Mitsubishi Heavy Industries SRK20ZMXA-S Technical Manual & Parts List
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Mitsubishi Heavy Industries SRK20ZMXA-S Technical Manual & Parts List

Wall mounted type residential air-conditioners
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Manual No.'14 • SRK-T-155
RESIDENTIAL AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST
WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK20ZMXA-S
SRK25ZMXA-S
SRK35ZMXA-S
SRK50ZMXA-S
SRK60ZMXA-S

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  • Page 1 Manual No.'14 • SRK-T-155 RESIDENTIAL AIR-CONDITIONING TECHNICAL MANUAL & PARTS LIST WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) SRK20ZMXA-S SRK25ZMXA-S SRK35ZMXA-S SRK50ZMXA-S SRK60ZMXA-S...
  • Page 3 '14 • SRK-T-155 TECHNICAL MANUAL...

  • Page 4: Table Of Contents

    '10 • SRK-T-105 '14 • SRK-T-155 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor units ..................(2) Outdoor units ..................10 (3) Remote control ..................12 3. ELECTRICAL WIRING ................14 (1) Indoor units ..................14 (2) Outdoor units ..................
  • Page 5 '14 • SRK-T-155 10. MAINTENANCE DATA ................65 (1) Cautions ..................... 65 (2) Items to check before troubleshooting ..........65 (3) Troubleshooting procedure (If the air conditioner does not run at all) ..65 ..... 66 (4) Troubleshooting procedure (If the air conditioner runs) (5) Self-diagnosis table ................

  • Page 6: Specifications

    '14 • SRK-T-155 1. SPECIFICATIONS SRK20ZMXA-S Model Indoor unit SRK20ZMXA-S Outdoor unit SRC20ZMXA-S Item Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.0 ( 0.9 (Min.) - 3.1 (Max.)) Nominal heating capacity (range) 2.5 ( 0.9 (Min.) - 4.3 (Max.)) Cooling 0.35 ( 0.19 - 0.70 )
  • Page 7 '14 • SRK-T-155 SRK25ZMXA-S Model Item Indoor unit SRK25ZMXA-S Outdoor unit SRC25ZMXA-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.55 ( 0.9 (Min.) - 3.2 (Max.)) Nominal heating capacity (range) 3.13 ( 0.9 (Min.) - 4.7 (Max.)) Cooling 0.49 ( 0.19 - 0.82 ) Power...
  • Page 8 '14 • SRK-T-155 SRK35ZMXA-S Model Indoor unit SRK35ZMXA-S Outdoor unit SRC35ZMXA-S Item Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 3.5 ( 0.9 (Min.) - 4.1 (Max.)) Nominal heating capacity (range) 4.3 ( 0.9 (Min.) - 5.1 (Max.)) Cooling 0.845 ( 0.19 - 1.01 ) Power...
  • Page 9 '14 • SRK-T-155 SRK50ZMXA-S Model Item Indoor unit SRK50ZMXA-S Outdoor unit SRC50ZMXA-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 5.0 ( 1.1 (Min.) - 5.8 (Max.)) Nominal heating capacity (range) 6.0 ( 0.6 (Min.) - 7.7 (Max.)) Cooling 1.30 ( 0.2 - 1.80 ) Power...
  • Page 10 '14 • SRK-T-155 SRK60ZMXA-S Model Indoor unit SRK60ZMXA-S Outdoor unit SRC60ZMXA-S Item Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 6.0 ( 1.1 (Min.) - 6.8 (Max.)) Nominal heating capacity (range) 6.8 ( 0.6 (Min.) - 8.2 (Max.)) Cooling 1.86 ( 0.2 - 2.50 ) Power...

  • Page 11: Exterior Dimensions

    '14 • SRK-T-155 2. EXTERIOR DIMENSIONS (1) Indoor units Models SRK20ZMXA-S, 25ZMXA-S, 35ZMXA-S, 50ZMXA-S, 60ZMXA-S RKY000Z056...

  • Page 12: Outdoor Units

    '14 • SRK-T-155 (2) Outdoor units Models SRC20ZMXA-S, 25ZMXA-S, 35ZMXA-S RCV000Z018...
  • Page 13 '14 • SRK-T-155 Models SRC50ZMXA-S, 60ZMXA-S RCT000Z008...

  • Page 14: Remote Control

    '14 • SRK-T-155 (3) Remote control (a) Wireless remote control Unit : mm...
  • Page 15 '14 • SRK-T-155 (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 16: Electrical Wiring

    '14 • SRK-T-155 3. ELECTRICAL WIRING (1) Indoor units Models SRK20ZMXA-S, 25ZMXA-S, 35ZMXA-S, 50ZMXA-S, 60ZMXA-S RWA000Z256...

  • Page 17: Outdoor Units

    '14 • SRK-T-155 (2) Outdoor units Models SRC20ZMXA-S, 25ZMXA-S, 35ZMXA-S RWC000Z271...
  • Page 18 '14 • SRK-T-155 Models SRC50ZMXA-S, 60ZMXA-S RWC000Z268...

  • Page 19: Noise Level

    '14 • SRK-T-155 4. NOISE LEVEL Model SRK20ZMXA-S Condition ISO-T1,JIS C 9612 (Indoor Unit) Mike position Model SRK20ZMXA-S Noise Cooling 39 dB(A) 0.8m Unit Level Heating 38 dB(A) Mike position (Center & Low points) × ..Cooling, Heating N 7 0...
  • Page 20 '14 • SRK-T-155 Model SRK25ZMXA-S Condition ISO-T1,JIS C 9612 (Indoor Unit) Mike position Model SRK25ZMXA-S Cooling 41 dB(A) Noise 0.8m Level Heating 41 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N 7 0 N 6 0 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N 5 0...
  • Page 21 '14 • SRK-T-155 Model SRK35ZMXA-S Condition ISO-T1,JIS C 9612 (Indoor Unit) Mike position Model SRK35ZMXA-S Cooling 43 dB(A) Noise 0.8m Level Heating 42 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N 7 0 N 6 0 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N 5 0...
  • Page 22 '14 • SRK-T-155 Model SRK50ZMXA-S Condition ISO-T1, JIS C 9612 (Indoor Unit) Mike position Model SRK50ZMXA-S Cooling 47 dB(A) Noise 0.8m Level Heating 48 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N 7 0 N 6 0 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N 5 0...
  • Page 23 '14 • SRK-T-155 Model SRK60ZMXA-S Condition ISO-T1, JIS C 9612 (Indoor Unit) Mike position Model SRK60ZMXA-S Cooling 51 dB(A) Noise 0.8m Level Heating 48 dB(A) Unit Mike position (Center & Low points) × ..Cooling, Heating N 7 0 N 6 0 Mike position: at highest noise level in position as mentioned below Distance from front side 1m N 5 0...

  • Page 24: Piping System

    '14 • SRK-T-155 Models SRK20ZJX-S, 25ZJX-S, 35ZJX-S 5. PIPING SYSTEM Models SRK20ZMXA-S, 25ZMXA-S, 35ZMXA-S Cooling cycle Heating cycle Indoor unit Outdoor unit Outdoor air Flare temp. sensor connection Service valve (TH2) (Gas) Discharge pipe temp. sensor Gas pipe Check joint...

  • Page 25: Range Of Usage & Limitations

    '14 • SRK-T-155 6. RANGE OF USAGE & LIMITATIONS RANGE OF USAGE & LIMITATIONS Models SRK50,60ZMXA-S SRK20,25,35ZMXA-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 26 '09•SRK-DB-087D '14 • SRK-T-155 (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 27: Capacity Tables

    '14 • SRK-T-155 7. CAPACITY TABLES Model SRK20ZMXA-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...
  • Page 28 '14 • SRK-T-155 Model SRK50ZMXA-S Cooling Mode (kW) Heating Mode (HC) (kW) Indoor air temperature Indoor air temperature Outdoor Outdoor air temp. 18˚CDB 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow ˚CDB air temp. Air flow 12˚CWB 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB...

  • Page 29: Application Data

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  • Page 33: Installation Of Outdoor Unit

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  • Page 49: Outline Of Operation Control By Microcomputer

    '14 • SRK-T-155 9. 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 50: Unit On/Off Button

    '14 • SRK-T-155 (2) 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. Push it once more to turn the unit off. Details of operation The unit will go into the automatic mode in which it automatically determines, from indoor temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes.

  • Page 51: Selection Of The Annual Cooling Function

    '14 • SRK-T-155 (5) Selection of the annual cooling function (a) The annual cooling function can be enabled or disabled by means of the jumper wire (J172) on the indoor unit PCB and the dip switch (SW2-4) on the interface kit (option) PCB. Interface kit Jumper wire (SC-BIKN-E)

  • Page 52: Flap And Louver Control

    '14 • SRK-T-155 (8) Flap and louver control   Control the flap and louver by AIRFLOW (UP/DOWN) and (LEFT/RIGHT) button on the wireless remote control.   Flap   Each time when you press the AIRFLOW (UP/DOWN) button the mode changes as follows. (Flap stopped) (Swing) Angle of Flap from Horizontal...

  • Page 53: Auto Operation

    '14 • SRK-T-155 (9) 3D auto operation Control the flap and louver by 3D AUTO button on the wireless remote control. Air flow selection and air flow direction are automatically controlled, allowing the entire indoor to efficiently conditioned. During Cooling and Heating (Including auto cooling and heating) Air flow selection is determined according to indoor temperature and setting temperature.

  • Page 54: Timer Operation

    The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period. (11) 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. SRK20ZMXA-S SRK25ZMXA-S SRK35ZMXA-S SRK50ZMXA-S...

  • Page 55: Outline Of Heating Operation

    Fuzzy operation Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed. Model SRK20ZMXA-S SRK25ZMXA-S SRK35ZMXA-S SRK50ZMXA-S...

  • Page 56: Outline Of Cooling Operation

    '14 • SRK-T-155 The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature ¡ The outdoor air temperature ≧ 0ºC (model SRK50, 60 : ≧ － 2ºC) : 7ºC or higher ¡ － 15ºC ≦ The outdoor air temperature ＜ 0ºC (model SRK50, 60 : ＜ － 2ºC) : 4/15 × The outdoor air tem- perature + 7ºC or higher ¡...

  • Page 57: Outline Of Dry (Dehumidifying) Opration

    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 between the indoor temperature setting correction temperature and the return air temperature. Model SRK20ZMXA-S SRK25ZMXA-S SRK35ZMXA-S SRK50ZMXA-S SRK60ZMXA-S...

  • Page 58: Protective Control Function

    '14 • SRK-T-155 The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previous operation mode, changes the operation mode. When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
  • Page 59 '14 • SRK-T-155 Frost prevention control (During cooling or dehumidifying) Operating conditions Indoor heat exchanger temperature (Th2) is lower than 5ºC. compressor command 5 minutes after reaching the compressor command speed except 0 rps. speed (ii) Detail of anti-frost operation Lower Indoor heat exchanger temperature limit...
  • Page 60 '14 • SRK-T-155 Cooling high pressure control Purpose: Prevents anomalous high pressure operation during cooling. (ii) Detector: Outdoor heat exchanger sensor (TH1) (iii) Detail of operation: Model SRK20~35 Model SRK50, 60 TH2 > = 32ºC Outdoor heat exchanger Outdoor heat exchanger temperature (ºC) temperature (ºC) TH2 <...
  • Page 61 '14 • SRK-T-155 Heating high pressure control Purpose: Prevents anomalous high pressure operation during heating. (ii) Detector: Indoor heat exchanger sensor (Th2) (iii) Detail of operation: (Example) Fuzzy 4rps 8rps After lapse of 20 (10) sec. or over 4rps 8rps After lapse of 20 (10) sec.
  • Page 62 calculation exceeds the upper limit, the upper limit value is maintained. The lower limit of compressor command speed is set to 40 rps and even if the calculated result becomes lower than that after fuzzy calculation, the speed is kept to 40 rps. However, when the thermo OFF, the speed is reduced to '14 •...
  • Page 63 '14 • SRK-T-155 • Models SRK50, 60 Operating conditions: When the outdoor air temperature (TH2) is lower than 4ºC or higher continues for 30 sec- onds while the compressor command speed is other than 0 rps. (ii) Detail of operation: The lower limit compressor command speed is change as shown in the figure below.
  • Page 64 '14 • SRK-T-155 (k) Current cut Purpose: Inverter is protected from overcurrent. (ii) Detail of operation: Output current from the inverter is monitored with a shunt resistor and, if the current exceeds the setting value, the compressor is stopped immediately. Operation starts again after a delay time of 3 minutes.
  • Page 65 '14 • SRK-T-155 (ii) Heating Operating conditions: When the outdoor air temperature (TH2) is 4ºC or lower continues for 30 seconds while the compressor command speed is other than 0 rps. 2) Detail of operation: The outdoor fan is stepped up by 2 speed step at each 20 seconds. (Upper limit 8th speed) 3) Reset conditions: When either of the following conditions is satisfied The outdoor air temperature (TH2) is 6ºC or higher.

  • Page 66: Dred

    '14 • SRK-T-155 (19) DRED This air conditioner complies with the DRED (Demand Response Enabling Devices) standard AS/NZS4755.3.1 and supports below 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, the feeling of cooling operation or heating operation may deteriorate during (Extra- that time.

  • Page 67: Maintenance Data

    '09•SRK-DB-087D '14 • SRK-T-155 Reference Reference 10. MAINTENANCE DATA 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 wireless proced-...

  • Page 68: Troubleshooting Procedure (If The Air Conditioner Runs)

    '09•SRK-DB-087D '14 • SRK-T-155 (4) Troubleshooting procedure (If the air conditioner runs) 68-74. 68-74.

  • Page 69: Self-Diagnosis Table

    '09•SRK-DB-087D '14 • SRK-T-155 (5) Self-diagnosis table Wired Outdoor Indoor unit display panel remote Description control PCB Cause Display (flashing) condition control TIMER of trouble Red LED display light light When a heat exchanger sensor 1 wire disconnection is detected while •...

  • Page 70: Service Mode (Trouble Mode Access Function)

    '09•SRK-DB-087D '14 • SRK-T-155 (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 71 '09•SRK-DB-087D '14 • SRK-T-155 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 72 '09•SRK-DB-087D '14 • SRK-T-155 (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 73 '09•SRK-DB-087D '14 • SRK-T-155 (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 supply is faulty.
  • Page 74 '09•SRK-DB-087D '14 • SRK-T-155 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 75 '09•SRK-DB-087D '14 • SRK-T-155 (e) Temperatare information Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor temperature. Units: °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 76 '09•SRK-DB-087D '14 • SRK-T-155 (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 77 '09•SRK-DB-087D '14 • SRK-T-155 Service data record form Wireless r Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless...

  • Page 78: Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '14 • SRK-T-155 (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 79 '09•SRK-DB-087D '14 • SRK-T-155 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 : 1.703Ω (U-V, V-W, U-W) or more at 20ºC SRC50, 60 : 0.864Ω...
  • Page 80 '09•SRK-DB-087D '14 • SRK-T-155 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 81 '09•SRK-DB-087D '14 • SRK-T-155 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB ◆       Notes (1) Check coil wire resistance, see page 77. wire ． Outdoor fan motor error Defective fan motor, connector poor connection, defective outdoor PCB...

  • Page 82: 8) Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '14 • SRK-T-155 Rotor lock Defective compressor, defective outdoor PCB See page 77. 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 83: Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '14 • SRK-T-155 (8) Phenomenon observed after shortcircuit, wire breakage on sensor (a) Indoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Room temperature sensor Heating Freezing cycle system protection trips and stops the compressor. Cooling Heat exchanger sensor Heating Cooling Humidity sensor...
  • Page 84 Replace indoor PCB. blocks ② and ③ oscillating between DC 0 and 20V? '14 • SRK-T-155 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 85: How To Make Sure Of Wireless Remote Control

    Operation SW ON Measure in this section '14 • SRK-T-155 (10) How to make sure of wireless remote control wireless wireless wireless wireless wireless wireless   Simplified check methd 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 86: Outdoor Unit Inspection Points

    '14 • SRK-T-155 (12) Outdoor unit inspection points Models SRC20ZMXA-S, 25ZMXA-S, 35ZMXA-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 : AC 220/230/240V unit is stopped.
  • Page 87 '14 • SRK-T-155 Models SRC50ZMXA-S, 60ZMXA-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 : AC 220/230/240V electrical parts in the control box for 5 minutes after the : AC 220/230/240V unit is stopped.
  • Page 88 '09•SRK-DB-087D '14 • SRK-T-155 (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          ② Measuring Voltage range when point normal...

  • Page 89: Option Parts

    '14 • SRK-T-155 11. 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 90 '14 • SRK-T-155 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 91 '14 • SRK-T-155 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 92 '14 • SRK-T-155 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 93 '14 • SRK-T-155 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 94: How To Set Function

    '14 • SRK-T-155 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 95: Interface Kit (Sc-Bikn-E)

    '14 • SRK-T-155 (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 96: Installation Of The Interface

    '14 • SRK-T-155 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 97: Functions Of Cnt Connector

    '14 • SRK-T-155 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 98: Connection Of Wired Remote Controller

    '14 • SRK-T-155 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 99: Super Link E Board (Sc-Adna-E)

    '14 • SRK-T-155 (3) Super link E board (SC-ADNA-E) WARING CAUTION...

  • Page 100: Srk-T

    '14 • SRK-T-155...

  • Page 101: Parts List

    '14 • SRK-T-155 PARTS LIST TECHNICAL MANUAL INDOOR UNIT SRK20ZMXA-S, SRK25ZMXA-S, SRK35ZMXA-S, SRK50ZMXA- SRK60ZMXA-S OUTDOOR UNIT SRC20ZMXA-S, SRC25ZMXA-S, SRC35ZMXA-S, SRC50ZMXA-S, SRC60ZMXA-S...
  • Page 102 '14 • SRK-T-155 PANEL & FAN ASSY CRAE0282...
  • Page 103 '14 • SRK-T-155 SRK20ZMXA-S END ITEM NO. : RWA002F074 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1～13 RKY 102A 001N PANEL ASSY,FRONT 1 RKY 122A 002A PANEL ASSY,FRONT 2 RKY 435A 003 GRILLE,AIR IN(TOP) 3～8 RKY 435A 004B...
  • Page 104 '14 • SRK-T-155 SRK20ZMXA-S END ITEM NO. : RWA002F074 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 40 RKY 129A 030 COVER,CONNECTOR ×...
  • Page 105 '14 • SRK-T-155 MEMO...
  • Page 106 '14 • SRK-T-155 HEAT EXCH. & CONTROL CRAE0283...

  • Page 107: Srk-T

    '14 • SRK-T-155 SRK20ZMXA-S END ITEM NO. : RWA002F074 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RKY 301A 008 HEAT EXCH ASSY(AIR) 2～4 RKY 321A 001 PIPE ASSY 7 RKY 132A 003 LID,CONTROL 8 RKY 129A 015...
  • Page 108 '14 • SRK-T-155 PANEL & FAN ASSY CRAE0282...
  • Page 109 '14 • SRK-T-155 SRK25ZMXA-S END ITEM NO. : RWA002F074A Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1～13 RKY 102A 001N PANEL ASSY,FRONT 1 RKY 122A 002A PANEL ASSY,FRONT 2 RKY 435A 003 GRILLE,AIR IN(TOP) 3～8 RKY 435A 004B PANEL ASSY,AIR IN 4 RKY 435A 007B PANEL,ORNAMENT...
  • Page 110 '14 • SRK-T-155 SRK25ZMXA-S END ITEM NO. : RWA002F074A Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 40 RKY 129A 030 COVER,CONNECTOR ×...
  • Page 111 '14 • SRK-T-155 MEMO...
  • Page 112 '14 • SRK-T-155 HEAT EXCH. & CONTROL CRAE0283...
  • Page 113 '14 • SRK-T-155 SRK25ZMXA-S END ITEM NO. : RWA002F074A Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RKY 301A 008 HEAT EXCH ASSY(AIR) 2～4 RKY 321A 001 PIPE ASSY 7 RKY 132A 003 LID,CONTROL 8 RKY 129A 015 HOLDER,SENSOR 9 RKY 129A 014 COVER,BEND...
  • Page 114 '14 • SRK-T-155 PANEL & FAN ASSY CRAE0282...
  • Page 115 '14 • SRK-T-155 SRK35ZMXA-S END ITEM NO. : RWA002F074B Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1～13 RKY 102A 001N PANEL ASSY,FRONT 1 RKY 122A 002A PANEL ASSY,FRONT 2 RKY 435A 003 GRILLE,AIR IN(TOP) 3～8 RKY 435A 004B PANEL ASSY,AIR IN 4 RKY 435A 007B PANEL,ORNAMENT...
  • Page 116 '14 • SRK-T-155 SRK35ZMXA-S END ITEM NO. : RWA002F074B Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 40 RKY 129A 030 COVER,CONNECTOR ×...
  • Page 117 '14 • SRK-T-155 MEMO...
  • Page 118 '14 • SRK-T-155 HEAT EXCH. & CONTROL CRAE0283...
  • Page 119 '14 • SRK-T-155 SRK35ZMXA-S END ITEM NO. : RWA002F074B Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RKY 301A 008 HEAT EXCH ASSY(AIR) 2～4 RKY 321A 001 PIPE ASSY 7 RKY 132A 003 LID,CONTROL 8 RKY 129A 015 HOLDER,SENSOR 9 RKY 129A 014 COVER,BEND...
  • Page 120 '14 • SRK-T-155 PANEL & FAN ASSY CRAE0282...
  • Page 121 '14 • SRK-T-155 SRK50ZMXA-S END ITEM NO. : RWA002F074C Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1～13 RKY 102A 001N PANEL ASSY,FRONT 1 RKY 122A 002A PANEL ASSY,FRONT 2 RKY 435A 003 GRILLE,AIR IN(TOP) 3～8 RKY 435A 004B PANEL ASSY,AIR IN 4 RKY 435A 007B PANEL,ORNAMENT...
  • Page 122 '14 • SRK-T-155 SRK50ZMXA-S END ITEM NO. : RWA002F074C Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 40 RKY 129A 030 COVER,CONNECTOR ×...
  • Page 123 '14 • SRK-T-155 MEMO...
  • Page 124 '14 • SRK-T-155 HEAT EXCH. & CONTROL CRAE0284...
  • Page 125 '14 • SRK-T-155 SRK50ZMXA-S END ITEM NO. : RWA002F074C Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RKY 301A 006 HEAT EXCH ASSY(AIR) 2～4 RKY 321A 001A PIPE ASSY 7 RKY 132A 003 LID,CONTROL 8 RKY 129A 015 HOLDER,SENSOR 9 RKY 129A 014 COVER,BEND...
  • Page 126 '14 • SRK-T-155 PANEL & FAN ASSY CRAE0282...
  • Page 127 '14 • SRK-T-155 SRK60ZMXA-S END ITEM NO. : RWA002F074D Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1～13 RKY 102A 001N PANEL ASSY,FRONT 1 RKY 122A 002A PANEL ASSY,FRONT 2 RKY 435A 003 GRILLE,AIR IN(TOP) 3～8 RKY 435A 004B PANEL ASSY,AIR IN 4 RKY 435A 007B PANEL,ORNAMENT...
  • Page 128 '14 • SRK-T-155 SRK60ZMXA-S END ITEM NO. : RWA002F074D Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 40 RKY 129A 030 COVER,CONNECTOR ×...
  • Page 129 '14 • SRK-T-155 MEMO...
  • Page 130 '14 • SRK-T-155 HEAT EXCH. & CONTROL CRAE0284...
  • Page 131 '14 • SRK-T-155 SRK60ZMXA-S END ITEM NO. : RWA002F074D Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RKY 301A 006 HEAT EXCH ASSY(AIR) 2～4 RKY 321A 001A PIPE ASSY 7 RKY 132A 003 LID,CONTROL 8 RKY 129A 015 HOLDER,SENSOR 9 RKY 129A 014 COVER,BEND...
  • Page 132 '14 • SRK-T-155 PANEL & FAN ASSY CRBE0276...
  • Page 133 '14 • SRK-T-155 SRC20ZMXA-S END ITEM NO. : RWC003F094AA Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCV 122A 002 PANEL,FRONT 2 RCV 123A 002 PANEL,SIDE(R) 3 RCV 124A 001 PANEL,TOP 4 RCV 132A 004 COVER ASSY,SERVICE 5 RCV 435A 001A GRILLE,AIR OUTLET 7 RCV 142A 001...
  • Page 134 '14 • SRK-T-155 HEAT EXCH. & CONTROL (GAS) (LIQ.) 32 33 30・36 30・37 CRBE0376 CONTROL ASSY...
  • Page 135 '14 • SRK-T-155 SRC20ZMXA-S END ITEM NO. : RWC003F094AA Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCV 301A 100 HEAT EXCH(AIR) 2 RCV 321A 200A PIPING ASSY(DISCH) 3 RCV 321A 202A PIPING ASSY(SUCTION) 4 SSA 382C 091 VALVE,S(4WAY) 2 20S 5～9 RCV 304A 100...
  • Page 136 '14 • SRK-T-155 PANEL & FAN ASSY CRBE0276...
  • Page 137 '14 • SRK-T-155 SRC25ZMXA-S END ITEM NO. : RWC003F094AB Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCV 122A 002 PANEL,FRONT 2 RCV 123A 002 PANEL,SIDE(R) 3 RCV 124A 001 PANEL,TOP 4 RCV 132A 004 COVER ASSY,SERVICE 5 RCV 435A 001A GRILLE,AIR OUTLET 7 RCV 142A 001...
  • Page 138 '14 • SRK-T-155 HEAT EXCH. & CONTROL (GAS) (LIQ.) 32 33 30・36 30・37 CRBE0376 CONTROL ASSY...
  • Page 139 '14 • SRK-T-155 SRC25ZMXA-S END ITEM NO. : RWC003F094AB Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCV 301A 100 HEAT EXCH(AIR) 2 RCV 321A 200A PIPING ASSY(DISCH) 3 RCV 321A 202A PIPING ASSY(SUCTION) 4 SSA 382C 091 VALVE,S(4WAY) 2 20S 5～9 RCV 304A 100...
  • Page 140 '14 • SRK-T-155 PANEL & FAN ASSY CRBE0276...
  • Page 141 '14 • SRK-T-155 SRC35ZMXA-S END ITEM NO. : RWC003F094AC Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCV 122A 002 PANEL,FRONT 2 RCV 123A 002 PANEL,SIDE(R) 3 RCV 124A 001 PANEL,TOP 4 RCV 132A 004 COVER ASSY,SERVICE 5 RCV 435A 001A GRILLE,AIR OUTLET 7 RCV 142A 001...
  • Page 142 '14 • SRK-T-155 HEAT EXCH. & CONTROL (GAS) (LIQ.) 32 33 30・36 30・37 CRBE0376 CONTROL ASSY...
  • Page 143 '14 • SRK-T-155 SRC35ZMXA-S END ITEM NO. : RWC003F094AC Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCV 301A 100 HEAT EXCH(AIR) 2 RCV 321A 200A PIPING ASSY(DISCH) 3 RCV 321A 202A PIPING ASSY(SUCTION) 4 SSA 382C 091 VALVE,S(4WAY) 2 20S 5～9 RCV 304A 100...
  • Page 144 '14 • SRK-T-155 PANEL & FAN ASSY CRBE0315...
  • Page 145 '14 • SRK-T-155 SRC50ZMXA-S END ITEM NO. : RWC003F085AB Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCT 122A 003 PANEL ASSY,FRONT 2 RCT 122A 006 PANEL,SERVICE 3 RCT 124A 002 PANEL,TOP 4 RCT 125A 002 PANEL ASSY,REAR 5 RCT 435A 001 GRILLE,AIR OUTLET 6 RCT 132A 002...
  • Page 146 '14 • SRK-T-155 HEAT EXCH. & CONTROL (LIQ.) (GAS) 40 34 CRBE0377...
  • Page 147 '14 • SRK-T-155 SRC50ZMXA-S END ITEM NO. : RWC003F085AB Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCT 301A 307 HEAT EXCH ASSY(AIR) 2～6 RCT 304A 302D PIPING ASSY(EXPAN) 2 SSA 387F 052 VALVE,BODY(EXP) 2 EEV 3 SSA 357A 005A STRAINER 4 RCT 315B 002 CAPILLARY...
  • Page 148 '14 • SRK-T-155 PANEL & FAN ASSY CRBE0315...
  • Page 149 '14 • SRK-T-155 SRC60ZMXA-S END ITEM NO. : RWC003F085AC Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCT 122A 003 PANEL ASSY,FRONT 2 RCT 122A 006 PANEL,SERVICE 3 RCT 124A 002 PANEL,TOP 4 RCT 125A 002 PANEL ASSY,REAR 5 RCT 435A 001 GRILLE,AIR OUTLET 6 RCT 132A 002...
  • Page 150 '14 • SRK-T-155 HEAT EXCH. & CONTROL (LIQ.) (GAS) 40 34 CRBE0377...
  • Page 151 '14 • SRK-T-155 SRC60ZMXA-S END ITEM NO. : RWC003F085AC Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCT 301A 307 HEAT EXCH ASSY(AIR) 2～6 RCT 304A 302D PIPING ASSY(EXPAN) 2 SSA 387F 052 VALVE,BODY(EXP) 2 EEV 3 SSA 357A 005A STRAINER 4 RCT 315B 002 CAPILLARY...
  • Page 152 RESIDENTIAL AIR-CONDITIONING TECHNICAL MANUAL & PARTS LIST Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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