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Mitsubishi Heavy Industries Air Conditioners Technical Manual

1. 20 4 10 Economical operatlon 20 TLLA blowing ODOration 20 42 CLEAN operation Control u um t eo eoi 21 BA EN COMO 21 S INSTALLA TON eene E E N 22 5 1 Selection of installation location 24 5 2 Installation Of 069 10706 eque asa 25 5 3 Installation of outdoor 28 2344 Pipe COBCOLIOTL i en i 25 5 5 Precautions for wireless remote controller operation 30 340 Standard FLDS ANA tessei setae heerten a id oe eed 31 6 MAINTENANCE u 32 6 1 Electrical parts failure diagnosis method 32 OZ OU 56 TOE RV ICTING MANUAL tie uu Meene enten 5 S MOUNT ASSEMBLY ecard ebd ons o D ING OOK WG 72 5 2 Outdoor Uni scd ee Ass 80 1 GENERAL INFORMATION 1 1 Features 1 Inverter e Heating cooling The rotate speed of the compressor is changed steplessly in relation to varying load and is linked with the fans of indoor and outdoor units controlled by the changes of frequency thus controls the power e Allowing quick heating cooling operation
2. 80 8 1 2 SRK35QA S 3 4 1 1 1 1 1 1 7 1 1 1 m i 82 HEAT EXCH amp CONTROL RAC SRK35QA S PANEL amp FAN ASSY 83 NO 1 5 1 2 3 4 5 7 10 11 12 13 21 13 14 15 16 17 18 19 Part No RYD102A024AH RYD435A050C RYD437A015 RYD129A046A W010D04X008 RYD122A017R RYG923C001 RYD431G001 RYD511A015 RYD129A039 RYD132A005 RYD111A010 RYDO32A006A RYD435A023H RYD423A005 RYD435A023H RYD129A043 RYD512T002H RYD935C001 RYD436A018J RYD436A019J Parts PANEL ASSY FRONT GRILLE AIR INLET A NET CAP TAP SCREW CRS TRS 2 PANEL FRONT BEARING PLANE IMPELLER MOTOR AC COVER MOTOR LID BASE ASSY PLATE INSTALLATION GRILLE ASSY AIR OUT HOSE DRAIN GRILLE ASSY AIR OUT BRACKET MOTOR A MOTOR STEPPING COLLAR FLAP A FLAP B 84 RE Q 20 21 RYD436A021 LOUVER ASSY RYD436A020 LOUVER RYD129A048 PLATE CONNECTING PANEL amp FAN ASSY 85 8 2 Outdoor unit 8 2 1 SRC25QA S SRC25QA S HEAT EXCH amp CONTROL onr EO MO T 86 17 23 RYF200A057 FINAL ASSY COMP ERI NCC RN NEN RYF142A017 BOX ASSY CONTROL a eme jemen 88 4833 FB 1 Al PRI AT
3. P G oh Oe GON TROL e Or EX ES ES Jd 89 SRC25QA S PANEL amp FAN ASSY E Q 1 1 1 1 1 1 1 12 5 2 1 1 1 1 1 PANEL amp FAN ASSY 01 cO 8 2 2 SRC35QA S a lt s NN EN EN NN EE MN N RYF381A070 VALVE SERVICE 1 4 10 RYF381A069 VALVE SERVICE 3 8 RYF154D009B INSULATION COMP 12 RYF154D013 INSULATION COMP 13 RYF154D037 INSULATION COMP 14 RYF154D011A INSULATION COMP 15 RYF382F013 COIL SOLENOID 16 SSA382F210AY COIL SOLENOID 17 23 RYF200A057 FINAL ASSY COMP RYF932C019 RUBBER WASHER RYF142A010 BOX CONTROL A RYF116A014 BRACKET TB 42 RYFO11F037F LABEL MODEL NAME 43 RYF011H029F ENERGY LABEL 44 008 002 PARTS STANDARD m mmm 1 94 9 amp 5 FJ 2 M REET HEAT EXCH CONTROL SRC35QA S PANEL amp FAN ASSY Kx 19 RYF937A002A CLAMP WIRE PANEL amp FAN ASSY cO VARIABLE FREQUENCY WALL MOUNTED TYPE ROOM AIR CONDITIONERS MITSUBISHI HEAVY INDUSTRIES EUROPE LTD AIR CONDITIONING DIVISION 4th Floor International Buildings 71 Kingsway London WC2B 6ST U K Phone 44 0 20 7421
4. Serial signal transmission error Flash 1 time Flash 7 Rotor lock times Below 16 rps Flash 2 times Above 16 rps Flash 3 times w Poor phase position switching U phase Poor phase position switching V phase Poor phase position switching W phase or not determined Start of compressor program within 4 sec after phase position switching Error of fan motor of indoor unit E Flash 5 times Flash 6 times Protection control operation Flash 8 times Vent pipe sensor error abnormal stop Indoor heat exchanger sensor error abnormal stop Flash 3 times Heat exchanger liquid pipe sensor error abnormal stop Flash 4 times Condensation prevention control Defrost control High pressure control Flash 7 times Compressor over heat protection control bil M M Bd M M ii i oo oo oo Excessive refrigerant Compressor lock Operation with overload Excessive refrigerant Compressor lock Operation with overload Excessive refrigerant Compressor lock Operation with overload Excessive refrigerant Compressor lock Operation with overload Excessive refrigerant Compressor lock Operation with overload Excessive refrigerant Compressor lock Operation with overload Insufficient refrigerant Defective vent pipe sensor Disconnecting valve closed Defective power supply Power wir
5. HI POWER ECONOMY button This button changes the HI PO WER ECONOMY mode TEMPERATURE button 7 ess again for stopping AIR FLOW button This button sets room tem perature press the button to select the current time and timing time This button sets the swaying wav of the air flan OFF TIMER button N C ON TIMER button This button sets the ON timer Times This button sets the OFF timer Times C SLEEP button RESET switch This button changes the SLEEP mode Switch for resetting microcomputer CLEAN button ID CAN CEL button S A eThe above illustration shows all M This button changes the CLEAN mode controls but in practice only the The button is used to cancel the timing relevant parts are shown ONtimer OFF timer and SLEEP operation Indication section N CLEAN indicator OFF TIMER indicator T ON OFF luminous button Indicates during ON OFF TIMER mode operation ws SLEEP indicator Operation mode indicator Indicates duning SLEEP pinde Indicates selected operation with lamp m is used to indicate the mode selected AUTO 3 COOLING 2 HEATING DRYING Time display lamp TEMPERATURE indicator _ Indicates set temperature Does not indicate temperature when operation mode is on AUTO Display the current time or the time _ VAN SPEED indicator Air supply display la
6. Mitsubishi Heavy Industries Conditioners Technical Manual Manual Number 2011 No W1 01 Variable Frequency Wall Mounted Type Room Air Conditioners Split system heat pump type SRK25QA S SRC25QA S SRK35QA S SRC35QA S R410A Refrigerant Used MITSUBISHI HEAVY INDUSTRIES LTD Table of Contents 1 GENERAL INFORMATION ensem enn 1 CALMS 1 1 2 Model ode I 2 2 2 4 I MOdel TUB OTI sm uuu n 2 2 2 ISON CC YOU ed 4 4 2 4 Cooling cycle system diagram 5 6 3 ELECTRICAL WIRING DIAGRAM y 4 NAME OF EACH PART AND ITS FUNCTION 9 J L NAME OE BACH PARE thee 9 4 2 Emergency ON OFF button back up switch 12 4 3 Automate Testa ie M ren eei hice 12 AA Flap 12 ea s dores INE li aded mb enit heeten 14 4 6 Outline of heating operation LD T uu venen en 15 4 7 Outline of cooling operation 17 4 8 Outline of drying operation 18 4 9 Outline of automatic operation
7. Page 11 Drains water from the dehumidified air pu cif Kum Uh 0 Refrigerant piping connection electric flex Outdoor unit Accessories on side amp rear suface Battery A Wireless remote controller 9 RUN lamp green ON during running and mould proof running Indication section of air conditioner HI POWER lamp green ON during Hi Power running TIMER ON during ECONO running ON during timing operation Opening the air inlet grille Put your hands on the indentations on both sides raise the grille towards yourself and stop at the opening position of about 60 Closing the air inlet grille Gently push both sides and then gently push the central portion Unit ON OFF button Removing and mounting the air inlet grille To remove the air inlet grille to clean the inside To mount the air inlet grille insert the mounting open it at the position of about 65 and pull it arm in the pin roll on the main frame and close the towards yourself to remove the grille grille 10 Operation and indication section for remote control Operation section FAN SPEED button Each time the button is pushed indicator is switched over in turn N OPERATION MODE select button Each time the button is pushed m indicator is switched over in turn v ON OFF button Press for starting operation pr
8. 5 2 Installation of indoor unit Mountng of mounting plate Setting the relationship between Fixing the mounting plate plate and indoor unit Installation space Firstly find the position o In the loose state use support or columella in the wall four screws to adjust Check that the mounting location the mounting plate is level and then fix the unit horizontally more securely Indoor unit Front view Service Indoor unit Space or sg Service space Mounting plate 2 3 ZAN nd w 7 hole En N amp Plane mating mark Turn the mounting plate with the standard hole as the center to make it level Pipe 65 Fixing on the concrete wall Using nut retainer Using screw retainer Nut M6 Nut 6 x 12 Mounting plate Mounting plate Max 26 Installation of indoor unit Drilling holes and securing sleeve optional Drilling a hole with 65 whole core drill Adjusting the length of the sleeve Indoor Outdoor q 5 65 o If the rear pipe is pulled out cut the Use the whole core drill to drill a hole lower part and right side of the axle collar Mounting the sleeve Sleeve Declined plate Sealing ring Om Nus ti Putty Indoor Outdoor Insert the sleeve Sketch of state after mounting Declined Tlange Sleeve Sealing ring N Caution
9. Drill a hole at an angle of 5 NG Preparation for installation of indoor unit Connection board Preparation for mounting of electric wire Open the air inlet grille 2 Remove the cover Remove the wire clamp 4 Connect the electric wire to the connection board securely 1 Connect the electric wire to the connection board securely If the electric wire is not fixed Inlayed piece of the base completely the contacting will be poor thus Some space shall be left to causes risk as the connection board may heat unload screw after installation which causes fire 2 Please note that the number of terminals of the indoor and outdoor connections should not be Use cables for interconnection wiring to avoid loosening confused ofthe wires I CENELEC code for cables required field cables 3 Use the wire clamp to connect the electric wire HOSRNR4AGL5 Example or 245 1 57 Connect the electric wire through the wire clamp H Harmoized cable type O Secure the cover 05 300 500 volts Close the air inlet grille Natural and or synth rubber wire insulation N polychlorene rubber conductors insulation R stranded core 4or5 Number of conductors G One conductor the cable is the earth conductor yellow green 1 5 Section of copper wire mm2 In case of failure of wiring connection the indoor unit will stop running the RUN lamp will light up and the TIMER lamp will flash 27 The pipe ca
10. 7 1 Overview 7 1 1 R410A Refrigerant 1 Using R410A in air conditioners In 1974 scientists found that the ozone in the upper stratosphere about 20 40 km away from the ground may be damaged by ozone depleting substances such as CFC chlorofluorocarbon and HCFC hydrochlorofluorocarbon etc From then on many countries have taken various measures to protect the ozone layer As a kind of HCFC the conventional refrigerant R22 used in air conditioners will damage the ozone layer Therefore in accordance with the international protocols 1 9 Protocols of Montreal Ozone Depleting Substances and the relevant laws and regulations of the various countries other refrigerants that will not damage the ozone layer must be used to substitute R22 Refrigerants composed of hydrogen H fluorine F and carbon C are called HFC which will not damage the ozone layer R410A is a kind of HFC with a pressure higher than R22 by about 1 6 times and a performance about the same as R22 at the same temperature of refrigerant 2 Chemical properties of RA10A a Chemical stability Like R22 R410A is a harmfulless inflammable refrigerant with stable chemical properties However just like R22 with a specific gravity of vapor heavier than that of air if R410A is leaked to a closed room it will be distributed at a low level and cause oxygen starvation If R410A is directly exposed to fire it may produce poisonous gas so be sure to dispose of it in a place w
11. Cooling operation Air flow Me and Set temperature 21 C Use the remote controller to send signals within one minute after inserting the cable into the supply Count the flashing and going off of the RUN lamp and TIMER lamp and confirm the content of failure in the list see Page 40 41 Restart the appliance more than one 7 a S minute after the power is switched off Is there any other data p gt and the maintenance mode is ended indication 2 Yes Make changes according to the remote controller setting list see Page 41 37 3 Counting of flashing in service mode 1 5 sec light up beginning signal and number of continuous flashes Number of continuous flashes excluding the 1 5 sec light up beginning signal e Safe current heating safety I for example the stop code is 32 RUN lamp tens place flashes 3 times and TIMER lamp ones place flashes 2 times 10 2x 1 32 The code 32 Safe current heating safety I can be read from the list 1 5 sec RUN lamp ON tens place OFF TIMER lamp PN ones place 4 In the service mode set the remote controller operation switching air flow setting temperature setting according to the table below When sending signals to the main frame of the air conditioner the service data indication will change Self diagnosis data What is self diagnosis data Refe
12. Do not turn p M o Connect the pipes on both liquid and gas sides o Connect the pipes on both liquid and gas sides o Tighten the nuts to the following torque o All torques are the same as on the indoor liquid side Liquid side 6 35 14 0 18 ON 1 4 1 8kgf m Gas side 9 52 34 0 42 ON m 3 4 4 2kgf m Air purging DSecure all flare nuts on both indoor and outdoor sides to prevent leaks from the pipes 2 Connect the operation valves charge hose manifold valve and vacuum pump as shown in the right figure 3Fully open Handle Lo for the manifold valve and pump a vacuum for over 15 minutes Ensure that the meter is Compound pressure gauge Pressure gauge FED Operation valve Gauge manifold f 2 way valve 76 Designed specifically for R410A 0 1MPa Operation valve _ Handle Hi 3 way valve Handle p Charge hose Designed specifically for RA10A lt Service port gt f indicating 76cmHg 0 1 MPa 4 After vacuuming fully open the operation valve bothonarsenose Vin np dr flow type liquid and gas sides with a hexagon wrench Designed specifically for 5 Ensure that there are no gas leaks from the joints in the 4 0 indoor and outdoor units e Since the system uses service ports differing in diameter from those found on the conventional models a charge hose for R22 presently in use is not applicable
13. lt outdoor circuit board signal over 10 sec with power even over min and 50 sec operating no signal compressor stops The operation stops and the wire break of the heat exchanger sensor is detected wire break is determined when it is detected within 15 sec at a temperature of below 20 C No indication during operation The operation stops and the wire break of the heat exchanger sensor is detected wire break is determined when it is detected within 15 sec at a temperature of below 20 C No indication during operation Flash 5 Light up Voltage error Voltage is abnormal times Flash 6 Light up Indoor fan motor error times Defective fan motor poor plug contacting defective indoor circuit board When the air conditioner is operating and the indoor fan motor is ON the rotational frequency of the indoor fan motor is 300 rpm for over 30sec The air conditioner stops Light up Flash 3 Over current safe Operating with overload over times current current Light up Flash 4 Power transistor failure Failure of power transistor nn times Light up Flash 5 Compressor over heat times Continuous Flash 2 Outdoor heat flashing times exchanger liquid pipe sensor error Continuous Flash 1 Outdoor air temp flashing time sensor error Continuous Flash 4 Vent pipe sensor error flashing times Light up Flash 1 Power cut time Light up Flash 2 Outdoor unit error times Flash 2 Flash 2 Rotor lock times t
14. transistor high voltage side N Defective circuit board of outdoor unit Failure of power transistor is determined times loop failure Damage of mains transformer when the compressor starts Flash 1 Failure of Abnormal Wiring break of compressor The result of PWM algorithm 0 lasts time outdoor result of PWM Damage of mains transformer for over 3 min unit algorithm 22 Input below Wiring break of compressor The result of PWM algorithm is 90 and 2A PWM Defective outdoor circuit board the input current is below the setting for 3 above 90 min continuously 3 abnormal Disconnecting valve closed Automatic restoration and abnormal stop stops within 20 Output missing phase of compressor repeat 3 times within 20 min after the min Defective EEV outdoor unit is powered on Insufficient refrigerant times voltage times Defective outdoor circuit board 21 23 28 29 Flash 7 27 Error of Error of Defective outdoor fan motor 75 rpm lasts for over 30 sec times outdoor outdoor fan Poor plug contacting fan motor motor for DC Defective outdoor circuit board thrice motor only Flash 3 Flash 1 31 Safe Cooling safe Excessive refrigerant Safe current stops in the safe current I times time current current I mode during cooling operation Flash 2 32 Heating safe Excessive refrigerant Safe current stops in the safe current I times current I mode during heating operation as 33 Cooling safe Excessive refrigerant Safe
15. which repeats for 300 sec is shown below Flash about 3 sec On about 5 sec The flashing stops for one minute and then repeats for 300 sec c Judge according to the flashing and ON status of the LEDs LEDs time LEDs flash or light up d Let it operate for a while and the error will be indicated the indoor RUN lamp flashes 2 times and the TIMER lamp flashes 2 times The output of the inverter stops Note The terminals of the power transistor that control the circuit board are mounted on the back of the control casing Remove the control circuit board before connection JU Zy Insert them into the Xy terminals of the power 57 14 Check method for EEV After the power is switched on check the opening of the EEV and the sound and voltage within 10 sec of operation In operation only the opening is changed and the voltage can t be measured 1 If sound of the EEV is heard it indicates the EEV is basically good 2 If no sound of the EEV is heard measure the output voltage lor2 3 EEV f 4 About 5V for about 10 sec atter 5 power is switched on Red Brown Green Orange Yellow White amp 3 If there is voltage it indicates the circuit board is normal 4 If there is voltage and the EEV can t operate or has no sound it indicates the EEV is defective 5 Check method for EEV coil Measure the resistance value between the terminals with a multimeter normal cases 5 wire EEV 46 40 at 20
16. 5 67 8 9 Does the buzzer sound tens place 7 eel sn olla 52 56 58 et 20 22 26 2 0 2 34 36 pn fo eae 05 gt 16 26 Fao o 52 s 56 Nosema 62 6 se se 70 72 74 76 se so 92 va 96 L s eor osos ier 1 Tf there is no data recorded the error code is normal the information of each sensor is as Sound means negative 3 N uan Co N showed in table below Name of sensor Value displayed by the sensor when the error code is normal Temperature measured by 64 C vent pipe sensor Example Temperature of compressor vent pipe 122 C The temperature data of compressor vent pipe should be two times the reading The following 61 x 2 122 C 0 1 sec Sound of Sa When the temperature is lt 0 the buzzer will sound buzzer ON When the is 2 0 the buzzer will not sound Negative OFF T O a n n D ONOU r U 1 5 sec F RUN lamp ON tens place OFF 0 5 sec 0 5 sec 4 TIMER lamp ON ones place 11 sec cycle 47 Check data recording sheet Customer Date Equipment name Complaint Settings of remote controller Content of indication data m
17. Evacuation procedure a Check whether there is internal pressure in the machine If there is any use the inspection connector to eliminate it b Connect the service hose of the collecting pipe gauge to the gas and liquid pipes c Connect the vacuum pump to the charge hose Conduct evacuation repeatedly in the following order Turn on the vacuum pump The combined pressure gauge displays 0 1MPa 76cmHg When 0 1 MPa 76cmHg is displayed run the vacuum pump for over 15 min Close the low pressure valve Dof the collecting pipe gauge Inspection connector Turn off the vacuum pump pee hose Collecti Notes 1 Never use the pressure of the refrigerant o rio o ing pipe to purge the air 2 Never use the compressor for Charge hose 7 evacuation f Refrieerant 3 Never operate the compressor in the li 4 CEE 2 Refrigerant charging In case of leakage of R410A be sure to discharge it all evacuate the machine till the acceptance value is reached and charge new refrigerant according to the specified weight Never add refrigerant a Discharge all refrigerant from the machine and evacuate the machine Note It is unreasonable to add refrigerant without evacuation as this will cause insufficient or excessive charging b Retain the collecting pipe gauge and connect the refrigerant cylinder to the machine c Record the weight of the refrigerant cylinder on the sc
18. a reducing valve to the nitrogen cylinder b Charge nitrogen into the piping with a copper pipe and install a flowmeter on the nitrogen cylinder c Seal the gap between the piping and the inserted pipe to prevent return of nitrogen d When the nitrogen is flowing be sure to keep the end of the piping open e Adjust the flow velocity of nitrogen Use the reducing valve to keep it below 0 05m h or 0 02MPa 0 2kgf cm f After the above steps keep the nitrogen flowing till the piping cools to a certain extent that is to the finger temperature g Remove all welding flux after welding 67 Reducing valve Flowmeter Disconnecting valve From nitrogen cylinder Nitrogen Rubber stopper for sealing Figure 5 Preventing oxidation in welding Precautions for welding CD General precautions 1 The weld strength should meet the requirement 2 Keep air tightness under the pressure condition after the operation 3 During welding avoid damaging the components due to high temperature 4 Do not allow the oxide or welding flux to block the refrigerant piping 5 Prevent the welding portion from hindering the flow in the refrigerant circuit 6 Avoid corrosion of the welding portion Over heat prevention Due to over heat the inner and outer surfaces of the treated metal may be oxidized Particularly if the inside of the refrigerant circuit is oxidized due to over heat the oxide film produced wil
19. diagnosis Use the maintenance mode to read the history of stop due to the past protection control See Page 40 43 Specifically check the defective part against the content of failure according to the check method Replace the defective part and check the operation situation The air conditioner is normal Note 1 When only stop data is indicated the air conditioner is normal However when the same protection is triggered repeatedly more than 3 times which becomes the user s complaint it should be judged according to the content of failure 35 5 Indication of self diagnosis When the air conditioner stops abnormally the cause is indicated with lamps Three minutes after abnormal stop use the remote controller to start the appliance The error indication will disappear and the appliance will commence operation Indoor Indoor indication Content of failure RUN lamp TER Light up Flash 6 Error of times communication between indoor and outdoor units Flash 1 Light up Error of indoor heat time exchanger sensor Flash 2 Light up Room temperature times sensor error 2 Main cause Connection wire break poor contacting defective indoor and outdoor circuit boards defective power supply Wire break of indoor heat exchanger sensor poor plug contacting Room temperature sensor wire break poor joint contacting Indication flash light up conditions Indoor circuit board
20. during start up period The room temperature is kept constant through fine tuned control after the machine is stabilized 2 Fuzzy control According to the fuzzy control technology the room temperature and humidity etc are obtained through dynamic analysis to accurately regulate the rotate speeds of the compressor and the fan to realize precise temperature control 3 Life Actual service life over 20 000 hours Working life over 100 000 hours On off of relay over 100 000 times Continuous on of LED over 50 000 hours On off of emergency switch over 10 000 times 4 Self diagnosis function We will continuously provide the best services for our customers through devices judging abnormal operation as follows Failure Causes Flash 1 time Heat exchanger sensor error i g Heat exchanger sensor wire break poor connector connection Flash 2 times Room temperature sensor error oom temperature sensor wire break poor connector connection Flash 5 times Abnormal voltage input g Voltage too high or too low Flash 6 times Indoor fan motor error Failure of fan motor poor connector connection TIMER lamp x Flash 1 time unit temperature sensor e Outdoor unit sensor wire break poor connector connection 3 Outdoor unit heat exchanger liquid Heat exchanger liquid pipe sensor wire break poor connector RUN lamp Flash 2 times pipe sensor error connection keep
21. lt RUN lamp Buzzer lest Temp Operation Air flow setting switching switching yes no times Code of last error Temp measured by room temp sensor of last error Temp measured by indoor heat exchanger sensor of last error Info of remote controller of last error Temp measured by outdoor air temp sensor of Heating last error Temp measured by outdoor heat exchanger liquid pipe sensor of last error Temp measured by discharge pipe sensor of last error Code of second to last error Cooling Temp measured by room temp sensor of second to last error Temp measured by indoor heat exchanger sensor of second to last error lt Info of remote controller of second to last error Temp measured by outdoor air temp sensor of o Heating second to last error Temp measured by outdoor heat exchanger liquid pipe sensor of second to last error Temp measured by discharge pipe sensor of second to last error Code of third to last error Cooling Temp measured by room temp sensor of third to last error Temp measured by indoor heat exchanger sensor of third to last error Info of remote controller of third to last error Temp measured by outdoor air temp sensor of Heating third to last error Temp measured by outdoor heat exchanger liquid pipe sensor of third to last error Temp measured by discharge pipe sensor of third to last error Code of fourth to la
22. number controller of indication data of Temperature setting previous errors Last time Second to last time Third to last time 24 C 25 C e H e Heating Hi Auto Fourth to last time _ 26 to last time Example Settings of remote controller Operation Air flow Temperature Indication data switching switching setting Indicates the cause of stop indicated last time error code Indicates the cause of stop indicated second to last time error code Cooling Me Indicates the cause of stop indicated third to last time error code Indicates the cause of stop indicated fourth to last time error code 5 C Indicates the cause of stop indicated fifth to last time error code 38 Stop data Settings of remote controller Operation Air flow Temperature switching switching setting Indication data 21 C Indicates the cause of the last stop due to protection control etc stop code 22 C Indicates the cause of second to last stop due to protection control etc stop code 23 C Indicates the cause of third to last stop due to protection control etc stop code 24 C Indicates the cause of fourth to last stop due to protection control etc stop code 25 C Indicates the cause of fifth to last stop due to protection control etc stop code 26 C Indicates the cause of sixth to last stop due to protection control etc stop code 27 C Indicates the cause of seventh to last sto
23. nut is changed Therefore the side to center distance of the torque wrench for R410A vary Table 14 Difference between conventional wrench and wrench for R410A For 1 2 24mm x 55 26mm x 55 m side to center 550 kgf cm 550 kgf cm distance x 27mm x 65N m 29mm x 65N m side to center 650 kgf cm 650 cm distance x torque 69 e Flare tool clutch type e The flare tool for R410A has a big clamping bar receiving hole so as to set the copper pipe portion protruding from the clamping bar during flaring to 0 0 5mm and have stronger elasticity for the increased torque of EEV This type of flare tool can also be used for R22 copper pipes f Adjusting the scaled rule for the protruding portion used when a conventional flare tool including clutch type is used for flaring A scaled rule with the thickness of 1 0mm helps setting the protruding portion of the copper pipe in the clamp to 1 0 1 5mm g Vacuum pump adapter e In order to prevent the vacuum pump oil from returning into the charge hose be sure to use an adapter The connection of the charge hose has two ports one for conventional refrigerants 7 16 UNF 20 screw threads per inch and one for R410A If the vacuum pump oil mineral oil is mixed with R410A deposit may be produced which will damage the appliance h Refrigerant cylinder e According to the U S A regulations refrigerant cylinders designed specifically for R410A
24. of the air conditioner from which refrigerant is to be recovered If there are any blocking components such as EEV etc please fully open such components Manifold pressure Air conditioner from which Z amp 8U8C refrigerant is recovered Refrigerant recovery Outlet Recovery cylinder device Inlet 3 Connecting the refrigerant recovery device a Connect the air conditioner from which refrigerant is to be recovered to the refrigerant recovery device With service opening recovery port Use the manifold pressure gauge to connect the charge hose to the service opening recovery port Without service opening recovery port Use the needle valve to connect in a way similar to b Connect the refrigerant recovery device to the recovery cylinder 73 4 Recovery procedure a According to the instructions on refrigerant recovery device see the operation manual supplied operate the device to recover refrigerant b Pay attention to the following during the operation Confirm that the refrigerant recovery device runs according to the requirements and the operation status is always monitored so as to take correct actions in case of emergency During the operation stay at the working site to ensure safety If you have to leave the working site due to irresistible reasons confirm the recovery cylinder is not over charged before stopping the operation c If during the operation the overcharg
25. po ore pipe connection cover the pipes with tape etc to prevent dust sand etc from entering Indoor Outdoor Caution Do not apply 72 4 A A A af 7 Do not turn pa Q WT Q refrigerating DS N Press iquid side 49 1 mm WU Remove Remove Gas side Models 20 35 13 2 gt 25 74 I machine oil to the flared surface o Screw off the flare o Screw off the Mount the flare nut screwed off nut liquid and gas flare nut liquid onto the pipe to be connected to sides and gas sides form a trumpet shape 29 Measurement B mm Copper pipe Clutch type flare tool Conventional R22 flare tool diameter for R410A Clutch type Faring Model Wing nut type 1 5 2 0 Measurement SRK25 35QA S SRK25 35QA S Use a flare tool designed for R410A or a conventional flare tool Please note that measurement B protrusion from the flaring block will vary depending on the type of flare tool in use If a conventional flare tool is used please use a copper pipe gauge or a similar instrument to check block pipe protrusion so that you can keep measurement B to a correct value Flaring 1 Copper Caution not apply excess torque to the flared nuts Otherwise the flared nuts may crack depending on the conditions and efrigerant leak may occur Connection Indoor Outdoor Liquid side D Liquid side Gas side Gas side
26. radio receiver is placed within 5m Locations where drainage cannot run off safely It can affect surrounding environment and cause a complaint Do not install the unit where corrosive gas such as sulfurous acid gas etc or combustible gas such as thinner and petroleum gases can accumulate or collect or where volatile combustible substances are handled Corrosive gas can cause corrosion of heat exchanger breakage of plastic parts and etc And combustible gas can cause fire Do not use the base flame for outdoor unit which is corroded or damaged due to long periods of operation Using an old and damaged base flame can cause the unit falling down and cause personal injury Do not touch the suction or aluminum fin on the outdoor unit This may cause injury 5 1 Selection of installation location Do not install the outdoor unit in a location where insects and small animals can inhabit Insects and small animals can enter the electric parts and cause damage or fire Instruct the user to keep the surroundings clean Do not install nor use the system close to the equipment that generates electromagnetic fields or high frequency harmonics Equipment such as inverters standby generators medical high frequency equipments and telecommunication equipments can affect the system and cause malfunctions and breakdowns The system can also affect medical equipment and telecommunication equipment and obstruct its f
27. refrigerant quantity to be charged includes the refrigerant in 15m connecting piping 5 Purging is not required even for the short piping 2 2 Range of usage Please use the air conditioners within the following range of usage otherwise the protector will be triggered was Cooling Operation Heating Operation Outdoor temperature About 18 C 43 C About 15 24 C Room temperature About18 C 32 C About below 30 C Indoor humidity About below 80 At least 85 of rating Max 10 times per hour 3 min 2 3 Outline drawing 1 Indoor unit SRK25QA S SRK35QA S Unit mm ane Remote controller Terminal block 8 52 380 Flare connecting Liquid 2 Outdoor unit SRC25QA S SRC35QA S Unit mm MITSUBISHI HEAVY INDUS TRICS LTD Flare connecting Flare connecting 6 35 1 4 9 52 3 87 Mneratian 2 4 Cooling cycle system diagram Models QA S Series Circulation of cooling Indoor unit Outdoor unit Circulation of heating Operation valve Gas Flare connecting Outdoor air temp sensor Gas pipe Note 1 model 9 52 Refrigerant outlet I Inlet air temp Sensor pipe Air heat exchanger sensor x heat exchanger Heat exchanger pen l 2S sensor Filter Hush pipe Hush pipe BOE Electronic expansion valve Note 1 line is piping fo
28. the copper pipe There are a number of types available on the market which have different names b The edge of needle may be damaged easily so such valve should be treated as semi supplies c When the vacuum level rises air will be absorbed into the hole easily Therefore please operate carefully 1 i i W m ies XL i lt 1 p Needle valve 6 Vacuum pump For evacuating the recovery device and the recovery cylinder Air inlet Vent 75 8 MOUNT ASSEMBLY 8 DISASSEMBLY EXPLANATORY DRAWING 8 1 Indoor unit 8 1 1 SRK25QA S RAC SRK25QA S HEAT amp EXCH amp CONTROL 1 8 HEAT EXCH ASSY AIR 1 76 17 RYD503A011A DISPLAY ASSY aem jemen RYDO08A043D PARTS STANDARD RYD012A192 MANUAL INSTRUCTION amp INST RYD011H050D ENERGY LABEL 77 HEAT EXCH amp CONTROL RAC SRK25QA S PANEL amp FAN ASSY a imme IC foe e RYD511A015 MOTOR AC 14 RYD435A023H GRILLE ASSY AIR OUT 5 RYD129A043 16 RYD512T002H MOTOR STEPPING 17 RYD935C001 COLLAR 79 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 18 RYD436A018J FLAP A RYD436A019J FLAP B 20 21 RYD436A021 LOUVER ASSY RYD436A020 LOUVER RYD129A048 PLATE CONNECTING PANEL amp FAN ASSY
29. the fuzzy calculation drops below 24 rps during the cooling fuzzy operation the operation changes to the cooling constant temperature operation e Detail of operation SRK25QA S SRK35QA S Inverter instruction 0 rps Comp stopped frequenc According to the Indoor Fan Operating Mode Table corresponding to fan speed Stop 17 c HI POWER Cooling operation HI POWER button on remote controller ON Unrelated to set temperature Continuous operation 10115 minutes SRK25QA S SRK35QA S Inverter instruction frequenc Detail of operation 7th speed Outdoor fan Corresponding to instruction frequenc Notes 1 Room temperature can t be adjusted during the HI POWER operation 2 Priority is given to actuation of protective device even during the HI POWER operation 4 8 Outline of drying operation 1 After the fan commences operation 1st speed for indoor fan 3rd speed for outdoor fan within 20 seconds after the start of operation the room temperature TION the outdoor air temp sensor TO and set temperature SP are checked to determine whether to use cooling amp drying or heating amp drying e TION gt SP 3 or TO gt 19 C cooling amp drying e TION x SP 3 or TO 19 C heating amp drying Cooling amp drying or heating amp drying is selected again one hour after selection 2 Outline of control a Cooling amp drying e Room temperature TION set temperature SP and value of humidity sen
30. when the air Correct voltage refers to the voltage between conditioner does not run at all 198 242V Has the cable been inserted in the power supply with correct No Check that the cable is inserted in the correct power supply voltage Check the operation situation Yes Switch off the power supply and open the flap manually Is No Is the current protective tube Yes the flap closed when the cable on the circuit board of the is inserted into the power indoor unit broken supply gt 7 7 Yes If the bonded parts are To Check method for not damaged replace the protective tube and check the operation situation circuit board Does the system issue the sound for receiving No signals when the remote controller operates _ Pe Replace the indoor To Remote controller circuit and check the failure diagnosis method operation situation 34 4 Procedure of failure diagnosis when the air conditioner can run Confirm the content of failure of the user s air conditioner No Yes Is the cause of error confirmed Confirm the displaying of self diagnosis Eliminate the cause of error and check the operation situation See Page 37 N Has the self diagnosis been i Use the to read past conducted indication of self diagnosis Yes See Page 40 43 Yes Is there any history of indication of self
31. 1 When the ECONO button is pressed the power is controlled for gentle operation in the status which is not too cold or too hot In this case the temperature in the Cooling mode is higher than the set temperature by 1 5 C increasing 0 5 C per hour and the temperature in the Heating mode is lower than the set temperature by 2 5 C decreasing 0 5 C per hour SRK25QA S SRK35QA S frequenc indoor fan outdoor fan 4 11 Air blowing operation 1 When the fresh air signal from the remote controller is received the fresh air operation begins 2 The so called fresh air operation refers to the air blowing operation in the whole machine with filter Air flow switching tomatic Hi Economical Instruction frequency HZ 0 Rotate speed of indoor fan 6th speed Sth speed 4th speed 3rdspeed 2ndspeed Rotate speed of outdoor fan 3 In this control the continuous transmission error protection function can be neglected 4 In the fresh air operation all timing functions are effective 21 4 12 CLEAN operation control About CLEAN operation In the cooling and drying mode when the unit is turned off the fan of the indoor unit will continue to run for 120 minutes to discharge the water from the unit for the purpose of mould proof LEAN setting Example Setting of CLEAN operation when the unit is turned off after cooling operation
32. 2 Mounting refrigerant pipes 7 2 1 Piping materials and joints used Refrigerant pipes are mounted mainly with copper pipes and joints Be sure to select and mount copper pipes and joints suitable for refrigerant In addition be sure to use clean copper pipes and joints and try to keep their inner walls clean 1 Copper pipes Be sure to use seamless copper pipes made of copper or copper alloy Copper pipes with residual oil less than 40mg 10m are ideal Do not use fractured distorted or discolored copper pipes especially in respect of inner walls Otherwise the filth may block the EEV or hush pipe As the pressure of air conditioners using R410A is higher than that of air conditioners using R22 be sure to select appropriate materials The thickness of copper pipes for R410A is shown in Table 3 Never use copper pipes with a thickness less than 0 8mm Table3 Thickness of annealed copper pipes ee Thckes mm Rating diameter Outside diameter R410A Reference mm R22 1 4 3 8 1 2 12 70 5 8 15 88 62 2 Joints Copper pipes use flared joints or sleeve joints Be sure to clean them before use a Flared joints Flared joints are used to connect copper pipes that can t be used for piping as their outside diameter exceeds 20mm In such case sleeve joints may also be used The sizes of ends of flared pipes ends of flared joints and flare nuts are shown in Tables 5 8 see pages 112 and 113 In addition double ended loo
33. 5 Temp C Molecular weight Boiling point C O 3 07 040 Vapor pressure 25 C MPa 3 73 2 33 Density of saturated 64 0 vapor 25 C kg m mue o DN potential ODP potential GWP NIST REFPROP 5 10 etc prepared by Source Thermo physical Properties List NIST REFPROP JRAIA V5 10 etc prepared by JRAIA 61 3 Lubricants for R410A Mineral oil AB Alkybenzene etc are widely used as the lubricants for R22 R410A 18 not easily dissolved in conventional lubricants such as mineral oil etc and such lubricants likely stay in refrigerant cycle so ester ether and other synoil in which R410A is highly dissoluble are generally used However such synoil has high hygroscopicity so they must be handled more carefully than conventional lubricants In addition if such synoil is mixed with mineral oil AB Alkybenzene etc this may cause deterioration thus blocks the hush pipe or causes failure of compressor Therefore never mix these synoil 7 1 2 Safety of installation servicing The pressure of R410A is higher than that of R22 by about 1 6 times so unreasonable installation servicing may cause severe consequences Therefore be sure to use tools and materials designed specifically for R410A conduct installation servicing carefully and pay attention to the following precautions 1 Never use refrigerants other than R410A in air conditioners designed to use R410A 2 In case of refrig
34. 6208 Fax 44 0 20 7421 6209
35. 8 1 Tools for R410A a Manifold pressure gauge As R410A has the property of high pressure conventional tools can t be used Table 11 Difference between conventional high low pressure gauge and pressure gauge for R410A Conventional pressure gauge Pressure gauge designed specifically for RAIOA High pressure gauge D 173 5 0 1 5 Red 76 cmHg 35 kgf cm e 16 cmHg 53 kaf em Compound pressure D 1 1 1 3 gauge Blue 76 cmlg 17 kgf cm 76 cmHg 38 kel In order to prevent charging other types of refrigerant accidently the shapes of the various ports of the branch manifold are changed Table 12 Difference between conventional branch manifold and branch manifold for R410A Conventional branch manifold Branch manifold for R410A e Port size 7 16 UNF 1 2 UNF 20 screw threads per inch 20 screw threads per inch b Charge hose Due to the property of high pressure of R410A the pressure impedance of the charge hose must be improved and the material is changed to HFC impedance type material Furthermore in order to comply with the sizes of the various ports of the branch manifold the sizes of hose caps are also changed In addition in order to prevent gas pressure reaction the charge hose with a valve mounted beside the hose cap may be used Table 13 Difference between conventional charge hose and charge hose for RA10A Conventional cha
36. C red and white red and orange brown and green red and yellow Q brown and yellow red and white 15 Check method for outdoor fan motor 1 25QA S uses AC motor Turn on the appliance as usual and measure whether there 1s 220V voltage input between the terminals D and C and terminals D and 9 of the motor for the outdoor unit 220V voltage input between the terminals D and when the air flow is high between the terminals and 9 when the air flow is low If the motor can operate normally it indicates the motor is normal if there is voltage input but the appliance can t operate normally it indicates the motor is abnormal lt lt lt lt 220V Hi Lo Yellow White Black Red 2 N x FMo 58 2 35Q S uses DC motor e Failure diagnosis method for outdoor circuit board or motor when the fan motor can t operate e Check it after confirming the indoor unit is normal 1 Output check of outdoor circuit board 1 Unplug the plug 2 Remove the plug CAN for the outdoor fan motor 3 Insert the plug and press and hold the back up switch for over 5 sec ON till the indoor unit commences operation If 20 sec after the back up switch is turned ON the contact pin No Q of the plug as shown in the following figure outputs voltage for about 30 sec it indicates the circuit board is basically normal and the fan motor malfunct
37. Charging port and package for refrigerant cylinder RE j Gas leakage detector ____ Used when the conventional flare tool clutch type is used g Vacuum pump adapter Note If you have any questions please consult your dealer 70 7 3 2 New installation when new refrigerant piping is used 1 Use the vacuum pump to suction air and detect any gas leakage see Figure 6 a Connect the charge hose to the outdoor unit D b Connect the charge hose to the vacuum pump adapter Here fully close the control valves c Push Handle Lo to the full open position and turn on the power switch of the vacuum pump In this step evacuate the appliance for about 10 15 minutes For the time of evacuation see the manual provided by the equipment manufacturer d When the pointer of the compound pressure gauge indicates 0 1 76cmHg push Handle Lo to the full close position 5 and turn off the power switch of the vacuum pump Keep the status for 1 2 minutes and ensure the pointer of the compound pressure gauge has not turned back e Fully open the control valves f Disconnect the charge hoses 0 g Tighten the cover on the service opening 7 h Secure the covers on the control valves and check for any gas leakage around the covers 9 Compound Manifold pressure pressure gauge gauge 76cmHg a Handle Lo e Handle Hi ale g always closed Charge hose Charge hose Vacuum pump adapter L
38. ELECTION 2 1 Model function 2 1 1 Model SRK25QA S Indoor unit SRC25QA S Outdoor unit Item Indoor unit SRK25QA S Outdoor unit SRC25QA S Net weight Machine 790x222x268 780x290x540 dimension Package Lengthx Width 830x340x280 920 380 590 dimension xHeight Color White Ash colored Fan Through flow type AS resin glass Axial flow type AS resin glass fiber fiber 1830 Hi Me Lo 45 completely mute SPL Noise in warm dB A Hi Lo 48 completely mute SPL Fan motor 16W 4 step capacitor type 25W AC motor insulation grade B asynchronous motor insulation erade E value control value Power supply and Single phase 220V 50Hz and 3 core 1 0mm 250V 10A 2m w o plug power cord Heat exchanger Spiral hydrophilic 3 folded Spiral hydrophilic 20 section 16 section 2 row 452 fin 1 2 1 row 621 fin 2 1 circuit Noise in cool dB A room Air flow 7h A lt circuit Nominal value THACOM RM B5077MDE2 527W DC frequency conversion compressor insulation grade E Refrigerating ml 300 DIAMOND FREEZE MA68 machine oil Refrigerant Electronic expansion valve 1 65mm hush pipe controller Refrigerant R 10A 850g addition reduction not needed within the use range of 15m Compressor Operating p Max 4 1 Min 1 47 pressure limit Air filter Mould proof air filter ccessories an Indoor unit 1 mounting plate 1 tapping screw 5 battery 2 use and quantity install
39. I Us Vacuum pump Control valve 2 way 777777 b Lhe Notes Te e Be sure to carefully read the user s manuals before using ED the vacuum pump vacuum pump adapter and manifold pressure gauge N e Ensure the oil level in the vacuum pump complies with the Ne level specified in the oil level indicator Service opening Control valve 3 way Figure 6 Evacuation structure of vacuum pump 2 The refrigerant pipe required for additional refrigerant charging should be longer than the standard pipe length After step e in 1 above execute the following steps See Figure 7 a Put the refrigerant cylinder on the electronic loadcell scale and connect the charge hoses of the cylinder to the connection ports of the electronic loadcell scale Note Be sure to make setting so as to charge liquid When a cylinder with syphon tube is used you can charge liquid without turning the cylinder b Connect the charge hose of the manifold pressure gauge to the connection port of the electronic loadcell scale 300 c Open the valve of the refrigerant cylinder and slightly open the charging valve and then close it O 4 After zero position 0 adjustment open the charging valve and open Valve Lo of the manifold pressure gauge to charge the liquid refrigerant Please read the user s manual before using the electronic loadcell scale e If the specified amount of refrigerant can t be charged charge more little by lit
40. LALAIT dO SNOLLNSILV 55 2 Circuit diagram of 35QA S outdoor unit AONVHOSIG ALANIN S AALAY 21 5 WHMOd HHI 410 102 OL CHAN 1109810 ONIOVIdSN AI OINOMIOHTH HHL NI HOIH SI MAAHI NOLINALIV HDOVI 10A W AETOXL ASTOXL 40424 JD SUVA LIII KALNO JO SIVIDA F ONA A A NO BOSSHUdROO 32VIT0A HHI ONLLOEDKI NOISWAANOO AONZIB AO MALNO HHI 6 SELL 30 114100 20 ALTddNS HAMO Z HALL 40 INANI OV 174415 AAMOA 1 THVOH HHL NO HJV IAI SKLINTHd 01 SNLLNIHd OI NVO 5141041521 AI MYTIOH SV 32VI 0A 40 SINIOdISSI AROS ASV SIHI NI A9VL TOA DAAT OL INYA MAHA ANT HHL 330 HdygOS OL MAAN OS ONLINIJJ HIHA ATI JOOUTRANLSTOR ONIAVAKS dO dSnvodd TOULNOO OINOULOATA DNILOSIHQ 30 SNOLLNALLY 13 Check method for outdoor circuit board inverter Make confirmation after checking that the indoor circuit board is normal D Use a multimeter to conduct inspection a Unplug the plug b Remove the output cables U V and W to the compressor of the power transistor Note The inspection of inverter can be conducted only after the capacitor is discharged and after making sure the residual voltage is below 10V c Insert the plug and press and hold the back up switch for over 5 sec till the applianc
41. Please use one designed specifically for RA10A e Please use an anti reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from running back into the system Oil running back into an air conditioning system may cause the refrigerant cycle to break down Heat insulation for joints Finish and fixing Cover the joint with insulation material for the Apply exterior tape and shape indoor unit and tape it along the place where the pipes ve Crossover wires s Position so the slit n Ground wie Will be routed Z rxterior tape Secure to the wall with a pipe 8 Drainage pipe clamp lt Tapping screw Vinyl tape NA K Pipe clamp Earthing Work o Earth work shall be carried out without fail in order to prevent electric shock and noise generation o The connection of the earth cable to the following substances causes dangerous failures therefore it shall never be done City water pipe Town gas pipe TV antenna lightning conductor telephone line etc 30 Moving or removing the appliance In order to meet the requirement of environmental protection pump down recovering refrigerant is required The effect of pump down is to return the refrigerant from the indoor unit to the outdoor unit when the pipes are removed from the main frame Pump down method Connect the charge hose to the service port 2 Liquid side Close the liquid valve with a hexagon wrench Gas side Fully open the gas val
42. R410A or conventional flare tools The size of flaring varies depending on the kinds of flare tool Please note that the size must be adjusted to Size A with the size adjustment scaled rule when using conventional flare tools Figure 3 Flare tool Table 5 R410A flaring sizes k Flare tool for R410A Conventional flare tools Clutch type 01 5 Rating diameter Outside diameter A mm Flare tool for R410A Conventional flare tools Clutch type os she CT er Figure4 Relationship between flare nut and flaring sealing surface Table 7 Sizes of R410A flaring and flare nut Rating Outside diameter diameter 64 Table 8 Sizes of R22 flaring and flare nut 63 mat s 2 Flaring procedure and precautions a Ensure there is not any defect or dust etc on the flaring and connection b Correctly connect the flared surface and the joint axis c Use a torque wrench to tighten the flaring to the specified torque The tightening torque for R410A is the same as that for R22 Insufficient torque may cause gas leakage Excessive torque may cause the flare nut damaged and can t be removed Please select the tightening torque of the value specified by the manufacturer Table 9 shows the reference values Note Apply the oil specified by the manufacturer on the flared surface If other types of oil are used it may cause deterioration of t
43. When the air conditioner is in the stop mode press the ON OFF button Press the MODE button to set the cooling mode Press the CLEAN button and CLEAN indication on the display will light up INI I Cancelation of CLEAN operation Press the CLEAN button and CLEAN indication on the display will disappear 4 13 Electronic expansion valve EEV control function 1 General control range 0 470 pulse 2 The open loop control and area control are combined for EEV control 22 5 Installation Precautions for installation Use this system only for household and S residence This appliance must be installed according to the national wiring regulation A 2 level switch must be used for the fixed wiring of the power supply and its disconnection clearance must be at least 3mm o If the outdoor unit may tip over or move and drop from the original installation location use trip bolts or string to secure it in place The liquid pipe and gas pipe in the piping should be insulated with thermal insulation SAFETY PRECAUTIONS Please read this SAFETY PRECAUTIONS carefully before the installation work in order to ensure correct installation The precautions described below are divided into and CAUTION The matters with possibilities leading to serious consequences such as death or serious personal injury due to erroneous handling are listed in the A WARNING however the matters listed in may som
44. ale This is necessary to ensure the amount of refrigerant to be charged d Purge the air in the charge hose Loosen the connection between the charge hose and the collecting pipe gauge open the valve for several seconds and tighten the connection immediately after the gas blown from the loose part is observed e After the air is released from the charge hose 9 open the valves and and the refrigerant gas will immediately flow from the cylindar into the machine Ensure the refrigerant cylindar is kept vertical to allow the gas to flow into the machine f The refrigerant will not move several procedures after it is charged into the system In such case start the compressor to start the cooling cycle till the machine is fully charged with gas of the specified weight After the amount of refrigerant is determined close the valve 3 h Remove the charge hose from the mahine Cover the valve mouth of the refrigerant pipe with the blanking cover and tighten it 1 Use the gas leak detector to check for any leakage along the piping j Start the air conditioner and ensure that its operation the high low pressure and temperature difference between inlet air and outlet air etc are normal 60 7 Service Manual for Air Conditioners with Refrigerant Piping Mounted Using R410A Refrigerant The following is selected from the document published by The Japanese Refrigeration and Air Conditioning Industry Association
45. are marked with the refrigerant name and have pink coating 1 Charging port and package for refrigerant cylinder e According to the cap size of the charge hose a charging port 1 2 20 screw threads per inch and corresponding package are required j Gas leakage detector eUse a highly sensitive gas leakage detector designed specifically for HFC refrigerants For R410A the detection sensitivity is about 2327 year 2 Frequently used tools a Vacuum pump b Torque wrench g Hollow drill 65 70 h Hexagon wrench For 1 4 side to center distance 17 mm x 16 N m 160 kgf cm For 1 4 side to center distance 17 mm x 18 N m 180 kgf cm For 3 8 side to center distance 22 mm x 42 N m 420 kgf cm side to center distance 4 or 5 mm 1 Wrench or monkey wrench j Tapeline k Thermometer c Pipe cutter 1 Clamping ammeter d Driller m Insulation resistance meter e Screw driver megameter f Steel saw n Circuit tester Pipe bender 3 Applicability of tools for R410A to models using R22 Table 15 Applicability of tools for R410A to models using R22 L ToolsforR4I0A Applicability to models using R22 tn b Chargehose PK _ c Electronic loadcell scale for charging refrigerant _ d Torque wrench rating diameter 1 2 5 8 ___ J X _____ Flare tool clutch type O Scaled rule for adjusting protruding portion Refrigerant cylinder p
46. ation manual 1 remote controller 1 outdoor unit 1 Drain elbow 1 Water shutoff plug 1 Net weight Color Airflow Refrigerant Airfilter A ies and Operation control Wireless remote controller electronic thermostat controlling room devices temperature microcomputer controlling defrosting Safety devices Serial signal protection fan error protection compressor over heat protection high voltage protection over current protection etc The nominal values of Noise in cool room and Noise in warm room in the above table are tested in a dead room Energy efficiency grade Note 1 The data are measured at the following conditions The pipe length is 5m 2 The operation data are applied to the 220Vdistricts respectively 3 The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping Purging is not required even for the short piping 2 2 1 2 Model SRK35QA S Indoor unit SRC35QA S Outdoor unit Indoor unit SRK35QA S Outdoor unit SRC35QA S imensio dimension x Height x Ash colored fiber fiber embedded damping spindle sleeve 1940 room room Fan motor Nominal value 16W 4 step capacitor type 24W DC motor insulation grade E asynchronous motor insulation grade E i value 8 control value pL Single phase 220V 50Hz and 3 1 0 1 250V 10A 2m w o plug power cord Heat exchanger Spiral hydrophil
47. changes within the range of selected air flow p SRK25QA S SRK35QA S 30 110 rps 30 112 rps Airflow Corresponding to frequenc 30 112 rps Airflow _ th speed 30 72 rps 30 78 rps 1 Aifllw ___ J Sthsped ____ 30 50 rps 3rd speed b When the defrosting or protection device is actuated operation is performed in the corresponding mode c Outdoor fan operates in accordance with the instruction frequency 3 Details of control in each operating mode a Fuzzy operation Deviation between the room temperature setting compensation value and the suction air temperature is calculated in accordance with the fuzzy rule and used for control of the air flow and the inverter frequency b Heating constant temperature operation HEAT operation e Operating conditions If the frequency obtained with the fuzzy calculation drops below 24 rps during the heating fuzzy operation the operation changes to the heating constant temperature operation e Detail of operation SRK25QA S SRK35QA S Inverter instruction 0 rps Comp stopped frequenc Heat retaining normal operating mode 1st speed OFF According to the stop mode According to the HEAT and DRY flap control c Heat retaining operation During the heating operation the indoor fan is controlled based on the temperature of the outdoor heat exchanger measured by indoor heat exchanger sensor to prevent cool wind from blowing e Normal operation Usual h
48. ckage of hush pipe etc Power cut Open phase of output terminal of compressor compressor lock Whether there is no short circuit Yes Check the compressor No Failure of inverter Has No 4A Failure of inverter A Visually inspect wiring of gt Check winding coil resistor about several Q Has 11 Check insulating resistor above 1M In normal cases the compressor is locked i j Disconnect the wiring of amp Ensure the space of air suction and air compressor and Has all three phase output voltage been applied 50 Serial signal transmission error Wrong power supply and signal cable connection failure of indoor and outdoor PCB error of power supply system noise etc not failure of machine Correct the indoor and outdoor connection Yes Failure of indoor PCB No eee Yes Is there AC voltage of 220 230 240V between outdoor Failure of indoor aa Check the terminal block 1 2 connection Yes Failure of outdoor PCB lt Failure caused by one time reason Replace the protective tube choke etc Yes No AN AN ZN Yes Yes Dose Yes Indoor fan motor error Failure of fan motor failure of indoor PCB Is the connection of the connector normal Dose Has voltage been applied to the fan Failure of indoor PCB motor Is the Failure of fan m
49. current stops in the safe current II current mode during cooling operation Flash 5 Cooling safe Excessive refrigerant Safe current stops in the safe current III times current III mode during cooling operation 40 Flash 3 times Flash 4 Heating safe Excessive refrigerant Safe current stops in the safe current II times current II mode during heating operation Flash 6 36 Heating safe Excessive refrigerant Safe current stops in the safe current III times current III mode during heating operation Flash 7 37 Heating safe Safe current stops in the safe current times current III mode during heating operation 43A Compressor lock 41 Content of failure No of flashes in service mode Stop code or error code BE E NN 41 Safe current Cooling overload 1 outdoor temp 36 40 C Heating overload 1 outdoor temp 5 12 C Cooling overload 2 outdoor temp 40 45 C Heating overload 2 outdoor temp 12 17 C Cooling overload 3 outdoor temp 45 C Heating overload 3 outdoor temp 17 C Flash 5 Off 50 Compressor 125 C times over heat Flash 6 Off 60 Error of indoor Can t receive and outdoor communication 61 times signals for 1 min and 55 sec Flash 1 time Flash 1 time Flash 4 times Flash 2 times Flash 3 times Flash 4 times Flash 5 times Flash 6 times continuously reply in communication Poor indoor and outdoor connection Flash 2 times
50. e Be sure to use only for household and residence If this appliance is installed in inferior environment such as machine shop etc it can cause malfunction Use the original accessories and the specified components for installation If parts other than those prescribed by us are used it may cause drop of machine water leaks electric shocks fire refrigerant leakage insufficient performance poor control and personal injury nstall the unit in a location with good support and ensure the unit is stable when installed so that it can withstand earthquakes and strong winds Unsuitable installation locations can cause the unit to fall and cause material damage and personal injury Ventilate the working area well in the event of refrigerant leakage during installation If the refrigerant comes into contact with naked flames poisonous gas is produced When the equipment is to be installed in a small room take preventive measures to avoid refrigerant leakage exceeding the density limit Consult with the installation professionals about the preventive measures If the density is greater than the limit of refrigerant it may cause serious accidents such as refrigerant leakage shortage of oxygen etc Confirm there is no refrigerant leakage after the installation If the refrigerant leaked comes into contact with the fire of an air blowing type heater oven etc poisonous gas is produced Use the prescribed pipes
51. e 2 In the DRY or Automatic DRY mode the function does not work However in the Automatic DRY mode the operation described in 1 commences 3 During the comfort reservation operation the RUN lamp and TIMER lamp light up After expiration of the timer the TIMER lamp goes off Example HEAT Detect the temperature difference to compensate the start time of next operation Set temp eee deedeetee 4 Room temp 15 min 10min 5min time set earlier earlier earlier e If the difference between the set temperature and room temperature is 4 C according to the above table the correction value is 5 minutes therefore the start time of next operation 18 15 minutes earlier 5 minutes 20 minutes earlier Start time of current operation Compensation value 14 4 6 Outline of heating operation 1 Operation of functional components Instruction frequenc Changed to a value other Functional Instruction frequency 0 q y than 0 due to abnormal other than 0 component i Indoor fan motor 0N Swinging flap ON or OFF ON or OFF ON Indication Light up or flash ON Outdoor fan motor Depending on Stop mode 4 ON Indoor continuous way valve instructions 1 Depending on Stop mode Depending on Stop mode ON ig 52C rela ON C OFPinStop mode Depending on EEV Depending on Stop mode EEV control 2 Air flow switching a The inverter instruction frequency
52. e commences operation d Measure the voltages between U and V V and W and W and U of the power transistor with the analogue instrument within the range of If the voltages between U and V V and W and W and U as shown in the following figure can be detected regularly it indicates the outdoor circuit board is normal Compressor start test running voltage About AC m The indoor RUN lamp flashes 2 times and the TIMER lamp flashes 2 times Error code 73 76 About 10 sec About 300 sec 4 gt Press and hold the switch on the main frame for over 5 sec ON The indoor RUN lamp flashes 2 times and the TIMER lamp flashes 2 times Error code 73 76 Note 1 After the one time output one minute after this power transistor outputs voltage the error of the indoor unit is detected 11 Judgment through defective inverter detector MRE part number SA01927 1 Detector setting procedure a Switch off the power supply turn off the switch b Remove the output power transistor U V and W of the inverter control circuit board from the connection of the compressor c Connect the wires of the detector U Red V White W Black to the terminal wires of the power transistor 2 Judging the operation method a Insert the plug and press and hold the back up switch for over 5 sec till the appliance commences operation b Confirm the flashing and ON status of the 6 LEDs The flashing and ON status
53. e signal cable and signal cabling error Defective indoor and outdoor circuit boards Poor indoor and outdoor connection Defective indoor and outdoor circuit boards Defective indoor and outdoor circuit boards Wrong operation of electromagnetic noise Defective compressor Output missing phase of compressor Defective EEV Operation with overload Defective outdoor circuit board Defective compressor Output missing phase of compressor Defective EEV Operation with overload Defective outdoor circuit board Defective compressor Compressor wiring break Short circuit of compressor wiring Defective outdoor circuit board Defective compressor Compressor wiring break Short circuit of compressor wiring Defective outdoor circuit board Defective compressor Compressor wiring break Short circuit of compressor wiring Defective outdoor circuit board Defective compressor Compressor wiring break Short circuit of compressor wiring Defective outdoor circuit board Defective fan motor Poor socket connection Defective indoor circuit board Wire break of vent pipe sensor Poor socket contacting Wire break of indoor heat exchanger sensor Poor socket contacting Wire break of heat exchanger liquid pipe sensor Poor socket contacting High indoor humidity Defective humidity sensor Reduced indoor air flow Wire break of indoor heat exchanger sensor Overload in heating Reduced indoor air flow Short circuit of indoor heat exchan
54. e protection of the refrigerant recovery device is triggered and the device stops automatically please replace with an empty recovery cylinder d If the reading of the pressure gauge increases not long after the recovery is completed and the refrigerant recovery device stops automatically please restart the device If the device stops again end the recovery 5 Procedure after the recovery is completed a Close the valves of the air conditioner from which refrigerant has been recovered the refrigerant recovery device and the recovery cylinder b Disconnect the recovery cylinder for charging refrigerant and store it according to the regulations 7 4 2 Accessories tools A number of accessories tools are used to recover R410A The following are standard accessories 1 Recovery cylinder Use the recovery cylinder specified by the equipment manufacturer Be sure to use a removable cylinder compliant with the laws and regulations Do not use a general cylinder as recovery cylinder Note 1 The cylinder used when R410A is bought is borrowed Note 2 The cylinder used when R410A is bought which has a check valve can t be used as recovery cylinder Types divided by function Liquid valve Gas valve LL Insert the conduit of the liquid valve near the bottom of the cylinder Gas valve For releasing gas a Basic type b 2 port valve c Floater type e port valve e Can provide liquid dedicated cylinde
55. eating operation HI POWER operation Values of A Indoor fan B At 0 rps 25 instruction Other than 0 15 a DS instruction lt OFF b 22 28 295 31 5 34 36 37 5 39 40 42 Temp of indoor heat exchanger C Note 1 For the values of A and B see the above table 5 Heat retaining M mode automatic economical operation 15 minutes e Values of A B B At 0 rps 25 instruction E Other than 0 15 rps instruction E a b 2 30 33 36 38 40 45 Temp of indoor heat exchanger C Note 1 For the values of A and B see the above table d Defrosting operation 1 Starting conditions The defrosting operation is started only when all of the following conditions are met 35 minutes after start of heating operation accumulated operation time 35 minutes after end of defrosting operation accumulated compressor operation time The temperature measured by the outdoor heat exchanger liquid pipe sensor Th4 has been below 5 C for 3minutes continuously Temperature measured by outdoor air temp sensor Th5 Temperature measured by outdoor heat exchanger liquid pipe sensor Th4 gt 5 C During compressor operation However the defrosting can t operate within 10 minutes after the compressor commences operation In addition if the count exceeds 10 times when the inverter frequency of the indoor controller is 0 rps d
56. ecure the front panel Mount the air filter amp the air inlet grille Caution If the wall is 1 2m or above in Selection of installation location Where there are no obstructions and where cool air and warm air can blow in the room Where the indoor unit or wall does not vibrate and where is strong Where there is adequate space for servicing The space mentioned below is safe Where wire and pipe mounting is convenient Where direct sunlight and strong light do not hit the unit Where water from the unit can drain easily Where there is at least 1 meter distance from the TV set or radio Otherwise it may interfere with TV reception or produce noise Outdoor unit Where rain snow and sunlight do not directly hit the unit and where there is enough air circulation Where blasts of cold or hot air and noise do not bother the neighbors At least 6 5 cm from ceiling At least 5 cm from wall Mounting plate At least 10 cm from wall EP TO fi ye Electric component service panel Where there are installation and servicing conditions A location where vibrations are not enhanced and where is strong Please avoid the following locations A location near the room etc to prevent the operating noise from causing trouble Where there are possibilities of flammable gas leaks Where there is constant exposure to harsh winds
57. ed heating operation begins 3 minutes 3 min timer after the stop of the compressor When the room temperature TION is higher than the set temperature SP by more than 2 C the room temperature TION and set temperature SP are checked every 5 minutes to determine the operation range of heating amp drying Operation ranges are shown in the table below a TION lt SP 1 SP 1 lt TION lt SP SP lt TION The operations of the components in the operation range of cooling amp drying are as follows Operation range Heating M Functional component operation Instruction frequency 40 20 HZ 5th speed 2nd speed 2nd speed Ist speed OFF 4 way valve OFF indoor OFF F indoor continuous instructions 0 continuous instructions 1 e During the heating operation the protection functions of defrosting operation and high pressure control are effective This is also the case for usual heating operation e If during the operation of this control range the set temperature TP change signal is received and the heating operation of heating amp drying is changed immediately TION judgment will be conducted For other operations it operates in the range before temperature confirmation every 5 minutes and in the new range after judgment When a range other than Range O is switched to Range 0 the control is as follows A According to the Stop mode B Prevent Range O in jiggle operation from changing to Range L operati
58. erant gas leakage during installation servicing be sure to provide sufficient ventilation If the refrigerant gas is exposed to fire poisonous gas may be produced 3 Prevent air or vapor from entering the refrigerant cycle when installing or removing air conditioners Otherwise the pressure in the refrigerant cycle may become exceptionally high which will cause fracture of equipment or personal injury 4 After the installation is completed check that there is no refrigerant gas leakage If the refrigerant gas is leaked to the room and comes into contact with the fire in the fan driven heater small heating stove etc it may produce poisonous gas 5 If an air conditioner charged with large amount of refrigerant such as a multi functional air conditioner is installed in a small room be sure to take more care and ensure that the concentration will not exceed the limit even in case of refrigerant leakage In case the refrigerant is leaked and its concentration exceeds the limit oxygen starvation may be caused 6 Be sure to conduct installation or removal according to the Installation Manual Incorrect installation may cause failure of refrigerant water leakage electric shocks fire etc 7 Unauthorized operation of air conditioners may be very dangerous In case of failure of the machine please call the qualified air conditioner technician or electrician Incorrect servicing may cause water leakage electric shocks fire etc 7
59. eration Actions type Short circuit Wire break Heat Usual operation of system is Usual operation of system is Cooling exchanger possible possible liquid pipe The defrosting does not 10 min defrosting about once Heating sensor function an hour Outdoor air Cooling Usual operation of system is Usual operation of system is m possible possible P The defrosting does not 10 min defrosting about once sensor Heating function an hour Compressor Compressor over heat The compressor stops The vent pipe All modes protection is impossible The inverter does not output sensor unit can run 52 9 Check method for indoor electrical components Is the fuse 3 15A intact No gt Replace the fuse Has voltage been applied to between terminal block 1 2 AC220 230 240V Replace the PCB Dose the voltage between terminal block 2 3 fluctuate between DC 0 12V Replace the PCB Notes 1 Communication is sent only when 52C is ON so please check the Yes operation status 2 Measure voltage on the terminal block e Power supply Between AC220 230 240 e Signal Between 2 Fluctuates between DC 0 about 12V normal 3 Press and hold the back up switch for over 5 sec to enter the HI POWER cooling mode 10 Check method for indoor fan motor AC motor Method for checking whether the fan motor or the circuit board malfunctions when the indoor fan motor is abnor
60. etimes lead to serious accidents These are very important precautions for safety Be sure to observe all of them without fail For qualified installing personnel take precautions in respect to themselves by using suitable protective clothing groves etc and then perform the installation works Please pay attention not to fall down the tools etc when installing the unit at the high position f unusual noise can be heard during operation consult the local dealer Be sure to confirm no anomaly on the equipment by commissioning after completed installation and explain the operating methods as well as the maintenance methods of this equipment to the user according to the owner s manual Symbols which appear frequently in the text have the following meaning Provide proper earthing Strictly prohibited Observe instructions Keep the installation manual together with owner s manual at a place where any user can read Moreover if necessary ask to hand them to a new user WARNING Installation must be carried out by the qualified installer and only the specified optional components should be used If you install the system by yourself it may cause serious trouble such as water leaks electric shocks fire and personal injury as a result of a system malfunction nstall the system in full accordance with the instruction manual Incorrect installation may cause bursts personal injury water leaks electric shocks and fir
61. flare nuts and tools for R410A Using conventional parts for R22 can cause the unit failure and serious accidents due to burst of the refrigerant circuit Tighten the flare nut by torque wrench with specified method If the flare nut were tightened with excess torque this may cause burst and refrigerant leakage after a long period 23 Do not open the operation valves for liquid line and gas line until completed refrigerant piping work air tightness test and evacuation If the compressor is operated when operation valves are open before the connection of refrigerant piping work is completed it can cause frostbite or injury due to rapid refrigerant leakage and burst or personal injury due to anomalously high pressure in the refrigerant circuit into which air is sucked The electrical installation must be carried out by the qualified electrician in accordance with the norm for electrical work and national wiring regulation and the system must be connected to the dedicated circuit Power supply with insufficient capacity and incorrect function done by improper work can cause electric shocks and fire Be sure to shut off the power before starting electrical work Failure to shut off the power can cause electric shocks unit failure or incorrect function of equipment Be sure to use the cables conformed to safety standard and cable ampacity for power distribution work Unconformable cables can cause e
62. ger sensor Insufficient refrigerant Defective vent pipe sensor Disconnecting valve closed 42 Conditions Stops in the overload 1 mode during cooling operation Stops in the overload 1 mode during heating operation Stops in the overload 2 mode during cooling operation Stops in the overload 2 mode during heating operation Stops in the overload 3 mode during cooling operation Stops in the overload 3 mode during heating operation The outdoor unit can t correctly detect signals from the indoor unit for 1 min and 55 sec continuously After the power is switched on the indoor unit can t correctly detect signals from the outdoor unit for 10 sec continuously The indoor unit can t correctly detect signals from the outdoor unit for 1 min and 55 sec continuously The compressor after starting stops after the rotor is locked when the rotational frequency is below 16 rps Stops after the rotor is locked when the rotational frequency is above 16 rps The cause of final failure is rotor locked after the compressor fails to start after 42 continuous attempts The cause of final failure is rotor locked after the compressor fails to start after 42 continuous attempts The cause of final failure is rotor locked after the compressor fails to start after 42 continuous attempts The cause of final failure is rotor locked after the compressor fails to start after 42 continuous attempts When the air co
63. h the appliance may vary 2895 6 MAINTENANCE 6 1 Electrical parts failure diagnosis method 1 Precautions Be sure to switch off the power before disassembling and checking air conditioner Maintenance of the indoor unit should commence 1 minute after the power is switched off With respect to maintenance of the outdoor unit the major circuit electrolytic capacitor which may be charged should be fully discharged before the maintenance When removing the circuit board do not vigorously press the circuit board or the bonded parts 3 When unplugging the plug connector do not drag the electric wire and be sure to hold the plug frame 2 Matters to be confirmed before diagnosis Have you asked the user about the details of the failure Does the air conditioner run Does the self diagnosis have any indication Is the voltage of the power socket correct 4 Is the connection between the indoor and outdoor units wrong Is the outdoor refrigerant disconnecting valve opened 3 Procedure of diagnosis when the air conditioner can t run at all When the air conditioner runs but malfunctions follow the procedure described in 4 Important The air conditioner does not run at all when all of the following are met The RUN lamp does not light up The flap does not open 3 The motor of the indoor fan does not rotate The self diagnosis does not have indication 238 Procedure of diagnosis
64. he lubricant and failure of the compressor Table 9 Tightening torque for flaring for R410A reference values Ratin Outside diameter Ti ghtening torque Tightening torque of torque wrench available 2m N m kgf cm on the market N m kgf cm 14 18 140 180 16 160 18 180 33 42 330 420 42 420 7 2 3 Storage of piping materials 1 Types and storage of piping materials The refrigerant piping materials for air conditioners are generally divided into the following types oo Common name With thermal materials Flared a Pipe sleeve x Without thermal Not flared b Insulated pipe insulation Not flared c Bare copper pipe Bare copper pipe The pressure of R410A is higher than that of R22 by about 1 6 times so be sure to use copper pipes of the thickness as shown in Table 3 see Page 56 and try to keep them clean Be careful in handling storing copper pipes to avoid bending distorting or damaging them Be careful to prevent dust water etc from entering the pipes Seal the pipe opening with caps etc Ensure the sealing is intact during storage To store coated or bare copper pipes use clamps tape etc to fully seal the opening 65 2 Characteristics a Pipe sleeve Copper pipes as R410A pipe sleeves must have a thickness as shown in Table 3 see Page 59 and Tables 5 and 6 see Page 61 and sizes of flaring and flare nuts different from those of R22 Therefore be s
65. he opening port if the room enters the negative pressure state due to the aerator for the high rise apartment etc Install isolator or disconnect switch on the power supply wiring in accordance with the local codes and regulations Locations at high altitude more than 1000m high Locations with ammonic atmospheres Locations where heat radiation from other heat source can affect the unit Locations without good air circulation Locations with any obstacles which can prevent inlet and outlet air of the unit Locations where short circuit of air can occur in case of multiple units installation Locations where strong air blows against the vent of outdoor unit It can cause remarkable decrease in performance corrosion and damage of components malfunction and fire CAUTION Do not install the outdoor unit in the locations listed below Locations where discharged hot air or operating sound of the outdoor unit can bother neighborhood Locations where outlet air of the outdoor unit blows directly to animals or plants The outlet air may cause adverse impact on plants etc Locations where vibration and operation sound generated by the outdoor unit can affect seriously on the wall or at the place near bed room Locations where vibration can be amplified and transmitted due to insufficient strength of structure Locations where an equipment affected by high harmonics is placed TV set or
66. he same type of lubricant 7 3 5 Refitting equipment Do not charge the air conditioner which used the conventional refrigerant R22 with the alternative refrigerant R410A Otherwise the equipment may malfunction or such severe consequences as interruption of refrigerant cycle etc 72 7 3 6 Recharging refrigerant in servicing If it is necessary to charge refrigerant charge the specified amount of refrigerant by following these steps For details see the operation manual prepared by the equipment manufacturer 1 Connect the charge hose to the service opening of the outdoor unit 2 Connect the charge hose to the vacuum pump adapter Here push the control valve to the full open position 3 Push Handle Lo to the full open position ON and turn on the power switch of the vacuum pump For the time of evacuation see the manual of the equipment manufacturer 4 When the pointer of the compound pressure gauge indicates 0 1 MPa 76cmHg push Handle Lo to the full close position and turn off the power switch of the vacuum pump Keep the status for 1 2 minutes and ensure the pointer of the compound pressure gauge has not turned back 5 According to the steps described in 7 3 2 2 Pages 119 120 use the electronic loadcell scale to charge liquid refrigerant 7 4 Refrigerant recovery 7 4 1 Recovery procedure The following is the general procedure for recovering refrigerant The recovery procedure varies depending on the type
67. ic 3 folded Spiral hydrophilic 20 section 16 section 2 row 452 fin 1 4 2 row 1221 fin 2 1 circuit circuit Pf1 4 Child heat exchanger Spiral hydrophilic 1 row 4 section 408 fin THACOM RM B5077MDE2 527W DC frequency conversion compressor insulation grade E machine oil a cl controller Refrigerant g R 410A 900g addition reduction not needed within the use range of 15m Operating MPa Max 4 15 Min 1 47 pressure limit Air filter Mould proof air filter Accessories and Indoor unit 1 mounting plate 1 tapping screw 5 battery 2 use and quantity installation manual 1 remote controller 1 outdoor unit 1 Drain elbow 1 Water shutoff plug 1 AMEN Wireless remote controller electronic thermostat controlling room devices temperature microcomputer controlling defrosting ee Serial signal protection fan error protection compressor over heat protection high voltage protection over current protection etc The nominal values of Noise in cool room and Noise in warm room in the above table are tested in a dead room Energy efficiency ratio 343 36 Energy efficiency grade Note 1 The data are measured at the following conditions The pipe length is 5m Indoor air temperature Outdoor air temperature Operation Cooling Low temperature Heating 20 2 The operation data are applied to the 220Vdistricts respectively 3 The
68. imes Insufficient refrigerant Defective vent pipe sensor Disconnecting valve closed Wire break of outdoor heat exchanger liquid pipe sensor Poor joint connection Wire break of external temperature sensor poor joint contacting Wire break of vent pipe sensor poor joint contacting Loek of compressor output missing phase of compressor short circuit of wiring of compressor Defective outdoor circuit board Defective EEV Disconnecting valve closed Damage of mains transformer wiring break of compressor wire break of vent pipe sensor poor joint contacting disconnecting valve closed insufficient refrigerant defective EEV Defective compressor output missing phase of compressor wiring break of compressor defective circuit board of outdoor unit When the value of vent pipe sensor exceeds the setting The air conditioner stops The operation stops and the wire break of the outdoor heat exchanger sensor is detected wire break is determined when it is detected within 15 sec at a temperature of below 50 C No indication during operation The operation stops and the wire break of the outdoor heat exchanger sensor is detected wire break is determined when it is detected within 15 sec at a temperature of below 40 C No indication during operation After the rotational frequency of over 0 rps of outdoor unit lasts for 9 minutes the temperature measured by the vent pipe sensor of compressor is lt 7 C for more tha
69. ing ot Swing Stops here for 3 min and 50 sec R The flap moves repeatedly as The flap moves repeatedly as shown in the above figure shown in the above figure e In the HEAT mode when the climator thermostat functions or the DRY operation is in progress it becomes horizontal automatically 2 Non operating period When the machine stops the flap fully closes b Flap memorizing function As this angle is memorized in the microcomputer the flap will automatically operate at the angle next time the machine is started c Swing As shown in the figure below the flap swings upward downward and to the left right continuously 13 4 5 Comfort timer setting If in the COOL or HEAT mode or Automatic COOL or HEAT mode the timer is set to ON the Comfort Timer functions The initial value is 15 minutes The start time for next operation is determined according to the relationship between the room temperature sensor at the time of setting and the set temperature max 60 minutes Operating Correction value at the start of operation minute mode COOL 3 lt room temperature 1 lt room temperature room temperature set set temperature set temperature lt 3 temperature lt 1 HEAT 3 lt room temperature 2 lt room temperature room temperature set Notes 1 The room temp sensor Thl commences operation 5 minutes before the timer is ON regardless of the temperatur
70. ions If there is no voltage output it indicates the circuit board malfunctions and the fan motor is basically normal Note 1 After the one time output another 30 seconds after the contact pin of the plug outputs voltage for 3 minutes the error of the indoor unit is detected DC280V 230V 31 OV o DC several V S GND Circuit board of P N outdoor unit Red Black White Yellow Blue J 1 1 n xX J 1 11 Checking resistance of DC fan motor Measure the resistance between the terminals with a multimeter Measurement point Resistance value in Notes 1 Remove the fan motor and normal cases measure without power 2 The fan motor is abnormal if the red and Above 25MQ measurement is below the normal value black Above 30MQ white and black 59 6 2 Servicing 1 Evacuation Evacuation refers to the process of purging non condensable gas air water etc from the refrigerant equipment with a vacuum pump The R410A refrigerant is highly water insoluble therefore even a little water left in the refrigerant equipment will be frozen which causes the so called water blockage The refrigeration oil of the compressor is esterification oil or synoil which has strong hygroscopicity so deposit may be formed easily when foreign matters enter which causes many inexplicable faults e
71. ith good ventilation b Compositional variation property of false azeotropic point R410A is a kind of false azeotropic mixture refrigerant composed of R32 and R125 The false azeotropic condition refers to the dew point curve and the boiling point curve gas liquid balanced curve constant pressure are located at each other s peak respectively Multi component refrigerant with this chemical property will not change in ingredients basically even when its state is changed such as becoming vapor or condensation Therefore even in case of gas refrigerant leakage at a position during pipe mounting the ingredients of the circulating refrigerant will keep unchanged basically Therefore R410A can basically be disposed of as a single component refrigerant similar to R22 However with respect to the charging of R410A in consideration of the little changes in ingredients during the conversion from gaseous to liquid state when it is put into the cylinder it should be charged in liquid state C Property of pressure As shown in Table 2 the vapor pressure of R410A is higher than that of R22 by 1 6 times at the same temperature so be sure to use the tools and materials designed specifically for R410A that can bear high pressure for installation and servicing Table 1 Comparison of thermo physical property between Table 2 Comparison of pressure of R410A and R22 saturated vapor between R410A and R22 Unit MPa R410A R410A 7 wt R22 R12
72. l severely damage the circuit Therefore keep the appropriate welding temperature and try to reduce the heating area during welding 3 Over heat protection In order to prevent damaging or downgrading the components near the welding position due to over heat please take appropriate protection measures such as using 1 a metal plate 2 wet cloth or 3 heat absorbent Movement during welding Avoid any vibration during welding to prevent breaking or damaging the welded splice Oxidation prevention In order to improve the efficiency of welding several types of antioxidant available on the market may be used However the ingredients of such antioxidant may differ in thousands Ways and some may erode the piping materials or have negative impact on HFC refrigerants lubricants etc Therefore be especially careful in the use of antioxidants 7 3 Installation Removal and Servicing 7 3 1 Tools for R410A For air conditioners using R410A in order to prevent charging other types of refrigerant accidently the diameter of the service opening of the control valve 3 way valve for the outdoor unit is changed In addition in order to improve the compressive strength the sizes of flaring and flare nut for copper pipes the rating diameters are 1 2 and 5 8 are also changed Therefore prepare the tools designed specifically for RA10A as shown in 1 on Page 117 and the general tools as shown in 2 on Page 118 for installation servicing 6
73. lectric leak anomalous heat production or fire This appliance must be connected to main power supply by means of a circuit breaker or switch fuse 16A with a contact separation of at least 3mm If the appliance has a plug the plug must comply with IEC 60884 1 Use the prescribed cables for electrical connection tighten the cables securely in terminal block and relieve the cables correctly to prevent overloading the terminal block Loose connections or cable mountings anomalous heat production or fire Arrange the wiring in the control box so that it cannot be pushed up further into the box Install the case and service panel correctly Incorrect installation may result in overheating and fire Be sure to mount the service panel Incorrect mounting can cause electric shocks or fire due to intrusion of dust or water Be sure to switch off the power supply before installation inspection or servicing If the power supply is not shut off there is a risk of electric shocks unit failure or personal injury due to the unexpected start of fan can cause WARNING To recover refrigerant stop the compressor before closing the valve and disconnecting the refrigerant piping If the refrigerant piping is disconnected before the compressor stops and when the service valve is opened it can cause frostbite or injury due to rapid refrigerant leakage and burst or personal injury due to anomalously high pressure in
74. ll not start operating for approximately 3minutes This is to protect the unit and it is not a malfunction Three minute restart preventive timer 5 5 Precautions for wireless remote controller operation 1 Effective distance of wireless remote controller Receiver 0 5 1m we Wireless remote Remote control is m controller 5 mor less possible within this range 60 or less asm n5m 2 Precautions The remote controller should be correctly facing the receiver of the air conditioner for manipulation The typical coverage is indicated in the left illustration It may be increased or decreased depending on the installation The coverage may be decreased or even nil if the receiver is exposed to strong light such as direct sunlight illumination etc or covered by dust or used behind a curtain etc 31 5 6 Standard running data Les seas Lew Temp difference between inlet Cooling Heating 9 16 10 21 and outlet air of indoor unit C Operating current A 1 4 3 5 1 3 5 3 1 7 4 6 1 6 6 5 Notes The above data complies with the standard and is measured at the following ambient temperature indoor side cooling 27 CDB 19 C WB heating 20 CDB outdoor side cooling 35 CDB 24 CWB heating 7 CDB 6 CWB The length of the pipe between the indoor and outdoor units is 5 meters in the test The length of the pipe supplied wit
75. low stop Air flow Power Save Set temperature Air direction 4 After automatic restart due to power cut the following settings will be canceled Timing operation HI POWER operation CLEAN operation 5 Priority of start Compressor 3 min delayed start control gt Automatic restart due to power cut 4 4 Flap control 1 Swing of vertical flap SM1 The vertical flap continuously swings upward and downward Set the angle and pulse count 0 for horizontal 8 73 J 70 65 607 55 50 45 OF Pulsecount 0 57 114 171 228 284 341 398 SM1 Note Max control range 1274 pulse 2 Non operating period When the machine stops the vertical flap fully closes 12 3 Flap memorizing function where the vertical or horizontal flap stops When you press the AIR FLOW Up Down or Left Right button the flap will operate at the angle set As this angle is memorized in the microcomputer the flap will automatically operate at the same angle next time the machine is started Recommended angle of flap HEAT COOL DRY Slant forward blowing owing _ 4 Flap control The flap is controlled with the FLAP button on the remote controller a Automatic direction The flap is automatically set to the best air flow angle in an operating mode 1 Start time of operation COOL and DRY operation HEAT operation 4 Stops here for 1 minute Sw
76. mal 1 Output check of indoor PCB A Unplug the wire from the power socket B Remove the panel and the cable socket for the fan motor C Plug the cable into the power supply and press the ON OFF button the machine runs and the voltage shown in the figure below outputs for about 30 sec if the error is detected it indicates that the circuit board is basically normal and the fan motor malfunctions If there is no voltage as shown in the figure below between 3 and 9 of contact pins CNU of the socket it indicates that the indoor circuit board malfunctions and the fan motor is basically normal 220V CPU AN Return signal 5V d b MM in zu A h m P P M A A m P Pe 2 v P F FM 2 Check of resistance value of AC fan motor Resistance value in Notes 1 Remove the fan motor and measure normal cases without power 2 The fan motor is abnormal if the white measurement is below the normal brown and value red 53 11 Remote controller failure diagnosis procedure Note 1 Is the remote controller normal after reset el ow battery of remote controller Defective remote controller 5 Replace Restart Note 1 Does the air conditioner operate Yes RS No error Can the air conditioner operate when the back up Switch is used No Defective PCB of indoor u
77. mp Indicates set air flow rate with lamp Display the swaying way of the wind guide blade HI POWER ECONOM Y indicator Display in the HI POWER ECONOMY operation mode respectively 11 4 2 Emergency ON OFF button back up switch When the battery of the remote controller runs out or the remote controller is lost or malfunctioning this switch can be used to turn the unit on and off 1 Operation method Press the switch once to place the unit in the AUTO mode Push it once more to turn the unit off 2 Detail of operation The system operates in the COOL DRY or HEAT mode according to the room temperature temperature at the temperature detection point Note To repair or move the machine push and hold the switch for more than 5 seconds to set to the cooling mode automatically Set temperature Fan speed Flap Operating mode COOL About 24 C About 24 C Automatic Automatic About 26 C Timer conversion Continuous Emergency ON OFF button on the equipment 4 3 Automatic restart due to power cut 1 This function can rapidly record the operation state immediately before the air conditioner is switched off due to power failure and will resume operation automatically after the power supply is restored 2 This function is set to Active by default 3 Operation state memorized immediately before power cut includes e Indoor operation switching cool room warm room drying automatic air f
78. n t be adjusted during the HI POWER operation 2 Priority is given to actuation of protective device even during the HI POWER operation 4 7 Outline of cooling operation 1 Operation of functional components E LN Functional component other than 0 abnormal stop Indication Light up or flash 52C rela OFFinStopmode ON Outdoor fan motor Depending on Stop mode ON Depending on Stop mode 4 way valve OFF Indoor continuous instructions 0 EEV Depending on Stop mode Depending on EEV Depending on Stop mode control 2 Air flow switching a The inverter instruction frequency changes within the range of selected air flow Ab RE SRK25QA S SRK35QA S AUTO Frequenc 20 92 rps 20 106 rps Air flow Corresponding to frequenc Frequenc 20 92 rps 20 106 rps Air flow Frequenc 20 55 rps 20 66 rps Air flow LO Frequenc 20 34 rps 20 38 rps Air flow 2nd speed b When the protection device is actuated operation is performed in the corresponding mode c Outdoor fan operates in accordance with the instruction frequency 3 Details of control in each operating mode a Fuzzy operation Deviation between the room temperature setting compensation value and the suction air temperature is calculated in accordance with the fuzzy rule and used for control of the air flow and the inverter frequency b Cooling constant temperature operation Operating conditions If the frequency obtained with
79. n 15 sec The air conditioner stops When the compressor is started and the output current of the inverter current of compressor motor exceeds the setting The air conditioner stops The outdoor unit stops due to abnormal cause or the input current is lower than the setting for 3 min The air conditioner stops The position of magnetic pole of the compressor motor can t be correctly detected when the compressor is started The air conditioner stops Note 1 It can t be started with the remote controller 3 minutes after abnormal stop The abnormal stop disappears when the power of the air conditioner is switched off 36 6 Service mode failure mode reading function The air conditioner records the past error indication and protection stops service data If the indication of self diagnosis can t be confirmed it can be confirmed through service data to grasp the condition when the error occurs a Terms Service mode Service mode refers to indicating service data with the lamp on the display board through the operation of the indoor controller described in b Service data Refers to the content of past error indication and protection stops of the air conditioner The controller of the indoor unit uses nonvolatile memory the data stored will not disappear even after the power is cut to memorize the past error indication and protection stops of the air conditioner Service data is composed of self diag
80. n be connected to the rear left left rear bottom left ounting pipe support right or bottom right 1 Removing the Connecting the pipe to the left Connecting the pipe to the right M Steps for drainage pipe Connecting the pipe to the left Connecting the pipe to the displacement crm rear right rear N s E ji Pipe Connecting the pipe to the left Connecting the pipe to the right Penmaes pipe Insulation tape winding o Hold the root segment of 2 Removing the drain cover Securing the indoor unit e the pipe pull out the pipe and shape the extended section o Remove it by hand or with pliers I Turn the drainage pipe to remove it Wall Wind the section extending to outdoor with exterior insulation tape Be sure to wind the wiring and the piping together with exterior insulation tape To apply the exterior insulation tape be sure to begin from the lower part of the piping to avoid Pull the pipe 1 LATA Q Gently push the lower section and secure the unit e How to remove the indoor unit from the mounting plate D Push the lower latch on the base of the indoor unit Mounting plate Lower latch on base of indoor unit Mounting steps f Latches 2 The alr cai p Drain pan Dranainitinna 28 Drainage pipe Mount the drainage pipe at a downward angle Caution After all mounting ste
81. n by short circuiting protective device of pressure switch and temperature controller or the use of non specified component can cause fire or burst lightning conductor or telephone line s ground lead Incorrect grounding can cause unit faults such as electric shocks due to short circuiting Never connect the ground lead to the gas line as gas leakage can cause explosion or fire CAUTION Use the circuit breaker with correct breaking capacity at all electrodes If a wrong breaker is used it can cause the unit malfunction and fire Earth leakage breaker must be installed If the earth leakage breaker is not installed it can cause fire or electric shocks Secure a space for installation inspection and maintenance specified in the manual Insufficient space can result in accident such as personal injury due to falling from the installation place After maintenance all wiring wiring ties and the like should be returned to their original state and wiring route and the necessary clearance from all metal parts should be secured Take care when carrying the unit by hand If the unit weighs more than 20kg it must be carried by two or more persons Do not carry by the plastic straps always use the carry handle when carrying the unit by hand Use gloves to minimize the risk of cuts by the aluminum fins Do not install the unit in the locations listed below Locations where carbon fiber metal powder or any powde
82. nditioner is operating and the indoor fan motor is ON the rotational frequency of the indoor fan motor is below 300 rps for over 30sec After the outdoor rotational frequency is 0 rps for 9 minutes continuously the discharge pipe sensor data sends wire break signals for over 15 sec below 7 C The temperature is below 20 C for 40 min continuously during heating operation The compressor stops The temperature is below 50 C for 40 min continuously during heating operation The compressor stops The condensation prevention control operates During cooling operation the condensation prevention control operates and the compressor stops During heating operation the high pressure control operates and the compressor stops The over heat protection control of the compressor operates and the compressor stops Automatic restoration Error indication The value of vent pipe sensor exceeds the setting twice 4 times Cooling cycle Disconnecting valve closed The cooling cycle system protection system Insufficient refrigerant control operates protection control 43 Notes 1 The number of flashes in service mode excludes the 1 5 sec light up beginning signal See the following example e Safe current heating safety I for example the stop code is 32 RUN lamp tens place flashes 3 times and TIMER lamp ones place flashes 2 times 3x 10 2x 1 32 The code 32 Safe c
83. nit Yes Replace the wireless receiving part Yes ves Defective wireless receiving part Can the air conditioner operate when the remote controller is used Defective remote controller gt Replace 54 a Press the ACL switch on the remote controller b If the set temperature displayed is 0 C and the current time displayed is 12 00 it Indicates there are no obvious problems DP BE 08 0 5 12 Check method for outdoor unit 1 Circuit diagram of 25QA S outdoor unit 9NICNIM AX KW SATYA Ada HAVASIGA ALANIK S AALAY AIdd s 4 HHI 440 110 OL TAAN 2 1 21 8 ONIOVIdHH AL VOE HHL NI H9VIT TOA HOIH SI SHSHL NOLINSIIV 3OVITOA WIH WY AGIT ASTOG WAYA HHL IIDnOHIO TOHINOO 80 SH VLTDA HHL ONA NO BOSSHEdROO AD SOVI K MA HHI DNILOGLLHII NOISWHANO AONANDERLI JO HHI 8 TAM ONIAJIIOHNH XC 0877 ATddNS 3H amp Dd 2 ONIAJIIOHM INANI OV ATdANS 3HROd I AVOA HHI NO SOWWHdAL OL OL NV SINIOMLSAL SNIGONIA AI MOTION SV SDVITOA dO SINIOJLSAL AROS SIHL NI SOWI RA KALKI OL INVE SITIO HHI 440 HdVHOS OL NOA OS quvod SNLINDWHd HHI AYE 5 ONIUVAKS HSnV HS TOEINOS OINOUIDTTA NI
84. nosis data and stop data Self diagnosis data Refers to the indication data of causes of past stops of the indoor unit self diagnosis indication Data of last 5 times can be memorized and the older data is deleted automatically It also includes the temperatures measured by the various sensors room temperature indoor heat exchanger outdoor liquid pipe and outdoor temperature discharge pipe sensors and information of the remote controller operation switching and air flow changes More detailed data can be confirmed Stop data Data of causes of past stops due to protection control etc in the air conditioner If only stop data is indicated the system will be restored automatically The indication will be restored automatically after the appliance enters the stop mode normally Data of last 10 times can be memorized and the older data is deleted automatically Important If only stop data is indicated the air conditioner is normal However when the same protection repeats more than 3 times it will become the cause of user s complaint b Indication sequence of service modes Temporarily switch off the power and wait over one minute Press and hold the back up switch and insert the cable into the socket If the buzzer does not sound after several operations the back up switch may be defective Pd Does the buzzer on the NS indoor unit sound 2 The settings of the remote controller are
85. nt contacting lt E No Is the joint contacting normal gt Correct the plug socket replace the joint Yes Is the resistance value of the sensor No norma Replace the sensor _ 1 Yes Replace the PCB e List of temperatures and resistance properties of sensors lt Temperature of vent pipe of outdoor compressor gt Temp C Resistance KQ Temp C Resistance KQ 0 164 5 127 75 O 99 Curve and table of temperatures and resistance properties of sensor lt Room temperature sensor heat exchanger indoor and outdoor sensors and outdoor air temp sensor gt Temp CC Temp CC Fa RH o 15 37 10 28 um IN gt To 0 0 20 2 60 7 40 Temp C 49 Error of outdoor unit Damage of power transistor wiring break of compressor Failure of inverter No Yes Check the compressor Compressor over heat Insufficient refrigerant failure of dischar discharge pipe sensor normal correct check the resistance value replace For details see P43 Yes Is the refrigerant circulating load Is the situation the same after No Insufficient normal gt refrigerant is charged refrigerant Yes Yes the discharge pipe sensor Is the resistance value of the Yes Check that the connection of the connector is No Failure of inverter Blo
86. of refrigerant recovery device The connection and disposal methods for different types of refrigerant recovery device may be different Therefore see the user s manual etc of the various equipment to learn the detailed operation information 1 Check before the recovery procedure a Check the refrigerant recovery device CD Gas leakage Servicing is required when there is any failure extractor for discharging residual oil 3 Weighing function excessive charging prevention function floating switch moisture indicator dryer and other ancillary functions of the recovery device to be adjusted or replaced when necessary Circuit b Check the accessories to the refrigerant recovery device 2 Preparation for the recovery procedure a Installing the refrigerant recovery device The device should be installed in the place meeting the following requirements as far as possible Ambient temperature above 0 C and below 40 C Flat dry floor A position as near the air conditioner as possible b Preparing a recovery cylinder Use a compliant recovery cylinder suitable for recovering refrigerant c Connecting to the power supply d Preparing the air conditioner for refrigerant recovery CD If the air conditioner from which refrigerant is to be recovered can operate evacuate the appliance to store the refrigerant in the outdoor unit condenser side e Evacuate the air conditioner after confirming the specifications
87. on eRange O operation is the same as Range I operation of cooling amp drying No heat retaining is conducted during heating operation 20 4 9 Outline of automatic operation 1 Determination of operating mode After the indoor and outdoor fans operate at the 2nd sped and 3rd speed respectively for 20 seconds the system checks the room temperature and outdoor air temperature to determine the operating mode and the room temperature setting compensation value and then enters the automatic operation 27 5 25 5 Room temperature 19 5 10 30 Outdoor temperature 2 The unit checks the temperature every hour after the start of operation and if the result of check is not the same as the previous operating mode it will change the operating mode 3 When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is selected during heating cooling or drying operation the unit will operate in the original operating mode 4 Set temperature can be adjusted within the following range There is the relationship as shown below between the signals of the wireless remote controller and the set temperature Signals of wireless remote controller indication _ 6 5 4 2 0 4 6 Set temp Drying 18 19 20 21 22 23 24 25 26 27 28 29 30 4 10 Economical operation ECONO button on remote controller ON
88. otor Compressor lock Failure of compressor failure of outdoor PCB Visually inspect wiring of compressor Check insulating resistor above 1MQ zs Correct the connector AN Failure of inverter Is the Has all three phase output Check the Check winding coil resistor about several Q compressor In normal cases the compressor is locked 51 Outdoor fan motor error Failure of fan motor failure of outdoor PCB Pai N S Is the connection of the connector lt normal 2 fe Correct the connector VA Yes Has voltage been applied to fan bu No 4 motor gt gt Failure of outdoor PCB Yes Failure of fan motor 8 Actions in case of short circuit and wire break of sensor a Indoor unit Sensor Operation Actions type Short circuit Wire break Room Become the compressor No compressor operation temp continuous operation instruction obtained sensor instruction No compressor operation Become the compressor Heating instruction obtained continuous operation instruction Heat Usual operation of system is No compressor operation exchanger Cooling possible instruction obtained frost sensor prevention Heatin High pressure control mode Heat retaining stop of indoor 5 inverter stop instruction fan Humidity in the table below in the table below sensor Usual operation of system is possible b Outdoor unit Op
89. p due to protection control etc stop code 28 C Indicates the cause of eighth last stop due to protection control etc stop code 29 C Indicates the cause of ninth to last stop due to protection control etc stop code Indicates the cause of tenth to last stop due to protection control etc stop code 39 c List of error codes and stop codes for all models No of flashes in Content of PE Error Automatic 2 Cause Conditions ean service mode Stop failure indication restoration code or error 0 Noma _ Flash 1 11 Power cut Start of Compressor lock The cause of final failure is power cut after time compressor Short circuit of compressor wiring the compressor fails to start after 42 program Output missing phase of compressor continuous attempts twice Defective circuit board of outdoor unit as 12 Below 20 rps Disconnecting valve closed The compressor after starting stops after imes Output missing phase of compressor power cut as the rotational frequency is Defective EEV below 20 rps 13 Over 20 rps Disconnecting valve closed Stops after power cut when the rotational Output missing phase of compressor frequency is above 20 rps Defective compressor Defective EEV EE Rll Sr times DC350V Error of power supply Flash 5 15 Short circuit of Defective circuit board of outdoor unit Failure of power transistor is determined times power Damage of mains transformer when the compressor starts
90. pipe and joint Inside diameter of Minimum depth of Gap outer pipe penetration A D x 1 2 When inserting the pipe either process the end of the pipe or connect the pipe with a sleeve joint through welding 2 Brazing filler a Alloy brazing filler Alloy mainly composed of silver and copper is used to bond iron copper or copper alloy In spite of its outstanding solderability it s expensive b Phosphor bronze brazing filler Phosphor bronze brazing filler is generally used to bond copper or copper alloy c Low melting temperature solder Alloy of tin and lead Conventional solder Due to its weak adhesive strength it can t be used for refrigerant pipe welding Notes 1 BCuP reacts with sulfur easily and produces a complex aqueous solution which may cause gas leakage Therefore use other types of brazing filler for SPA etc and apply paint on pipe surface 2 If welding is needed during servicing please use the same type of brazing filler 66 3 Welding flux a Reasons for using welding flux To remove the oxide film and impurity from metal surface to help the flow of brazing filler e To prevent oxidization on metal surface in welding To reduce the surface tension of brazing filler to make it better adhere to the treated metal b Features of welding flux required e The active temperature and welding temperature of the welding flux are the same Due to the wide range of effective temperature the
91. ps check whether the drain is proper Otherwise water leakage may occur y Odor Avoid following drainage pipe connections i 5 from sink A End of drainage pipe Higher than as required al i Undulating Less than 5cm away End of M Pour the water into the drain pan under the heat from ground pipe in sink exchanger and ensure the water is drained to Shielded plate outdoor tube o When the extended drainage pipe is in the room be 7 Tm sure to use a shielded plate tube to be mounted by Whence i posed in 4 the user to ensure thermal insulation Drainage pipe Extended drainage pipe 5 3 Installation of outdoor unit Make sure that the unit is stable in installation Fix the unit to stable base When installing the unit at higher place or where it could be toppled by strong winds secure the unit firmly with foundation bolts wire etc Perform wiring making wire terminal numbers conform to terminal numbers of indoor unit Indoor gutdoor connecting wire terminal block o Connect using ground screw located near qum mark o Never install the water elbow when the Ethylene 8 Water elbow _ ylene hose temperature is below O C for several days in a Ethylene hose available on the Ground water market TOW preventing For heat pump type only piston 5 4 Pipe connection Preparation
92. r e Suitable for RA10A R410A or release e With a floater in it to recovery gas at the vertical prevent overcharge eTurn it to pour out position liquid R410A e Easy to maintain Figure8 Types of cylinder e Note Laws prohibit recovery of R410A into discarded cylinders or one way cylinders 2 Dryer A desiccant container used to remove water from R410A e The dryer should be used as supplies e Before the installation keep the dryer sealed e Used to protect the R410A recovery device 3 Connection hose a Charging port and charging port sealing ring e It is generally sold separately from the refrigerant cylinder e The use of a two port cylinder which may have special diameter should be confirmed by the manufacturer e Sealing rings are supplies Charging port 74 b Charge hose pressure resistant fluorocarbon hose and sealing ring Thickness 1 48 multiple lengths available e Hose with the pressure resistance property higher than 5 2MPa 52kg cm G In general only one end has fixture Hose 4 Manifold pressure gauge The most important servicing tool for coolers and air conditioners It is widely used to check gas pressure when R410A is being charged recovered Compound Pressure gauge pressure gauge Manifold _ pressure gauge Disconnecting valve 5 Conduit needle valve a To recover R410A from the equipment without gas charging or recovery port use the tool to drill a hole in
93. r is floating Locations where any substances that can affect the unit such as sulphide gas chloride gas acid and alkaline can occur Vehicles and ships Locations where cosmetic or special sprays are often used Locations with direct exposure to oil mist and steam such as kitchen and machine plant Locations where any machines which generate high frequency harmonics Locations with salty atmospheres such as coastlines Locations with heavy snow Locations where the unit is exposed to chimney smoke 24 Dispose of any packing materials correctly Any remaining packing materials can cause personal injury as it contains nails and wood And to avoid danger of suffocation be sure to keep the plastic wrapper away from children and to dispose after tearing it up Be sure to insulate the refrigerant pipes so as not to condense the ambient air moisture on them Insufficient insulation can cause condensation which can lead to moisture damage on the ceiling floor furniture and any other valuables When the air conditioner is operating cooling amp drying operation and the ventilator installed in the room is also running there is the possibility that drain water may backflow as the room enters the negative pressure state Therefore set up the opening port to let air enter the room to provide appropriate ventilation for example open the door a little In addition just as above set up t
94. r site construction Air heat exchanger Liquid pipe k 2 5 Performance curve The cooling and heating capacities are measured in the following conditions The actual capacity can be obtained with the following formula 1 Capacity correction according to indoor and outdoor temperatures 1 3 12 ae TEER LEN S LTL a Correction factor of cooling amp heating capacity in relation to temperature 40 Ee LLLI a SNE 40 B zom Tekel Sd 7 Bam S 5 868 21565 10 16 18 20 22 Indoor air W B erature C W B ISO T1 Standard la l s 465 lt I 9 sg e OE ORO OS NY wl B HS 5 K TON ET 5 5 10 5 0 5 10 15 Outdoor air W B temperature C W B ISO TI Standard 2 Capacity correction according to one way length of refrigerant piping It is necessary to correct the cooling and heating capacity according to the one way length of refrigerant piping Piping lengh m 7 10 15 Cooling 10 0 975 3 Capacity correction according to frosting on outdoor heat exchanger during heating In additions to the foregoing corrections 1 and 2 the heating capacity also needs to be corrected according to the frosting on the outdoor heat exchanger Air inlet temperature of 10 7 5 3 1 1 3 5 outdoor
95. rge hose Charge hose for R410A 3 4 MPa 34 kgf cm 5 1 MPa 51 kgf cm ressure Dressure impedance 17 2 MPa 172 kgf cm 27 4 MPa 274 kgf cm Engineering material NBR rubber With x m 7 16 UNF 1 2 UNF 20 screw threads per inch 20 screw threads per inch c Electronic loadcell scale for charging refrigerant e As a kind of HFC due to the properties of high pressure and high vapor rate R410A can t keep the liquid state and foam state of pneumatolytic refrigerant in the cylinder when the charging cylinder is used to charge R410A and the value is difficult to read Therefore it is recommended to use an electronic loadcell scale for charging refrigerant e The electronic loadcell scale can measure the weight of the refrigerant cylinder though the 4 supporting points therefore it has higher strength The connection of the charge hose has two ports one for R22 7 16 UNF 20 screw threads per inch and one for R410A 1 2 UNF 20 screw threads per inch so it can be used to charge general refrigerants e There are two types of electronic loadcell scale for charging refrigerant one for 10kg cylinders and one for 20kg cylinders Electronic loadcell scale for 10kg cylinders precision 20 Electronic loadcell scale for 20kg cylinders precision 50 e Refrigerant can be charged manually by opening closing the valve d Torque wrench for rating diameters of 1 2 and 5 8 e In order to enhance the pressure impedance the size of flare
96. rs to the indication data of causes of past stops of the indoor unit self diagnosis indication Data of last 5 times can be memorized and the older data is deleted automatically It also includes the temperatures measured by the various sensors room temperature indoor heat exchanger outdoor liquid pipe and outdoor temperature discharge pipe sensors and information of the remote controller operation switching and air flow changes More detailed data can be confirmed As shown in the table below for different operating modes temperature settings and air flow settings of the remote controller different contents are indicated Settings of remote controller Operation Air flow Content of output data switching switching M Indicates the causes of past stops error code indicated in the past Cooling L i Indicates the temperature measured by the room temperature sensor when the error code was indicated Ait Indicates the temperature measured by the indoor heat exchanger sensor when the error code was indicated Indicates the information on the remote controller when the error code was indicated M Indicates the temperature measured by the outdoor air temp sensor when the error code was indicated Indicates the temperature measured by the outdoor heat exchanger sensor when the error code was indicated Indicates the temperature measured by the discharge pipe sensor when the error code was indicated Setting of remote Indicates the time
97. s flashing ia Flash 4 times Vent pipe sensor error Vent pipe sensor wire break poor connector connection Flash 1 time Current cut Compressor blockage compressor output open phase power short circuit control valve closed Power cut compressor wire break Outdoor unit error Vent pipe sensor wire break poor connector connection Flash 2 times Compressor not rotating dead lock RUN lamp Flash 3 times Safe current Overload over current ON 7 Power transistor error e Failure of power transistor Flash 4 times SE re N Insufficient refrigerant failure of vent pipe sensor control valve Flash 5 times Compressor over heat protection closed T Failure of power supply signal cable break failure of at iranemis 8 P sig Flash 6 times Signal transmission error indoor outdoor unit control device Failure of compressor RUN lamp Flash 2 ti Rotor lock T N as times Compressor open phase Flash 2 times a Failure of outdoor unit control device The air conditioner indicates the error of the indoor and outdoor sensors thermistors only when it is in the stop mode Error indication is removed after restart 1 2 Model identification SR K 25 Q A S R410A Refrigerant used Master pattern change code Master pattern Capacity Wall mounted type C is the code for outdoor unit Split type room air conditioner 1 2 MODEL S
98. se joints single end loose joints pipe tee joints and corner joints are generally used See Figure 1 Double ended loose joint Single end loose joint Pipe tee joint Corner joint Single end corner joint Figure 1 Flared joints b Sleeve joints Sleeve joints need welding for connection and are mainly used for pipes with a diameter exceeding 20mm The thicknesses of sleeve joints are shown in Table 4 Sleeve joints corner joints and pipe tee joints are generally used See Figure 2 Table 4 Min thickness of sleeve joints 1 En A t Pipe tee joint Pipe tee joint of different diameters Figure 2 Sleeve joints 7 2 2 Handling of piping materials When mounting refrigerant pipes be careful to prevent water or dust from entering the pipes do not use oil other than the lubricant used in the air conditioner and avoid refrigerant leakage Use dehydrated lubricant for piping Be sure to use airtight cover or similar cover gasket to seal the container for storage 1 Flaring procedure and precautions a Cutting pipes Use a pipe cutter to cut the pipes slowly to avoid distortion b Removing burrs and nicks Burrs or nicks on the flared position may cause refrigerant leakage Remove all burrs and clean the cutting surface carefully before mounting c Inserting flare nuts 63 d Haring Ensure to clean the clamps and copper pipes Use the clamping bars to conduct flaring correctly Use the flare tools for
99. sor are checked every 5 minutes after the cooling amp drying is selected to determine the operation range of drying e Operation ranges are shown in the table below TION lt SP 1 SP ISTIONSSP SP lt TION lt SP 2 SP 2 lt TION range Normal Range A operation High Range I Range F Range E Range D humidit type e The range of humidity sensor is judged according to the following High humidity range Low humidity range 55 70 RH e The operations of the components in the operation range of cooling amp drying are as follows Pos NN EA ES EE NU Functional component s rm HZ fan speed speed speed speed speed speed outdoor fan 4 way valve OFF indoor continuous instructions 0 OFF F indoor continuous instructions 0 When the set temperature change signal is received the original range will be continued till finished in the next 5 minutes the room temperature TION set temperature SP and value of humidity sensor are checked to determine the new operation range When a range other than Range I is switched to Range I the control is as follows A According to the Stop mode B 18 B Prevent Range I in jiggle operation from changing to Range C operation 9 Operation of Range I Ist speed Indoor fan OFF Temperature and humidity check Temperature and humidity check b Heating amp drying After heating amp drying is determin
100. st error Cooling Temp measured by room temp sensor of fourth to last error Temp measured by indoor heat exchanger sensor of fourth to last error Info of remote controller of fourth to last error Temp measured by outdoor air temp sensor of Heating fourth to last error Temp measured by outdoor heat exchanger liquid pipe sensor of fourth to last error Temp measured by discharge pipe sensor of lt fourth to last error Code of fifth to last error Cooling Temp measured by room temp sensor of fifth to last error Temp measured by indoor heat exchanger sensor of fifth to last error Info of remote controller of fifth to last error Temp measured by outdoor air temp sensor of fifth to last error o Heating Temp measured by outdoor heat exchanger liquid pipe sensor of fifth to last error Temp measured by discharge pipe sensor of fifth to last error Code of last stop N N Code of second to last stop Code of third to last stop Code of fourth to last stop Code of fifth to last stop Code of sixth to last stop NIN AIO N n m Cooling N ON Code of seventh to last stop N Code of eighth to last stop N Code of ninth to last stop w Code of tenth to last stop Judgment Remark 48 TIMER lamp no of times Checke 7 Check method according to the content of failure rror of sensor Wire break of sensor and poor joi
101. the refrigerant circuit into which air is sucked Do not put the drainage pipe directly into drainage channels where poisonous gases such as sulphide gas can occur Poisonous gases will flow into the room through drainage pipe and seriously affect the user s health and safety Never connect the power cord to the central socket Never use extended wires or share a socket with other electrical appliances This may cause fire or electric shocks due to defective contact poor insulation and over current etc Do not discharge R410A to the atmosphere R410A is a fluoride greenhouse gas and can cause global warming if it is discharged to the atmosphere Carry out the electrical work for ground lead with care Do not connect the ground lead to the gas line liquid line Ensure that no air enters in the refrigerant circuit when the unit is installed and removed If air enters in the refrigerant circuit the pressure in the refrigerant circuit becomes too high which can cause burst and personal injury Do not bundle or wind the power cord Or do not deform the power plug by treading it This may cause electric shocks heating or fire Do not run the unit with removed panels or protections Touching rotating equipments hot surfaces or high voltage parts can cause personal injury due to entrapment burn or electric shocks Do not perform any change of protective device itself or its setup condition The forced operatio
102. tive Yes 30 36 37 21 22 2 24 25 26 27 28 29 15 27 18 19 __ 2 2 4 5 6 7 8 9 0 ___ 1 2 3 4 5 4 7 8 ____ ____ 11 12 13 14 15 16 17 18 19 __ 2 202 22 23 24 25 26 27 28 29 i x 3 80 31 32 33 34 35 36 37 38 39 Notsoung 40 1 42 43 44 45 46 47 48 49 ____5 50 51 52 53 54 55 56 57 58 59 6 4 4 62 63 64 65 66 67 68 69 8 80 8 82 63 85 6 87 88 89 35 92 9 2 93 94 95 96 97 98 99 Tf there is data recorded the error code is normal the information of each sensor is as showed in the table below code is normal temperature sensor exchanger sensor temp sensor Temperature measured by outdoor heat exchanger liquid pipe sensor Example Temperature measured by room temperature sensor indoor heat exchanger sensor outdoor air temp sensor and outdoor heat exchanger liquid pipe sensor 9 C 45 __ Sound of When the temperature is lt 0 the buzzer will sound buzzer u ud When the temperature is gt 0 the buzzer will not sound Negative OFF RUN lamp ON tens place TIMER lamp ON ones place OFF 11 sec cycle 46 f List of temperatures of compressor vent pipe Unit C TIMER lamp ones place RUN lamp 0 1 2 3 4
103. tle through the cooling operation For the amount of each additional charging see the operation manual prepared by the equipment manufacturer If the amount of the first charge is inadequate charge for the second time with the same method as for the first charge after one minute Note Never charge large amount of liquid refrigerant at a time in the cooling mode as the liquid refrigerant is charged from the gas side 71 f After charging the liquid refrigerant into the air conditioner by closing the charging valve fully close Valve Lo of the manifold pressure gauge to stop g Quickly move the charge hose away from the service opening If the movement is slow the circulating refrigerant may be leaked h Secure the covers of the service opening and control valve and check for any gas leakage around the covers 6 7 Liquid side Indoor unit Outdoor unit Control valve 2 way WZ ig YE Start dE FB C Gas side iH Refrigerant cylinder CUERO QUU with syphon tube TZ DHT m ontrol valve Service e 3 way N 35 Start D t FR u I a E md MU valve 5 63 Sd AM 6 WIED Electronic loadcell scale for charging refrigerant A R RIM Be Figure 7 Structure for additional refrigerant charging 7 3 3 Removal when new refrigerant piping is used 1 Removing the equipment a To recover refrigerant from the outdoor unit thro
104. ugh evacuation Use the manifold pressure gauge for R410A in evacuation Recover refrigerant from the outdoor unit when the equipment is operating in the HI POWER cooling mode For the steps and precautions for recovery see the user s manual prepared by the equipment manufacturer Precaution Use the refrigerant recovery device for outdoor unit in which evacuation is impossible b To remove indoor unit outdoor unit eRemove the pipes and wires between the indoor and outdoor units e Tighten the control valve and service opening of the outdoor unit to the specified torque e Tighten the flare nut with cap at the connection between the indoor and outdoor units to the specified torque e Remove the indoor unit outdoor unit Precaution Be careful not to break the piping for the indoor unit when it is stored in the original place 2 Installing the equipment a According to the steps described in 7 3 2 New installation 7 3 4 Replacing equipment never use the existing refrigerant piping To replace an air conditioner using conventional refrigerant R22 with one using the alternative refrigerant R410A or replace an air conditioner using the alternative refrigerant R410A with another using the alternative refrigerant R410A please use completely new refrigerant piping 1 otherwise the difference of pressure properties of refrigerants or the difference of lubricants may cause failure Not all air conditioners using R410A use t
105. unction or cause jamming Do not use any materials other than a fuse with the correct rating in the location where fuses are to be used Connecting the circuit with copper wire or other metal thread can cause unit failure and fire Do not touch any buttons with wet hands It can cause electric shocks Do not touch any refrigerant pipes with your hands when the system is in operation During operation the refrigerant pipes become extremely hot or extremely cold depending on the operating condition and it can cause burn injury or frost injury Do not put anything on the outdoor unit and operating unit This may cause damage of the object or injury due to the fall of the object The appliance must be installed at a location with the air intake and vents being 10cm away from walls In case the fence is 1 2m or above in height or is overhead the sufficient space between the unit and walls shall be secured When the unit is installed the space of the following dimension shall be secured 10cm MI No obstacles Service space for electrical How to remove and install the front panel Removal Installation D Remove the air inlet Remove air filter grille Cover the unit with the Remove the 2 screws securing the front panel Remove the 3 latches on the upper part of the front panel and remove the front panel from the unit front panel 25 Tighten the 2 screws to s
106. unit 4 Example of cooling and heating capacity calculation The actual cooling capacity of model SRK25QA S with the one way piping length of 25m at the indoor wet bulb temperature of 19 C and outdoor dry bulb temperature of 35 Cin summer or indoor dry bulb temperature of 20 C outdoor dry bulb temperature of 1 Cand indoor wet bulb temperature of 1 C in winter is Actual cooling capacity 2500 x 1 0 X 0 95 2375W Nominal cooling Temp correction Piping length capacity factor correction factor Actual heating capacity 3200 x 0 81 x 095 x 0 86 2118W Nominal heating Temp correction Piping length Frosting capacity factor correction factor correction factor 3 ELECTRICAL WIRING DIAGRAM 3 1 Circuit diagram 25QA S 8 HELE BESS 3 2 Circuit diagram 35QA S REACTOR CM COMPRESSOR MOTOR FMo FAN MOTOR EEV ELECTRIC EXPANSION VALVE COIL Th2 HEAT EXCHANGE SENSOR Th4 DISCHARGE PIPE TEMP SENSOR 20S 4 WAY VALVE COIL LEGEND R PRINTED CIRCUIT EN B 3 NHA elen e PWB ASSY OUTDOOR 4 NAME OF EACH PART AND ITS FUNCTION 4 1 Name of each part Air inlet panel rE Draws in the indoor air Unit indication section and remote control signal receiver Wireless remote control Removes dust or dirt from the inlet air Room temperature detector Unit operation switch Air outlet Air blows from here Up down air direction flap
107. ure to select pipe sleeves suitable for R410A b Insulated copper pipes Before using insulated copper pipes ensure their thickness is suitable RA10A c Bare copper pipes Be sure to use bare copper pipes of a thickness as shown in Table 3 see Page 59 and try to keep them clean The surface of bare copper pipes is exposed so be especially careful to handle them and mark them to prevent misuse 3 Precautions before mounting Pay attention to the following during pipe connection a Before connecting to the appliance use caps etc to seal all pipe opening b Be especially careful in pipe mounting in rainy days If water enters the pipe the lubricant may deteriorate which causes failure of the appliance c Connect the pipes as quickly as possible If the pipes are kept open for a long time please fully charge them with nitrogen or use a vacuum pump for drying 7 2 4 Welding 1 Processing connection Due to fusion cast between the surfaces of joints which produces very high adhesive strength be sure to leave adequate space for welding and keep adequate gap between the surfaces of joints The minimum depth of penetration of joint of copper pipe the outside diameter of inner pipe and the gap between the outer pipe and the inner pipe are shown in Table 10 If copper brazing filler is used the pipe connection is the most secure when the gap is kept between about 0 05 0 1mm Table 10 Minimum depth of penetration and gap between copper
108. uring heating operation only and should be satisfied However the temperature measured by Th4 is below 5 C when the frequency is above 62 rps and below 4 C when the frequency is below 62 rps 2 Operation of functional components during defrosting operation 25 35 models Heat retaining Corresponding speed Indoor fan OFF ON RUN lamp Flashing Heat retaining E Heat retaining Fuzzy calculated value Inverter instruction 0 frequency Corresponding Outdoor fan ee OFF 4 way valve ON OFF Defrosting operation Final defrosting operation preparation m f Defrosting end Normal heating operation Defrosting operation Th4213C 10 min Defrosting control Note When the temperature measured by the outdoor heat exchanger sensor Th4 becomes 2 C or higher the inverter instruction frequency changes from 70 rps to 50 rps 3 Ending conditions Operation returns to the heating operation when either of the following is met Temperature measured by outdoor heat exchanger sensor Th4 13 C or higher Continued operation time of defrosting More than 10 min 16 e HI POWER Heating operation HI POWER button on remote controller ON High rotate speed operation 10115 minutes Detail of operation SRK25QA S SRK35QA S Inverter instruction frequenc Heat retaining mode max 9th speed Outdoor fan Corresponding to instruction frequenc Notes 1 Room temperature ca
109. urrent heating safety I can be read from the list 1 5 sec RUN lamp ON tens place OFF TIMER lamp ON ones place 2 Abnormal stop indication No indication automatic restoration only O With indication Indication with means the number of automatic restorations for the same cause with error indication Indication without means one error indication occurs 3 Automatic restoration No indication O With indication d Remote controller information list 1 Operation switching 2 Air flow switching Operation switching Air flow switching status mode status at the time of mode at the time of abnormal Operation switching Air flow switching ___2 _ __ 4 tO 6 HIPOWER f there is no data recorded the error code is normal the information on the remote controller is as showed in the table below Settings of remote controller Indication when the error code is normal Operation switching AUTO Air flow switching AUTO Example Operation switching Cooling Air flow switching HI 1 5 sec RUN lamp ON tens place TIMER lamp ON ones place ones place Opp 44 e List of temperatures measured by room temperature sensor indoor heat exchanger sensor outdoor air temp sensor and outdoor heat exchanger liquid pipe sensor TIMER lamp ones place RUN lamp Does the buzzer sound tens place Sound means nega
110. ve Cooling operation If the room temperature is too low run the HI POWER cooling When the pressure gauge indicates 0 01Mpa stop cooling and close the gas valve Safe disposal of product after the useful life The safe comfortable useful life of the product is 10 years Some products may be used even after the normal useful life is expired For the destruction or disposal of the product and waste after the useful life has expired the impact on safety and environment must be considered Installation test check points Check the following points after completion of the installation and before turning on the power Conduct a test run and ensure that the unit operates properly At the same time explain to the customer how to use the unit and how to take care of the unit following the installation manual After installation Test run The power supply voltage is correct as the rating Air conditioning and heating are normal No gas leaks from the joints of the operation No abnormal noise valve Water drains smoothly Power cables and crossover wires are securely Protective functions are not working fixed to the terminal block The remote control is normal Operation valve is fully open Operation of the unit has been explained to the D The pipe joints for indoor and outdoor pipes have customer been insulated When the air conditioner is restarted or when changing the operation the unit wi
111. welding flux is hard to carbonize Slag is easily removed after welding The corrosion of treated metal and brazing filler is slight Good spreading property harmless to human body As described above the working of welding flux is complex therefore an appropriate type of welding flux must be selected according to the type and shape of treated metal type of brazing filler and welding mode etc c Types of welding flux e Corrosion resistant welding flux This type of welding flux is generally composed of borax and boric acid Suitable for welding temperature of above 800 C Active welding flux Most welding fluxes used for silver brazing are active welding fluxes The borax boric acid compound is added with potassium fluoride potassium chloride sodium fluoride etc so it has enhanced oxide film removing ability Precautions Remove the welding flux after welding If the chlorine contained in the welding flux is left in the pipe it may cause deterioration of lubricant Therefore do not use welding flux containing chlorine 3 When adding water to the welding flux do not use water containing chlorine such as distilled water or ion exchange water 4 Welding Welding requires complicated technique and experience so it must be operated by professionals In order to prevent the formation of oxide film in the pipe conduct welding when the nitrogen is flowing lt Welding method to prevent oxidation gt a Connect

Mitsubishi Heavy Industries Air Conditioners Technical Manual

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