TECHNICAL CHANGES INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT • This room air conditioner adopts R410A of HFC refrigerant which never destroys the ozone layer. Pay attention following points. 1 As R410A working pressure is 1.6 times higher than that of R22 of previous refrigerant, dedicated tools and piping are required.
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Conversion chart of refrigerant temperature and pressure (MPa [Gauge]) R410A NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system). The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f f [Gauge]) -0.5 -30 -20 -10 1.Tools dedicated for the air conditioner with R410A refrigerant The following tools are required for R410A refrigerant.
Thus, charge the refrigerant slowly. Outdoor unit Gas cylinder Valve Refrigerant gas cylinder for R410A with siphon Liquid Electronic scale for refrigerant charging PART NAMES AND FUNCTIONS MSZ-A09RV- MSZ-A12RV- INDOOR UNIT Grille Air cleaning filter(white bellows Air inlet type) Deodorizing filter...
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MUZ-A09RV- MUZ-A12RV- OUTDOOR UNIT Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MSZ-A09RV- MSZ-A12RV- REMOTE CONTROLLER Signal transmitting section Operation display section CLOCK 6 00 1 1 00 OPERATE /STOP (ON /OFF)button ON/OFF COOL WARM OPERATION SELECT button...
SPECIFICATION Indoor model MSZ-A09RV - MSZ-A12RV - Function Cooling Heating Cooling Heating Single phase Single phase Power supply 220-240V,50Hz 220-240V,50Hz Capacity 2.6 (0.9-3.3) 3.6 (0.9-4.8) 3.4 (0.9-3.8) 4.8 (0.9-6.1) K /h Air flow(High) Capacity Dehumidification — — Power outlet Running current 3.67-3.37...
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Specifications and rating conditions of main electric parts INDOOR UNIT MSZ-A09RV Model Item MSZ-A12RV 1.5+ 440V Indoor fan capacitor MP24GA 12V 300" Vane motor ERZV10D471 Varistor (NR11) S201DH1Y Semiconductor relay Terminal block JM1aN-ZTMP-DC12V Relay (compressor) (52C) 93.5:5A 250V Terminal block thermal Fuse...
OUTLINES AND DIMENSIONS MSZ-A09RV- MSZ-A12RV- Installation plate INDOOR UNIT Indoor unit 81.5 116.5 Wall hole [65 Installation plate Liquid line [6.35-0.5m Gas line [9.52-0.43m Air in Insulation [37 O.D [21 I.D Drain hose [16 (Connected part O.D) 17.5 Insulation [28...
PERFORMANCE CURVES MSZ-A09RV - MUZ-A12RV - MSZ-A12RV - MUZ-A12RV - 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 provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
Cooling capacity MUZ-A09RV - MUZ-A09RV - Correction of Cooling capacity Correction of total input 150(Hz) 150(Hz) The operational frequency of compressor The operational frequency of compressor MUZ-A12RV - MUZ-A12RV - Correction of Cooling capacity Correction of total input 150(Hz) 150(Hz) The operational frequency of compressor The operational frequency of compressor...
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Heating capacity NOTE:The above curves are for the heating operation without any frost. 27.1 30.4 25.1 28.1 23.0 25.8 20.9 23.4 18.8 21.1 16.7 18.7 14.6 16.4 12.5 14.1 MUZ-A09RV - MUZ-A09RV - Correction of Heating capacity Correction of total input 150(Hz) 150(Hz) The operational frequency of compressor...
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OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT How to operate with fixed operational frequency of the compressor. 1. Press the EMERGENCY OPERATION switch on the front of the indoor unit , and select either the COOL mode or the HEAT mode before starting to operate the air conditioner. 2.
MICROPROCESSOR CONTROL MSZ-A09RV- MUZ-A09RV- MSZ-A12RV- MUZ-A12RV- Once the controls are set, the same operation mode can be repeated by simply turning the OPERATE/STOP(ON/OFF) button 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 3 minutes.
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9-1. “I FEEL CONTROL” ( ) OPERATION 1. Press OPERATE/STOP(ON/OFF) button on the remote controller. POWER MONITOR lamp of the indoor unit will turn on with a beep tone. 2. Press OPERATION SELECT button to set “I FEEL CONTROL”( ) Then a beep tone is heard. 3.
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5. TEMPERATURE buttons In “I FEEL CONTROL” (h)mode, set temperature is decided by the microprocessor based on the room temperature. In addition, set temperature is controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm. Pressing the TOO WARM or TOO COOL button emits a beep tone.
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Defrosting in DRY mode The operational frequency of the compressor is controlled based on the temperature of the indoor coil thermistor (RT12). Temperature of indoor coil thermistor:RT12 Operation frequency approx. 8°C or above normal approx. 6°C to 8°C fixed approx. 3°C to 6°C lower at the rate of 3Hz/min lower at the rate of 6Hz/min approx.
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2. High pressure protection In HEAT mode and manually-operated HEAT mode, the indoor coil thermistor detects the temperature at the indoor heat exchanger and controls the compressor rotational frequency to prevent the condensing pressure from increasing excessive- 3. Overload starting When the room temperature thermistor reads 18°C or above, the compressor runs with its maximum frequency regulated for 3 minutes after the start-up.
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9-2. COOL ( ) OPERATION (1) Press OPERATE/STOP(ON/OFF) button.POWER MONITOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with the OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button)to select the desired temperature. The setting range is 16 ~ 31°C Indoor fan continues to operate regardless of thermostat’s OFF-ON.
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9-6. AUTO VANE OPERATION 1. Vane motor drive These models are 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.
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7 Horizontal AIR FLOW ( The vertical vane angle changes as follows by pressing the SWING button. Press the SWING button. The vertical vanes begin moving. When the vertical vanes move to the desired position, press the SWING button again. The vertical vanes stop moving.
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9-7. TIMER OPERATION 1. How to set the timer (1) Press OPERATE/STOP(ON/OFF) button to start the air conditioner. (2) Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK SET button.
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9-8. EMERGENCY-TEST OPERATION In case of test run operation or emergency operation, use the EMERGENCY OPERATION switch on the front of the indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of remote controller run down.
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Maximum Minimum Rating Maximum frequency frequency frequency frequency frequency frequency MSZ-A09RV 22/27 MSZ-A12RV 22/27 w The maximum frequency in COOL mode is limited according to operation hours, as shown below. Maximum frequency frequency Rating or under-rating frequency Time (2) Frequency change speed...
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9-11 .Electronic expansion valve control (LEV control) (1)Outline of LEV control The LEV basic control is comprised of setting LEV opening degree to the standard opening degrees set for each opera- tional frequency of the compressor. However, when any change in indoor/outdoor temperatures or other factors cause air conditioning load fluctuation, the LEV control also works to correct LEV opening degree based on discharge temperature (Shell temperature) of the compressor, developing the unit’s performance.
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(3) Time chart Air conditioner ON Air conditioner OFF Positioning (thirmostat off) Opening degree is corrected according to discharge Standard Commanded temperature opening to open degree Time 15 min. OFF Time (4) Control data (a) Reference value of target discharge temperature (Cooling :/Heating :) 58/49...
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9-12.Outdoor fan motor control The AC fan motor turns ON/OFF, interlocking with the compressor. [ON] The AC fan motor turns on 5 seconds before the compressor starts up. [OFF] The AC fan motor turns off 15 seconds after the compressor stops running. 5 sec.
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9-14. Indoor fan motor control The detected rotational frequency of the fan motor is feed backed to the microprocessor and then the microprocessor works to keep the rotational frequency at a fixed value against load fluctuation. (1) Circuit block diagram SSR output every 100Hz pulse output AC motor...
SERVICE FUNCTIONS MSZ-A09RV - MUZ-A09RV - MSZ-A12RV - MUZ-A12RV - 10-1. CHANGE IN DEFROST SETTING <JP7> When the JP7 wire of the outdoor electronic control P.C. board is cut, the defrost temperature will be changed. (Refer to page 55.) Jumper wire Change point Deforst finish temperature changes from 13: to 15:.
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10-4. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C.board. The “AUTO RESTART FUNCTION” sets to work the moment the power has restored after power failure, then, the unit will restart automatically.
TROUBLESHOOTING MSZ-A09RV - MUZ-A09RV - MSZ-A12RV - MUZ-A12RV - 11-1. Cautions on troubleshooting 1. Before troubleshooting, check the following: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the following during servicing.
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11-2. Troubleshooting procedure The following procedure facilitates identifying defective points. The abnormalities in can be located in the Troubleshooting check table on page 42~43. Operation start 3 time flash 2.5 seconds OFF Indoor unit dose Indoor unit does not respond to Power monitor not respond to remote controller.
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1. Troubleshooting check table (Indoor unit troubleshooting check table) MSZ-A09RV - MSZ-A12RV - flash · Flashing of the POWER MONITOR lamp indicates possible abnormalities. · The POWER MONITOR lamp is lighting during normal operation. Symptom POWER MONITOR lamp Abnormal point...
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(Outdoor LED indication table) <Outdoor electronic control P.C. board> MUZ-A09RV - Flashing MUZ-A12RV - NOTE 1. The location of LED is illustrated at the right figure. 2. LED lights up during normal operation. Symptom LED indication Abnormal point Detection method Checkpoint Converter power When the converter protective suspension within 1 minute after...
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2. Checking mis-wiring and serial signal error. Outdoor unit does not operate. When the POWER MONITOR lamp (on the left-hand side) flashes on and off continuously or only once. 1. Turn OFF power supply. 2. Turn ON power supply. 3. Press the EMERGENCY OPERATION switch. 2.5 seconds OFF Is the self-check function of indoor unit indicated when relay 52C turns ON 3min.
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3. Trouble shooting procedure of main parts (Simple check method of main parts) MSZ-A09RV - MUZ-A09RV - MSZ-A12RV - MUZ-A12RV - Part name Checking method and criterion Disconnect the connector and measure the resistance with a tester. Room temperature thermistor(RT11)
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Part name Checking method and criterion Measure the resistance between the terminals with a tester. Outdoor fan motor(MF61) (Winding temperature : -10:~40:) Terminal Normal Abnormal WHT-BLK 173.7'~212.6' BLK-RED 277.8'~339.9' Open or short circuit YLW-BLK 11.4'~14.1' Measure the resistance between the RED terminal and the other ones. Horizontal vane (Winding temperature : 20:~30:) motor(MV1)
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(How to check inverter/compressor) Start Disconnect the connector between compressor and IPM. Check voltage See A 'Check of open phase.' between terminals. Are voltages See B 'Check of IPM.' Check resistance of IPM. balanced? Is resistance Outdoor electronic control infinite? P.C.
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Check of compressor See D 'Check of compressor winding'. Check resistance of compressor. Is resistance 1~several " at -10: Compressor is short or Replace compressor. ~ 40: of winding open. temperature? Check compressor operation time. See E ' Check of compressor operation time,' Compressor is layer short Replace compressor.
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(How to check main parts) Check of indoor fan motor Indoor fan does not operate. Replace indoor Are lead wires fan motor. disconnected? Turn off power Re-connect Disconnect lead wires from supply and check lead wires. CN 211 on indoor electronic connector CN control P.C.
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Check of indoor electronic P.C. board The unit does not operate with the remote controller. The POWER MONITOR 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 Indoor electronic Remove indoor fan motor connector CN211 and vane motor connector CN151 Thermal fuse connector...
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Check of R.V. coil Heating operation works when cooling is expected. • If the connector CN 913 is connected or the R.V. coil is open, the voltage occurs between the terminals even when the control is OFF. Disconnect connector between compressor and IPM.
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(How to check power supply and others) Check of power supply · Press emergency operation switch again to check if 52C Inverter does not work. relay works. · Re-connect connecting wire of indoor and outdoor unit. Disconnect connector between compressor and IPM. ·...
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Check of rush current limiting circuit Outdoor unit does not operate or stops immediately due to overcurrent. NOTE : When the current limiting resistor is open, the rush current limiting relay Start may not be working properly. There fore confirm the limiting resistor works properly after replacing it.
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TEST POINT DIAGRAM AND VOLTAGE MSZ-A09RV - MSZ-A12RV - Indoor electronic control P.C. board Varistor (NR11) Fuse 250V AC 3.15A Fan motor power supply Power supply input 220- 240V AC Room temperature 12V DC thermistor (RT11) Timer short mode point...
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Outdoor electronic control P.C.board MUZ-A09RV - MUZ-A12RV - 5V DC 370V DC LED monitor lamp 15V DC (C62) Power supply 220-240V AC zero crossing 12V DC signal 220- BACK 240V AC (CN726) Connector for indoor/out- door commu- nication connector (CN724) FRONT Defrost Discharge...
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MUZ-A09RV - MUZ-A12RV - Noise filter P.C board BACK FRONT Relay P.C board 220-240V AC FRONT BACK Outdoor fan motor R.V. coil Power supply zero crossing 220-240V AC 220-240V AC signal 220-240V AC (CN911)
2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 12-1. MSZ-A09RV - MSZ-A12RV - INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the front panel Front panel (1) Remove the screw caps of the front panel.
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OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Photo 3 (1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211) and the vane motor connector (CN151) on the electronic control P.C.
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12-2. MUZ-A09RV - MUZ-A12RV - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Screws Photo 1 (1) Remove the screws fixing the top panel and top panel. (2) Remove the screws fixing the service panel. (3) Pull down the service panel and remove it from the cabinet. (4) Remove the screws fixing the cabinet.
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OPERATING PROCEDURE PHOTOS 6. Removing the outdoor fan motor Photo 5 (1) Remove the top panel, the service panel and the cabinet. (Refer to 1) Lead clamps (2) Disconnect the connector remove the clamp of fan motor Set screws for lead wire.
PARTS LIST MSZ-A09RV - (WH) MSZ-A12RV - (WH) 13-1. INDOOR UNIT STRUCTURAL PARTS 13-2. INDOOR UNIT HEAT EXCHANGER SCREW CATCH 13-1. INDOOR UNIT STRUCTURAL PARTS Symbol Q'ty/unit in Wiring Part No. Part Name Remarks MSZ-A09RV- MSZ-A12RV- (WH) (WH) Diagram E02 408 970...
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MSZ-A09RV - (WH) MSZ-A12RV - (WH) 13-4. ACCESSORY AND 13-3. INDOOR UNIT ELECTRICAL PARTS REMOTE CONTROLLER PARTS SLEEVE BEARING ROOM TEMPERATURE THERMISTOR FUSE VARISTOR 13-3. INDOOR UNIT ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration.
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13-5. OUTDOOR UNIT STRUCTURAL PARTS MUZ-A09RV - MUZ-A12RV - Part numbers that are circled are not shown in the illustration. Symbol Q'ty/unit in Wiring Part No. Part Name Remarks MUZ-A09RV- MUZ-A12RV- Diagram M21 75K 297 TOP PANEL T2W E56 515 MOTOR SUPPORT T2W E57 630 OUTDOOR HEAT EXCHANGER...
13-6. OUTDOOR UNIT ELECTRICAL PARTS MUZ-A09RV - MUZ-A12RV - Part number that is circled is not shown in the illustration. Symbol Q'ty/unit in Wiring Part No. Part Name Remarks MUZ-A09RV- MUZ-A12RV- Diagram M21 90A 308 FIN TEMPERATURE THERMISTOR RT64 REACTOR T2W E56 331 T2W E56 424 NOISE FILTER P.C BOARD...
DO NOT reuse AIR CLEANING FILTER even if it is washed. DO NOT remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSZ-A09RV - MAC-1300FT MSZ-A12RV - 13-9. DEODORIZING FILTER DEODORIZING FILTER removes ammonia and hydrogen sulfide emitted from tobacco, and odors of pets.
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HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 1999 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD New publication, effective May 2002 Distributed in May 2002. No.OB230 REVISED EDITION-A Specifications subject to change without notice. Distributed in Mar. 1999. MEE No. OB230 244...