Mitsubishi Electric MS-30SV-A1 Service Manual

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SPLIT-TYPE, AIR CONDITIONER

SERVICE MANUAL

Wireless type
Model
MS-30SV -
MS-30SV -
A1
· MU-30SV -
( WH )
A1
A1
CONTENTS
1. PART NAMES AND FUNCTIONS······················2
2. SPECIFICATION·················································4
3. NOISE CRITERIA CURVES ·······························5
4. OUTLINES AND DIMENSIONS ·························6
5. WIRING DIAGRAM ············································8
6. REFRIGERANT SYSTEM DIAGRAM ··············10
7. PERFORMANCE CURVES ······························11
8. MICROPROCESSOR CONTROL ····················15
9. SERVICE FUNCTIONS ····································24
10. TROUBLESHOOTING······································26
11. DISASSEMBLY INSTRUCTIONS·····················40
12. PARTS LIST······················································44
13. OPTIONAL PARTS ······················BACK COVER
No. OB255

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  Summary of Contents for Mitsubishi Electric MS-30SV-A1

  • Page 1: Table Of Contents

    SPLIT-TYPE, AIR CONDITIONER No. OB255 SERVICE MANUAL Wireless type Model MS-30SV - · MU-30SV - ( WH ) CONTENTS 1. PART NAMES AND FUNCTIONS······················2 2. SPECIFICATION·················································4 3. NOISE CRITERIA CURVES ·······························5 4. OUTLINES AND DIMENSIONS ·························6 5. WIRING DIAGRAM ············································8 MS-30SV - 6.
  • Page 2: Part Names And Functions

    PART NAMES AND FUNCTIONS INDOOR UNIT MS-30SV - Grille (When the grille is opened) Operation Indicator OUTDOOR UNIT MU-30SV -...
  • Page 3: Remote Controller

    REMOTE CONTROLLER MS-30SV - Signal transmitting section Operation display section OPERATE/ STOP (ON/ OFF)button ON/OFF WARM COOL TEMPERATURE buttons Open the front lid. CLOCK ON/OFF WARM COOL VANE button FAN SPEED CONTROL button STOP (Horizontal vane button) I FEEL COOL OFF-TIMER button VANE START...
  • Page 4: Specification

    SPECIFICATION Indoor model MS-30SV - Cooling Function Single phase Power supply 240V, 50Hz Capacity Air flow(Hi) K /h Dehumidification Power outlet 15.9 Running current Power input 3,560 Auxiliary heater A(kW) — Power factor 55 (with soft starter) Starting current Fan motor current 0.35 Coefficient of performance(C.O.P) 2.36...
  • Page 5: Noise Criteria Curves

    NOISE CRITERIA CURVES MS-30SV- MU-30SV- NOTCH SPL(dB(A)) LINE NOTCH SPL(dB(A)) LINE FUNCTION FUNCTION COOLING COOLING Test conditions, Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24: NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40...
  • Page 6: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm MS-30SV- INDOOR UNIT Installation plate Indoor unit 1068 414.5 414.5 Wall hole [ 75 1100 Installation plate Liquid line [ 9.52- 0.5m Gas line [ 16-0.43m Insulation [ 50 O.D Air in [ 32 I.D Drain hose [ 16 Air out (Connected part O.D)
  • Page 7 MU-30SV- Unit: mm OUTDOOR UNIT Outdoor Unit-Necessary surrounding clearance Air intake Note:Allow adequate upper clearance Air intake Front opening Air outlet Terminal block for power line Terminal block for indoor and outdoor unit connection Service space Outlet guide installation hole Handle for moving Service panel Handle for moving...
  • Page 8: Wiring Diagram

    WIRING DIAGRAM MS-30SV- MODEL WIRING DIAGRAM INDOOR UNIT RT13 TO OUTDOOR UNIT HIC1 RT12 CONNECTING CN112 CN201 NR11 TRANS SR141 240V~ TAB12 CN211 RT11 ELECTRONIC CONTROL P.C. BOARD DISPLAY RECEIVER P.C.BOARD P.C.BOARD REMOTE CONTROLLER SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR FAN CAPACITOR VANE MOTOR(VERTICAL) SR141...
  • Page 9 MU-30SV- MODEL WIRING DIAGRAM OUTDOOR UNIT RT62 RT63 6 5 4 3 CIRCUIT BREAKER CN662 CN724 CN711 SR62 SR61 NR61 DEICER P.C. BOARD 240V~ LD80 LD82 LD81 LD83 NOISE FILTER P.C. BOARD NAME SYMBOL SYMBOL NAME SYMBOL NAME CURRENT TRANS OUTDOOR FAN MOTOR (INNER PROTECTOR) TERMINAL BLOCK COMPRESSOR CAPACITOR...
  • Page 10: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit:mm MS-30SV - MU-30SV - INDOOR UNIT OUTDOOR UNIT Refrigerant pipe [15.88 (Option) (with heat insulator) Strainer Stop valve Indoor coil Indoor thermistor (with service port) heat Outdoor RT12(main) exchanger heat Flared connection Discharge exchanger thermistor RT62 Indoor coil thermistor RT13(sub)
  • Page 11: Performance Curves

    PERFORMANCE CURVES MS-30SV - The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed. The following information has been pro- vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
  • Page 12 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation 1 1 Both indoor and outdoor unit are under the same temperature/humidity condition. Relative humidity(%) Dry-bulb temperature 2 2 Air flow should be set at MAX. MU-30SV - MU-30SV - (MPa [Gauge]) 35(:) 18 20 30 32...
  • Page 13 PERFORMANCE DATA COOL operation MS-30SV - : MU-30SV - CAPACITY : 8.4(KW) SHF : 0.63 INPUT : 3560(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 9.87 4.44 0.45 2848 9.45 4.25 0.45 2990 9.07 4.08 0.45...
  • Page 14 PERFORMANCE DATA COOL operation MS-30SV - : MU-30SV - CAPACITY : 8.4(KW) SHF : 0.63 INPUT : 3560(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 8.23 3.70 0.45 3489 7.56 3.40 0.45 3702 7.27 3.27 0.45...
  • Page 15: Microprocessor Control

    MICROPROCESSOR CONTROL MS-30SV - WIRELESS REMOTE CONTROLLER Once the operation mode are set, the same operation mode can be repeated by simply turning the OPERATE/STOP(ON/OFF) button ON. Signal transmitting section Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to protect system from overload and compressor will not restart for Operation display section 3 minutes.
  • Page 16 (4) The initial set temperature is decided by the initial room temperature. Model Initial room temperature Initial set temperature 26: or more COOL mode of "I FEEL CONTROL" 25: to 26: Initial room temperature minus 2: DRY mode of more than 13:, less than 25: Initial room temperature minus 2: "I FEEL CONTROL"...
  • Page 17 Operation chart Example Compressor Outdoor fan (continuously at set speed) Indoor fan 3. Outdoor fan control Outdoor fan speed is controlled according to the temperature of ambient temperature thermistor RT63. Outdoor fan Lo operation : When the outside temperature decreases to 23°C or less. Until when the outside temperature goes to 27°C or more.
  • Page 18 3. Coil frost prevention The operation is as same as coil frost prevention during COOL mode of “I FEEL CONTROL”. Indoor fan operates at the set speed and the compressor stops for 5 minutes, because protection (Coil frost prevention) has the priority.
  • Page 19 8-6. AUTO VANE OPERATION 1. Horizontal vane (1) Vane motor drive This model is equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode changes as follows by pressing the VANE button.
  • Page 20 (8) ECONO COOL ( ) operation (ECONOmical operation) When the ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2°C higher than that in COOL mode. Also the horizontal vane swings in various cycle according to the temperature of indoor heat exchanger(Tp (w 1) SWING operation makes you feel cooler than set temperature.
  • Page 21 (3) Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle. Confirming of standard position is performed in case of follows. (a) When the OPERATE/STOP(ON/OFF) button is pressed (POWER ON/OFF). (b) When the operation mode is changed.
  • Page 22 8-8. EMERGENCY-TEST OPERATION When the remote controller is missing, has failed or the batteries run down, use the EMERGENCY OPERATION switch on the front of the indoor unit. The unit will start and the OPERATION INDICATOR lamp will light. The first 30 minutes of operation is the test run operation. This operation is for servicing. The indoor fan speed runs at Hi notch and the system is in continuous operation.
  • Page 23 (1) LEV opening correction by discharge temperature The LEV opening is corrected according to the temperature difference between target discharge temperature (Tb) and actual discharge temperature (Ta). 1 The LEV correction is used properly for two kinds according to the LEV opening status at operation off. Opening immediately before having stopped last time Rank 100 pulse or less...
  • Page 24: Service Functions

    (2) LEV time chart Remote Opening Opening Remote controller Power ON completely completely Thermostat controller Operation Operation Operation Remote controller Standard opening Standard opening Thermostat Standard opening Opening at starting Opening at starting Opening at starting Opening in stop Opening in stop Positioning Positioning Time...
  • Page 25 How to modify the remote controller P.C. board Remove batteries before modification. The board has a print as shown below : NOTE : For remodelling, take out the bat- teries and push the OPERATE/STOP(ON/OFF)button twice or 3 times at first. After finish remodelling, put back the batteries then push the RESET button.
  • Page 26: Troubleshooting

    NOTE: • The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller . • If main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can- celled.
  • Page 27 10-2. Instruction of troubleshooting Start Indoor unit Indoor unit OPERATION INDICATOR operates. doesn't receive lamp on the indoor unit is Outdoor unit the signal from flashing on and off. doesn't remote controller. operate. Outdoor unit Indoor unit Outdoor unit Indoor unit doesn't Outdoor unit doesn't operate,...
  • Page 28 1. Troubleshooting check table flashing · Flashing of the OPERATION INDICATOR lamp (on the left-hand side) indicates possible abnormalities. Operation Indicator · The OPERATION INDICATOR lamp (on the left-hand side) is lighting during normal operation. NOTE: Before taking measures, make sure that the symptom reappears, for accurate troubleshooting. Self check table Abnormal Operation indicator lamp...
  • Page 29 MS-30SV - 2. Trouble criterion of main parts Part name Check method and criterion Figure Room temperature Measure the resistance with a tester. thermistor(RT11) (Part temperature 10˚C ~ 30˚C) Normal Abnormal Indoor coil thermistor (RT12(main), RT13(sub)) Open or short circuit 8 k"...
  • Page 30 Check of indoor fan motor Indoor fan does not operate. Turn OFF the power supply. Check connector CN211 visually. Are lead wires connected? Is soldering point of the connector correctly soldered? Resolder it. Reconnect the lead wires. Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board. Measure resistance between lead wires No.1 and No.4 and then No.1 and No.3.
  • Page 31 Check of indoor electronic control P.C. board Unit does not operate with the remote controller. OPERATION INDICATOR lamp does not light up either, with the EMERGENCY OPERATION switch ON. Check both “parts side” Turn OFF the power supply. and “pattern side” of indoor Remove indoor fan motor connector CN211 and vane motor connector CN151 electronic control P.C.
  • Page 32 Check of outdoor unit Compressor and / or outdoor fan does not operate. Turn ON the power supply. Is there 240V AC to Check the outdoor power supply between on the and connection of wiring. outdoor terminal block Compressor does not operate. Check the deicer P.C.
  • Page 33 Check of outdoor unit Compressor and / or outdoor fan does not stop. 1 Turn OFF the power supply. 2 After 30 seconds, turn ON the power supply again. 3 Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 4 Operate the unit for 1 minute or more and stop it by pressing the EMERGENCY OPERATION switch again.
  • Page 34 How to check mis-wiring Outdoor unit does not work. w Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self -check to be displayed in 3 seconds. Start • Turn ON the power supply. • Press once EMERGENCY OPERATION switch. After 3 minutes, mis-wiring is indicated (0.5-second ON, 0.5-second OFF) on OPERATION INDICATOR...
  • Page 35 Check of LEV (Expansion valve) Cooling does not operate. 1 During pressing OPERATION SELECT button on remote controller, press RESET button. 2 First, release RESET button. 1 During pressing OPERATION SELECT (Confirm all displays of remote controller.) button on remote controller, press 3 Then release OPERATION SELECT button.
  • Page 36 Check of compressor Compressor does not operate. Turn ON the power supply. Check the power supply voltage. Check the power supply Is there 240V AC between L-N on and connection of wiring. the outdoor terminal block? Check the deicer P.C. board. Refer to page 38. Is 0V between R614 and J202 on the Replace the deicer P.C.
  • Page 37 TEST POINT DIAGRAM AND VOLTAGE MS-30SV - Indoor electronic control P.C. board Fan motor power supply Power supply input 240V AC 5V DC Fuse (F11) 250V AC 3.15A Room temperature thermistor(RT11) Indoor coil thermistor(RT12(main)) Indoor coil thermistor(RT13(sub)) Emergency operation switch Timer short mode point (JPS, JPG) (Refer to page 24.)
  • Page 38 MU-30SV - Outdoor deicer P.C. board Ambient temperature thermistor (RT63) Discharge temperature thermistor(RT62) -20 -10 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 110 120 Temperature(:) Temperature(:) CN662 1-2 CN662 3-4 Discharge tem- Ambient tempera- Fan motor perature ther-...
  • Page 39 MU-30SV - Noise filter P.C. board LD81 Power supply input 240V AC LD80 LD83 LD82 Power supply output 240V AC MU-30SV - Soft start relay Terminal 1 Terminal 2...
  • Page 40: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <"Terminal with lock mechanism" Detaching points> In case of terminal with lock mechanism, detach the terminal as shown below. There are two types ( Refer to (1) and (2)) of the terminal with lock mechanism. The terminal with no lock mechanism can be removed by pulling it out. Check the shape of the terminal and work.
  • Page 41 OPERATING PROCEDURE PHOTOS Photo 3 3. Removing the electrical box Screws of the ground wire (1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (Refer to 2) (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronic control P.C.
  • Page 42 11-2. MU-30SV - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Screws of the top panel Photo 1 1. Removing the cabinet (1) Remove the screws of the top panel and the top panel. Top panel (2) Remove the screw of the service panel. To remove the service panel, pull it down toward you and unhook the catches on the both sides.
  • Page 43 OPERATING PROCEDURE PHOTOS Photo 5 4. Removing the heat exchanger and compressor (1) Remove the screws of the rear panel. Remove the screws of the valve bed and the valve bed. (The valve bed is Screws fixed by the catches on the right and left sides. Lift it to remove.) Open the rear panel to the rear to remove.
  • Page 44: Parts List

    PARTS LIST MS-30SV - (WH) 12-1. INDOOR UNIT STRUCTURAL PARTS 12-2. INDOOR UNIT HEAT EXCHANGER CATCH SCREW 12-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part Name Remarks MS-30SV- Diagram...
  • Page 45: Electrical Parts

    MS-30SV - (WH) 12-4. ACCESSORY AND 12-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER PART ELECTRICAL PARTS SLEEVE BEARING ROOM TEMPERATURE THERMISTOR 20 21 VARISTOR FUSE 12-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring...
  • Page 46 MU-30SV - 12-5. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS...
  • Page 47 MU-30SV - 12-5. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part No. Part Name Remarks in Wiring MU-30SV- Diagram E02 214 232 CABINET E02 214 297 TOP PANEL E02 527 521 FAN GUARD...
  • Page 48: Optional Parts

    DEODORIZING FILTER and AIR CLEANING FILTER can be attached on either side. HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8310 TELEX J24532 CABLE MELCO TOKYO C C Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD New publication, effective Jul. 2000 Specifications subject to change without notice.

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Mu-30sv-a1