically for R407C Refrigerant recovery unit e Vacuum pump with anti reverse flow 1 Solenoid valve installed type which prevents oil from flowing back into the unit when the power is off is recommended e Vacuum pump 2 can be used if the following adapter is attached e Vacuum pump adapter reverse flow prevention adapter 3 Solenoid valve installed adapter attached to a conventi
20. cuit switches the compressor OFF after 5 minutes or more of compressor operation Thermo When the room temperature is above T 1 C T C is set temperature Compressor gt Thermo OFF When the room temperature is equal to or below set temperature T C Compressor gt OFF 24 8 2 Dry Operation Dehumidification Dry operation uses the ability of the cooling cycle to remove moisture from the air but by running at low level to dehumidify without greatly reducing the room temperature The air conditioner repeats the cycle of turning ON and OFF automatically as shown in the chart below according to the room temperature Room temp Cooling operation T 2 C Dry A zone Compressor Continuous operation indoor fan L low speed LL very low speed intermittent ventilation Set temp T C only while the compressor is ON T 1 C Dry B zone Compressor Intermittent operation ON for 3 minutes and OFF for 9 minutes FMI indoor fan L low speed LL very low speed intermittent ventilation only while the compressor is ON Room temp 15 C Monitor zone Both the indoor and outdoor units stop Intermittent ventilation occurs by switching the indoor fan speed between L lt gt LL Dry operation does not occur when the room temperature is under 15 C which is the monitor zone When the compressor stops the indoor fan stops as well 25 8 3 Freeze Prevention This
21. e valve Charge the liquid refrigerant e When charged with a refrigerant cylinder use the with the cylinder in the Fig 1 up side down position electronic scale for charging refrigerant In this case if the volume of refrigerant in the cylinder becomes less than 20 of the fully charged amount the composition of the refrigerant starts to change Thus do not use Valve the refrigerant if the amount in the refrigerant cylinder is less than 20 Also charge the minimum necessary amount to the cylinder before using it for charging the air conditioning unit Example In case of charging refrigerant to a unit requiring 0 76Kg using a capacity of 10Kg cylinder the minimum necessary amount for the cylinder is 0 76 10x 0 20 2 76Kg Single valve with siphon tube For the remaining refrigerant refer to the Charge with the cylinder in the instructions of the refrigerant manufacturer normal position Configurations and characteristics of cylinders Fig 2 If using a charging cylinder transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder Prepare an evacuated charging cylinder beforehand To prevent the composition of R407C from changing Charging never bleed the refrigerant cylinder gas into the atmosphere while transferring the refrigerant Fig 3 Do not use the refrigerant if the amount in the charging cylinder is less than 20 NY
22. efrigerant that contains three types of non azeotropy type mixed refrigerant which does not adversely affect the Earth s ozone layer Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant R22 7 1 2 Components mixing proportions HFC32 2396 HFC125 25 HFC134a 52 7 1 3 Characteristics 6 Less toxic more chemically stable refrigerant Composition of refrigerant R407C changes whether it is in gaseous phase or liquid phase Thus when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant Therefore do not add new refrigerant Instead recover the remaining refrigerant with the refrigerant recovery unit Then after evacuation totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state liquid phase When refrigerant 407 is used the composition will differ depending on whether it is in gaseous or liquid phase and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state Thus always charge the refrigerant while it is in the liquid phase 6 Ether type oil is used for the compressor oil for R407C type units which is N CAUTION different from the mineral oil used for R22 Thus more attention to moisture prevention and faster replacement work compared with
23. er latch 3 Do the same procedure for the left metal clip Fig 1 4 Unlatch the 2 tabs on the lower part of the grille to take it off completely Unit Air intake grille Metal clip Fig 2 35 12 2 Removing Side Panels 1 Remove the 3 screws attaching the left side panel Fig 3 2 Note the position of the hook on the inside of the left side panel To disengage the hook from the slot slide down the panel for removal Fig 3 3 Do the same procedure for the right side panel 12 3 Access and Removal of Electrical Component Box NES Hazardous voltage can cause ELECTRIC SHOCK or DEATH Disconnect the power or turn off circuit breaker before you start checking or servicing 1 Remove the front screw with a screwdriver Fig 4 2 Slide the lid out and up Fig 4 3 Disconnect the wiring as necessary 4 4 Remove the 4 screws then pull out the electrical component box Fig 5 36 Hook Hook Tapping screws 4 x 10 mm Fig 3 Fig 4 Connectors Fig 5 12 4 Removing Flap Motor 1 Remove the 3 screws used to mount the top panel Fig 6 2 While unlatching the 2 tabs inside the back of the top panel lift the top panel diagonally in the direction of the arrow Fig 6 3 Remove the 2 screws to pull off the flap motor The arm and cam come off together with the motor Fig 7 Bios motor Fig 6 12 5 Removing Evap
24. impurities 2 Replacing compressor 2 Replacing compressor Soon after removing pinched pipes of both discharge and suction tubes of the new compressor replace it quickly OK 3 Checking for sealing s 3 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R407C Also do not use OK oxygen or any flammable gas 4 Evacuation Y Use a solenoid valve installed vacuum pump so 4 Evacuation that even if power is cut off in the middle of evacuation OK of air due to a power interruption the valve will prevent the pump oil from flowing back The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly 5 Recharging When using a vacuum pump with exhaust air volume more than 25L min and ultimate vacuum pressure rate of 0 05Torr Standard time of evacuation Length of tubing Less than 10 m More than 10 m More than 10 min More than 15 min 5 Recharging lt Valve Be sure to charge the specified amount of refrigerant in liquid state using the service port of wide tube service valve The proper amount is listed on the unit s nameplate When the entire amount cannot be charged all at once charge gradually while operating the unit in Cooling Operation Never charge a large amount CAUTION of liquid refrigerant at once to the unit This may cause damage to the compressor Singl
25. ing Indoor air temperature 27 D B 19 W B Outdoor air temperature 35 D B 24 W B 2 2 Major Component Specifications Outdoor Unit AER524DC Compressor Run capacitor 6 WHT BRN 99 5 WHT YEL 252 YEL PNK 63 2 n I IS X i H Face area External Finish Acrylic baked on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit AWR512CL POW KGE A POW KSE B Control circuit fuse 250 V 3 15 A Remote Control Unit RCS 8PS3E Type _ Da and longi mm Fan molor mode Qy No of poles pm 230 V High Nominal output Coil resistance Ambient temp 20 VLT WHT YEL ORG Safety devices Type Operating temp Open Run capacitor Flap Motor 2 DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit FCR512CL POWKISSGSN Control circuit fuse 250 Remote Control Unit RCS 5PS3E Type Cross flow Qty Dia and length mm Fan motor model Qy No of poles _ rpm 230 V High Nominal output Coil resistance Ambient temp 20 C GRY WHT 3114796 WHT VLT 97 6 7 VLT YEL 97 6 7 WHT PNK 4252796 Safety devices Type Internal protector Operating temp Open 14545 Automatic reclosing Run capacitor uE VAC Coil resistance Ambient temp 20 C kQ DATA SUBJECT TO CHANGE WITHOUT NOTICE 2 3 Other Component Specifications Power Relay RA RB G7L 2A TUB Coil rating
26. 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 11 1 2 Outdoor Unit Clamp a metallic part of the unit with the lead clip of the 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 11 1 3 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 Figs 3 and 4 Refer to Electric Wiring Diagram If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin CHECKING ELECTRICAL COMPONENTS Ground wire Probe Insulation tester Fig 1 Terminal plate gt P us Clip Copper tube or metallic part Fig 2 Cli p x Z Copper tube or metallic part Insulation tester Fig 3 From fan motor compressor and other parts Metallic part Clip Insulation tester Fig 4 33 11 2 Checking Motor Capacitor Remove the lead wires from the capacitor terminals and then place a probe on the capacitor terminals as shown in Fig 5 Observe the deflection of the pointer setting the resis
27. l from flowing back The equipment may be damaged if moisture remains 6 Recharging in the tubing thus carry out the evacuation thoroughly When using a vacuum pump with exhaust air volume more than 25L min and ultimate vacuum pressure rate of 0 05Torr Standard time of evacuation Length of tubing Less than 10 m More than 10 m More than 10 min More than 15 min 21 6 Recharging Valve Be sure to charge the specified amount of refrigerant in liquid state using the service port of wide tube service valve The proper amount is listed on the unit s nameplate When the entire amount cannot be charged all at once charge gradually while operating the unit in Cooling Operation Never charge a large amount CAUTION of liquid refrigerant at once to the unit This may cause damage to the compressor Single valve Charge the liquid refrigerant When charged with a refrigerant cylinder use the with the cylinder in the Fig 4 electronic scale for charging refrigerant In this case if the volume of refrigerant in the cylinder becomes less than 20 of the fully charged amount the composition of the refrigerant starts to change Thus do not use the refrigerant if the amount in the refrigerant cylinder is less than 20 Valve Also charge the minimum necessary amount to the cylinder before using it for charging the air conditioning unit Example In case of charging refrigerant to a unit
28. onal vacuum pump Electronic scale for charging refrigerant Flare tool Bender Tools which can be commonly Torque wrench used for R22 and R407C Cutter Reamer Welding machine nitrogen gas cylinder The above tools specifically for 407 must not be used for R22 Doing so will N CAUTION cause malfunction of the unit For the above vacuum pump 4 1 2 and vacuum pump adapter 3 those for R22 type units can be used for R407C type However they must be used exclusively for 407 and never alternately with R22 7 4 For tubing installation procedures When the tubes are connected always apply HAB oil on the flare portions to improve the sealing of tubing The following is the HAB oil generally used Esso ZERICE 532 NOTE For details on tubing installation procedures refer to the installation manuals atiached to the indoor unit and outdoor unit 7 5 In case of compressor malfunction Should the compressor malfunction be sure to replace compressor as quickly as CAUTION possible Use only the tools indicated exclusively for RA07C See 7 3 Tools specifically for R407C 10 5 1 Procedure for replacing compressor 1 Recovering refrigerant Any remaining refrigerant inside the unit should not be released to the atmosphere but recovered using the refrigerant recovery unit for RA07C OK 1 Recovering refrigerant Do not reuse the recovered refrigerant since will contain
29. orator Fig 7 zIndoor Heat Exchange Coil 1 Remove the 7 screws used to mount the blades Fig 8 Blades DD 2 Lift the blades in the direction of the arrow Fig 8 ZZ Fig 8 37 3 Remove the 6 screws of the front panel and pull it toward you Fig 9 4 Remove the 2 screws used to mount the evaporator Fig 10 5 Remove the rubber cap to pull the thermistor out of the evaporator Fig 10 6 Cut the plastic clamp securing the drain hose to the front fan casing Fig 10 7 The evaporator is built into the drain pan Pull out the drain pan together with the evaporator in the direction of the arrow Fig 10 IMPORTANT The foamed polystyrene drain pan is fragile DO NOT apply excessive force when removing it 8 The evaporator can be removed by sliding it out from the drain pan in the direction of the arrow Fig 11 Front panel Fig 9 Rubber cap Thermistor Drain pan Front fan casing Drain hose Plastic clamp Fig 10 Mounting plate Mounting Evaporator Indoor coil Drain pan Fig 11 38 12 6 Removing Fan and Fan Motor 1 Unlatch the 2 hooks on each side to take off the front fan casing Fig 12 2 Remove the 2 screws attaching the rear fan casing and then pull the fan casing out 8 Insert a hex wrench in the fan boss and turn it counterclockwise to loosen the centrifugal fan The fan can be removed by sliding it to the left Fig 14
30. perature properly 31 Change position of remote control unit Insulate both wide and narrow tubes separately and then tape together Charge refrigerant gas R407c Clean filter Set fan speed to either HIGH or MEDIUM Reduce cooling load or replace the air conditioner with larger capacity Set temperature to higher value using temperature setting buttons of the remote control unit Change position of remote control unit 10 ARRANGEMENT OF ELECTRICAL COMPONENT Outdoor Unit AER524DC 6 Electric Parts Compressor moter capacitor C3 Compressor moter capacitor C2 Relay RB Terminal plate 4P Relay RA To indoor unit B li 9999 9 5 1234 re 2 82 Tol Siig 1234 Fan moter capacitor C1 Terminal plate 4P To indoor unit A Overload relay 1 Overload relay 3 Terminal plate 3P From power supply 6 Parts Layout in Unit Heat exchenger coil Compressor A CMA 4 Compressor B CMB Fan motor 32 11 11 1 Measurement of Insulation Resistance The insulation is in good condition if the resistance exceeds 2MQ 11 1 1 Power Supply Wires Clamp the ground wire of the power supply wires with the lead clip of the
31. rant R407C for existing units which use R22 This will cause the air conditioner to operate improperly and may result in a hazardous condition 7 8 2 Use of existing tubing If replacing an older unit that used refrigerant R22 with a R407C unit do not use its existing tubing Instead completely new tubing must be used 23 8 FUNCTION 8 1 Room Temperature Control Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature sensor in the remote control unit The room temperature and other information is transmitted every 3 minutes by the remote control unit to the controller in the indoor unit Signal from remote control unit 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes Thermo Thermo Thermo Thermo Thermo Thermo OFF ON OFF ON ON ON En ANN More than 5 minutes Thermo OFF T 1 C settemp T C 5 minutes 3 minutes Room temp Set speed Compressor 2 T o Z Outdoor fan Indoor fan The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 3 minutes To protect the compressor from stalling out when trying to start against the high side refrigerant pressure the control circuit has a built in automatic time delay to allow the internal pressure to equalize As a protective measure the control cir
32. requiring 0 76Kg using a capacity of 10Kg cylinder the minimum necessary amount for the cylinder is 0 76 10 x 0 20 2 76Kg Single valve with siphon tube For the remaining refrigerant refer to the instructions Charge with the cylinder in the Fig 5 of the refrigerant manufacturer normal position R Configurations and characteristics of cylinders lt If using a charging cylinder transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder Prepare an evacuated charging cylinder beforehand To prevent the composition Charci of R407C from changing 1 never bleed the refrigerant gas into the atmosphere while transferring the refrigerant Fig 6 Do not use the refrigerant if the amount in the charging cylinder is less than 20 ging cy Open Refrigerant cylinder Fig 6 22 7 7 Charging additional refrigerant 7 7 1 When tubes are extended Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit Charge additional refrigerant in liquid state Never charge additional refrigerant if refrigerant is leaking from the unit Follow N CAUTION instructions given in 10 6 In case refrigerant is leaking and completely carry out repairs Only then should you recharge the refrigerant 7 8 Retro fitting existing systems 7 8 1 Use of existing units Never use new refrige
33. tance 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 to the capacity of the capacitor 34 LR Compressor motor capacitor Multimeter Fan motor capacitor Fig 5 12 DISASSEMBLY PROCEDURE FOR INDOOR UNIT N IMPORTANT Please Read Before Starting Safety precautions for servicing the CEILING MOUNTED indoor unit Before attempting to replace heavy and bulky parts such as the evaporator and fan motor disconnect the indoor unit from the system and place it on the floor Refer to the steps given below When checking or servicing the air intake grille side panels or electrical component box first check that power is completely disconnected Pay utmost care that your working platform is stable enough Also do not drop any replaced parts and tools on the floor For Floor Installation 12 1 Removing Air Intake Grille 1 Hold both ends and pull forward to open the air intake grille Fig 1 2 Remove the metal clips connecting the unit and the grille First with a screwdriver loosen the marked screw a little at the right side clip DO NOT loosen it too much otherwise the screw and small metal parts will fall off inside then press on the stopper and pull off Fig 2 Cent
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