Mitsubishi Heavy Industries SRR25ZM-S Technical Manual
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Mitsubishi Heavy Industries SRR25ZM-S Technical Manual

Inverter ceiling concealed type residential air-conditioners
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updated April 10, 2017
TECHNICAL MANUAL
TECHNICAL MANUAL
INVERTER CEILING CONCEALED TYPE
RESIDENTIAL AIR-CONDITIONERS

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Summary of Contents for Mitsubishi Heavy Industries SRR25ZM-S

  • Page 1 updated April 10, 2017 TECHNICAL MANUAL TECHNICAL MANUAL INVERTER CEILING CONCEALED TYPE RESIDENTIAL AIR-CONDITIONERS...

  • Page 2: Table Of Contents

    '15 • SR-T-185 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor units (2) Outdoor units .................................... 3. ELECTRICAL WIRING ................10 (1) Indoor units ..................10 (2) Outdoor units ..................11 4. NOISE LEVEL .................... 12 5. CHARACTERISTICS OF FAN ..............
  • Page 3 '15 • SR-T-185 ..44 (3) Troubleshooting procedure (If the air-conditioner does not run at all) ..... 45 (4) Troubleshooting procedure (If the air-conditioner runs) (5) Self-diagnosis table ................46 (6) Service mode (Trouble mode access function) ........47 (7) Inspection procedures corresponding to detail of trouble ....

  • Page 4: Specifications

    '15 • SR-T-185 1. SPECIFICATIONS Model SRR25ZM-S Model SRR25ZM-S Item Indoor unit SRR25ZM-S Outdoor unit SRC25ZMX-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.5 ( 1.0 (Min.) - 3.3 (Max.)) Nominal heating capacity (range) 3.4 ( 1.4 (Min.) - 4.8 (Max.)) Cooling 0.570 ( 0.21 - 0.86 )
  • Page 5 '15 • SR-T-185 Model SRR35ZM-S Model SRR35ZM-S Item Indoor unit SRR35ZM-S Outdoor unit SRC35ZMX-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 3.5 ( 1.0 (Min.) - 3.9 (Max.)) Nominal heating capacity (range) 4.2 ( 1.5 (Min.) - 5.2 (Max.)) Cooling 0.980 ( 0.21 - 1.20 ) Power consumption...
  • Page 6 '15 • SR-T-185 2. EXTERIOR DIMENSIONS (1) Indoor units Models SRR25ZM-S, 35ZM-S 660 （ Inlet dimension） Symbol Content φ9.52 （ 3／8"） （ Flare） Gas piping φ6.35 （ 1／4"） （ Flare） Liquid piping VP25 （ I.D.25 , O.D.32） Drain piping （Used with attached connector）...

  • Page 7: Indoor Units (2) Outdoor Units

    Notes Symbol Content （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 Service valve connection（gas side） φ9.52（3／8"）（Flare） protrude more than 15mm. Service valve connection（liquid side） φ6.35（1／4"）（Flare） 　（3）...
  • Page 8 '15 • SR-T-185 (3) Remote control (a) Wireless remote control Unit : mm...
  • Page 9 '15 • SR-T-185 (b) Wired remote control (option parts) Interface kit (SC-BIKN-E) is required to use the wired remote control. (i) Model RC-E5 Wiring outlet Cut off the upper thin part of remote control lower case with a nipper or knife, and grind burrs with a file etc.
  • Page 10 '15 • SR-T-185 (ii) Model RC-EX1A Installation space Exterior appearance Pearl White (Munsell color) (N8.5) near equivalent R/C cable：0.3mm × 2-core RoHS Adapted to directive PJZ000Z297...

  • Page 11: Electrical Wiring

    Item Description Connector INTERFACE KIT SC-BIKN PRINTED CIRCUIT Fan motor BOARD Room temp. sensor F 0.16A Heat exchanger sensor L 250V S／N Diode stack 1〜 Fuse Terminal block Y／G Drain motor F 3.15A L 250V Float switch Varistor Color Marks Mark Color Black...

  • Page 12: Outdoor Units

    TO INDOOR UNIT POWER WIRES SIGNAL WIRE PCB ASSY PCB1 TERMINAL Power source POWER BLOCK TRANSISTOR 1Phase AC 220ｰ240V 50Hz 250V 15A （BK） （BK）R.IN （RD） 250V 20A （WH） NOISE （WH） 3～ S.IN FILTER （BK） （Y／G） （RD） C-2 SWITCHING F3 250V 1A 250V 3.15A POWER CIRCUIT...

  • Page 13: Noise Level

    '15 • SR-T-185 4. NOISE LEVEL Model SRR25ZM-S Condition ISO5151 T1,JIS C 9612 ◦Sound pressure level ① MODE Rated capacity value (Indoor Unit) ●Mike position Model SRR25ZM-S Unit Cooling 37 dB(A) Noise 1.5m Level Heating 40 dB(A) × ..Cooling...
  • Page 14 '15 • SR-T-185 Condition ISO5151 T1,JIS C 9612 MODE Rated capacity value ◦Sound pressure level ② ●Mike position (Indoor Unit) Model SRR25ZM-S Unit Return duct Cooling 31 dB(A) Supply duct Noise 1.5m Level Heating 33 dB(A) External staic pressure : 10Pa ×...
  • Page 15 '15 • SR-T-185 Model SRR35ZM-S Condition ISO5151 T1,JIS C 9612 ◦Sound pressure level ① MODE Rated capacity value (Indoor Unit) ●Mike position Model SRR35ZM-S Unit Cooling 38 dB(A) Noise 1.5m Level Heating 42 dB(A) × ..Cooling Heating Mike position 0.8m Unit Mike position...
  • Page 16 '15 • SR-T-185 Condition ISO5151 T1,JIS C 9612 MODE Rated capacity value ◦Sound pressure level ② ●Mike position (Indoor Unit) Model SRR35ZM-S Unit Return duct Cooling 33 dB(A) Supply duct Noise 1.5m Level Heating 34 dB(A) External staic pressure : 10Pa ×...

  • Page 17: Characteristics Of Fan

    Capillary tube Strainer Muffler Flare connection Air flow (m /min) Air flow (m /min) 6. PIPING SYSTEM Models SRK20ZJX-S, 25ZJX-S, 35ZJX-S Models SRR25ZM-S, 35ZM-S Cooling cycle Heating cycle Indoor unit Outdoor unit Outdoor air Flare temp. sensor connection Service valve...

  • Page 18: Range Of Usage & Limitations

    '15 • SR-T-185 7. RANGE OF USAGE & LIMITATIONS RANGE OF USAGE & LIMITATIONS Model SRR25ZM-S, 35ZM-S Item Cooling operation : Approximately 18 to 32℃ D.B. Indoor return air temperature Heating operation : Approximately 10 to 30℃ D.B. (Upper, lower limits) (Refer to the selection chart) Cooling operation : Approximately -15 to 46℃...
  • Page 19 '09•SRK-DB-087D '15 • SR-T-185 (2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping Piping length [m] Cooling 0.99 0.975 0.965 0.95 0.935 Heating (3) Correction relative to frosting on outdoor heat exchanger during heating Air inlet temperature of 5 or more outdoor unit in °C WB...

  • Page 20: Capacity Tables

    '15 • SR-T-185 8. CAPACITY TABLES Model SRR25ZM-S Cooling Mode (kW) ting (kW) Indoor air temp. Outdoor Outdoor Indoor air temp. Air flow air temp. ℃DB ℃DB ℃DB ℃DB ℃DB ℃DB ℃DB air temp. Air flow (℃WB) ℃ DB 18℃ DB 20℃ DB 22℃ DB 24℃ DB ℃WB...

  • Page 21: Application Data

    9. APPLICATION DATA (1) Installation of indoor unit RJJ012A002 FOR MODEL SRR SERIES R410A REFRIGERANT USED INSTALLATION MANUAL FOR INDOOR UNIT CAUTION • Carry out the electrical work for ground lead with care. Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults such as electric shocks due to short-circuiting.
  • Page 22 • Locations where an equipment affected by high harmonics is placed (TV During operation the refrigerant pipes become extremely hot or extremely If air enters in the refrigerant circuit, the pressure in the refrigerant circuit Touching rotating equipments, hot surfaces or high voltage parts can becomes too high, which can cause burst and personal injury.
  • Page 23 RJJ012A002 INSTALLATION OF INDOOR UNIT Adjustment for horizontality Air inlet and outlet size Installing the main unit Securing the suspension bolts ○ Either use a level vial, or adjust the level according to the method below. ○ Size of air inlet and outlet of the plate. ○...
  • Page 24 below the drain outlet of the unit. In addition, select VP-30 or bigger size for main drain pipe. possible to connect the pipes as shown in the drawing below. Standard hard polyvinyl chloride pipe Descending slope greater VP-30 or bigger Connecting port of bottom Joint than 1/100...
  • Page 25 (2) Installation of outdoor unit RWC012A044A Notabilia as a unit d INSTALLATION MANUAL FOR OUTDOOR UNIT SRC20·25·35·50 Model • Do not use any refrigeran DXC06·09·12·18 A cylinder containing R41 R410A REFRIGERANT USED • A unit designed for R410A The processed dimension •...
  • Page 26 This may cause fire or electric shock due to defecting contact, defecting insulation personal injury due to entrapment, burn or electric shocks. and over-current etc. 4) Caution about s CAUTION (1) If the unit is installed The bottom plate of u •...
  • Page 27 • All indoor units must be models designed exclusively for R410A. Check connectable indoor unit models in a catalog, etc. (A wrong indoor unit, if connected into the system, will impair proper system operation) 1. HAULAGE AND INSTALLATION (Take particular care in carrying in or moving the unit, and always perform such an operation with two or more persons.) When a unit is hoisted with slings for haulage, take into consideration the offset of its gravity center position.
  • Page 28 compressor failure, broken piping within the unit and abnormal noise generation. amaged ause 2. REFRIGERANT PIPING WORK g in the 1) Restrictions on unit installation and use • Check the following points in light of the indoor unit specifications and the installation site. •...
  • Page 29 demand response modes 1, Fix both liquid and gas service valves at the valve main bodies as illustrated on the right, and then fasten them, the sense of cooling operatio applying appropriate fastening torque. for DRED input and supports Service valve size (mm) Tightening torque (N·m) Tightening angle ( ) Recommended length of a tool handle (mm)
  • Page 30 • The specifications shown in • All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling Wires for connecting indoor installation instructions or th operation or personal injury from burns because their surface can reach quite a high temperature due to discharged gas flowing inside during a heating operation.
  • Page 31 Main fuse specification • SRC-ZMA-S, SRC-ZMXA-S and DXC-ZMA-S complies with the DRED (Demand Response Enabling Devices) standard AS/NZS4755.3.1 and supports demand response modes 1, 2, and 3 (DRM1, 2, and 3). Since the air-conditioner limits the electric power or energy by receiving the DRED input signal, Specification Part No.
  • Page 32 r tape enabling devices) • Switchgear or Circuit breaker capacity which is calculated from MAX. over current should be chosen along the regulations in each country. ping • 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%.

  • Page 33: Outline Of Operation Control By Microcomputer

    '15 • SR-T-185 10. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by wireless remote control Operation section Transmission section OPERATION MODE select button ON/OFF (luminous) button Each time the button is pressed, the mode changes. Press to start operation, press again to stop.
  • Page 34 TIMER light (yellow) Illum Illuminates during TIMER operation. '15 • SR-T-185 Illum Unit ON/OFF button When the wireless remote control batteries become weak, or if the wireless remote control is lost or malfunctioning, this button may be used to turn the unit on and off. Operation Push the button once to place the unit in the automatic mode.
  • Page 35 '15 • SR-T-185 (5) Selection of the annual cooling function (a) The annual cooling control is valid from factory default setting. It is possible to disable by cutting jumper wire (J172), or changing the setting of dip switch (SW2-4) on the interface kit (option) PCB if it is connected. Interface kit Jumper wire (SC-BIKN-E)
  • Page 36 Timer operation (ON timer, OFF timer) can be set up to  times a day for each weekday. (9) Silent mode As “Silent mode start” signal is received from the wireless remote control, it operates by dropping the outdoor fan tap and the compressor command speed. SRR25ZM-S SRR35ZM-S Cooling Heating Cooling Heating Outdoor fan tap...
  • Page 37 '15 • SR-T-185 Defrosting operation Starting conditions (Defrosting operation can be started only when all of the following conditions are satisfied.) After start of heating operation When it elapsed  minutes. (Accumulated compressor operation time) After end of defrosting operation When it elapsed  minutes.
  • Page 38 Detail of control in each mode (Pattern) Fuzzy operation During the fuzzy operation, the air flow and the compressor speed are controlled by calculating the difference be- tween the indoor temperature setting correction temperature and the retum air temperature. Model SRR25ZM-S SRR35ZM-S Fan speed 20-74rps 20-96rps...
  • Page 39 '15 • SR-T-185 (14) Outline of automatic operation Determination of operation mode The unit checks the indoor air temperature and the outdoor air temperature, determines the operation mode, and then be- gins in the automatic operation. Cooling 27.5 25.5 Dehumidifying Indoor air temperature (˚C) 19.5 Heating...
  • Page 40 '15 • SR-T-185 Cooling overload protective control (c) Cooling overload protective control Operating conditions: When the outdoor air temperature (TH) has become continuously for 0 seconds Operating conditions: at ºC or more, or ºC or more with the compressor running, the lower limit speed of compressor is brought up.
  • Page 41 '15 • SR-T-185 Reset conditions: When either of the following condition is satisfied (iii) ) The outdoor air temperature (TH3) is D ˚C or higher. ) The compressor command speed is 0 rps. Heating high pressure control Purpose: Prevents anomalous high pressure operation during heating. Detector: Indoor heat exchanger sensor (Th) (ii) (iii)
  • Page 42 Normal operation '15 • SR-T-185 Outdoor air temperature(°C) Reset conditions: (h) Heating low outdoor temperature protective control Protective control I 1)  Operating conditions:  2)  Detail of operation:   changed as shown in the figure below. Lower limit 45 rps Lower limit 40 rps Normal operation Outdoor air temperature(°C ) Reset conditions:...
  • Page 43 '15 • SR-T-185 Current cut Purpose: Inverter is protected from overcurrent. Detail of operation: Output current from the inverter is monitored with a shunt resistor and, if the current exceeds the (ii) setting value, the compressor is stopped immediately. Operation starts again after a delay time of  minutes.
  • Page 44 '15 • SR-T-185 (ii) Heating 1) Operating conditions: When the outdoor air temperature (TH) is ºC or lower continues for 0 seconds while the compressor command speed is other than 0 rps. 2) Detail of operation: The outdoor fan is stepped up by  speed step at each 0 seconds. (Upper limit th speed) 3) Reset conditions: When either of the following conditions is satisfied.

  • Page 45: Maintenance Data

    '09•SRK-DB-087D '15 • SR-T-185 Reference Reference 11. MAINTENANCE DATA 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT (1) Cautions (2) Items to check before troubleshooting source (3) Troubleshooting procedure (If the air-conditioner does not run at all) satisfied Important source wireless proced-...
  • Page 46 '09•SRK-DB-087D '15 • SR-T-185 (4) Troubleshooting procedure (If the air-conditioner runs) 47-53. 47-53.

  • Page 47: Self-Diagnosis Table

    '15 • SR-T-185 (5) Self-diagnosis table Wired Indoor unit display panel Description remote Cause Display (flashing) condition control TIMER of trouble display light light When a heat exchanger sensor 1 wire disconnection is detected • Broken heat exchanger sensor 1-time 1 wire, poor connector while operation is stopped.

  • Page 48: 6) Service Mode (Trouble Mode Access Function

    '09•SRK-DB-087D '15 • SR-T-185 (6) Service mode (Trouble mode access function) (a) Explanation of terms Explanation Term The service mode is the mode where service data are displayed by flashing of the display lights Service mode when the operations in item (b) below are performed with the indoor control. These are the contents of error displays and protective stops which occurred in the past in the air- conditioner system.
  • Page 49 '09•SRK-DB-087D '15 • SR-T-185 4-time flash 2-time flash. wireless mode mode Self-diagnosis data wireless mode mode Wireless remote control setting Contents of output data Operation mode Fan speed mode wireless Indicates the number of Wireless remote control setting occasions previous to the present Temperature setting the error display data are from.
  • Page 50 '09•SRK-DB-087D '15 • SR-T-185 (Example) Wireless remote control setting Operation Displayed data Fan speed Temperature mode mode setting Displays the reason for the stop (error code) the previous time an error was displayed. 21ºC Displays the reason for the stop (error code) 2 times previous when an error was displayed. 22ºC Cooling 23ºC...
  • Page 51 '09•SRK-DB-087D '15 • SR-T-185 (c) Error code, stop code table Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light Error coad light (10's digit) (1's digit) Normal Can not receive signals for 35 Power source is faulty.
  • Page 52 '09•SRK-DB-087D '15 • SR-T-185 4-time flash 2-time flash. (d) Operation mode, Fan speed mode information tables (ii) mode mode Display pattern when Display pattern when Fan speed in service mode in service mode Operation mode mode when when there is an there is an RUN light TIMER light...
  • Page 53 '09•SRK-DB-087D '15 • SR-T-185 (e) Temperatare information Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor temperature Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal Sensor name...
  • Page 54 '09•SRK-DB-087D '15 • SR-T-185 (ii) Discharge pipe sensor temperature Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal -64ºC data 0.1 sec.
  • Page 55 '09•SRK-DB-087D '15 • SR-T-185 Service data record form Wireless r Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless...

  • Page 56: 7) Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '15 • SR-T-185 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Sensor temperature characteristics (Room Discharge pipe sensor temperature characteristics temp., indoor heat exchanger temp., out- door heat exchanger temp., outdoor air temp.) - 10 Temperature (˚C)
  • Page 57 '09•SRK-DB-087D '15 • SR-T-185 Current cut Compressor lock, Compressor wiring short circuit, Compressor output is open phase, Outdoor PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty. ＊   ＊ 1.703Ω (U-V, V-W, U-W) or more at 20ºC Current safe stop Overload operation, compressor lock, overcharge...
  • Page 58 '09•SRK-DB-087D '15 • SR-T-185 Over heat of compressor Gas shortage, defective discharge pipe sensor Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB ② ③ ② ③ ① ②...

  • Page 59: 8) Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '15 • SR-T-185 Rotor lock Defective compressor, defective outdoor PCB See page 56. Service valve (gas side) closed, Service valve (gas side) closed operation (8) Phenomenon observed after shortcircuit, wire breakage on sensor Defective outdoor PCB (a) Indoor unit Phenomenon Operation Sensor mode...

  • Page 60: 8) Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '15 • SR-T-185 (8) Phenomenon observed after shortcircuit, wire breakage on sensor (a) Indoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Room temperature sensor Heating '09•SRK-DB-087D Freezing cycle system protection trips and stops the compressor. Cooling Heat exchanger sensor '09•SRK-DB-087D Heating...
  • Page 61 Replace indoor PCB. blocks ② and ③ oscillating between DC 0 and 20V? '15 • SR-T-185 Indoor electrical components are normal. (b) Indoor unit fan motor check procedure 1) Indoor PCB output check ① ④ ⑤ DC several V (–) DC 308-336V (4-6 V) Measuring...

  • Page 62: Inspection Procedure For Blown Fuse On The Indoor And Outdoor Pcb

    Operation SW ON Measure in this section '15 • SR-T-185 (10) How to make sure of wireless remote control wireless wireless wireless wireless wireless wireless   Simplified check method of wireless remote control It is normal if the signal transmission section of the wireless remote control emits a whitish light at each transmission on the monitor of digital camera.

  • Page 63: Outdoor Unit Inspection Points

    （RD） （BK） （WH） （OR） （Y） （WH） （OR） （BR） （BL） （RD） （Y／G） （RD） （WH） 250V 15A （BK） （BK）...
  • Page 64 '09•SRK-DB-087D '15 • SR-T-185 (a) Inspection of electronic expansion valve (ii) (iii) (iv) • Inspection of electronic expansion valve as a separate unit Measuring point Resistance when normal (b) Outdoor unit fan motor check procedure          source ② Measuring Voltage range when point normal ⑥ ...

  • Page 65: Option Parts

    '15 • SR-T-185 12. OPTION PARTS PJA012D730 Installation manual for wired remote controller (1) Wired remote control Connect the remote control co (a) Model RC-E5 terminal block. Connect the terminal of remo Read together with indoor unit's installation manual. with the terminal of indoor uni (X and Y are no polarity) WARNING Wiring route is as shown in th...
  • Page 66 '15 • SR-T-185 mote controller Connect the remote control cord to the Sheath Sheath The range of temperature setting Upper Upper terminal block. When shipped, the range of set tempera Connect the terminal of remote control (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30°C (55 ~ 86°F)
  • Page 67 '15 • SR-T-185 PJA0 12 D73 0 Sheath eath The range of temperature setting Upper When shipped, the range of set temperature differs depending on the operation mode as below. er case Upper case Board Heating : 16 - 30°C (55 - 86°F) Except heating (cooling, fan, dry, automatic) : 18 - 30°C (62 - 86°F) Upper limit and lower limit of set temperature can be changed with remote control.
  • Page 68 '15 • SR-T-185 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote control and indoor unit are connected. As long as they are used in a typical manner, there wiil be no need to change the initial settings. If you would like to change the initial setting marked “...
  • Page 69 '15 • SR-T-185 Note 1: The initial setting marked “ ” is decided by connected indoor and outdoor unit, and is automatically defined as following table. Item Function No. Default Model "Auto-RUN" mode selectable indoor unit. Remote control function02 Indoor unit without "Auto-RUN" mode Indoor unit with two or three step of air flow setting Remote control function06...
  • Page 70 '15 • SR-T-185 PJA012D730 utomatically defined as following table. Operation message How to set function e indoor unit. Function description: Function No. Stop air-conditioner and press (SET) (MODE) setting description: N" mode buttons at the same time for over three seconds, and the step of air flow setting "FUNCTION SET "...
  • Page 71 '15 • SR-T-185 (b) Model RC-EX1A PJZ012D077 eco touch REMOTE CONTROL RC-EX1A INSTALLATION MANUAL...
  • Page 72 '15 • SR-T-185 1 . Safety precautions This installation manual describes the installation methods and precautions related to the remote control. Use this manual together with the user’s manuals for the indoor unit, outdoor unit and other option equipment. Please read this manual carefully before starting the installation work to install the unit properly.
  • Page 73 '15 • SR-T-185 When installing the unit at a hospital, telecommunication facility, etc., take measures to suppress electric noises. It could cause malfunction or break-down due to hazardous effects on the inverter, private power generator, high frequency medical equipment, radio communication equipment, etc. The influences transmitted from the remote control to medical or communication equipment could disrupt medical activities, video broadcasting or cause noise interference.
  • Page 74 '15 • SR-T-185 2 . Accessories & prepare on site R/C main unit, wood screw (ø3.5 x 16) 2 pcs Accessories User’s Manual, Installation Manual Parts procured at site When the cable length is longer than Item name Q’ty Remark 100 m, the max size for wires used Switch box in the R/C case is 0.5 mm...
  • Page 75 '15 • SR-T-185 Request Be sure not to install R/C at a place where temperatures around the installation surface of R/C may differ largely from actual room temperature. Difference between detected temperature and actual room temperature could cause troubles. The correction for detected temperature by the R/C cannot offset such temperature difference because it corrects the detected temperatures itself.
  • Page 76 '15 • SR-T-185 ④   W hen wires are passed through the bottom case, fix the bottom case at 2 places on the switch box. Upper side Upper side Switch box Switch box for 1 pc for 2 pcs Cut out the thin wall part at the screw mounting Bottom case...
  • Page 77 '15 • SR-T-185 If the hole is cut too large, moisture, dust or insects may enter. Seal gaps with putty or the like. ④     Fix the bottom R/C case on a flat surface with wood screws. ⑤   I n case of the upper center, p a s s t h e w i r i n g b e h i n d 120mm...
  • Page 78 '15 • SR-T-185 Note: Connection to personal computer It can be set from a personal computer via the USB port (mini-B). Connect after removing the cover for USB port of upper case. Replace the cover after use. If dust, insect, etc. enters, it could cause electric shocks or breakdown.

  • Page 79: Interface Kit (Sc-Bikn-E)

    '15 • SR-T-185 (2) Interface kit (SC-BIKN-E) RKZ012A088B Accessories included in package Safety precautions Before use, please read these Safety Precautions thoroughly before installation. Be sure to check all the accessories included in package. ●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.
  • Page 80 '15 • SR-T-185 Installation of the interface ・Install the interface within the range of the connection cable length from the indoor unit. (approximately 1.8m) Wiring inlet ・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.
  • Page 81 '15 • SR-T-185 Functions of CNT connector 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. 0.75mm Note (1) 0.3mm ×2m...
  • Page 82 '15 • SR-T-185 Connection of wired remote control Regarding the connection of wired remote control, refer to the instruction manual of wired remote control. ①Switch ON the DIP switch SW2-2 (Factory setting : ON) on the interface PCB. DIP suitch Caution:Wireless remote control attached to the indoor unit can be used in parallel, after connecting the wired remote control.

  • Page 83: Superlink E Board (Sc-Adna-E)

    '15 • SR-T-185 (3) Superlink E board (SC-ADNA-E) PJZ012D029CF WARING CAUTION...
  • Page 84 '15 • SR-T-185...

  • Page 85: Bottom Air Inlet Kit

    '15 • SR-T-185 (4) Bottom air inlet kit This manual contains installation points for BOTTOM AIR INLET KIT manufactured by MHI. Carry out the work following the instructions below. Keep this manual properly with USER'S MANUAL provided with the indoor unit. CAUTION ●...

  • Page 86: Remote Sensor Kit (Sc-Thb-E3)

    '15 • SR-T-185 (5) Remote sensor kit (SC-THB-E3) Sensor for return air temperature detection is located in the air inlet of the indoor unit. Use the remote sensor kit SC-THB-E3, and install it on the suitable wall so the temperature of the room can be accurately detected.
  • Page 87 '15 • SR-T-185 (f) Cut wiring from 1 & 2 pins of CNG connector. (wiring length : about 100 mm from the connector) If the pre-installed return air temperature sensor ASSY is not removed, the end of the sensor wiring should prevent a short circuit by insulating tape etc.

  • Page 88: Technical Information

    Rated air flow(outdoor) 1770 m3/h Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 7 Roundwood Avenue, Stockley Park, Uxbridge, Middlesex, UB11 1AX , United Kingdom RWA000Z263...

  • Page 89: Sr-T-

    Rated air flow(outdoor) 1950 m3/h Contact details for obtaining Name and address of the manufacturer or of its authorised representative. more information Mitsubishi Heavy Industries Air-Conditioning Europe, Ltd. 7 Roundwood Avenue, Stockley Park, Uxbridge, Middlesex, UB11 1AX , United Kingdom RWA000Z263...
  • Page 90 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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