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Mitsubishi MFZ-KA25VA manual

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Table of contents for the manual

  • Page 1

    CONTENTS 1.TECHNICAL CHANGES ·····································2 2. P ART NAMES AND FUNCTIONS ······················2 3. SPECIFICA TION ·················································4 4. NOISE CRITERIA CURVES ·············?[...]

  • Page 2

    2 1 TECHNICAL CHANGES 2 P ART NAMES AND FUNCTIONS INDOOR UNIT MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A Vertical vane Air outlet Horizontal vane Catechin air filter Display and operation section (When the front grille is opened) Remote controller Operation indicator lamp Emergency operation switch Air outlet selection switch Remote control receiving sect[...]

  • Page 3

    3 ACCESSORIES REMOTE CONTROLLER 1 2 3 4 5 6 7 8 9 0 1 2 3 Drain hose Remote controller holder Fixing screw for 2 3.5 o 1.6 mm (Black) Pipe cover Band Battery (AAA) for remote controller Indoor unit mounting bracket Fixing screw for 7 4 o 25 mm Wood screw for the indoor unit fixation Washer of 9 Felt tape (Used for left or left-rear piping) Wireless[...]

  • Page 4

    4 3 SPECIFICA TION Cooling 522 426/ 348/ 288 1,080 940/ 800/ 700 880 740/ 650/ 550 MFZ-KA35V A MFZ-KA25V A MFZ-KA50V A Indoor model Function Power supply Single phase 230V ,50Hz 10 0.2 25 — 54 0.2 RC0J30-GA RC0J30-HA 700 O 600 O 200 14 5 37 32/ 27/ 22 4 10 10 10 10 10 KM05G Heating 546 456/ 372/ 300 1,010 870/ 740/ 630 1,010 870/ 740/ 630 Air flo[...]

  • Page 5

    5 T3.15AL 250V 12V 300 " 12V 300 " 12V 300 " 12V 300 " ERZV14D471 Item Model Fuse Damper lock motor Right Damper lock motor Left Horizontal vane motor Damper motor V aristor MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A (F1 1) (ML1) (ML2) (MV1) (MV2) (NR1 1) Specifications and rating conditions of main electric parts Function Power supply[...]

  • Page 6

    6 4 NOISE CRITERIA CUR VES OCT A VE BAND SOUND PRESSURE LEVEL, 0dB = 20 µ Pa OCT A VE BAND SOUND PRESSURE LEVEL, 0dB = 20 µ Pa OCT A VE BAND SOUND PRESSURE LEVEL, 0dB = 20 µ Pa 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 BAND CENTER FREQUENCIES, Hz T est conditions, Cooling : Dry-bulb tempera[...]

  • Page 7

    7 OUTLINES AND DIMENSIONS 5 Unit : mm INDOOR UNIT 60 12 19 60 125 147 454 155 60 35 45 110 80 60 72 337 337 363 333 210 593 7 131 131 4- [ 6 Hole Indoor unit Installation plate 96 123 125 60 19 12 60 128 118 165 205 200 12 12 11 Gas pipe 25, 35: [ 9.52(flared)3/8 50: [ 12.7(flared)1/2 Liquid pipe [ 6.35(flared)1/4 drain Air in Air out Air out 46.5 [...]

  • Page 8

    8 6 WIRING DIAGRAM REFRIGERANT SYSTEM DIAGRAM 7 Indoor heat exchanger Flared connection Room temperature thermistor RT1 1 Indoor coil thermistor RT12, R T14, RT15 (main) RT13 (sub) Flared connection Refrigerant flow in cooling Refrigerant flow in heating Refrigerant pipe [ 9.52 (MFZ-KA25/35V A) Refrigerant pipe [ 12.7 (MFZ-KA50V A) (with heat insul[...]

  • Page 9

    9 PERFORMANCE CUR VES 8 Wet-and dry-bulb thermometers BACK VIEW OUTDOOR UNIT FRONT VIEW Wet and dry-bulb thermometers Indoor air Wet-bulb temperature difference ( : ) In doo r inta ke air W e t-b u lb te mpe rature ( : ) Outdoor intake air Dry-bulb temperature ( : ) Indoor intake air W et-bulb tem perature ( : ) Outdoor intake air Dry-bulb temperat[...]

  • Page 10

    10 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT 24.4 22.6 20.7 18.8 16.9 15.0 13.2 11.3 27.5 25.4 23.3 21.2 19.1 16.9 14.8 12.7 Indoor air Dry-bulb temperature difference ( : ) Indoor intake air Dry-bulb temperature ( : ) Outdoor intake air Wet-bulb temperature ( : ) Outdoor intake air Wet-bulb temperature ( : ) Indoor intake air Dry-bulb temperat[...]

  • Page 11

    11 Outdoor unit current(A) 32 18 Ambient temperature(˚C) Ambient humidity(%) SUZ-KA35V A.TH Outdoor unit current(A) Ambient temperature(˚C) Ambient humidity(%) SUZ-KA25V A.TH (MPa [Gauge]) 18 32 15 20 50 25 60 30 70 (%) 35(˚C) 0.2 0.4 0.6 0.8 1.0 1.2 57Hz 1.4 Ambient temperature(˚C) Ambient humidity(%) Outdoor low pressure SUZ-KA25V A.TH Outdoo[...]

  • Page 12

    12 21 18 2.94 1.41 0.48 464 2.81 1.35 0.48 487 2.70 1.30 0.48 510 2.60 1.25 0.48 534 21 20 3.06 1.10 0.36 487 2.94 1.06 0.36 516 2.85 1.03 0.36 528 2.75 0.99 0.36 551 22 18 2.94 1.53 0.52 464 2.81 1.46 0.52 487 2.70 1.40 0.52 510 2.60 1.35 0.52 534 22 20 3.06 1.23 0.40 487 2.94 1.18 0.40 516 2.85 1.14 0.40 528 2.75 1.10 0.40 551 22 22 3.19 0.89 0.2[...]

  • Page 13

    13 21 18 2.45 1.18 0.48 568 2.25 1.08 0.48 603 2.08 1.00 0.48 626 21 20 2.58 0.93 0.36 592 2.40 0.86 0.36 621 2.23 0.80 0.36 655 22 18 2.45 1.27 0.52 568 2.25 1.17 0.52 603 2.08 1.08 0.52 626 22 20 2.58 1.03 0.40 592 2.40 0.96 0.40 621 2.23 0.89 0.40 655 22 22 2.73 0.76 0.28 615 2.55 0.71 0.28 650 2.38 0.67 0.28 673 23 18 2.45 1.37 0.56 568 2.25 1.[...]

  • Page 14

    14 21 18 4.11 1.93 0.47 872 3.94 1.85 0.47 916 3.78 1.78 0.47 959 3.64 1.71 0.47 1003 21 20 4.29 1.50 0.35 916 4.11 1.44 0.35 970 3.99 1.40 0.35 992 3.85 1.35 0.35 1036 22 18 4.11 2.10 0.51 872 3.94 2.01 0.51 916 3.78 1.93 0.51 959 3.64 1.86 0.51 1003 22 20 4.29 1.67 0.39 916 4.11 1.60 0.39 970 3.99 1.56 0.39 992 3.85 1.50 0.39 1036 22 22 4.46 1.20[...]

  • Page 15

    15 21 18 3.43 1.61 0.47 1068 3.15 1.48 0.47 1134 2.91 1.37 0.47 1177 21 20 3.61 1.26 0.35 1112 3.36 1.18 0.35 1166 3.12 1.09 0.35 1232 22 18 3.43 1.75 0.51 1068 3.15 1.61 0.51 1134 2.91 1.48 0.51 1177 22 20 3.61 1.41 0.39 1112 3.36 1.31 0.39 1166 3.12 1.21 0.39 1232 22 22 3.82 1.03 0.27 1155 3.57 0.96 0.27 1221 3.33 0.90 0.27 1264 23 18 3.43 1.89 0[...]

  • Page 16

    16 21 18 5.64 2.54 0.45 1240 5.40 2.43 0.45 1302 5.18 2.33 0.45 1364 4.99 2.25 0.45 1426 21 20 5.88 1.94 0.33 1302 5.64 1.86 0.33 1380 5.47 1.81 0.33 1411 5.28 1.74 0.33 1473 22 18 5.64 2.76 0.49 1240 5.40 2.65 0.49 1302 5.18 2.54 0.49 1364 4.99 2.45 0.49 1426 22 20 5.88 2.18 0.37 1302 5.64 2.09 0.37 1380 5.47 2.02 0.37 1411 5.28 1.95 0.37 1473 22 [...]

  • Page 17

    17 21 18 4.70 2.12 0.45 1519 4.32 1.94 0.45 1612 3.98 1.79 0.45 1674 21 20 4.94 1.63 0.33 1581 4.61 1.52 0.33 1659 4.27 1.41 0.33 1752 22 18 4.70 2.30 0.49 1519 4.32 2.12 0.49 1612 3.98 1.95 0.49 1674 22 20 4.94 1.83 0.37 1581 4.61 1.70 0.37 1659 4.27 1.58 0.37 1752 22 22 5.23 1.31 0.25 1643 4.90 1.22 0.25 1736 4.56 1.14 0.25 1798 23 18 4.70 2.49 0[...]

  • Page 18

    18 INDOOR -10 Q INPUT -5 Q INPUT 0 Q INPUT 5 Q INPUT 10 Q INPUT 15 Q INPUT 20 Q INPUT 15 21 26 2.14 2.04 1.84 534 585 626 2.58 2.45 2.28 651 693 735 3.03 2.89 2.69 735 868 810 3.47 3.30 3.13 793 827 868 3.91 3.74 3.57 8.43 868 910 4.32 4.15 3.98 868 893 935 4.76 4.57 4.42 885 927 960 PERFORMANCE DATA HEATING operation MFZ-KA25VA/ SUZ-KA25VA.TH Rate[...]

  • Page 19

    19 SER VICE FUNCTIONS 9 9-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P .C. board. The time will be shortened as follows. (Refer to 10-7.) Set time : 1-minute ➔ 1-second Set time : 3-minute ➔ 3-second (It takes 3 minutes for the compressor to start operation. However , the[...]

  • Page 20

    20 NOTE: • The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller . • If main power is turned OFF or a power failure occurs while AUT O ST ART/STOP timer is active, the timer setting is cancelled. • If the unit has been off with the remote controller before power failure,[...]

  • Page 21

    21 TROUBLESHOOTING 10 10-1. 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 the following during servicing. 1) Before servicing the air conditioner , be sure to turn of f the unit first with the remote controller [...]

  • Page 22

    22 Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though OPERA TION INDICA TOR lamp indication listed on the troubleshooting check table (10-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality wh[...]

  • Page 23

    23 2. Indoor unit failure mode table NOTE: Blinking patterns of this mode differs from the ones of T roubleshooting check table (10-4.). 12-time flash 2.5-second OFF Replace the indoor electronic control P.C. board. Indoor control system When it cannot be read properly data in the nonvolatile memory of the indoor electronic control P.C. board. When[...]

  • Page 24

    24 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 1 Outdoor unit doesn't operate even in T est Run operation. w 1 Indoor unit operates, w[...]

  • Page 25

    25 NOTE : When the indoor unit has started operation and the above failures are detected (the first detection after the power ON), the indoor electronic control P .C. board turns OFF the indoor fan motor with OPERA TION INDICA TOR lamp flashing. No. 1 3 6 7 Symptom Operation indicator lamp Check point Countermeasure Left lamp flashes. 0.5-second ON[...]

  • Page 26

    26 10-5. T rouble judgement criteria of main parts MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A Part name Figure Check method and criteria Indoor fan motor (Upper) (MF1) Measure the resistance with a tester . (Part temperature 10˚C ~ 30˚C) Normal 8 k " ~ 20 k " Abnormal Open or short-circuit Room temperature thermistor (RT1 1) Indoor coil thermi[...]

  • Page 27

    27 -1. Check of indoor fan motor (upper) A When the left lamp of OPERA TION INDICA TOR lamp flashes 3 times and the right lamp of OPERA TION INDICA TOR lamp is not lighted. Indoor fan does not operate. CN21 1 Fuse (F1 1) IC101 T1 1 V ARISTOR (NR1 1) Indoor electronic control P .C. Board CN212 CN151 CN152 CN1X1 CN1Y1 C 111 R 111 w If more than 12 se[...]

  • Page 28

    28 -2. Check of indoor fan motor (lower) A When the left lamp of OPERA TION INDICA TOR lamp flashes 3 times and the right lamp of OPERA TION INDICA TOR lamp flashes ON and OFF every 0.5-second. Indoor fan does not operate. CN21 1 Fuse (F1 1) IC101 T1 1 V ARISTOR (NR1 1) Indoor electronic control P .C. Board CN212 CN151 CN152 CN1X1 CN1Y1 C 111 R 111[...]

  • Page 29

    29 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 10-1.4.) T urn on a radio to AM and press switch on the remote control[...]

  • Page 30

    30 The unit cannot be operated 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 f[...]

  • Page 31

    31 How to check mis-wiring and serial signal error D When the left lamp of OPERA TION INDICA TOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. Is there rated voltage of 230V AC in the power supply? In 3 minutes after turning ON the power supply of the outdoor unit, does the LED on the inverter P.C. board repeat quick b[...]

  • Page 32

    32 Check of damper E When the left lamp of OPERA TION INDICA TOR lamp flashes 15-time. Indoor unit and outdoor unit do not operate. T urn OFF the power supply . After performing the check, make sure to release the failure mode recall function. Remove the object. Ye s Ye s Ye s Is there anything that interferes the opening or closing movement of the[...]

  • Page 33

    33 Electromagnetic noise enters into TV sets or radios F No No No Yes Yes No No Yes Yes Yes Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m? Is the distance between the TV sets or radios and the indoor unit within 1m, or is the distance between the TV sets or[...]

  • Page 34

    34 Indoor coil thermistor [RT12,RT14,RT15 (MAIN), RT13 (SUB)] Room temperature thermistor (RT1 1) T emperature ( : ) Resistance (k " ) MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A Indoor electronic control P .C. board Release of Auto reset function Solder the Jumper wire to JR07. (Refer to 9-3.) 6 over 15V DC 5 3-6V DC 4 15V DC 3 1 305V DC 10-7. T est [...]

  • Page 35

    35 DISASSEMBL Y INSTRUCTIONS 11 (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 detache[...]

  • Page 36

    36 2. Removing the electronic control P .C. board and the display receiver P .C. board (1) Remove the panel. (Refer to 1.) (2) Remove the screw of the electrical cover , and then the electrical cover . (See Photo 3.) (3) Remove the screw of the ground wires under the electrical box, and then the ground wires. (See Photo 4.) (4) Remove the screw of [...]

  • Page 37

    37 OPERA TING PROCEDURE PHOTOS Photo 7 4. Removing the horizontal vane motor unit (1) Remove 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 horizontal vane motor unit. Photo 6 5. Removing the indoor fan motor (upper) ([...]

  • Page 38

    38 OPERA TING PROCEDURE PHOTOS Photo 1 1 Photo 13 Photo 10 Photo 12 Screws of the damper lock motor (Right) Screws of the damper motor Lead wires of the damper motor and the damper lock motor Screw of the damper motor support Screw of the motor band Screw of the ground wire Screws of the damper lock motor (Left) Screw of the damper motor support 6.[...]

  • Page 39

    39 P ARTS LIST (non-RoHS compliant) 12 MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A 12-1. INDOOR UNIT STRUCTURAL P ARTS No. Part No. Part name Remarks Symbol in Wiring Diagram Q'ty/unit 1 2 3 4 5 MFZ-KA25VA - MFZ-KA50VA - 6 7 REMOTE CONTROLLER FELT TAPE KM05G BOX ASSEMBL Y P ANEL ASSEMBL Y FRONT GRILLE CA TECHIN AIR FIL TER BACK PLA TE 1 1 1 1 1 1 1 1 [...]

  • Page 40

    40 12-3. INDOOR UNIT ELECTRICAL P ARTS AND FUNCTIONAL P ARTS MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A 1 2 3 4 5 6 7 14 15 12 19 16 18 24 21 23 22 8 9 12 13 10 11 17 25 26 20 18 15 P ARTS LIST (non-RoHS compliant) OB410A--2qxp 06.6.2 4:28 PM Page 40[...]

  • Page 41

    41 NOZZLE ASSEMBL Y (UPPER) HORIZONT AL V ANE (BACK) HORIZONT AL V ANE (FRONT) V ANE SLEEVE BEARING ASSEMBL Y NOZZLE ASSEMBL Y (LOWER) DAMPER MOTOR V ANE MOTOR SUPPORT SM SHAFT DAMPER LIMIT SWITCH (CLOSE) DAMPER LIMIT SWITCH (OPEN) DAMPER LOCK MOTOR DRAIN HOSE DAMPER LOCK SHAFT LINE FLOW F AN (LOWER) INDOOR F AN MOT OR ASSEMBL Y (LOWER) W MOTOR BAN[...]

  • Page 42

    42 MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A 5 12-4. INDOOR UNIT HEA T EXCHANGER 2 34 1 HAIR PIN COVER INDOOR HEA T EXCHANGER INDOOR HEA T EXCHANGER UNION (LIQ) UNION (GAS) UNION (GAS) W A TER COVER INDOOR COIL THERMIST OR INDOOR COIL THERMIST OR SET [ 6.35 [ 9.52 [ 12.7 3PCS/SET RT13 RT12,14,15 No. Part No. Part name Remarks Symbol in Wiring Diagram Q&a[...]

  • Page 43

    43 RoHS P ARTS LIST (RoHS compliant) 13 MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A 13-1. INDOOR UNIT STRUCTURAL P ARTS No. RoHS Part No. Part name Remarks Symbol in Wiring Diagram Q'ty/unit 1 2 3 4 5 G G G G G 25VA - 35VA - 50VA - 6 7 G G REMOTE CONTROLLER FELT TAPE KM05G BOX ASSEMBL Y P ANEL ASSEMBL Y FRONT GRILLE CA TECHIN AIR FIL TER BACK PLA TE 1[...]

  • Page 44

    44 13-3. INDOOR UNIT ELECTRICAL P ARTS AND FUNCTIONAL P ARTS MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A 1 2 3 4 5 6 7 14 15 12 19 16 18 24 21 23 22 8 9 12 13 10 11 17 25 26 20 18 15 RoHS P ARTS LIST (RoHS compliant) OB410A--2qxp 06.6.2 4:29 PM Page 44[...]

  • Page 45

    45 NOZZLE ASSEMBL Y (UPPER) HORIZONT AL V ANE (BACK) HORIZONT AL V ANE (FRONT) V ANE SLEEVE BEARING ASSEMBL Y NOZZLE ASSEMBL Y (LOWER) DAMPER MOTOR V ANE MOTOR SUPPORT SM SHAFT DAMPER LIMIT SWITCH (CLOSE) DAMPER LIMIT SWITCH (OPEN) DAMPER LOCK MOTOR DRAIN HOSE DAMPER LOCK SHAFT LINE FLOW F AN (LOWER) INDOOR F AN MOT OR ASSEMBL Y (LOWER) W MOTOR BAN[...]

  • Page 46

    46 MFZ-KA25V A MFZ-KA35V A MFZ-KA50V A 5 13-4. INDOOR UNIT HEA T EXCHANGER 2 34 1 HAIR PIN COVER INDOOR HEA T EXCHANGER INDOOR HEA T EXCHANGER UNION (LIQ) UNION (GAS) UNION (GAS) W A TER COVER INDOOR COIL THERMIST OR INDOOR COIL THERMIST OR SET [ 6.35 [ 9.52 [ 12.7 3PCS/SET RT13 RT12,14,15 No. Part No. RoHS Part name Remarks Symbol in Wiring Diagra[...]

  • Page 47

    47 OPTIONAL P ARTS 14 Model Part No. A1 A2 MAC-415FT -E MFZ-KA25V A- MFZ-KA25V A- MFZ-KA35V A- MFZ-KA35V A- MFZ-KA50V A- MFZ-KA50V A- A1 A2 A2 A1 Replacement of the air cleaning filter 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 lif[...]

  • Page 48

    HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAP AN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,L TD Distributed in Jun. 2006. No. OB410 REVISED EDITION-A 8 Distributed in May 2005. No. OB410 8 Made in Japan New publication, effective Jun. 2006 Specifications subject to change without notice. OB410A--2qxp 06.6.[...]