Mitsubishi Heavy Industries SRK20ZSPR-S Technical Manual
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Mitsubishi Heavy Industries SRK20ZSPR-S Technical Manual

Inverter wall mounted type residential air-conditioners
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TECHNICAL MANUAL
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK20ZSPR-S
25ZSPR-S
35ZSPR-S
45ZSPR-S
63ZSPR-S
71ZSPR-S
80ZSPR-S
Manual No.'17•SRK-T-206

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Summary of Contents for Mitsubishi Heavy Industries SRK20ZSPR-S

  • Page 1 Manual No.'17•SRK-T-206 TECHNICAL MANUAL INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) SRK20ZSPR-S 25ZSPR-S 35ZSPR-S 45ZSPR-S 63ZSPR-S 71ZSPR-S 80ZSPR-S...

  • Page 2: Table Of Contents

    6. RANGE OF USAGE & LIMITATIONS ............. 38 7. CAPACITY TABLES ................... 40 .................. 43 8. APPLICATION DATA 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....63 (A) Models SRK20ZSPR-S,25ZSPR-S,35ZSPR-S,45ZSPR-S ....63 (B) Models SRK63ZSPR-S,71ZSPR-S,80ZSPR-S ........76 ................77 ................77 ........ 77 ..........78...
  • Page 3 '17 • SRK-T-206 ................78 ................78 ................. 79 ..................81 ..................81 ..................81 ................93 10. MAINTENANCE DATA ..................... 93 ..........93 ..93 ......... 97 11. OPTION PARTS ..................120 How to read the model name Example: SRK 20 Z SPR-S Series code Inverter type...

  • Page 4: Specifications

    '17 • SRK-T-206 1. SPECIFICATIONS SRK20ZSPR-S Model ZSPR-S ZSPR-S z / 220V, 60Hz n i l y t i ) ) . y t i ) ) . n i l n i l Max. 9 Operation n i l...
  • Page 5 '17 • SRK-T-206 SRK25ZSPR-S Model Item Indoor unit SRK25ZSPR-S Outdoor unit SRC25ZSPR-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz 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) Power...
  • Page 6 '17 • SRK-T-206 SRK35ZSPR-S Model Item Indoor unit SRK35ZSPR-S Outdoor unit SRC35ZSPR-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz 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 7 '17 • SRK-T-206 SRK45ZSPR-S Model Item Indoor unit SRK45ZSPR-S Outdoor unit SRC45ZSPR-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz 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 8 '17 • SRK-T-206 SRK63ZSPR-S Model 3ZSPR-S 3ZSPR-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz n i l y t i ) ) . y t i ) ) . Heating capacity (H2) n i l Power consumption Heating (H2) n i l Operation...
  • Page 9 '17 • SRK-T-206 Model SRK71ZSPR-S 1ZSPR-S 1ZSPR-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz n i l y t i ) ) . y t i ) ) . Heating capacity (H2) n i l Power consumption Heating (H2) n i l Operation...
  • Page 10 '17 • SRK-T-206 Model SRK80ZSPR-S ZSPR-S ZSPR-S Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz n i l y t i ) ) . y t i ) ) . Heating capacity (H2) n i l Power consumption Heating (H2) n i l Operation...

  • Page 11: Exterior Dimensions

    '17 • SRK-T-206 2. EXTERIOR DIMENSIONS (1) Indoor units Model SRK20ZSPR-S RLC000Z004...
  • Page 12 '17 • SRK-T-206 Models SRK25ZSPR-S, 35ZSPR-S, 45ZSPR-S RLC000Z003...
  • Page 13 '17 • SRK-T-206 Models SRK63ZSPR-S, 71ZSPR-S, 80ZSPR-S RLD000Z002...
  • Page 14 '17 • SRK-T-206 (2) Outdoor units Model SRC20ZSPR-S RCW000Z004...
  • Page 15 '17 • SRK-T-206 Models SRC25ZSPR-S, 35ZSPR-S RCW000Z002...
  • Page 16 '17 • SRK-T-206 Model SRC45ZSPR-S RCV000Z016...
  • Page 17 '17 • SRK-T-206 Model SRC63ZSPR-S RCT000Z016...
  • Page 18 '17 • SRK-T-206 Model SRC71ZSPR-S RCR000Z024...
  • Page 19 '17 • SRK-T-206 Model SRC80ZSPR-S RCR000Z025...
  • Page 20 '17 • SRK-T-206 (3) Remote control (a) Wireless remote control (for SRK20, 25, 35, 45ZSPR-S) Unit: mm 17.3...
  • Page 21 '17 • SRK-T-206 (b) Wireless remote controll (for SRK63, 71, 80ZSPR-S) Unit : mm...
  • Page 22 '17 • SRK-T-206 (c) 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 23: Electrical Wiring

    '17 • SRK-T-206 3. ELECTRICAL WIRING (1) Indoor units Model SRK20ZSPR-S t゜ t゜ RWA000Z264...
  • Page 24 '17 • SRK-T-206 Models SRK25ZSPR-S, 35ZSPR-S, 45ZSPR-S t゜ t゜ RWA000Z250...
  • Page 25 '17 • SRK-T-206 Models SRK63ZSPR-S, 71ZSPR-S, 80ZSPR-S RWA000Z406...
  • Page 26 '17 • SRK-T-206 (2) Outdoor units Model SRC20ZSPR-S t゜ t゜ t゜ RWC000Z286...
  • Page 27 '17 • SRK-T-206 Models SRC25ZSPR-S, 35ZSPR-S, 45ZSPR-S RWC000Z261...
  • Page 28 '17 • SRK-T-206 Models SRC63ZSPR-S, 71ZSPR-S, 80ZSPR-S RCR000Z030...

  • Page 29: Noise Level

    '17 • SRK-T-206 4. NOISE LEVEL Condition ISO-T1,JIS C 9612 Model SRK20ZSPR-S Mike position ● (Indoor Unit) Model SRK20ZSPR-S 0.8m Unit Cooling 45 dB(A) Noise Mike position (Center & low points) Level Heating 43 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned below ●...
  • Page 30 '17 • SRK-T-206 Model SRK25ZSPR-S Condition ISO-T1,JIS C 9612 Mike position ● (Indoor Unit) 0.8m Model SRK25ZSPR-S Unit Mike position Cooling 45 dB(A) Noise (Center & low points) Level Heating 43 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned below ●...
  • Page 31 '17 • SRK-T-206 Model SRK35ZSPR-S Condition ISO-T1,JIS C 9612 Mike position ● (Indoor Unit) Model SRK35ZSPR-S 0.8m Unit Noise Cooling 47 dB(A) Mike position (Center & low points) Level Heating 44 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned below ●...
  • Page 32 '17 • SRK-T-206 Model SRK45ZSPR-S Condition ISO-T1,JIS C 9612 Mike position ● (Indoor Unit) 0.8m Model SRK45ZSPR-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 below ●...
  • Page 33 '17 • SRK-T-206 Model SRK63ZSPR-S Condition ISO5151 T1 MODE Rated capacity value Mike position ● (Indoor Unit) Model SRK63ZSPR-S 0.8m Unit Noise Cooling 44 dB(A) Mike position (Center & low points) Level Heating 44 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned below ●...
  • Page 34 '17 • SRK-T-206 Model SRK71ZSPR-S Condition ISO5151 T1 MODE Rated capacity value Mike position ● (Indoor Unit) Model SRK71ZSPR-S 0.8m Unit Noise Cooling 44 dB(A) Mike position (Center & low points) Level Heating 46 dB(A) × ..Cooling Heating Mike position: at highest noise level in position as mentioned below ●...
  • Page 35 '17 • SRK-T-206 Model SRK80ZSPR-S Condition ISO5151 T1 MODE Rated capacity value (Indoor Unit) Mike position ● Model SRK80ZSPR-S Cooling 47 dB(A) Noise 0.8m Unit Level Heating 47 dB(A) Mike position (Center & low points) × ..Cooling Heating Mike position: at highest noise level in position as mentioned below ●...

  • Page 36: Piping System

    '09•SRK-DB-087D '17 • SRK-T-206 5 PIPING SYSTEM 5. PIPING SYSTEM Models SRK20ZJ-S, 25ZJ-S Models SRK20ZSPR-S, 25ZSPR-S pipe Accumulator Humidity sensor '09•SRK-DB-087D 5 PIPING SYSTEM Models SRK20ZJ-S, 25ZJ-S Model SRK35ZSPR-S Accumulator Humidity sensor Case of SRK25ZMP-S (5) Model SRK35ZJ-S...
  • Page 37 SRK25ZMP-S (5) '17 • SRK-T-206 Model SRK35ZJ-S Model SRK45ZSPR-S 12.7 Accumulator Humidity sensor 5. PIPING SYSTEM Model SRK63ZSPR-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 Heat...
  • Page 38 (EEV) pipe Electronic (Liquid) expansion valve ( 6.35) Capillary tube Liquid Service valve (EEV) pipe (Liquid) ( 6.35) Capillary tube Strainer Strainer Flare connection '17 • SRK-T-206 Strainer Strainer Flare connection Model SRK71ZSPR-S Cooling cycle Model SRK71ZSPR-S Heating cycle Indoor unit Outdoor unit Cooling cycle Outdoor air...

  • Page 39: Range Of Usage & Limitations

    '17 • SRK-T-206 6. RANGE OF USAGE & LIMITATIONS SRK20ZSPR-S SRK63ZSPR-S SRK45ZSPR-S SRK25ZSPR-S SRK71ZSPR-S SRK35ZSPR-S SRK80ZSPR-S Max. 15m Max. 25m Max. 30m Max. 10m (Outdoor unit is higher) Max. 15m (Outdoor unit is higher) Max. 20m (Outdoor unit is higher) Max.
  • Page 40 '17 • SRK-T-206 (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 41: Capacity Tables

    1.39 1.32 1.48 1.41 1.62 1.54 1.68 1.60 1.72 1.63 1.83 1.74 1.91 1.73 7. CAPACITY TABLES 1.34 1.27 1.43 1.36 1.57 1.50 1.64 1.56 1.68 1.60 1.79 1.70 1.87 1.72 1.32 1.25 1.41 1.34 1.55 1.48 1.62 1.54 1.66 1.58 1.77 1.68 1.85 1.71 Model SRK20ZSPR-S Cooling Mode (kW) Heating Mode(HC) (kW) Indoor air temp.
  • Page 42 2.49 2.20 2.63 2.18 2.78 2.31 2.84 2.29 2.90 2.27 3.02 2.38 3.13 2.32 3.31 3.28 3.26 3.23 3.20 10.1 2.43 2.18 2.57 2.15 2.72 2.29 2.80 2.27 2.85 2.25 2.98 2.36 3.08 2.31 3.56 3.53 3.52 3.48 3.45 2.37 2.14 2.51 2.13 2.67 2.27 2.74 2.25 2.80 2.23 2.93 2.35 3.04 2.29 /min) 2.31 2.12 2.44 2.10 2.61 2.24 2.69 2.23 2.75 2.21 2.89 2.33 3.00 2.28 2.24 2.09 2.38 2.07 2.56 2.22 2.64 2.21 2.70 2.19 2.84 2.31 2.95 2.27...
  • Page 43 '17 • SRK-T-206 Model SRK63ZSPR-S Model SRK63ZR-S ling Mode (kW) ting Mode (kW) Heating Mode (HC) Indoor air temp. Outdoor Outdoor Indoor air temp. Air flow air temp. ℃DB ℃DB ℃DB ℃DB ℃DB ℃DB ℃DB Air flow air temp. ℃WB ℃...
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  • Page 64: Outline Of Operation Control By Microcomputer

    '17 • SRK-T-206 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (A) Models SRK20ZSPR-S, 25ZSPR-S, 35ZSPR-S, 45ZSPR-S (1) Operation control function by wireless remote control Remote control 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 65 • 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. '17 •...
  • Page 66 '17 • SRK-T-206 (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 wireless 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 67 (i) Fuzzy 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 SRK20ZSPR-S SRK25ZSPR-S SRK35ZSPR-S SRK45ZSPR-S...
  • Page 68 SRK20ZJ-S (5) SRK25ZJ-S (5) SRK35ZJ-S (5) SRK50ZJ-S (5) 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 '17 • SRK-T-206 30~66rps 30~72rps 30~76rps 23~78rps Heating 30~40rps 30~42rps...
  • Page 69 (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 SRK20ZSPR-S SRK25ZSPR-S SRK35ZSPR-S SRK45ZSPR-S Fan speed...
  • Page 70 '17 • SRK-T-206 (12) Outline of automatic operation (a) Determination of operation mode The unit checks the indoor air temperature and the outdoor air temperature, determines the operation mode, and then begins in the automatic operation. Cooling 27.5 25.5 Dehumidifying Indoor air temperature (˚C) 18.0 Heating...
  • Page 71 '17 • SRK-T-206 2) When this control has continued for more than 30 minutes continuously,the following wind direction control is performed. 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 '09•SRK-DB-087D position.
  • Page 72 '17 • SRK-T-206 (d) Cooling high pressure control (i) Purpose: Prevents anomalous high pressure operation during cooling. (ii) Detector: Outdoor heat exchanger sensor (TH1) (iii) Detail of operation: (Example) Fuzzy 8rps After lapse of 20 sec. or over 8rps After lapse of 20 sec. or over After lapse of 20 sec.
  • Page 73 After the After the second times second times (iii) Reset conditions: '17 • SRK-T-206 Heating high pressure control (i) Purpose: (ii) Detector: (iii) Detail of operation: (Example) Fuzzy After lapse of 10 sec. or over 4rps 8rps After lapse of 10 sec. or over 4rps 8rps lower limit...
  • Page 74 Normal operation '17 • SRK-T-206 Outdoor air temperature(°C) Reset conditions: (h) Heating low outdoor temperature protective control Protective control I 1)  Operating conditions: When the outdoor air temperature (TH2) is lower than 2 (4)ºC or higher continues for 30 2)  Detail of operation:   changed as shown in the figure below.
  • Page 75 '17 • SRK-T-206 Current safe Purpose: Current is controlled not to exceed the upper limit of the setting operation current. (ii) Detail of operation: Input current to the converter is monitored with the current sensor fixed on the printed circuit board of the outdoor unit and, if the operation current value reaches the limiting current value, the compressor command speed is reduced.
  • Page 76 '17 • SRK-T-206 Outdoor fan motor protection Outdoor fan control at low outdoor temperature Cooling Operating conditions: Detail of operation: Outdoor fan Outdoor temperature > 10˚C Outdoor temperature < = 10˚C Reset conditions: (ii) Heating When the outdoor air temperature (TH2) is 4ºC (model SRK45 : 0ºC) or lower continues Operating conditions: for 30 seconds while the seconds while thecompressorcommand speed is other than 0 rps.

  • Page 77: B) Models Srk63Zspr-S,71Zspr-S,80Zspr-S

    '17 • SRK-T-206 (B) Models SRK63ZSPR-S, 71ZSPR-S, 80ZSPR-S (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 78 '09•SRK-DB-087D '17 • SRK-T-206 (2) Unit ON/OFF button wireless wireless (a) Operation (b) Details of operation COOL, DRY HEAT Function Indoor temperature Fan speed Flap/Louver Timer Switch setting Operation mode COOL Unit ON/OFF button HEAT (3) Auto restart function Jumper wire (JA1) (ii) (JA1) (4) Installing two air-conditioners in the same room...
  • Page 79 '17 • SRK-T-206 (5) Selection of the annual cooling function Jumper wire (JA3) (a) The annual cooling function can be enabled or disabled by means of the jumper wire (JA3) 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 80 ③ When the operation is retrieved from CLEAN or ALLERGEN CLEAR operation. (b) When the following operation are set, ECONOMY operation will be canceled. ① When the HI POWER/ECONO button is pressed again. '17 • SRK-T-206 ② When the operation mode is changed DRY to FAN. (c) Not operable while the air-conditioner is OFF.
  • Page 81 display Center installation Left Approx. 50° Left Approx. 20° Center Right Approx. 20° Right Approx. 50° '17 • SRK-T-206 (c) Swing (ii) In HEAT operation In COOL, DRY, FAN operation Approx. 5° Approx. 35° Approx. 60° Approx. 70° (d) Memory flap (Flap or louver stopped) '09•SRK-DB-087D (e) When not operating (9) 3D auto operation...
  • Page 82 Cooling Heating '17 • SRK-T-206 Flap Up/down swing Center (Fixed) Louver Cooling Heating Flap Horizontal blowing (Fixed) Slant forwardl blowing (Fixed) Wide (Fixed) Louver Operation mode Air flow direction contorol Indoor temp. – Setting temp. 2°C < = 2°C < Indoor temp. – Setting temp. 5°C <...
  • Page 83 (c) OFF timer operation '17 • SRK-T-206 (13) Installation location setting wireless (a) Setting If the air-conditioning unit is running, press the ON/OFF button to stop. (ii) Press the AIR FLOW U/D (UP/DOWN) button and the AIR FLOW L/R (LEFT/RIGHT) button together for 5 seconds Activating both up/down air swing and left/right air swing at the same time results in a multi-directional air flow.
  • Page 84 Compressor ON(HOT KEEP) Indoor fan motor Outdoor fan motor (few minutes ON) '17 • SRK-T-206 4-way valve (3 minutes ON) (b) Details of control at each operation mode (pattern) Fuzzy operation Model SRK63ZSPR-S SRK71ZSPR-S SRK80ZSPR-S Fan speed 12-120rps 20-116rps 20-120rps AUTO 12-120rps 20-116rps...
  • Page 85 1) 2) 3) '17 • SRK-T-206 − − satisfied (ii) (model SRK63 : 10 Continued operation time of defrost operation For more than 17 minutes. •Defrost operation Heating operation '09•SRK-DB-087D '09•SRK-DB-087D Max. 17 minutes 2~7 minutes Hot keep operation Depends on an operation condition, the time can be longer than 7 minutes. (15) Outline of cooling operation (15) Outline of cooling operation (a) Operation of major functional components in cooling mode...
  • Page 86 Fan speed 12-106rps 20-76rps 20-98rps AUTO 12-106rps 20-76rps 20-98rps AUTO 12-106rps 20-76rps 20-98rps AUTO 12-106rps 20-76rps 20-98rps 12-106rps 20-76rps 20-98rps 12-106rps 20-76rps 20-98rps 12-68rps 20-56rps 20-64rps 12-68rps 20-56rps 20-64rps 12-68rps 20-56rps 20-64rps '17 • SRK-T-206 12-50rps 20-40rps 20-46rps 12-50rps 20-40rps 20-46rps 12-50rps 20-40rps...
  • Page 87 '17 • SRK-T-206 (ii) Contents of operation Air capacity control Model SRK63ZSPR-S SRK71ZSPR-S SRK80ZSPR-S Item Upper limit of compressor’s command speed Range A: As per following table, Range B: 40 rps Note (1) Ranges A and B are as shown below. ●...
  • Page 88 '17 • SRK-T-206 (c) Cooling overload protective control Operating conditions:Reset conditions: When the outdoor air temperature (TH2) has become continuously for 30 seconds at 38(41) ℃ or more, with the compressor running, the lower limit speed of compressor is brought up. Model SRK63ZSPR-S Item...
  • Page 89 '17 • SRK-T-206 Heating high pressure control Purpose: temperature (ii) Detector: (iii) Detail of operation: (Example) Fuzzy 4rps 8rps After lapse of E sec. or over After lapse of E sec. or over 4rps 8rps Model 63 lower limit After lapse of E sec. or over speed F rps Model 71, 80 0rps...
  • Page 90 '17 • SRK-T-206 (h) Heating low outdoor temperature protective control Operating conditions: When the outdoor air temperature (TH2) is lower than 4℃ or higher continues for 30 seconds 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 91 Model Lower limit speed 25 rps 32 rps '17 • SRK-T-206 Current safe Current safe Purpose: Purpose: (ii) Detail of operation: (ii) Detail of operation: (k) Current cut (k) Current cut Purpose: Purpose: (ii) Detail of operation: (ii) Detail of operation: (l) Outdoor unit failure (l) Outdoor unit failure item (i), (ii) is satisfied.
  • Page 92 Outdoor fan motor protection '17 • SRK-T-206 Outdoor fan motor protection Outdoor fan control at low outdoor temperature Cooling Outdoor fan control at low outdoor temperature Operating conditions: Cooling Operating conditions: Detail of operation: Detail of operation: Outdoor fan Outdoor temperature > 10˚C Outdoor fan Outdoor temperature <...
  • Page 93 Outdoor temperature < = 16˚C '17 • SRK-T-206 Outdoor fan control at overload conditions. Cooling Operating conditions: When the outdoor air temperature (TH2) is 41℃(model SRK63:38℃) or higher continues Reset conditions: for 30 seconds while the compressor ON. Detail of operation: The outdoor fan is stepped up by 3 speed step. (Upper limit 8th speed). Reset conditions: When either of the fllowing conditions is satisfied.
  • Page 94 '17 • SRK-T-206 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 95 '17 • SRK-T-206 (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. See page 95 or 96. Is an error code displayed by Using the Service mode, access the self-diagnosis the self-diagnosis function? displays generated in the past.
  • Page 96 '17 • SRK-T-206 (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 wireless remote control 3 minutes or more after the emergency stop, the trouble display stops and the air-conditioner resumes operation. (a) Models SRK20, 25, 35, 45ZSPR-S Indoor unit display section Description Cause Display (flashing) condition...
  • Page 97 '17 • SRK-T-206 (b) Models SRK63, 71, 80ZSPR-S Wired Indoor unit display panel Description remote Cause Display (flashing) condition control TIMER of trouble display light light When a heat exchanger sensor 1 wire disconnection is detected while • Broken heat exchanger sensor 1-time 1 wire, poor connector operation is stopped.
  • Page 98 '09•SRK-DB-087D '17 • SRK-T-206 (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 controller. These are the contents of error displays and protective stops which occurred in the past in the air- conditioner system.
  • Page 99 '09•SRK-DB-087D '17 • SRK-T-206 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 100 '09•SRK-DB-087D '17 • SRK-T-206 (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 101 '09•SRK-DB-087D '17 • SRK-T-206 (i) Models SRK20, 25, 35, 45ZSPR-S (c) Error code, stop code table (i) Models SRK20, 25, 35, 45ZSPR-S Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light Error coad...
  • Page 102 '17 • SRK-T-206 (ii) Models SRK63, 71, 80ZSPR-S Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions 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 103 '09•SRK-DB-087D '17 • SRK-T-206 4-time flash 2-time flash. (d) Operation mode and 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 104 '17 • SRK-T-206 (e) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air tem- perature sensor temperature, outdoor heat exchanger sensor temperature table Unit: 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. Sensor value displayed when the error code is normal Sensor name -64ºC...
  • Page 105 '17 • SRK-T-206 (f) Discharge pipe temperature table Unit: 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 106 '17 • SRK-T-206 (g) Service data record form (i) Models SRK20, 25, 35, 45ZSPR-S Model Customer Date of investigation Machine name Content of complaint Remote control settings Display results 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 107 '09•SRK-DB-087D '17 • SRK-T-206 (ii) Models SRK63, 71, 80ZSPR-S Wireless r Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r wireless...
  • Page 108 '09•SRK-DB-087D '17 • SRK-T-206 (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 109 '09•SRK-DB-087D '17 • SRK-T-206 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. 118. ＊   ＊ SRK20, 25, 35 : 4.293Ω (U-V, V-W, U-W) or more at 20ºC SRK45 : 1.104Ω...
  • Page 110 '09•SRK-DB-087D '17 • SRK-T-206 Over heat of compressor Gas shortage, defective discharge pipe sensor 107) Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB ②-③ ②-③ ①-②...
  • Page 111 '09•SRK-DB-087D '17 • SRK-T-206 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 ◆     Poor defrost operation   Notes (1) 118. Check coil wire resistance, see page 108. resistance and coil wire resistance of ．...
  • Page 112 '17 • SRK-T-206 Rotor lock Defective compressor, defective outdoor PCB See page 108. 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 (Models SRK63, 71, 80 only) Phenomenon Operation Sensor...
  • Page 113 '17 • SRK-T-206 (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 114 Replace indoor PCB. blocks ② and ③ oscillating between DC 0 and 20V? '17 • SRK-T-206 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 115 (Example) Operation SW ON Measure in this section RUN light : ON TIMER light: 2 time flash Output voltage (ACV) '17 • SRK-T-206 (10) How to make sure of wireless remote control 8~10 sec. 1 sec. 3 min. 1 sec. 3 min.
  • Page 116 '17 • SRK-T-206 (11) Inspection procedure for blown fuse on the indoor and outdoor PCB Go to the inspection procedure for electric Is the fuse blown on the indoor and equipment of indoor and outdoor units outdoor PCB? (See pages 112 to 119.) Faulty part, other than fan motor Is there any faulty part (fan motor, etc)?
  • Page 117 '17 • SRK-T-206 (12) Outdoor unit inspection points Models SRK20, 25, 35, 45ZSPR-S...
  • Page 118 '17 • SRK-T-206 Models SRK63, 71, 80ZSPR-S 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 unit is stopped. : AC 220/230/240V : AC 220/230/240V Color symbol : Normal if the voltage oscillates between...
  • Page 119 '17 • SRK-T-206 (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 120          source ② '17 • SRK-T-206 • Models SRK63, 71, 80ZSPR-S Measuring Voltage range when point normal ⑥ − ④ 280-373V ③ − ④ ② − ④ ⑥ ⑤ ④ ③ ② ① ⑥ ⑤ ④ ③ ② ① CNFAN Outdoor PCB DC several (4~7V) DC280-373V DC15V...
  • Page 121 '17 • SRK-T-206 11. OPTION PARTS Installation manual for wired remote controller PJA012D730 Connect the remote control cord (1) Wired remote control (RC-E5) terminal block. Connect the terminal of remote c Read together with indoor unit's installation manual. with the terminal of indoor unit (X (X and Y are no polarity) WARNING Wiring route is as shown in the r Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the...
  • Page 122 '17 • SRK-T-206 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 123 '17 • SRK-T-206 P JA0 1 2 D7 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. Upper case Upper case Board Heating : 16 - 30°C (55 - 86°F) Except heating (cooling, fan, dehumidifying, automatic) : 18 - 30°C (62 - 86°F) Upper limit and lower limit of set temperature can be changed with remote control.
  • Page 124 '17 • SRK-T-206 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 125 '17 • SRK-T-206 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 126 '17 • SRK-T-206 PJA012 D7 30 d is automatically defined as following table. Operation message How to set function Function description: ctable indoor unit. Function No. Stop air-conditioner and press (SET) (MODE) setting description: o-RUN" mode buttons at the same time for over three seconds, and the hree step of air flow setting "FUNCTION SET "...
  • Page 127 '17 • SRK-T-206 (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 128 '17 • SRK-T-206 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 129 '17 • SRK-T-206 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 130 '17 • SRK-T-206 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 131 '17 • SRK-T-206 (3) Superlink E board (SC-ADNA-E) central control...
  • Page 132 '17 • SRK-T-206...
  • Page 133 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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