Mitsubishi Electronics MSZ-A12NA manual

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

2 1 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 i[...]

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 Vertical vane Air inlet Display section Front panel Panel Heat exchanger Horizontal vane Operation section (When the front panel is opened) Remote con[...]

4 3 SPECIFICA TION NOTE : T est conditions are based on ARI 210/240. ❈ 1 : Rating conditions (cooling) — Indoor : 80 ˚ FDB, 67 ˚ FWB, Outdoor : 95 ˚ FDB, (75 ˚ FWB) (heating) — Indoor : 70 ˚ FDB, 60 ˚ FWB, Outdoor : 47 ˚ FDB, 43 ˚ FWB ❈ 2 : (heating) — Indoor : 70 ˚ FDB, 60 ˚ FWB, Outdoor : 17 ˚ FDB, 15 ˚ FWB Item Model MSZ-A1[...]

5 MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A15NA MSY-A15NA MSZ-A17NA MSZ-A17NA MSY-A17NA MSZ-A24NA MSZ-A24NA MSY-A24NA Model Mode HEAT COOL HEAT COOL HEAT COOL HEAT COOL HEAT COOL 307 307 275 353 353 318 381 381 342 381 381 342 568 568 508 16.8 16.8 15.1 19.3 19.3 17.4 20.9 20.9 18.8 20.9 20.9 18.8 20.2 20.2 18.1 23.4 23.4 21.0 26.7 26.7 24.1 28.8 28.8 26[...]

6 4 OUTLINES AND DIMENSIONS Unit : inch 11-3/4 4 24-9/16 30-11/16 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 19-11/16 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 1-11/16 8-7/16 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 Wall hole [ 3 Wireless remote controller Installation plate Indoor unit { Liquid line [ 1/4 19-1 1/16[...]

8 5 WIRING DIAGRAM MSZ-A09NA MSY -A15NA MSZ-A12NA MSY -A17NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY -A24NA OB450-1.qxp 06.11.29 1:37 PM Page 8[...]

9 REFRIGERANT SYSTEM DIAGRAM 6 MSZ-A09NA MSZ-A12NA Indoor heat exchanger Flared connection Room temperature thermistor RT1 1 Indoor coil thermistor RT13(sub) Flared connection Refrigerant pipe [ 3/8 (with heat insulator) Refrigerant pipe [ 1/4 (with heat insulator) Indoor coil thermistor RT12(main) Refrigerant flow in cooling Refrigerant flow in he[...]

10 7 SER VICE FUNCTIONS 7-2. P .C. BOARD MODIFICA TION FOR INDIVIDUAL OPERA TION A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller , P .C. boards of remote controller must be modified according to the number of the indoor unit. 7-1. TI[...]

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 mis-wiring. 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 c[...]

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 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 .[...]

14 2. Indoor unit failure mode table NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (8-4.). 12-time flash 2.5-second OFF Replace the indoor electronic control P.C. board. Indoor control system It cannot properly read data in the nonvolatile memory of the indoor electronic control P.C. board. 11-time flash [...]

15 Start Indoor unit operates. Outdoor unit doesn't operate. Indoor unit doesn't receive the signal from remote controller . OPERA TION INDICA TOR lamp on the indoor unit is flashing on and off. Outdoor unit operates only in T est Run operation. w Outdoor unit doesn't operate even in T est Run operation. w Indoor unit operates, when [...]

16 No. 1 3 6 7 Symptom Operation indicator lamp Condition Correspondence Left lamp flashes. 0.5-second ON 0.5-second OFF Mis-Wiring or serial signal Outdoor power system Outdoor thermistors Outdoor control system Indoor coil thermistor The serial signal from the outdoor unit is not received for a maximum of 6 minutes. It consecutively occurs 3 time[...]

17 OPERA TION INDICA TOR Not lighted Blinking Lighted No. Symptom Operation indicator lamp Condition Correspondence Abnormal point 1 MXZ type Operation mode setting Outdoor unit operates but indoor unit does not operate. The operation mode of the each indoor unit is differently set to COOL(includes DR Y) and HEA T at the same time, the operation mo[...]

18 Check of indoor fan motor A When OPERA TION INDICA TOR lamp flashes 3-time. Indoor fan does not operate. w If more than 12 seconds or more passes after EMERGENCY OPERATION switch is pressed, the voltage mentioned above 2 goes 0V DC although the indoor electric control P.C. board is normal. Indoor electronic control P.C. board Pay careful attenti[...]

19 Check of remote controller and receiver P .C. board B Indoor unit operates by pressing EMERGENCY OPERA TION switch, but does not operate with the remote controller . w Check if the remote controller is exclusive for this air conditioner . Ye s Replace the batteries. (Refer to 8-1.4.) T urn ON a radio to AM and press switch ON the remote controll[...]

20 The unit does not operate with the remote controller . Also, OPERA TION INDICA TOR lamp does not light up by pressing EMERGENCY OPERA TION switch. Check of indoor electronic control P .C. board and indoor fan motor C Yes No w 1. The fan motor connector's 1 lead wire is red, whereas 3 is black. w 2. Connect "+" of the tester to fan[...]

21 How to check mis-wiring and serial signal error D Is there rated voltage AC in the power supply? Is there any mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? W 1. Mis-wiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation st[...]

22 Electromagnetic noise enters into TV sets or radios E Replace or repair the antenna. Replace or repair the coaxial cable. No No No Yes Yes No No Yes Yes 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.? Is the distance between the TV sets or r[...]

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.) 208/230V AC Fuse(F1 1) Indoor coil the[...]

24 6 (+)0V DC or 15V DC 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.) 208/230V AC Fuse(F1 1) Indoor coil thermistor RT12(MAIN) RT[...]

25 DISASSEMBL Y INSTRUCTIONS 9 (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. 1 Slide the sleeve. 2 Pull the terminal while pushing the locking lever . 1 Hold the sleeve, and pull out the terminal slowly . The terminal which has the locking mechanism can be detached[...]

26 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 . (See Photo 2.) (3) Remove the indoor/outdoor connecting wire. (4) Remove the swit[...]

27 OPERA TING PROCEDURE PHOTOS Photo 7 Photo 9 Screws of the left side of the heat exchanger 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.) (3) Disconnect the connector from the[...]

28 9-2.MSZ-A24NA MSY -A24NA OPERA TING 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 Photo 2 Front panel Indoor electronic control P .C. board T .B. SW cover Screws R.L holder Receiver P .C. board [...]

29 OPERA TING PROCEDURE PHOTOS Photo 4 Photo 6 V ane motors 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) [...]

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 No. Part No. Part name Remarks Symbol in Wiring Diagram Q'ty/unit 1 2 3 4 5 6 7 8 9 10 MSZ- MSY- 11 12 REMOTE CONTROLLER REMOTE CONTROLLER REMOTE CONTROLLER HOLDER KM06A KM06C BOX P ANEL ASSEMB[...]

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 BEARING MOUNT SLEEVE BEARING DRAIN HOSE NOZZLE ASSEMBL Y NOZZLE ASSEMBL Y V ANE MOTOR UNIT (HORIZONT AL) HORIZONT AL V ANE POWER MONITOR RECEIVER P .C. BOARD HOLDER CONDUIT COVER TERMINAL B[...]

32 1 2 3 INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER UNION (GAS) UNION (GAS) UNION (LIQUID) { 3/8 { 1/2 { 1/4 E02 A54 620 E02 A56 620 E02 815 666 E02 155 666 E02 151 667 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MSZ- MSY- A09NA A12NA A15NA A17NA A15NA A17NA Q'ty/unit No. Part No. Part name Remarks Symbol in Wiring Diagram 1 4. INDOOR UNIT HEA T EXCH[...]

33 MSZ-A24NA MSY -A24NA 6. INDOOR UNIT STRUCTURAL P ARTS MSZ-A24NA MSY -A24NA E02 527 970 E02 685 234 E02 888 000 E02 408 142 E02 685 067 E02 888 010 E02 534 100 E02 685 975 - E02 888 007 INST ALLA TION PLA TE BOX FRONT P ANEL ASSEMBL Y CA TCH SCREW CAP GRILLE CA TECHIN AIR FIL TER CORNER BOX (RIGHT) AIR CLEANING FIL TER LAMP P ANEL Symbol in Wirin[...]

34 E02 527 302 E02 408 509 E02 001 504 E02 408 702 E02 A58 235 E02 685 040 E02 685 041 E02 527 034 E02 A58 300 E02 448 303 E02 408 303 E02 918 333 E02 918 329 E02 918 468 E02 A58 452 E02 A53 452 E02 527 308 E02 A58 375 E02 918 307 E02 528 034 E02 529 034 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 LINE FLOW F AN BEARING MOUNT SLEEVE BEARING [...]

35 Model Part No. MAC-2300FT MSZ-A24NA MSY -A24NA 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[...]

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 No. RoHS Part No. Part name Remarks Symbol in Wiring Diagram Q'ty/unit 1 2 3 4 5 6 7 8 9 10 G G G G G G G G G G G G G MSZ- MSY- 11 12 REMOTE CONTROLLER REMOTE CONTROLLER REMOTE CONTROLLER HOLDER KM06A KM06C [...]

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 10 11 13 18 9 12 16 14 15 17 BEARING MOUNT SLEEVE BEARING DRAIN HOSE NOZZLE ASSEMBL Y NOZZLE ASSEMBL Y V ANE MOTOR UNIT (HORIZONT AL) HORIZONT AL V ANE POWER MONITOR RECEIVER P .C. BOARD HOLDER CONDUIT COVER TERMINAL B[...]

38 1 2 3 G G G G G INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER UNION (GAS) UNION (GAS) UNION (LIQUID) { 3/8 { 1/2 { 1/4 E12 A54 620 E12 A56 620 E12 815 666 E12 155 666 E12 151 667 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MSZ- MSY- A09NA A12NA A15NA A17NA A15NA A17NA Q'ty/unit No. RoHS Part No. Part name Remarks Symbol in Wiring Diagram 1 4. INDOOR [...]

39 MSZ-A24NA MSY -A24NA 6. INDOOR UNIT STRUCTURAL P ARTS MSZ-A24NA MSY -A24NA E12 527 970 E12 685 234 E12 888 000 E12 408 142 E12 685 067 E12 888 010 E12 534 100 E12 685 975 - E12 888 007 INST ALLA TION PLA TE BOX FRONT P ANEL ASSEMBL Y CA TCH SCREW CAP GRILLE CA TECHIN AIR FIL TER CORNER BOX (RIGHT) AIR CLEANING FIL TER LAMP P ANEL Symbol in Wirin[...]

40 E12 527 302 E12 408 509 E12 001 504 E12 408 702 E12 A58 235 E12 685 040 E12 685 041 E12 527 034 E12 A58 300 E12 448 303 E12 408 303 E12 918 333 E12 918 329 E12 918 468 E12 A58 452 E12 A53 452 E12 527 308 E12 A58 375 E12 918 307 E12 528 034 E12 529 034 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 LINE FLOW F AN BEARING MOUNT SLEEVE BEARING [...]

41 Model Part No. MAC-2300FT MSZ-A24NA MSY -A24NA 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[...]

42 11 MICROPROCESSOR CONTROL Once the operation mode is set, the same operation mode can be repeated by simply turning OPERA TE/STOP (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. WIRELESS[...]

43 1. Coil frost prevention Coil frost prevention is as same as COOL mode. (1 1-1.1.) 2. Low outside temperature operation Low outside temperature operation is as same as COOL mode. (1 1-1.2.) 1. Cold air prevention control When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room temperature [...]

44 1 1-6. AUT O CHANGE OVER ··· AUT O 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 C[...]

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. 1 1-7[...]

46 The air conditioner starts heat- ing operation appro x. 3 min utes after the v ane has moved to the horizontal position. • Sometimes the area around your f eet may not warm. T o warn the area around the feet, set the horizontal v ane to (A UTO) or the do wnward- blowing position. • When VANE CONTROL button is pressed again, the vane returns [...]

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 “ AM0:00 ” blinks at the current time display of TIME MONITOR, so set the current time corre[...]

EMERGENCY OPERA TION switch E.O. SW Operation mode COOL HEA T (MSZ) Set temperature 75 ° F 75 ° F F an speed Medium Medium Horizontal vane Auto Auto The operation mode is indicated by the Operation Indicator lamp on the indoor unit as following Operation indicator lamp (MSZ type) Press again <Heat> Press once <Cool> Press once again &[...]