Mitsubishi Heavy Industries SRC20ZJX-SA, Technical Manual

Page 1: ...T 098 INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR CONDITIONERS Split system air to air heat pump type Indoor unit Outdoor unit SRK25ZJ S SRC25ZJ SA SRK35ZJ S SRC35ZJ SA SRK20ZJX S SRC20ZJX SA SRK25ZJX S SRC25ZJX SA SRK35ZJX S SRC35ZJX SA ...

Page 2: ... 2 Models SRK20ZJX S 25ZJX S 35ZJX S 32 8 2 Installation of outdoor unit 36 9 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 43 6 3D auto operation 46 7 Timer operation 47 9 1 Models SRK25 35ZJ S 43 44 1 Operation control function by remote controller 5 Flap and louver control 45 4 Custom cord switching procedure 44 3 Auto restart function 2 Unit ON OFF button 44 43 8 Installation location setting ...

Page 3: ...the air conditioner does not run at all 69 10 1 Cautions 69 10 2 Items to check before troubleshooting 69 10 10 How to make sure of wireless remote controller 86 10 11 Outdoor unit inspection points 87 10 5 Self diagnosis table 71 10 6 Service mode Trouble mode access function 72 10 8 Phenomenon observed after shortcircuit wire breakage on sensor 84 10 7 Inspection procedures corresponding to deta...

Page 4: ...V 110W Operation control Operation switch Wireless Remote control Room temperature control Microcomputer thermostat Operation Display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green Safety devices Compressor overheat protection Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Heating overload protection High pressure control Cooling overl...

Page 5: ...eater 230V 110W Operation control Operation switch Wireless Remote control Room temperature control Microcomputer thermostat Operation Display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green Safety devices Compressor overheat protection Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Heating overload protection High pressure control Cool...

Page 6: ...Defrost heater 230V 110W Operation control Operation switch Wireless Remote control Room temperature control Microcomputer thermostat Operation Display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety devices Compressor overheat protection Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Heating overload protection High p...

Page 7: ...r Defrost heater 230V 110W Operation control Operation switch Wireless Remote control Room temperature control Microcomputer thermostat Operation Display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety devices Compressor overheat protection Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Heating overload protection High...

Page 8: ...er Defrost heater 230V 110W Operation control Operation switch Wireless Remote control Room temperature control Microcomputer thermostat Operation Display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety devices Compressor overheat protection Overcurrent protection Frost protection Serial signal error protection Indoor fan motor error protection Heating overload protection Hig...

Page 9: ...Outlet for down piping 㧔Refer to the above view㧕 Hole on wall for right rear piping Hole on wall for left rear piping Gas piping Outlet for wiring Drain hose Liquid piping F E C D B Symbol A 㧔Ǿ65㧕 VP16 Ǿ6 35㧔1㧛4 㧕㧔Flare㧕 Content 㧔Ǿ65㧕 Ǿ9 52㧔3㧛8 㧕㧔Flare㧕 Outlet for piping㧔on both side㧕 G Unit mm غ 120 19 60 150 17 3 G 790 60 14 5 45 31 60 45 798 294 229 3 45 60 9 100 106 5 585 106 5 50 48 9 55 47 4...

Page 10: ...on both side㧕 G D C A E B Wired remote controller 㧔Option㧕 Notes㧔1㧕The model name label is attached ޓޓ ޓ on the underside of the panel Wireless remote controller ޓ 㧔2㧕It takes the interface kit 㧔SC BIKN E㧕 ޓޓ ޓ to connect the wired remote controller Terminal block Ǿ9 52 㧔3㧛8 㧕 㧔Flare㧕 881 9 59 9 26 20 9 59 9 46 5 61 5 46 5 61 5 890 309 9 61 5 3 220 50 120 650 120 100 220 450 220 35 35 48 9 222 5 4...

Page 11: ... 250 Open 㧵 㧵 㧵 Open 250 80 280 㧵 㧵 㧵 280 Open 80 75 Examples of Dimensions installation 㧵 㨂 180 Open 80 Open Ǿ9 52㧔3㧛8 㧕㧔Flare㧕 Content C Pipe㧛cable draw out hole D1 E Anchor bolt hole Drain discharge hole Symbol B A Service valve connection㧔gas side㧕 M10 4places Ǿ20 2places D2 Drain discharge hole Ǿ16 9places Service valve connection㧔liquid side㧕 Ǿ6 35㧔1㧛4 㧕㧔Flare㧕 Unit mm A C Terminal block B 4...

Page 12: ...the unit 5 A wall in front of the blower outlet must not exceed the units height 6 The model name label is attached on the lower right corner of the front panel φ9 52 3 8 Flare Content C Pipe cable draw out hole E Anchor bolt hole Drain discharge hole Symbol B A Service valve connection gas side M10 4places φ20 2places Service valve connection liquid side φ6 35 1 4 Flare D1 Drain discharge hole φ1...

Page 13: ... 12 10 SRK T 098 2 3 Remote controller a Wireless remote controller 60 17 150 Unit mm 60 17 3 150 ٨The wireiess remote controller in the following figure shows for the SRK series ...

Page 14: ...kness 100 to 200m 0 5mm2 2 cores 0 75mm2 2 cores 1 25mm2 2 cores 2 0mm2 2 cores Under 300m Under 400m Under 600m Upper part Lower part Lower case Sheath Upper cace Board Wiring Upper Lower X Y Sheath Upper cace Board Wiring Upper Lower Y X Tighten the screws after cutting off the thin part of screw mounting part Embedded mounting The peeling off length of sheath The peeling off length of sheath In...

Page 15: ... t o 2 t o R AMP 2 HEAT EXCHANGER 5 FMI SMI LM1 LM2 F Va ThI Th2 Th3 T DS 㨪 㨪 Blue Black BK Red BL RD White WH Yellow㧛Green Y㧛G Color Mark Heat exch sensor Fan motor Room temp sensor Flap motor Diode stack DS Fuse F Connector CNE CNY FMI Terminal block T Description Item Varistor Va LM1 2 SMI Louver motor ThI Th2 3 Yellow Y Humidity sensor HD Power Source 1 Phase 220㧛230㧛240V 50Hz RWA000Z226 3 ELE...

Page 16: ...BK t Th2 1 Th2 2 Th3 LM1 LM2 SM1 SM2 FMI DS t t TO OUTDOOR UNIT HEAT EXCHANGER 1 2㧛N 3 POWER WIRES SIGNAL WIRE 1 2 N 3 Power source 1 phase 220 240 V 50Hz T Color Marks Blue Black BK Red BL RD White WH Yellow㧛Green Y㧛G Yellow Y Color Mark Heat exch sensor Humidity sensor 㧔50 60 only㧕 Fan motor Room temp sensor Flap motor Th1 Th2 Th3 Diode stack DS Fuse F Connector CNE CNY FMI Terminal block T Louv...

Page 17: ...n a conduit and a voltage drop is 2 For an installation falling outside of these conditions please follow the internal cabling regulations Adapt it to the regulation in effect in each country 25 9 8 2 0 32 1 5mm2 x 3 1 5mm2 35 0 1㨪220㨺240V 50Hz 1㨪220V 60Hz POWER SOURCE 㧔BK㧕 C 2 G1 㧔RD㧕 㧔 㧛 㧕 S IN 㧔WH㧕 R IN 㧔BK㧕 㧔WH㧕 㧔RD㧕 PWB ASSY 250V 20A F2 F3 250V 1A F4 250V 10A F1 250V 2A CIRCUIT PAM SWITCHING ...

Page 18: ...ling Heating Condition ISO T1 JIS C9612 10 20 30 40 50 60 70 63 125 250 500 1000 2000 4000 8000 1000 2000 4000 8000 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 10 20 30 40 50 60 70 63 125 250 500 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 Sound Pressure Level dB standard 2 10 5 Pa Sound Pressure Level dB standard 2 10 5 Pa Mid Octave Band frequency Hz Mid Octave Band frequency Hz Model SRK25ZJ ...

Page 19: ...B A Cooling Heating Condition ISO T1 JIS C9612 10 20 30 40 50 60 70 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 10 20 30 40 50 60 70 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 Sound Pressure Level dB standard 2 10 5 Pa Sound Pressure Level dB standard 2 10 5 Pa Mid Octave Band frequency Hz Mid Octave Band frequency Hz Model S...

Page 20: ...d frequency Hz Sound Pressure Level dB standard 2 10 5 P a 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 Outdoor Unit Model SRC20ZJX SA Noise Level Cooling 47 dB A Heating 47 dB A 10 20 30 40 50 60 70 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Sound Pressure Level dB standard 2 10 5 Pa 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 Cooling Heating Condition ISO T1 JIS C9612 ...

Page 21: ...nd frequency Hz Sound Pressure Level dB standard 2 10 5 Pa 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 Outdoor Unit Model SRC25ZJX SA Noise Level Cooling 47 dB A Heating 47 dB A 10 20 30 40 50 60 70 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Sound Pressure Level dB standard 2 10 5 Pa 10 20 30 40 50 60 70 N50 N40 N60 N70 N20 N30 Cooling Heating Condition ISO T1 JIS C9612 ...

Page 22: ... dB A Cooling Heating Condition ISO T1 JIS C9612 10 20 30 40 50 60 70 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Sound Pressure Level dB standard 2 10 5 Pa 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 10 20 30 40 50 60 70 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Sound Pressure Level dB standard 2 10 5 Pa 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 ...

Page 23: ... 22 10 SRK T 098 09 SRK DB 087D 5 PIPING SYSTEM Model SRK25ZJ S SRC25ZJ SA Model SRK35ZJ S SRC35ZJ SA Humidity sensor HD 5 PIPING SYSTEM ...

Page 24: ...onic expansion valve Liquid Strainer Capillary tube Outdoor air temp sensor Muffler Muffler Compressor Accumlator Discharge pipe temp sensor Cooling cycle Heating cycle Check joint 4way valve Service valve Heat exchanger sensor Th22 TH3 Room temp sensor Th1 Th21 Gas TH2 Heat exchanger sensor TH1 EEV Capillary tube Heat exchanger Muffler Models SRK20ZJX S 25ZJX S 35ZJX S SRC20ZJX SA 25ZJX SA 35ZJX ...

Page 25: ...ion Approximately 15 to 21 D B Refer to the selection chart 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 specication Correction factors as follows 1 Coefcient of cooling and heating capacity in relation to temperatures 0 6 0 7 0 8 0 9 1 0...

Page 26: ...SDFLW QHHGV WR EH DGMXVWHG DOVR ZLWK UHVSHFW WR WKH IURVWLQJ RQ WKH RXWGRRU KHDW H FKDQJHU How to obtain the cooling and heating capacity DPSOH 7KH QHW FRROLQJ FDSDFLW RI WKH PRGHO 65 6 ZLWK WKH SLSLQJ OHQJWK RI P LQGRRU ZHW EXOE WHPSHUDWXUH DW Û DQG RXWGRRU GU EXOE WHPSHUDWXUH Û LV 1HW FRROLQJ FDSDFLW HQJWK P DFWRU E DLU WHPSHUDWXUHV Piping length m Cooling Heating 7 1 0 1 0 10 0 99 1 0 15 0 975 ...

Page 27: ... 3 45 3 42 3 38 3 34 15 CWB 3 79 3 75 3 73 3 69 3 65 20 CWB 4 07 4 04 4 02 3 97 3 94 Heat Mode Air flow outdoor air temp indoor air temp 16 CDB 18 CDB 20 CDB 22 CDB 24 CDB Hi 12 8 m3 min 15 CWB 2 46 2 41 2 35 2 30 2 25 10 CWB 2 79 2 74 2 70 2 63 2 58 5 CWB 3 02 2 97 2 91 2 88 2 83 0 CWB 3 16 3 12 3 06 3 02 2 98 5 CWB 4 03 3 98 3 96 3 88 3 83 6 CWB 4 09 4 04 4 00 3 95 3 90 10 CWB 4 35 4 31 4 28 4 2...

Page 28: ... 2 72 26 2 42 2 30 2 56 2 43 2 72 2 59 2 80 2 62 2 86 2 60 2 99 2 76 3 10 2 71 28 2 35 2 24 2 49 2 37 2 67 2 53 2 75 2 60 2 81 2 58 2 95 2 75 3 06 2 70 30 2 29 2 17 2 43 2 31 2 61 2 48 2 69 2 56 2 75 2 56 2 90 2 74 3 01 2 69 32 2 22 2 11 2 36 2 24 2 55 2 42 2 64 2 50 2 70 2 54 2 85 2 70 2 96 2 67 34 2 15 2 04 2 29 2 18 2 49 2 36 2 58 2 45 2 64 2 51 2 79 2 65 2 91 2 65 35 2 12 2 01 2 26 2 14 2 46 2...

Page 29: ...llation inspection and maintenance specified in the manual Insufficient space can result in accident such as personal injury due to falling from the installation place For installation work be careful not to get injured with the heat exchanger piping flare portion or screws etc Be sure to insulate the refrigerant pipes so as not to condense the ambient air moisture on them Insufficient insulation ...

Page 30: ...ntral rear of the unit Left hand side piping Right hand side piping Installation of Installation board Drilling of holes and fixture of sleeve Option parts Level position 2 locations Mating mark for level surface Fixing on concrete wall Use of nut anchor Use of bolt anchor Shaping of pipings Taping of the exterior Pipings Drain hose Top Nut M6 Mounting board Mounting board Max 10 Thickness of the ...

Page 31: ...ntional R22 flare tool ø6 35 ø9 52 ø12 7 0 0 0 5 0 0 0 5 0 0 0 5 1 0 1 5 1 0 1 5 1 0 1 5 1 5 2 0 1 5 2 0 2 0 2 5 Measurement B mm Clutch type Wing nut type CAUTION Do not apply excess torque to the flared nuts Otherwise the flared nuts may check depending ٤ Arrange the drain hose in a downward angle ٤ Avoid the following drain piping ٤ Pour water to the drain pan located under the heat exchanger a...

Page 32: ...pplied with an optional Interface connection kit SC BIKN E and fasten the connection harness onto the indoor control box with the clamp supplied with the kit For more details please refer to the user s manual of your Interface connection kit SC BIKN E 1 2 3 INSTALLATION TEST CHECK POINTS After installation The power supply voltage is correct as the rating No gas leaks from the joints of the operat...

Page 33: ...tion between setting plate and indoor unit Install at location that meets the following conditions after getting approval from the customer Where there is no obstructions to the air flow and where the cooled and heated air can be evenly 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 sec...

Page 34: ... there is no affected by the TV and radio etc Do not place where exposed to direct sunlight or near heat devices such as a stove Hold the bottom of the piping and fix direction before stretching it and shaping it Drill a hole with whole core drill In case of rear piping draw out cut off the lower and the right side portions of the sleeve collar Tape only the portion that goes through the wall Alwa...

Page 35: ...o gas leaks from the joints of the operational valve Power cables and crossover wires are securely fixed to the terminal board Operational valve is fully open The pipe joints for indoor and outdoor pipes have been insulated Connection wiring Earth wiring Outer tape Refrigerant piping Drain hose Wood screw Clamp Cover the exterior portion with outer tape and shape the piping so it will match the co...

Page 36: ...perational valve is fully open The pipe joints for indoor and outdoor pipes have been insulated Connection wiring Earth wiring Outer tape Refrigerant piping Drain hose Wood screw Clamp Cover the exterior portion with outer tape and shape the piping so it will match the contours of the route that the piping to take Also fix the wiring and pipings to the wall with clamps Removing Remove the air inle...

Page 37: ... failure and serious accidents due to burst of the refrigerant circuit Tighten the flare nut by torque wrench with specified method If the flare nut were tightened with excess torque this may cause burst and refrigerant leakage after a long period Do not open the operation valves for liquid line and gas line until completed refrigerant piping work air tightness test and evacuation If the compresso...

Page 38: ...where discharged hot air or operating sound of the outdoor unit can bother neighborhood Locations where outlet air of the outdoor unit blows directly to plants Locations where vibration can be amplified and transmitted due to insufficient strength of structure Locations where vibration and operation sound generated by the outdoor unit can affect seriously on the wall or at the place near bed room ...

Page 39: ...re must be a 1 meter or larger space in the above When more than one unit are installed side by side provide a 250mm or wider interval between them as a service space In order to facilitate servicing of controllers please provide a sufficient space between units so that their top plates can be removed easily Where a danger of short circuiting exists install guide louvers When more than one unit ar...

Page 40: ...brazing When pipe is brazing 3 Refrigerant pipe wall thickness and material Select refrigerant pipes of the table shown on the right wall thickness and material as specified for each pipe size Pipe diameter mm Minimum pipe wall thickness mm Pipe material 6 35 0 8 O type pipe 9 52 0 8 O type pipe NOTE Phosphorus deoxidized seamless copper pipe ICS 23 040 15 ICS 77 150 30 Select pipes having a wall ...

Page 41: ...b Then raise the pressure to 1 5 MPa and stop Leave it for five more minutes to see if the pressure drops c Then raise the pressure to the specified level 4 15 MPa and record the ambient temperature and the pressure d If no pressure drop is observed with an installation pressurized to the specified level and left for about one day it is acceptable When the ambient Temperature fall 1 the pressure a...

Page 42: ... Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country Do not use any supply cord lighter than one specified in parentheses for each type below braided cord code designation 60245 IEC 51 ordinary tough rubber sheathed cord code designation 60245 IEC 53 flat twin tinsel cord code designation 602...

Page 43: ...nits with heaters refer to the installation instructions or the construction instructions of the indoor unit Switchgear or Circuit breaker capacity which is calculated from MAX over current should be chosen along the regulations in each country The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables contained in a conduit and a vo...

Page 44: ...on ACL switch This switch is for resetting microcomputer and setting time OFF TIMER button This button selects OFF TIMER operation TEMPERATURE button These buttons sets the indoor temperature These buttons are used for setting the current time and timer function as well This button cancels the ON timer OFF timer and SLEEP operation CANCEL button The above illustration shows all controls but in pra...

Page 45: ...peration b Details of operation 3 ޓ Auto restart function a b 1 2 4 ޓ Custom cord switching procedure a Modifying the indoor printed circuit board b Modifying the wireless remote controller 1 2 Cut Function operation mode Indoor temperature setting Fan speed Flap Louver Timer Switch Cooling Thermal dry Heating ...

Page 46: ...ox 50 Approx 60 Approx 60 Angle of Flap from Horizontal Center installation Remote controller display Right end installation Left end installation Angle of Louver Left Approx 50 Left Approx 50 Left Approx 20 Left Approx 45 Center Left Approx 30 Right Approx 20 Center Right Approx 50 Right Approx 20 Left Approx 20 Center Right Approx 30 Right Approx 45 Right Approx 50 Louver stopped Swing Spot Wide...

Page 47: ...p down Swing Heating Center Fixed Wide Fixed Flap Louver Cooling Heating Horizontal blowing Fixed Slant forwardl blowing Fixed Operation mode Indoor temp Setting temp 2 C Setting temp Indoor temp 2 C At heating At cooling Air flow direction contorol 2 C Setting temp Indoor temp 5 C 2 C Indoor temp Setting temp 5 C Indoor temp Setting temp 5 C Setting temp Indoor temp 5 C The control in 4 continues...

Page 48: ...ng unit is running press the ON OFF button to stop 2 Press the AIR FLOW UP DOWN button and the AIR FLOW LEFT RIGHT button together for 5 seconds or more 3 Setting the air conditioning installation location 4 Press the ON OFF button Airflow range Airflow range Airflow range Left End Installation Center Installation Right End Installation Center Installation Right End Installation Left End Installat...

Page 49: ... minutes ON OFF OFF Thermostat ON Thermostat OFF Failure Heating Compressor Indoor fan motor Outdoor fan motor 4 way valve c Defrosting operation 1 a b c d e a b 2 30 115rps 30 115rps 30 76rps 30 46rps SRK35ZJ S 30 115rps 30 115rps 30 72rps 30 42rps SRK25ZJ S Model Fan speed Auto MED HI LO a b c e 16 minutes and 50 seconds 20 20 15 10 5 0 5 10 15 10 5 0 Outdoor air temperature Outdoor heat exchang...

Page 50: ...s 20 98rps 20 58rps 20 38rps SRK35ZJ S 20 74rps 20 74rps 20 55rps 20 34rps SRK25ZJ S Model Fan speed Auto MED HI LO 11 ޓ Outline of automatic operation a Determination of operation mode Heating Dehumidifying Cooling Indoor air temperature C Outdoor air temperature C A When both the indoor and the outdoor air temperatures are in the range A cooling or heating is switched depending on d e a b 2 a b ...

Page 51: ...essor running the lower limit The lower limit of compressor command speed is set to 30 or 40 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 30 or 40 rps However when the thermo becomes OFF the speed is reduced to 0 rps b 1 2 3 c d 18 0 18 30 Heating Dehumidifying Indoor air temperature C Outdoor air temperature C Signals of wireless remot...

Page 52: ...zzy First time Since the seconds times Outdoor air temperature C A B C D E F a b a b than 50 44 30 rps the speed is kept to 50 44 30 rps However when the thermo becomes OFF the speed is 2 Detail of operation 3 Reset conditions c Cooling high pressure control 1 Purpose 2 Detector 3 Detail of operation 53 58 63 Outdoor heat exchanger temperature C 6rps 1 6rps 1 0rps After lapse of 30 sec or over 3 A...

Page 53: ...lt becomes lower than that after fuzzy calculation the speed is kept to 40 rps However when the thermo becomes OFF the speed is reduced to 0 prs rps a Operating conditions b Detail of operation When the outdoor air temperature TH2 is 11ºC or higher continues for 30 seconds while the compressor command speed other than 0 rps i Taking the upper limit of compressor command speed range at 78 rps if th...

Page 54: ...ssor command speed is change as shown in the figure belo Lower limit 29 rps Normal operation 4 6 Outdoor air temperature C c Reset conditions a b 10 09 SRK DB 087D h Compressor overheat protection 1 Purpose 2 Detail of operation a Discharge pipe temperature C Example Fuzzy 90 100 110 b i Current safe 1 Purpose 2 Detail of operation j Current cut 1 Purpose 2 Detail of operation k Outdoor unit failu...

Page 55: ... stopped by this function ti is not 1 2 09 SRK DB 087D m Serial signal transmission error protection 1 Purpose 2 Detail of operation n Rotor lock o Outdoor fan motor protection p Outdoor fan control at low outdoor temperature Cooling 1 Operating conditions 2 Detail of operation 3 Reset conditions Heating Outdoor temperature 10 C Outdoor temperature 10 C Outdoor fan a b a b c ...

Page 56: ...TH1 temperature is lower than 2 0ºC 3 Outdoor air temperature sensor TH2 temperature is lower than 0ºC 4 Outdoor air temperature at 0ºC Difference between the outdoor air temperature and the outdoor heat exchanger sensor temperature is larger than 4ºC Outdoor air temperature higher than 5ºC and lower than 0ºC Difference between the outdoor air temperature and the outdoor heat exchanger sensor temp...

Page 57: ...EAR button ACL switch This switch is for resetting microcomputer and setting time OFF TIMER button This button selects OFF TIMER operation TEMPERATURE button These buttons sets the indoor temperature These buttons are used for setting the current time and timer function as well This button cancels the ON timer OFF timer and SLEEP operation CANCEL button The above illustration shows all controls bu...

Page 58: ...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 J170 AUTO RESTART is cut auto restart is disabled See the diagram at right 4 Custom cord switching procedure If two wireless remote controller are installed in one room in order to prevent wrong opera tion due to mixed signals please modify the pri...

Page 59: ...gle is memorized in the microcomputer the flap or louver will automatically be set at this angle when the next operation is started e When not operating The flap returns to the position of air flow directly below when operation has stopped COOL DRY FAN Remote controller display HEAT Approx 5 Approx 20 Approx 20 Approx 35 Approx 35 Approx 45 Approx 75 Swing Flap stopped Approx 45 Approx 60 Approx 6...

Page 60: ... is determined according to the indoor temperature and setting temperature b During DRY Operation including auto DRY operation At cooling Air flow selection Operation mode AUTO HI MED LO At heating Indoor temp Setting temp 5 C Indoor temp Setting temp 5 C Setting temp Indoor temp 5 C Setting temp Indoor temp 5 C HIGH POWER AUTO HI MED LO HIGH POWER AUTO Flap Louver Cooling Up down Swing Heating Wi...

Page 61: ...not toward the side walls If you set the remote controller installation position keep it so that the air flow is within the range shown in the following figure a Setting 1 If the air conditioning unit is running press the ON OFF button to stop The installation location setting cannot be made while the unit is running 2 Press the AIR FLOW UP DOWN button and the AIRFLOW LEFT RIGHT button together fo...

Page 62: ...or 4 way valve 30 115rps 30 115rps 30 76rps 30 46rps SRK35ZJX S 30 102rps 30 102rps 30 72rps 30 42rps SRK25ZJX S 30 94rps 30 94rps 30 66rps 30 40rps SRK20ZJX S Model Fan speed Auto MED HI LO c Defrosting operation 1 Starting conditions Defrosting operation can be started only when all of the following conditions are met a After start of heating operation When it elapsed 45 minutes Accumulated comp...

Page 63: ...erature and the outdoor air temperature determines the operation mode and then begins in the automatic operation Heating Dehumidifying Cooling Indoor air temperature C Outdoor air temperature C Max 16 minutes and 50 seconds Heating operation Defrast operation Depends on an operation condition the time can be longer than 7 minutes 2 7 minutes Hot keep operation e During continuous compressor operat...

Page 64: ... indoor heat exchanger temperature is in the range of 2 5 5ºC the speed is reduced by 4 rps at each 20 seconds 2 When the temperature is lower than 2 5ºC the compressor is stopped 3 When the indoor heat exchanger temperature is in the range of 5 8ºC the compressor command speed is been maintained Indoor heat exchanger temperature Item 5 C or lower 2 5 C or lower Lower limit of compressor command s...

Page 65: ...ure protective control 1 Operating conditions When the outdoor air temperature TH2 is 22ºC or lower continues for 20 seconds while the compressor command speed is other than 0 rps 2 Detail of operation a The lower limit of the compressor command speed is set to 44 30 rps and even if the speed becomes lower than 44 30 rps the speed is kept to 44 30 rps However when the thermo becomes OFF the speed ...

Page 66: ...t exchanger sensor Th2 3 Detail of operation A B C D Indoor heat exchanger temperature C 4rps 1 8rps 2 8rps 2 4rps 1 0rps After lapse of 20 sec or over 3 After lapse of 20 sec or over 3 After lapse of 20 sec or over 3 lower limit speed 30 rps Example Fuzzy Notes 1 When the indoor heat exchanger temperature is in the range of B C ºC the speed is reduced by 4 rps at each 20 seconds 2 When the indoor...

Page 67: ... 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 in the range of 90 100ºC even when the compressor command speed is maintained for 3 minutes when the temperature is in the range of 90 100ºC the speed is raised by 1 rps and kept at that speed for 3 minutes This process is rep...

Page 68: ...If the outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on l 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 p Outdoor fan con...

Page 69: ...nditions 1 4 have been met for 1 minute continuously with the compressor frequency at 0 rps or higher 1 Operation is in the heating mode 2 Outdoor heat exchanger sensor TH1 temperature is lower than 2 0ºC 3 Outdoor air temperature sensor TH2 temperature is lower than 0ºC 4 Outdoor air temperature at 0ºC Difference between the outdoor air temperature and the outdoor heat exchanger sensor temperatur...

Page 70: ... 087D 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT 10 1 Cautions 10 2 Items to check before troubleshooting 10 3 Troubleshooting procedure If the air conditioner does not run at all Important YES YES YES NO NO NO NO YES Reference Reference ...

Page 71: ... 70 10 SRK T 098 09 SRK DB 087D 10 4 Troubleshooting procedure If the air conditioner runs NO NO NO NO YES YES YES YES 71 72 78 72 78 ...

Page 72: ...ower is turned on or when there is no signal for 7 minute 35 seconds or longer during operation the compressor is stopped Defective power supply Broken signal wire defective indoor outdoor PCB Error of signal transmission If the compressor motor s magnetic pole positions cannot be correctly detected when the compressor starts The air conditioner stops Defective compressor Open phase on compressor ...

Page 73: ...n indoor unit Data are recorded for up to 5 previous occurrences Data which are older than the 5th previous occurrence are erased In addition data on the temperature of each sensor room temperature indoor heat exchanger outdoor heat exchanger outdoor air temperature discharge pipe remote controller information operation switching fan speed switching are recorded when trouble occurs so more detaile...

Page 74: ...VZLWFKLQJ 0 872 2 0 872 LVSOD V WKH UHDVRQ IRU VWRSSLQJ GLVSOD LQ WKH SDVW HUURU FRGH LVSOD V WKH URRP WHPSHUDWXUH VHQVRU WHPSHUDWXUH DW WKH WLPH WKH HUURU FRGH ZDV GLVSOD HG LQ WKH SDVW LVSOD V WKH LQGRRU KHDW H FKDQJHU VHQVRU WHPSHUDWXUH DW WKH WLPH WKH HUURU FRGH ZDV GLVSOD HG LQ WKH SDVW LVSOD V WKH UHPRWH FRQWUROOHU LQIRUPDWLRQ DW WKH WLPH WKH HUURU FRGH ZDV GLVSOD HG LQ WKH SDVW LVSOD V WKH ...

Page 75: ...on for the stop stop code 2 times previous when the air conditioner was stopped by protective stop control Displays the reason for the stop stop code 3 times previous when the air conditioner was stopped by protective stop control Displays the reason for the stop stop code 4 times previous when the air conditioner was stopped by protective stop control Displays the reason for the stop stop code 5 ...

Page 76: ...4 time flash Outdoor air temperature sensor is abnormal 38 8 time flash Outdoor unit s fan motor is abnormal 48 8 time flash Current safe 58 8 time flash Connection lines between the indoor and outdoor units are faulty 61 1 time flash Serial transmission error 62 2 time flash Discharge pipe sensor is abnormal anomalous stop 39 9 time flash Rotor lock 60 OFF 5 times 3 times 3 times 3 times 2 times ...

Page 77: ... controller information tables 2SHUDWLRQ VZLWFKLQJ RUN light Operation switching Display pattern when in service mode Operation switching when there is an abnormal stop 0 1 2 4 3 AUTO DRY COOL FAN HEAT DQ VSHHG VZLWFKLQJ TIMER light Fan speed switching Display pattern when in service mode Fan speed switching when there is an abnormal stop 0 2 3 4 6 7 AUTO HI MED LO HI POWER ECONO I QR GDWD DUH UHF...

Page 78: ...26 16 6 6 16 26 36 46 56 66 76 86 96 57 47 37 27 17 7 7 17 27 37 47 57 67 77 87 97 58 48 38 28 18 8 8 18 28 38 48 58 68 78 88 98 59 49 39 29 19 9 9 19 29 39 49 59 69 79 89 99 No does not sound I QR GDWD DUH UHFRUGHG HUURU FRGH LV QRUPDO WKH GLVSOD IRU HDFK VHQVRU EHFRPHV DV VKRZQ EHORZ Sensor name Room temperature sensor Indoor heat exchanger sensor Outdoor air temperature sensor Outdoor heat exch...

Page 79: ...32 12 12 32 52 72 92 112 132 54 34 14 14 34 54 74 94 114 134 56 36 16 16 36 56 76 96 116 136 58 38 18 18 38 58 78 98 118 138 No does not sound I QR GDWD DUH UHFRUGHG HUURU FRGH LV QRUPDO WKH GLVSOD IRU HDFK VHQVRU EHFRPHV DV VKRZQ EHORZ Sensor value displayed when the error code is normal 64ºC DPSOH LVFKDUJH SLSH WHPSHUDWXUH Q WKH FDVH RI GLVFKDUJH SLSH GDWD PXOWLSO WKH UHDGLQJ YDOXH E HORZ 0 5 se...

Page 80: ... 79 10 SRK T 098 09 SRK DB 087D Service data record form 73 ...

Page 81: ...0 70 0 10 Discharge pipe sensor temperature characteristics Indoor fan motor error Broken sensor wire connector poor connection 0 0 20 40 60 80 100 120 135 20 40 60 80 100 120 140 160 180 Temperature C Resistance k Defective fan motor connector poor connection defective indoor PCB 85 for the fan motor and indoor PCB check pro Power supply reset Is it normalized Malfunction by temporary noise Repla...

Page 82: ...or lock Compressor wiring short circuit Compressor output is open phase Outdoor PCB is faulty Service valve is closed EEV is faulty Compressor faulty Current safe stop Overload operation compressor lock overcharge 88 86 1 703Ω U V V W U W or more at 20ºC ...

Page 83: ... 82 10 SRK T 098 09 SRK DB 087D Over heat of compressor Gas shortage defective discharge pipe sensor Error of signal transmission Wiring error including power cable defective indoor outdoor PCB 80 ...

Page 84: ...page 81 Outdoor fan motor error Defective fan motor connector poor connection defective outdoor PCB See pages 88 for the fan motor and outdoor PCB check pro After making sure the fan motor and outdoor PCB are nor Power supply reset Is it normalized Malfunction by temporary noise Replace fan motor If the error persists after replacing the fan motor replace the outdoor PCB the fan motor and outdoor ...

Page 85: ...ailure mode Control input circuit resding Air conditioning system operation See page 81 Note 1 SRK35ZJ S only Rotor lock 10 8 Phenomenon observed after shortcircuit wire breakage on sensor a Indoor unit Defective compressor defective outdoor PCB Sensor Operation mode Phenomenon Shortcircuit Disconnected wire Room temperature sensor Cooling Heating Heat exchanger sensor Cooling Heating Humidity sen...

Page 86: ... YES NO NO NO b Indoor unit fan motor check procedure 1 Indoor PCB output check 2 Fan motor resistance check FMI DC15V Indoor PCB DC 308 336V DC several V 4 6 V CNU GND Blue Yellow White Black Red Sensor Operation mode Phenomenon Shortcircuit Disconnected wire Heat exchanger sensor Cooling Heating Ourdoor air temperature sensor Cooling Heating Discharge pipe sensor All modes Measuring point Resist...

Page 87: ...tem burns wiring mistakes etc If 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 below can be measured the power transistor and the circuit board for the outdoor unit are normal Example RUN light ON TIMER light 2 time flash Measure in this section Operat...

Page 88: ...26H CNHEAT TH1TH2 TH3 EEV FMo CM t t t L L N 1 3 2 N T Indoor unit Power source 1 Phase 220 240V 50Hz Check point of outdoor unit CAUTION HIGH VOLTAGE High voltage is produced in the control box Don t touch electrical parts in the control box for 5 minutes after the unit is stopped Inspection power transistor Remove the fasten terminal and test output voltage Inspection of outdoor fan motor See pa...

Page 89: ...DQ PRWRU HUURU LV GHWHFWHG GLDJQRVH ZKLFK RI WKH RXWGRRU XQLW IDQ PRWRU RU RXWGRRU 3 LV GHIHFWLYH LDJQRVH WKLV RQO DIWHU FRQ UPLQJ WKDW WKH LQGRRU XQLW LV QRUPDO 2XWGRRU 3 RXWSXW FKHFN 7XUQ RII WKH SRZHU LVFRQQHFW WKH RXWGRRU XQLW IDQ PRWRU FRQQHFWRU 1 1 KHQ WKH LQGRRU XQLW LV RSHUDWHG E LQVHUWLQJ WKH SRZHU VXSSO SOXJ DQG SUHVVLQJ 21 WKH EDFNXS VZLWFK IRU PRUH WKDQ VHFRQGV LI WKH YROWDJH RI SLQ 1R...

Page 90: ...a nipper or knife and grind burrs with a file etc Install the lower case to the flat wall with attached two wooden screws Connect the remote controller co terminal block Connect the terminal of remote c with the terminal of indoor unit X X and Y are no polarity Wiring route is as shown in the rig depending on the pulling out dire The wiring inside the remote cont The sheath should be peeled off Th...

Page 91: ...nnect the remote controller cord to the terminal block Connect the terminal of remote controller X Y with the terminal of indoor unit X Y X and Y are no polarity Wiring route is as shown in the right diagram depending on the pulling out direction The wiring inside the remote controller case should be within 0 3mm2 recommended to 0 5mm2 The sheath should be peeled off inside the remote controller c...

Page 92: ...er three seconds The indication changes to FUNCTION SET 2 Press button once and change to the TEMP RANGE indication 3 Press SET button and enter the temperature range setting mode 4 Select UPPER LIMIT or LOWER LIMIT by using button 5 Press SET button to fix 6 When UPPER LIMIT is selected valid during heating Press SET button to fix Indication example UPPER 26 C Displayed for two seconds After the ...

Page 93: ...e four The louver can stop at any position In normal working indication indoor unit temperature is indicated instead of airflow Only the master remote controller can be indicated Heating preparation indication should not be indicated Temperature indication is by degree C Note 1 The mark cannot use SRK Series Temperature indication is by degree F ON OFF button finished Start Stop air conditioner an...

Page 94: ...ease in return air temperature of indoor unit To be reset producing 1 0 C increase in return air temperature of indoor unit To be reset producing 1 5 C increase in return air temperature of indoor unit To be reset producing 2 0 C increase in return air temperature of indoor unit When heating thermostat is OFF to be operated with low fan speed or with ultra low fan speed in case of some models When...

Page 95: ...he FUNCTION SET will be displayed Press SET button Selecct FUNCTION remote controller function or I U FUNCTION indoor unit function Operation message Function description setting description Function No Fixing button Finishing button 7 2 1 6 Starting button Previous screen button Indoor unit selection button Press SET button 6 DATA LOADING Indication with blinking Display is changed to 01 GRILLE S...

Page 96: ... an electric shock fire and sersonal injury Warnings Warning Always go along these instruction Safety precautions Before use please read these Safety Precautions thoroughly before installation All the cautionary items mentioned below are important safety related items to be taken into consideration so be sure to observe them at all times Incorrect installation could lead to serious consequences su...

Page 97: ...ly 1 3m from the indoor unit Be sure not to extend the connection cable on site If the connection cable is extended malfunction may occur Fix the interface on the wall pillar or the like Cut out the punch outs for the connection cables running into the casing with cutter Recess the electrical box locally procured and connection cables in the wall Mount the lower casing of the interface to the elec...

Page 98: ...re round cable Vinyl insulated wirevinyl sheathed cable for control It is available to operate the air conditioning unit and to monitor the operation status with the external control unit remote display by sending the input output signal through CNT connector on the indoor control PCB Connect a external remote control unit locally procured to CNT terminal In case of the pulse input switch OFF the ...

Page 99: ...should be used for the wiring of wired remote controller C Maximum length of wiring is 600m If the length of wiring exceeds 100m change the size of cable as mentioned below 100m 200m 0 5mm2 x 2 core 300m or less 0 75mm2 x 2 core 400m or less 1 25mm2 x 2 core 600m or less 2 0mm2 x 2 core However cable size connecting to the terminal of wired remote controller should not exceed 0 5mm2 Accordingly if...

Page 100: ... 99 10 SRK T 098 11 3 Super link E board SC ADNA E F SL2NA E and SL3N AE BE to control ...

Page 101: ... 100 10 SRK T 098 ...

Page 102: ...ng Refrigeration Systems Headquarters 16 5 2 chome Kounan Minato ku Tokyo 108 8215 Japan Fax 03 6716 5926 Copyright MITSUBISHI HEAVY INDUSTRIES LTD Because of our policy of continuous improvement we reserve the right to make changes in all specifications without notice C ...