Home

Alternative refrigerant R410A use models SRK25ZD-S, 35ZD

1. A CAUTION HIGH VOLTAGE on High voltage is produced in the control box Don t touch electrical parts in the control box for 5 minutes after the a isu ml elm AF LI AF L2 U V W Black L 1 e5 oe LOUT2BL pl es Ti N OUT2 IC12 22 Bed At SR Ni meN eg Green CNO I bad Blue i Orange G3 N_3 P_l White jj BK RD Yellow Green PWB1 RL F2 250V 15A N JPI gin m mi um m miy 2 cs DC P 2 2 Check lamp 232 CNG g gi g Swm num mm mn mu mn ao DCN z i ot PWB3 CNS CNB CND CNJ Th4 ThS Th6 wu wie tae HI NE NIE NIM E EA C EAN Inspection of input to PCB Check the voltage between terminals on the terminal block It is normal if AC 220 230 240V is detected WM WHE WI HNA MAIE eet mn wiih iit Me ae HH 7 LLL LLL LLL Inspection of serial signal Check the voltage between terminals on the terminal block It is normal if the needle swing in the range of DC 0 Approx 12V mn ih Win ae dh tt at WNW WE ten ee eee eee ee mi uin um nu nu um thermistor Remove the connector and check the resistance value Power transistor inspection procedure Use a tester with a needle indicator for the inspection Do not use a digital tester Check in the AC 300 volt range 1 If there is a self diagnosis display inspect the compressor system burns wiring mistakes etc I
2. adjustment ae Fig 3 Flare processing dimensions Table 5 Dimensions related to flare processing for R410A A mm Nominal Outer diamet Thickness ainiti y p a ath Flare tool for R410A Conventional flare tool Clutch type Clutch type Wing nut type 1 4 6 35 0 8 0 0 5 1 0 1 5 1 5 2 0 3 8 9 52 0 8 0 0 5 1 0 1 5 1 5 2 0 1 2 12 70 0 8 0 0 5 1 0 1 5 2 0 2 5 5 8 15 88 1 0 0 0 5 1 0 1 5 2 0 2 5 Table 6 Dimensions related to flare processing for R22 A mm Nominal Outer diamet Thickness Acie u Pe FE Gi Flare tool for R410A Conventional flare tool Clutch type Clutch type Wing nut type 1 4 6 35 0 8 0 0 5 0 5 1 0 1 0 1 5 3 8 9 52 0 8 0 0 5 0 5 1 0 1 0 1 5 1 2 12 70 0 8 0 0 5 0 5 1 0 1 5 2 0 5 8 15 88 1 0 0 0 5 0 5 1 0 1 5 2 0 CLL Fig 4 Relations between flare nut and flare seal surface Table 7 Flare and flare nut dimensions for R410A EEA Nominal Outer diameter Thickness Dimension mm i diameter mm mm A B C D Flare nut width 1 4 6 35 0 8 9 1 9 2 6 5 13 17 3 8 9 52 0 8 13 2 13 5 9 7 20 22 1 2 12 70 0 8 16 6 16 0 12 9 23 26 5 8 15 88 1 0 19 7 19 0 16 0 25 29 55 Table 8 Flare and flare nut dimensions for R22 unit mm Nominal Outer diameter Thickness Dimension mm diameter mm mm A B c D Flare nut width 1 4 6 35 0 8 9 0 9 2 6 5 13 17 3 8 9 52 0 8 13 0 13 5 9
3. Specified torquing value Specified torquing value Liquid side 06 35 14 0 18 0N m 1 4 1 8kgf m Liquid side 06 35 14 0 18 0N m 1 4 1 8kgf m Gas side 99 52 34 0 42 0N m 3 4 4 2kgf m Gas side 09 52 34 0 42 0N m 3 4 4 2kgf m 912 7 49 0 61 0N m 4 9 6 1kgf m 912 7 49 0 61 0N m 4 9 6 1kgf m Use one more spanner to fix the valve Always use a Torque wrench and back up spanner to tighten the flare nut Air purge a Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak b Connect service valve charge hose manifold valve and vacuum pump as is illustrated below c Open manifold valve handle Lo to its full width and perform vacuum or evacuation Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads 0 1 MPa 76 cmHg d After completing vacuum operation fully open service valve Both gas and liquid sides with hexagon headed wrench e Check for possible leakage of gas in the connection parts of both indoor and outdoor Compound Pressure pressure gauge gauge Gauge Manifold 0 1MPa Designed specifically for R410A 76cmHg Service Valve two way valve Handle Hi Charge hose Designed specifically for R410A Service Valve three way valve Service Port Handle Lo Vacuum pump Charge hose Designed specifically for R410A Vacu
4. ZA CAUTION section as well In either case important safety related information is indicated so by all means properly observe all that is mentioned After completing the installation along with confirming that no abnormalities were seen from the operation tests please explain operating methods as well as maintenance methods to the user customer of this equipment based on the owner s manual Moreover ask the customer to keep this sheet together with the owner s manual WARNING To disconnect the appliance from the mains supply this appliance must be connected to the mains by means of a circuit breaker or a switch use a recognized 16A with a contact separation of at least 3mm The appliance shall be installed in accordance with national wiring regulations This system should be applied to places as households residences and the like Application to inferior environ ment such as engineering shop could cause equipment malfunction Please entrust installation to either the company which sold you the equipment or to a professional contractor Defects from improper installations can be the cause of water leakage electric shocks and fires Execute the installation accurately based on following the installation manual Again improper installations can result in water leakage electric shocks and fires For installation confirm that the installation site can sufficiently support heavy weight When strength is ins
5. Indoor power relay Outdoor N min 55sec Stop Full stop Stop Full stop Stop Restart Stop Restart 0 rps command 0 rps command 0 rps command 0 rps command 23 SRK50ZD S When stopped or reset by outdoor unit protective function When stopped by indoor unit controller Function Operation Heating heating Cooling cooling Heating heating Cooling cooling oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying 2 min o speed speed CLZ a Indoor Speed 2 Orr S S 2nd speed a Outdoor Full stop Stop Full stop Stop Restart Stop Restart 0 rps command 0 rps command 0 rps command 0 rps command Note 1 When the start delay of compressor of indoor unit controller is actuated and the operation is reset it takes 2 minutes and 55 seconds 24 5 APPLICATION DATA SAFETY PRECAUTIONS Please read these Safety Precautions first then accurately execute the installation work Though the precautionary points indicated herein are divided under two headings WARNING and ZACAUTION those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the A WARNING section However there is also a possibility of serious consequences in relationship to the points listed in the
6. The piping length is 7 5m 2 The operation data are applied to the 220 230 240V districts respectively 3 The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping Purging is not required even for the short piping If the piping length is longer when it is 15 to 25m add 20 g refrigerant per meter 2 2 Range of usage amp limitations Models SRK25ZD S 35ZD S SRK50ZD S Item Indoor return air temperature Upper lower limits Refer to the selection chart Outdoor air temperature Upper lower limits Refrigerant line one way length Max 15m Max 25m Vertical height difference between Max 10m Outdoor unit is higher Max 15m Outdoor unit is higher outdoor unit and indoor unit Max 10m Outdoor unit is lower Max 15m Outdoor unit is lower Power source voltage Rating 10 Voltage at starting Min 85 of rating Frequency of ON OFF cycle Max 10 times h ON and OFF interval Max 3 minutes 2 3 Exterior dimensions 1 Indoor unit Models SRK25ZD S 35ZD S 50ZD S Unit mm 249 3 Piping hole right left Terminal block 45 117 5 ke 380 sa a 3 216 5 450 148 5 148 5 450 216 5 R i q g Aj N t t Q y J SaN H S
7. Table 1 Comparison of thermophysical properties of R410A and Table 2 Comparison of saturated vapor pressure of R22 R410A and R22 iit ei R410A R22 Refrigerant R410A R22 Composition R32 R125 R22 Temperature C wt 50 50 100 20 0 30 0 14 Molecular weight 72 6 86 5 0 0 70 0 40 Boiling point C 51 4 40 8 20 1 35 0 81 Vapor pressure 25 C MPa 1 56 0 94 40 2 32 1 43 Saturated vapor density 25 C kg m 64 0 44 4 60 3 73 2 33 Inflammability Nonflammable Nonflammable 65 4 15 2 60 Ozone depletion potential ODP 0 0 055 Source List of thermophysical properties complied by the Japan Global warming potential GWP 1730 1700 society of refrigeration and air conditioning NIST Source List of thermophysical properties complied by the Japan society of REFPROP V5 10 etc refrigeration and air conditioning NIST REFPROP VS 10 etc 52 3 Lubricating oils for R410A As the lubricating oils for R22 mineral oils alkylbenze synthetic oils etc have so far been used As R410A features less solubility with these conventional lubricating oils such as mineral oils the lubricating oils tend to stay within the refrigeration cycle As the lubricating oils highly soluble with R410A ester ethereal and other synthetic oils are available However as these synthetic oils are very hygroscopic they must be treated even more carefully than the conventional lubricating oils Furthermore if these syn thetic oils are mixed with mineral
8. 000 4 2 Back up Switch ccrcsc catheters ites 4 3 Power blackout auto restart fUNCTION cceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees AA F ap CONnUOl crc E ee Oe eaes 4 5 Comfortable timer Setting cccccceeseseseseeeseeeeeeeeeeeeeeeeseeeeeeeeeneeees 4 6 Outline of heating Operation cccccccesseseseeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeeees 4 7 Outline Of COOLING operation ccccccccesseeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeees 4 8 Outline of dehumidifying Operation csssseeeeeeeeeeeeeeeeeeeeeeseeeeeeeees 4 9 Outline Of automatic operation cccccceeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 4 10 Economical operation ccecceceeeeeeeeeeeeeeseeeeeeeeeeeeeeeeseseesseseeeeeeeees 4 11 Protective control function isssescecss ccc veccncncsesticcccean cece catiacevansocccaceiccdces 5 APPLICATION DATA viscosities ieee eat he hose eevee epee ea 5 1 Selection of location for installation cssseeeeeeeceeeeeeeeeeeeeeeeeeeeees 5 2 Installation Of indoor UNIt cceeeeee cece ee eeeeeeeeeneeeeeeeeeeeeeeeeeeeeeeeeeeeeenees 5 3 Installation Of outdoor unit 2 2 2 cece e cece eens eeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeneees 5 4 Refrigerant piping eos ett eee eect Ss eam 0 9 eee Sn ee Nr ey ope ene enn ee re aes eer 5 6 Precautions for wireless remote controller installation and OP GM AON e arrape eraa ar aaa aa ees s rrea re raa aaae Arana aaan enida aasa
9. As R410A features pressure about 1 6 times higher than R22 it is necessary to use a copper pipe which has a thickness stated in Table 3 see on page 53 and which contains less contaminants It is necessary to carefully treat store copper pipes so that they are not collapsed deformed or damaged Due care must also be exercised so that foreign matters such as dust and water do not enter the pipe interior A piping set s open end is sealed with a cap etc When storing it make sure that it is sealed securely When storing a cladded with heat insulation without heat insulation with flare processing General name a Piping set without flare processing b Copper pipe with insulation without flare processing c Bare copper pipe bare copper pipe copper pipe or bare copper pipe securely seal the opening with pinching taping etc 56 2 3 Identification a b c Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 see on page 53 and as shown in Tables 5 and 6 see on page 55 it also differs from R22 in flare processing and flare nut dimensions So it is necessary to choose a piping set suitable for R410A Copper pipe with insulation Before using a copper pipe with insulation make sure that it has a thickness designated for R410A Bare copper pipe It is necessary to use a bare copper pipe which has a thickness designate
10. During the operation remain at work site to ensure safety If you have to leave your work site for any unavoidable reason stop the operation after ascertaining that the recovering cylinder is not overcharged c During the operation if the refrigerant recovering equipment s overcharging prevention mechanism operates and the equip ment stops automatically replace the recovering cylinder with an empty one d Ifthe pressure gauge s reading increases after a short time from the accomplishment of recovery and automatic stoppage of the refrigerant recovering equipment restart the equipment and if it stops again finish the recovery 5 Procedures after recovery a Close the valves on the air conditioner subjected to refrigerant recovery the refrigerant recovering equipment and the recover ing cylinder b Detach the recovering cylinder charged with refrigerant and store it as required by law 7 4 2 Accessories tools In order to carry out R410A recovery a variety of accessories tools are required Shown below are standard accessories 1 Recovering cylinder e Use a recovering cylinder designated by the equipment manufacturer e A detachable cylinder must be such that it complies with the laws and regulations concerned e Do not use an ordinary cylinder as a recovering cylinder Note 1 A cylinder available when R410A was purchased is a borrowed one Note 2 As a cylinder available when R410A was purchased is provided with a check va
11. g Tightly secure the cap on the service port O h After securing the caps on the control valves check the caps periphery if there is any gas leakage O O Compound pressure Gauge manifold gauge 76cmHg Handle Lo Handle Hi always closed Charge hose Charge hose Vacuum pump adapter Vacuum pump Control valve 2 way Caution e Be sure to use the vacuum pump vacuum pump adapter and gauge manifold to refer to their instruction manuals beforehand e Ascertain that the vacuum pump is filled with oil to the level Service port Control valve designated on the oil gauge 3 way Fig 6 Configuration of air purge by vacuum pump 2 Additional refrigerant charging required for refrigerant piping length longer than standard length The following steps should be taken following the step e in 1 above See Fig 7 a Set the refrigerant cylinder to the electronic balance and connect the connecting hoses on the cylinder and electronic balance s connecting port Caution Be sure to make setting so that liquid can be charged When using a cylinder equipped with a siphon liquid can be charged without turning it upside down b Connect the gauge manifold s charge hose to the electronic balance s connecting port c Open the refrigerant cylinder s valve and after opening the charging valve a little close it 0 d After making zero 0 adjustment open the charging valve and
12. s digit OFF ON Timer lamp 1 s digit OFF a 1 5 sec a_i 11 second interval 42 Service data record form Customer Model Date of investigation Machine name Content of complaint Remote controller settings Display results sea Sas ait Content of displayed data isplay content Temperature setting Operation switching Fan speed switching pay Buzzer Yes No Run lamp Times Timer lamp Times MED Error code on previous occasion Cooling HI Room temperature sensor temperature on previous occasion AUTO Indoor heat exchanger sensor temperature on previous occasion 21 LO Remote controller information on previous occasion MED Outdoor temperature sensor temperature on previous occasion Heating TETTA HI Outdoor heat exchanger liquid pipe sensor temperature on previous occasion AUTO Discharge pipe sensor temperature on previous occasion MED Error code on second previous occasion Cooling HI Room temperature sensor temperature on second previous occasion AUTO indoor heat exchanger sensor temperature on second previous occasion 22 LO emote controller information on second previous occasion MED Outdoor temperature sensor temperature on second previous occasion Heating Ths 3 7
13. 21 C 1 time previous previous time 22 C 2 times previous 23 C 3 times previous 24 C 4 times previous 25 C 5 times previous Example Remote controller setting Operation Fan speed Temperature Displayed data switching switching setting Cooling MED 21 C Displays the reason for the stop error code the previous time an error was displayed 22 C Displays the reason for the stop error code 2 times previous when an error was displayed 23 C Displays the reason for the stop error code 3 times previous when an error was displayed 24 C Displays the reason for the stop error code 4 times previous when an error was displayed 25 C Displays the reason for the stop error code 5 times previous when an error was displayed 37 Stop data Remote controller setting Operation Fan speed Temperatur Displayed data switching switching setting Cooling LO 21 C Displays the reason for the stop stop code the previous time when the air conditioner was stopped by protective stop control 22 C Displays the reason for the stop stop code 2 times previous when the air conditioner was stopped by protective stop control 23 C Displays the reason for the stop stop code 3 times previous when the air conditioner was stopped by protective stop control 24 C Displays the
14. 4 The refrigerant pipe work should not be come blocked with scale or flux 5 The brazed part should not restrict the flow in the refrigerant circuit 6 No corrosion should occur from the brazed part Prevention of overheating Due to heating the interior and exterior surfaces of treated metal may oxidize Especially when the interior of the refrigerant circuit oxidizes due to overheating scale occurs and stays in the circuit as dust thus exerting a fatally adverse effect So make brazing at adequate brazing temperature and with a minimum of heating area Overheating protection In order to prevent components near the brazed part from overheating damage or quality deterioration due to flame or heat take adequate steps for protection such as 1 by shielding with a metal plate 2 by using a wet cloth and 3 by means of heat absorbent Movement during brazing Eliminate all vibration during brazing to protect brazed joints from cracking and breakage Oxidation preventive In order to improve the brazing efficiency various types of antioxidant are available on the market However the con stituents of these are widely varied and some are anticipated to corrode the piping materials or adversely affect HFC refrigerant lubricating oil etc Exercise care when using an oxidation preventive 7 3 Installation removal and servicing 7 3 1 Tools for R410A In the case of an air conditioner using R410A in order to prevent any other r
15. Operation lamp Flashing Hot keep Corresponding aa ie Hot keep Th ea ae Hot keep Outdoor nit Fuzzy calculated Inverter value command 0 Outdoor fan 4 way valve Corresponding to Speed OFF ON OFF Defrost operation 60 sec preparation A X Defrost operation Final defrost operation 75 sec gt N Defrostend Th4 gt 20 C 10 minutes Defrost control ormal heating operation restored Note 1 When outdoor unit heat exchanger thermistor Th4 temperature becomes 7 C or higher inverter instruction changes 70 rps to 50 rps iii Ending conditions Operation returns to the heating cycle when either one of the following is met Outdoor heat exchanger thermistor Th4 temperature 13 C or higher 50 type 20 C or higher Continued operation time of defrosting For more than 10 min e Heating HI POWER operation HI POWER button on remote controller ON Operation is maintained for 15 minutes with a higher blow out air temperature Detail of operation Model Item SRK25 35ZD S SRK50ZD S Inverter speed 102 rps 120 rps Indoor fan Hot keep M mode max 8th speed Hot keep M mode max 7th speed Outdoor fan 4th speed Notes 1 Room temperature is not adjusted during the HI POWER operation 2 Protective functions will actuate with priority even during the HI POWER operation 4 7 Outline of coo
16. 7 20 22 1 2 12 70 0 8 16 2 16 0 12 9 20 24 5 8 15 88 1 0 19 4 19 0 16 0 23 27 2 Flare connecting procedures and precautions a Make sure that the flare and union portions do not have any scar or dust etc b Correctly align the processed flare surface with the union axis c Tighten the flare with designated torque by means of a torque wrench The tightening torque for R410A is same as that for conventional R22 Incidentally when the torque is weak the gas leakage may occur When it is strong the flare nut may crack and may be made nonremovable When choosing the tightening torque comply with values designated by manufacturers Table 9 shows reference values Note When applying oil to the flare surface be sure to use oil designated by the manufacturer If any other oil is used the lubricating oils may deteriorate and cause the compressor to burn out 7 2 3 Storage of piping materials Table 9 Tightening torque of flare for R410A Reference values Nominal Outer diameter Tightening torque Tightening torque of torque diameter mm N m kgf cm market N m kgf cm 1 4 6 35 14 18 140 180 16 160 18 180 3 8 9 52 33 42 330 420 42 420 1 2 12 70 50 62 500 620 55 550 5 8 15 88 63 77 630 770 65 650 1 Types and storage of piping materials Refrigerant piping materials for air conditioners are broadly classified into the following types Refrigerant piping materials
17. 9 Heating F Temp difference between Cooling 13 15 13 15 14 16 return air and supply air C Heating 18 20 18 20 24 26 R nhiig cumeria cooling 3 1 3 0 2 9 5 4 5 2 5 0 7 6 7 3 7 0 Heating 4 5 4 3 4 1 5 9 5 7 5 4 9 0 8 6 8 2 Note 1 The data are measured at following conditions Ambient air temperature Indoor side Cooling 27 C DB 19 C WB Heating 20 C DB Outdoor side Cooling 35 C DB 24 C WB Heating 7 C DB 6 C WB 31 5 6 Precautions for wireless remote controller installation and operation 1 Wireless remote controller covers the following distances a When operating facing the air conditioner 0 5 I1m N 7 lt Wireless remote controller 5 m or less b When manipulating the remote controller mounted on a wall Make sure that it works normally i e transmission reception signal is audible before mounting 60 or less 32 Notes 1 The remote controller is correctly facing the sensing element of the air conditioner when being manipulated 2 The typical coverage is indicated in the left illustration It may be more or less depending on the installation 3 The coverage may be less or even nil If the sensing element is exposed to strong light such as direct sunlight illumination etc or dust is deposited on it or it is used behind a curtain etc Receiver Remote controller available jn this area 6 MAINTENANCE DA
18. At the time of pump down use a gauge manifold exclusive for R410A e Operating the unit in forced cooling mode recover refrigerant from the outdoor unit For details of reclaiming steps and precautions see the instruction manual prepared by the equipment manufacturer Caution In the case of an outdoor unit which is incapable of pump down use a refrigerant recovery unit b Removing the indoor outdoor units Remove the piping and wiring between the indoor and outdoor units Tighten the outdoor unit s control valves and service port with the specified torque e Tighten the capped flare nuts at the indoor outdoor units connecting part with the specified torque e Remove the indoor outdoor units Caution When storing the indoor unit piping in its original position be careful not to break the piping 2 Installing the unit a Proceed with the installation following the steps described in 7 3 2 New installation work 7 3 4 Replacing the unit Never use the existing refrigerant piping Use a brand new refrigerant piping 1 when replacing the air conditioner using the conventional refrigerant R22 with an air conditioner using the alternative refrigerant R410A or 2 even when replacing the air conditioner using the alternative refrigerant R410A with another air conditioner using R410A as a problem may occur due to differences in pressure characteristics of refrig erant or differences in type of lubricating oil air conditioner
19. Connect the wiring according to the number of the indoor terminal block Mis wiring may cause the burning damage and make sure to connect correctly S Sec oprah too 3 Black Indoor outdoor signal wire Low voltage Yellow Green Earth wiring terminal Interconneting wire Notes 1 To prevent the mis operation by noise when the connecting wire too long for indoor and outdoor Please hide the fixed wire in the pipe or use vinyl tape to set Do not put wire into the unit 2 Please let the anchorized personal to decide by indoor wiring code whether connect the leakage breaker or not 5 4 Refrigerant piping 1 Preparation Keep the openings of the pipes covered with tapes etc to prevent dust sand etc from entering them Indoor unit side Outdoor unit side Dimension A Liquid side 06 35 9 1 dia Gas side 9 52 13 2 dia Remove Remove 612 7 16 6 dia Remove the flared nuts Remove the flared nuts Install the removed flared nuts to the pipes to be connected on both liquid and gas sides on both liquid and gas sides then flare the pipes 29 2 Connection of refrigerant piping 3 Indoor unit side Outdoor unit side Connect firmly gas and liquid side Connect firmly gas and liquid side pipings by Torque wrench pipings by Torque wrench Spanner for fixing the piping Torque wrench
20. Flap motor Inspection lamp Varistor 4 way valve coil Magnetic contactor Diode stack Electronic expansion valve Inductor Room temp thermistor Heat exchanger thermistor Indoor unit Humidity sensor Heat exchanger thermistor Outdoor unit Outdoor air temp thermistor Discharge temp thermistor OR OR RD WH BK S GZ0SHHYS I PON 4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4 1 Operation control function by remote control switch Remote controller Models All models Operation section FAN SPEED button Each time the button is pushed the E indicator is switched over in turn HI POWER button This button changes the HI POWER mode AIR FLOW button This button changes the flap mode When pressed this button changes the mode in the following order aes 71 Air i SWING ON TIMER button This button selects ON TIMER operation Clock switch This switch for setting the clock OFF TIMER button This button selects OFF TIMER operation OPERATION MODE select button Each time the button is pushed the E indicator is switched over in turn ON OFF button Press for starting operation press again for stopping ON OFF FAN SPEED ECONOMY button This button changes the ECONOMY mode MITSUBISHI HEAVY INDUSTRIES LTD HI POWER ECONO TEMPERATURE button This button sets the ro
21. HEAT blowing 7 ve Slant forward blowing Flap moves in upward and downward directions continuously 4 5 Comfortable timer setting If the timer is set at ON when the operation select switch is set at the cooling or heating or the cooling or heating in auto mode operation is selected the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time temperature of room temperature thermistor and the setting temperature Max 60 minutes Operation mode Operation start time correction value Min 3 lt Room temp Setting temp 1 lt Room temp Setting temp lt 3 Room temp Setting temp lt 1 At cooling 5 No change 5 gt 3 lt Setting temp Room temp 2 lt Setting temp Room temp lt 3 Setting temp Room temp lt 2 At heating 5 No change 5 Notes 1 At 5 minutes before the timer ON time operation starts regardless of the temperature of the room temperature thermistor Th1 2 This function does not operate when in the Dry or Auto Dry mode However the operation in item 1 does operate in the Auto Dry mode 3 During the comfortable timer operation both the operation lamp and timer lamp illuminate and the timer lamp goes off after expiration of the timer ON setting time Example Heating Corrects the starting time of next operation by c
22. HI Outdoor heat exchanger liquid pipe sensor temperature on second previous occasion AUTO ischarge pipe sensor temperature on second previous occasion MED Error code on third previous occasion Cooling HI Room temperature sensor temperature on third previous occasion AUTO Indoor heat exchanger sensor temperature on third previous occasion 23 LO Remote controller information on third previous occasion MED Outdoor temperature sensor temperature on third previous occasion Heating aa TE HI Outdoor heat exchanger liquid pipe sensor temperature on third previous occasion AUTO ischarge pipe sensor temperature on third previous occasion MED Error code on fourth previous occasion Cooling HI Room temperature sensor temperature on fourth previous occasion AUTO Indoor heat exchanger sensor temperature on fourth previous occasion 24 LO emote controller information on fourth previous occasion MED Outdoor temperature sensor temperature on fourth previous occasion Heating aa z F HI Outdoor heat exchanger liquid pipe sensor temperature on fourth previous occasion AUTO ischarge pipe sensor temperature on fourth previous occasion MED Error code on fifth previous occasion Cooling HI Room temperature sensor temperature on fifth previous occasion AUTO Indoor heat exchanger sensor temperature on fifth previous occasion 25 LO Remote controller information on fifth previous occasion MED Outdoor temperature sensor temperature on fifth previous occasion Hea
23. Installation on indoor unit a Install the indoor unit on the mounting plate Hook the upper part of the indoor unit on the stoppers disposed at the upper part of the mounting plate and lightly push the lower part of the indoor unit so that the unit is fixed in position When removing the indoor unit 1 Disconnect the lid at right and left 2 Pull down the stoppers right and left pro gt vided at the bottom of the indoor unit base gt See the detail view shown at right ene Light push b Be sure not to leave any trap on the drain pipe P a Ya lt 4 Indoor unit base bottom stopper D Inverted slope Trap 2 places at right left eclining slope f X 5 3 Installation of outdoor unit 1 Installation of outdoor unit a Make sure that sufficient space for installation and service is secured b Fix the leg sections of the unit on a firm base which will not play Attach cushion pads etc between the unit and the mounting fixtures not to transmit vibration to the building c Attach a drain elbow etc under the drain port of the bottom plate to guide drain water Drain elbow should not be used where days when temperature drops below 0 C continue for several days Draining may be disturbed by frozen water d When installing the unit at a higher place or where it could be toppled with strong winds secure the unit firmly with foundation bolts wire etc 2 Connection of indoor and outdoor connecting wiring a
24. Refrigerant R410A 1 2 Adoption of R410A in air conditioners In 1974 it was pointed out that the ozone layer in the upper stratosphere about 20 40 km above ground might have been damaged by the ozone depleting substances such as CFC chlorofluorocarbon and HCFC hydrochlorofluorocarbon Since that time many countries across the world have endeavored to take countermeasures against the ozone depletion As a refrigerant belonging to the HCFCs the conventional refrigerant R22 used in air conditioners also tends to deplete the ozone layer Therefore complying with the provisions of the international regulations i e Montreal Protocol concerning the Ozone Depleting Substances and national laws amp Regulations concerned it is necessary to replace R22 with other types of refrigerant which do not deplete the ozone layer A refrigerant composed of hydrogen H fluorine F and carbon C is called an HFC and does not deplete the ozone layer One HFC s is R410A whose pressure is about 1 6 times higher than R22 and whose energy efficiency is almost comparable to that of R22 at the same refrigerant temperature Chemical characteristics of R410A a Chemical stability Like R22 R410A is a chemically stable less toxic and non flammable refrigerant However as in the case of R22 the specific gravity of its vapour is larger than that of air and should it leak in an airtight room it may stay at a low level and cause an oxygen starvation accid
25. and are short J AST s Sel Humidity reading is 100 Operates in the Cooling region a circuited Remark Do not perform a continuity check of the humidity sensor with a tester If DC current is applied it could damage the sensor Humidity sensor assembly b Outdoor unit Thermistor Operation Phenomenon mode Shortcircuit Broken wire Heat exchanger Cooling System can be operated normally System can be operated normally pipe thermistor Heating Defrosting is not performed Defrosting is performed for 10 minutes at approx 1 hour Outdoor temperature Cooling System can be operated normally System can be operated normally thermistor Heating Defrosting is not operated Defrosting is performed for 10 minutes at intervals of approx 1 hour lle pipe All modes Cenc protection is disabled Compressor stop There is no inverter output 47 9 How to make sure of remote controller Remote controller defects Is remote controller normal Again pushing operating switch i Operating the unit Abnormality is not found Does backup switch operates Operating the unit YES Control problem on main unit Replace the display Is the unit operable with remote controller Defective remote controller 10 Inspection procedures of indoor electrical equipment Is fuse 3 15A blown Replace fuse Is voltage applied betw
26. in the past If self diagnosis displays cannot be confirmed it is possible to get a grasp of the conditions at the time trouble occurred by checking these service data i Explanation of terms Term Explanation The service mode is the mode where service data are displayed by flashing of the display lamps Service mode when the operations in item ii below are performed with the indoor controller These are the contents of error displays and protective stops which occurred in the past in the air conditioner system Error display contents and protective stop data from past anomalous Service data operations of the air conditioner system are saved in the indoor unit controller s non volatile memory memory which is not erased when the power goes off There are two types of data self diagnosis data and stop data described below These are the data which display the reason why a stop occurred when an error display self diagnosis display occurred in an indoor unit Data are recorded for up to 5 previous occurrences Data which are older than the Sth previous occurrence are erased Self diagnosis data In addition data on the temperature of each sensor room temperature indoor heat exchanger outdoor heat exchanger liquid pipe outdoor temperature discharge pipe remote controller information operation switching fan speed switching are recorded when trouble occurs so more detailed information can be checked These are
27. is a current safe stop in current safe I mode O flash Compressor loc uring heating operation Fa 3 time 33 Cooling current safe II Overcharge When there is a current safe stop in current safe II mode O flash Compressor loc uring cooling operation 4time 34 Heating current safe II Overcharge When there is a current safe stop in current safe II mode MEN O flash Compressor loc uring heating operation 5 time 35 Cooling current safe IM Overcharge When there is a current safe stop in current safe I mode SER O flash Compressor loc uring cooling operation 6 time 36 Heating current safe III Overcharge When there is a current safe stop in current safe I mode O flash Compressor loc uring heating operation 7 time 37 Heating current safe Overcharge When there is a current safe stop in current safe M 3A O flash M 3A Compressor loc mode during heating operation 38 Number of flashes when in service mode Stop code Error content Error Auto Run Timer or Cause Occurrence conditions display recovery lamp lamp _ Error code 7 10 s digit 1 s digit Major category Minor category 4time 1 time 41 Current Cooling overload 1 Overcharge When there is a current safe stop in overload 1 mode flash flash safe ou
28. length of 15m 0 35 MA68 Microcomputer control E Tangential fan x 1 Propeller fan x 1 Motor w 29 24 i 5 Cooling 8 0 30 Air flow at High Heating CMM 8 7 25 Air filter Q ty Polypropylene net washable x 2 Shock amp vibration absorber Cushion rubber for compressor Electric heater Operation control i i Wireless Remote controller Operation switch Room temperature control Microcomputer thermostat Pilot lamp RUN Green TIMER Yellow HI POWER Green ECONO Orange Safety equipment Compressor overheat protection Heating overload protection High pressure control Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Cooling overload protection ve O D mm in Liquid line 06 35 1 4 Gas line 9 52 3 8 5 Connecting method Flare connecting S D Attached length of piping Liquid line 0 47 m 7 3 2 Gas line 0 40 m Insulation Necessary Both sides Drain hose Connectable Power source cord 2 5 m 3 cores with Earth 1 5 mm x 4 cores Including earth cable Terminal block Screw fixing type Mounting kit Size x Core number Connecting method Accessories included Connection wiring Optional parts Notes 1 The data are measured at the following conditions Item Indoor air temperature Outdoor air temperature j Standa
29. mm g Vacuum pump adapter It is necessary to use an adapter for preventing vacuum pump oil from flowing back to the charge hose The charge hose connecting part has two ports one for conventional refrigerant 7 16 UNF 20 threads per inch and the other for R410A If the vacuum pump oil mineral mixes with R410A a sludge may occur and damage the equipment h Refrigerant cylinder e A refrigerant cylinder exclusive for R410A comes identified with refrigerant name and is coated with pink paint as desig nated by the ARI U S A i Charge port and packing for refrigerant cylinder e According to the charge hose s cap size a charge port with 1 2 UNF 20 threads per inch and corresponding packing are required j Gas leakage detector e A high sensitivity gas leakage detector exclusive for HFC refrigerant is used In the case of R410A the detection sensitivity is about 23g per year General tools a Vacuum pump g Hole core drill 665 or 70 b Torque wrench h Hexagonal wrench opposite side 4 or 5 mm for 1 4 opposite side 17 mm x PN i Spanner or monkey wrench for 1 4 opposite side 17 mm x ae j Tape measure for 3 8 opposite side 22 mm x aes k Thermometer c Pipe cutter 1 Clamping ampere meter d Reamer m Insulation resistance tester mega tester e Screwdriver n Electro circuit tester f Hacksaw o Pipe bender Applicability of R410A tools to R22 model Table 15 Applicability of R410A tools to R22 model Tool
30. oriented dehumidifying Low 3 High Room temperature Setting temperature deg Cooling or heating oriented dehumidifying is selected again one hour after the first selection of the cooling or heating oriented dehumidifying 17 2 Outline of control a Cooling oriented dehumidifying Room temperature is checked at 5 minute intervals after selecting the cooling or heating oriented dehumidifying in order to determine the operation range r Note 1 Figures in the parentheses Operation range D C C B show the values at economical operation Low 1 0 2 High Room temperature Setting temperature deg range range range range Operation pattern 25 35 type 50 50 type 40 25 35 type 38 Inverter speed 50 type 24 25 35 type 30 50 type 15 50 type 4th eat 5th speed 2nd speed Indoor fan 1st speed OFF 50 type 50 type 1st speed 1st speed 1st speed 3rd speed Outdoor fan OFF Determination of cooling oriented dehumidifying operation range Temperature check b Heating oriented dehumidifying After interrupting the compressor operation for 3 minutes by the 3 minute timer following the determination of heating oriented dehumidifying the unit begins in the heating operation If the room temperature exceeds the setting temperature by 2 C or more the unit checks the room temperature at 5 minu
31. outdoor unit as in drawing will reduce the frequency of defrost operation When installing the snow hood take care so that the air outlet of the snow hood will not face directly into the most windy direction ii Design the base higher than possible snow deposit Limitations for one way piping length and vertical S3 Height Must be over the possible snow deposit height A height difference Model SRK25ZD S Item SRK35ZD S pes One way piping length 2 15m 25m g Outdoor Vertical m 10m 15m F unit is lower height difference H Outdoor unit 10m 15m is higher 26 5 2 Installation of indoor unit 1 Installation of installation board a Fixing of installation board Look for the inside wall structures Intersediate support or pillar and firaly install the unit after level surface has been checked 450 ry Y Fixing on concrete wall Use of nut anchor Use of bolt anchor Mounting board 2 Drilling of holes and fixture sleeve Option Parts Adjustment of the installation board in the horizontal direction is to be conducted with four screws in a temporary tightened state Standard hole Adjust so that board will be level by turning the board with the standard hole as the center When drilling the wall that contains a metal lath wire lath or metal plate be sure to us
32. reason for the stop stop code 4 times previous when the air conditioner was stopped by protective stop control 25 C Displays the reason for the stop stop code 5 times previous when the air conditioner was stopped by protective stop control 26 C Displays the reason for the stop stop code 6 times previous when the air conditioner was stopped by protective stop control 27 C Displays the reason for the stop stop code 7 times previous when the air conditioner was stopped by protective stop control 28 C Displays the reason for the stop stop code 8 times previous when the air conditioner was stopped by protective stop control 29 C Displays the reason for the stop stop code 9 times previous when the air conditioner was stopped by protective stop control 30 C Displays the reason for the stop stop code 10 times previous when the air conditioner was stopped by protective stop control iii Error code stop code table Assignment of error codes and stop codes is done in common for all models Number of flashes when in service mode Stop code Error content Error Auto Run Timer or Cause Occurrence conditions display recovery lamp lamp Error code 10 s digit 1 s digit Major category Minor category OFF OFF 0 Normal 1 time 1 time 1 Current Compressor Software Start Compressor lock Compressor start fails 42 times in success
33. than 5 2 MPa 52 kg cm G e Generally a setting fixture is provided only on one end 4 Gauge manifold Hose ai The most important service tool for refrigeration and air conditioner packing W ais e Widely used when charging recovering R410A while checking gas pressure Compound gauge Pressure gauge Gauge manifold Charge hose Stop valve 5 Tube piercing valve a A tool used to make a hole for recovery in the copper pipe when recovering R410A from equipment which has no port for charging or recovering gas Various types are available on the market and given various names b As the piercing edge tends to wear it is necessary to treat this valve as semi expendables c As vacuum rises air tends to be inhaled from the hole So care must be exercised Piercing valve 6 Vacuum pump Used to evacuate the recovering equipment and recovering cylinder Exhaust port Suction port INVERTER WALL MOUNTED TYPE ROOM AIR CONDITIONER A MITSUBISHI HEAVY INDUSTRIES LTD Air Conditioning amp Refrigeration Systems Headquarters 16 5 2 chome Kounan Minato ku Tokyo 108 8215 Japan Fax 03 6716 5926 No 044 1 1A RO
34. to run the air conditioner subjected to refrigerant recovery perform pump down operation so that refrigerant is contained in the outdoor unit condenser side e Carry out the pump down operation after confirming the specification of the air conditioner subjected to refrigerant recovery If there is any clogging part ex the electronic expansion valve etc fully open such part Gauge manifold Air conditioner subjected to recovery Refrigerant recovering equipment Recovering cylinder Connection of refrigerant recovering equipment a Connect the air conditioner subjected to refrigerant recovery to the refrigerant recovering equipment When there is a service port port for recovery Make connection to the service port port for recovery by using a gauge manifold and charge hose When there is no service port port for recovery Make connection in a manner similar to Q above by using a piercing valve b Connect the refrigerant recovering equipment to the recovering cylinder 64 4 Recovering procedures a According to the instructions for handling the refrigerant recovering equipment described in the attached instruction manual operate the equipment to recover refrigerant b During the operation take care of the following cautions Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency
35. 0 2 Ifthe temperature of 125 110 C is detected by the thermistor on the discharge pipe then the compressor will stop immediately Simultaneously the red LED on the printed circuit board of outdoor unit controller flashing 5 times for 0 5 second at interval of 8 seconds When the discharge pipe temperature drops and the time delay of 3 minutes is over the unit starts again within 1 hour but there is no start at the third time 14 Serial signal transmission error protection a Purpose Prevents malfunction resulting from error on the indoor gt outdoor signals b Detail of operation When the indoor unit controller lt outdoor unit controller signals cannot be received the compressor is stopped immediately Simultaneously the red LED on the printed circuit board of outdoor unit controller flashing 6 times for 0 5 second at intervals of 8 seconds Once the operation stops it does not start any more Timer lamp on the indoor unit flashing at the same time 15 High pressure control a Purpose Prevents anomalous high pressure operation during heating b Detector Indoor unit heat exchanger thermistor Th2 c Detail of operation Example Fuzzy 8 rps After lapse of 20 Sec or over ae After lapse of 20 Sec or over Lower limit speed 20 35 rps After lapse of 20 Sec or over A B Indoor unit heat exchanger temperature C Notes 1 When the indoor unit heat exchanger te
36. 2 3 The following procedures for refrigerant recovery represent general procedures and they may differ between actual cases depend ing upon the type of refrigerant recovering equipment The connecting and handling methods for different type of refrigerant recovering equipment may also differ So ascertain the details by referring to the respective instruction manuals etc Checks prior to recovering procedures a Checking the refrigerant recovering equipment Q Gas leakage If there is any malfunction repair it Oil separator Drain the residual oil Recovering equipment weighing function overcharge preventing function float switch moisture indicator drier and other accessory functions should be adjusted or replaced where necessary Electrical circuit b Checking the accessories to the refrigerant recovering equipment Preparations for recovering procedures a Installation of refrigerant recovering equipment Install the equipment in a place which satisfies the following requirements as much as possible Ambient temperature is higher than 0 C and lower than 40 C A flat and dry floor A place as close to the air conditioner as possible b Preparation of recovering cylinder A recovering cylinder should be such that it does not go against prohibitions and is suitable for refrigerant recovered c Connect to the power source d Preparations for air conditioner subjected to refrigerant recovery When it is possible
37. 2 0 60 1 2 12 70 0 70 5 8 15 88 0 80 Socket Socket with different diameter 90 elbow A type Tee Tee with different diameter Fig 2 Socket joints 7 2 2 Processing of piping materials When performing the refrigerant piping installation care should be taken to ensure that water or dust does not enter the pipe interior that no other oil other than lubricating oils used in the installed air conditioner is used and that refrigerant does not leak When using lubricating oils in the piping processing use such lubricating oils whose water content has been removed When stored be sure to seal the container with an airtight cap or any other cover 1 Flare processing procedures and precautions a Cutting the pipe By means of a pipe cutter slowly cut the pipe so that it is not deformed b Removing burrs and chips If the flared section has chips or burrs refrigerant leakage may occur Carefully remove all burrs and clean the cut surface before installation c Insertion of flare nut 54 d Flare processing Make certain that a clamp bar and copper pipe have been cleaned By means of the clamp bar perform the flare processing correctly Use either a flare tool for R410A or conventional flare tool Flare processing dimensions differ according to the type of flare tool Be careful When using a conventional flare tool be sure to secure dimension A by using a gage for size
38. 2rps 15 120rps Air flow 8th speed fixed 6th 7th speed MED Inverter command speed 30 72rps 30 76rps 15 62rps Air flow 6th speed fixed 4th 5th speed Lo Inverter command speed 30 42rps 30 46rps 15 38rps Air flow 4th speed fixed 3rd speed fixed b When the defrosting protection device etc is actuated operation is performed in the corresponding mode c Outdoor unit blower operates in accordance with the inverter command speed 3 Details of control at each operation mode pattern Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in accordance with the fuzzy rule and used for control of the air capacity and the inverter speed If the speed obtained with the fuzzy calculation drops below 24 rps during the heating fuzzy operation the operation a Fuzzy operation b Heating thermostat operation Operating conditions changes to the heating thermostat operation Detail of operation Model It SRK25ZD S 35ZD S SRK50ZD S em Inverter speed Orps Comp stopped 10 rps 10sec Orps Comp stopped Indoor fan Hot keep normal mode 1st speed Outdoor fan Stop 2nd speed 1min gt stop Flap Horizontal c Hot keep operation If the hot keep operation is selected during the heating operation the indoor blower is controlled based on the temperature of the indoor unit heat exchanger detected with Th2 indoor unit heat exchanger thermis
39. 5 46 47 48 49 indefor od seeded 3 30 31 32 33 34 35 36 37 38 39 2 20 21 22 23 24 25 26 27 28 29 1 10 11 12 13 14 15 16 17 18 19 0 an ee ee oe ee 0 Go ae aa el Sees si Bes 1 io 11 12 13 14 15 16 17 18 19 2 20 21 22 23 24 25 26 27 28 29 3 30 31 32 33 34 35 36 37 38 39 No 4 40 41 42 43 44 45 46 47 48 49 does not sound 5 50 51 52 53 54 55 56 57 58 59 6 60 61 62 63 64 69 7 70 78 nanl 79 8 80 81 82 83 84 89 9 90 91 92 93 94 99 If no data are recorded error code is normal the display for each sensor becomes as shown below Sensor name Sensor value displayed when the error code is normal Room temperature sensor temperature 19 C Indoor heat exchanger sensor temperature 64 C Outdoor temperature sensor temperature 64 C Outdoor heat exchanger liquid pipe temperature 64 C Example Room temperature indoor heat exchanger outdoor temperature outdoor heat exchanger liquid pipe 9 C ON Buzzer sound 0 1 sec If the temperature is lt 0 the buzzer sounds If the temperature is 2 0 the buzzer does not sound minus OFF 1 5 sec fl nee ON Run lamp 10 s digit OFF 0 5 sec 0 5 sec ON Timer lamp 1 s digit OFF 11 second inter
40. 6 MAINTENANCE DA A sssassnssnnneennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nanne mnnn n nnmnnn nna 6 1 Troubleshooting procedures for electrical equipment 000 PrE ao aTe Pe E E E E 7 REFRIGERANT PIPING INSTALLATION SERVICING MANUAL FOR AIR CONDITIONERS USING R410A nsssaannnsnsunnnnnnnnnnnennnnnnnnnnnnnnnnnnnnnn Tea OL oe e E E EEE E TTT 7 2 Refrigerant piping installation ccccccecessseeeeeeeeeeeeeeeeeeeeeeeeeeseeeeseeeeees 7 3 Installation removal and servicing ceeeeeseeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeees 7 4 Refrigerant recovery sssssseessssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn ees 1 GENERAL INFORMATION 1 1 Specific features The Mitsubishi Daiya room air conditioner SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory The indoor unit is composed of room air cooling or heating equipment with opera tion control switch and the outdoor unit is composed of condensing unit with compressor 1 Inverter Frequency converter for multi steps power control Heating Coo
41. A 18 K j _ 2 a Remote controller y D R ec oe ne si 1 M 788 A oh s leo 60 14 5 of Piping for Gas 67 5 25 35 09 52 4 50 12 7 397 1 Ka A t Piping for Liquid 465 1 6 35 Drain hose 540 16 Piping hole 65 Piping hole 665 VIEW A 2 Outdoor unit Models SRC25ZD S 35ZD S Unit mm Drain holes Terminal block INVERTER 4 139 3 MITSUBISHI HEAVY INDUSTRIES ETD Service valve Liquid Flare connection 46 35 1 4 33 3 Service valve Gas Flare connecting 99 52 3 8 Model SRC50ZD S 286 4 Drain hole 50 290 49 6 lt Elogated hole 2 12x16 Terminal block INVERTER ae MITSUBISHI HEAVY INDUSTRIES LTD Ground terminal 2 4 Piping system Models SRK25ZD S 35ZD S Indoor unit Outdoor unit _ Cooling cycle 5 72T Heating cycle I Outdoor air Service valve gt N temp thermistor Flare wy Piping Gas 99 52 Room temp thermistor Heat exchanger Heat exchanger thermistor Piping Liquid 96 35 Flare connecting Model SRK50ZD S Indoor unit Gas Check joint 4 way valve 4 i 1 Heat exchanger Heat Dione BX
42. D S_ Length 15m Factor by air temperatures Power source Outdoor unit Meaning of marks Parts name Parts name 1 Phase i a i g 220 230 240V 50Hz BR BL Y GN HEAT i t EXCHANGER p n 52C4 52C3 N J 52C i ia 20 pt RD 1 be BK 3 F1 Pri foo WH 250V rinted circuit board FM 4 3 15A i 1 Y BL j 6 1 CNU A Z ZNR 4 1 CNM CNE CNG j i a eS j F 4 4 I sE Color symbol Dia BK Black splay BR Brown 07777TTY RD ho Wireless Thl Th2 BL Blue R Amp WH White Y GN Yellow Green Parts name Compressor motor Fuse Fan motor Indoor Fan motor Outdoor Flap motor Reactor Room temp thermistor Heat exchanger thermistor Indoor unit Heat exchanger thermistor Outdoor unit Outdoor air temp thermistor 4 way valve coil Diode stack Discharge temp thermistor Varistor Magnetic contactor Electronic expansion valve U V W F l Printed circuit board CNA CND a 29 CNE S ZSE S GZSZ7NYS SI POWN 1 311 99 3 LE Bum viva IVOIYLOATSA
43. Fuzzy operation During the fuzzy operation the air flow and the inverter speed are controlled by calculating the difference between the room temperature setting correction temperature and the suction air temperature Cooling thermostat operation i Operating conditions During the cooling fuzzy operation or when the speed obtained by the fuzzy calculation is less than 24 rps ii Detail of operation Model Item SRK25 35ZD S SRK50ZD S Inverter speed 0 rps Comp stopped 10rps 10sec Orps Comp stopped Indoor fan Corresponds to fan speed switch Outdoor fan Stop 2nd speed 1min gt stop Cooling HI POWER operation HI POWER button on remote controller ON The unit is operated continuously for 15 minutes regardless of the setting temperature i Detail of operation Model Item SRK25ZD S SRK35ZD S SRK50ZD S Inverter speed 62 70 84 Indoor fan 7th speed 7th speed Outdoor fan 4th speed 2nd speed Notes 1 Protective functions will actuate with priority even during the HI POWER operation 2 Room temperature is not adjusted during the HI POWER operation 4 8 Outline of dehumidifying operation 1 After operating the indoor blower for 20 seconds from immediately after the start of operation the indoor temperature is checked and based on the result of check the cooling oriented dehumidifying or heating oriented dehumidifying is selected Heating oriented dehumidifying Cooling
44. Manual No 04 SRK T 039 TECHNICAL MANUAL Collection data INVERTER WALL MOUNTED TYPE ROOM AIR CONDITIONER Split system air to air heat pump type Alternative refrigerant R410A use models SRK25ZD S 35ZD S 50ZD S AR MITSUBISHI HEAVY INDUSTRIES LTD CONTENTS 1 GENERAL INFORMATION cocccetcccged ceca occ t i wenden abet ecced Acad ence 1 1 Specific features cis cecscshsscde cashes eleke Scat se cade Sis cea catciest eases cies 1 2 How to read the model Name ssseeeeeeeeeeeeeeeeeeeeseeneeeeeeneeeeeeeeeeeees 2 SELECTION DATA ccccis cheese carretera ee ennnen 2 1 Specifications ssssssnnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nunne nnmnnn nnmnnn nna 2 2 Range of usage amp limitations cccccceeceeeeeeeseeeeeeeeeeeeeeeeeeeeneeeeeseeneees 2 3 Exterior dimensions sssssssssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnana nna 2 4 Piping system ssssssssnnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnn nnmnnn 2 5 Selection chart sssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnana 3 ELECTRICAL DATA ssssssssnnnnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn ennnen 3 1 Electrical wiring sssssssssnnnneeennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnmnnn nna 4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4 1 Operation control function by remote control switch
45. Power source Outdoor unit 1 Phase B 1 g 220 230 240V 50Hz F2 250V 15A BR BL a Y GN HEAT pm L tot L G3 CNO 1 N 1 L 1 EXCHANGER a fa 52C3 N J 1 52C i PWB1 i eo OF 1 a 20 y rie Ops HH se l RL BK 3 ani Printed circuit board 20S CNB Noun L OUT2 2u 4 3 15A i SWITCHING GR JBL Y 5 j POWER ae CIRCUIT BL 5 U GR BL CNU Ths Cam CND a a AC NJAC L i Z ZNR lt i i Th6 Law m ES 1 DS 7 CNM AF LI CNE CNG CNF jt cny CNH CNH EEE H PWB2 ae Color symbol os z s H DC N DC P Ni E BK Black BK RD Ic12 BR Brown Display Th3 N2 P2 RD Re O BKN 3 GR Green Wireless Thi Th2 bg BL Blue i RD P_1 U OR Orange aay N P WH White Power P Y GN Yellow Green transistor Y Meaning of marks Parts name Parts name Parts name Capacitor for FMo Compressor motor Fuse Fan motor Indoor Fan motor Outdoor
46. S C9612 Heating 20 C TE 6 C ISO T1 JIS C9612 The piping length is 7 5m 2 The operation data are applied to the 220 230 240V districts respectively 3 The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping Purging is not required even for the short piping Model SRK50ZD S Indoor unit SRC50ZD S Outdoor unit ae Mogel SRK50ZD S SRC50ZD S Cooling capacity Ww 5000 Heating capacity w 6300 Power source 1 Phase 220 230 240V 50Hz Cooling input kW 1 66 Running current Cooling A 7 6 7 3 7 0 Heating input kW 1 96 S Running current Heating A 9 0 8 6 8 2 Z Inrush current A 9 0 8 6 8 2 2 COP Cooling 3 01 Heating 3 21 3 Cooling Sound level Hi 48 Me 42 Lo 26 48 e f Power level 61 61 Noles level z Sound level ca Hi 46 Me 40 Lo 34 49 nesting Power level 62 64 p Rae mm 250 x 815 x 249 640 x 850 x 290 Color Cool white Stucco white Net weight kg 9 0 43 Refrigerant equipment Can asso noe Ley p 5CS102XFA Scroll type x 1 Motor kW 1 5 Starting method Line starting Heat exchanger SLIT fin Louver fins amp inner grooved tubing Refrigerant control Capillary tubes Electronic expansion valve Refrigerant kg R410A_ 1 35 Pre Charged up to the piping length of 15m Refrigerant oil 2 0 36 RB68A Deice
47. TA 6 1 Troubleshooting procedures for electrical equipment 1 2 3 Cautions If you are disassembling and checking an air conditioner be sure to turn off the power before beginning When working on indoor units let the unit sit for about 1 minute after turning off the power before you begin work When working on an outdoor unit there may be an electrical charge applied to the main circuit electrolytic condenser so begin work only after discharging this electrical charge to DC 10 V or lower When taking out printed circuit boards be sure to do so without exerting force on the circuit boards or package components When disconnecting and connecting connectors take hold of the connector housing and do not pull on the lead wires Items to check before troubleshooting Have you thoroughly investigated the details of the trouble which the customer is complaining about Is the air conditioner running Is it displaying any self diagnosis information Is a power supply with the correct voltage connected Are the control lines connecting the indoor and outdoor units wired correctly and connected securely Is the outdoor unit s refrigerant service valve open Troubleshooting procedure If the air conditioner does not run at all If the air conditioner does not run at all diagnose the trouble using the following troubleshooting procedure If the air conditioner is running but breaks down proceed to troubl
48. air flow stop due to the HOT KEEP TIMER light yellow Illuminates during TIMER operation HI POWER light green Illuminates during HI POWER operation ECONOMY light orange Illuminates during ECONOMY operation When the remote controller batteries become weak or if the remote controller is lost or malfunctioning this switch may be used to turn the unit on and off a Operation Push the switch once to place the unit in the automatic mode Push it once more to turn the unit off b Details of operation The unit will go into the automatic mode in which it automatically determines from room temperature as detected by sensor whether to go into the cooling thermal dry or heating modes Operation ie Fan speed Flap Timer switch Cooling About 25 C Thermal dry About 25 C Auto Auto Continuous Heating About 26 C ON OFF button 4 3 Power blackout auto restart function 1 Power blackout auto restart function is a function that records the operational status of the air conditioner immediately prior to it being switched off by a power cut and then automatically resumes operations at that point after the power has been restored 2 The following settings will be cancelled a Timer settings b High power operations Notes 1 The power blackout auto restart function is set at on when the air conditioner is shipped from the factory Consult with your deale
49. al if there is approximately DC 5 V 10 seconds mum MUIA mine MUIA MIAE MAIA MUHE MAIL UIA WHIL MUI WILO MIN MIE M UIE mi maa unit is stopped Brown to Yellow after the power asupply is turned on Brown to Blue If the expansion valve does not operate as shown above it is defective Color symbol A E Wil el dese RD Red WH White Th4 Th5 Th6 Y GN Yellow Green Re CND G CNB CNE CNA WW MI ME Et ed amp Printed circuit Inspection of input to PCB RIN board Check the voltage between terminals on the terminal block It is normal if AC 220 230 240V is detected U7 LLL LLL LLL F2 250V 20A m OSIN wn wit M ene eae tet MN MIN UIE MI HI 1I UN transistor A Inspection of serial signal Check the voltage between terminals on the terminal block It is normal if the needle swing in the range of DC 0 Approx 12V LLL LLL LLL wn ih Mee UE MI UIN 1M LLL BK WH RD Ff we pe pe YIGN os Check point of outdoor unit SRC50ZD S unit is stopped Color symbol BK BR RD GR BL OR WH Y GN
50. alculating the temperature difference Setting temperature Ifthe difference Setting temperature Room tempera ture is 4 C the correction value is found to be 5 min utes from the table shown above so that the starting time of next operation is determined as follows Room temperature 15 min earlier 5 min 20 min earlier Current operation Correction value 1 Operation starting time start time 5 min earlier 13 10 min earlier 15 min earlier Time Setting time 4 6 Outline of heating operation 1 Operation of major functional components in heating mode Item Functional When the inverter When the inverter speed When the inverter speed is Orps components speed is Orps is other than Orps due to an anomalous stop Indoor fan motor ON ON OFF Flaps ON or OFF ON or OFF Stop position control Display Lights up Lights up Lights up or flashes 52C ON ON OFF after stop mode Outdoor fan motor Dipin i in eka 50 type ON ney as tote R 50 type 4 way valve ON Electronic expansion valve 2 Air flow selection Depending on the stop mode Depending on the EEV control a Speed of inverter changes within the range of selected air flow Depending on the stop mode Air flow selection ote SRK25ZD S SRK35ZD S SRK50ZD S Auto Inverter command speed 30 102rps 15 120rps Air flow Depends on inverter command speed Hi Inverter command speed 30 10
51. also been changed to an HFC resistant type and as in the case of each port of the manifold the hose cap size has been changed Furthermore for prevention of gas pressure reaction a charge hose with a valve placed near the cap is also avail able Table 13 Differences between conventional charge hose and that for R410A Conventional charge hose Charge hose for R410A Pressure Normal pressure 3 4 MPa 34 kgf cm 5 1 MPa 51 kgf cm resistance Breaking pressure 17 2 MPa 172 kgf cm 27 4 MPa 274 kgf cm HNBR rubber Engineering material NBR rubber internally coated with nylon Cap ize 7 16 UNF 1 2 UNF Ps 20 threads per inch 20 threads per inch c Electronic balance for refrigerant charging e As R410A belonging to the HFCs features high pressure and high evaporating speed when R410A is charged by using a charging cylinder R410A in the cylinder cannot be kept in a liquefied state and gasified refrigerant bubbles in the charging cylinder it becomes difficult to read values Therefore it is advisable to adequately use an electronic balance for refrigerant charging e An electronic balance for refrigerant charging has higher strength due to its structure with four points of support for refrig erant cylinder weight detection As the charge hose connecting part has two ports one for R22 7 16 UNF 20 threads per inch and the other for R410A 1 2 UNF 20 threads per inch it can also be used for chargi
52. by opening the gauge manifold s valve Lo charge the liquid refrigerant D Before handling the electronic balance refer to its instruction manual e When the designated amount of refrigerant could not be charged make additional charging bit by bit by cooling operation for the amount of each addition follow the instruction manual prepared by the equipment manufacturer If the first additional charging was not enough make the second additional charging after about one minute in the same manner as the first addi tional charging Caution Be sure never to charge a large amount of liquid refrigerant at once to the unit in cooling mode since liquid is charged from the gas side 62 f After charging liquid refrigerant into the air conditioner by closing the charging valve stop operation by fully closing the gauge manifold s valve Lo g Quickly remove the charge hose from the service port When stopped halfway refrigerant being cycled will be released h After securing the caps on the service port and control valve check the caps periphery to see if there is any gas leakage O Outdoor unit E Refrigerant cylinder with syphon Service port Electronic balance for refrigerant charging Fig 7 Configuration of additional refrigerant charging 7 3 3 Removal When using new refrigerant piping 1 Removing the unit a Recovery of refrigerant from the outdoor unit by pump down e
53. cables and signal lines are improperly wired communications signals from either the outdoor unit or O SNE have recovered Indoor or outdoor unit circuit board is faulty the indoor unit being detected correctly 1 time 61 Connection lines between the Connection Une neg the indoor and When 10 seconds passes after the power is turned on without communications O flash indoor and outdoor units are faulty Indoor or outdoor unit circuit boards are faulty signals from the indoor or outdoor unit being detected correctly 2 time 62 Serial transmission error EFAN outdoor unit circuit boards When minute 50 seconds passes without communications signals O flash Noise is causing faulty operation from either the outdoor unit or the indoor unit being detected correctly G times O 7 time 1 time 71 Rotor lock Less than 16 rps Compressor is faulty After the compressor starts when the compressor stops at flash flash Compressor output is open phase ess than 16 rps due to rotor lock Electronic expansion valve is faulty O Overload operation Outdoor unit circuit board is faulty 2 time 72 16 rps or higher Compressor is faulty When the compressor stops at 16 rps or higher speed due flash Compressor output is open phase to rotor lock Electronic expansion valve is faulty O Overload operation Outdoor unit circuit board is faulty 3 time 73 Phase switching defects Compressor is faulty When compressor start fails 42 times in succession an f
54. ces Outer pipe diameter Minimum insertion depth Clearance D B A D x 1 2 mm mm mm 5 8 6 0 05 0 35 8 12 7 0 05 0 35 12 16 8 0 05 0 45 When joining the pipes either the pipe ends are processed or pipes are connected by brazing with a socket joint Brazing filler metal a b c Alloy brazing filler An alloy mainly composed of silver and copper is used to join iron copper or copper alloy Although it excels in solderability it is relatively expensive Phosphor bronze brazing filler Phosphor bronze brazing filler is generally used to join copper or copper alloy Low temperature solder An alloy of tin and lead An ordinary type of solder Since it is weak in adhesive strength it should not be used for refrigerant pipe brazing Cautions 1 BCuP tends to react with sulphur and produce a fragile compound water solution which may cause a gas leakage So use any other type of brazing filler at a hot spring resort etc and coat the surface with a paint 2 When performing brazing again at the time of servicing use the same type of brazing filler 57 3 Flux a b c Reasons for the use of flux By removing the oxide film and any foreign matter on the metal surface it assists the flow of brazing filler In the brazing process it prevents the metal surface from being oxidized By reducing the brazing filler s surface tension the brazing filler adheres bette
55. control Microcomputer control EGER OH Tangential fan x 1 Propeller fan x 1 Motor w 29 45 Cooling 11 5 42 Air flow at High Heating CMM 13 0 42 Air filter Q ty Polypropylene net washable x 2 Shock amp vibration absorber Cushion rubber for compressor Electric heater Operation control r Wireless Remote controller Operation switch Room temperature control Microcomputer thermostat Pilot lamp RUN Green TIMER Yellow HI POWER Green ECONO Orange Safety equipment Compressor overheat protection Heating overload protection High pressure control Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Cooling overload protection 5 O D mm in Liquid line 66 35 1 4 Gas line 612 7 1 2 S Connecting method Flare connecting Attached length of piping Liquid line 0 47 m 32 Gas line 0 40 m gt Insulation Necessary Both sides Drain hose Connectable Power source cord 2 5 m 3 cores with Earth Connection wiring Size x Core number 1 5 mm x 4 cores Including earth cable Connecting method Terminal block Screw fixing type Accessories included Mounting kit Optional parts Notes 1 The data are measured at the following conditions Item Indoor air temperature Outdoor air temperature Standards Operation DB WB DB WB Cooling 27 C 19 C 35 C 24 C ISO T1 JIS C9612 Heating 20 C TE 6 C ISO T1 JIS C9612
56. d in Table 3 see on page 53 and contains less contaminants As the bare copper pipe surface is naked it is necessary to treat it with exceeding care and adopt a means for identification to prevent improper usage by making it easily discriminable from other piping materials Precautions before installation Observe the following precautions when performing the piping connection at the site a b c Keep any open ends of pipes be sealed with a cap etc until connected with the equipment Exercise great care when performing piping installation on a rainy day When water enters into the piping the lubricating oil may deteriorate and cause the equipment to fail Carry out the piping connection in as short a time as possible If the piping is left open for a long period fully purge the interior with nitrogen gas or dry it with a vacuum pump 7 2 4 Brazing 1 2 Processing the connected parts As brazing is molten between the joined surfaces to yield high adhesive strength it is necessary to secure a wide enough space to be joined and also an adequate clearance between the joined surfaces Copper pipe joints minimum insertion depths outer pipe diameters and clearances between outer and inner pipe diameters are as shown in Table 10 In the case of bronze brazing filler when the clearance is about 0 05 0 1mm the pipes can be connected most strongly Table 10 Copper pipe joints minimum insertion depths and clearan
57. e defective indoor outdoor unit PCB error on power supply system Does error persist after power reset Is there any wrong connection on indoor outdoor unit wiring Is DC 0 Approx 12V detected between terminals on indoor unit terminal block Is DC 0 Approx 12V detected between terminals on outdoor unit terminal block Is AC 220 230 240V applied between 1 on the outdoor side terminal block Is there any problem on the power supply line fuse reactor capacitor etc Defective outdoor unit PCB Indoor fan motor error Trouble by transient cause not unit trouble Correct improper wire connection on indoor outdoor unit Defective indoor unit PCB Defective indoor unit PCB Check crossover wires Replace fuse reactor or capacitor Defective fan motor defective PCB Is connector connection good YES Is voltage applied to fan motor YES Correct connector connection Defective indoor unit PCB Rotor lock Compressor defect outdoor unit circuit defect d Is output voltage applied to all 3 phases of power transistor YES Inspect compressor Check compressor wiring visually Check insulation resistance 1 MQ or over Check coil wire resistance Few Q 46 Defective inverter If check results are normal compressor is locked Outdoor fan motor
58. e pipe hole sleeve sold separately a Drilla hole with 65 whole core drill b Adjusting sleeve length Bgl 5 Indoor side N Outdoor side Note 1 Drill a hole with incline of 5 degree from indoor side to outdoor side Cut off the sleeve collar in case of drawing piping out to rear Cut off the sleeve collar that can be seen from beneath the unit Wall thickness 1 5 cm c Install the sleeve Inserting sleeve Sleeve Inclined Sealing plate Indoor side Oe Paste Outdoor side Turn to tighten View of sleeve when installed Inclined flange Sleeve Sealing plate Indoor side Outdoor side y ae 3 Preparation of indoor unit a Mounting of connecting wires 1 Remove the lid R 2 Remove the terminal cover 3 Remove the wiring clamp 4 Connect the connecting wire securely to the terminal block Use cables for interconnection wiring to avoid loosening of the wires CENELEC code for cables Required field cables HOS RNR3GI1 5 Example or 245IEC57 H Harmonized cable type 05 300 500 volts R Natural and or synth rubber wire insulation N Polychloroprene rubber conductors insulation R Standed core 4or5 Number of conductors G One conductor of the cable is the earth conductor yellow green 1 5 Section of copper wire mm Terminal block y A Connect the connection wire sec
59. eat exchanger During cooling or dehumidifying a Operating conditions i ii b Detail of anti frost operation Indoor heat exchanger temperature detected with Th2 is lower than 5 C Inverter command speed 10 minutes after reaching the inverter command speed except 0 rps Indoor heat exchanger Item emperature 5 C or lower 20 rps 2 5 C or lower Type 50 15rps Indoor command speed 20 rps Type 50 15 rps Orps Indoor fan Depends on operation mode 25 35ZD Max 2nd O rps 50ZD Max 3rd Outdoor fan Depends on operation mode 2 5 5 8 OFF 4 way valve c Reset conditions 20 rps Type 50 15 rps After 5 minutes of operation OFF Indoor heat exchanger temperature C Depends on stop mode the indoor heat exchanger temperature Th2 is 8 C or higher 19 2 3 4 5 6 Indoor fan motor protection When the air conditioner is operating and the indoor fan motor is turned ON if the indoor fan motor has operated at 300 rpm or under for more than 30 seconds the unit enters first in the stop mode and then stops the entire system Timer lamp illuminates simultaneously and the operation lamp flashing 6 times at each 8 second Dew condensation prevention control Cooling including automatic cooling oriented dehumidifying operation SRK50ZD S a Operating conditions When the following conditions are met after 20 minutes or more of con
60. ed again within one hour after the stop of automatic operation or when the automatic operation is selected during heating cooling or dehumidifying operation the unit is operated in the previous operation mode Setting 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 setting temperature Signals of wireless remote controller Display 6 5 4 3 2 1 0 1 2 3 4 5 6 Setti Cooling 19 20 21 22 23 24 25 26 27 28 29 30 31 ettin 9 Dehumidifying 19 20 21 22 23 24 25 26 27 28 29 30 31 temperature Heating 20 21 22 23 24 25 26 27 28 29 30 31 32 4 10 Economical operation ECONO button on remote controller ON 1 2 The set temperature is raised by 1 5 C 0 5 C every one hour at cooling operation and lowered by 2 5 C Steps of 1 C 1 C and 0 5 C every one hour at heating operation to continue the operation with the following contents Detail of operation Model Item SRK25ZD S SRK35ZD S SRK50ZD S Operation mode Cooling Heating Cooling Heating Cooling Heating Inverter command speed 20 52rps 30 72rps 20 58rps 30 76rps 15 60rps 15 62rps Indoor fan 2nd 5th speed 4th 6th speed 2nd 5th speed 4th 6th speed 3rd 5th speed 4th 5th speed Outdoor fan 3rd speed Ist speed 4 11 Protective control function 1 Frost prevention for indoor h
61. een Replace PCB terminals on terminal Replace PCB block AC 220 230 240V Is DC 0 12V detected between terminals on terminal block Indoor electrical equipment are normal Notes 1 Since the communication timing signal is transmitted only when the 52C is turned ON check it under the operating condition 2 Check the voltage on the terminal block Power supply Between AC 220 230 240V Signal Between Changing between DC 0 Approx 12V Note 1 Check method of remote controller a Press the reset switch of the remote controller b Ifall LCD are displayed after zero 0 display it is basically normal HI POWER ECONO AUTO my am pm PAN HIT OA hk Delt Tay m E Kc 48 17 CALC CLEC LLC LECLERC LLCS Inspection of electronic expansion valve To test if there is voltage Voltage is only applied to the electronic expansion valve when the valve opening is being changed Red to White LS Inspection of resistance value of discharge pipe thermistor Remove the connector and check the resistance value See the section of Thermistor characteristics on page 44 Check point of outdoor unit SRC25ZD S 35ZD S Z CAUTION HIGH VOLTAGE High voltage is produced in the control box Don t touch MIN MI HI an 1M MH H I HIN IN E M HI ME MI UNE MIE IN UM electrical parts in the control box for 5 minutes after the Red to Orange Norm
62. efrigerant from being charged accidentally the service port diameter of the outdoor unit control valve 3 way valve has been changed Also to increase the pressure resisting strength flare processing dimensions and sizes of opposite sides of flare nuts for copper pipes with nominal diameters 1 2 and 5 8 have been changed During installation service therefore prepare tools exclusive for R410A shown in 1 on page 60 and general tools shown in 2 on page 61 59 1 Tools exclusive for R410A a Gauge manifold e As R410A is characterized by high pressure conventional tools cannot be used Table 11 Differences between conventional high low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure gauge red 0 1 3 5MPa 76 cmHg 35 kgf cm 0 1 5 3MPa 76 cmHg 53 kgf cm Compound gauge blue 0 1 1 7MPa 76 cmHg 17 kgf cm 0 1 3 8MPa 76 cmHg 38 kgf cm In order to prevent any other refrigerant from being charged accidentally each port of the manifold has been changed in shape Table 12 Differences in port size between conventional manifold and that for R410A Conventional manifold Manifold for R410A Port s 7 16 UNF 1 2 UNF ESR 20 threads per inch 20 threads per inch b Charge hose e As R410A is characterized by high pressure the pressure resistance of the charge hose has been increased The material has
63. ent It may also should it come in direct contact with fire cause a poisonous gas to occur so be sure to handle it only in a well ventilated area b Composition changes Pseudo azeotropic characteristics R410A is a pseudo azeotropic mixed refrigerant composed of two constituents R32 and R125 Quasi azeotropic condition refers to a state in which the dew point curve and boiling point curve gas liquid equilibrium curves pressure constant almost lie on top of each other and a multi constituent refrigerant having this chemical characteristic incurs less composition changes even when evaporation or condensation as a phase change occurs Consequently even when refrigerant leaks from the gas phase somewhere in the piping installation the composition of circulated refrigerant incurs less changes Therefore R410A can be treated in almost a same manner as a mono constituent refrigerant like R22 is treated When actually charging R410A however do so from the liquid phase side by taking into account the phenomenon that when put in a cylinder the composition changes a little between gas and liquid phases c Pressure characteristics As shown in Table 2 since R410A s vapor pressure is about 1 6 times higher than that of R22 at the same temperature perform installation service with special tools and materials which are exclusive for R410A and can withstand high pressure
64. eration and the compressor stops a O Indoor heat exchanger sensor short circuit 7 time 87 Compressor overheating Refrigerant is insufficient When compressor overheating protective control operates flash protection control Discharge pipe sensor is faulty and the compressor stops Operating valve is closed 8 time 88 Refrigeration cycle system Operating valve is closed When refrigeration cycle system protective control flash stive c Refrigerant is insufficient operates O protective control 8 pi 39 Notes 1 The number of flashes when in the Service Mode do not include the 1 5 second period when the lamps light up at first starting signal See the example shown below ON OFF AE e Run lamp 10 s digit ON Timer lamp 1 s digit OFF 2 Abnormal Stop 3 Automatic Recovery e In the case of current safe heating CT1 example stop code 32 The run lamp 10 s digit flashes 3 times and the timer lamp 1 s digit flashes 2 times 3x 10 2 x 1 32 From the table read the instructions for error code 32 Current safe heating CT1 1 5 sec 0 5 sec 0 5 sec 11 second interval Is not displayed automatic recovery only O Displayed Ifthere isa displayed the error display shows the number of times that an automatic recovery occurred for the same reason has reached the number of times in Ifno _ is displayed the error displa
65. error Defective fan motor defective PCB Is connector connection good YES Is voltage applied to fan motor YES Correct connector connection Defective indoor unit PCB 8 Phenomenon observed after shortcircuit wire breakage on thermistor a Indoor unit Thermistor Operation _ Phenomenon mode Shortcircuit Broken wire Room temperature Cooling Release of continuous compressor operation command Continuous compressor operation command is not released thermistor Heating Continuous compressor operation command is not released Release of continuous compressor operation command Continuous compressor operation command is not Heat exchanger Cooling System can be operated normally released Anti frosting thermistor Heating High pressure control mode Inverter stop command Hot keep Indoor fan stop Humidity Sensor Cooling in the table below in the table below Heating Normal system operation is possible Note 1 The humidity sensor is included in the 50 type only Humidity Sensor Operation Humidity sensor element Connector CnF Failure Mode Control Input Circuit Reading Air conditioning System Operation 3B Disconnected wire Humidity reading is 0 Operates in the Dry region a E Disconnected wire Humidity reading is 0 Operates in the Dry region a Disconnected wire Humidity reading is 0 Operates in the Dry region 3
66. eshooting step 4 Important When all the following conditions are met we say that the air conditioner will not run at all The Run lamp does not light up The flaps do not open The indoor unit fan motors do not run The self diagnosis display does not function Troubleshooting procedure If the air conditioner does not run at all Tf the voltage is correct it will be within the following voltage range 198 264 V Is the correct voltage NO Make sure the correct connected for the power voltage is connected then supply perform an operation check YES With the power off do the flaps open manually NO Is the current fuse on the YES then close again when indoor unit s board blown the power is turned on NO YES Proceed to the indoor unit If the package components circuit board check are not damaged replace the fuse and perform an Is there a reception icheck dsni sound emitted from the NO ope OU Eiee cagan unit when it is operated by the remote controller YES Replace the indoor unit s Proceed to the wireless remote circuit board and perform an controller troubleshooting operation check procedure 33 4 Troubleshooting procedure If the air conditioner runs Confirm the contents of the customer complaint NO The cause of the trouble can be specifically ide
67. essary to choose adequate materials Thicknesses of copper pipes used with R410A are as shown in Table 3 Never use copper pipes thinner than 0 8 mm even when it is available on the market Table 3 Thicknesses of annealed copper pipes Thickness mm Nominal Outer diameter R410A ref R22 diameter mm 1 4 6 35 0 80 0 80 3 8 9 52 0 80 0 80 1 2 12 70 0 80 0 80 5 8 15 88 1 00 1 00 53 2 Joints For copper pipes flare joints or socket joints are used Prior to use be sure to remove all contaminants a Flare joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm In such a case socket joints can be used Sizes of flare pipe ends flare joint ends and flare nuts are as shown in Tables 5 8 see on page 55 56 below Also union half union Tee type union and elbow type union shapes are generally used see Fig 1 Half union Tee Half elbow Fig 1 Flare joints b Socket joints Socket joints are such that they are brazed for connections and used mainly for thick pipings whose diameter is larger than 20 mm Thicknesses of socket joints are as shown in Table 4 Socket elbow type and tee type shapes are generally used see Fig 2 Table 4 Minimum thicknesses of socket joints Nominal Reference outer diameter Minimum joint thickness diameter of copper pipe jointed mm mm 1 4 6 35 0 50 3 8 9 5
68. f no problems are found check the output of the power transistor 2 Output inspection procedure Disconnect the terminals for the compresseor If an output such as the one shown in the figure on the right can be measured the power transistor and the circuit board for the outdoor unit are normal See the section of Thermistor characteristics on page 44 Min MIIA Wi WE tne MAIA MUL MIIL WHE ee ee ee MI U Ni N EAN Inspection of resistance value of discharge pipe H MIE NI HI IM Inspection of electronic expansion valve To test if there is voltage Voltage is only applied to the electronic expansion valve when the valve opening is being changed Red to White Red to Orange Brown to Yellow Brown to Blue If the expansion valve does not operate as shown above it is defective A Normal if there is approximately DC 5 V 10 seconds after the power asupply is turned on X For about 50 seconds After being switched on the will be a delay of approximately one minute depending on the conditions Example Self diagnosis display Flashes 2 times Output voltage ACV ew sec I L Operation SW ON Measure in this section DIIN MIIE MAUA MOUIA MAIE MIINA UINE MMN 6 2 Servicing 1 2 Evacuation The evacuation is an procedure to purge impurities noncondensable gas air moisture from the refrigerant equipment by using a vacuum pump Since the refrigerant R410A is very ins
69. he piping length of 15m Refrigerant oil 2 0 35 MA68 Deice control Microcomputer control p e Oe Tangential fan x 1 Propeller fan x 1 Motor w 29 24 p 3 Cooling 8 9 34 Air flow at High Heating CMM 10 3 34 Air filter Q ty Polypropylene net washable x 2 Shock amp vibration absorber Cushion rubber for compressor Electric heater Operation control Operation switch Wireless Remote controller Room temperature control Microcomputer thermostat Pilot lamp RUN Green TIMER Yellow HI POWER Green ECONO Orange Safety equipment Compressor overheat protection Heating overload protection High pressure control Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Cooling overload protection z 0 D mm in Liquid line 96 35 1 4 Gas line 99 52 3 8 S Connecting method Flare connecting S Attached length of piping Liquid line 0 47 m 32 Gas line 0 40 m Insulation Necessary Both sides Drain hose Connectable Power source cord 2 5 m 3 cores with Earth Connection wiring Size x Core number 1 5 mm x 4 cores Including earth cable Connecting method Terminal block Screw fixing type Accessories included Mounting kit Optional parts Notes 1 The data are measured at the following conditions Item Indoor air temperature Outdoor air temperature i Standards Operation DB WB DB WB Cooling 27 C 19 C 35 C 24 C ISO T1 JI
70. hortcircuit 55 14 125 1 6 10 0 10 20 30 40 50 60 60 12 130 1 4 Temperature C 65 10 135 1 3 Open phase on compressor output Current cut terminal compressor lock Does current cut operate when NO operating inverter with compressor wire disconnected Defective inverter Is output voltage applied to all 3 phases of power transistor Defective inverter YES P Secure space for suction Is there any shortcircuit and blow out YES Check compressor wiring visually Check insulation resistance 1 MQ or over Inspect compressor If check results are normal compressor is locked Check coil wire resistance Few Q 44 Outdoor unit error Broken power transistor broken compressor wire Is output voltage applied to all 3 phases of power transistor Refer to page 50 for details YES Defective inverter Is compressor wiring connected securely Connect securely YES Inspect compressor Cc om pr essor ov erh e at Gas shortage defective discharge pipe thermistor Is Discharge pipe thermistor Connector connection check resistance resistance value good value check replacement of discharge pipe Page 44 thermistor YES Is sufficient quantity of refrigerant circulated Does trouble persist after charging gas YES etc 45 Serial signal transmission error Wiring error including power cabl
71. ion and the flash flash Cut Compressor wiring short circuit reason for the final failure is current cut O Compressor output is open phase Q times O Outdoor unit s circuit board is faulty 2 time 2 Lower than 20 rps Operating valve closed After the compressor starts it stops due to current cut at flash Compressor output is open phase less than 20 rps O Electronic expansion valve is faulty 3 time 3 20 rps or higher Operating valve is closed When operation is stopped by current cut at 20 rps or flash Compressor output is open phase higher Compressor is faulty O Electronic expansion valve is faulty 4 time 4 Excessive voltage Outdoor unit s circuit board is defective When the DC voltage DC 280 V exceeds 350 V O flash DC 350 V Power supply is abnormal aa 5 time 5 Short circuit in the power Outdoor unit s circuit board is faulty When it is judged that the power transistor was damaged flash transistor high side Power tran r is damaged at the time the compressor started O TS 6 time 6 Current cut circuit Outdoor unit s circuit board is faulty When it is judged that the power transistor was damaged eo _ flash breakdown Power transistor is damaged at the time the compressor started 2 time 1 time 21 Outdoor PWM calculation results Compressor wiring is disconnected When PWM calculation results of 0 continue for 3 O flash flash unit are abnormal Power transistor is damaged minutes or longer A 2 time 22 er Inp
72. lash U phase Compressor wiring is disconnected the reason for the final failure is rotor lock O Compressor wiring is short circuited A O R 2 times Outdoor unit s circuit board is faulty 4 time 74 Phase switching defects Compressor is faulty When compressor start fails 42 times in succession an flash V phase Compressor wiring is disconnected the reason for the final failure is rotor lock O Compressor wiring is short circuited times O Outdoor unit s circuit board is faulty 5 time 75 Phase switching defects Compressor is faulty When compressor start fails 42 times in succession an flash W phase or impossible to Compressor wiring is disconnected the reason for the final failure is rotor lock O distinguish Compressor wiring is short circuited times O Outdoor unit s circuit board is faulty ifi 6 time 76 Compressor software start Compressor is faulty When compressor start fai s 42 times in succession an flash within 4 seconds after Compressor wiring is disconnected the reason for the final failure is rotor lock O phase switching Compressor wiring is short circuite k 2 times O Outdoor unit s circuit board is faulty 8 time OFF 80 Protective Indoor unit fan motor is Fan motor is faulty When the indoor unit s fan motor is detected to be flash control abnormal Connector connections are poor running at 300 rpm or lower speed with the fan motor in O operation Indoor unit circuit board is faulty the ON c
73. ling The rotational speed of a compressor is changed in step in relation to varying load interlocked with the indoor and outdoor unit fans controlled to change frequency thus controlling the capacity Allowing quick heating cooling operation during start up period Constant room temperature by fine tuned control after the unit has stabilized 2 Fuzzy control Fuzzy control calculates the amount of variation in the difference between the return air temperature and the setting temperature in compliance with the fuzzy rules in order to control the air capacity and the inverter frequency 3 Remote control flap The flap can be automatically controlled by operating wireless remote control Air scroll AUTO Flap operation is automatically control Swing This will swing the flap up and down Memory flap Once the flap position is set the unit memorizes the position and continues to operate at the same position from the next time 4 Self diagnosis function We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as follows C ATIMER lamp Outdoor LED g Y B82 1 time flash Heat exchanger sensor error l time flash 4 OFF Outdoor temperature sensor error 6 time flash Indoor fan motor error 4 time flas OFF Discharge pipe sensor error I time flash 1 time flash H Current cut 2 time flas 2 time flash Trouble of outdoor unit Toh 3 time flas 3 time flas Over e
74. ling operation 1 Operation of major functional components in Cooling mode 2nd speed Item Functional When the inverter When the inverter speed When the inverter speed is Orps components speed is Orps is other than Orps due to an anomalous stop Indoor fan motor ON ON OFF Flaps ON or OFF ON or OFF Stop position control Display Lights up Lights up Lights up or flashes 52C ON ON OFF after stop mode Qutd or fari motor Derenda e ae 50 type ON aaa a a ya 50 type 4 way valve ON Electronic expansion valve Depending on the stop mode Depending on the EEV control 16 Depending on the stop mode 2 Air flow selection a b c Speed of inverter changes within the range of selected air flow Air flow selection Gi SRK25ZD S SRK35ZD S SRK50ZD S Inverter command speed 20 62rps 20 70rps 15 84rps Auto Air flow Depends on inverter command speed HI Inverter command speed 20 62rps 20 70rps 15 84rps Air flow 7th speed fixed 5th 7th speed MED Inverter command speed 20 52rps 20 58rps 15 60rps Air flow Sth speed fixed 3rd 5th speed Inverter command speed 20 34rps 20 38rps 15 30rps re Air flow 2nd speed fixed When any protective function actuates the operation is performed in the mode corresponding to the function Outdoor blower is operated in accordance with the inverter command speed 3 Detail of control in each mode Pattern a b c
75. ller information diagnosis Data from the time when there were error displays abnormal stops in the indoor unit in the past Data from up to 5 previous occasions are stored in memory Data older than the 5th previous occasion are erased The temperature setting indicates how many occasions previous to the present setting the error display data are and the operation switching and fan speed switching data show the type of data Remote controller setting r Contents of output data Operation switching Fan speed switching MED Displays the reason for stopping display in the past error code Cooling HI Displays the room temperature sensor temperature at the time the error code was displayed in the past AUTO Displays the indoor heat exchanger sensor temperature at the time the error code was displayed in the past LO Displays the remote controller information at the time the error code was displayed in the past k MED Displays the outdoor temperature sensor temperature at the time the error code was displayed in the past one HI Displays the outdoor heat exchanger liquid pipe sensor temperature at the time the error code was displayed in the past AUTO Displays the discharge pipe sensor temperature at the time the error code was displayed in the past Remote controller setting Indicates the number of occasions previous to the present Temperature setting the error display data are from
76. lve it cannot be used as a recovering cylinder e Types by function Valve for liquid m Valve for liquid the tube is inserted to a level close to the cylinder bottom a Val aye Valve for gas alve for gas for gas releasing Signal line c Liquid Liqui Float a Basic type b 2 port valve type c Float type special e l port valve e Capable of delivering cylinder e Can be used for liquid R410A or e With a built in float R410A recovery releasing gas in the signal for prevention of e Inverted when upright position overcharging delivering liquid e Convenient for R410A servicing Fig 8 Cylinder types e Caution It is prohibited by law to recover R410A into a throw away service can or one way cylinder 2 Drier e A desiccant container for removing the water content of R410A e A drier should be prepared as expendables e Keep the drier sealed just before fitting it e Required to protect the R410A recovering equipment 3 Connection hose a Charge port and charge port packing e Usually it is sold independently of a refrigerant cylinder d In the case of a two port cylinder the diameter may be special Inquire the manufacture for confirmation Charge port e A packing is expendables 65 b Charge hose pressure resistant hose for fluorocarbon and packing e It is 1 4B in thickness and available in various lengths etc e Use a hose whose pressure resisting performance is higher
77. making sure of the charged refrigerant amount d Purge air from the charge hose A Firstly loose the connecting portion of the charge hose at the gauge manihold side and open the valve for a few seconds and then immediately retighten it after observing that gas is blow out from the loosened portion e Open the valve 1 and after discharging air from the charge hose A then the liquid refrigerant begins flowing from the cylinder into the unit Be sure to erect the refrigerant cylinder upright to let liquid refrigerant flow into the unit f When refrigerant has been charged into the system to some extent refrigerant flow becomes stagnant when that happens start the compressor in cooling cycle until the unit is filled with refrigerant to the specified weight g Making sure of the refrigerant amount close the valve h Disconnect the charge hose from the unit Cover the valve ports of the refrigerant piping with caps and tighten them securely i Check for gas leakage applying a gas leak detector along the piping line j Start the air conditioner and make sure of its operating condition high side and low side pressures and temperature difference between suction air and outlet air 51 7 REFRIGERANT PIPING INSTALLATION SERVICING MANUAL FOR AIR CONDITONERS USING R410A These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association 7 1 Outline 7 1 1
78. mistor Th4 temperature gt When the temperature has been below 5 C for 3 minutes continuously 4 When the temperature difference between the outdoor air thermistor temperature and the outdoor unit heat exchanger thermistor temperature exceeded 25 type 7 0 C 35 type 5 0 C 50 type 4 0 C During continuous compressor operation In addition when the speed command from the indoor controller of the indoor unit during heating operation has counted 0 rps 10 times or more and all conditions of and above are satisfied note that when the temperature for Th4 is 5 C or less 62 rps or more 4 C or less less than 62 rps defrost operation is started ii Operation of functional components during defrosting operation e 25 35 type Corresponding Hot keep Indoor fan to speed L OFF aie ee Operation lamp Flashing Hot keep Hot keep Outdoor unit Fuzzy calculated Inverter value 70 rps command 0 oo 6th speed 6th speed Corresponding Outdoor fan to speed OFF 4 way valve ON OFF E 60 sec _ Final defrost operation Defrost operation 50 sec A preparation ormal heating operation restored N al i Defrostend Defrost operation 714 543 C 10 minutes Defrost control Note 1 When outdoor unit heat exchanger thermistor Th4 temperature becomes 2 C or higher inverter command changes 70 rps to 50 rps 15 e 50 type Indoor fan to speed OFF ON
79. mperature is in the range of B C C the speed is reduced by 8 rps at each 20 seconds When the temperature is C C or over for 1 minute continuously the inverter is stopped 2 When the indoor unit heat exchanger temperature is in the range of A B C if the inverter command speed is been maintained and the operation has continued for more than 20 seconds at the same speed it returns to the normal heating operation 3 Indoor blower retains the fan tap when it enters in the high pressure control Outdoor blower is operated in accordance with the speed e Temperature list Unit C A B C RPSmin lt 40 88 48 48 5 53 56 58 61 40 88 RPSmin lt 50 108 48 44 53 51 5 58 56 5 50 108 RPSmin 48 5 39 56 46 5 61 51 5 Notes 1 RPSmin The lower one between the outdoor unit speed and the command speed 2 Values in are for Type 50 299 Ss 16 Heating Low Outdoor Temperature Protective Control 50 type only lt I gt a Operating Conditions When the outdoor air thermistor Th5 temperature is 4 C or lower continues for 5 minutes while the outdoor speed is other than 0 rps b Operation Content When the command speed is less than 22 rps the command speed is forcibly set at 22 rps c Reset Conditions When the outdoor air thermistor Th5 temperature becomes 6 C or higher lt I gt a Operating Conditions When the outdoor air thermistor Th5 temperature is 0 C or lower c
80. n refrigerant leaks its concentration does not exceed the marginal level If the refrigerant gas leakage occurs and its concentration exceeds the marginal level an oxygen starvation accident may result 6 Be sure to carry out installation or removal according to the installation manual Improper installation may cause refrigeration trouble water leakage electric shock fire etc 7 Unauthorized modifications to the air conditioner may be dangerous If a breakdown occurs please call a qualified air condi tioner technician or electrician Improper repair s may result in water leakage electric shock and fire etc 7 2 Refrigerant piping installation 7 2 1 Piping materials and joints used d For the refrigerant piping installation copper pipes and joints are mainly used Copper pipes and joints suitable for the refrigerant must be chosen and installed Furthermore it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants Copper pipes It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg 10m Do not use copper pipes having a collapsed deformed or discolored portion especially on the interior surface Otherwise the expansion valve or capillary tube may become blocked with contaminants As an air conditioner using R410A incurs pressure higher than when using R22 it is nec
81. ndeat 5 time flas 5 time flas Over heat of compressor 6 time flas 6 time flas Error of signal transmission 7 time flas ON Outdoor fan motor error 25 35 type only See 2 time flas 7 time flas Rotor lock 1 2 How to read the model name Example SR K35 Z D S R410A models Series No Inverter type Product capacity Wall mounted type Split type room air conditioner 2 SELECTION DATA 2 1 Specifications Model SRK25ZD S Indoor unit SRC25ZD S Outdoor unit Model Item SRK25ZD S SRC25ZD S Cooling capacity Ww 2500 Heating capacity Ww 3400 Power source 1 Phase 220 230 240V 50Hz Cooling input kW 0 62 Running current Cooling A 3 1 3 0 2 9 Sj Heating input kW 0 94 s Running current Heating A 4 5 4 3 4 1 2 Inrush current A 4 5 4 3 4 1 COP Cooling 4 03 Heating 3 62 a Cooling Sound level Hi 37 Me 30 Lo 22 44 ie Power level 53 58 ole leve Heating Sound level a5 Hi 39 Me 33 Lo 26 47 Power level 55 61 PEN Wai S eai mm 250 x 815 x 249 540 x 720 x 290 Color Cool white Stucco white Net weight kg 9 0 32 Refrigerant equipment CEM gasol k sou 2 RM B5077MD1 Rotary type x 1 Motor kW 0 75 Starting method Line starting Heat exchanger Refrigerant control Refrigerant kg Refrigerant oil 2 Deice control Louver fins amp inner grooved tubing Capillary tubes Electronic expansion valve R410A 0 9 Pre Charged up to the piping
82. nditions 1 or 2 shown above Note 1 This control is valid when the room air temperature is in the range of 10 to 40 C at cooling and dehumidification operation and 0 to 40 C at heating operation 21 13 Compressor overheat protection a Purpose It is designed to prevent deterioration of oil burnout of motor coil and other trouble resulting from the compressor overheat b Detail of operation 1 Speeds are controlled with temperature detected by the thermistor mounted on the discharge pipe Example Fuzzy After lapse of 3 min or over no oa 4 rps After lapse of 3 min or over as After lapse of 3 min or over Lower limit 90 100 125 80 90 110 Discharge pipe temperature C Notes 1 When the discharge pipe temperature is in the range of 100 90 to 125 110 C the speed is reduced by 4 rps 2 When the discharge pipe temperature is raised and continues operation for 20 seconds without changing then the speed is reduced again by 4 rps 3 If the discharge pipe temperature is still 90 80 C or greater but less than 100 90 C even when the inverter command speed is maintained for 3 minutes when the temperature is 90 80 C or greater but less than 100 90 C the speed is raised by 2 rps and kept at that speed for 3 minutes This process is repeated until the command speed is reached 4 Lower Limit Speed Cooling Heating 25 35 type 20 30 50 type 22 38 5 Values in are for Type 5
83. ng the conventional refrigerant e Two types of electronic balance for refrigerant charging are available one for 10kg cylinder and the other for 20kg cylinder Electronic balance for 10kg cylinder precision 2g Electronic balance for 20kg cylinder precision 5g e Refrigerant is charged manually by opening closing the valve d Torque wrench for nominal diameters 1 2 and 5 8 e Along with changes in flare nut sizes for enhanced pressure resisting strength torque wrenches for R410A differ in opposite side size Table 14 Differences between conventional wrenches and those for R410A Conventional torque wrench Torque wrench for R410A For 1 2 opposite side 24mm x 55N m 26mm x 55N m x torque 550 kgf cm 550 kgf cm For 5 8 opposite side 27mm x 65N m 29mm x 65N m x torque 650 kgf cm 650 kgf cm 60 2 3 e Flare tool clutch type e A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0 0 5 mm in flare processing and also features higher spring strength for increased expansion pipe torque This flare tool can also be used for R22 copper pipe f Gauge for projection adjustment used when flare processing is made by using conventional flare tool clutch type e A gauge 1 0 mm in thickness which helps in easily setting the projection of the copper pipe from the clamp bar at 1 0 1 5
84. nit fan corresponds to the command speed of each operation mode Note 1 When the calculated speed is less than 64 rps the unit is started with low load starting described in article 6 Low load starting a When the unit is started with calculated speed of less than 60 30 rps it is operated with 60 30 rps for 80 60 seconds then the operation is moved to the command speed b The indoor fan corresponds to the operation mode Cooling Speed corresponding to the command speed of air flow switching Dehumidification Speed decided in the operation region Heating The lower one between the speed corresponding to the command speed and the hot keep speed Note 1 Values in are for Type 50 20 7 Inching prevention When the compressor goes into the thermo operation within 10 5 minutes since operation start or becomes various dehumidifying operations the operation is continued with the command speed of 20 15 rps forcibly Note 1 Values in are for Type 50 8 Current safe a b Purpose Current is controlled not to exceed the upper limit of the setting operation current Detail of operation Input current to the converter is monitored with the current sensor fixed on the printed circuit board of the outdoor unit and if the operation current value reaches the limiting current value the inverter speed is reduced If the mechanism is actuated when the speed of outdoor unit is less than 30 rps the compressor is st
85. nly distributed A solid place where the unit or the wall will not vibrate A place where there will be enough space for servicing Where space mentioned below can be secured Where wiring and the piping work will be easy to conduct The place where receiving part is not exposed to the direct rays of the sun or the strong rays of the street lighting Outdoor unit a b c d e f g h A place where good air circulation can be obtained J 10 cm EI A 1 5 cm A place where the exhausted air will not be sucked in for the second time A place where the unit will not be affected by other heat sources When there are several units installed or another heat source Do not install the unit near the seaside or where there is possibility of chlorine gas generation A place where discharged hot and cold air or unit s operating sound will not be a nuisance to the neighborhood A place where servicing space can be secured No obstacles Service space for electrical Note 1 If the wall is higher than 1 2 m or a ceiling is present distances larger than indicated in the above table must be provided Unit mm A place where vibration will not be enlarged Snow hood In heating operation snow deposit on the heat exchanger of outdoor unit must be prevented for keeping the normal performance capacity i Snow hood on
86. nt compressor motor current exceeds the set ON flash Current Cut shortcircuit on power value during compressor start as transformer closed control The air conditioner stops valve Outdoor fan motor a ON 7 time anor e Defective fan motor poor When the outdoor unit s fan motor sped continues for 30 seconds or flash 25 35 type only connector connection longer at 75 rpm or lower 3 times The air conditioner stops Broken power transistor broken compressor wire When there is an emergency stop caused by trouble in the outdoor unit 2 time Trouble of outdoor Broken discharge pipe sensor or the input current value is found to be lower than the set value ON flash unit wire poor connector continuously for 3 minutes or longer connection The air conditioner stops e Compressor blockage i Defective compressor If the compressor motor s magnetic pole positions cannot be correctly 2 time 2 time 0 has i d d when th anat atata flash flash Rotor lock pen phase on compressor etected when the compressor starts Defective outdoor unit boards The air conditioner stops Notes 1 There is no error indicator in the 25 and 35 types 2 The air conditioner cannot be restarted using the remote controller for 3 minutes after operation stops 35 6 Service mode Trouble mode access function This air conditioner is capable of recording error displays and protective stops service data which have occurred
87. ntified Y Check the self diagnosis display Eliminate the cause of the trouble and perform an operation check See pages 35 y Is an error code displayed by NO al Using the Service Mode access the self diagnosis the self diagnosis function displays generated in the past YES See pages 36 39 YES Is there a history of self diagnosis display items NO Using the Service Mode access the stop history due to protection control generated in the past See pages 36 39 a YES Is there a history of stops due to protection control NO A Identify the faulty component by using the check procedure corresponding to the content of the trouble Replace the faulty component then perform an The air conditioning system is operating normally operation check Note 1 Even in cases where only intermittent stop data are generated the air conditioning system is normal However if the same protective operation recurs repeatedly 3 or more times it will lead to customer complaints Judge the conditions in comparison with the contents of the complaints 34 5 Self diagnosis table When this air conditioner performs an emergency stop the reason why the emergency stop occurred is displayed by the flashing of display lamps If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop the trouble dis
88. o i Tie up the piping with wrapping tape and shape it so Electrical wiring ie willmateh the ontours oF the 4 A Erta EN route that the piping to take Also that it conforms to which the pipe is attached Covering tape fix the wiring and pipings to the Drain hose wall with clamps ii Fix them with clamps as right figure Tapping screw 5 5 Test run 1 Conduct trial run after confirming that there is no gas leaks 2 When conducting trial run set the remote controller thermostat to continuous operation position However when the power source is cut off or when the unit s operation switch is turned off or was turned to fan operation position the unit will not go into operation in order to protect the compressor 3 Insert in electric plug into the electric outlet and make sure that it is not loose a When there is something wrong with the electric outlet and if the insertion of the electric plug is insufficient there may occur a burn out b Itis very important to be careful of above when plugging in the unit to an already furnished electrical outlet 4 Explain to the customer on the correct usage of the air conditioner in simple layman s terms 5 Make sure that drain flows properly 6 Standard operation data 220 230 240V Model item SRK25ZD S SRK35ZD S SRK50ZD S High pressure MPa eons Heating 2 5 2 7 2 8 3 0 3 2 3 3 Lew pressure MPS Cooling 0 9 1 1 0 8 1 0 0 7 0
89. oils alkylbenzene synthetic oils etc they may deteriorate and block the capillary tubes or cause the compressor to fail So never mix these synthetic oils 7 1 2 Safety during installation servicing As R410A s pressure is about 1 6 times higher than that of R22 improper installation servicing may cause a serious trouble By using tools and materials exclusive for R410A it is necessary to carry out installation servicing safely while taking the following precautions into consideration 1 Never use refrigerant other than R410A in an air conditioner which is designed to operate with R410A 2 Ifa refrigeration gas leakage occurs during installation servicing be sure to ventilate fully If the refrigerant gas comes into contact with fire a poisonous gas may occur 3 When installing or removing an air conditioner do not allow air or moisture to remain in the refrigeration cycle Otherwise pressure in the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused 4 After completion of installation work check to make sure that there is no refrigeration gas leakage If the refrigerant gas leaks into the room coming into contact with fire in the fan driven heater space heater etc a poisonous gas may occur 5 When an air conditioning system charged with a large volume of refrigerant e g multi type air conditioner is installed in a small room it is necessary to exercise care so that even whe
90. oluble in water even a small amount of moisture left in the refrigerant equipment will freeze causing what is called water clogging Evacuation procedure a Check to ensure that there is no internal pressure in the unit If there is an internal pressure it should be relieved through the check joint b Connect the service hoses of the gauge manifold to the check joint of the gas amp liquid piping c Connect a vacuum pump to the charge hose A Repeat evacuation in the following sequence Liquid side Start the vacuum pump a Compound pressure gauge indicates 0 1 MPa 76 cmHg 52 Operate the vacuum pump for more than 15 minutes after 0 1 MPa 76 cmHg is indicated Gas side Check joint J Close low pressure valve of gauge manifold Il Service hose Gauge manifold E Refrigerant cylinder Stop the vacuum pump Charge hose Vacuum pump Notes 1 Do not use the refrigerant pressure to expel air 2 Do not use the compressor for evacuation 3 Do not operate the compressor in the vacuum condition re Refrigerant charge a Discharge refrigerant entirely from the unit and evacuate the unit Note Addition of refrigerant without evacuation is unreasonable because it will result in low charge or overcharge b Keep the gauge manifold and connect a refrigerant cylinder to the unit c Record the weight of the refrigerant cylinder on the balance This is necessary for
91. om temperature This button changes the present time and TIMER time CANCEL button This button cancels the ON timer and OFF timer RESERVE button This button sets the present time and TIMER time RESET switch Switch for resetting microcomputer of F RESERVE e The above illustration shows all controls but in practice only the relevant parts are shown Indication section ECONOMY MODE indicator Indicates during economy mode operation Q K a OPERATION MODE Indicator 4 HI POWER MODE indicator Indicates during Hi power mode operation TEMPERATURE Indi wots my eam en ndicator HI HI AAA Indicates set temperature a0 m El Lal Does not indicate temperature when operation ike c _ 8 mode is on AUTO ey ON OFF T 7 77 a A FAN SPEED Indicator Indicates set air flow rate with m lamp AIR FLOW Indicator Shows selected flap mode ON TIMER Indicator Indicates during ON TIMER operation Indicates selected operation with W lamp EBS p p A Auto 3 Cool 7 4 Heat O Dry Clock Indicator Indicates present time or timer setting time OFF TIMER Indicator Indicates OFF TIMER operation 11 Unit indication section Models All models RUN TIMER HI POWER ECONO 4 2 Back up switch RUN HOT KEEP light green e Illuminates during operation e Flashes at
92. ondition while the air conditioner is running 1 time 81 Discharge pipe sensor is Discharge pipe sensor wire is When a disconnection signal temperature below 7 C is sent for flash abnormal anomalous stop disconnected 15 seconds or longer as the discharge pipe sensor data after the Q O Connector connections are poor outdoor unit s speed is 0 rps or higher continuously for 9 minutes 4 times 2 time 82 Indoor heat exchanger sensor maosi hoat exe naneey sensor wire is When a temperature of 20 C or lower is sensed continuously O gt disconnected j 8 flash is abnormal anomalous stop Connector connections are poor for 40 minutes during heating operation the compressor stops 3 time 83 Heat exchanger liquid pipe sensor Heat ki a per quis Pipe sensor When a temperature of 50 C or lower is sensed continuously O flash is abnormal anomalous stop Corinector connections are poor for 40 minutes during heating operation the compressor stops 4time 84 Anti condensation control High humidity condition Anti condensation prevention control is operating O flash Humidity sensor is faulty 5 time 85 Anti frost contro Indoor unit fan speed drops When the anti frost control operates and the compressor O flash Indoor heat exchanger sensor short circuit stops during cooling operation 6 time 86 High pressure control Heating overload When high pressure control operates during heating flash Indoor unit fan speed drops op
93. ontinuously for 5 minutes while the outdoor speed is other than 0 rps b Operation Content The outdoor fan motor speed is raised to the next higher speed Upper limit 2nd speed c Reset Conditions When the outdoor air thermistor Th5 temperature becomes 2 C or higher lt i gt a Operating Conditions When the temperature sensed by the outdoor heat exchanger thermistor Th4 becomes 10 C or lower continuously for 1 minute b Operation Content When the command speed upper limit is set at 70 rps c Reset Conditions When the temperature sensed by the outdoor heat exchanger thermistor Th4 becomes 7 C or higher 17 Stop mode a b Operating conditions When the operation mode is changed when the dehumidifying operation is changed from the heating oriented mode to the cooling oriented mode or vice versa or when the inverter speed turns to 0 rps When 0 rps is commanded from the indoor unit controller or when an outdoor protective function is actuated Detail of operation SRK25ZD S 35ZD S When stopped or reset by outdoor unit protective function When stopped by indoor unit controller Function Operation Cooling cooling oriented dehumidifying Heating heating Cooling cooling Heating heating oriented dehumidifying oriented dehumidifying oriented dehumidifying 3 min in Command 3 min speed 0 Inverter speed Speed Indoor dependent an
94. opped immediately Simultaneously a red LED on the printed circuit board provided on the outdoor unit controller flashing 3 times for 0 5 second at intervals of 8 seconds Operation starts again after a delay time of 3 minutes 9 Current cut a b Purpose Inverter is protected from overcurrent Detail of operation Output current from the converter is monitored with a shunt resistor and if the current exceeds the setting value the compressor is stopped immediately Simultaneously a red LED on the printed circuit board provided on the outdoor unit controller flashing for 0 5 second at intervals of 8 seconds Operation starts again after a delay time of 3 minutes 10 Heating overload protective control a b c Operating conditions When the unit is operating with the outdoor unit speed other than 0 rps or when the outdoor air temperature detected by Th5 rose beyond 17 C for 30 seconds continuously Detail of operation 1 Indoor fan speed is raised forcibly by 1 step 2 Taking the upper limit of control speed range at 60 rps if the output speed obtained with the fuzzy calculation exceeds the upper limit the upper limit value is maintained 3 The outdoor fan is set on 2nd speed 25 35 types only 4 The lower limit of control speed is set to 40 35 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 40 35 rps However when the thermo becomes OFF the s
95. peed is reduced to 0 prs Reset conditions When the outdoor air temperature drops below 16 C Note 1 Values in are for Type 50 11 Cooling overload protective control a b c Operating conditions When the outdoor unit is operating with the speed of other than 0 rps or when the outdoor air temperature detected by Th5 becomes 41 C or over for 30 seconds continuously Detail of operation 1 Outdoor fan is stepped up by 3 1 speed step 2 The lower limit of control speed is set to 30 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 30 rps However when the thermo becomes OFF the speed is reduced to 0 rps 3 The upper limit of control speed is 72 rps Restoration condition When the outdoor air temperature becomes 40 C or less Note 1 Values in are for Type 50 12 Freezing cycle system protective control a b c Operating conditions When both of following conditions have continued for more than 5 minutes later than 5 minutes after the start of operation 1 Command speed is higher than 60 rps 2 During cooling dehumidifying Indoor heat exchanger temperature Room temperature gt 4 C During heating Indoor heat exchanger temperature Room temperature lt 6 C Detail of operation The command speed repeats 30 minutes at 30rps lt gt 2 minutes at 62 rps Restoration conditions When the condition becomes outside of either co
96. play stops and the air conditioner resumes operation Indoor unit display panel Run lamp Timer lamp Description of trouble Error of signal transmission Cause e Defective power supply Broken signal wire defective in outdoor unit boards Display flashing condition When there is no signal between the indoor unit s board and outdoor unit s board for 10 seconds or longer when the power is turned on or when there is no signal for 1 minute 50 seconds or longer during operation the compressor is stopped Heat exchanger sensor error Broken heat exchanger sensor wire poor connector connection When a heat exchanger sensor wire disconnection is detected while operation is stopped If a temperature of 20 C or lower is detected for 15 seconds it is judged that the wire is disconnected Not displayed during operation Room temperature sensor error e Broken room temperature sensor wire poor connector connection When a room temperature sensor wire disconnection is detected while operation is stopped If a temperature of 20 C or lower is detected for 15 seconds it is judged that the wire is disconnected Not displayed during operation Indoor fan motor error e Defective fan motor poor connector connection When conditions for turning the indoor unit s fan motor on exist during air conditioner operation an indoor unit fan motor speed of 300 rpm or lower is meas
97. r if this function needs to be switched off 2 When power failure ocurrs the timer setting is cancelled Once power is resumed reset the timer 3 If the jumper wire J7 REMOTE AUTORESTART is cut auto restart is disabled See the diagram at right 12 lens _ i Pn iy aap he 4 Sr gt Ile Be REMOTEZAUTORESTART S a4 I a EL E CNHCFLASH i J65 S D7 I cao Da JEM A E TRO ne 1 hi q 44 aT g S E 4 4 Flap control Control the flap by AIRFLOW button on the wireless remote control 1 Air scroll AUTO The flap will be automatically set to the angle of air flow best to operation a Starting time of operation During cooling and During heating dry operation operation lt Stops for approximately 5 seconds in the horizontal position Stops for approximately 5 seconds in this Thick line Rapid movement position Thick line Rapid movement Thin line Slow movement Thin line Slow movement b When not operating The flap returns to the position of air flow directly below when operation has stopped 2 Memory flap While the flap is operating if the AIRFLOW button is pushed once it stops swinging at an angle As this angle is memorized in the microcomputer the flap will be automatically set to the angle when next operation is started Recommendable stopping angle of the flap ae 3 Swing flap Horizontal
98. r to the treated metal Properties required for flux Temperature at which flux is active coincides with the brazing temperature Due to a wide effective temperature range flux is hard to carbonize e It is easy to remove slag after brazing The corrosive action to the treated metal and brazing filler is negligible e Excels in coating performance and is harmless to the human body As the flux works in a complicated manner as described above it is necessary to choose an adequate type of flux according to the type and shape of treated metal type of brazing filler and brazing method etc Types of flux e Incorruptible flux Generally it is a compound of borax and boric acid Effective in cases where the brazing temperature is higher than 800 C e Activated flux Most of fluxes generally used for silver brazing fall under this type It features an increased oxide film removing capability due to the addition of compounds such as potassium fluoride potas sium chloride and sodium fluoride to the borax boric acid compound Cautions Remove the flux after brazing 2 When chlorine contained in the flux stays within the pipe the lubricating oil deteriorates So use a flux which does not contain chlorine When adding water to the flux use water which does not contain chlorine e g distilled water or ion exchange water 4 Brazing As brazing requires sophisticated techniques and experiences it must be performed by a qualified pe
99. rds Operation DB WB DB WB Cooling 27 C 19 C 35 C 24 C ISO T1 JIS C9612 Heating 20 C TC 6 C ISO T1 JIS C9612 The piping length is 7 5m 2 The operation data are applied to the 220 230 240V districts respectively 3 The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping Purging is not required even for the short piping Model SRK35ZD S Indoor unit SRC35ZD S Outdoor unit ms moet SRK35ZD S SRC35ZD S Cooling capacity w 3500 Heating capacity w 4500 Power source 1 Phase 220 230 240V 50Hz Cooling input kW 1 09 Running current Cooling A 5 4 5 2 5 0 Heating input kW 1 24 Running current Heating A 5 9 5 7 5 4 Z inrush current A 5 9 5 7 5 4 2 COP Cooling 3 21 Heating 3 63 3 Cooling Sound level Hi 41 Me 32 Lo 23 48 e g Power level 58 62 Nolse leve Heating Sound level Hi 45 Me 36 Lo 27 50 Power level 59 64 rion aie Beak mm 250 x 815 x 249 540 x 720 x 290 Color Cool white Stucco white Net weight kg 9 0 35 Refrigerant equipment Compressor S Ane RM B5077MD1 Rotary type x 1 Motor kW 0 90 Starting method Line starting Heat exchanger Louver fins amp inner grooved tubing Refrigerant control Capillary tubes Electronic expansion valve Refrigerant kg R410A 1 1 Pre Charged up to t
100. rror etc from the table See pages 38 and 39 NO Turn off the air conditioner s power to terminate the Are other data displayed service mode If you are going to turn the power on again wait 1 minute or longer after turning it off f YES Change the remote controller s settings based on the instructions in the table See page 37 36 3 To count the number of flashes in the service mode count the number of flashes after the lamp lights up for 1 5 second initially start signal The time that the lamp lights up for 1 5 second start signal is not counted in the number of flashes e In the case of current safe heating CT1 example stop code 32 The run lamp 10 s digit flashes 3 times and the timer lamp 1 s digit flashes 2 times 3x 10 2 x 1 32 From the table read the instructions for error code 32 current safe heating CT1 1 5 sec ON Run lamp 10 s digit OFF i ON Timer lamp 1 s digit OFF 11 second interval fag 4 When in the service mode when the remote controller s settings operation switching fan speed switching temperature setting are set as shown in the following table and sent to the air conditioner unit the unit switches to display of service data Self diagnosis data What are Self These are control data reasons for stops temperature at each sensor remote contro
101. rson In order to prevent the oxide film from occurring in the pipe interior during brazing it is effective to proceed with brazing while letting dry nitrogen gas N2 flow lt Brazing method for preventing oxidation gt a b c d e f 8 Attach a reducing valve to the nitrogen gas cylinder Use a copper pipe to direct the nitrogen gas into the piping and attach a flowmeter to the nitrogen gas cylinder Apply a seal onto the clearance between the piping and inserted pipe for the nitrogen gas in order to prevent the nitrogen gas from flowing backward When the nitrogen gas is flowing be sure to keep the piping end open Adjust the flow rate of nitrogen gas so that it is lower than 0 05m h or 0 02MPa 0 2kgf cm by means of the reducing valve After taking the steps above keep the nitrogen gas flowing until the piping cools down to a certain extent i e temperature at which pipes are touchable with finger Completely remove the flux after brazing 58 Reducing valve M Flow meter se3 UsSONIN Stop valve From the nitrogen cylinder _ Nitrogen gas Rubber plug for sealing Fig 5 Prevention of oxidation during brazing Cautions during brazing General cautions 1 The brazing strength should be high as required 2 After operation airtightness should be kept under a pressurized condition 3 During brazing do not allow component materials to become damaged due to overheating
102. s for R410A Applicable to R22 model a Gauge manifold x b Charge hose c Electronic balance for refrigerant charging d Torque wrench nominal diameter 1 2 5 8 e Flare tool clutch type f Gauge for projection adjustment g Vacuum pump adapter h Refrigerant cylinder i Charge port and packing for refrigerant cylinder xixixiolololxiolx j Gas leakage detector Used when conventional flare tool clutch type is used Note For inquiry contact your agent 61 7 3 2 New installation work when using new refrigerant piping 1 Air purge by vacuum pump and gas leakage inspection see Fig 6 a Connect the charge hose to the outdoor unit b Connect the charge hose to the vacuum pump adapter At this time keep the control valves in the fully closed position c Place the handle Lo in the fully opened position and turn on the vacuum pump s power switch During this step perform evacuating about 10 15 minutes for the evacuating time refer to the equipment manufacturer s manual d When the compound gauge s pointer has indicated 0 1 MPa 76 cmHg place the handle Lo in the fully closed position and turn OFF the vacuum pump s power switch Keep this state for 1 2 minutes and ascertain that the compound gauge s pointer does not return e Fully open the control valves f Detach the charge hoses O
103. s using R410A do not always use the same type of the lubricating oils 7 3 5 Retrofitting Do not operate the air conditioner which has used the conventional refrigerant R22 by charging the alternative refrigerant R410A Otherwise the equipment may cease to function normally and go wrong or even cause serious problems such as rupture of the refrigeration cycle 63 7 3 6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant charge the specified amount of new refrigerant according to the following steps For details see the instruction manual prepared by the equipment manufacturer 1 Connect the charge hose to the outdoor unit s service port 2 Connect the charge hose to the vacuum pump adapter At this time keep the control valves in the fully opened position 3 Place the handle Lo in the fully opened position and turn ON the vacuum pump s power source For the evacuating time refer to the equipment manufacturer s manual 4 When the compound gauge s pointer has indicated 0 1 MPa 76 cmHg place the handle Lo in the fully closed position and turn OFF the vacuum pump s power source Keep this state for 1 2 minutes and ascertain that the compound gauge s pointer does not return 5 Charge liquid refrigerant by using the electronic balance according to the steps described in Section 7 3 2 2 pages62 63 7 4 Refrigerant recovery 7 4 1 Recovering procedures 1
104. tdoor temperature Compressor loc uring cooling operation ag O 36 40 C Overload operation 2 time 42 Heating overload 1 Overcharge When there is a current safe stop in overload 1 mode flash outdoor temperature Compressor loc uring heating operation Az O 5 12 C Overload operation 3 time 43 Cooling overload 2 Overcharge When there is a current safe stop in overload 2 mode flash outdoor temperature Compressor loc s uring cooling operation C 40 45 C Overload operation 4time 44 Heating overload 2 Overcharge When there is a current safe stop in overload 2 mode flash outdoor temperature Compressor loc uring heating operation O 2 17 C Overload operation 5 time 45 Cooling overload 3 Overcharge When there is a current safe stop in overload 3 mode flash outdoor temperature Compressor loc uring cooling operation O 45 C Overload operation 6 time 46 Heating overload 3 Overcharge When there is a current safe stop in overload 3 mode flash outdoor temperature Compressor loc uring heating operation O TC Overload operation 5 time OFF 50 Compressor 125 C Insufficient refrigerant When the discharge pipe sensor s value exceeds the set O flash overheat Discharge pipe sensor is faulty value O Operation valve is closed 2 times 6 time OFF 60 Serial signal Can t receive signals for 1 minute Power supply is faulty When 1 minute 55 seconds passes without flash transmission 55 seconds if communications Powersupply
105. te intervals and depending on the result determines the range of heating oriented dehumidifying operation Operation range Note 1 Figures in the parentheses O L L show the values at economical operation Low 1 0 High Room temperature Setting temperature deg Operation pattern Heating operation Orange range range 25 35 type 38 25 35 type 48 50 type 28 50 type 44 25 35 type 30 50 type 15 Inverter speed Indoor fan 4th speed 2nd speed 1st speed OFF 50 type 50 type 1st speed 1st speed 1st speed Outdoor fan 3rd speed Depends on the operation condition OFF Determination of heating oriented dehumidifying operation range Temperature check 18 4 9 Outline of automatic operation 1 Determination of operation mode 2 3 4 The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20 seconds determines the operation mode and the room temperature setting correction value and then begins in the automatic Dehumidifying operation 27 5 25 5 Room temperature C 19 5 Heating 18 30 Outdoor temperature C The unit checks the temperature every hour after the start of operation and if the result of check is not same as the previous operation mode changes the operation mode When the unit is start
106. the data which display the reason by a stop occurred when the air conditioning system performed protective stops etc in the past Even if stop data alone are generated the system restarts automatically After executing the stop mode while the display is normal the system restarts automatically Data for up to 10 previous occasions are stored Data older than the 10th previous occasion are erased Important In cases where transient stop data only are generated the air conditioner system may still be normal However if the same protective stop occurs frequently 3 or more times it could lead to customer complaints Stop data ii Service mode display procedure Start a Turn off the air conditioner s power once then wait 1 minute or longer Turn the air conditioner s power on again while pressing the backup switch YES NOCD 1 If the buzzer does not sound no matter how Did a buzzer located in many times you repeat the operation the the indoor unit sound backup switch may be faulty Within 1 minute after turning the air 2 Set the remote controller s settings on conditioner s power on signals will be sent from Cooling Operation Fan Speed MED the remote controller and Set Temperature 21 C 1 Count the number of times the Run lamp and Timer lamp flash gt and check the contents of the e
107. thermistor Discharge temp thermistor Compressor Service valve Liquid Capillary tube QQQ gt Electronic expansion valve Capillary tube Strainer Outdoor unit Cooling cycle Heating cycle E Outdoor air temp thermistor Service valve Flare V Piping Gas 12 7 ahaa Heat exchanger thermistor Room temp thermistor Heat exchanger Piping Liquid 96 35 Flare connecting Check joint lt Gas 4 way valve 4 1 1 I Heat exchanger Heat M meme E EN thermistor Discharge temp thermistor Compressor Service valve Liquid Capillary tube Capillary tube VOY gt Electronic expansion valve Strainer 2 5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows The net cooling and heating capacity can be obtained in the following way Net capacity Capacity shown on specification X Correction factors as follows 1 Coefficient of cooling and heating capacity in relation to temperatures to p 1 2 ee D i at cB Cooling seo Sao 1 1 gt A sE A lx 92 1 0 ert e e 22 Pane Heating Boe l we l 9 0 9 i i 838 pez Pa Os 0 8 dt i 3 0 7 4 i I
108. ting ae r HI Outdoor heat exchanger liquid pipe sensor temperature on fifth previous occasion AUTO Discharge pipe sensor temperature on fifth previous occasion 21 Stop code on previous occasion 22 Stop code on second previous occasion 23 Stop code on third previous occasion 24 Stop code on fourth previous occasion 25 Stop code on fifth previous occasion Cooling Lo 26 Stop code on sixth previous occasion 27 Stop code on seventh previous occasion 28 Stop code on eighth previous occasion 29 Stop code on ninth previous occasion 30 Stop code on tenth previous occasion rm v Judgment E x isa Remarks 43 7 Inspection procedures corresponding to detail of trouble Thermistor error Broken thermistor wire connector poor connection Replace thermistor Is connector connection good YES Is thermistor resistance value good YES Replace PCB Discharge pipe thermistor temperature characteristics Thermistor temperature characteristics Room temperature indoor unit heat Temperature C Resistance kQ Temperature C Resistance kQ exchanger temperature outdoor unit 0 164 70 8 7 heat exchanger temperature outdoor 5 127 75 73 temperature 10 99 80 6 2 30 TEER w A T T 20 62 90 4 5 25 25 50 95 3 9 G 20 30 40 100 3 3 g 35 32 105 2 9 5 15 n 40 26 110 2 5 9 10 oe CENG 50 17 120 1 9 5 S
109. tinuous operation after operation starts The command speed is 28 rps or higher The humidity sensor value is 68 or higher Inverter command speed at upper limit b Operation Contents 30 rps Type Item SRK50ZD S Sigs Fan Speed Medium Indoor fan speed 4th speed Fan Speed Low Indoor fan speed 4th speed 68 73 Other Settings Indoor fan speed Corresponding to command speed Humidity c Reset Conditions When either of the following conditions is satisfied The command speed is lower than 28 rps The humidity sensor value is less than 63 Prevention of continuous low speed operation For oil return to compressor a Operating conditions When command speed of less than 30 26 rps continues for 8 60 minutes b Detail of operation The unit is operated at command speed of 30 rps forcibly for 15 seconds The indoor and outdoor fans are not changed Notes 1 When the command of exceeding 30 rps is directed during 30 rps forced operation the unit follows it 2 Values in _ are for Type 50 Compressor protection start a When the indoor unit calculated speed is 64 rps or over at operation start the unit is operated with 64 rps for 1 minute and 45 seconds All models After that when the calculated speed is 96 rps or over the unit is operated with 96 rps for 5 minutes then moved to command speed 50 type only b At thermo operation OFF ON this control is not executed c The indoor u
110. tion work that refrigerant does not leak If coming in contact with fire of a fan heater a stove or movable cooking stove etc refrigerant leaking in the room could generate toxic gas In joining pipes do not use conventional R22 pipng flare nuts etc The use of conventional pipng materials may lead to the rapture of piping due to higher pressure used for the refrigerant cycle and possible personal injury Use only piping material designed specifically for R410A AN CAUTION Execute proper grounding Do not connect the ground wire to a gas pipe water pipe lightning rod or a telephone ground wire Improper placement of ground wires can result in electric shock The installation of an earth leakage breaker is necessary depending on the established location of the unit No installing an earth leakage breaker may result in electric shock Do not install the unit where there is a concern about leakage of combustible gas S The rare even of leaked gas collecting around the unit could result in an outbreak of fire For the drain pipe follow the installation manual to insure that it allows proper drainage and thermally insulate it to prevent condensation Inadequate plumbing can result in water leakage and water damage to interior items 5 1 Selection of location for installation 1 2 3 Indoor unit a b c d e Where there is no obstructions to the air flow and where the cooled air can be eve
111. tor to prevent blowing of cool wind e Normal mode Normal heating operation operation after HI POWER completion 25 35ZD only 25 35ZD only 9th speed 8th speed y t 7th speed i 6th speed 4 i 4 5th speed 1 4 I i 4th speed i i 4 3rd speed 4 weed EE T T a a a A B 4 352D 23 C 28 29 5 31 5 34 36 37 5 39 40 50ZD 20 C Indoor heat exchanger temp C Note 1 Refer to the table shown above right for the values A and B 14 e Values of A B A B At 0 rps command 22 25 Other than 0 rps 17 19 command e Hot keep M mode During HI POWER operation for 15 min 25 35ZD only 25 35ZD only 9th speed 8th speed e Values of A B i A B t At 0 rps command 22 25 4th speed i command Other than 0 rps 17 19 3rd speed 1st speed op Eo oo o A B 29 31 32 34 36 40 43 47 Indoor heat exchanger temp C Notes 1 Refer to the table shown above right for the values A and B 2 Values in are for type 25 35 d Defrosting operation i Starting conditions Defrosting operation can be started only when all of the following conditions are met After start of heating operation When it elapsed 35 minutes Accumulated operation time After end of defrosting operation gt When it elapsed 35 minutes Accumulated compressor operation time 3 Outdoor unit heat exchanger ther
112. uffi cient injury can result from a falling of the unit For electrical work please see that a licensed electrician executes the work while following the safety standards related to electrical equipment and local regulations as well as the installation instructions and that only exclu sive use circuits are used Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks and fires Accurately connect wiring using the proper cable and insure that the external force of the cable is not conducted to the terminal connection part through properly securing it improper connection or securing can result in heat generation or fire Take care that wiring does not rise upward and accurately install the lid service panel It s improper installation can also result heat generation or fire When setting up or moving the location of the air conditioner do not mix air etc or anything other than the designated refrigerant within the refrigeration cycle Rupture and injury caused by abnormal high pressure can result from such mixing Always use accessory parts and authorized parts for installation construction Using parts not authorized by this company can result in water leakage electric shock fire and refrigerant leakage Ventilate the work area when refrigerant leaks during the operation Q Coming in contact with fire refrigerant could generate toxic gas Confirm after the foundation construc
113. um pump adapter Anti reverse flow type Designed specifically for R410A 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 Please use one designed specifically for R410A 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 Additional refrigerant charge e 25 35 type Additional refrigerant charge is not required at all e 50 type When refrigerant piping exceeds 15m conduct additional refrigerant charge by weight after refrigerant piping completion Additional charge amount per meter 20g m Example How much amount of additional charge for 25m piping 25 15 m x 20g m 200g 200g for additional charge 30 4 Insulation of connecting portion a Cover the connecting portion of the refrigerant piping with the pipe cover and seal them If neglecting to do so moisture occurs on the piping and water will drip out To cover the connecting portion with insulation material materials cut upper portion Vinyl tape and then seal it with insulation materials a R b Finishing and fixing Insulation Cover the exterior portion with cov 7 rae i Refrigerant piping ering tape and shape the piping s
114. ured for 30 seconds or longer The air conditioner stops ON Over heat of compressor e Gas shortage defective discharge pipe sensor closed control valve When the value of the discharge pipe sensor exceeds the set value The air conditioner stops Keeps flashing Outdoor heat exchanger liquid pipe sensor error e Broken heat exchanger liquid pipe sensor wire poor connector connection When a liquid pipe sensor wire disconnection is detected while operation is stopped If a temperature of 50 C or lower is detected for 15 seconds it is judged that the wire is disconnected Not displayed during operation When an outdoor temperature sensor wire disconnection is detected Keeps 1 time ee Sior Broken outdoor sensor wire while operation is stopped If a temperature of 40 C or lower is flashing flash P K poor connector connection detected for 15 seconds it is judged that the wire is disconnected Not GLO displayed during operation A When a compressor discharge pipe sensor wire disconnection is e Broken discharge pipe sensor Keeps 4 time Discharge pipe wire poor ER detected for 15 seconds or longer less than 7 C after the outdoor flashing flash sensor error co mecdon unit s speed has continued at 0 rps or higher for 9 minutes The air conditioner stops e Compressor locking open Comp locking op 1 time phase on compressor output The inverter output curre
115. urely to the terminal block If the wire is not affixed completely contact will be poor and it is dangerous as the terminal block may heat up and catch fire Take care not to confuse the terminal numbers for indoor and outdoor connections Affix the connection wire using the wiring clamp 5 Fix the connecting wire by wiring clamp 6 Attach the lid 7 Close the suction grille b Protective taping Protect the cable with tape at the section where the cable passes through the hole opened on the wall c Forming of pipe Holding down the pipe at the root change the pipe direction extend it and adjust according to the circumstance When the pipe is extended to left and taken out from the rear center Drain pipe relocation procedure 1 Remove the drain pipe 2 Remove the drain cap 3 Insert the drain cap 4 Connect the drain pipe Loosen the spring Remove by hand or Securely insert the clamp to remove use cutting pliers etc drain cap removed in the step 2 Note If it is inserted in sufficiently water leakage could re sult x att a2 Gutter Since this air conditioner has been designed to collect dew drops on the rear surface to the drain pan do not attach the power cord above the gutter Pipe accommodation section 28 Loosen the spring clamp and securely insert the drain pipe Note If it is inserted in sufficiently water leakage could result 4
116. ut is 2A or lower Compressor wiring is disconnected When PWM calculation results of 90 and an input current O flash PWM 90 or higher Outdoor unit s circuit board is faulty lower than the set value continue for 3 minutes or longer 3 time 23 Abnormal stop 3 times in Operation valve is closed When an abnormal stop occurs 3 times with automatic flash 20 minutes Compressor output is open phase recovery within 20 minutes after the outdoor unit s power O Electronic expansion valve is faulty supply was turned on Insufficient refrigerant 8 time 28 Wrong voltage Power supply construction is defective When the wrong voltage is applied O flash 9 time 29 Voltage drop Power supply construction is defective When the power supply voltage drops during operation oO flash Outdoor unit s circuit board is faulty ae 7 time 27 Outdoor Outdoor unit s fan motor Outdoor fan motor is faulty When a fan speed of 75 rpm or lower continues for 30 O flash fan motor is abnormal Connector connections are poor seconds or longer AA O error DC motor only Outdoor unit s circuit board is faulty times 3 time 1 time 31 Current Cooling current safe I Overcharge When there is a current safe stop in current safe I mode O flash flash safe Compressor loc uring cooling operation 2 time 32 Heating current safe I Overcharge When there
117. va 1 Pid I 0 6 l i l l I Applicable range 1 h 1 Sia r w 2 t sjoa ua z Sja gpa 35 s i Oo go 30 D k glee 2s Rms ol5 2 20 24 8 i ojo 15 14 1 16 18 20 22 1 Indoor air W B temperature C W B ISO T1 Standard Condition 1 l 6 I aae 27 alz 25 i 2 olga 20 k 20 2 389 s 2 7 glee 10 gt 10 5 0 5 10 15 Outdoor air W B temperature C W B ISO T1 Standard Condition 2 Correction of cooling and heating capacity in relation to one way length of refrigerant piping It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor units Piping length m 7 10 15 20 25 Cooling 1 0 0 99 0 975 0 965 0 95 Heating 1 0 1 0 1 0 1 0 1 0 3 Correction relative to frosting on outdoor heat exchanger during heating In additions to the foregoing corrections 1 2 the heating capacity needs to be adjusted also with respect to the frosting on the outdoor heat exchanger Air inlet temperature of outdoor unit in CWB Adjustment coefficient 0 95 0 94 0 93 0 91 0 88 0 86 0 87 0 92 1 00 How to obtain the cooling and heating capacity Example The net cooling capacity of the model SRK35ZD S with the piping length of 15m indoor wet bulb temperature at 19 0 C and outdoor dry bulb temperature 35 C is Net cooling capacity 3500 X 0 975 3413W x 1 0 SRK35Z
118. val 4 vi Discharge pipe temperature table Units C Timer lamp 1 s digit id s diel ol i l2l3 l4 5 l6 l7 8 l9 Buzzer sound minus 3 60 62 64 Yes 2 40 42 44 46 48 50 52 54 56 58 sounds for 0 1 second 1 20 22 24 26 28 30 32 34 36 38 0 2 4 6 ae 12 14 16 18 0 ol2 1416 ls 10 12 14 16 18 1 20 22 24 26 28 30 32 34 36 38 2 40 42 44 46 48 50 52 54 56 58 No 3 60 62 64 66 68 70 72 74 76 78 does not sound 4 s0 82 84 s6 8s 90 92 94 96 98 5 100 102 104 106 108 110 112 114 116 118 6 120 122 124 126 128 130 132 134 136 138 7 140 142 144 146 148 150 If no data are recorded error code is normal the displa y for each sensor becomes as shown below Sensor name Sen sor value displayed when the error code is normal Discharge pipe sensor temperature 64 C Example Outdoor discharge pipe temperature 122 C In the case of discharge pipe data multiply the reading value by 2 Below 61 x 2 122 C e temperature is lt 0 the buzzer sounds If the temperature is 2 0 the buzzer does not sound 0 1 sec ON If th Buzzer sound minus OFF ON Run lamp 10
119. y shows that the trouble has occurred once Does not occur O Automatic recovery occurs iv Remote controller information tables 1 Operation switching 2 Fan speed switching Display pattern when Display pattern when Fan speed in service mode Operation switching in service mode switching when when there is an there is an Run lamp abnormal stop Timer lamp abnormal stop Operation switching Fan speed switching 0 AUTO 0 AUTO 1 DRY 2 HI 2 COOL 3 MED 4 HEAT 4 LO 6 HI POWER 7 ECONO If no data are recorded error code is normal the information display in the remote controller becomes as follows Remote controller setting Display when error code is normal Operation switching AUTO Fan speed switching AUTO Example Operation switching fan speed switching cooling HI ON Run lamp 10 s digit OFF ON Timer lamp 1 s digit OFF 1 5 sec 11 second interval 40 v Indoor temperature sensor temperature indoor heat exchanger sensor temperature outdoor temperature sensor temperature outdoor liquid pipe sensor temperature table Units C Timer lamp 1 s digit 10 s digit rom eo Ve fe ne 2 Ve a ee a Buzzer sound minus 6 60 61 62 63 64 5 50 51 52 53 54 55 56 57 58 50 4 40 41 42 43 44 4

Alternative refrigerant R410A use models SRK25ZD-S, 35ZD

Contents

Download Pdf Manuals

Related Search

Related Contents