Mitsubishi Heavy Industries SRK60ZSX-S Technical Manual
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Mitsubishi Heavy Industries SRK60ZSX-S Technical Manual

Inverter wall mounted type residential air-conditioners, split system, air to air heat pump type
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TECHNICAL MANUAL
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK20ZSX-S
25ZSX-S
35ZSX-S
50ZSX-S
60ZSX-S
Manual No.'17•SRK-T-203
updated April 10, 2017

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Summary of Contents for Mitsubishi Heavy Industries SRK60ZSX-S

  • Page 1 Manual No.'17•SRK-T-203 updated April 10, 2017 TECHNICAL MANUAL INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) SRK20ZSX-S 25ZSX-S 35ZSX-S 50ZSX-S 60ZSX-S...

  • Page 2: Table Of Contents

    '10 • SRK-T-105 '17 • SRK-T-203 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor units ..................(2) Outdoor units ..................(3) Remote control ..................11 3. ELECTRICAL WIRING ................13 (1) Indoor units ..................13 (2) Outdoor units ..................
  • Page 3 '13 • SRK-T-135 '17 • SRK-T-203 10. MAINTENANCE DATA ................51 (1) Cautions ..................... 51 (2) Items to check before troubleshooting ..........51 ..51 (3) Troubleshooting procedure (If the air-conditioner does not run at all) ..... 52 (4) Troubleshooting procedure (If the air-conditioner runs) (5) Self-diagnosis table ................

  • Page 4: Specifications

    '17 • SRK-T-203 1. SPECIFICATIONS SRK20ZSX-S Model Item Indoor unit SRK20ZSX-S Outdoor unit SRC20ZSX-S 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-203 SRK25ZSX-S Model Item Indoor unit SRK25ZSX-S Outdoor unit SRC25ZSX-S 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-203 SRK35ZSX-S Model Item Indoor unit SRK35ZSX-S Outdoor unit SRC35ZSX-S 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 '17 • SRK-T-203 SRK50ZSX-S Model Item Indoor unit SRK50ZSX-S Outdoor unit SRC50ZSX-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 5.0 ( 1.0(Min.) - 5.8 (Max.)) Nominal heating capacity (range) 6.0 ( 0.6(Min.) - 8.1 (Max.)) Heating capacity (H2) —...
  • Page 8 '17 • SRK-T-203 SRK60ZSX-S Model Item Indoor unit SRK60ZSX-S Outdoor unit SRC60ZSX-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz Nominal cooling capacity (range) 6.1 ( 1.0(Min.) - 6.8 (Max.)) Nominal heating capacity (range) 6.8 ( 0.6(Min.) - 8.7 (Max.)) Heating capacity (H2) —...

  • Page 9: Exterior Dimensions

    '17 • SRK-T-203 2. EXTERIOR DIMENSIONS (1) Indoor units Models SRK20ZSX-S, 25ZSX-S, 35ZSX-S, 50ZSX-S, 60ZSX-S RLF000Z201...

  • Page 10: Outdoor Units

    '17 • SRK-T-203 (2) Outdoor units Models SRC20ZSX-S, 25ZSX-S, 35ZSX-S RCT000Z019...
  • Page 11 '17 • SRK-T-203 Model SRC50ZSX-S, 60ZSX-S RCT000Z020...

  • Page 12: Remote Control

    '17 • SRK-T-203 (3) Remote control (3) Remote control Wireless remote control Unit : mm...
  • Page 13 '17 • SRK-T-203 (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 14: Electrical Wiring

    '17 • SRK-T-203 3. ELECTRICAL WIRING (1) Indoor units Models SRK20ZSX-S, 25ZSX-S, 35ZSX-S, 50ZSX-S, 60ZSX-S RWA000Z412...

  • Page 15: Outdoor Units

    '17 • SRK-T-203 (2) Outdoor units Models SRC20ZSX-S, 25ZSX-S, 35ZSX-S RWC000Z297...
  • Page 16 '17 • SRK-T-203 Models SRC50ZSX-S, 60ZSX-S RWC000Z298...

  • Page 17: Noise Level

    '17 • SRK-T-203 4. NOISE LEVEL Model SRK20ZSX-S Condition ISO5151 T1/H1 (Indoor Unit) Mike position Model SRK20ZSX-S Noise Cooling 38 dB(A) 0.8m Unit Level Heating 38 dB(A) 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 N5 0...
  • Page 18 '17 • SRK-T-203 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 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N5 0 N4 0...
  • Page 19 '17 • SRK-T-203 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 N5 0 N4 0...
  • Page 20 '17 • SRK-T-203 Model SRK50ZSX-S Condition ISO5151 T1/H1 (Indoor Unit) Mike position Model SRK50ZSX-S Cooling 44 dB(A) Noise 0.8m Level Heating 46 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N7 0 N6 0 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N5 0 N4 0...
  • Page 21 '17 • SRK-T-203 Model SRK60ZSX-S Condition ISO5151 T1/H1 (Indoor Unit) Mike position Model SRK60ZSX-S Cooling 46 dB(A) Noise 0.8m Level Heating 46 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N7 0 N6 0 Mike position: at highest noise level in position as mentioned below...

  • Page 22: Piping System

    '17 • SRK-T-203 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) Muffler Gas pipe Muffler Discharge pipe Heat Check joint (φ9.52) temp. sensor Room temp.

  • Page 23: Range Of Usage & Limitations

    '17 • SRK-T-203 6. RANGE OF USAGE & LIMITATIONS RANGE OF USAGE & LIMITATIONS Models SRK50, 60ZSX-S 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 24 '09•SRK-DB-087D '17 • SRK-T-203 (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 25: Capacity Tables

    '17 • SRK-T-203 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 26 4.04 3.87 3.60 4.14 3.58 4.57 3.89 4.76 3.89 4.88 3.86 5.21 4.09 5.45 4.02 Model SRK60ZSX-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.

  • Page 27: Application Data

    '17 • SRK-T-203 8. APPLICATION DATA RLF012A200 (1) Installation of indoor unit Model SRK20,25,35,50,60ZSX-S R410A REFRIGERANT USED • This installation manual deals with an indoor unit installation only. For an outdoor unit installation, refer to page 30. 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 28 '17 • SRK-T-203 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 29 '17 • SRK-T-203 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 30 '17 • SRK-T-203 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 31: Installation Of Outdoor Unit

    '17 • SRK-T-203 (2) Installation of outdoor unit RWC012A060 A Model SRC20,25,35,40,50,60ZSX-S 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 26. 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 32 '17 • SRK-T-203 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 33 '17 • SRK-T-203 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 34 '17 • SRK-T-203 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 35: Outline Of Operation Control By Microcomputer

    '17 • SRK-T-203 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 36: Unit On/Off Button

    '09•SRK-DB-087D '17 • SRK-T-203 '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 37: Selection Of The Annual Cooling Function

    '17 • SRK-T-203 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 38: Economy Operation

    '17 • SRK-T-203 (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 39: Auto Operation

    Wireless remote Angle of flap from horizontal control display Wireless remote '17 • SRK-T-203 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° Approx.

  • Page 40: 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 41: Silent Operation

    The unit starts the operation 5 to 60 minutes earlier so that the room can approach optimum temperature at ON timer. SRK20ZSX-S SRK25ZSX-S SRK35ZSX-S SRK50ZSX-S SRK60ZSX-S (b) Sleep timer operation Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Outdoor fan speed...

  • Page 42: Display Brightness Adjustment

    In the case, indoor air temperature is detected by sensor on the wired remote control. (b) Details of control at each operation mode (pattern) (i) Fuzzy operation Model SRK20ZSX-S SRK25ZSX-S SRK35ZSX-S SRK50ZSX-S SRK60ZSX-S Fan speed 12-78rps 12-86rps 12-98rps 12-106rps 12-120rps Auto...
  • Page 43 During the heating operation, the indoor fan speed can be controlled based on the temperature of the indoor heat exchanger (Th2) to prevent blowing out of cold air. (c) Defrost operation Model are satisfied.) SRK20ZSX-S SRK25ZSX-S SRK35ZSX-S SRK50ZSX-S SRK60ZSX-S Fan speed 12-78rps 12-86rps 12-98rps 12-106rps 12-120rps Auto 12-78rps...

  • Page 44: Outline Of Cooling Operation

    Indoor fan Outdoor fan (few minutes ON) (few minutes ON) 4-way valve (b) Detail of control in each mode (Pattern) Fuzzy operation Model SRK20ZSX-S SRK25ZSX-S SRK35ZSX-S SRK50ZSX-S SRK60ZSX-S Fan speed 12-50rps 12-58rps 12-74rps 12-86rps 12-110rps Auto 12-50rps 12-58rps 12-74rps 12-86rps...

  • Page 45: Outline Of Automatic Operation

    12-50rps 12-58rps 12-74rps 12-86rps 12-110rps 12-34rps 12-38rps 12-54rps 12-70rps 12-90rps 12-30rps 12-34rps 12-42rps 12-50rps 12-66rps '17 • SRK-T-203 12-30rps 12-30rps 12-30rps 12-30rps 12-30rps 12-34rps 12-38rps 12-54rps 12-70rps 12-90rps (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.
  • Page 46 '17 • SRK-T-203 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 47: Operating Conditions

    (iii) Reset conditions '17 • SRK-T-203 37°C (models SRK50, 60 : 40°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 48 (iii) Reset conditions When either of the following condition is satisfied. '17 • SRK-T-203 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 49 rps. fan speed is 3rd (models SRK50, 60 : 2nd) '17 • SRK-T-203 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 50 SRK50 24 rps 24 rps has elapsed '17 • SRK-T-203 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 51 Outdoor fan '17 • SRK-T-203 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 (models SRK50, 60 : 4°C) (ii) Heating...

  • Page 52: Maintenance Data

    '09•SRK-DB-087D '17 • SRK-T-203 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 53 '09•SRK-DB-087D '17 • SRK-T-203 (4) Troubleshooting procedure (If the air-conditioner runs) service 54 - 60. service 54 - 60.

  • Page 54: Self-Diagnosis Table

    '09•SRK-DB-087D '17 • SRK-T-203 (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 55: 6) Service Mode (Trouble Mode Access Function

    '09•SRK-DB-087D '17 • SRK-T-203 (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 56 '09•SRK-DB-087D '17 • SRK-T-203 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 57 '09•SRK-DB-087D '17 • SRK-T-203 (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 58 '09•SRK-DB-087D '17 • SRK-T-203 (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 59 '09•SRK-DB-087D '17 • SRK-T-203 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 60 '09•SRK-DB-087D '17 • SRK-T-203 (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 61 '09•SRK-DB-087D '17 • SRK-T-203 (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 62 '09•SRK-DB-087D '17 • SRK-T-203 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 63: 7) Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '17 • SRK-T-203 (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 64 '09•SRK-DB-087D '17 • SRK-T-203 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 SRC50, 60:0.864Ω...
  • Page 65 '09•SRK-DB-087D '17 • SRK-T-203 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 66 '09•SRK-DB-087D '17 • SRK-T-203 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 ◆     operation   Notes (1) (2) Check coil wire resistance, see page 63. wire ．...

  • Page 67: 8) Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '17 • SRK-T-203 Rotor lock Defective compressor, defective outdoor PCB See page 63. 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 68: 8) Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '17 • SRK-T-203 (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 69 blocks ② and ③ oscillating between Replace indoor PCB. DC 0 and 20V? '17 • SRK-T-203 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 70: Inspection Procedure For Blown Fuse On The Indoor And Outdoor Pcb

    Operation SW ON Measure in this section '17 • SRK-T-203 (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 71: Outdoor Unit Inspection Points

    '17 • SRK-T-203 (12) Outdoor unit inspection points Models SRC20ZSX-S, 25ZSX-S, 35ZSX-S ◆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 72 '17 • SRK-T-203 Models SRC50ZSX-S, 60ZSX-S ◆Check point of outdoor unit CAUTION - HIGH VOLTAGE High voltage is produced in the control box. Don't touch ◆Power source and serial signal inspection electrical parts in the control box for 5 minutes after the : AC220/230/240V unit is stopped.
  • Page 73 '09•SRK-DB-087D '17 • SRK-T-203 (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...

  • Page 74: Indoor Unit Disassembly Procedure

    '17 • SRK-T-203 11. INDOOR UNIT DISASSEMBLY PROCEDURE...
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  • Page 80: Option Parts

    '17 • SRK-T-203 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 81 '17 • SRK-T-203 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 82 '17 • SRK-T-203 P JA 01 2 D 7 3 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 83 '17 • SRK-T-203 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 84 '17 • SRK-T-203 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 85 '17 • SRK-T-203 PJA01 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 86: Interface Kit (Sc-Bikn-E)

    '17 • SRK-T-203 (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 87 '17 • SRK-T-203 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 88 '17 • SRK-T-203 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 89 '17 • SRK-T-203 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 90: Superlink E Board (Sc-Adna-E)

    '17 • SRK-T-203 (3) Superlink E board (SC-ADNA-E) CAUTION WARING...
  • Page 91 '17 • SRK-T-203...

  • Page 92: 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 93: Srk-T

    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 94 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 95 Rated air flow(outdoor) 2340 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 96 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 97 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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