OB450B-1.qxp 07.5.14 4:13 PM Page 1 Revision B: • MSZ-A•NAadded. SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS 1 and MSY-A•NA- 1 have been Please void OB450 REVISED EDITION-A. INDOOR UNIT No.
OB450B-1.qxp 07.5.14 4:13 PM Page 2 Revision A : • PARTS LIST has been revised. (10-1.8, 10-2.8) Revision B : • MSZ-A•NA- 1 and MSY-A•NA- 1 Remote controller has been changed. 1 TECHNICAL CHANGES MSZ09UN MSZ12UN MSH15TN MSH17TN ➔ ➔ ➔ ➔ MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSH24WN MS15TN MS17TN MS24WN ➔ ➔ ➔ ➔ MSZ-A24NA MSY-A15NA MSY-A17NA 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.
OB450B-1.qxp 07.5.
OB450B-1.qxp 3 07.5.14 4:13 PM Page 4 SPECIFICATION Model Item Indoor unit model External finish Power supply V, phase, Hz Max.-fuse size (time delay)/ Disconnect switch A Min. circuit ampacity A Fan motor F.L.A CFM Airflow Low—Med.—High HEAT Dry CFM COOL Dry (Wet) Moisture removal pt./h Sound level Low-Med.-High dB(A) Cond. drain connection O.D. in. in. W Dimensions in. D in. H Weight Ib.
OB450B-1.qxp 07.5.14 4:13 PM Page 5 3-1. OPERATING RANGE (1) POWER SUPPLY Model Rated voltage MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSY-A24NA MSZ-A17NA MSZ-A24NA 208/230V 1phase 60Hz Guaranteed Voltage Min. 198V 208V 230V Max.
Page 6 OUTLINES AND DIMENSIONS MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA Installation plate 8-7/8 Indoor unit 8-7/8 2-3/16 7/8 hole 7/8 10-1/8 8-7/16 2-3/16 1-5/8 30-11/16 and MSY-A•NA- are excluded.) 7/16x13/16 Oblong hole 6-1/8 2-3/16 6-1/8 13-3/16 1-3/4 12-5/8 Air in 8-1/4 11-3/4 24-9/16 3/16 Installation plate Liquid line [1/4 19-11/16 Gas line [3/8 16-15/16 Insulation [1-3/8 O.D [3/4 I.D Drain hose [5/8 (Connected part O.
Page 7 Unit : inch MSZ-A24NA MSY-A24NA Installation plate Indoor unit 3-7/8 5/16 6-13/16 3-7/8 16-5/16 16-5/16 6-13/16 1/8 1-7/8 10-1/16 42-1/16 12-3/8 07.5.14 4:13 PM 1-7/8 OB450B-1.qxp Wall hole [3 10-1/4 43-5/16 Air in 3/16 Installation plate 12-13/16 { 2-3/16 31-1/8 9-15/16 Air out Drain hose [5/8 (Connected part O.D) Insulation [1-1/8 3/4 6-1/4 2-5/16 Liquid line [1/4 19-11/16 Gas line [5/8 16-15/16 Insulation [1-15/16 O.D [1-1/4 I.
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OB450B-1.qxp 7 07.5.14 4:13 PM Page 10 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.) Set time : 1-minute ➔ 1-second Set time : 3-minute ➔ 3-second (It takes 3 minutes for the compressor to start operation.
OB450B-1.qxp 07.5.14 4:13 PM Page 11 7-3. 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 power has restored after power failure. Then, the unit will restart automatically. Operation 1 If the main power has been cut, the operation settings remain.
OB450B-1.qxp 07.5.14 4:13 PM 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. 3) If the electronic control P.C.
OB450B-1.qxp 07.5.14 4:13 PM 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. 1.
OB450B-1.qxp 07.5.14 4:13 PM Page 14 2. Indoor unit failure mode table Left lamp of OPERATION INDICATOR lamp Not lighted Abnormal point (Failure mode) Condition Correspondence Normal – – 1-time flash every 0.5-second Room temperature thermistor The room temperature thermistor short or open circuit is detected every 8 seconds during operation. Refer to the characteristics of the room temperature thermistor (8-7.). 2-time flash 2.
OB450B-1.qxp 07.5.14 4:13 PM Page 15 8-3. Instruction of troubleshooting Start Indoor unit operates. Outdoor unit doesn't operate. Indoor unit operates. Outdoor unit doesn't operate normally. Indoor unit doesn't receive the signal from remote controller. Outdoor unit operates only in Test Run operation. w Outdoor unit doesn't operate even in Test Run operation. w Unit doesn't operate normal operation in COOL or HEAT mode. Indoor unit operates, when EMERGENCY OPERATION switch is pressed.
OB450B-1.qxp 07.5.14 4:13 PM 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. Lighted OPERATION INDICATOR No.
OB450B-1.qxp 07.5.14 4:13 PM Page 17 OPERATION INDICATOR Lighted Blinking Not lighted No. 1 Abnormal point MXZ type Operation mode setting · Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates abnormality. · OPERATION INDICATOR lamp (left-hand side lamp) is lighted. Operation indicator lamp Right lamp flash 2.5-second OFF Symptom Condition Correspondence Outdoor unit operates but indoor unit does not operate.
OB450B-1.qxp 07.5.14 4:13 PM Page 18 8-6. Troubleshooting flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan does not operate. A 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.
OB450B-1.qxp 07.5.14 4:13 PM Page 19 Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller. B 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 remote controller visible? No Replace the batteries. (Refer to 8-1.4.) (not clear) Yes Remove the batteries, then set them back and press RESET button. (Refer to 8-1.4.
OB450B-1.qxp 07.5.14 4:13 PM Page 20 The unit does not operate with the remote controller. Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch. C Check of indoor electronic control P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply. Measure the resistance between CN211 3 and 4 of the indoor fan motor connector.
OB450B-1.qxp 07.5.14 4:13 PM 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. D How to check mis-wiring and serial signal error Turn OFF the power supply. Is there rated voltage AC in the power supply? No Check the power supply. Yes Turn ON the power supply.
OB450B-1.qxp 07.5.14 4:13 PM Page 22 E Electromagnetic noise enters into TV sets or radios No Is the unit grounded? Ground the unit. Yes Is the distance between the antennas and the indoor unit within 9.91ft., or is the distance between the antennas and the outdoor unit within 9.91ft.? Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit. Yes No Is the distance between the TV sets or radios and the indoor unit within 3.28ft.
OB450B-1.qxp 07.5.14 4:13 PM Page 23 8-7. Test point diagram and voltage MSZ-A09NA MSZ-A17NA MSZ-A12NA MSY-A15NA MSZ-A15NA MSY-A17NA Indoor electronic control P.C. board Power supply input 208/230V AC } Varistor (NR11) Fuse(F11) 250V 3.15A Cement resistor (R111) Indoor fan motor (CN211) 1294/325V DC 3(-) Fiducial terminal of cathode side on measuring high-voltage DC 415V DC 5(+)3-6V DC 6(+)0V DC or 15V DC Release of Auto restart function Solder the Jumper wire to JR07 (Refer to 7-3.
OB450B-1.qxp 07.5.14 4:13 PM MSZ-A24NA Page 24 MSY-24NA Indoor electronic control P.C. board Cement resistor (R111) Varistor (NR11) Power supply input 208/230V AC } Release of Auto restart function Solder the Jumper wire to JR07 (Refer to 6-3.) Fuse(F11) 250V 3.15A Indoor fan motor (CN211) 1294/325V DC 3(-) Fiducial terminal of cathode side on measuring high-voltage DC 415V DC Display P.C.
OB450B-1.qxp 07.5.14 4:13 PM 9 Page 25 DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. (1) Slide the sleeve and check if there is a locking lever or not.
OB450B-1.qxp 07.5.14 4:13 PM Page 26 OPERATING PROCEDURE PHOTOS 2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, SW P.C. board and the terminal block Photo 4 (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. or Photo 3.) (3) Remove the indoor/outdoor connecting wire. (4) Remove the switch holder from the electrical cover. (See Photo 4.
OB450B-1.qxp 07.5.14 4:13 PM Page 27 OPERATING PROCEDURE PHOTOS Photo 7 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 7.) (3) Disconnect the connector from the horizontal vane motor unit. 5. Removing the indoor fan motor and the line flow fan (1) Remove the horizontal vane, the panel (Refer to 1.) and the corner box.
OB450B-1.qxp 07.5.14 4:14 PM Page 28 9-2.MSZ-A24NA MSY-A24NA OPERATING PROCEDURE PHOTOS 1. Removing the 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. Photo 1 Front panel Corner box Screws 2. Removing the electronic control P.C. board, the receiver P.C. board and the display P.C. board (1) Remove the front panel. (Refer to 1.
OB450B-1.qxp 07.5.14 4:14 PM Page 29 OPERATING PROCEDURE PHOTOS 4. Removing the vane motor (1) Remove the front panel. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Remove the lead wire of vane motor.(Refer to 3.) (4) Remove the R.L. holder. (5) Pull out the drain hose from the nozzle assembly and remove the nozzle assembly. (6) Remove the screws of the vane motor and disconnect the connector. (7) Remove the vane motor.
OB450B-1.qxp 07.5.14 4:14 PM 10 Page 30 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 9 1 12 11 10 8 2 7 (See 10-5.) 3 4 5 6 1. INDOOR UNIT STRUCTURAL PARTS No. 1 2 3 4 5 6 7 8 9 10 Part No.
OB450B-2.qxp 07.5.14 4:16 PM MSZ-A09NA Page 31 MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 1 18 17 15 16 14 2 3 4 5 6 11 10 9 12 No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Part No.
OB450B-2.qxp 07.5.14 4:16 PM MSZ-A09NA Page 32 MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 4. INDOOR UNIT HEAT EXCHANGER 1 2 3 No. 1 2 3 Part No. E02 E02 E02 E02 E02 A54 A56 815 155 151 620 620 666 666 667 Part name INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER UNION (GAS) UNION (GAS) UNION (LIQUID) Q'ty/unit Symbol MSZMSYin Wiring Remarks Diagram A09NA A12NA A15NA A17NA A15NA A17NA 1 1 1 1 1 1 {3/8 1 1 1 1 1 1 {1/2 1 1 1 1 1 1 {1/4 5.
OB450B-2.qxp 07.5.14 4:16 PM Page 33 MSZ-A24NA MSY-A24NA 6. INDOOR UNIT STRUCTURAL PARTS 7. INDOOR UNIT HEAT EXCHANGER 1 2 11 3 4 8 5 9 (See 10-10.) 12 13 6 7 6. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. No. Part No.
OB450B-2.qxp 07.5.14 4:16 PM Page 34 MSZ-A24NA MSY-A24NA 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 1 9. ACCESSORY AND REMOTE CONTROLLER 18 17 21 22 2 3 4 9 16 10 5 6 12 11 15 8 7 13 15 14 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Part No.
OB450B-2.qxp 07.5.14 4:17 PM Page 35 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.
OB450B-2.qxp 07.5.14 4:17 PM Page 36 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 9 1 12 11 10 8 2 7 (See 10-5.) 3 4 5 6 No. RoHS 1. INDOOR UNIT STRUCTURAL PARTS 1 2 3 4 5 6 7 8 9 10 G G G G G G G G G G Part No.
OB450B-2.qxp 07.5.14 4:17 PM MSZ-A09NA Page 37 MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 1 19 18 17 15 16 2 3 4 5 6 12 11 10 No. RoHS 12 Part No.
OB450B-2.qxp 07.5.14 4:17 PM MSZ-A09NA Page 38 MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 4. INDOOR UNIT HEAT EXCHANGER 1 2 No. RoHS 3 Part No.
OB450B-2.qxp 07.5.14 4:17 PM Page 39 MSZ-A24NA MSY-A24NA 6. INDOOR UNIT STRUCTURAL PARTS 7. INDOOR UNIT HEAT EXCHANGER 1 2 11 3 4 8 5 9 (See 10-10.) 12 13 6 7 6. INDOOR UNIT STRUCTURAL PARTS No. RoHS Part number that is circled is not shown in the illustration. G G G G G G G G G 10 G 1 2 3 4 5 6 7 8 9 Part No.
OB450B-2.qxp 07.5.14 4:17 PM Page 40 MSZ-A24NA MSY-A24NA 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 18 1 2 9. ACCESSORY AND REMOTE CONTROLLER 17 21 22 3 4 9 16 10 5 6 12 11 15 8 7 13 14 15 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 RoHS Part numbers that are circled are not shown in the illustration. G G G G G G G G G G G G G G G G G G G G G Part No.
OB450B-2.qxp 07.5.14 4:17 PM 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.
OB450B-2.qxp 11 07.5.14 4:17 PM Page 42 MICROPROCESSOR CONTROL MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSZ-A24NA MSY-A17NA MSY-A24NA WIRELESS REMOTE CONTROLLER w These pictures show MSZ-A24. Signal transmitting section (This diagram shows an overall view.
OB450B-2.qxp 07.5.14 4:17 PM 11-1. COOL ( Page 43 ) 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. 1. Coil frost prevention When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
OB450B-2.qxp 07.5.14 4:17 PM Page 44 (4) The initial set temperature is decided by the initial room temperature.
OB450B-2.qxp 07.5.14 4:17 PM 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 (approx. 12V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
OB450B-2.qxp 07.5.14 4:17 PM Page 46 (9) To change the airflow direction not to blow directly onto your body. (MSZ-A09/12/15/17, MSY-A15/17) To change the air flow direction Pressing and holding VANE CONTROL button for 2 seconds or more causes the horizontal vane to reverse and move to horizontal position. When to use this function? COOL/DRY HEAT (for MSZ) Use this function if you don’t want the air from the indoor unit to blow directly onto your body.
OB450B-2.qxp 07.5.14 4:17 PM 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. or is 11-8. TIMER OPERATION 1.
OB450B-2.qxp 07.5.14 4:17 PM Page 48 11-9. EMERGENCY/TEST OPERATION In case of test run operation or emergency operation, use 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 the remote controller run down. The unit will start and OPERATION INDICATOR lamp will light. The first 30 minutes of operation is the test run operation. This operation is for servicing.