Mitsubishi Heavy Industries SRC20ZSX-SA Technical Manual
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Mitsubishi Heavy Industries SRC20ZSX-SA Technical Manual

Mitsubishi Heavy Industries SRC20ZSX-SA Technical Manual

Inverter wall mounted type residential air-conditioners
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TECHNICAL MANUAL
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK20ZSX-S / SRC20ZSX-SA
SRK25ZSX-S / SRC25ZSX-SA
SRK35ZSX-S / SRC35ZSX-SA
Manual No.'17•SRK-T-204
updated May 22, 2018

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Summary of Contents for Mitsubishi Heavy Industries SRC20ZSX-SA

  • Page 1 Manual No.'17•SRK-T-204 updated May 22, 2018 TECHNICAL MANUAL INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) SRK20ZSX-S / SRC20ZSX-SA SRK25ZSX-S / SRC25ZSX-SA SRK35ZSX-S / SRC35ZSX-SA...

  • Page 2: Table Of Contents

    '10 • SRK-T-105 '17 • SRK-T-204 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor units ..................(2) Outdoor units ..................(3) Remote control ..................8 3. ELECTRICAL WIRING ................10 (1) Indoor units ..................10 (2) Outdoor units ..................
  • Page 3 '13 • SRK-T-135 '17 • SRK-T-204 ..............37 (21) Protective control function ................. 44 (22) Defrost heater control 10. MAINTENANCE DATA ................45 (1) Cautions ..................... 45 (2) Items to check before troubleshooting ..........45 ..45 (3) Troubleshooting procedure (If the air-conditioner does not run at all) .....

  • Page 4: Specifications

    '17 • SRK-T-204 1. SPECIFICATIONS SRK20ZSX-S Model Item Indoor unit SRK20ZSX-S Outdoor unit SRC20ZSX-SA Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.0 ( 0.9(Min.) - 3.2 (Max.)) Nominal heating capacity (range) 2.7 ( 0.8(Min.) - 5.3 (Max.)) Heating capacity (H2) —...
  • Page 5 '17 • SRK-T-204 SRK25ZSX-S Model Item Indoor unit SRK25ZSX-S Outdoor unit SRC25ZSX-SA Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 2.5 ( 0.9(Min.) - 3.7 (Max.)) Nominal heating capacity (range) 3.2 ( 0.8(Min.) - 5.8 (Max.)) Heating capacity (H2) —...
  • Page 6 '17 • SRK-T-204 SRK35ZSX-S Model Item Indoor unit SRK35ZSX-S Outdoor unit SRC35ZSX-SA Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 3.5 ( 0.9(Min.) - 4.3 (Max.)) Nominal heating capacity (range) 4.3 ( 0.8(Min.) - 6.6 (Max.)) Heating capacity (H2) —...

  • Page 7: Exterior Dimensions

    '17 • SRK-T-204 2. EXTERIOR DIMENSIONS (1) Indoor units Models SRK20ZSX-S, 25ZSX-S, 35ZSX-S RLF000Z201...

  • Page 8: Outdoor Units

    '17 • SRK-T-204 (2) Outdoor units Models SRC20ZSX-SA, 25ZSX-SA, 35ZSX-SA RCT000Z021...

  • Page 9: Remote Control

    '17 • SRK-T-204 (3) Remote control (3) Remote control (a) Wireless remote control Unit : mm...
  • Page 10 '17 • SRK-T-204 (b) Wired remote control (option parts) Interface kit (SC-BIKN-E) is required to use the wired remote control. 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. Exposed mounting In case of pulling out In case of pulling out...

  • Page 11: Electrical Wiring

    '17 • SRK-T-204 3. ELECTRICAL WIRING (1) Indoor units Models SRK20ZSX-S, 25ZSX-S, 35ZSX-S RWA000Z412...

  • Page 12: Outdoor Units

    '17 • SRK-T-204 (2) Outdoor units Models SRC20ZSX-SA, 25ZSX-SA, 35ZSX-SA RWC000Z299...

  • Page 13: Noise Level

    1000 2000 4000 8000 Mid octave band frequency (Hz) (Outdoor Unit) Mike position: at highest noise level in position as mentioned below Model SRC20ZSX-SA Distance from front side 1m Cooling 43 dB(A) Noise Level Heating 44 dB(A) × ..Cooling,...
  • Page 14 '17 • SRK-T-204 Model SRK25ZSX-S Condition ISO5151 T1/H1 (Indoor Unit) Mike position Model SRK25ZSX-S Cooling 39 dB(A) Noise 0.8m Level Heating 40 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N 70 N 60 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N 50 N 40...
  • Page 15 '17 • SRK-T-204 Model SRK35ZSX-S Condition ISO5151 T1/H1 (Indoor Unit) Mike position Model SRK35ZSX-S Cooling 43 dB(A) Noise 0.8m Level Heating 41 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N 70 N 60 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N 50 N 40...

  • Page 16: Piping System

    '17 • SRK-T-204 5. PIPING SYSTEM Models SRK20ZSX-S, 25ZSX-S, 35ZSX-S Cooling cycle Heating cycle Indoor unit Outdoor unit Outdoor air Flare temp. sensor connection Service valve (TH2) (Gas) Gas pipe Muffler Discharge pipe Heat Check joint (φ9.52) temp. sensor Room temp. exchanger sensor (TH3)

  • Page 17: Range Of Usage & Limitations

    '17 • SRK-T-204 6. RANGE OF USAGE & LIMITATIONS RANGE OF USAGE & LIMITATIONS Models SRK20, 25, 35ZSX-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 18: Correction Of Cooling And Heating Capacity In Relation To One Way Length Of Refrigerant Piping

    '09•SRK-DB-087D '17 • SRK-T-204 (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 19: Capacity Tables

    '17 • SRK-T-204 7. CAPACITY TABLES Model SRK20ZSX-S Cooling Mode (kW) Heating Mode (HC) (kW) Indoor air temp indoor air temp outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow Outdoor air temp. Air flow air temp. 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB...

  • Page 20: Application Data

    '17 • SRK-T-204 8. APPLICATION DATA RLF012A200 (1) Installation of indoor unit Model SRK20,25,35ZSX-S R410A REFRIGERANT USED • This installation manual deals with an indoor unit installation only. For an outdoor unit installation, refer to page 23. SAFETY PRECAUTIONS • Before installation, read the “SAFETY PRECAUTIONS” carefully and strictly follow it during the installa- • B e sure to confirm no operation problem on the equipment after completing the installation. If unusual tion work in order to protect yourself.

  • Page 21: Selecting Installation Location

    '17 • SRK-T-204 2. SELECTING INSTALLATION LOCATION After getting customer’s approval, select installation location according to following guidelines. 6.5 cm minimum from the ceiling (In the case of less than 10 cm, Installation example 1. Indoor unit there is a possibility of performance 2 cm degradation.) •...

  • Page 22: Drainage Work

    '17 • SRK-T-204 6. FORMING PIPING AND DRAIN HOSE 1. Forming piping Piping is possible in the right, rear, downward, left, left rear or left downward direction. Pipings Forming of pipings Taping of the exterior NOTE • Hold the bottom of the •...
  • Page 23 '17 • SRK-T-204 10. HOW TO OPEN, CLOSE, REMOVE AND INSTALL 13. INSTALLING TWO AIR-CONDITIONERS IN THE SAME ROOM THE AIR INLET PANEL 1. Open In case two air-conditioners are installed in the same room, apply this setting so that one unit can be Air inlet panel operated with only one wirelesss remote control.

  • Page 24: Installation Of Outdoor Unit

    '17 • SRK-T-204 (2) Installation of outdoor unit RWC012A060 A Model SRC20,25,35ZSX-SA R410A REFRIGERANT USED • This installation manual deals with an outdoor unit installation only. For an indoor unit installation, refer to page 19. SAFETY PRECAUTIONS • Before installation, read the “SAFETY PRECAUTIONS” carefully and strictly follow it during the installa- • B e sure to confirm no operation problem on the equipment after completing the installation. If unusual tion work in order to protect yourself.

  • Page 25: Outdoor Unit Installation

    '17 • SRK-T-204 2. OUTDOOR UNIT INSTALLATION 1. Haulage 3. Installation space • Always carry or move the unit with two or more persons. • There must be 1 meter or larger space between the unit and the wall in at least 1 of the 4 sides. •...
  • Page 26 '17 • SRK-T-204 4. CONNECTING PIPING WORK 1. Restrictions on unit installation 4. Evacuation Abide by the following restrictions on unit installation. (1) Connect vacuum pump to gauge manifold. Connect charge hose of gauge manifold to service port of outdoor unit. Improper installation can cause compressor failure or performance degradation.

  • Page 27: Finishing Work

    '17 • SRK-T-204 6. PUMP DOWN (1) Connect charge hose of gauge manifold to service port of outdoor unit. Gauge manifold (2) Close the liquid service valve with hexagonal wrench key. (3) Fully open the gas service valve with hexagonal wrench key. (4) Carry out forced cooling operation (For forced cooling operation procedure, refer to indoor unit installation manual).

  • Page 28: Outline Of Operation Control By Microcomputer

    '17 • SRK-T-204 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by wireless remote control Transmission section OPERATION MODE select button ON/OFF (luminous) button Each time the button is pressed, the Press to start operation, press again mode changes.

  • Page 29: Unit On/Off Button

    '09•SRK-DB-087D '17 • SRK-T-204 '09•SRK-DB-087D (2) Unit ON/OFF button (2) Unit ON/OFF button wireless wireless (a) Operation (a) Operation (b) Details of operation room (b) Details of operation whether to go into the COOL, DRY or HEAT modes. Function Room temperature Fan speed Flap/Louver Timer switch setting Operation mode...

  • Page 30: Selection Of The Annual Cooling Function

    '17 • SRK-T-204 Jumpre wire (J1) (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 (J3), 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 31: Eco Operation

    '17 • SRK-T-204 (8) Eco operation Pressing the HI POWER/ECONOMY button initiate a soft operation with the power suppressed in order to avoid an excessive cooling (a) Pressing the HI/ECO button initiates a soft operation with the power suppressed in order to avoid an excessive cooling or heating. (b) The remote control displays.

  • Page 32: Auto Operation

    Wireless remote   Angle of flap from horizontal control display Wireless remote '17 • SRK-T-204 COOL, DRY, FAN Approx. 15° Approx. 20° Approx. 25° Approx. 30° Approx. 55° control display HEAT Approx. 30° Approx. 40° Approx. 45° Approx. 50° Approx. 55° COOL, DRY, FAN Approx.

  • Page 33: Timer Operation

    AUTO Air flow selection Air flow selection < = Operation mode Operation mode Room temp. – Setting temp. >5°C Room temp. – Setting temp. 5°C Cooling AUTO AUTO HIGH POWER AUTO < = < = Room temp. – Setting temp. >5°C Room temp.

  • Page 34: Silent Operation

    '09•SRK-DB-087D '09•SRK-DB-087D '17 • SRK-T-204 (11) Timer operation (a) Comfort start-up (ON timer operation) (11) Timer operation (12) Silent operation The unit starts the operation 5 to 60 minutes earlier so that the room can approach optimum temperature at ON timer. When the silent operation is set, the unit operates by dropping the outdoor fan speed and the compressor speed.

  • Page 35: Display Brightness Adjustment

    '17 • SRK-T-204 (15) Display brightness adjustment This function can be used when it is necessary to adjust the brightness of unit display. Brightness level Timer light Run light 100% 100% '09•SRK-DB-087D Note(1) When the unit displays self diagnosis or service mode, brightness level is always LV2. (16) AUTO OFF operation In order to prevent the air-conditioner from continuing to operate although the person(s) has already left the room, the air-conditioner automatically stops approximalely 1 hour (or 2 hours) after the sensor judges that there is no one in the room.

  • Page 36: Reset Condition

    *It can be set the indoor fan motor off or the heating thermostat OFF with connecting a wired remote control. 12-42rps 12-50rps 12-66rps In the case, indoor air temperature is detected by sensor on the wired remote control. (b) Details of control at each operation mode (pattern) '17 •...

  • Page 37: Outline Of Cooling Operation

    (ii) Contents of control Unit : °C Signal of wireless remote control (Display) '17 • SRK-T-204 Before setting After setting (iii) Reset condition '09•SRK-DB-087D Push ON/OFF button 30 seconds or more during setting this mode. At completion of the reset, the indoor (d) Countermeasure for excessive temperature rise unit emits a buzzer sound “Pip Pip Pip”.

  • Page 38: Outline Of Automatic Operation

    12-50rps 12-58rps 12-74rps 12-34rps 12-38rps 12-54rps 12-30rps 12-34rps 12-42rps '17 • SRK-T-204 12-30rps 12-30rps 12-30rps 12-34rps 12-38rps 12-54rps (20) Outline of automatic operation (a) Determination of operation mode (a) Determination of operation mode Operation mode is determined by indoor air temperature and outdoor air temperature as following. Cooling Cooling Indoor air...
  • Page 39 '17 • SRK-T-204 When this control has continued for more than 30 minutes continuously,the following wind direction control is performed. '09•SRK-DB-087D '09•SRK-DB-087D a) When the vertical wind direction is set at other than the vertical swing,the flaps change to the horizontal position. b) When the horizontal wind direction is set at other than the horizontal swing,the louver changes to the vertical position.
  • Page 40 (iii) Reset conditions '17 • SRK-T-204 37°C. Cooling high pressure control Purpose Prevents anomalous high pressure operation during cooling. (ii) Detector Outdoor heat exchanger sensor (TH1). (iii) Detail of operation (Example) Compressor speed 8rps After lapse of 30 sec. or over 8rps After lapse of 30 sec.
  • Page 41 (iii) Reset conditions When either of the following condition is satisfied. '17 • SRK-T-204 The outdoor air temperature (TH2) is D°C or higher. The compressor speed is 0 rps. (f ) Heating high pressure control Purpose Heating high pressure control (ii) Detector Purpose:...

  • Page 42: Reset Conditions

    rps. fan speed is '17 • SRK-T-204 Reset conditions The outdoor air temperature (TH2) is lower than 11°C. • Model SRK50 (h) Heating low outdoor temperature protective control Operating conditions When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while the compressor speed other than 0 rps. Operating conditions When the outdoor air temperature (TH2) is lower than 4℃...
  • Page 43 SRK50 24 rps 24 rps has elapsed '17 • SRK-T-204 Current safe Purpose (ii) Detail of operation (k) Current cut Purpose (ii) Detail of operation Outdoor unit failure air-conditioning. item (i), (ii) is satisfied. Once the unit is stopped by this function, it is not (ii) (m) Indoor fan motor protection '09•SRK-DB-087D...
  • Page 44 Outdoor fan '17 • SRK-T-204 Outdoor air temperature > 10˚C Outdoor air temperature < = 10˚C Lower limit fan speed Outdoor fan Outdoor temperature > 16˚C Outdoor temperature < = 16˚C 21°C -38°C Reset conditions Reset conditions: (ii) Heating Operating conditions -2°C (ii) Heating...

  • Page 45: Defrost Heater Control

    '17 • SRK-T-204 (22) Defrost heater control Starting conditions When all of the following conditions (i) – (iv) have been met for 1 minute continuously, with the compressor frequency at 0 rps or higher: (i) Operation is in the heating mode. (ii) Outdoor heat exchanger sensor(TH1) temperature is lower than - 2.0°C.

  • Page 46: Maintenance Data

    '09•SRK-DB-087D '17 • SRK-T-204 Reference Reference 10. 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 198 - 264V source wireless proced-...
  • Page 47 '09•SRK-DB-087D '17 • SRK-T-204 (4) Troubleshooting procedure (If the air-conditioner runs) service 48 - 54. service 48 - 54.

  • Page 48: Self-Diagnosis Table

    '09•SRK-DB-087D '17 • SRK-T-204 (5) Self-diagnosis table air-conditioner air-conditioner air-conditioner Wired Indoor unit display panel remote Description Cause Display (flashing) condition control TIMER of trouble display light light • Broken heat exchanger sensor When a heat exchanger sensor 1 wire disconnection is detected while 1-time operation is stopped.

  • Page 49: Service Mode

    '09•SRK-DB-087D '17 • SRK-T-204 (6) Service mode (Trouble mode access function) air-conditioner (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 50 '09•SRK-DB-087D '17 • SRK-T-204 4-time flash 2-time flash. wireless mode mode air-conditioner Self-diagnosis data What are 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 51: Displayed Data

    '09•SRK-DB-087D '17 • SRK-T-204 (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 52 '09•SRK-DB-087D '17 • SRK-T-204 (c) Error code, stop code table Number of flashes when in service mode Stop coad Error Auto Error content Cause Occurrence conditions TIMER display recovery light light Error coad (10's digit) (1's digit) Normal The wired remote control wire Y is open. The wired remote control wires X and Y are reversely connected.
  • Page 53 '09•SRK-DB-087D '17 • SRK-T-204 service mode 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 54: Buzzer Sound

    '09•SRK-DB-087D '17 • SRK-T-204 (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 55 '09•SRK-DB-087D '17 • SRK-T-204 (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 56 '09•SRK-DB-087D '17 • SRK-T-204 Service data record form Wireless r Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless (Refer to page...

  • Page 57: Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '17 • SRK-T-204 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Discharge pipe sensor temperature characteristics Sensor temperature characteristics (Room temp., indoor heat exchanger temp., out- door heat exchanger temp., outdoor air temp.) - 10 Temperature (˚C)

  • Page 58: Current Cut

    '09•SRK-DB-087D '17 • SRK-T-204 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. ＊   ＊ SRC20-35:1.786Ω (U-V, V-W, U-W ) or more at 20ºC Current safe stop Overload operation, compressor lock, overcharge...
  • Page 59 '09•SRK-DB-087D '17 • SRK-T-204 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 60: Outdoor Fan Motor Error

    '09•SRK-DB-087D '17 • SRK-T-204 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB source source source source ◆  (1)      operation   Notes (1) (2) Check coil wire resistance, see page 57. wire ．...

  • Page 61: Rotor Lock

    '17 • SRK-T-204 Rotor lock Defective compressor, defective outdoor PCB See page 57. Service valve (gas side) closed operation Service valve (gas side) closed, (8) Phenomenon observed after shortcircuit, wire breakage on sensor Defective outdoor PCB (a) Indoor unit Phenomenon Operation Sensor mode...

  • Page 62: Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '17 • SRK-T-204 (8) Phenomenon observed after shortcircuit, wire breakage on sensor (a) Indoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Room temperature sensor Heating Cooling Freezing cycle system protection trips and stops the compressor. Heat exchanger sensor Heating Cooling Humidity sensor...

  • Page 63: Indoor Pcb

    blocks ② and ③ oscillating between Replace indoor PCB. DC 0 and 20V? '17 • SRK-T-204 Indoor electrical components are normal. (b) Indoor unit fan motor check procedure 1) Indoor PCB output check ① ④ ⑤ (–) DC several V DC308-336V (4-6 V) Measuring...

  • Page 64: How To Make Sure Of Wireless Remote Control

    Operation SW ON Measure in this section '17 • SRK-T-204 (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 65: Outdoor Unit Inspection Points

    '17 • SRK-T-204 (12) Outdoor unit inspection points Models SRC20ZSX-SA, 25ZSX-SA, 35ZSX-SA ◆Check point of outdoor unit CAUTION- HIGH VOLTAGE ◆Power source and serial signal inspection High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the : AC220/230/240V unit is stopped.
  • Page 66 '09•SRK-DB-087D '17 • SRK-T-204 (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 67: Indoor Unit Disassembly Procedure

    '17 • SRK-T-204 11. INDOOR UNIT DISASSEMBLY PROCEDURE...
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  • Page 73: Option Parts

    '17 • SRK-T-204 12. OPTION PARTS Installation manual for wired remote controller PJA012D730 Connect the remote control co (1) Wired remote control (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 74 '17 • SRK-T-204 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 temperat Connect the terminal of remote control (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30°C (55 ~ 86°F)
  • Page 75 '17 • SRK-T-204 P JA 012 D 73 0 Sheath Sheath The range of temperature setting Upper When shipped, the range of set temperature differs depending on the operation mode as below. per 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 76 '17 • SRK-T-204 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 77 '17 • SRK-T-204 Note 1: The initial setting marked “ ” is decided by connected indoor and outdoor unit, and is automatically defined as following table. Function No. Item 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 78 '17 • SRK-T-204 P JA 01 2D7 30 nd is automatically defined as following table. Operation message How to set function ectable indoor unit. Function description: Function No. Stop air-conditioner and press (SET) (MODE) setting description: uto-RUN" mode buttons at the same time for over three seconds, and the three step of air flow setting "FUNCTION SET "...

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

    '17 • SRK-T-204 (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 '17 • SRK-T-204 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 '17 • SRK-T-204 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. Note (1) 0.3mm ×2m 0.75mm...
  • Page 82 '17 • SRK-T-204 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)

    '17 • SRK-T-204 (3) Superlink E board (SC-ADNA-E) CAUTION WARING...
  • Page 84 '17 • SRK-T-204...

  • Page 85: Technical Information

    Rated air flow(outdoor) 1860 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 RWA000Z269...
  • Page 86 Rated air flow(outdoor) 1860 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 RWA000Z269...
  • Page 87 Rated air flow(outdoor) 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 RWA000Z269...
  • Page 88 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 16-5 Konan 2-chome, Minato-ku, Tokyo, 108-8215, Japan http://www.mhi-mth.co.jp/en/ 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.

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