Mitsubishi Heavy Industries SRK60ZMX-S, Technical Manual

Page 1: ...TECHNICAL MANUAL INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR CONDITIONERS Split system air to air heat pump type SRK20ZMX S 25ZMX S 35ZMX S 50ZMX S 60ZMX S Manual No 13s SRK T 144 ...

Page 2: ...FSBUJPO 9 BVUP PQFSBUJPO 47 0QFSBUJPO DPOUSPM GVODUJPO CZ XJSFMFTT SFNPUF DPOUSPM MBQ BOE MPVWFS DPOUSPM 49 4FMFDUJPO PG UIF BOOVBM DPPMJOH GVODUJPO 48 OTUBMMJOH UXP BJS DPOEJUJPOFST JO UIF TBNF SPPN 47 VUP SFTUBSU GVODUJPO 6OJU 0 0 CVUUPO 47 46 4JMFOU NPEF OTUBMMBUJPO MPDBUJPO TFUUJOH JHIU TFUCBDL 0VUMJOF PG IFBUJOH PQFSBUJPO 0VUMJOF PG ESZ EFIVNJEJGZJOH PQFSBUJPO 0VUMJOF PG DPPMJOH PQFSBUJPO OTU...

Page 3: ...ity Cooling capacity 2 0kW Model name SRK Wall mounted type SRC Outdoor unit MX S 85 11 OPTION PARTS 97 12 TECHNICAL INFORMATION 85 91 1 Wired remote control RC E5 2 Interface kit SC BIKN E 3 Super link E board SC ADNA E 95 6 Service mode Trouble mode access function 66 7 Inspection procedures corresponding to detail of trouble 74 64 4 Troubleshooting procedure If the air conditioner runs 3 Troubl...

Page 4: ...ypropylene net washable x 2 Shock vibration absorber Rubber sleeve for fan motor Rubber sleeve for fan motor compressor Electric heater Operation control Remote control Wireless remote control Room temperature control Microcomputer thermostat Operation display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety equipments Compressor overheat protection Overcurrent protection Fros...

Page 5: ...ene net washable x 2 Shock vibration absorber Rubber sleeve for fan motor Rubber sleeve for fan motor compressor Electric heater Operation control Remote control Wireless remote control Room temperature control Microcomputer thermostat Operation display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety equipments Compressor overheat protection Overcurrent protection Frost prote...

Page 6: ...ene net washable x 2 Shock vibration absorber Rubber sleeve for fan motor Rubber sleeve for fan motor compressor Electric heater Operation control Remote control Wireless remote control Room temperature control Microcomputer thermostat Operation display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety equipments Compressor overheat protection Overcurrent protection Frost prote...

Page 7: ...lene net washable x 2 Shock vibration absorber Rubber sleeve for fan motor Rubber sleeve for fan motor compressor Electric heater Operation control Remote control Wireless remote control Room temperature control Microcomputer thermostat Operation display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety equipments Compressor overheat protection Overcurrent protection Frost prot...

Page 8: ...lene net washable x 2 Shock vibration absorber Rubber sleeve for fan motor Rubber sleeve for fan motor compressor Electric heater Operation control Remote control Wireless remote control Room temperature control Microcomputer thermostat Operation display RUN Green TIMER Yellow HI POWER Green 3D AUTO Green ECONO Blue Safety equipments Compressor overheat protection Overcurrent protection Frost prot...

Page 9: ...installation and service when viewing from the front Unit 15 Service space Service space Service space Terminal block Wired remote control Option Notes 1 The model name label is attached on the underside of the panel 2 It takes the interface kit SC BIKN E to connect the wired remote controller Unit mm Wireless remote control Hole on wall for right rear piping Hole on wall for left rear piping Gas ...

Page 10: ...n Ｉ Ｉ Ｉ Open 250 80 280 Ｉ Ｉ Ｉ 280 Open 80 75 Examplesof Dimensions installation Ｉ Ｖ 180 Open 80 Open Notes 1 It must not be surrounded by walls on the four sides 2 The unit must be fixed with anchor bolts An anchor bolt must not protrude more than 15mm 3 Where the unit is subject to strong winds lay it in such a direction that the blower outlet faces perpendicularly to the dominant wind direction ...

Page 11: ...2 The unit must be fixed with anchor bolts An anchor bolt must not protrude more than 15mm 3 Where the unit is subject to strong winds lay it in such a direction that the blower outlet faces perpendicularly to the dominant wind direction 4 Leave 1m or more space above 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 right si...

Page 12: ... 11 13 SRK T 144 3 Remote control Unit mm 60 26 167 a Wireless remote control ...

Page 13: ...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 Pearl White Exterior appearance Munsell color N8 5 near equivalent The pee...

Page 14: ...G Yellow Y Color Mark t Th21 Th22 Th3 LM1 LM2 SM FMI Heat exch sensor Humidity sensor 50 60 only Fan motor Room temp sensor Flap motor Th1 Th2 Th3 Diode stack DS Fuse F FMI Terminal block T Louver motor LM1 2 SM DS 1 2 Limit switch LS Inlet motor IM Description Item Varistor Va t t TO OUTDOOR UNIT HEAT EXCHANGER 1 2 N 3 POWER WIRES SIGNAL WIRE 1 2 N 3 Power source 1 Phase 220 240V 50Hz T IM Va U C...

Page 15: ...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 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 20 Model M...

Page 16: ...mption that a metal or plastic conduit is used with no more than three cables contained in 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 15 2 0 18 1 5 50 60 1 5mm x 3 2 Power cable indoor outdoor connecting wires Model MAX running current Power cable size ...

Page 17: ...0 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 C 9612 Mike position at highest noise level in position as mentioned below Distance from front side 1m Mike position 0 8m 1m Unit Mike position Center Low points Mike position at highest nois...

Page 18: ... 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 P a 10 20 30 40 50 60 70 N50 N40 N60 N70 N20 N30 Cooling Heating Condition ISO T1 JIS C 9612 Mike position at highest noise level in position as mentioned below Distance from front side 1m Mike position 0 8m 1m Unit Mike position Center Low points Mike ...

Page 19: ...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 Mike position at highest noise level in position as mentioned below Distance from front side 1m Mike position 0 8m 1m Unit Mike position Center Low points Mike ...

Page 20: ...B A Cooling Heating Condition ISO T1 JIS C 9612 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 P a 10 20 30 40 50 60 70 N50 N30 N40 N60 N70 N20 Mike ...

Page 21: ...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 Mike position at highest noise level in position as mentioned below Distance from front side 1m Mike position 0 8m 1m Unit Mike position Center Low points Mike ...

Page 22: ...s TH2 Heat exchanger sensor TH1 EEV Capillary tube Heat exchanger Accumulator Strainer Models SRK20ZJX S 25ZJX S 35ZJX S Indoor unit Outdoor unit Flare connection Flare connection Liquid pipe φ6 35 Gas pipe φ9 52 Service valve Heat exchanger Heat exchanger sensor Electronic expansion valve Liquid Strainer Muffler Capillary tube Outdoor air temp sensor Muffler Muffler Compressor Accumulator Dischar...

Page 23: ...tion Approximately 15 to 46 D B Heating operation Approximately 15 to 24 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 specification Correction factors as follows 1 Coefficient of cooling and heating capaci...

Page 24: ...sting on outdoor heat exchanger during heating How to obtain the cooling and heating capacity Piping length m Cooling Heating 7 1 0 1 0 10 0 99 1 0 15 0 975 1 0 20 0 965 1 0 25 0 95 1 0 30 0 935 1 0 Air inlet temperature of outdoor unit in CWB Adjustment coefficient 15 0 95 0 95 0 94 0 93 0 91 0 88 0 86 0 87 0 92 1 00 10 9 7 5 3 1 1 3 5 or more ZMX S ZMX S ...

Page 25: ... 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 33 2 55 2 42 2 61 2 48 2 77 2 63 2 89 2 65 36 2 08 1 98 2 22 2 11 2 43 2 30 2 52 2 39 2 58 2 45 2 74 2 60 2 86 2 64 38 2 01 1 91 2 15 2 04 2 36 2 24 2 46 2 34 2 52 2 39 2 69 2 55 2 81 2 60 39 1 97 1 88 2 11 2 01 2 33 2 21 2 43 2...

Page 26: ...t conducted continuously Note 1 These data show the case where the operation frequency of a compressor is fixed Cooling only 2 Capacities are based on the following conditions 2 Corresponding refrigerant piping length 7m 2 Level difference of Zero 3 Symbols are as follows TC Total cooling capacity kW SHC Sensible heat capacity kW HC Heating capacity kW Indoor air temperature Indoor air temperature...

Page 27: ...manual t Locations where the unit is exposed to chimney smoke t Locations at high altitude more than 1000m high t Locations with ammonic atmospheres t Locations where heat radiation from other heat source can affect the unit t Locations without good air circulation t Locations with any obstacles which can prevent inlet and outlet air of the unit t Locations where short circuit of air can occur in ...

Page 28: ...nstallation 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 wall 1 5cm 5 ø65 Indoor side Outdoor side Indoor side Outdoor side In...

Page 29: ... 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 Arrange the drain hose in a downward angle Avoid the following drain piping Pour water to the drain pan located under the heat exchanger and ensure that the water is dis...

Page 30: ...rt batteries Close the cover 1 2 3 Setting an indoor unit 1 2 3 Turn off the power supply and turn it on after 1 minute Point the wireless remote control that was set according to the procedure described on the left side at the indoor unit and send a signal by pressing the ACL switch on the wireless remote control Since the signal is sent in about 6 seconds after the ACL switch is pressed point th...

Page 31: ...circuit t 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 t Do not open the service valves for liquid line and gas line until completed refrigerant piping work air tightness test and evacuation If the compressor is operated in state of operation service valves before com...

Page 32: ...without good air circulation Locations with any obstacles which can prevent inlet and outlet air of the unit Locations where short circuit of air can occur in case of multiple units installation Locations where strong air blows against the air outlet of outdoor unit Locations where something located above the unit could fall It can cause remarkable decrease in performance corrosion and damage of c...

Page 33: ...es A place where stringent regulation of electric noises is applicable Where it is safe for the drain water to be discharged Where noise and hot air will not bother neighboring residents Where snow will not accumulate Where strong winds will not blow against the outlet pipe A place where no TV set or radio receiver is placed within 1m If electrical interference is caused seek a place less likely t...

Page 34: ...a side cover and remove to the front A B Flared pipe end A mm ø6 35 ø9 52 ø12 7 Copper pipe outer diameter 0 A 04 9 1 13 2 16 6 ø6 35 ø9 52 ø12 7 Copper pipe outer diameter 0 0 5 1 0 1 5 Copper pipe protrusion for flaring B mm In the case of a rigid clutch type With an R410A tool With a conventional tool CAUTION Do not apply force beyond proper fastening torque in tightening the flare nut Tighteni...

Page 35: ...A Handle Hi Vacuum pump Vacuum pump adapter Anti reverse flow type Designed specifically for R410A Charge hose Designed specifically for R410A Check joint 0 1MPa 76cmHg Handle Lo Service valve Service valve Liquid side Service valve cap Service valve cap Service valve cap tightening torque N m Check joint blind nut tightening torque N m ø6 35 1 4 ø9 52 3 8 ø12 7 1 2 20 30 25 35 10 12 Service valve...

Page 36: ...ply cables use conduits Do not lay electronic control cables wireless remote control and signaling wires and other cables together outside the unit Laying them together can result in the malfunctioning or a failure of the unit due to electric noises Fasten cables so that may not touch the piping etc When cables are connected make sure that all electrical components within the electrical component ...

Page 37: ...th leakage circuit breaker h t r a E h t r a E Power supply Indoor unit Outdoor unit When wire length exceeds 30m use 2 5mm2 wires Model SRC ZM S Model SRC ZMX S N L D1 D2 D3 C D1 D2 D3 Safety breaker 16A Earth leakage circuit breaker Power supply DRED Outdoor unit 1 2 N 3 1 2 N 3 Indoor unit When wire length exceeds 30m use 2 5mm2 wires Model SRC ZMA S Model SRC ZMXA S Model DXC ZMA S C Connectin...

Page 38: ...e Does the existing pipe system to reuse satisfy all of the following 1 The pipe length is 30m or less 2 The pipe size conforms to the table of pipe size restrictions 3 The elevation difference between the indoor and outdoor units conforms to the following restrictions Where the outdoor unit is above 15m or less Where the outdoor unit is below 15m or less Which of the following refrigeration oils ...

Page 39: ...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 t Do not open the service valves for liquid line and gas line until completed refrigerant piping work air tightness test and evacuation If the compressor is operated in state of operation service valves before completed connection of refrige...

Page 40: ...lation Locations with any obstacles which can prevent inlet and outlet air of the unit Locations where short circuit of air can occur in case of multiple units installation Locations where strong air blows against the air outlet of outdoor unit Locations where something located above the unit could fall It can cause remarkable decrease in performance corrosion and damage of components malfunction ...

Page 41: ...place where the unit can be kept away 5m or more from TV set and or radio receiver in order to avoid any radio or TV interference A place where good air circulation can be secured and enough service space can be secured for maintenance and service of the unit safely A place where the unit will not be affected by electromagnetic waves and or high harmonic waves generated by other equipment A place ...

Page 42: ... and remove to the front A B Flared pipe end A mm ø6 35 ø12 7 Copper pipe outer diameter 0 A 04 9 1 16 6 ø6 35 ø12 7 Copper pipe outer diameter 0 0 5 1 0 1 5 Copper pipe protrusion for flaring B mm In the case of a rigid clutch type With an R410A tool With a conventional tool CAUTION Do not apply force beyond proper fastening torque in tightening the flare nut Tightening angle Tightening torque N ...

Page 43: ...specifically for R410A Compound pressure gauge Pressure gauge Gauge manifold Designed specifically for R410A Handle Hi Vacuum pump Vacuum pump adapter Anti reverse flow type Designed specifically for R410A Charge hose Designed specifically for R410A Check joint 0 1MPa 76cmHg Handle Lo Service valve Service valve Liquid side Service valve cap Service valve cap Service valve cap tightening torque N ...

Page 44: ...ogether can result in the malfunctioning or a failure of the unit due to electric noises t Fasten cables so that may not touch the piping etc t When cables are connected make sure that all electrical components within the electrical component box are free of loose connector coupling or terminal connection and then attach the cover securely Improper cover attachment can result in malfunctioning or ...

Page 45: ...inal connections Grounding terminals are provided in the control box N L 1 2 N 3 1 2 N 3 Safety breaker 16A Earth leakage circuit breaker h t r a E h t r a E Power supply Indoor unit Outdoor unit Model SRC ZMX S N L D1 D2 D3 C D1 D2 D3 Safety breaker 16A Earth leakage circuit breaker Power supply DRED Outdoor unit 1 2 N 3 1 2 N 3 Indoor unit Model SRC ZMXA S C Connecting cable between outdoor unit...

Page 46: ...s OK Remove Check whether an existing pipe system is reusable or not by using the following flow chart Are not there any loose pipe supports Are there any branch pipes with no indoor unit connected NO Please consult with our distributor in the area if you need to recover refrigerant and charge it again Any combinations of pipe sizes not listed in the table are not usable If you obtain a negative f...

Page 47: ...nous button TEMPERATURE button AIR FLOW UP DOWN button TIME SET UP switch SLEEP button CLEAN switch ON TIMER button TIMER button ACL switch PROGRAM button Operation section HI ECO button AIR FLOW LEFT RIGHT button SILENT button OFF TIMER button WEEKLY button FAN SPEED button 3D AUTO button NIGHT SETBACK button SET Child Lock button CANCEL button Transmission section Each time the button is pressed...

Page 48: ...to restart is disabled See the diagram at right Jumper wire J170 Function operation mode Indoor temperature setting Fan speed Flap Louver Timer Switch COOL About 24ºC Auto Auto Continuous DRY About 25ºC HEAT About 26ºC Unit ON OFF button Reception pip When two air conditioners are installed in the room use setting when the two air conditioners are not operated with one wireless remote control Set ...

Page 49: ...ll start from the set time d When the following operation are set HIGH POWER operation will be canceled When the HI POWER ECONO button is pressed again When the 3D AUTO botton is pressed When the operation mode is changed When the SILENT botton is pressed When it has been 15 minutes since HIGH POWER operation has started When the NIGHT SETBACK botton is pressed e Not operable while the air conditi...

Page 50: ...angle 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 control display HEAT Approx 5 Approx 20 Approx 20 Approx 35 Approx 35 Approx 45 Approx 75 Swing Flap stopped Approx 45 Approx 60 Approx 60...

Page 51: ...assed the air flow direction is determined according to the indoor temperature and setting temperature b During DRY Operation including auto DRY operation Cooling Air flow selection Operation mode AUTO HI MED LO 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...

Page 52: ...ng unit is running press the ON OFF button to stop The installation location setting cannot be made while the unit is running ii Press the AIR FLOW UP DOWN button and the AIRFLOW LEFT RIGHT button together for 5 seconds or more The installation location display illuminates iii Setting the air conditioning installation location Press the AIR FLOW LEFT RIGHT button and adjust to the desired location...

Page 53: ... prevent blowing of cool wind However if the fan speed setting is HI and room temperature is 19ºC or higher this control is not executed ON OFF ON ON ON OFF few minutes ON ON ON HOT KEEP OFF OFF 3 minutes ON OFF OFF Thermostat ON Thermostat OFF Failure Heating Compressor Indoor fan motor Outdoor fan motor 4 way valve 12 106rps 12 106rps 12 74rps 12 42rps SRK50ZMX S 30 115rps 30 115rps 30 76rps 30 ...

Page 54: ...p operation Max 16 minutes and 50 seconds 5 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 1 2 3 and 5 above and the outdoor air temperature is 3ºC or less are satisfied note that when the temperature for outdoor heat exchanger sensor TH1 is 5ºC...

Page 55: ...tion mode and then begins in the automatic operation 16 Outline of dry dehumidifying operationion a Purpose of DRY mode The purpose is Dehumidification and not to control the humidity to the target condition Indoor outdoor unit control the operation condition to reduce the humidity and also prevent over cooling b Outline of control i Indoor unit fan speed and compressor are controlled by the area ...

Page 56: ...ng dehumidifying or by 2 C dur ing heating a Dew prevention control Ⅱ Cooling Prevents dewing on the indoor unit SRK50 60ZMX S only i Operating conditions When the following conditions have been met for more than 30 minutes after starting operation 1 Compressor s command speed is 28 rps or higher 2 Detected value of humidity is 68 or higher ii Contents of operation 1 Air capacity control Note 1 Ra...

Page 57: ...r 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 OFF the speed is reduced to 0 rps iii Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature is lower than 40ºC 2 The compressor command speed is 0 rps Notes...

Page 58: ...es for 20 seconds while the compressor command speed is other than 0 rps ii Detail of operation 1 The lower limit of the compressor command speed is set to 44 30 45 35 rps and even if the speed be comes lower than 44 30 45 35 rps the speed is kept to 44 30 45 35 rps However when the thermo OFF the speed is reduced to 0 rps 2 The upper limit of the compressor command speed is set to 50 60 60 75 rps...

Page 59: ...PSmin 97 48 5 56 55 5 58 61 97 RPSmin 104 48 5 55 5 51 5 58 53 5 61 104 RPSmin 115 48 5 42 1 51 5 44 53 5 47 3 61 115 RPSmin 42 1 44 47 3 61 Note 1 RPSmin The lower one between the outdoor speed and the compressor command speed Models SRK20 35 A B C D RPSmin 50 45 52 54 5 61 50 RPSmin 115 45 52 57 61 51 5 115 RPSmin 120 45 43 52 50 57 51 5 120 RPSmin 43 50 55 51 5 Models SRK50 60 Unit ºC Note 1 RP...

Page 60: ...ng low outdoor temperature protective control iii Reset conditions 10 8 2 2 Lower limit 45 rps Lower limit 40 rps Normal operation Outdoor air temperature C 11 13 16 17 Normal operation Protective control ON1 Protective control ON2 Outdoor air temperature C Model SRK50 Models SRK20 35 i ޓ Operating conditions When the outdoor air temperature TH2 is lower than 4ºC or 13ºC or higher continues for 30...

Page 61: ...d 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 95 105ºC even when the compressor command speed is maintained for 3 min utes when the temperature is in the range of 90 100ºC 95 105ºC the speed is raised by 1 rps and kept at that speed for 3 minutes This process is repeated until the comma...

Page 62: ...i 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 m 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 min 1 or under for more than 30 seconds the unit enters first in the stop mode and then stops the entire system q Outdoor fan...

Page 63: ...ion of the defrost control 2 Other than the defrost control 3 When after meeting the conditions of 1 and 2 above the compressor speed indoor temperature Th1 and in door heat exchanger temperature Th2 have met the conditions in the following table for 5 minutes Compressor speed N Operation mode Cooling SRK20 35 SRK50 60 Heating 2 Indoor temperature Th1 Th1 4 Th2 Indoor temperature Th1 Indoor heat e...

Page 64: ... 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT 1 Cautions 2 Items to check before troubleshooting 3 Troubleshooting procedure If the air conditioner does not run at all Important YES YES YES NO NO NO NO YES Reference Reference AC proced wireless ...

Page 65: ... 64 13 SRK T 144 09 SRK DB 087D 4 Troubleshooting procedure If the air conditioner runs NO NO NO NO YES YES YES YES 65 66 72 66 72 ...

Page 66: ...outdoor unit s fan motor speed continues for 30 seconds or longer at 75 min 1 or lower 3 times The air conditioner stops Defective fan motor poor connector connection Outdoor fan motor error 7 time flash ON ON E 48 When the value of the outdoor heat exchanger sensor exceeds the set value Overload operation overcharge Broken outdoor heat exchange sensor wire Service valve is closed Cooling high pre...

Page 67: ... 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 control information operation switching fan speed switching are recorded when trouble occurs so more detailed information ca...

Page 68: ... Fan speed mode mode mode 21ºC 22ºC 23ºC 24ºC 25ºC 1 time previous previous time 2 times previous 3 times previous 4 times previous 5 times previous Only for indoor heat exchanger sensor 2 Indicates the number of occasions previous to the present the error display data are from Temperature setting 26ºC 27ºC 28ºC 29ºC 30ºC 1 time previous previous time 2 times previous 3 times previous 4 times prev...

Page 69: ...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 times p...

Page 70: ...rent 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 Number of flashes when in service mode RUN light 10 s digit TIMER light 1 s digit Stop coad or Error coad Error content Cause Oc...

Page 71: ...N HEAT TIMER light 1 s digit Display pattern when in service mode Fan speed mode when there is an abnormal stop 2 time flash 3 time flash 4 time flash AUTO HI MED LO 5 time flash ULO 6 time flash 7 time flash operation mode and fan speed mode becomes as follows HI POWER ECONO Mode Operation mode Fan speed mode 0 5 sec 1 5 sec RUN light 10 s digit TIMER light 1 s digit 11 second interval 0 5 sec OF...

Page 72: ... 84 94 55 45 35 25 15 5 5 15 25 35 45 55 65 75 85 95 56 46 36 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 Sensor name Room temperature sensor Indoor heat exchanger sensor Outdoor air temperature sensor Outdoor heat exchanger sensor 64ºC 64ºC 64ºC 64ºC...

Page 73: ...6 126 146 48 28 8 8 28 48 68 88 108 128 148 50 30 10 10 30 50 70 90 110 130 150 52 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 Sensor value displayed when the error code is normal 64ºC 0 5 sec 0 1 sec 1 5 sec 11 second interval 0 5 sec OFF ON OFF ON OFF ON temperature information data Buzzer sound If...

Page 74: ... 73 13 SRK T 144 09 SRK DB 087D Service data record form 67 Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless Wireless r ...

Page 75: ...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 80 for the fan motor and indoor PCB check pro Power supply reset Is it normalized Malfunction by temporary noise Replace...

Page 76: ... 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 84 SRC20 35 1 703Ω U V V W U W or more at 20ºC SRC50 60 0 864Ω U V V W U W or more at 20ºC ...

Page 77: ... 76 13 SRK T 144 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 74 ...

Page 78: ... Outdoor fan motor error Defective fan motor connector poor connection defective outdoor PCB See pages 84 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 ourdoor...

Page 79: ...Defective outdoor PCB Replace NO YES YES Is the space for installation of indoor and or outdoor unit enough Is there any short circuit of air on indoor and or outdoor unit At heating does the indoor fan motor run Is the filter clogged Is there any liquid flooding Is there any anomalous sound on the compressor After resetting power for several times does it become normal Temporary noise may cause o...

Page 80: ... Heating Ourdoor air temperature sensor Cooling Heating Discharge pipe sensor All modes Defrosting is performed for 10 minutes at approx 35 minutes Defrosting is performed for 10 minutes at approx 35 minutes Compressor stop The compressor cannot pick up its speed owing to the current safe so that the designed capacity is not achieved The compressor cannot pick up its speed owing to the heating ove...

Page 81: ...d 20V Replace indoor PCB YES 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 Measuring point Resistance when normal Measuring point Voltage range when normal k M ...

Page 82: ...k then the operation Faulty part other than fan motor YES Fan motor is faulty YES YES YES NO NO NO Replace the faulty part and the fuse Test run then the unit for checking Is there any damage on the internal circuit of fan motor Check the resistance value to judge See pages 80 to 84 Is the fuse blown on the indoor and outdoor PCB Is there any faulty part fan motor etc See pages 79 to 84 Replace th...

Page 83: ...nsistor Remove the fasten terminal and test output voltage Inspection of outdoor fan motor See page 84 Check point of outdoor unit Color Color symbol OR Mark Brown BR Yellow Green Y G Black BK Blue BL White WH Red RD Orange Display Voltage range Voltage check in PCB The normal range is as follows DC280V DC230V DC310V DC220V DC218V DC222V DC213V DC212V DC214V DC215V DC214V DC216V DC225V DC224V DC22...

Page 84: ...oltage Inspection of outdoor fan motor See page 84 Check point of outdoor unit Color Color symbol OR Mark Brown BR Yellow Green Y G Black BK Blue BL White WH Red RD Orange Display Voltage range Voltage check in PCB The normal range is as follows DC280V DC230V DC310V DC220V DC218V DC222V DC213V DC212V DC214V DC215V DC214V DC216V DC225V DC224V DC226V DC 2 5V DC 2 3V DC22 5V M T2 BK WH RD V W U M CNT...

Page 85: ...ansion valve as a separate unit Measuring point Resistance when normal b Outdoor unit fan motor check procedure Measuring point Voltage range when normal DC15V DC several 4 7V Outdoor PCB GND DC308 336V CNFAN Red Black White Yellow Blae FM0 1 2 3 i ii iii DC iv i Fan motor resistance check Measuring point Resistance when normal k ii Black Black ...

Page 86: ...in part of remote control lower case with 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 control co terminal block Connect the terminal of remo with the terminal of indoor uni X and Y are no polarity Wiring route is as shown in th depending on the pulling out d The wiring inside the remote c The sheath sh...

Page 87: ...the terminal block Connect the terminal of remote control 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 control case should be within 0 3mm2 recommended to 0 5mm2 The sheath should be peeled off inside the remote control case The peeling off length of each wire is as...

Page 88: ...econds 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 fixed uppe...

Page 89: ...n 04 accordingly You can select the louver stop position in the four The louver can stop at any position In normal working indication indoor unit temperature is indicated instead of airflow Only the master remote control can be indicated Heating preparation indication should not be indicated Temperature indication is by degree C Temperature indication is by degree F ON OFF button finished Start St...

Page 90: ...5 C increase 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 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 fan...

Page 91: ...ON SET will be displayed Press SET button Selecct FUNCTION remote control function or I U FUNCTION indoor unit function Operation message Function description setting description Function No Fixing button Finishing button 7 2 1 Starting button Previous screen button Indoor unit selection button Press SET button 6 DATA LOADING Indication with blinking Display is changed to 01 7 DATA LOADING Blinkin...

Page 92: ...utions 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 such as death major injury or envirommental destruction Symbols used in these precautions After completed ins...

Page 93: ...unit approximately 1 8m 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 procured locally and connection cables in the wall Mount the lower casing of the interface to the electrica...

Page 94: ... external remote control unit procured locally to CNT terminal In case of the pulse input switch OFF the DIP switch SW2 1 on the interface PCB When setting operation permission prohibition mode switch OFF the DIP switch SW2 3 on the interface PCB Connection of super link E board Functions of CNT connector Switch ON the DIP switch SW2 2 Factory setting ON on the interface PCB Wiring connection betw...

Page 95: ...ll the wired remote control with reference to the attached instruction manual of wired remote control B 0 3mm2 x 2 core cable should be used for the wiring of wired remote control 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 0mm...

Page 96: ... 95 13 SRK T 144 WARING CAUTION 3 Super link E board SC ADNA E F ...

Page 97: ... 96 13 SRK T 144 ...

Page 98: ...ting limit COPd 2 40 Declared capacity for heating Warmer season at indoor Declared coefficient of performance Warmer season at indoor temperature 20㷄 and outdoor temperature Tj temperature 20㷄 and outdoor temperature Tj Tj 2㷄 Pdh kW Tj 2㷄 COPd Tj 7㷄 Pdh kW Tj 7㷄 COPd Tj 12㷄 Pdh kW Tj 12㷄 COPd Tj bivalent temperature Pdh kW Tj bivalent temperature COPd Tj operating limit Pdh kW Tj operating limit ...

Page 99: ...Pd 2 40 Declared capacity for heating Warmer season at indoor Declared coefficient of performance Warmer season at indoor temperature 20㷄 and outdoor temperature Tj temperature 20㷄 and outdoor temperature Tj Tj 2㷄 Pdh kW Tj 2㷄 COPd Tj 7㷄 Pdh kW Tj 7㷄 COPd Tj 12㷄 Pdh kW Tj 12㷄 COPd Tj bivalent temperature Pdh kW Tj bivalent temperature COPd Tj operating limit Pdh kW Tj operating limit COPd Declared...

Page 100: ...d 2 40 Declared capacity for heating Warmer season at indoor Declared coefficient of performance Warmer season at indoor temperature 20㷄 and outdoor temperature Tj temperature 20㷄 and outdoor temperature Tj Tj 2㷄 Pdh kW Tj 2㷄 COPd Tj 7㷄 Pdh kW Tj 7㷄 COPd Tj 12㷄 Pdh kW Tj 12㷄 COPd Tj bivalent temperature Pdh kW Tj bivalent temperature COPd Tj operating limit Pdh kW Tj operating limit COPd Declared ...

Page 101: ...Pd 2 70 Declared capacity for heating Warmer season at indoor Declared coefficient of performance Warmer season at indoor temperature 20㷄 and outdoor temperature Tj temperature 20㷄 and outdoor temperature Tj Tj 2㷄 Pdh kW Tj 2㷄 COPd Tj 7㷄 Pdh kW Tj 7㷄 COPd Tj 12㷄 Pdh kW Tj 12㷄 COPd Tj bivalent temperature Pdh kW Tj bivalent temperature COPd Tj operating limit Pdh kW Tj operating limit COPd Declared...

Page 102: ...Pd 2 50 Declared capacity for heating Warmer season at indoor Declared coefficient of performance Warmer season at indoor temperature 20㷄 and outdoor temperature Tj temperature 20㷄 and outdoor temperature Tj Tj 2㷄 Pdh kW Tj 2㷄 COPd Tj 7㷄 Pdh kW Tj 7㷄 COPd Tj 12㷄 Pdh kW Tj 12㷄 COPd Tj bivalent temperature Pdh kW Tj bivalent temperature COPd Tj operating limit Pdh kW Tj operating limit COPd Declared...

Page 103: ...itioning Refrigeration Systems 16 5 Konan 2 chome Minato ku Tokyo 108 8215 Japan http www mhi co jp 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 ...