Mitsubishi Heavy Industries SRK18YLV-S1 Technical Manual
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Mitsubishi Heavy Industries SRK18YLV-S1 Technical Manual

Inverter wall mounted type residential air-conditioner
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Manual No.'16•SRK-T-192
RESIDENTIAL AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONER
(Split system, air cooled cooling only type)
SRK18YLV-S1

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  • Page 1 Manual No.'16•SRK-T-192 RESIDENTIAL AIR-CONDITIONING TECHNICAL MANUAL & PARTS LIST INVERTER WALL MOUNTED TYPE RESIDENTIAL AIR-CONDITIONER (Split system, air cooled cooling only type) SRK18YLV-S1...
  • Page 3 TECHNICAL MANUAL...

  • Page 4: Table Of Contents

    '16 • SRK-T-192 CONTENTS 1. SPECIFICATIONS ..................2. EXTERIOR DIMENSIONS ................(1) Indoor unit .................... (2) Outdoor unit ..................(3) Wireless remote control ................ 3. ELECTRICAL WIRING ................... 7 (1) Indoor unit ....................7 (2) Outdoor unit ................... 8 4. PIPING SYSTEM ...................
  • Page 5 '16 • SRK-T-192 Phenomenon observed after shortcircuit, wire breakage on sensor (9) Checking the indoor electrical equipment (10) How to make sure of wireless remote control (11) Outdoor unit inspection points ■How to read the model name Example: SRK 18 Y LV-S1 Series code Inverter type...

  • Page 6: Specifications

    '16 • SRK-T-192 1. SPECIFICATIONS Adapted to RoHS directive SRK18YLV-S1 Model Indoor unit SRK18YLV-S1 Outdoor unit SRC18YLV-S1 Item Cooling capacity (1) 5000 (1600 (Min.)~5500 (Max.)) Power source 1 Phase, 220-240V, 50Hz Power Cooling 1.56 (0.40~2.20) consumption Running Cooling current Operation...

  • Page 7: Exterior Dimensions

    '16 • SRK-T-192 2. EXTERIOR DIMENSIONS (1) Indoor unit Model SRK18YLV-S1...

  • Page 8: Outdoor Unit

    '16 • SRK-T-192 (2) Outdoor unit Model SRC18YLV-S1...

  • Page 9: Wireless Remote Control

    '16 • SRK-T-192 (3) Wireless remote control Unit: mm 17.3...

  • Page 10: Electrical Wiring

    '16 • SRK-T-192 3. ELECTRICAL WIRING (1) Indoor unit Model SRK18YLV-S1 LOUVER LOUVER FLAP MOTOR MOTOR MOTOR MOTOR （R） （L） HEAT EXCHANGER CONTROL 1 3 4 5 WHITE VARISTOR BLACK FUSE 250V 3.15A PRINTED CIRCUIT BOARD YELLOW／GREEN 2／N TERMINAL BLOCK...

  • Page 11: Outdoor Unit

    '16 • SRK-T-192 (2) Outdoor unit Model SRC18YLV-S1...

  • Page 12: Piping System

    '16 • SRK-T-192 4. PIPING SYSTEM Model SRK18YLV-S1 Cooling cycle Indoor unit Outdoor unit Outdoor air Flare temperature sensor connection Service valve (TH2) (Gas) Discharge pipe Gas pipe temperature sensor Check joint Heat (φ12.7) Room temperature (TH3) exchanger sensor sensor...

  • Page 13: Range Of Usage & Limitations

    '16 • SRK-T-192 5. RANGE OF USAGE & LIMITATIONS Model SRK18YLV-S1 Item Indoor return air temperature Cooling operation : Approximately 21 to 32 D.B. (Upper, lower limits) (Refer to the selection chart) Outdoor air temperature Cooling operation : Approximately 21 to 43 D.B.
  • Page 14 '16 • SRK-T-192 (2) Correction of cooling capacity in relation to one way length of refrigerant piping Piping length [m] Cooling 0.99 0.975 0.965 0.95 0.935 How to obtain the cooling capacity SRK18YLV-S1 5000 4875 SRK18YLV-S1...

  • Page 15: Application Data

    '16 • SRK-T-192 6. APPLICATION DATA Safety precautions • When install the unit, be sure to check whether the selection of installation place, power source specifications, usage limitation (piping length, height differences between indoor and outdoor units, power source voltage and etc.) and installation spaces. •...
  • Page 16 '16 • SRK-T-192 CAUTION • Use the circuit breaker with sufficient breaking capacity. • Take care when carrying the unit by hand. If the breaker does not have sufficient breaking capacity, it can cause the unit If the unit weights more than 20kg, it must be carried by two or more persons. malfunction and fire. Do not carry by the plastic straps, always use the carry handle when carrying the unit by hand. Use gloves to minimize the risk of cuts by the aluminum •...

  • Page 17: Selection Of Installation Location

    '16 • SRK-T-192 Standard accessories Necessary tools for the installation work (Installation kit) Q'ty Plus headed driver (Phillips screwdriver) Accessories for indoor unit Knife Installation board ① (Attached to the rear of the indoor unit) ② Wireless remote control Tape measure ③...

  • Page 18: Installation Of Indoor Unit

    '16 • SRK-T-192 Limitations for one way piping length and vertical height difference Model SRK18YLV-S1 Item Total one way Max.  m piping length ( ) Vertical height Max.  m difference (h) Installation of indoor unit Installation of installation board...
  • Page 19 '16 • SRK-T-192 Terminal block Preparation of indoor unit ① Mounting of connecting wires Screw* ⓐ Remove the lid. ⓑ Remove the wiring clamp. Clamp ⓒ Connect the connecting wire securely to the terminal block. Use cable for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables. H05RNR4G1.5 (Example) or 245IEC57 Harmonized cable type 05 300/500 volts Lid (R) * Leave space to allow Natural-and/or synth. rubber wire insulation removal of this screw Polychloroprene rubber conductors insulation...
  • Page 20 '16 • SRK-T-192 ⑤ Securing the indoor unit to the installation board Indoor unit Installing steps Installation board Latch (2 locations) 1.Hook the upper part of the indoor unit to the installation board. Installation board 2.The unit can be installed Wall simply by gently push- ing in the lower part. Indoor unit base lower latch •...

  • Page 21: Installation Of Outdoor Unit

    '16 • SRK-T-192 Installation of outdoor unit ① Make sure that the unit is stable in installation. Fix the Outdoor unit unit to stable base. ② When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire, etc. ③ Perfrom wiring, making wire terminal numbers conform When wire length exceeds 30m, 2.0-mm wires.

  • Page 22: Air Purge

    '16 • SRK-T-192 Air purge ① Tighten all flare nuts in the pipings both Compound pressure gauge Service valve Pressure gauge indoor and outside so as not to cause Service valve leak. Gauge manifold (two-way valve) (Designed specifically for R410A) -0.1MPa ② Connect service valve, charge hose, (-76cmHg) manifold valve and vacuum pump as is Handle Lo...

  • Page 23: Installation Of Remote Control Switch

    '16 • SRK-T-192 Installation of remote control switch Mounting method of battery Fixing to pillar or wall • Uncover the remote control switch, and mount the batter- • Conventionally, operate the wireless remote control by ies [R03(AAA, Micro) × 2 pieces] in the body regularly. holding in your hand. (Fit the poles with the indication marks, ⊕ & ⊖ without • Avoid installing it on a clay wall etc. fail) Battery CAUTION Do not use new and old batteries together.

  • Page 24: Outline Of Operation Control By Microcomputer

    '16 • SRK-T-192 7. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER Operation and indication section for remote control (1) Operation control function by remote control SRK10YJV-S Remote control SRK13YJV-S S Operation section Operation section FAN SPEED button OPERATION MODE select button Each time the button is pushed, the Each time the button pushed, the indicator is switched over in turn.

  • Page 25: Unit On/Off Button

    Unit indication section SRK10YJV-S RUN light (green) SRK13YJV-S '16 • SRK-T-192 Illuminates during operation and CLEAN operation. TIMER light (yellow) Illuminates during TIMER operation. (2) Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off.

  • Page 26: Flap And Louver Control

    '09•SRK-DB-087D '16 • SRK-T-192 (5) Flap and louver control (a) Flap (Flap stopped) (Swing) Angle of Flap from Horizontal Remote control display COOL , DRY, FAN Approx. 10° Approx. 20° Approx. 30° Approx. 45° Approx. 60° (b) Louver (Louver stopped) (Swing) (Spot) (Wide)

  • Page 27: Auto Operation

    '09•SRK-DB-087D '16 • SRK-T-192 (6) 3D auto operation Air flow selection Operation mode AUTO < = Indoor temp. – Setting temp. >5°C Indoor temp. – Setting temp. 5°C Cooling HIGH POWER AUTO (ii) Cooling Flap Up/down Swing Wide (Fixed) Louver Cooling Horizontal blowing (Fixed) Flap...

  • Page 28: Installation Location Setting

    '09•SRK-DB-087D '16 • SRK-T-192 (7) Timer operation (a) Comfortable timer setting (ON timer) (b) Sleep timer operation (c) OFF timer operation (8) Installation location setting Installation location setting (a) Setting Take the air conditioning unit’s location into account and adjust the left/right a If the air-conditioning unit is running, press the ON/OFF button to stop.
  • Page 29 (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 SRK18YLV-S1 Fan speed Auto 23~96rps 23~96rps...

  • Page 30: Outline Of Automatic Operation

    '16 • SRK-T-192 (11) 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) 19.5 Outdoor air temperature (˚C)

  • Page 31: Protective Control Function

    '16 • SRK-T-192 (12) Protective control function (a) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) (i) Operating conditions Compressor Indoor heat exchanger temperature (Th) is lower than ºC. command speed  minutes after reaching the compressor command speed except 0 rps. Upper (ii) Detail of anti-frost operation limit...
  • Page 32 '16 • SRK-T-192 (d) Current safe (i) 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 33: Maintenance Data

    '09•SRK-DB-087D '16 • SRK-T-192 Reference Reference 8. MAINTENANCE DATA 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT (1) Cautions (2) Items to check before troubleshooting source (3) Troubleshooting procedure (If the air-conditioner does not run at all) satisfied Important source wireless proced-...
  • Page 34 '09•SRK-DB-087D '16 • SRK-T-192 (4) Troubleshooting procedure (If the air-conditioner runs) 33 - 36. 33 - 36.
  • Page 35 '16 • SRK-T-192 (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 36 '09•SRK-DB-087D '16 • SRK-T-192 (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 37 '09•SRK-DB-087D '16 • SRK-T-192 safe 4-time flash 3-time flash. safe 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 38 Displays the reason for the stop (error code) 2 times previous when an error was displayed. 22ºC Cooling 23ºC Displays the reason for the stop (error code) 3 times previous when an error was displayed. Displays the reason for the stop (error code) 4 times previous when an error was displayed. 24ºC '16 •...
  • Page 39 '16 • SRK-T-192 Number of flashes when in service mode Stop code Error content Auto Error Occurrence conditions Cause TIMER recovery display light light Error code Minor category Major category (10’s digit) (1’s digit) Overcharge Cooling overload 1 When there is a current safe stop in overload 1 mode 1-time Compressor lock (outdoor temperature:...
  • Page 40 '09•SRK-DB-087D '16 • SRK-T-192 safe 4-time flash 3-time flash. safe (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 41 '09•SRK-DB-087D '16 • SRK-T-192 (e) Temperatare information Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger 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 Sensor name...
  • Page 42 '09•SRK-DB-087D '16 • SRK-T-192 (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 43 '09•SRK-DB-087D '16 • SRK-T-192 Service data record form Wireless r Operation mode Fan speed mode Wireless r Wireless r Wireless r Wireless r Wireless r...

  • Page 44: Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '16 • SRK-T-192 (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 45 '09•SRK-DB-087D '16 • SRK-T-192 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. ＊   ＊ 1.417Ω (U-V), 1.392Ω (V-W), 1.435Ω (W-U) or more at 20ºC Current safe stop Overload operation, compressor lock, overcharge...
  • Page 46 '09•SRK-DB-087D '16 • SRK-T-192 Over heat of compressor Gas shortage, defective discharge pipe sensor Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB source ② ③ ② ③ ① ②...
  • Page 47 '09•SRK-DB-087D '16 • SRK-T-192 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB source source ◆       Notes (1) wire ． Outdoor fan motor error Defective fan motor, connector poor connection, defective outdoor PCB the fan motor and outdoor Replace outdoor fan motor...
  • Page 48 '16 • SRK-T-192 Rotor lock Defective compressor, defective outdoor PCB See page 42. (8) Phenomenon observed after shortcircuit, wire breakage on sensor (a) Indoor unit (8) Phenomenon observed after shortcircuit, wire breakage on sensor Phenomenon Sensor (a) Indoor unit Shortcircuit Disconnected wire Phenomenon Room temperature...
  • Page 49 Replace indoor PCB. blocks ② and ③ oscillating between DC 0 and 20V? '16 • SRK-T-192 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 50 Operation SW ON Measure in this section '16 • SRK-T-192 (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 51 '16 • SRK-T-192 (11) Outdoor unit inspection points Model SRK18YLV-S1...
  • Page 52 '09•SRK-DB-087D '16 • SRK-T-192 (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          source ② Measuring Voltage range when point...
  • Page 53 '16 • SRK-T-192...

  • Page 54: Parts List

    '16 • SRK-T-192 PARTS LIST INDOOR UNIT SRK18YLV-S1 OUTDOOR UNIT SRC18YLV-S1...
  • Page 55 '16 • SRK-T-192 PANEL & FAN ASSY CRAE0229...
  • Page 56 '16 • SRK-T-192 SRK18YLV-S1 CRAE0229 END ITEM NO. : RMA002F016AC Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 100 500 1000 1 6 RMA102A100C PANEL ASSY,FRONT 1 RKX122A300N PANEL,FRONT 2 RMA435A100B PANEL,AIR INLET 2 W315.5×H299.7(t2) 3 RKX437A300 FILTER,AIR 4 RKX129A013...
  • Page 57 '16 • SRK-T-192 HEAT EXCH. & CONTROL CRAE0254...
  • Page 58 '16 • SRK-T-192 SRK18YLV-S1 CRAE0254 END ITEM NO. : RMA002F016AC Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 100 500 1000 1 8 RKX301A011P HEAT EXCH ASSY(AIR) 2 RKX315D007 HEADER ASSY 3 RKX321A038 PIPE 4 RKX129A016 BRACKET ASSY(L) 5 7 RKX321A001B...
  • Page 59 '16 • SRK-T-192 PANEL & FAN ASSY CRBE0294...
  • Page 60 '16 • SRK-T-192 SRC18YLV-S1 CRBE0294 END ITEM NO. : RMC003F022Z Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 100 500 1000 1 RCV122A005 PANEL,FRONT 2 RCV123A005B PANEL,SIDE(R) 3 RCV124A003 PANEL,TOP 4 RCV132A004 COVER ASSY,SERVICE 5 RCV435A001A GRILLE,AIR OUTLET 6 SSA944B036B HANDLE 7 RCV142A001 COVER(TB)
  • Page 61 '16 • SRK-T-192 HEAT EXCH. & CONTROL (LIQ.) (GAS) 28 23 23・26 23・27 CRBE0342 CONTROL ASSY...
  • Page 62 '16 • SRK-T-192 SRC18YLV-S1 CRBE0342 END ITEM NO. : RMC003F022Z Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 100 500 1000 1 RCV301A204A HEAT EXCH ASSY(AIR) 2 3 RCV304A205 PIPING ASSY(EXPAN) 2 SSA387F051 VALVE,BODY(EXP) 3 RCV315B202A CAPILLARY 2.6× 4.0 L300 4 RCS116A004 BRACKET,VALVE 5 RCS381A004B...
  • Page 63 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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