Mitsubishi SRK25ZMP-S Technical Manual
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Mitsubishi SRK25ZMP-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)
SRK25ZMP-S
SRK35ZMP-S
SRK45ZMP-S
Manual No.'13•SRK-T-140

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  • Page 1 Manual No.'13•SRK-T-140 TECHNICAL MANUAL INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) SRK25ZMP-S SRK35ZMP-S SRK45ZMP-S...

  • Page 2: Table Of Contents

    '10 • SRK-T-099 '13 • SRK-T-140 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor units ..................(2) Outdoor units ..................(3) Wireless remote control ..............3. ELECTRICAL WIRING ................10 (1) Indoor units ..................10 (2) Outdoor units ..................
  • Page 3 '10 • SRK-T-099 '13 • SRK-T-140 (8) Phenomenon observed after shortcircuit, wire breakage on sensor ..55 (9) Checking the indoor electrical equipment ........... 56 (10) How to make sure of wireless remote control ........57 (11) Outdoor unit inspection points .............. 58 11.

  • Page 4: Specifications

    '13 • SRK-T-140 1. SPECIFICATIONS Model SRK25ZMP-S SRK25ZMP-S Model Item Indoor unit SRK25ZMP-S Outdoor unit SRC25ZMP-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 2.5 (0.9 (Min.) - 2.8 (Max.)) Nominal heating capacity (range) 2.8 (0.8 (Min.) - 3.9 (Max.)) Cooling 0.780 (0.25 - 1.01)
  • Page 5 '13 • SRK-T-140 Model SRK35ZMP-S SRK35ZMP-S Model Item Indoor unit SRK35ZMP-S Outdoor unit SRC35ZMP-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 3.2 (0.9 (Min.) - 3.5 (Max.)) Nominal heating capacity (range) 3.6 (0.9 (Min.) - 4.3 (Max.)) Cooling 0.995 (0.23 - 1.32) Power...
  • Page 6 '13 • SRK-T-140 Model SRK45ZMP-S SRK45ZMP-S Model Item Indoor unit SRK45ZMP-S Outdoor unit SRC45ZMP-S Power source 1 Phase, 220 - 240V, 50Hz Nominal cooling capacity (range) 4.5 (0.9 (Min.) - 4.8 (Max.)) Nominal heating capacity (range) 5.0 (0.8 (Min.) - 5.8 (Max.)) Cooling 1.495 (0.22-1.98) Power...
  • Page 7 768.1 Symbol Content Model 25,35 φ9.52(3／8")(Flare) Gas piping Model 45 φ12.7(1／2")(Flare) Liquid piping φ6.35(1／4")(Flare) Hole on wall for right rear piping ( φ65) Hole on wall for left rear piping ( φ65) Drain hose VP16 Outlet for wiring Outlet for piping（on both side） Outlet for down piping Terminal block （Refer to the above view）...

  • Page 8: Outdoor Units

    Notes Symbol Content (1) It must not be surrounded by walls on the four sides. Service valve connection(gas side) φ9.52(3／8")(Flare) (2) The unit must be fixed with anchor bolts. An anchor bolt must not protrude more than 15mm. Service valve connection(liquid side) φ6.35(1／4")(Flare) (3) Where the unit is subject to strong winds, lay it in such Pipe／cable draw-out hole...
  • Page 9 Notes Symbol Content (1) It must not be surrounded by walls on the four sides. Service valve connection(gas side) (2) The unit must be fixed with anchor bolts. An anchor bolt must not φ12.7(1／2")(Flare) protrude more than 15mm. Service valve connection(liquid side) φ6.35(1／4")(Flare) (3) Where the unit is subject to strong winds, lay it in such Pipe／cable draw-out hole...

  • Page 10: Wireless Remote Control

    '13 • SRK-T-140 (3) Wireless remote control Unit: mm 17.3...

  • Page 11: Electrical Wiring

    HEAT HEAT EXCHANGER EXCHANGER Item Description Connector BOX, CONTROL Fan motor 1 3 4 5 Flap motor Y／G Humidity sensor Room temp. sensor S／N Heat exch. sensor Diode stack Fuse Terminal block 250V 3.15A Varistor Mark Color Black Blue PWB ASSY White Yellow Y／G...

  • Page 12: Outdoor Units

    TO INDOOR UNIT POWER WIRES SIGNAL WIRE PWB ASSY T1 T2 POWER POWER SOURCE TRANSISTOR ～220-240V 50Hz t゜ 250V 15A R.IN （BK） （RD） 250V 20A NOISE （WH） FILTER 3～ （BK） S.IN （WH） F3 250V 1A （Y／G） （RD） CIRCUIT CNFAN （Y／G） 250V 10A SWITCHING POWER CIRCUIT...

  • Page 13: Indoor Units

    '13 • SRK-T-140 4. NOISE LEVEL Condition ISO-T1,JIS C 9612 Model SRK25ZMP-S Mike position ● (Indoor Unit) 0.8m Model SRK25ZMP-S Unit Mike position Noise Cooling 45 dB(A) (Center & Low points) Level Heating 43 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned belo ●...
  • Page 14 '13 • SRK-T-140 Model SRK35ZMP-S Condition ISO-T1,JIS C 9612 Mike position ● (Indoor Unit) Model SRK35ZMP-S 0.8m Unit Cooling 47 dB(A) Noise Mike position (Center & Low points) Level Heating 44 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned belo ●...
  • Page 15 '13 • SRK-T-140 Model SRK45ZMP-S Condition ISO-T1,JIS C 9612 Mike position ● (Indoor Unit) 0.8m Model SRK45ZMP-S Unit Mike position Cooling 46 dB(A) Noise (Center & Low points) Level Heating 48 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned belo ●...

  • Page 16: Piping System

    '09•SRK-DB-087D '13 • SRK-T-140 5 PIPING SYSTEM 5. PIPING SYSTEM Models SRK20ZJ-S, 25ZJ-S Models SRK25ZMP-S, 35ZMP-S Accumulator Humidity sensor Case of SRK35ZMP-S Case of SRK25ZMP-S Model SRK35ZJ-S Model SRK45ZMP-S 12.7 Accumulator Humidity sensor...

  • Page 17: Range Of Usage & Limitations

    '13 • SRK-T-140 6. RANGE OF USAGE & LIMITATIONS SRK25ZMP-S, 35ZMP-S SRK45ZMP-S Net capacity = Capacity shown on specification Correction factors as follows. (1) Coefficient of cooling and heating capacity in relation to temperatures Cooling Heating Applicable range Depends on installed situation Indoor air W.B.
  • Page 18 '13 • SRK-T-140 (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

    '13 • SRK-T-140 7. CAPACITY TABLES Model SRK25ZMP-S (kW) Heating Mode(HC) (kW) Cooling Mode Indoor air temp Outdoor Air flow Outdoor Air flow air temp. Indoor air temp ˚CDB ˚CDB ˚CDB ˚CDB ˚CDB ˚CDB ˚CDB air temp. ˚CDB 18˚CDB 20˚CDB 22˚CDB 24˚CDB ˚CWB...

  • Page 20: Application Data

    8. APPLICATION DATA RLC012A001A Models SRK25ZMP-S, 35ZMP-S, 45ZMP-S SELECTION O INSTALLATION MANUAL • When install the unit, be sure to check whether the selection of installation place, power supply specifications, usage limitation (piping length, height WALL TYPE AIR CONDITIONER (Install at location that meets the differences between indoor and outdoor units, power supply voltage and etc.)
  • Page 21 • Do not put the drainage pipe directly into drainage channels where high, which can cause burst and personal injury. • Do not vent R410A into the atmosphere : R410A is a fluorinated greenhouse The height of a wall is 1200mm o poisonous gases such as sulphide gas can occur.

  • Page 22: Selection Of Installation Location

    012A001A SELECTION OF INSTALLATION LOCATION NDITIONER (Install at location that meets the following conditions, after getting approval from the customer) ANT USED Indoor unit 6.5 cm minimum from the ceiling ○Where there is no obstructions to the air flow and where the cooled and heated air can be evenly distributed. ①...

  • Page 23: Earthing Work

    Model SRK25, DXK09 SRK35, DXK12 SRK45, DXK15 Outlet Open Open Total one way length MAX. 15m MAX. 15m MAX. 25m Vertical height difference MAX. 10m MAX. 10m MAX. 15m Less than 10m : Not required Less than 15m : Not required Additional refrigerant Not required nse the ambient...

  • Page 24: Installation Of Indoor Unit

    INSTALLATION OF INDOOR UNIT INSTALLATIO Fixing of outdoor Installation of Installation board ○Make sure that the unit is Relation between setting plate and indoor unit Fixing of installation board Fix the unit to stable base ○Adjustment of the installation board in the horizontal ○When installing the unit at Look for the inside wall structures (Intermediate support or pillar INSTALLATION SPACE (INDOOR UNIT)

  • Page 25: Air Purge

    Natural-and/or synch. rubber wire insulation dangerous as the terminal block may heat up and catch fire. Polychloroprene rubber conductors insulation 2) Take care not to confuse the terminal numbers for indoor and Stranded core CONNECTIO outdoor connections. Screw 4 or 5 Number of conductors ⑤...

  • Page 26: Installation Of The Outdoor Unit

    INSTALLATION OF THE OUTDOOR UNIT Fixing of outdoor Drain piping work CAUTION ○Make sure that the unit is stable in installation. ○Execute drain piping by using a drain elbow and drain grommets supplied or unit Fix the unit to stable base. separately as accessories, where water drained from the outdoor unit is a Please connect the problem.

  • Page 27: Test Run

    ( φ 12.7) : 49.0 ~ 61.0 N ・ m (4.9~6.1 kgf ・ m) ● Flaring work Measurement B (mm) Use a flare tool designed for R410A or a conventional flare Measurement B Copper pipe Clutch type flare tool Conventional (R22) flare tool tool.

  • Page 28: Outline Of Operation Control By Microcomputer

    '13 • SRK-T-140 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote control Remote control S Operation section FAN SPEED button OPERATION MODE select button Each time the button is pressed, the Each time the button pressed, the display is switched over in turn.

  • Page 29: Unit On/Off Button

    • Do not go near high temperature • Do not leave the remote control ex- • Do not drop the remote control. places, such as an electric carpet posed to direct sunlight or other Handle with care. or stove. strong lighting. '13 •...

  • Page 30: High Power Operation

    '13 • SRK-T-140 (5) High power operation Pressing the HI POWER/ECONO button intensifies the operating power and initiates powerful cooling and heating operation for 15 minutes continuously. The remote control displays and the FAN SPEED display disappears. (a) During the HIGH POWER operation, the room temperature is not controlled. When it causes an excessive cooling and heating, press the HI POWER/ECONO button again to cancel the HIGH POWER operation.

  • Page 31: Timer Operation

    Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in accordance with the fuzzy rule, and used for control of the air capacity and the compressor command speed. Model SRK25ZMP-S SRK35ZMP-S SRK45ZMP-S Fan speed...
  • Page 32 SRK20ZJ-S SRK25ZJ-S SRK35ZJ-S SRK50ZJ-S Fan speed (9) Outline of heating operation 30~115rps 30~115rps 30~115rps 23~106rps Auto 30~115rps 30~115rps 30~115rps 23~106rps (a) Operation of major functional components in heating mode '13 • SRK-T-140 30~66rps 30~72rps 30~76rps 23~78rps Heating 30~40rps 30~42rps 30~46rps 23~50rps Thermostat ON Thermostat OFF...

  • Page 33: Outline Of Cooling Operation

    (b) Detail of control in each mode (Pattern) Fuzzy operation During the fuzzy operation, the air flow and the compressor command speed are controlled by calculating the difference between the room temperature setting correction temperature and the suction air temperature. Model SRK25ZMP-S SRK35ZMP-S SRK45ZMP-S Fan speed AUTO...

  • Page 34: Protection Control Function

    '13 • SRK-T-140 (12) Protection control function Dew prevention control [Cooling]:Prevents dewing on the indoor unit. (i) Operating conditions:When the following conditions have been met for more than 30 minutes after starting operation Compressor's command speed is 32 rps or higher. (SRK25, 35 only) Detected value of humidity is 68% or higher.
  • Page 35 '13 • SRK-T-140 Cooling overload protective control (i) Operating conditions: When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41ºC or more, or 47ºC or more (Model SRK45: 41ºC or more) with the compressor running, the lower limit speed of compressor is brought up.
  • Page 36 speed is '13 • SRK-T-140 (3) Values in 〔 〕 are for the model SRK45. Upper limit 50 rps Lower limit 50 44 rps Upper limit 50 rps Lower limit 44 rps Upper limit 60 rps Lower limit 30 rps Outdoor air temperature.(°C ) (Models SRK25, 35) , E, F (Model SRK45)
  • Page 37 RPSmin < 40 40 < = RPSmin < 80 80 < = RPSmin < 90 53 ~ 47 57 ~ 51 59 ~ 53 Outdoor air temperature(°C) 90 < = RPSmin < 102 47 ~ 41 51 ~ 45 53 ~ 47 '13 •...
  • Page 38 '13 • SRK-T-140 Compressor overheat protection (i) Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the com- pressor overheat. (ii) Detail of operation 1) Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe. (Example) Fuzzy 4 rps After lapse of 60 seconds.
  • Page 39 '13 • SRK-T-140 Serial signal transmission error protection Purpose: (ii) Detail of operation: Rotor lock Rotor lock Outdoor fan motor protection Outdoor fan motor protection Outdoor fan control at low outdoor temperature Cooling Outdoor fan control at low outdoor temperature Operating conditions: Cooling Operating conditions:...
  • Page 40 Detail of operation: Reset conditions: '13 • SRK-T-140 (model SRK45:2 Refrigeration cycle system protection Starting conditions When 5 minutes have elapsed after the compressor ON or the completion of the defrost control Other than the defrost control When, after meeting the conditions of 1) and 2) above, the compressor speed, indoor air temperature (Th1) and indoor heat exchanger temperature (Th2) have met the conditions in the following table for 10 (SRK45:5) minutes: Indoor air temperature (Th1)/ Operation mode...

  • Page 41: Maintenance Data

    '13 • SRK-T-140 10. MAINTENANCE DATA (1) Cautions (a) If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharg- ing this electrical charge (to DC 10 V or lower).

  • Page 42: Troubleshooting Procedure (If The Air Conditioner Runs)

    '13 • SRK-T-140 (4) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. The cause of the trouble can be specifically identified. Check the self-diagnosis display. Eliminate the cause of the trouble and perform an operation check.

  • Page 43: Self-Diagnosis Table

    '13 • SRK-T-140 (5) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation.

  • Page 44: Service Mode (Trouble Mode Access Function)

    '13 • SRK-T-140 (6) Service mode (Trouble mode access function) This air conditioner is capable of recording error displays and protective stops (service data) which have occurred in the past. If self-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble occurred by checking these service data.
  • Page 45 '13 • SRK-T-140 *3: To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of flashes.) In the case of current cut (example: stop code “42”) The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
  • Page 46 '13 • SRK-T-140 ② Stop data Remote control setting Displayed data Operation Fan speed Temperature switching switching setting 21ºC Displays the reason for the stop (stop code) the previous time when the air conditioner was stopped by protective stop control. 22ºC Displays the reason for the stop (stop code) 2 times previous when the air conditioner was stopped by protective stop control.
  • Page 47 '09•SRK-DB-087D '13 • SRK-T-140 (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 48 '13 • SRK-T-140 Note (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the lights light up at first (start signal). (See the example shown below.) In the case of current cut (example: stop code “42”) The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
  • Page 49 '13 • SRK-T-140 (e) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air tempera- ture sensor temperature, outdoor heat exchanger sensor temperature table Units: ºC TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) * If no data are recorded (error code is normal), the display for each sensor becomes as shown below.
  • Page 50 '13 • SRK-T-140 Discharge pipe temperature table Units: ºC TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) * If no data is recorded (error code is normal), the display for sensor becomes as shown below. Sensor value displayed when the error code is normal Sensor name -64ºC...
  • Page 51 '13 • SRK-T-140 Service data record form Model Customer Date of investigation Machine name Content of complaint Display results Remote control settings Display content Content of displayed data Temperature setting Operation switching Fan speed switching Buzzer (Yes/No.) RUN light (Times) TIMER light (Times) Error code on previous occasion.

  • Page 52: Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '13 • SRK-T-140 (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 53 '09•SRK-DB-087D '13 • SRK-T-140 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. ＊   ＊ SRK25, 35 : 4.293Ω (U-V, V-W, U-W) or more at 20ºC SRK45 : 1.104Ω...
  • Page 54 '09•SRK-DB-087D '13 • SRK-T-140 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 55 '09•SRK-DB-087D '13 • SRK-T-140 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB ◆       Notes (1) resistance and coil wire resistance of Check coil wire resistance, see page 52. ．...
  • Page 56 '13 • SRK-T-140 Rotor lock Defective compressor, defective Rotor lock Defective compressor, defective outdoor PCB outdoor PCB See page 52. See page 52. (8) Phenomenon observed after shortcircuit, wire breakage on sensor (8) Phenomenon observed after shortcircuit, wire breakage on sensor (a) Indoor unit (a) Indoor unit Phenomenon...
  • Page 57 Cooling Heat exchanger sensor Defrosting is performed for 10 minutes at approx. 35 (model SRK35:45) minutes. Heating Cooling Ourdoor air '13 • SRK-T-140 temperature sensor Defrosting is performed for 10 minutes at approx. 35 (model SRK35:45) minutes. Heating Discharge pipe All modes sensor (9) Checking the indoor electrical equipment...
  • Page 58 '09•SRK-DB-087D '13 • SRK-T-140 (C) Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] (1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.) If no problems are found, check the output of the power transistor.
  • Page 59 ◆ Check point of outdoor unit CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. Color symbol Mark Color Black Orange ◆Inspection power transistor Remove the fasten terminal and test output voltage White Yellow...
  • Page 60 '13 • SRK-T-140 (a) Inspection of electronic expansion valve Electronic expansion valve operates for approx. 10 seconds after the power on, in order to determine its aperture. Check the operating sound and voltage during the period of time. (Voltage cannot be checked during operation in which only the aperture change occurs.) (i) If it is heard the sound of operating electronic expansion valve, it is almost normal.

  • Page 61: Technical Information

    Rated air flow(outdoor) 1560 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 RWA000Z249-7 RWA000Z249...
  • Page 62 Rated air flow(outdoor) 1524 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 RWA000Z249-8 RWA000Z249...
  • Page 63 2130 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 Drawing No. RWA000Z249-9 RWA000Z249...
  • Page 64 INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS Air-Conditioning & Refrigeration Systems 16-5, Konan 2-chome, Minato-ku, Tokyo, 108-8215 Japan http://www.mhi.co.jp 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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