Mitsubishi Heavy Industries SRK25ZMP-SJ Technical Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Heavy Industries Manuals
  4. Air Conditioner
  5. SRK25ZMP-SJ
  6. Technical manual
Mitsubishi Heavy Industries SRK25ZMP-SJ Technical Manual

Mitsubishi Heavy Industries SRK25ZMP-SJ Technical Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

TECHNICAL MANUAL
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK25ZMP-SJ
SRK35ZMP-SJ
Manual No.'13•SRK-T-152

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SRK25ZMP-SJ and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Mitsubishi Heavy Industries SRK25ZMP-SJ

Summary of Contents for Mitsubishi Heavy Industries SRK25ZMP-SJ

  • Page 1 Manual No.'13•SRK-T-152 TECHNICAL MANUAL INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) SRK25ZMP-SJ SRK35ZMP-SJ...

  • Page 2: Table Of Contents

    '10 • SRK-T-099 '13 • SRK-T-152 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor units ..................(2) Outdoor units ..................(3) Wireless remote control ..............3. ELECTRICAL WIRING ................(1) Indoor units ..................(2) Outdoor units ..................4. NOISE LEVEL ....................
  • Page 3 '10 • SRK-T-099 '13 • SRK-T-152 (7) Inspection procedures corresponding to detail of trouble ....48 (8) Phenomenon observed after shortcircuit, wire breakage on sensor ..52 (9) Checking the indoor electrical equipment ........... 53 (10) How to make sure of wireless remote control ........

  • Page 4: Specifications

    '13 • SRK-T-152 1. SPECIFICATIONS Model SRK25ZMP-SJ SRK25ZMP-SJ Model Item Indoor unit SRK25ZMP-SJ Outdoor unit SRC25ZMP-SJ Power source Single 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-152 Model SRK35ZMP-SJ SRK35ZMP-SJ Model Item Indoor unit SRK35ZMP-SJ Outdoor unit SRC35ZMP-SJ Power source Single 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: Exterior Dimensions

    '13 • SRK-T-152 2. EXTERIOR DIMENSIONS (1) Indoor units Models SRK25ZMP-SJ, 35ZMP-SJ...

  • Page 7: Outdoor Units

    '13 • SRK-T-152 (2) Outdoor units Models SRC25ZMP-SJ, 35ZMP-SJ...

  • Page 8: Wireless Remote Control

    '13 • SRK-T-152 (3) Wireless remote control Unit: mm 17.3...

  • Page 9: Electrical Wiring

    '13 • SRK-T-152 3. ELECTRICAL WIRING (1) Indoor units Models SRK25ZMP-SJ, 35ZMP-SJ t゜ t゜...

  • Page 10: Outdoor Units

    '13 • SRK-T-152 (2) Outdoor units Models SRC25ZMP-SJ, 35ZMP-SJ t゜ t゜ t゜...

  • Page 11: Noise Level

    '13 • SRK-T-152 4. NOISE LEVEL Condition ISO-T1,JIS C 9612 Model SRK25ZMP-SJ Mike position ● (Indoor Unit) 0.8m Model SRK25ZMP-SJ 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 12 '13 • SRK-T-152 Model SRK35ZMP-SJ Condition ISO-T1,JIS C 9612 Mike position ● (Indoor Unit) Model SRK35ZMP-SJ 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 13: Piping System

    '09•SRK-DB-087D '13 • SRK-T-152 5 PIPING SYSTEM 5. PIPING SYSTEM Models SRK20ZJ-S, 25ZJ-S Models SRK25ZMP-SJ, 35ZMP-SJ pipe Accumulator Humidity sensor Case of SRK35ZMP-SJ Case of SRK25ZMP-SJ...

  • Page 14: Range Of Usage & Limitations

    '13 • SRK-T-152 6. RANGE OF USAGE & LIMITATIONS SRK25ZMP-SJ, 35ZMP-SJ 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 15 '13 • SRK-T-152 (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 16: Capacity Tables

    '13 • SRK-T-152 7. CAPACITY TABLES Model SRK25ZMP-SJ (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 17: Application Data

    '13 • SRK-T-152...
  • Page 18 '13 • SRK-T-152...
  • Page 19 '13 • SRK-T-152...
  • Page 20 '13 • SRK-T-152...
  • Page 21 '13 • SRK-T-152...
  • Page 22 '13 • SRK-T-152...
  • Page 23 '13 • SRK-T-152...
  • Page 24 '13 • SRK-T-152...

  • Page 25: Outline Of Operation Control By Microcomputer

    '13 • SRK-T-152 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 26: 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 27: High Power Operation

    '13 • SRK-T-152 (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 28: 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-SJ SRK35ZMP-SJ Fan speed AUTO...
  • Page 29 SRK20ZJ-S SRK25ZJ-S SRK35ZJ-S SRK50ZJ-S (9) Outline of heating operation Fan speed 30~115rps 30~115rps 30~115rps 23~106rps Auto (a) Operation of major functional components in heating mode 30~115rps 30~115rps 30~115rps 23~106rps '13 • SRK-T-152 30~66rps 30~72rps 30~76rps 23~78rps Heating 30~40rps 30~42rps 30~46rps 23~50rps Thermostat ON Thermostat OFF...

  • Page 30: Outline Of Cooling Operation

    (i) 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-SJ SRK35ZMP-SJ Fan speed AUTO 20~74rps...

  • Page 31: Protection Control Function

    '13 • SRK-T-152 (12) Protection control function (a) 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 1) Compressor's command speed is 32 rps or higher. 2) Detected value of humidity is 68% or higher.
  • Page 32 '13 • SRK-T-152 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 with the compressor running, the lower limit speed of compressor is brought up.
  • Page 33 '13 • SRK-T-152 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 ) Outdoor air temperature (˚C) First time After the second times (iii) Reset conditions: Heating high pressure control...
  • Page 34 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 35 '13 • SRK-T-152 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 36 '13 • SRK-T-152 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 37: Outline Of Dry (Dehumidifying) Operation

    Detail of operation: Reset conditions: '13 • SRK-T-152 (r) Refrigeration cycle system protection (i) 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 minutes: Indoor air temperature (Th1)/ Operation mode...

  • Page 38: Maintenance Data

    '13 • SRK-T-152 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 39: Troubleshooting Procedure (If The Air Conditioner Runs)

    '13 • SRK-T-152 (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 40: Self-Diagnosis Table

    '13 • SRK-T-152 (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 41: Service Mode (Trouble Mode Access Function)

    '13 • SRK-T-152 (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 42 '13 • SRK-T-152 *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 43 '13 • SRK-T-152 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 44 '09•SRK-DB-087D '13 • SRK-T-152 (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 45 '13 • SRK-T-152 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 46 '13 • SRK-T-152 (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 47 '13 • SRK-T-152 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 48 '13 • SRK-T-152 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 49 '09•SRK-DB-087D '13 • SRK-T-152 (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 50 '09•SRK-DB-087D '13 • SRK-T-152 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 Current safe stop Overload operation, compressor lock, overcharge...
  • Page 51 '09•SRK-DB-087D '13 • SRK-T-152 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 52 '09•SRK-DB-087D '13 • SRK-T-152 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB ◆  (1)        Notes (1) resistance and coil wire resistance of Check coil wire resistance, see page 49. ．...
  • Page 53 '13 • SRK-T-152 Rotor lock Defective compressor, defective Rotor lock Defective compressor, defective outdoor PCB outdoor PCB See page 49. See page 49. (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 54 Cooling Heat exchanger sensor Defrosting is performed for 10 minutes at approx. 35 (model SRK35:45) minutes. Heating Cooling Ourdoor air '13 • SRK-T-152 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 55 '09•SRK-DB-087D '13 • SRK-T-152 (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 56 '13 • SRK-T-152 (11) Outdoor unit inspection points Models SRK25ZMP-SJ, 35ZMP-SJ...
  • Page 57 '13 • SRK-T-152 (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 58 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.

This manual is also suitable for:

Srk35zmp-sjSrc25zmp-sj

Table of Contents