Logitech OB450 REVISED EDITION-B manual

SER VICE MANUAL CONTENTS 1. TECHNICAL CHANGES ··································· 2 2. P ART NAMES AND FUNCTIONS ····················· 3 3. SPECIFICA TION ················································ 4 4. OUTLINES AND DIMENSIONS ······?[...]

1. Remote controller has been changed. • T emperature indication function (°F/°C) has been added. (Refer to 1 1-10.) • T imer indication has been changed. (AM/PM indication) 2. Conduit plate has been removed. (MSZ-A09/12/15/17, MSY -A15/17) 3. Conduit cover , terminal block cover and terminal block holder have been changed. (MSZ-A09/12/15/17,[...]

3 P ART NAMES AND FUNCTIONS 2 MSZ-A09NA MSY -A15NA MSZ-A12NA MSY -A17NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY -A24NA MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY -A15NA MSY -A17NA Line flow fan Air outlet V ertical vane Air inlet Display section Front panel Panel Heat exchanger Horizontal vane Operation section (When the front panel is opened) Remote co[...]

4 3 SPECIFICA TION Indoor unit model MSZ-A09NA MSZ-A12NA External fi nish White Power supply V , phase, Hz 208/230, 1, 60 Max.-fuse size (time delay) / Disconnect switch A 15 Min. circuit ampacity A 1.0 Fan motor F .L.A 0.76 Air fl ow Low–Med.–High–Powerful COOL Dry (Wet) CFM 152-229-307-338 (134-205-275-303) 152-240-353-388 (134-215-318-34[...]

5 3-1. OPERA TING RANGE (1) POWER SUPPL Y Rated voltage Guaranteed V oltage (V) Indoor unit 208/230 V 1 phase 60 Hz Min.187 208 230 Max.253 (2) OPERA TION Mode Condition Intake air temperature (°F) Indoor Outdoor DB WB DB WB Cooling Standard temperature 80 67 95 — Maximum temperature 90 73 1 15 — Minimum temperature 67 57 14 — Maximum humidi[...]

6 4 OUTLINES AND DIMENSIONS Unit : inch 11 - 3 / 4 4 24-9/16 30-1 1/16 8-1/4 3/16 2-1/8 3/4 6-1/4 2-5/16 Air in Air out Installation plate Insulation 1-1/8 Drain hose 5/8 (Connected part O.D) Liquid line 1/4 19-1 1/16 Gas line 3/8 16-15/16 Insulation 1-3/8 O.D 3/4 I.D { 6-1/8 6-1/8 7/8 1-3/4 13-3/16 12-5/8 1-5/8 8-7/16 10-1/8 1-1 1/16 8-7/16 1/8 1 [...]

7 10-1/4 6-1/4 3/4 2-5/16 1-7/8 5/16 12-3/8 10-1/16 1-7/8 1/8 3-7/8 6-13/16 3-7/8 6-13/16 16-5/16 16-5/16 3/16 9-15/16 31-1/8 2-3/16 42-1/16 43-5/16 12-13/16 Air out Air in Insulation 1-1/8 Drain hose 5/8 (Connected part O.D) Installation plate W all hole 3 Wireless remote controller Installation plate Indoor unit { Liquid line 1/4 19-1 1/16 Gas li[...]

8 5 WIRING DIAGRAM MSZ-A09NA MSY -A15NA MSZ-A12NA MSY -A17NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY -A24NA[...]

9 REFRIGERANT SYSTEM DIAGRAM 6 MSZ-A09NA MSZ-A12NA Refrigerant flow in cooling Refrigerant flow in heating MSZ-A15NA MSY -A15NA MSZ-A17NA MSY -A17NA MSZ-A24NA MSY -A24NA Unit : inch Indoor heat exchanger Room temperature thermistor RT1 1 Refrigerant pipe ø1/2 (with heat insulator) Flared connection Flared connection Indoor coil thermistor RT12(mai[...]

10 7 SER VICE FUNCTIONS 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. However , the star[...]

11 8-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. T ake care of the following during servicing 1) Before servicing the air conditioner , be sure to turn OFF the unit first with the remote controller , and then after conf[...]

12 3. T roubleshooting procedure 1) First, check if the OPERA TION INDICA TOR lamp on the indoor unit is flashing ON and OFF to indicate an abnormality . T o 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[...]

13 Those figures show about MSZ-A09/12/15/17. 2. Blinking pattern when the indoor unit is abnormal: 3.Blinking pattern when the outdoor unit is abnormal: ON OFF Beeps Repeated cycle Repeated cycle ON OFF No beep Beeps Repeated cycle 2.5-second OFF Blinking at 0.5- second interval 2.5-second OFF 3-second ON Blinking at 0.5- second interval Beeps Rep[...]

14 2. Indoor unit failure mode table Left lamp of OPERA TION INDICA TOR lamp Abnormal point (Failure mode) Condition Correspondence Not lighted Normal — — 1-time fl ash every 0.5-second Room temperature thermistor The room temperature thermistor short or open circuit is detected every 8 seconds dur- ing operation. Refer to the characteristics [...]

15 8-3. INSTRUCTION OF TROUBLESHOOTING Indoor unit oper- ates. Outdoor unit doesn't operate. If blinking of OPERA TION INDI- CA T OR lamp cannot be checked, it can be checked with failure mode recall function. Indoor unit operates. Outdoor unit doesn't operate normally . Indoor unit doesn't receive the signal from remote controller .[...]

16 8-4. TROUBLESHOOTING CHECK T ABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after th e power ON), the indoor fan motor turns OFF and OPERA TION INDICA TOR lamp flashes. OPERA TION[...]

8-5. TROUBLE CRITERION OF MAIN P ARTS 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 thermistor(RT1 1) Measure the resistance with a tester . Refer to 8-7. "T est point diagram and voltage", "Indoor electronic control P .C. board", t[...]

18 A Check of indoor fan motor 8-6. TROUBLESHOOTING FLOW The indoor fan motor error has occurred, and the indoor fan doesn't operate. T urn OFF the power supply . Is there any foreign matter that interferes the rotation of the line fl ow fan? Ye s No Remove the foreign matter and adjust the line fl ow fan. Pay careful attention to the high v[...]

19 B Check of remote controller and indoor electronic control P .C. board Check if the remote controller is exclusive for this air conditioner . Does the unit operate with the remote controller? OK Ye s No (Not clear) Replace the batteries. (Refer to 8-1.4.) Press OPERA TE/STOP (ON/OFF) button on the remote controller . Is LCD display on the remote[...]

20 CN21 1 Fuse(F1 1) V aristor(NR1 1) Indoor electronic control P .C.Board C Check of indoor electronic control P .C. board and indoor fan motor T urn OFF the power supply . Remove indoor fan motor connector CN21 1 and vane motor connector CN151 from the indoor electronic control P .C. board and turn ON the power supply . Does the unit operate with[...]

21 D How to check miswiring and serial signal error T urn OFF the power supply . Is there rated voltage in the power supply? Ye s No T urn ON the power supply . Check the power supply . Is there rated voltage between outdoor terminal block S1 and S2? No Check the wiring. Press EMERGENCY OPERA TION switch once. Does the left lamp of OPERA TION INDIC[...]

22 E Electromagnetic noise enters into TV sets or radios Ye s Is the unit grounded? No Ground the unit. Ye s Is the distance between the antennas and the indoor unit within 9.91 ft., or is the distance between the antennas and the outdoor unit within 9.91 ft.? No Extend the distance between the antennas and the indoor unit, and/or the antennas and [...]

23 Indoor coil thermistor [RT12 (MAIN), RT13 (SUB)] Room temperature thermistor (RT1 1) T emperature (°F) Resistance (k ) MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY -A15NA MSY -A17NA Indoor electronic control P .C. board Release of Auto restart function Solder the Jumper wire to JR07 (Refer to 7-3.) 208/230 V AC Fuse (F1 1) 250 V 3.15 A Indoor co[...]

24 (+)0 or 15 VDC Indoor coil thermistor [RT12 (MAIN), RT13 (SUB)] Room temperature thermistor (RT1 1) T emperature (°F) Resistance (k ) MSZ-A24NA MSY -24NA Indoor electronic control P .C. board Release of Auto restart function Solder the Jumper wire to JR07 (Refer to 6-3.) 208/230 V AC Fuse (F1 1) 250 V 3.15 A Indoor coil thermis- tor RT12(MAIN) [...]

9-1. MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY -A15NA MSY -A17NA OPERA TING PROCEDURE PHOTOS 1. Removing the panel (1) Remove the horizontal vane. (2) Remove the screw caps of the panel. Remove the screws. (Photo 1) (3) Hold the lower part of both ends on the panel and pull it slightly toward you, and then remove the panel by pushing it upward. P[...]

OPERA TING PROCEDURE PHOT OS 2. Removing the electronic control P .C. board, the 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 . (Photo 2 or Photo 3) (3) Remove the indoor/outdoor conn[...]

OPERA TING PROCEDURE PHOT OS 4. Removing the horizontal vane motor unit (1) Remove the horizontal vane, the panel (refer to 1.) and the corner box. (2) Remove the screws of the horizontal vane motor unit, and pull out the horizontal vane motor unit. (Photo 7) (3) Disconnect the connector from the horizontal vane motor unit. Photo 7 5. Removing the [...]

9-2.MSZ-A24NA MSY -A24NA OPERA TING PROCEDURE PHOT OS 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 2. Removing the electronic control P .C. board, the receiver P .C. board and the display P .C. board (1) Remove th[...]

OPERA TING PROCEDURE PHOT OS 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 [...]

30 10 P ARTS LIST 10-1. P ARTS LIST (non-RoHS compliant) MSZ-A09NA MSY -A15NA MSZ-A12NA MSY -A17NA MSZ-A15NA MSZ-A17NA 1. INDOOR UNIT STRUCTURAL P ARTS 2. ACCESSOR Y AND REMOTE CONTROLLER 1 8 2 4 3 9 5 6 12 11 7 (See 10-1.5.) 10 1. INDOOR UNIT STRUCTURAL P ARTS No. Part No. Part name Symbol in Wiring Diagram Q'ty/unit Remarks MSZ- MSY - A09NA [...]

31 3. INDOOR UNIT ELECTRICAL P ARTS AND FUNCTIONAL P ARTS MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY -A15NA MSY -A17NA 5 3 8 1 7 6 10 11 13 18 9 12 16 14 15 17 4 2 12 No. Part No. Part name Symbol in Wiring Diagram Q'ty/unit Remarks MSZ- MSY - A09NA A12NA A15NA A17NA A15NA A17NA 1 E02 751 509 BEARING MOUNT 1 1 1 1 1 1 2 E02 001 504 SLEEVE BEA[...]

32 1 4. INDOOR UNIT HEA T EXCHANGER 3 2 Air cleaning filter (Blue bellows type) (1) Remove the catechin air filter (left one). The air cleaning filter is not attached to the right side catechin air filter . (2) Remove the air cleaning filter (Blue bel- lows type) from the catechin air filter . Replacement of the air cleaning filter 5. AIR CLEANING [...]

33 MSZ-A24NA MSY -A24NA 6. INDOOR UNIT STRUCTURAL P ARTS 7. INDOOR UNIT HEA T EXCHANGER 2 4 5 7 6 1 11 8 12 13 3 9 (See 10-1.10.) 6. INDOOR UNIT STRUCTURAL P ARTS Part number that is circled is not shown in the illustration. No. Part No. Part Name Symbol in Wiring Diagram Q'ty/unit Remarks MSZ-A24NA MSY -A24NA 1 E02 527 970 INST ALLA TION PLA [...]

34 MSZ-A24NA MSY -A24NA 9. ACCESSOR Y AND REMOTE CONTROLLER 8. INDOOR UNIT FUNCTIONAL P ARTS AND ELECTRICAL P ARTS 21 22 17 2 6 4 7 11 5 3 10 1 16 18 8 15 13 14 9 12 15 8. INDOOR UNIT FUNCTIONAL P ARTS AND ELECTRICAL P ARTS Part numbers that is circled is not shown in the illustration. No. Part No. Part Name Symbol in Wiring Diagram Q'ty/unit [...]

35 Air cleaning filter (Anti-allergy enzyme filter:blue bellows type) 10. AIR CLEANING FIL TER (ANTI-ALLERGY ENZYME FIL TER) ● AIR CLEANING FIL TER removes fine dust of 0.01 micron from air by means of static electricity . ● Normal life of AIR CLEANING FIL TER is 1 year . If AIR CLEANING FIL TER is to be washed, soak AIR CLEANING FIL TER in wat[...]

36 10-2. RoHS P ARTS LIST (RoHS compliant) MSZ-A09NA MSY -A15NA MSZ-A12NA MSY -A17NA MSZ-A15NA MSZ-A17NA 1. INDOOR UNIT STRUCTURAL P ARTS 2. ACCESSOR Y AND REMOTE CONTROLLER 1 8 2 4 3 9 5 6 12 11 7 (See 10-2.5.) 10 1. INDOOR UNIT STRUCTURAL P ARTS No. RoHS Part No. Part name Symbol in Wiring Diagram Q'ty/unit Remarks MSZ-A MSY -A 09NA 12NA 15N[...]

37 3. INDOOR UNIT ELECTRICAL P ARTS AND FUNCTIONAL P ARTS MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY -A15NA MSY -A17NA 5 3 8 1 7 6 11 12 14 19 10 13 17 16 15 18 4 2 12 9 No. RoHS Part No. Part name Symbol in Wiring Diagram Q'ty/unit Remarks MSZ-A MSY -A 09NA 12NA 15NA 17NA 15NA 17NA - 1 - 1 - 1 - 1 - 1 - 1 1 G E12 751 509 BEARING MOUNT 1 1 1 [...]

38 1 4. INDOOR UNIT HEA T EXCHANGER 3 2 Air cleaning filter (Blue bellows type) (1) Remove the catechin air filter (left one). The air cleaning filter is not attached to the right side catechin air filter . (2) Remove the air cleaning filter (Blue bel- lows type) from the catechin air filter . Replacement of the air cleaning filter 5. AIR CLEANING [...]

39 MSZ-A24NA MSY -A24NA 6. INDOOR UNIT STRUCTURAL P ARTS 7. INDOOR UNIT HEA T EXCHANGER 2 4 5 7 6 1 11 8 12 13 3 9 (See 10-2.10.) 6. INDOOR UNIT STRUCTURAL P ARTS Part number that is circled is not shown in the illustration. No. RoHS Part No. Part Name Symbol in Wiring Diagram Q'ty/unit Remarks MSZ-A24NA MSY -A24NA - 1 - 1 1 G E12 527 970 INST[...]

40 MSZ-A24NA MSY -A24NA 9. ACCESSOR Y AND REMOTE CONTROLLER 8. INDOOR UNIT FUNCTIONAL P ARTS AND ELECTRICAL P ARTS 21 22 17 2 6 4 7 11 5 3 10 1 16 18 8 15 13 14 9 12 15 8. INDOOR UNIT FUNCTIONAL P ARTS AND ELECTRICAL P ARTS Part numbers that are circled are not shown in the illustration. No. RoHS Part No. Part Name Symbol in Wiring Diagram Q't[...]

41 Air cleaning filter (Anti-allergy enzyme filter:blue bellows type) 10. AIR CLEANING FIL TER (ANTI-ALLERGY ENZYME FIL TER) ● AIR CLEANING FIL TER removes fine dust of 0.01 micron from air by means of static electricity . ● Normal life of AIR CLEANING FIL TER is 1 year . If AIR CLEANING FIL TER is to be washed, soak AIR CLEANING FIL TER in wat[...]

42 11 MICROPROCESSOR CONTROL Once the operation mode is set, the same operation mode can be repeated by simply turning OPERA TE/ST OP (ON/OFF) button ON. 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. WIRELES[...]

43 1 1-1. COOL ( ) OPERA TION (1) Press OPERA TE/ST OP (ON/OFF) button. OPERA TION INDICA TOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERA TION SELECT button. (3) Press TEMPERA TURE buttons (TOO W ARM or TOO COOL button) to select the desired temperature. The setting range is 61 ~ 88°F . 1. Coil frost preventi[...]

44 1 1-6. AUTO CHANGE OVER ··· AUTO MODE OPERA TION (MSZ) Once desired temperature is set, unit operation is switched automatically between COOL and HEA T operation. Mode selection (1) Initial mode When unit starts the operation with AUTO operation from of f; • If the room temperature is higher than the set temperature, operation starts in COO[...]

45 (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 the following cases. (a) When the operation starts or finishes (including timer operation). (b) When the test run starts. (c) When multi-standby starts or finishes. (4) V[...]

46 (9) T o change the air fl ow direction not to blow directly onto your body . (MSZ-A09/12/15/17, MSY -A15/17) T o change the air fl ow direc- tion When to use this function? COOL/DR Y HEA T (For MSZ) Pressing and holding V ANE CONTROL button for 2 seconds or more cause the horizontal vane to reverse and move to horizontal posi- tion. Use this f[...]

47 1 1-8. TIMER OPERA TION 1. How to set the time (1) Press OPERA TE/STOP (ON/OFF) button to start the air conditioner . (2) Check that the current time is set correctly . NOTE : T imer operation will not work without setting the current time. Initially “0:00” blinks at the current time display of TIME MONITOR, so set the current time correctly[...]

EMERGENCY OPERA TION switch E.O. SW 1 1-9. EMERGENCY/TEST OPERA TION In case of test run operation or emergency operation, use EMERGENCY OPERA TION 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 OPE[...]