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Mitsubishi Electric MSZ-A09NA Service Manual

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See also: Installation Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MSZ-A09NA
MSZ-A12NA
MSZ-A15NA
MSZ-A17NA
MSZ-A24NA
MSY-A15NA
MSY-A17NA
MSY-A24NA
MSZ-A09NA MSY-A15NA
MSZ-A12NA MSY-A17NA
MSZ-A15NA
MSZ-A17NA
NOTE:
This service manual describes technical data of the intdoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the PARTS
LIST (RoHS compliant).
Outdoor unit service manual
MUZ-A·NA Series (OB451)
MXZ-A·NA Series (OB444)
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································4
4. OUTLINES AND DIMENSIONS ·························6
5. WIRING DIAGRAM ············································8
6. REFRIGERANT SYSTEM DIAGRAM ················9
7. SERVICE FUNCTIONS ····································10
8. TROUBLESHOOTING······································11
9. DISASSEMBLY INSTRUCTIONS ····················25
10. PARTS LIST······················································30
10-1. PARTS LIST·············································30
10-2. RoHS PARTS LIST ··································36
11. MICROPROCESSOR CONTROL·····················42
No. OB450

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Summary of Contents for Mitsubishi Electric MSZ-A09NA

  • Page 1: Table Of Contents

    2. PART NAMES AND FUNCTIONS······················3 3. SPECIFICATION·················································4 4. OUTLINES AND DIMENSIONS ·························6 5. WIRING DIAGRAM ············································8 6. REFRIGERANT SYSTEM DIAGRAM ················9 7. SERVICE FUNCTIONS ····································10 MSZ-A09NA MSY-A15NA 8. TROUBLESHOOTING······································11 MSZ-A12NA MSY-A17NA 9. DISASSEMBLY INSTRUCTIONS ····················25 MSZ-A15NA 10. PARTS LIST······················································30 MSZ-A17NA 10-1.

  • Page 2: Technical Changes

    TECHNICAL CHANGES MSZ09UN MSZ-A09NA MSZ12UN MSZ-A12NA MSH15TN MSZ-A15NA MSH17TN MSZ-A17NA MSH24WN MSZ-A24NA MS15TN MSY-A15NA MS17TN MSY-A17NA MS24WN MSY-A24NA 1.Control method between indoor and outdoor has been changed. 2.Indoor fan motor has been changed. 3.Signal of remote controller has been changed. (It is not available for conventional models.)

  • Page 3: Part Names And Functions

    MSZ-A24NA MSY-A24NA Operation indicator lamp Emergency operation switch Remote control receiving section ACCESSORIES MSZ-A09NA MSZ-A17NA MSZ-A24NA MSZ-A12NA MSY-A15NA MSY-A24NA MSZ-A15NA MSY-A17NA Installation plate Installation plate fixing screw 4 o 25 mm Remote controller holder Fixing screw for 3 o 3.5 o 1.6 mm (Black)

  • Page 4: Specification

    SPECIFICATION Model MSZ-A09NA MSZ-A12NA Item INDOOR UNIT MODEL MSZ-A09NA MSZ-A12NA External finish White Power supply V, phase, Hz 208/230, 1, 60 Max. fuse size (time delay)/ Disconnect switch Min. circuit ampacity Fan motor F.L.A 0.76 0.76 307-222-159 353-240-159 HEAT Dry Airflow Low—Med.—High...
  • Page 5 3-1. OPERATING RANGE (1) POWER SUPPLY Model Rated voltage Guaranteed Voltage MSZ-A09NA MSY-A15NA Min. 198V 208V 230V Max. 253V MSZ-A12NA MSY-A17NA MSZ-A15NA MSY-A24NA 208/230V 1phase 60Hz MSZ-A17NA MSZ-A24NA (2) OPERATION Intake air Indoor Outdoor temperature Function DB (˚F) WB (˚F) DB (˚F)

  • Page 6: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MSZ-A09NA MSY-A15NA Unit : inch MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA 7/16x13/16 Oblong hole 7/16x1 Oblong hole Installation plate 2-3/16 8-7/8 8-7/8 2-3/16 hole 30-11/16 6-1/8 6-1/8 1-3/4 2-3/4 2-3/16 13-3/16 12-5/8 Indoor unit Air in Wall hole [2-9/16...
  • Page 7 MSZ-A24NA Unit : inch MSY-A24NA Installation plate Indoor unit 3-7/8 6-13/16 42-1/16 3-7/8 16-5/16 16-5/16 6-13/16 Wall hole [3 10-1/4 3/16 43-5/16 Air in Installation plate Liquid line [1/4 19-11/16 Gas line [5/8 16-15/16 Insulation [1-15/16 O.D [1-1/4 I.D 2-3/16 31-1/8 9-15/16 Drain hose [5/8...

  • Page 8: Wiring Diagram

    WIRING DIAGRAM MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A24NA...

  • Page 9: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MSZ-A09NA MSZ-A15NA MSY-A15NA Unit:inch MSZ-A12NA MSZ-A17NA MSY-A17NA Refrigerant pipe [1/2 Refrigerant pipe [3/8 (with heat insulator) (with heat insulator) Indoor coil Indoor coil Indoor thermistor Indoor thermistor heat RT12(main) heat RT12(main) exchanger Flared connection exchanger Distributor Flared connection...

  • Page 10: Service Functions

    SERVICE FUNCTIONS MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA MSY-A17NA MSY-A24NA 7-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board. The time will be shortened as follows. (Refer to 8-7.)

  • Page 11: Troubleshooting

    Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one. TROUBLESHOOTING MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA...
  • Page 12 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. 2) Before servicing check that the connector and terminal are connected properly.
  • Page 13 8-2. Failure mode recall function Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (8-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.
  • Page 14 2. Indoor unit failure mode table Left lamp of OPERATION Abnormal point Condition Correspondence INDICATOR lamp (Failure mode) Not lighted Normal – – When the room temperature thermistor short Room temperature Refer to the characteristics of the room 1-time flash or open circuit is detected every 8 thermistor temperature thermistor (8-7.).
  • Page 15 8-3. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. OPERATION INDICATOR operates. doesn't receive Outdoor unit doesn't lamp on the indoor unit is Outdoor unit the signal from operate normally. flashing on and off. doesn't remote controller. operate.
  • Page 16 8-4. Troubleshooting check table Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and the following detection method has detected an abnormality (the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing.
  • Page 17 2.5-second OFF setting first has the priority. operate. 8-5. Trouble criterion of main parts MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA MSY-A17NA MSY-A24NA Part name Check method and criterion Figure Room temperature Measure the resistance with a tester.
  • Page 18 8-6. Troubleshooting flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan does not operate. Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan doesn't operate. Turn OFF the power supply. Pay careful attention to the high voltage on the fan motor connector CN211.
  • Page 19 Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller. Check of remote controller and receiver P.C. board wCheck if the remote controller is exclusive for this air conditioner. Switch ON the remote controller. Is LCD display on the the remote Replace the batteries.
  • Page 20 The unit does not operate with the remote controller. Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch. Check of indoor electronic control P.C. board and indoor fan motor Turn OFF the power supply. Measure the resistance between CN211 3 Short/open circuit: Remove indoor fan motor connector CN211 and and 4 of the indoor fan motor connector.
  • Page 21 • When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. • When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. How to check mis-wiring and serial signal error Turn OFF the power supply.
  • Page 22 Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the Extend the distance between antennas and the indoor the antennas and the indoor unit within 9.91ft., or is the unit, and/or the antennas and distance between the the outdoor unit.
  • Page 23 8-7. Test point diagram and voltage MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA Indoor electronic control P.C. board Power supply input Varistor (NR11) 208/230V AC Fuse(F11) Indoor fan motor (CN211) 1294/325V DC 3(-) Fiducial terminal of cathode side on measur- ing high-voltage DC...
  • Page 24 MSZ-A24NA MSY-24NA Indoor electronic control P.C. board Release of Auto restart Power supply input function Varistor (NR11) 208/230V AC Fuse(F11) Solder the Jumper wire to JR07. (Refer to 6-3.) Indoor fan motor (CN211) 1294/325V DC 3(-) Fiducial terminal of cathode side on measur- ing high-voltage DC Display 415V DC...

  • Page 25: Disassembly Instructions

    2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 9-1. MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA OPERATING PROCEDURE PHOTOS 1. Removing the panel Photo 1 (1) Remove the horizontal vane. (2) Remove the screw caps of the panel.
  • Page 26 OPERATING PROCEDURE PHOTOS 2. Removing the electronic control P.C. board, the Photo 3 power monitor receiver P.C. board, SW P.C. board and the terminal block (1) Remove the horizontal vane, the panel (Refer to 1.) and the corner box. (2) Remove the screw of the conduit cover, and conduit cover. (See Photo 2.) (3) Remove the indoor/outdoor connecting wire.
  • Page 27 OPERATING PROCEDURE PHOTOS Photo 6 4. Removing the horizontal vane motor unit (1) Remove the horizontal vane and the panel. (Refer to 1.) (2) Remove the screws of the horizontal vane motor unit, and pull out the horizontal vane motor unit. (See Photo 6.) Screws of the (3) Disconnect the connector from the horizontal vane motor horizontal vane...
  • Page 28 9-2.MSZ-A24NA MSY-A24NA OPERATING PROCEDURE PHOTOS 1. Removing the front panel Photo 1 Front panel (1) Remove the screw caps of the front panel. Remove the screws. (2) Pull the panel down to your side slightly and unhook the catches at the top. Corner box Screws Photo 2...
  • Page 29 OPERATING PROCEDURE PHOTOS Photo 4 4. Removing the vane motor (1) Remove the front panel. (Refer to 1.) Vane motors Screws (2) Remove the electrical cover. (Refer to 2.) of the (3) Remove the lead wire of vane motor.(Refer to 3.) vane (4) Remove the R.L.

  • Page 30: Parts List

    PARTS LIST 10-1. PARTS LIST (non-RoHS compliant) MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA 1. INDOOR UNIT STRUCTURAL PARTS 2. ACCESSORY AND REMOTE CONTROLLER (See 10-5.) 1. INDOOR UNIT STRUCTURAL PARTS Q'ty/unit Symbol MSZ- MSY- Part No. Part name in Wiring...
  • Page 31 MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Q'ty/unit Symbol Part No. in Wiring MSZ- MSY- Remarks Part name Diagram A09NA A12NA A15NA A17NA A15NA A17NA E02 751 509 BEARING MOUNT E02 001 504...
  • Page 32 MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 4. INDOOR UNIT HEAT EXCHANGER Q'ty/unit Symbol in Wiring MSZ- MSY- Part No. Part name Remarks Diagram A09NA A12NA A15NA A17NA A15NA A17NA E02 A54 620 INDOOR HEAT EXCHANGER E02 A56 620 INDOOR HEAT EXCHANGER...
  • Page 33 MSZ-A24NA MSY-A24NA 6. INDOOR UNIT STRUCTURAL PARTS 7. INDOOR UNIT HEAT EXCHANGER (See 10-10.) 6. 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 MSZ-A24NA MSY-A24NA Diagram E02 527 970...

  • Page 34: Symbol Q'ty/Unit

    MSZ-A24NA MSY-A24NA 9. ACCESSORY AND 8. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part Name Remarks MSZ-A24NA...

  • Page 35: Air Cleaning Filter

    10. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME FILTER) AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. Normal life of AIR CLEANING FILTER is 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months.

  • Page 36: Rohs Parts List

    10-2. RoHS PARTS LIST (RoHS compliant) MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA 1. INDOOR UNIT STRUCTURAL PARTS 2. ACCESSORY AND REMOTE CONTROLLER (See 10-5.) 1. INDOOR UNIT STRUCTURAL PARTS Q'ty/unit Symbol MSZ- MSY- Part No. Part name in Wiring Remarks...
  • Page 37 MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Q'ty/unit Symbol in Wiring Remarks Part No. Part name MSZ- MSY- Diagram A09NA A12NA A15NA A17NA A15NA A17NA E12 751 509 BEARING MOUNT E12 001 504...

  • Page 38: Indoor Unit Heat Exchanger

    MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 4. INDOOR UNIT HEAT EXCHANGER Q'ty/unit Symbol in Wiring MSZ- MSY- Part No. Part name Remarks Diagram A09NA A12NA A15NA A17NA A15NA A17NA E12 A54 620 INDOOR HEAT EXCHANGER E12 A56 620 INDOOR HEAT EXCHANGER...

  • Page 39: Including

    MSZ-A24NA MSY-A24NA 6. INDOOR UNIT STRUCTURAL PARTS 7. INDOOR UNIT HEAT EXCHANGER (See 10-10.) 6. 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 MSZ-A24NA MSY-A24NA Diagram E12 527 970...
  • Page 40 MSZ-A24NA MSY-A24NA 9. ACCESSORY AND 8. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part Name Remarks MSZ-A24NA...
  • Page 41 10. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME FILTER) AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. Normal life of AIR CLEANING FILTER is 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months.

  • Page 42: Microprocessor Control

    MICROPROCESSOR CONTROL MSZ-A09NA MSZ-A17NA MSY-A15NA MSZ-A12NA MSZ-A24NA MSY-A17NA MSZ-A15NA MSY-A24NA WIRELESS REMOTE CONTROLLER w These pictures show MSZ-A24. Signal transmitting section (This diagram shows an overall view.) Operation display section ON/OFF (operate/ stop) button VANE button (Horizontal vane button) Fan speed control button...
  • Page 43 11-1. COOL ( ) OPERATION (1) Press OPERATE/STOP(ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button)to select the desired temperature. The setting range is 61 ~ 88°F.
  • Page 44 (4) The initial set temperature is decided by the initial room temperature. Model Initial room temperature Initial set temperature 79°F or more 75°F COOL mode of "I FEEL CONTROL" Initial room temperature 77°F to 79°F minus 4°F Initial room temperature DRY mode of less than 77°F "I FEEL CONTROL"...
  • Page 45 11-7. AUTO VANE OPERATION 1. Horizontal vane (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 (approximate 12V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
  • Page 46 (9) To change the air flow direction not to blow directly onto your body. (MSZ-A09/12/15/17, MSY-A15/17) To change the air HEAT When to use this function? COOL/DRY flow direction (for MSZ) Pressing and holding Use this function if you don’t The air conditioner starts the The air conditioner starts heat- want the air from the indoor...
  • Page 47 (5) WIDE MODE ( By selecting WIDE mode with WIDE VANE button, indoor fan speed becomes faster than setting fan speed on the remote controller (W). The remote controller displays “ ”. NOTE : The position of vane angle 3, angle 4 and angle 5 are different in COOL operation and HEAT operation. W Indoor fan speed becomes faster than setting fan speed on the remote controller even when selected.
  • Page 48 Press again <Heat> Press once again <Stop> (MSY type) Press once <Cool> Press again <Stop> C C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD New publication, effective Apr. 2006 Distributed in Apr. 2006. No. OB450 7 Specifications subject to change without notice.
  • Page 49 3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024 ● Toll Free: 800-433-4822 Toll Free Fax: 800-889-9904 www.mrslim.com Specifications are subject to change without notice.

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