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Mitsubishi SRK90CL-BN Technical Manual

Wall mounted type
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Manual No.'12•SRK-T-122
TECHNICAL MANUAL

WALL MOUNTED TYPE

RESIDENTIAL AIR-CONDITIONERS
(Split system, air cooled cooling only type)
SRK90CL-BN

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Summary of Contents for Mitsubishi SRK90CL-BN

  • Page 1: Wall Mounted Type

    Manual No.'12•SRK-T-122 TECHNICAL MANUAL WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONERS (Split system, air cooled cooling only type) SRK90CL-BN...

  • Page 2: Table Of Contents

    '11 • SRK-T-122 '12 • SRK-T-122 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................. (1) Indoor unit ..................(2) Outdoor unit ..................(3) Remote controller ................. 3. ELECTRICAL WIRING ................(1) Indoor unit ..................(2) Outdoor unit ..................4. NOISE LEVEL ....................
  • Page 3 '12 • SRK-T-122 ........... 38 (8) Checking the indoor electrical equipment (9) How to make sure of wireless remote controller ......... 39 11. OPTION PARTS ..................40 11.1 Instullation of wired remote controller (RC-E5) ......... 40 11.2 Interface kit (SC-BIKN-E) ..............

  • Page 4: Specifications

    '12 • SRK-T-122 1. SPECIFICATIONS Adapted to RoHS directive SRK90CL-BN Model Item Indoor unit SRK90CL-BN Outdoor unit SRC90CL-BN 8300 Cooling capacity (1)-(a) (1)-(b) 7550 1 Phase, 220 ～ 240 V, 50Hz Power supply Power Cooling (1)-(a) 2.92 / 3.03 ( 220 / 240 V )
  • Page 5 1090 Symbol Content 43.5 Gas piping φ15.88（5／8"）（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） 1098 Wireless remote controller Outlet for down piping （Refer to the above view）...
  • Page 6 Symbol Content Note Service valve connection（gas side） φ15.88（5／8"）（Flare） （1）It must not be surrounded by walls on four sides. Service valve connection（liquid side） φ6.35（1／4"）（Flare） Pipe／cable draw-out hole （2）The unit must be fixed with anchor bolts. An anchor bolt Drain discharge hole φ20 x 3 places must not protrude more than 15mm.

  • Page 7: Remote Controller

    '12 • SRK-T-122 (3) Remote controller (a) Wireless remote controller Unit: mm 17.3...
  • Page 8 '12 • SRK-T-122 (b) Wired remote controller (option parts) Interface kit (SC-BIKN-E) is required to use the wired remote controller. 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 9 Item Description PRINTED DISPLAY CIRCUIT CNE-CNX2 Connector WIRELESS RECEIVER CNX1 BOARD BACK-UP SW Fan motor Flap motor Louver motor Room temp. sensor Heat exch. sensor CNX2 Humidity sensor Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN Color Marks Mark Color Black Blue...
  • Page 10 POWER SOURCE 1～ 220／230／240V 50Hz FUSE ＋ ～ 250V 3.15A － ～ 52X2 52X3 1～ 52X1 52X4 TO INDOOR UNIT CNFAN 2／N CONTROL PWB POWER WIRES SIGNAL WIRE CNTH CNEEV ITEM DESCRIPTION COMPRESSOR MOTOR FAN MOTOR ELECTRIC EXPANSION VALVE（COIL） 1～ HEAT EXCHANGER SENSOR OUTDOOR AIR TEMP.

  • Page 11: Indoor Unit

    '12 • SRK-T-122 4. NOISE LEVEL Condition ISO-T3,SASO 385/386 Mike position as below ● (Indoor Unit) 0.8m Model SRK90CL-BN Unit Mike position Noise Cooling 51 dB(A) (Center & Low points) － dB(A) Level Heating × ..Cooling Mike position: at highest noise level in position as mentined below ●...

  • Page 12: Piping System

    '12 • SRK-T-122 5. PIPING SYSTEM Model SRK90CL-BN Indoor unit Outdoor unit Cooling cycle Flare connection Service valve Outdoor air (Gas) temp. sensor (TH2) Gas pipie Check joint Discharge pipe (φ15.88) Humidity temp. sensor sensor (TH3) (Th3) Heat exchanger sensor...

  • Page 13: Range Of Usage & Limitations

    '12 • SRK-T-122 6. RANGE OF USAGE & LIMITATIONS Models SRK90CL-BN Item Indoor return air temperature Cooling operation: Approximately 21 to 32°C (Upper, lower limits) Outdoor air temperature Cooling operation: Approximately 21 to 54°C (Upper, lower limits) Refrigerant line (one way) length Max.
  • Page 14 0.95 How to obtain the cooling capacity Example : The net cooling capacity of the model SRK90CL-BN with the piping length of 15m, indoor wet-bulb temperature at 19.0 °C ． and outdoor dry-bulb temperature 35 °C is Net cooling capacity = 8.30...

  • Page 15: Capacity Tables

    '12 • SRK-T-122 7. CAPACITY TABLE Model SRK90CL-BN Cool Mode Indoor air temp Outdoor 21˚CDB 23˚CDB 26˚CDB 27˚CDB 28˚CDB 31˚CDB 33˚CDB Air flow 14˚CWB 16˚CWB 18˚CWB 19˚CWB 20˚CWB 22˚CWB 24˚CWB air temp. 8.46 6.43 8.91 6.35 9.38 6.61 9.60 6.55 9.79...

  • Page 16: Application Data

    8. APPLICATION DATA RKW012A405 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 differences between indoor and outdoor units, power supply voltage and etc.) R22 REFRIGERANT USED and installation spaces.
  • Page 17 • Do not put the drainage pipe directly into drainage channels where high, which can cause burst and personal injury. • Do not run the unit with removed panels or protections. poisonous gases such as sulphide gas can occur. • Do not processing, splice the power cord, or share a socket with other Touching rotating equipments, hot surfaces or high voltage parts can cause personal Poisonous gases will flow into the room through drainage pipe and seriously affect the power plugs.
  • Page 18 12A405 DITIONER 6.5 cm minimum from the ceiling T USED Installation board ective clothing, • Indoor unit dimensions Model Hight × Width × Depth (cm) SRK90 31.8 × 109.8 × 24.8 CAUTION Indoor side Outdoor side Sleeve prevent Completely seal the hole on (sold separately) putty the wall with putty.
  • Page 19 or protections. • Outdoor unit dimensions The screw of the high voltage parts can cause personal side cover is cks. Model Hight × Width × Depth (cm) tightened securely. device itself or its setup condition. No obstacles SRC90 75.0 × 88.0 × 34.0 (an enough open space) tive device of pressure switch and fied component can cause fire or burst.

  • Page 24: Outline Of Operation Control By Microcomputer

    '12 • SRK-T-122 9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote controller Remote controller ◆ Operation section Unit display section TIMER HI POWER 3D AUTO ON/OFF RUN light (green) 3D AUTO light (green) Illuminates during 3D AUTO operation. Illuminates during operation.

  • Page 25: Unit On/Off Button

    '09•SRK-DB-087D '12 • SRK-T-122 (2) Unit ON/OFF button (a) Operation (b) Details of operation Function Indoor temperature Fan speed Flap/Louver Timer Switch setting operation mode Cooling Thermal dry Unit ON/OFF button (3) Auto restart function Jumper wire (J170) (J170) Jumper wire (J171) (4) Custom cord switching procedure (a) Modifying the indoor printed circuit board (J171)

  • Page 26: Flap And Louver Control

    '09•SRK-DB-087D '12 • SRK-T-122 (5) Flap and louver control (a) Flap (Flap stopped) (Swing) Angle of Flap from Horizontal Remote controller display COOL , DRY, FAN Approx. 10° Approx. 20° Approx. 35° Approx. 45° Approx. 60° (b) Louver (Louver stopped) (Swing) (Spot) (Wide)

  • Page 27: Auto Operation

    '09•SRK-DB-087D '12 • SRK-T-122 (6) 3D auto operation Air flow selection Operation mode AUTO < = Indoor temp. – Setting temp. >5°C Indoor temp. – Setting temp. 5°C At cooling HIGH POWER AUTO Cooling Flap Up/down Swing Louver Wide (Fixed) Cooling Flap Horizontal blowing (Fixed)

  • Page 28: Timer Operation

    '09•SRK-DB-087D '12 • SRK-T-122 (7) Timer operation (a) Comfortable timer setting (ON timer) (b) Sleep timer operation (c) OFF timer operation (8) Installation location setting (a) Setting If the air conditioning unit is running, press the ON/OFF button to stop. Press the AIR FLOW (UP/DOWN) button and the AIR FLOW...

  • Page 29: Outline Of Cooling Operation

    Failure Compressor Indoor fan motor Outdoor fan motor (few minutes ON) (few minutes ON) (b) Fan speed switching Model SRK90CL-BN Fan speed Auto Auto fan control Speed 8 Speed 6 Speed 4 (10) 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.

  • Page 30: Protective Control Function

    '12 • SRK-T-122 (11) Protective control function (a) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) Operating conditions Indoor heat exchanger temperature (TH2) is lower than 2.5ºC. 3 minutes elapsed after the start of operation. Detail of frost prevention operation Compressor Indoor fan Protects the fan tap just before frost prevention control.
  • Page 31 '12 • SRK-T-122 (g) Compressor overheat protection If the discharge pipe temperature (sensed by TH3) exceeds the set temperature value, the compressor stops. If the temperature is 95ºC or lower after a 3-minute delay, it starts again, but if this function is reactivated again within 60 minutes, it results in an abnormal stop. (RUN light : ON, TIMER light : 5 time flash) Operation possible Abnormal stop...

  • Page 32: Maintenance Data

    '12 • SRK-T-122 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 33: Troubleshooting Procedure (If The Air Conditioner Runs)

    '12 • SRK-T-122 (4) Troubleshooting procedure (If the air conditioner runs)

  • Page 34: Self-Diagnosis Table

    '12 • SRK-T-122 (5) Self-diagnosis table Wired Indoor unit display panel remote Description Cause Display (flashing) condition controller TIMER of trouble display light light When a heat exchanger sensor 1 wire disconnection is detected while • Broken heat exchanger sensor 1 time Heat exchanger 1 wire, poor connector...

  • Page 35: Inspection Procedures Corresponding To Detail Of Trouble

    '12 • SRK-T-122 (6) Inspection procedures corresponding to detail of trouble Sensor error [Broken sensor wire, connector poor connection] Is connector connection good? Correct connection. Is sensor resistance value good? Replace sensor. Replace PCB. ◆ Sensor temperature characteristics ◆ Sensor temperature characteristics (Room temp., indoor heat exchanger temp., (Outdoor heat exchanger temp., discharge pipe temp.) outdoor air temp.)
  • Page 36 '09•SRK-DB-087D '12 • SRK-T-122 Over heat of compressor Gas shortage, defective discharge pipe sensor main Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB ② ③ indoor ② ③ indoor ① ② outdoor sub...
  • Page 37 '09•SRK-DB-087D '12 • SRK-T-122 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB ◆ main   main ．...

  • Page 38: Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '12 • SRK-T-122 See pages 53. (7) Phenomenon observed after shortcircuit, wire breakage on sensor (a) Indoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Room temperature Cooling sensor Heat exchanger Cooling sensor Humidity sensor Cooling ■ Humidity sensor operation Failure mode Control input circuit resding Air conditioning system operation...
  • Page 39 Heat exchanger Cooling sensor Ourdoor air '12 • SRK-T-122 Cooling temperature sensor Discharge pipe All modes sensor (8) Checking the indoor electrical equipment (a) Indoor PCB check procedure Is there voltage between terminal Inspect power source blocks ① and ② ? (AC 220-240V) for outdoor unit.
  • Page 40 Operation SW ON Measure in this section '12 • SRK-T-122 (9) How to make sure of wireless remote controller The figare below shows the SRK series.

  • Page 41: Optional Parts

    '12 • SRK-T-122 11. OPTIONAL PARTS PJA012D730 Installation manual for wired remote controller 11.1 Instullation of wired remote controller (RC-E5) Connect the remote cont terminal block. Connect the terminal of r Read together with indoor unit's installation manual. with the terminal of indoo (X and Y are no polarity) WARNING Wiring route is as shown...
  • Page 42 '12 • SRK-T-122 ote controller Connect the remote controller cord to the Sheath Sheath The range of temperature settin terminal block. When shipped, the range of set te Connect the terminal of remote controller (X,Y) Upper case Upper case Board Board Heating : 16 ~ 30˚C (55 ~ 86˚F with the terminal of indoor unit (X,Y).
  • Page 43 '12 • SRK-T-122 P J A 0 1 2 D 7 2 9 A Sheath The range of temperature setting When shipped, the range of set temperature differs depending on the operation mode as below. 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 controller.
  • Page 44 '12 • SRK-T-122 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote controller 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 45 '12 • SRK-T-122 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 controller function02 Indoor unit without "Auto-RUN" mode Indoor unit with two or three step of air flow setting Remote controller function06...
  • Page 46 '12 • SRK-T-122 P J A 0 1 2 D 7 2 9 A y defined as following table. Operation message How to set function Function description: Function No. Stop air-conditioner and press (SET) (MODE) setting description: buttons at the same time for over three seconds, and the flow setting "FUNCTION SET "...
  • Page 47 '12 • SRK-T-122 11.2 Interface kit (SC-BIKN-E) RKZ012A088 Safety precautions Before use, please read these Safety Precautions thoroughly before installation. ●All the cautionary items mentioned below are important safety related items to be taken Accessories included in package into consideration, so be sure to observe them at all times. Be sure to check all the accessories included in package.
  • Page 48 '12 • SRK-T-122 Installation of the interface ・Install the interface within the range of the connection cable length (approximately 1.3m) from the indoor unit. 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 49 '12 • SRK-T-122 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 50 '12 • SRK-T-122 Connection of wired remote controller Regarding the connection of wired remote controller, refer to the instruction manual of wired remote controller. ①Switch ON the DIP switch SW2-2 (Factory setting : ON) on the interface PCB. DIP suitch Caution:Wireless remote controller attached to the indoor unit can be used in parallel, after connecting the wired remote controller.
  • Page 51 '12 • SRK-T-122 11.3 Super link E board (SC-ADNA-E) SL2NA-E, and SL3N-AE/BE to control...
  • Page 52 '12 • SRK-T-122...
  • Page 53 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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