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Mitsubishi Electric MFZ-KA25VA air conditioner

1. MFZ KA35VA MFZ KA50VA z 9 5 15 35 15 15 5 5 z RJ B gm B 3 3 3 4 4 5 5 RT12 5 5 2 RT13 ONI12 CN211 CN2t2 RT14 5 s DB111 RT IE 181 1361 i5 S TB 3 230 est BIK 2 WHT 1 3 UN DOOR a 2 CN202 INDOOR ELECTRONIC CONNECTING 12 24 S3 RED E 10103 CONTROL P C BOARD RE e GRN SYMBOL NAME SYMBOL NAME DIODE STACK ML2 JDAMPER LOCK MOTOR LEFT RT14 INDOOR COIL THERMISTOR MAIN 2 FUSE T3 15AL250V 1 HORIZONTAL VANE MOTOR TH15 JINDOOR COIL THERMISTOR MAIN 3 DAMPER LIMIT SWITCH OPEN MV2 __ DAMPER MOTOR T11 TRANSFORMER DAMPER LIMIT SWITCH CLOSE NR11 VARISTOR UPPER INDOOR FAN MOTOR RT11 JROOM TEMPERATURE THERMISTOR LOWER INDOOR FAN MOTOR RT12 JINDOOR COIL THERMISTOR MAIN 1 DAMPER LOCK MOTOR RIGHT RT13 JINDOOR COIL THERMISTOR SUB NOTE 1 About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector 7 REFRIGERANT SYSTEM DIAGRAM MFZ KA25VA MFZ KA35VA MFZ KA50VA Unit mm INDOOR UNIT Refrigerant pipe 69 52 MFZ KA25 35VA INDOO
2. 12 4 INDOOR UNIT HEAT EXCHANGER Part No Part name Symbol in Wiring Diagram LN TRAR 25 fa HEA T UR LLL PLU UR UR PH 55524 A f HRA CT Q ty unit MFZ KA25VA MFZ KA35VA Ai MFZ KASQVA Remarks T2W A4T 638 HAIR PIN COVER 1 1 M21 EOW 620 INDOOR HEAT EXCHANGER 1 M21 E8W 620 INDOOR HEAT EXCHANGER M21 VL4 664 UNION LIQ 6 35 M21 NJ9 663 UNION GAS 9 52 M21 VL4 663 UNION GAS 12 7 T2W A4T 791 WATER COVER T2W AST 308 INDOOR COIL THERMISTOR RT13 T2W AAT 308 INDOOR COIL THERMISTOR SET RT12 14 15 42 3PCS SET 13 RoHS PARTS LIST RoHS compliant MFZ KA25VA MFZ KA35VA MFZ KA50VA 13 1 INDOOR UNIT STRUCTURAL PARTS 13 2 ACCESSORY AND REMOTE CONTROLLER Optional parts See 14 13 1 INDOOR UNIT STRUCTURAL PARTS Symbol Q ty unit Part No Part name in Wiring Remarks Diagram T2W L3V 234 BOX ASSEMBLY T2W L3V 000 PANEL ASSEMBLY T2W L3V 010 FRONT GRILLE M21 L3V 100 CATECHIN AIR FILTER T2W L3V 233 BACK PLATE RoHS 13 2 ACCESSORY AND REMOTE CONTROLLER Part number
3. INDOOR UNIT HEAT EXCHANGER Symbol Q ty unit Part No Part name in Wiring 2 Diagram a A1 A2 Remarks M21 L3V 638 JHAIR PIN COVER 1 1 M21 L3V 620 JINDOOR HEAT EXCHANGER 1 1 M21 L5V 620 JINDOOR HEAT EXCHANGER M21 L3V 664 JUNION LIQ 6 35 M21 L3V 663 JUNION GAS 99 52 21 L5V 663 JUNION GAS 12 7 M21 L3V 791 WATER COVER M21 L4V 305 INDOOR COIL THERMISTOR RT13 oolololololobvcol RoHS gt M21 L3V 305 INDOOR COIL THERMISTOR SET jRT12 14 15 46 3PCS SET 14 OPTIONAL PARTS 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 Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet Do not remove or attach AIR CLEANING FILTER during unit operation Model MFZ KA25VA MFZ KA25VA MFZ KA35VA MAC 415FT E MFZ KA35VA MFZ KASOVA MFZ KASOVA Replace
4. Display and operation section When the front grille is opened Air outlet selection switch ke J Operation indicator lamp 12 9 Emergency operation am NL ACCESSORIES MFZ KA25VA MFZ KA35VA MFZ KA50VA Drain hose 1 Remote controller holder 1 Fixing screw for 3 5 x 1 6 mm Black 2 Pipe cover 1 Band 2 Battery AAA for remote controller 2 Q Indoor unit mounting bracket 1 Fixing screw for 4 x 25 mm 5 Wood screw for the indoor unit fixation 4 Washer of 9 4 Felt tape Used for left or left rear piping 1 Wireless remote controller 1 B Air cleaning filter 1 MFZ KA25VA MFZ KA35VA MFZ KA50VA REMOTE CONTROLLER Signal transmitting section Operation display section ONOFF 90499 OPERATE STOP ON OFF button Temperature buttons Indication of remote controller model is on back Open the front lid N clock ON OFF wARM DCOSL 9 90 i save button FAN SPEED CONTROL button MODE FAN STOP OPERATION SELECT button Ts OFF TIMER button ECONO COOL VANE OSTAR ECONO COOL button Hte en ON TIMER button i save 8 gt TIME SET butto
5. Fan speed Super High 880 1 010 930 1 030 1 080 1 260 Fan speed High Med Low 740 650 550 870 740 630 770 680 570 890 740 650 940 820 740 1 070 930 850 Fan speed regulator 4 4 4 Thermistor RT11 at 25 C 10 10 10 Thermistor RT12 at 25 C 10 10 10 10 10 10 Thermistor RT14 at 25 C 10 10 10 Thermistor RT13 at 25 C Thermistor RT15 at 25 C 10 10 10 Remote controller model NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 C Outdoor Dry bulb temperature 35 C Wet bulb temperature 24 C Heating Indoor Dry bulb temperature 20 C Wet bulb temperature 15 C Outdoor Dry bulb temperature 7 C Wet bulb temperature 6 Refrigerant piping length one way 5m 1 Measured under rated operating frequency Outdoor model SUZ KA25VA TH Indoor model MFZ KA25VA SUZ KA35VA TH Indoor model MFZ KA35VA SUZ KA50VA TH Indoor model MFZ KA50VA Function Cooling Heating Cooling Heating Cooling Heating Power supply Single phase 230V 50Hz Single phase 230V 50Hz Single phase 230V 50Hz Capacity Rated frequency Min Max 2 5 0 9 3 4 3 4 0 9 5 1 3 5 0 9 3 9 4 0 0 9 6 2 4 8 0 9 5 4 6 0 0 9 7 9 Dehumidification 1 2 1 7 2 5 Capacity Air flow H
6. 11 NOTE For remodelling take out the bat teries and push the OPERATE STOP ON OFF button twice or 3 times at first After finish remodelling put back the batteries then press the RESET button The P C board has the print J1 and J2 Solder J1 and J2 according to the number of indoor unit as shown in Table 1 After modification press the RESET button Table 1 1 unit operation 2 units operation 3 units operation 4 units operation No 1 unit No modification Same as at left Same as at left Same as at left No 2 unit Solder J1 Same as at left Same as at left No 3 unit Solder J2 Same as at left No 4 unit Solder both J1 and J2 Tabl How to modify the electronic control P C board Turn OFF the power supply before modification Cut off JRO5 and JRO6 on the electronic control P C board according to the number of indoor unit as shown in Table 2 Refer to 10 7 e2 Indoor electronic control P C Board Fuse F11 H NOT JRO5 JRO6 JROSJAO VARISTOR 811 101010 No 1 unit No modification No modification No 2 unit Cut off JR05 No modification ohn VERE CN151 No 3 unit No modification Cut off JRO6 R111 citi Til C CN 11 No 4 unit Cut off JR05 Cut off JRO6 EIS ONIS E After modification turn ON the p
7. 1 16 0 31 1352 30 18 3 43 2 85 0 83 1068 3 15 2 61 0 83 1134 2 91 2 41 0 83 1177 30 20 3 61 2 56 0 71 1112 3 36 2 39 0 71 1166 3 12 2 21 0 71 1232 30 22 3 82 2 25 0 59 1155 3 57 2 11 0 59 1221 3 33 1 96 0 59 1264 30 24 4 03 1 89 0 47 1199 3 78 1 78 0 47 1254 3 57 1 68 0 47 1308 30 26 4 24 1 48 0 35 1243 3 99 1 40 0 35 1297 3 75 1 31 0 35 1352 31 18 3 43 2 98 0 87 1068 3 15 2 74 0 87 1134 2 91 2 53 0 87 1177 31 20 3 61 2 70 0 75 1112 3 36 2 52 0 75 1166 3 12 2 34 0 75 1232 31 22 3 82 2 40 0 63 1155 3 57 2 25 0 63 1221 3 33 2 09 0 63 1264 31 24 4 03 2 05 0 51 1199 3 78 1 93 0 51 1254 3 57 1 82 0 51 1308 31 26 4 24 1 65 0 39 1243 3 99 1 56 0 39 1297 3 75 1 46 0 39 1352 32 18 3 43 3 12 0 91 1068 3 15 2 87 0 91 1134 2 91 2 64 0 91 1177 32 20 3 61 2 85 0 79 1112 3 36 2 65 0 79 1166 3 12 2 46 0 79 1232 32 22 3 82 2 56 0 67 1155 3 57 2 39 0 67 1221 3 33 2 23 0 67 1264 32 24 4 03 2 21 0 55 1199 3 78 2 08 0 55 1254 3 57 1 96 0 55 1308 32 26 1 4 24 1 82 0 43 1243 3 99 1 72 0 43 1297 3 75 1 61 0 43 1352 NOTE Q Total capacity KW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible he
8. 1 27 0 27 992 4 52 1 22 0 27 1046 4 41 1 19 0 27 1079 4 27 1 15 0 27 1134 26 18 411 12 76 0 67 872 3 94 2 64 0 67 916 3 78 2 53 0 67 959 3 64 2 44 0 67 1003 26 20 4 29 2 36 0 55 916 4 11 2 26 0 55 970 3 99 2 19 0 55 992 3 85 2 12 0 55 1036 26 22 4 46 1 92 0 43 948 4 31 1 85 0 43 1008 4 20 1 81 0 43 1036 4 03 1 73 0 43 1079 26 24 4 69 1 45 0 31 992 4 52 1 40 0 31 1046 4 41 1 37 0 31 1079 4 27 1 32 0 31 1134 26 26 4 83 0 92 0 19 1046 4 69 0 89 0 19 1101 4 62 0 88 0 19 1134 4 48 0 85 0 19 1166 27 18 411 2 92 0 71 872 3 94 2 80 0 71 916 3 78 2 68 0 71 959 3 64 2 58 0 71 1003 27 20 4 29 2 53 0 59 916 4411 2 43 0 59 970 3 99 2 35 0 59 992 3 85 2 27 0 59 1036 27 22 4 46 2 101 0 47 948 4 31 2 02 0 47 1008 4 20 1 97 0 47 1036 4 03 1 89 0 47 1079 27 24 14 69 1 64 0 35 992 4 52 1 58 0 35 1046 4 41 1 54 0 35 1079 4 27 1 49 0 35 1134 27 26 4 83 1 11 0 23 1046 4 69 1 08 0 23 1101 4 62 1 06 0 23 1134 4 48 1 03 0 23 1166 28 18 411 3 08 0 75 872 3 94 2 95 0 75 916 3 78 2 84 0 75 959 3 64 2 73 0 75 1003 28 20 4 29 2 70 0 63 916 4 11 2 59 0 63 970 3 99 2 51 0 63 992 3 85 2 43 0 63 1036 28 22 4 46 2 28 0 51 948 4 31 2 20 0 51 1008 4 20 2 14 0 51 1036 4 03 2
9. 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 2 451 1 37 0 56 568 2 25 1 26 0 56 603 2 08 1 16 0 56 626 23 20 2 58 1 13 0 44 592 2 40 1 06 0 44 621 2 23 0 98 0 44 655 23 22 2 73 0 87 0 32 615 2 55 0 82 0 32 650 2 38 0 76 0 32 673 24 18 2 451 1 47 0 60 568 2 25 1 35 0 60 603 2 08 1 25 0 60 626 24 20 2 58 1 24 0 48 592 2 40 1 15 0 48 621 2 23 1 07 0 48 655 24 22 2 73 0 98 0 36 615 2 55 0 92 0 36 650 2 38 0 86 0 36 673 24 24 2 88 0 69 0 24 638 2 70 0 65 0 24 667 2 55 0 61 0 24 696 25 18 2 451 1 57 0 64 568 2 25 1 44 0 64 603 2 08 1 33 0 64 626 25 20 2 58 1 34 0 52 592 2 40 1 25 0 52 621 2 23 1 16 0 52 655 25 22 2 73 1 09 0 40 615 2 55 1 02 0 40 650 2 38 0 95 0 40 673 25 24 2 88 0 81 0 28 638 2 70 0 76 0 28 667 2 55 0 71 0 28 696 26 18 2 45 1 67 0 68 568 2 25 1 53 0 68 603 2 08 1 41 0 68 626 26 20 2 58 1 44 0 56 592 2 40 1 34 0 56 621 2 23 1 25 0 56 655 26 22 2 73 1 20 0 44 615 2 55 1 12 0 44 650 2 38 1 05 0 44 673 26 24 2 88 0 92 0 32 638 2 70 0 86 0 32 667 2 55 0 82 0 32 696 26 26 3 03 0 61 0 20 661 2 85 0 57 0 20 690 2 68 0 54 0 20 719 27 18 2 451 1 76 0 72 568 2 25 1 62 0 72 603 2 08 1 49 0 72 626 27 20 2 58 1 55 0 60 592 2 40 1 4
10. 75Hz SUZ KA50VA TH SUZ KA25VA TH SUZ KA35VA TH SUZ KA50VA TH MPa Gauge MPa Gauge MPa Gauge 1 4 1 4 1 4 e 2 9 0 2 30 32 35 C 30 32 35 C 15 1820 25 30 32 35 C 50 60 70 Ambient Ambient humidity Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity SUZ KA25VA TH SUZ KA35VA TH SUZ KA50VA TH lt 3 g c 5 5 8 8 8 5 5 5 6 6 1 5 3 0 4 5 15 1820 25 3032 35 C 15 1820 25 30 32 35 15 1820 25 3032 35 C 50 60 70 50 60 70 50 60 70 Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity HEATING operation Condition indoor Dry bulb temperature 20 0 C Wet bulb temperature 14 5 C Condition outdoor Dry bulb temperature 2 7 15 20 0 C Wet bulb temperature 1 6 12 14 5 C SUZ KA25VA TH SUZ KA35VA TH SUZ KA50VA TH lt lt 8 3 8 8 8 8 3 0 2 5 10 15 20 25 C 2 5 10 15 20 25 C Ambient temperature C Ambient temperature C Ambient temperature C 11 PERFORMANCE DATA COOLING operation Rated frequency 57Hz MFZ KA25VA SUZ KA25VA TH CAPACITY 2 5 kW SHF 0 66 INPUT 580 W OUTDOOR DB C INDOOR INDOOR 21 25 27 30 DB C WB C Q SHC S
11. 0 52 574 28 24 3 25 1 34 0 40 528 3 23 1 29 0 40 557 3 15 1 26 0 40 574 3 05 1 22 0 40 603 28 26 3 45 0 97 0 28 557 3 35 0 94 0 28 586 3 30 0 92 0 28 603 3 20 0 90 0 28 621 29 18 2 94 2 35 0 80 464 2 81 2 25 0 80 487 2 70 2 16 0 80 510 2 60 2 08 0 80 534 29 20 3 06 2 08 0 68 487 2 94 2 00 0 68 516 2 85 1 94 0 68 528 2 75 1 87 0 68 551 29 22 3 19 1 79 0 56 505 3 08 1 72 0 56 537 3 00 1 68 0 56 551 2 88 1 61 0 56 574 29 24 13 35 1 47 0 44 528 3 23 1 42 0 44 557 3 5 1 39 0 44 574 3 05 1 34 0 44 603 29 26 3 45 1 10 10 32 557 3 35 1 07 0 32 586 3 30 1 06 0 32 603 3 20 1 02 0 32 621 30 18 2 94 2 47 0 84 464 2 81 2 36 0 84 487 2 70 2 27 0 84 510 2 60 2 18 0 84 534 30 20 3 06 2 21 0 72 487 2 94 2 42 0 72 516 2 85 2 05 0 72 528 2 75 1 98 0 72 551 30 22 3 19 1 91 0 60 505 3 08 1 85 0 60 537 3 00 1 80 0 60 551 2 88 1 73 0 60 574 30 24 13 35 1 61 0 48 528 3 23 1 55 0 48 557 3 15 1 51 0 48 574 3 05 1 46 0 48 603 30 26 3 45 1 24 0 26 557 3 35 1 21 0 36 586 3 30 1 19 0 36 603 3 20 1 15 0 36 621 31 18 2 94 2 59 0 88 464 2 81 2 48 0 88 487 2 70 2 38 0 88 510 2 60 2 29 0 88 534 31 20 3 06 2 33 0 76 487 2 94 2 23 0 76 516 2 85 2 17 0 76 528 2 75 2 09 0 76 551 31 22 3 9 2 04 0 64 505 3 08 1 97 0 64 537 3 00 1 92 0 64 551
12. 1364 4 99 2 85 0 57 1426 24 20 5 88 2 65 0 45 1302 5 64 2 54 0 45 1380 5 47 2 46 0 45 1411 5 28 2 38 0 45 1473 24 22 6 12 2 02 0 33 1349 5 90 1 95 0 33 1434 5 76 1 90 0 33 1473 5 52 1 82 0 33 1535 24 24 6 43 1 35 0 21 1411 6 19 1 30 0 21 1488 6 05 1 27 0 21 1535 5 86 1 23 0 21 1612 25 18 5 64 3 44 0 61 1240 5 40 3 29 0 61 1302 5 18 3 16 0 61 1364 4 99 3 05 0 61 1426 25 20 5 88 2 88 0 49 1302 5 64 2 76 0 49 1380 5 47 2 68 0 49 1411 5 28 2 59 0 49 1473 25 22 6 12 2 26 0 37 1349 5 90 2 18 0 37 1434 5 76 2 13 0 37 1473 5 52 2 04 0 37 1535 25 24 6 43 1 611 0 25 1411 6 19 1 55 0 25 1488 6 05 1 51 0 25 1535 5 86 1 46 0 25 1612 26 18 5 64 3 67 0 65 1240 5 40 3 51 0 65 1302 5 18 3 37 0 65 1364 4 99 3 24 0 65 1426 26 20 5 881 3 12 0 53 1302 5 64 2 99 0 53 1380 5 47 2 90 0 53 1411 5 28 2 80 0 53 1473 26 22 16 12 2 51 0 41 1349 5 90 2 42 0 41 1434 5 76 2 36 0 41 1473 5 52 2 26 0 41 1535 26 24 6 43 1 87 0 29 1411 6 19 1 80 0 29 1488 6 05 1 75 0 29 1535 5 86 1 70 0 29 1612 26 26 6 62 1 13 10 17 1488 6 43 1 09 0 17 1566 6 34 1 08 0 17 1612 6 14 1 04 0 17 1659 27 18 5 64 3 89 0 69 1240 5 40 3 73 0 69 1302 5 18 3 58 0 69 1364
13. HEARING FOR CONTINUOUS NOISE HHH en 1 NC 20 00 8000 ate 63 125 250 500 1000 2000 4 BAND CENTER FREQUENCIES Hz OCTAVE BAND SOUND PRESSURE LEVEL 0dB HHHH Q 5 OUTLINES AND DIMENSIONS MFZ KA25VA Unit mm MFZ KA35VA MFZ KA50VA INDOOR UNIT 4 96 Hole Installation plate e 8 E Indoor unit y 700 46 5 607 46 5 gt N E 58 12 20000 337 357 E Airou fr J is A More than More than Air in 118 100mm 100mm gt 96 25 35 49 52 flared 3 8 S l sl 50 912 7 flared 1 2 i Liquid pipe 2 al 28 amp of NI 8 j gl D af 12 2 RE 54 508 137 60 10 45 35 8 80 80 155 454 gt 6 WIRING DIAGRAM
14. 1112 3 36 118 0 35 1166 3 12 1 09 0 35 1232 22 18 3 431 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 55 1068 3 15 1 73 0 55 1134 2 91 1 60 0 55 1177 23 20 3 61 1 55 0 43 1112 3 36 1 44 0 43 1166 3 12 1 34 0 43 1232 23 22 3 82 1 18 0 31 1155 3 57 1 11 0 31 1221 3 33 1 03 0 31 1264 24 18 3 43 2 02 0 59 1068 3 15 1 86 0 59 1134 2 91 1 71 0 59 1177 24 20 3 61 1 69 0 47 1112 3 36 1 58 O 47 1166 3 12 1 46 0 47 1232 24 22 3 82 1 34 0 35 1155 3 57 1 25 0 35 1221 3 33 1 16 0 35 1264 24 24 4 03 0 93 0 23 1199 3 78 0 87 0 23 1254 3 57 0 82 0 23 1308 25 18 3 43 2 16 0 63 1068 3 15 1 98 0 63 1134 2 91 1 83 0 63 1177 25 20 3 61 1 1 84 0 51 1112 3 36 1 71 0 51 1166 3 12 1 59 0 51 1232 25 22 3 82 1 49 0 39 1155 3 57 1 39 0 39 1221 3 33 1 30 0 39 1264 25 24 4 03 1 09 0 27 1199 3 78 1 02 0 27 1254 3 57 0 96 0 27 1308 26 18 3 43 2 30 0 67 1068 3 15 2 11 0 67 1134 2 91 1 95 0 67 1177 26 20 3 61 1 98 0 55 1112 3 36 1 85 0 55 1166 3 12 1 71 0 55 1232 26 22 3 82 1 64 0 43 1155 3 57 1 54 0 43 122
15. 2 05 0 45 1798 27 24 5 52 1 82 0 33 1705 5 18 1 71 0 33 1783 4 90 1 62 0 33 1860 27 26 5 81 1 22 0 21 1767 5 47 1 15 0 21 1845 5 14 1 08 0 21 1922 28 18 4 70 3 43 0 73 1519 4 32 3 15 0 73 1612 3 98 2 91 0 73 1674 28 20 4 94 3 02 0 61 1581 4 61 2 81 0 61 1659 4 27 2 61 0 61 1752 28 22 5 23 2 56 0 49 1643 4 90 2 40 0 49 1736 4 56 2 23 0 49 1798 28 24 5 52 2 04 0 37 1705 5 18 1 92 0 37 1783 4 90 1 81 0 37 1860 28 26 5 81 1 45 0 25 1767 5 47 1 37 0 25 1845 5 14 1 28 0 25 1922 29 18 4 70 3 62 0 77 1519 4 32 3 33 0 77 1612 3 98 3 07 0 77 1674 29 20 4 94 3 21 0 65 1581 4 61 3 00 0 65 1659 4 27 2 78 0 65 1752 29 22 5 23 2 77 0 53 1643 4 90 2 59 0 53 1736 4 56 2 42 0 53 1798 29 24 5 52 2 26 0 41 1705 5 18 2 13 0 41 1783 4 90 2 01 0 41 1860 29 26 5 81 1 68 0 29 1767 5 47 1 59 0 29 1845 5 14 1 49 0 29 1922 30 18 4 70 3 81 0 81 1519 4 32 3 50 0 81 1612 3 98 3 23 0 81 1674 30 20 4 94 3 41 0 69 1581 4 61 3 18 0 69 1659 4 27 2 95 0 69 1752 30 22 5 23 2 98 0 57 1643 4 90 2 79 0 57 1736 4 56 2 60 0 57 1798 30 24 5 52 2 48 0 45 1705 5 18 2 33 0 45 1783 4 90 2 20 0 45 1860 30 26 5 81 1 92 0 33 1767
16. 2 40 0 41 1612 29 26 6 62 1 92 0 29 1488 6 43 1 87 0 29 1566 6 34 1 84 0 29 1612 6 14 1 78 0 29 1659 30 18 5 64 4 57 0 81 1240 5 40 4 37 0 81 1302 5 18 4 20 0 81 1364 4 99 4 04 0 81 1426 30 20 5 88 4 06 0 69 1302 5 64 3 89 0 69 1380 5 47 3 78 0 69 1411 5 28 3 64 0 69 1473 30 22 6 12 3 49 0 57 1349 5 90 3 37 0 57 1434 5 76 3 28 0 57 1473 5 52 3 15 0 57 1535 30 24 6 43 2 89 0 45 1411 6 19 2 79 0 45 1488 6 05 2 72 0 45 1535 5 86 2 64 0 45 1612 30 26 6 62 2 19 0 33 1488 6 43 2 12 0 33 1566 6 34 2 09 0 33 1612 6 14 2 03 0 33 1659 31 18 5 64 4 79 0 85 1240 5 40 4 59 0 85 1302 5 18 4 41 0 85 1364 4 99 4 24 0 85 1426 31 20 5 88 4 29 0 73 1302 5 64 4 12 0 73 1380 5 47 3 99 0 73 1411 5 28 3 85 0 73 1473 31 22 6 12 3 73 0 61 1349 5 90 3 60 0 61 1434 5 76 3 51 0 61 1473 5 52 3 37 0 61 1535 31 24 6 43 3 15 0 49 1411 6 19 3 03 0 49 1488 6 05 2 96 0 49 1535 5 86 2 87 0 49 1612 31 26 6 62 2 45 0 37 1488 6 43 2 38 0 37 1566 6 34 2 34 0 37 1612 6 14 2 27 0 37 1659 32 18 5 64 5 02 0 89 1240 5 40 4 81 0 89 1302 5 18 4 61 0 89 1364 4 99 4 44 0 89 1426 32 20 5 88 4 53 0 77 1302 5 64 4 34 0 77 1380 5 47 4 21 0 77 1411
17. 2 88 1 84 0 64 574 31 24 3 25 1 74 0 52 528 3 23 1 68 0 52 557 3 15 1 64 0 52 574 3 05 1 59 0 52 603 31 26 13 45 1 38 0 40 557 3 35 1 34 0 40 586 3 30 1 32 0 40 603 3 20 1 28 0 40 621 32 18 2 94 2 70 0 92 464 2 81 2 59 0 92 487 270 2 48 0 92 510 12 60 2 39 0 92 534 32 20 3 06 2 45 0 80 487 2 94 2 35 0 80 516 2 85 2 28 0 80 528 2 75 2 20 0 80 551 32 22 3 19 2 17 0 68 505 3 08 2 09 0 68 537 3 00 2 04 0 68 551 2 88 1 96 0 68 574 32 24 13 35 1 88 0 56 528 3 23 1 81 0 56 557 3 5 1 76 0 56 574 3 05 1 71 0 56 603 32 26 3 45 1 52 0 44 557 3 35 1 47 0 44 586 3 30 1 45 0 44 603 3 20 1 41 0 44 621 NOTE Q Total capacity KW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity kW INPUT Total power input W 12 WB Wet bulb temperature PERFORMANCE DATA COOLING operation Rated frequency 57Hz MFZ KA25V A SUZ KA25VA TH CAPACITY 2 5 kW 0 66 INPUT 580 W OUTDOOR DB C INDOOR INDOOR 35 40 46 DB C WB C sHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 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
18. 29 1643 4 90 1 42 0 29 1736 4 56 1 32 0 29 1798 24 18 4 70 2 68 0 57 1519 4 32 2 46 0 57 1612 3 98 2 27 0 57 1674 24 20 4 94 2 22 0 45 1581 4 61 2 07 0 45 1659 4 27 1 92 0 45 1752 24 22 5 23 1 73 0 33 1643 4 90 1 62 0 33 1736 4 56 1 50 0 33 1798 24 24 5 52 1 16 0 21 1705 5 18 1 09 0 21 1783 4 90 1 03 0 21 1860 25 18 4 70 2 87 0 61 1519 4 32 2 64 0 61 1612 3 98 2 43 0 61 1674 25 20 4 94 2 42 0 49 1581 4 61 2 26 0 49 1659 4 27 2 09 0 49 1752 25 22 5 23 1 94 0 37 1643 4 90 1 81 0 37 1736 4 56 1 69 0 37 1798 25 24 5 52 1 38 0 25 1705 5 18 1 30 0 25 1783 4 90 1 22 0 25 1860 26 18 4 70 3 06 0 65 1519 4 32 2 81 0 65 1612 3 98 2 59 0 65 1674 26 20 4 94 2 62 0 53 1581 4 61 2 44 0 53 1659 4 27 2 26 0 53 1752 26 22 5 23 2 15 0 41 1643 4 90 2 01 0 41 1736 4 56 1 87 0 41 1798 26 24 5 52 1 60 0 29 1705 5 18 1 50 0 29 1783 4 90 1 42 0 29 1860 26 26 5 81 0 99 0 17 1767 5 47 0 93 0 17 1845 5 14 0 87 0 17 1922 27 18 4 70 3 25 0 69 1519 4 32 2 98 0 69 1612 3 98 2 75 0 69 1674 27 20 4 94 2 82 0 57 1581 4 61 2 63 0 57 1659 4 27 2 44 0 57 1752 27 22 5 23 2 35 0 45 1643 4 90 2 20 0 45 1736 4 56
19. 99 2 99 0 75 992 3 85 2 89 0 75 1036 31 22 4 46 2 81 0 63 948 4 31 2 71 0 63 1008 4 20 2 65 0 63 1036 4 03 2 54 0 63 1079 31 24 4 69 2 39 0 51 992 4 52 2 30 0 51 1046 4 41 2 25 0 51 1079 4 27 2 18 0 51 1134 31 26 4 83 1 88 0 39 1046 4 69 1 83 0 39 1101 4 62 1 80 0 39 1134 4 48 1 75 0 39 1166 32 18 1411 374 0 91 872 3 94 3 58 0 91 916 3 78 3 44 0 91 959 3 64 3 31 0 91 1003 32 20 4 29 3 39 0 79 916 411 3 25 0 79 970 3 99 3 15 0 79 992 3 85 3 04 0 79 1036 32 22 1446 2 99 0 67 948 4 31 2 88 0 67 1008 4 20 2 81 0 67 1036 4 03 2 70 0 67 1079 32 24 4 69 2 58 0 55 992 4 52 2 48 0 55 1046 4 41 2 43 0 55 1079 4 27 2 35 0 55 1134 32 26 4 83 2 08 0 43 1046 4 69 2 02 0 43 1101 4 62 1 99 0 43 1134 4 48 1 93 0 43 1166 NOTE Q Total capacity kW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity kW INPUT Total power input W 14 WB Wet bulb temperature PERFORMANCE DATA COOLING operation Rated frequency 77Hz MFZ KA35VA SUZ KA35VA TH CAPACITY 3 5 kW SHF 0 65 INPUT 1090 W OUTDOOR DB C INDOOR JINDOOR 35 40 46 Q SHC SHF INPUT Q ISHCISHF IINPUTI Q SHC ISHF INPUT 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
20. H B ROE i C o o ios 5 2 Emergency operation switch oA MENTA I Sage Horizontal vane motor CN151 i Ti a 3 po Damper lock motor Right CN151 EN EET asas Ir Damper motor CN152 Damper lock motor Left CN152 15V DC 96V Indoor fan iV DC motor Upper 305V DC CN211 1 iN DC Indoor fan DC motor Lower 212 JR05 JR06 GND DC 12VDC Modification point for individual operation Refer to 9 2 Indoor coil thermistor RT12 RT14 RT15 MAIN RT13 SUB Room temperature thermistor RT11 Resistance kQ 0 1020 30 40 50 60 Temperature 34 11 DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points gt 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 2 The terminal with this connector has the locking mechanism Slide the sleeve Hold the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector MFZ KA25VA MFZ KA35VA MFZ KASOVA INDOOR UNIT OPERATING PROCEDURE PHOTOS 1 Rem
21. as the power button of the remote controller is off To prevent breaker tripping due to the rush of starting current systematize other home appliance not to turn on at the same time When some air conditioners are connected to the same supply system if they are operated before power failure the starting current of all the compressors may flow simultaneously at restart 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 20 10 TROUBLESHOOTING MFZ KA25VA MFZ KA35VA MFZ KA50VA 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 Take care 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 confirming the horizontal vane is closed turn off the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 4 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wi
22. doesn t operate checked it can be checked with in Test Run operate normal EMERGENCY when failure mode recall function operation even in operation in JJOPERATION EMERGENCY xi Test Run COOL or Switch is pressed OPERATION operation HEAT mode Switch is pressed xi i x1 Test Run operation means the operation within 30 minutes after EMERGENCY OPERATION switch Check room Refer to Refer to Refer to 10 6 0 ee ee Ing wire Dieter p reek L aa Refer to 10 7 i compressor and receiver indoor unit a Si ti a Test point P C board 2 Refer to 10 6 diagram and Check of indoor electronic control voltage P C board and indoor i fan motor Left lamp Left lamp Left lamp Leftlamp Leftlamp Left lamp Left lamp Leftlamp Left lamp Flash on and off 2 time flash 3 time flash 4 time flash 5 time flash 6 time flash 7 time flash 14 time flash 15 time flash at0 5 second Cause Cause Cause Cause Cause Cause Cause Cause intervals Indoor unit Jindoorunit Indoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor uniti Indoor unit cae Trouble of Trouble of Trouble of Trouble of Oth Trouble of Indoor room temp 7 rouble o rouble of pe Outdoor Trouble of rouble o ther E rouble o Outdoor unit erature indoor fan indoor unit power thermistor outdoor abnormality damper Mis wiring
23. it ON again Press RESET button of the remote controller As for outdoor unit refer to outdoor unit service manual Y Repair the defective parts Deleting the abnormal memorized condition Y QAfter repairing the unit recall the failure mode again according to Setting up the failure mode recall function mentioned above Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 1 Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above Note1 Make sure to release the failure mode recall function once it s set up otherwise the unit cannot operate properly 2 1f the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized 2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 2 5 5 OFF second interval gt 5 5 OFF Second interval P gt A1 rLLrsr rrrsrL nrr lt 4 lt Beeps pa Beeps pa Beeps Repeated cycle Repeated cycle Repeated cycle 3 Blinking pattern when the outdoor unit is abnormal Blinking at 0 5 Blinking at 0 5 i second interval 25 OFF a 3 second ON second interval gt 25 second 3 s
24. radios and the outdoor unit the distance between the TV indoor unit or the TV outdoor unit within 3m the antennas damaged Is the coaxial cable damaged Replace or repair the antenna Yes Is there any poor contact in Replace or repair the coaxial cable the antenna wiring E Is the indoor outdoor Yes Extend the distance between connecting wire of the air the indoor outdoor connecting conditioner and the wiring of wire of the air conditioner and the antennas in close the wiring of the antennas Even if all of the above conditions is fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver 5 Electric field intensity of the broadcast station affected by the electromagnetic noise 6 Presence or absence of amplifier such as booster 7 Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OF
25. that is circled is not shown in the illustration 6 T2W A4T 426 REMOTE CONTROLLER 1 1 1 1 1 1 KM05G 1 1 7 G M21 L3V 256 FELT TAPE 1 1 1 1 43 RoHS PARTS LIST RoHS compliant 13 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MFZ KA25VA MFZ KA35VA MFZ KA50VA 44 RoHS PARTS LIST RoHS compliant 13 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration z o Part No Part name Symbol in Wiring Diagram Q ty unit MFZ KA 35VA gt N A1 A2 Remarks M21 L3V 235 NOZZLE ASSEMBLY UPPER M21 L4V 040 HORIZONTAL VANE BACK M21 L3V 040 HORIZONTAL VANE FRONT M21 L3V 071 VANE SLEEVE M21 L4V 504 BEARING ASSEMBLY M21 L4V 235 NOZZLE ASSEMBLY LOWER M21 L5V 306 DAMPER MOTOR UP amp DOWN M21 L3V 506 VANE MOTOR SUPPORT ONIO RAR QO N M21 L3V 049 SM SHAFT M21 L3V 047 DAMPER LIMIT SWITCH CLOSE M21 047 DAMPER LIMIT SWITCH OPEN M21 L4V 306 DAMPER LOCK MOTOR RIGHT amp LEFT M21 L3V 703 DRAIN HOSE M21 L3V 041 DAMPER M21 L4V 049 LOCK SHAFT M21 302 LINE FLOW FAN LOWER M21 300 INDOOR FAN MOTOR ASSEMBLY LOWER RCOJ30 M21 L3V 023 MOTOR BA
26. you Photo 4 Lamp cover from the electrical box and disconnect all the connectors on the electronic control P C board 10 Pull out the electronic control P C board from the electrical box Screw of the ground wires Screw of the electrical box 3 Removing the electrical box 1 Remove the panel Refer to 1 Indoor coil thermistor 2 Remove the electrical cover Refer to 2 connector CN113 3 Remove the ground wires from the electrical box Refer to 2 4 Remove the ground wires connected to the indoor fan motor and the ones connected to the indoor heat exchanger Refer to 2 5 Remove the screw of the electrical box See Photo 4 6 Disconnect the following connectors on the electronic control P C board See Photo 5 motor connectors lt 211 212 gt Horizontal vane motor connector lt 151 gt eDamper motor connector lt CN152 gt Display receiver P C board connectors lt 106 Display receiver P C board connector CN106 Display receiver P C board connector CN125 Horizontal vane motor connector CN151 Damper motor connector CN152 CN125 gt Fan motor Indoor coil thermistor connectors lt CN112 CN113 gt connector CN211 eRoom temperature thermistor connector lt CN111 gt Fan motor Damper limit switch connectors lt CN1X1 CN1Y1 gt connector CN212 7 Unhook the electrical box from the upper catch and pull out the electrical bo
27. 0 4 NC 70 80 I I i 50 i amp oe 1 70 70 f F 60 60 NC 60 LAA AA HH Hb HHH 50 50 LIU ALL i ER NC 50 40 PHA lt 3 T F i NC 40 30 30 NC 30 OCTAVE BAND SOUND PRESSURE LEVEL 0dB OCTAVE BAND SOUND PRESSURE LEVEL 0dB 20 APPROXIMATE 20 THRESHOLD OF t HEARING FOR a F F NC 20 HEARING FOR F NC 20 CONTINUOUS t 1 CONTINUOUS i i NOISE i i i 10 NOISE i 63 125 250 500 1000 200 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz MFZ KA50VA FAN SPEED FUNCTION SPL dB A LINE COOLING 43 oe HEATING 44 Super High Test conditions Cooling Dry bulb temperature 27C Wet bulb temperature 19 C Heating Dry bulb temperature 20C Wet bulb temperature 15 C 90 80 ALIA L 70 2 J NC 70 a s MICROPHONE NC 40 F H8HHHHHHHPHHHHHHHHHHHHHE INDOOR UNIT 60 50 WALL 40 30 NC 30 20 APPROXIMATE THRESHOLD OF
28. 0 40 505 3 08 1 23 0 40 537 3 00 1 20 10 40 551 2 88 1 15 0 40 574 25 2413 35 0 94 0 28 528 3 23 0 90 0 28 557 3 15 0 88 0 28 574 3 05 0 85 0 28 603 26 18 2 94 2 00 0 68 464 2 81 1 91 0 68 487 2 70 1 84 0 68 510 2 60 1 77 0 68 534 26 20 3 06 1 72 0 56 487 2 94 1 65 0 56 516 2 85 1 60 0 56 528 2 75 1 54 0 56 551 26 22 3 19 1 40 0 44 505 3 08 1 35 0 44 537 3 00 1 32 0 44 551 2 88 1 27 0 44 574 26 24 13 35 1 07 0 32 528 3 23 1 03 0 32 557 315 1 01 0 32 574 3 05 0 98 0 32 603 26 26 3 45 0 69 0 20 557 3 35 0 67 0 20 586 3 30 0 66 0 20 603 3 20 0 64 0 20 621 27 18 2 94 2 12 0 72 464 2 81 2 03 0 72 487 2 70 1 94 0 72 510 2 60 1 87 0 72 534 27 20 3 06 1 84 0 60 487 2 94 1 76 0 60 516 2 85 1 71 0 60 528 2 75 1 65 0 60 551 27 22 3 19 1 553 0 48 505 3 08 1 48 0 48 537 3 00 1 44 0 48 551 2 88 1 38 0 48 574 27 24 13 35 1 21 0 26 528 3 23 1 16 0 36 557 315 1 13 0 36 574 3 05 1 10 0 36 603 27 26 3 45 0 83 0 24 557 3 35 0 80 0 24 586 3 30 0 79 0 24 603 3 20 0 77 0 24 621 28 18 2 94 2 23 0 76 464 2 81 2 14 0 76 487 2 70 2 05 0 76 510 2 60 1 98 0 76 534 28 20 3 06 1 96 0 64 487 2 94 1 88 0 64 516 2 85 1 82 0 64 528 2 75 1 76 0 64 551 28 22 3 19 1 66 0 52 505 3 08 1 60 0 52 537 3 00 1 56 0 52 551 2 88 1 50
29. 05 0 51 1079 28 24 4 69 1 83 0 39 992 4 52 1 76 0 39 1046 4 41 1 72 0 39 1079 4 27 1 67 0 39 1134 28 26 4 83 1 30 0 27 1046 4 69 1 27 0 27 1101 4 62 1 25 0 27 1134 4 48 1 21 0 27 1166 29 18 411 13 25 0 79 872 3 94 3 11 0 79 916 3 78 2 99 0 79 959 3 64 2 88 0 79 1003 29 20 4 29 2 87 0 67 916 411 2 76 0 67 970 3 99 2 67 0 67 992 3 85 2 58 0 67 1036 29 22 4 46 2 45 0 55 948 4 31 2 37 0 55 1008 4 20 2 31 0 55 1036 4 03 2 21 0 55 1079 29 24 4 69 2 02 0 43 992 4 52 1 94 0 43 1046 4 41 1 90 0 43 1079 4 27 1 84 0 43 1134 29 26 4 83 1 50 0 31 1046 4 69 1 45 0 31 1101 4 62 1 43 0 31 1134 4 48 1 39 0 31 1166 30 18 4411 13 41 0 83 872 3 94 3 27 0 83 916 3 78 3 14 0 83 959 3 64 3 02 0 83 1003 30 20 4 29 3 04 0 71 916 411 2 92 0 71 970 3 99 2 83 0 71 992 3 85 2 73 0 71 1036 30 22 4 46 2 63 0 59 948 4 31 2 54 0 59 1008 4 20 2 48 0 59 1036 4 03 2 37 0 59 1079 30 24 4 69 2 20 0 47 992 4 52 2 12 0 47 1046 4 41 2 07 0 47 1079 4 27 2 01 0 47 1134 30 26 4 83 1 69 0 35 1046 4 69 1 64 0 35 1101 4 62 1 62 0 35 1134 4 48 1 57 0 35 1166 31 18 4411 3 58 0 87 872 3 94 3 43 0 87 916 3 78 3 29 0 87 959 3 64 3 17 0 87 1003 31 20 4 29 3 22 0 75 916 4 11 3 08 0 75 970 3
30. 060 0 5 second OFF Indoor unit and outdoor unit do not operate When the serial signal from the outdoor unit is not received for a maximum of 6 minutes Refer to 10 6 0 How to check mis wiring and serial signal error Outdoor control System wi e Left lamp lights up Outdoor unit does not operate When it cannot properly read data in the nonvolatile memory of the inverter P C board or of the outdoor electronic control P C board Check the blinking pattern of the LED on the inverter P C board or the outdoor electronic control P C board Indoor coil thermistor Room tempera ture thermistor Left lamp flashes 2 time flash PA ATA 0000080800 2 5 second OFF Indoor unit and outdoor unit do not operate When the indoor coil or the room temperature thermistor is shorts or opens circuit Refer to the characteristics of indoor coil thermistor and the roomtemperature thermistor on 10 7 Indoor fan motor Left lamp flashes 3 time flash sososoooooso L 1 x osooo No CEN of TA 2 5 second OFF Indoor unit and outdoor unit do not operate When the rotational frequency feedback signal is not emitted during the indoor fan operation Refer to 10 6 1 2 Check of indoor fan motor Indoor control system Left lamp flashes 4 time flash sosososooooosososos b px 2 5 second OFF Indoor
31. 1 3 33 1 43 0 43 1264 26 24 4 03 1 25 0 31 1199 3 78 1 17 0 31 1254 3 57 1 11 0 31 1308 26 26 4 24 0 80 0 19 1243 3 99 0 76 0 19 1297 3 75 0 71 0 19 1352 27 18 3 43 2 44 0 71 1068 3 15 2 24 0 71 1134 2 91 2 06 0 71 1177 27 20 3 61 2 13 0 59 1112 3 36 1 98 0 59 1166 3 12 1 84 0 59 1232 27 22 3 82 1 79 0 47 1155 3 57 1 68 0 47 1221 3 33 1 56 0 47 1264 27 24 4 03 1 41 0 35 1199 3 78 1 32 0 35 1254 3 57 1 25 0 35 1308 27 26 4 24 0 97 0 23 1243 3 99 0 92 0 23 1297 3 75 0 86 0 23 1352 28 18 3 43 2 57 0 75 1068 3 15 2 36 0 75 1134 2 91 2 18 0 75 1177 28 20 3 61 2 27 0 63 1112 3 36 2 12 0 63 1166 3 12 1 96 0 63 1232 28 22 3 82 1 95 0 51 1155 3 57 1 82 0 51 1221 3 33 1 70 0 51 1264 28 24 4 03 1 57 0 39 1199 3 78 1 47 0 39 1254 3 57 1 39 0 39 1308 28 26 4 24 1 14 0 27 1243 3 99 1 08 0 27 1297 3 75 1 01 0 27 1352 29 18 3 43 2 71 0 79 1068 3 15 2 49 0 79 1134 2 91 2 29 0 79 1177 29 20 3 61 2 42 0 67 1112 3 36 2 25 0 67 1166 3 12 2 09 0 67 1232 29 22 3 82 2 10 0 55 1155 3 57 1 96 0 55 1221 3 33 1 83 0 55 1264 29 24 4 03 1 73 0 43 1199 3 78 1 63 0 43 1254 3 57 1 54 0 43 1308 29 26 4 24 1 31 0 31 1243 3 99 1 24 0 31 1297 3 75
32. 1003 21 20 4 29 1 50 10 35 916 4 11 1 44 0 35 970 13 9911 4010 351 992 3 85 1 35 0 35 1036 22 18 411 2 10 0 51 872 3 941 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 39 916 411 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 0 27 948 4 31 1 16 0 27 1008 4 20 1 13 0 27 1036 4 03 1 09 0 27 1079 23 18 411 12 26 0 55 872 3 94 2 17 0 55 916 3 78 2 08 0 55 959 3 64 2 00 0 55 1003 23 20 4 29 1 84 0 43 916 4111 1 771 0 43 970 3 99 1 72 0 43 992 3 85 1 66 0 43 1036 23 22 4 46 1 38 10 31 948 4 31 1 33 0 31 1008 4 20 1 30 0 31 1036 4 03 1 25 0 31 1079 24 18 411 12 43 0 59 872 3 94 2 32 0 59 916 3 78 2 23 0 59 959 3 64 2 15 0 59 1003 24 20 4 29 2 021 0 47 916 4111 1 93 0 47 970 13 99 1 88 0 47 992 3 85 1 81 0 47 1036 24 22 4 46 1 56 0 35 948 4 31 1 51 0 35 1008 4 20 1 47 0 35 1036 4 03 1 41 0 35 1079 24 24 4 69 1 08 0 23 992 4 52 1 04 0 23 1046 4 41 1 01 0 23 1079 4 27 0 98 0 23 1134 25 18 411 2 59 0 63 872 3 94 2 48 0 63 916 3 78 2 38 0 63 959 3 64 2 29 0 63 1003 25 20 4 29 219 0 51 916 4111 2 101 0 51 970 13 99 2 03 0 51 992 3 85 1 96 0 51 1036 25 22 4 46 1 74 0 39 948 4 31 1 68 0 39 1008 4 20 1 64 0 39 1036 4 03 1 57 0 39 1079 25 24 4 69
33. 25 Thermistor RT62 at 100 C Thermistor RT64 at 50 C Thermistor RT65 at 25 C Thermistor RT68 at 25 C NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 C Outdoor Drv bulb temperature 35 C Wet bulb temperature 24 C Heating Indoor Dry bulb temperature 20 C Wet bulb temperature 15 C Outdoor Dry bulb temperature 7 C Wet bulb temperature 6 Refrigerant piping length one way 5m 1 Measured under rated operating frequency Specifications and rating conditions of main electric parts Item MFZ KA25VA MFZ KA35VA MFZ KASOVA Fuse T3 15AL 250V 12V 3000 12V 3000 Damper lock motor Right Damper lock motor Left Horizontal vane motor 12V 3000 Damper motor 12V 3000 Varistor ERZV14D471 4 NOISE CRITERIA CURVES MFZ KA25VA MFZ KA35VA FAN SPEED FUNCTION SPL dB A LINE FAN SPEED FUNCTION SPL dB A LINE COOLING 37 ee COOLING 38 oe Super High Super High HEATING 37 O HEATING 38 0 0 Test conditions Test conditions Cooling Dry bulb temperature 27C Wet bulb temperature 19 C Cooling Dry bulb temperature 27C Wet bulb temperature 19 C Heating Dry bulb temperature 20C Wet bulb temperature 15 C oo Dry bulb temperature 20C Wet bulb temperature 15 C NC 7
34. 4 0 60 621 2 23 1 34 0 60 655 27 22 27311 31 0 48 615 2 55 1 22 0 48 650 2 38 1 14 0 48 673 27 24 2 88 1 04 0 36 638 2 70 0 97 0 36 667 2 55 0 92 0 36 696 27 26 3 03 0 73 0 24 661 2 85 0 68 0 24 690 2 68 0 64 0 24 719 28 18 2 45 1 86 0 76 568 2 25 1 71 0 76 603 2 08 1 58 0 76 626 28 20 2 58 1 65 0 64 592 2 40 1 54 0 64 621 2 23 1 42 0 64 655 28 22 2 73 1 42 0 52 615 2 55 1 33 0 52 650 2 38 1 24 0 52 673 28 24 2 88 1 15 0 40 638 2 70 1 08 0 40 667 2 55 1 02 0 40 696 28 26 3 03 0 85 0 28 661 2 85 0 80 0 28 690 2 68 0 75 0 28 719 29 18 2 45 1 96 0 80 568 2 25 1 80 0 80 603 2 08 1 66 0 80 626 29 20 2 58 1 75 0 68 592 2 40 1 63 0 68 621 2 23 1 51 0 68 655 29 22 27311 53 0 56 615 2 55 1 43 0 56 650 2 38 1 33 0 56 673 29 24 2 88 1 27 0 44 638 2 70 1 19 0 44 667 2 55 1 12 0 44 696 29 26 3 03 0 97 0 32 661 2 85 0 91 0 32 690 2 68 0 86 0 32 719 30 18 2 45 2 06 0 84 568 2 25 1 89 0 84 603 2 08 1 74 0 84 626 30 20 2 58 1 85 0 72 592 2 40 1 73 0 72 621 2 23 1 60 0 72 655 30 22 2 73 1 64 0 60 615 2 55 1 53 0 60 650 2 38 1 43 0 60 673 30 24 2 88 1 38 0 48 638 2 70 1 30 0 48 667 2 55 1 22 0 48 696 30 26 3 03 1 09 0 36 661 2 85 1 03 0 36 690 2 68 0 96 0 36 719 31 18 2 45 2 16 0
35. 4 99 3 44 0 69 1426 27 20 5 88 3 35 0 57 1302 5 64 3 21 0 57 1380 5 47 3 12 0 57 1411 5 28 3 01 0 57 1473 27 22 16 12 2 75 0 45 1349 5 90 2 66 0 45 1434 5 76 2 59 0 45 1473 5 52 2 48 0 45 1535 27 24 6 43 2 12 0 33 1411 6 19 2 04 0 33 1488 6 05 2 00 0 33 1535 5 86 1 93 0 33 1612 27 26 6 62 1 39 0 21 1488 6 43 1 35 0 21 1566 6 34 1 33 0 21 1612 6 14 1 29 0 21 1659 28 18 5 64 412 0 73 1240 5 40 3 94 0 73 1302 5 18 3 78 0 73 1364 4 99 3 64 0 73 1426 28 20 5 88 3 59 0 61 1302 5 64 3 44 0 61 1380 5 47 3 34 0 614 1411 5 28 3 22 0 61 1473 28 22 6 12 3 00 0 49 1349 5 90 2 89 0 49 1434 5 76 2 82 0 49 1473 5 52 2 70 0 49 1535 28 24 6 43 2 38 0 37 1411 6 19 2 29 0 37 1488 6 05 2 24 0 37 1535 5 86 2 17 0 37 1612 28 26 6 62 1 66 0 25 1488 6 43 1 61 0 25 1566 6 34 1 58 0 25 1612 6 14 1 54 0 25 1659 29 18 5 64 4 34 0 77 1240 5 40 4 16 0 77 1302 5 18 3 99 0 77 1364 4 99 3 84 0 77 1426 29 20 5 88 3 82 0 65 1302 5 64 3 67 0 65 1380 5 47 3 56 0 65 1411 5 28 3 43 0 65 1473 29 22 6 12 3 24 0 53 1349 5 90 3 13 0 53 1434 5 76 3 05 0 53 1473 5 52 2 93 0 53 1535 29 24 6 43 2 641 0 41 1411 6 19 2 54 0 41 1488 6 05 2 48 0 41 1535 5 86
36. 5 28 4 07 0 77 1473 32 22 6 12 3 98 0 65 1349 5 90 3 84 0 65 1434 5 76 3 74 0 65 1473 5 52 3 59 0 65 1535 32 24 6 43 3 41 0 53 1411 6 19 3 28 0 53 1488 6 05 3 21 0 53 1535 5 86 3 10 0 53 1612 32 26 6 62 2 72 0 41 1488 6 43 2 64 0 41 1566 6 34 2 60 0 41 1612 6 14 2 52 0 41 1659 NOTE Q Total capacity kW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity kW INPUT Total power input W 16 WB Wet bulb temperature PERFORMANCE DATA COOLING operation Rated frequency 75Hz MFZ KASOVA SUZ KA50VA TH CAPACITY 4 8 kW 0 63 INPUT 1550 W OUTDOOR DB C INDOORJINDOOR 35 40 46 DB C WB C Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 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 53 1519 4 32 2 29 0 53 1612 3 98 2 11 0 53 1674 23 20 4 94 2 03 0 41 1581 4 61 1 89 0 41 1659 4 27 1 75 0 41 1752 23 22 5 23 1 52 0
37. 5 47 1 81 0 33 1845 5 14 1 69 0 33 1922 31 18 4 70 4 00 0 85 1519 4 32 3 67 0 85 1612 3 98 3 39 0 85 1674 31 20 4 94 3 61 0 73 1581 4 61 3 36 0 73 1659 4 27 3 12 0 73 1752 31 22 5 23 3 19 0 61 1643 4 90 2 99 0 61 1736 4 56 2 78 0 61 1798 31 24 5 52 2 70 0 49 1705 5 18 2 54 0 49 1783 4 90 2 40 0 49 1860 31 26 5 81 2 15 0 37 1767 5 47 2 02 0 37 1845 5 14 1 90 0 37 1922 32 18 4 701 4 19 0 89 1519 4 32 3 84 0 89 1612 3 98 3 55 0 89 1674 32 20 4 94 3 81 0 77 1581 4 61 3 55 0 77 1659 4 27 3 29 0 77 1752 32 22 5 23 3 40 0 65 1643 4 90 3 18 0 65 1736 4 56 2 96 0 65 1798 32 24 5 52 2 93 0 53 1705 5 18 2 75 0 53 1783 4 90 2 59 0 53 1860 32 26 5 81 2 38 0 41 1767 5 47 2 24 0 41 1845 5 14 2 11 0 41 1922 NOTE Q Total capacity kW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity kW INPUT Total power input W WB Wet bulb temperature 17 PERFORMANCE DATA HEATING operation MFZ KA25VA SUZ KA25VA TH Rated frequency 80Hz CAPACITY 3 4 KW INPUT 835 W OUTDOOR WB C 0 5 10 INPUT INPUT Q 735 793 868 827 810 868 MFZ KA35VA SUZ KA35VA TH Rated frequency 74Hz C
38. 88 568 2 25 1 98 0 88 603 2 08 1 83 0 88 626 31 20 2 58 1 96 0 76 592 2 40 1 82 0 76 621 2 23 1 69 0 76 655 31 22 2 731 1 74 0 64 615 2 55 1 63 0 64 650 2 38 1 52 0 64 673 31 24 2 88 1 50 0 52 638 2 70 1 40 0 52 667 2 55 1 33 0 52 696 31 26 3 03 1 21 0 40 661 2 85 1 14 0 40 690 2 68 1 07 0 40 719 32 18 2 45 2 25 0 92 568 2 25 2 07 0 92 603 2 08 1 91 0 92 626 32 20 2 58 2 06 0 80 592 2 40 1 92 0 80 621 2 23 1 78 0 80 655 32 22 2 73 1 85 0 68 615 2 55 1 73 0 68 650 2 38 1 62 0 68 673 32 24 2 88 1 61 0 56 638 2 70 1 51 0 56 667 2 55 1 43 0 56 696 32 26 3 03 1 33 0 44 661 2 85 1 25 0 44 690 2 68 1 18 0 44 719 NOTE Q Total capacity kW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity kW INPUT Total power input W WB Wet bulb temperature 13 PERFORMANCE DATA COOLING operation Rated frequency 77Hz MFZ KA35VA SUZ KA35VA TH CAPACITY 3 5 kW 0 65 INPUT 1090 W OUTDOOR DB C INDOOR INDOOR 21 25 27 30 DB C WB C SHC SHF INPUT sHC sHF INPUT sHC sHF INPUT IsHCI INPUT 21 18 1411 1 93 0 47 872 3 94 1 85 0 47 916 3 78 1 78 0 47 959 3 64 1 71 10 47
39. 92 62 86 10 4 1 2 26 1 2 22 29 2 26 24 20 U 856 5 6 7 8 9 3 9 1 1 24 g 1 1 18 o gt Ing S 50 70 83 8 70 intakes 8 10 store C Fi ir Wet buip 22 2 bulb tempe 8 45 62 74 U o9 tempe 20 09 air We Idi 18 igor 27 30 35 40 4546 27 30 35 40 4546 I f ri l Es ER Outdoor intake air Dry bulb temperature Outdoor intake air Drv bulb temperature adP adP S 229229592959 2 91 0 5 1010 5 889899449 531332 522 228 Heating capacity Total input heating e 24 4 27 5 33 0 1 3 15 1 3 5 20 5 CY 26 22 6 25 4 30 4 gaa wes 1 2 erature C Fa 20 7 23 3 4 27 9 11 d v ad 20 A 15 ae 18 8 212 254 510 P dt Have S pirtee 50 9 D 2 9 F zE 85 169 4 19 1 228 09 29 412217 EE 8 we ME AE 15 0 16 9 4 20 3 208 o et fet 8 i rs 1271 4 u 5 13 2 14 8 17 8 8 07 5121 05 Pa o 7 11 3 12 7 15 2 0 6 17 0 6 Sl 10 5 0 5 10 15 10 5 0 5 10 15 r amp r Outdoor intake air Wet bulb temperature Outdoor intake air Wet bulb temper
40. APACITY 4 0 kW INPUT 1100 W OUTDOOR WB C 0 5 10 INPUT Q INPUT Q 968 1045 1012 1089 1067 1144 MFZ KASOVA SUZ KA50VA TH Rated frequency 79Hz CAPACITY 6 0 kW INPUT 1860 W OUTDOOR WB C 0 5 10 INPUT Q INPUT Q 1637 1767 1711 1841 1804 1934 NOTE Q Total capacity kW INPUT Total power input W DB Drv bulb temperature WB Wet bulb temperature 18 9 SERVICE FUNCTIONS MFZ KA25VA MFZ KA35VA MFZ KA50VA 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 9 1 second Set time 3 minute gt 3 second It takes 3 minutes for the compressor to start operation However the starting time is shortened by short circuit of JPG and JPS 9 2 P C BOARD MODIFICATION FOR INDIVIDUAL OPERATION 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 both the P C boards of remote controller and the electronic control P C boards must be modified according to the number of the indoor unit How to modify the remote controller P C board Remove batteries before modification The board has a print as shown below Remote controller model KM05G f
41. F the power supply once and then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and check for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the electromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise After checking the above consult the service representative 33 10 7 Test point diagram and voltage MFZ KA25VA MFZ KA35VA MFZ KA50VA Indoor electronic control P C board Room temperature thermistor RT11 FUSE F11 3 15A 250V Power supply input 230V AC Indoor coil thermistor RT14 MAIN 2 Indoor coil thermistor RT13 SUB Indoor coil thermistor RT12 MAIN 1 mil Pf Release of Auto reset function Solder the Jumper wire to JRO7 Refer to 9 3 quA Timer short mode point i JPG JPS Refer to 9 1 Varistor 3 22929 ore elses NR11 4 I x Display receiver board 1FAN 2FAN Emergency change switch operation switch En i 3 vi pi G o 4M S A zoem sees CAUTION mmu
42. HF INPUT Q SHC SHF INPUT Q SHC INPUT Q SHC INPUT 21 18 2 941 1 41 0 48 464 2 81 1 35 0 48 487 27011 30 0 48 510 2 60 1 25 0 48 534 21 20 13 0611 1010 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 28 505 3 08 0 86 0 28 537 3 00 0 84 0 28 551 2 88 0 81 0 28 574 23 18 2 941 1 65 0 56 464 2 81 1 58 0 56 487 2 70 1 51 0 56 510 2 60 1 46 0 56 534 23 20 3 06 1 35 0 44 487 2 94 1 29 0 44 516 2 85 1 25 0 44 528 2 75 1 21 0 44 551 23 22 13 19 1 02 0 32 505 3 08 0 98 0 32 537 3 00 0 96 0 32 551 2 88 0 92 0 32 574 24 18 2 94 1 76 0 60 464 2 81 1 69 0 60 487 27011 62 0 60 510 2 60 1 56 0 60 534 24 20 3 06 1 47 0 48 487 2 94 1 41 0 48 516 2 85 1 37 0 48 528 2 75 1 32 0 48 551 24 22 319 1 15 0 36 505 3 08 1 11 0 36 537 3 00 1 08 0 36 551 2 88 1 04 0 36 574 24 24 3 25 0 80 0 24 528 3 23 0 77 0 24 557 3 15 0 76 0 24 574 3 05 0 73 0 24 603 25 18 2 94 1 88 0 64 464 2 81 1 80 0 64 487 2 70 1 73 0 64 510 2 60 1 66 0 64 534 25 20 3 06 1 59 0 52 487 2 94 1 53 0 52 516 2 85 1 48 0 52 528 2 75 1 43 0 52 551 25 22 319 1 28
43. IR CONDITIONER OUTDOOR UNIT MXZ series Multi system air conditioner can connect two or more indoor units with one outdoor unit Unit won t operate in case the total capacity of indoor units exceeds the capacity of outdoor units Do not connect indoor units beyond the outdoor unit capacity Operation indicator lamp flashes as shown in the figure below eWhen you try to operate two or more indoor units with one outdoor unit simultaneously one for the cooling and the other for heating the operation mode of the indoor unit that operates earlier is selected The other indoor units will start the operation later cannot operate indicating as shown in the figure below In this case please set all the indoor units to the same operation mode OPERATION INDICATOR Vly vy 29 SEX Blinki YO Blinkin i AM AS g green Standby for normal operation Apc CES Xo Blinking Green or Orange 0 Blinking orange Standby for i save operation Not lighted When indoor units start operation while the defrosting of outdoor unit is being done it takes a few minutes max 10 minutes to blow out the warm air heating operation even though the indoor unit is not in operation the room may get warm or the sound of refriger ant flowing may be heard This is not a malfunction The refrigerant continuously into it causes this Lighted Green 21 10 2 Failure mode recall function Outline of the function This air conditioner can
44. LER Optional parts See 14 12 1 INDOOR UNIT STRUCTURAL PARTS Symbol Q ty unit Part No Part name in Wiring Diagram MFZ KA25VA 7 MFZ KA35VA Tar MFZ KASOVA Remarks M21 E0W 234 BOX ASSEMBLY T2W 000 PANEL ASSEMBLY T2W 010 FRONT GRILLE T2W A4T 100 CATECHIN AIR FILTER T2W A4T 233 BACK PLATE 12 2 ACCESSORY AND REMOTE CONTROLLER Part number that is circled is not shown in the illustration 6 T2W A4T 426 REMOTE CONTROLLER 1 1 1 KM05G 1 7 M21 HL5 256 FELT TAPE 1 1 39 PARTS LIST non RoHS compliant 12 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MFZ KA25VA MFZ KA35VA MFZ KA50VA 21 40 PARTS LIST non RoHS compliant 12 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration Part No Part name Symbol in Wiring Diagram Q ty unit MFZ KA25VA MFZ KA35VA Lt MFZ KASQVA Remarks M21 EOW 235 NOZZLE ASSEMBLY UPPER T2W 6 040 HORIZONTAL VANE BACK T2W A4T 040 HORIZONTAL VANE FRONT T2W A4T 079 VANE SLEEVE M21 EOW 504 BEARING ASSEMBLY M21 E2W 235 NOZZLE ASSEMBLY LOWER T2W AGT 306 DAMPER MOTOR UP amp DOWN T2W A4T 506 VANE MOTOR S
45. MITSUBISHI ELECTRIC FLOOR TYPE HEAT PUMP AIR CONDITIONERS INDOOR UNIT SERVICE MANUAL Wireless type Models MFZ KA25VA MFZ KA25VA MFZ KA35VA MFZ KA35VA MFZ KASOVA MFZ KASOVA MFZ KA25VA MFZ KA35VA MFZ KASOVA 1 2 1 2 1 2 Changes for the Better Revision A MFZ KA25VA A2 MFZ KA35VA 42 and MFZ KA50VA 42 have been added e Failure mode recall function has been corrected RoHS PARTS LIST has been added Please void OB410 No OB410 REVISED EDITION A Outdoor unit service manual SUZ KA VA Series OC323 MXZ A VA Series OB447 OC316 CONTENTS 4 TECHNICAL CHANGES Saa 2 2 PART NAMES AND FUNCTIONS 2 3 SPEGIEICATION n m 4 4 NOISE CRITERIA CURVES 6 5 OUTLINES AND DIMENSIONS 7 6 WIRING DIAGRAM 8 7 REFRIGERANT SYSTEM DIAGRAM 8 8 PERFORMANCE CURVES 9 9 SERVICE FUNCTIONS 19 10 TROUBLESHOOTING ern 21 11 DISASSEMBLY INSTRUCTIONS 35 12 PARTS LIST c fece cec n 39 13 ROHS PARTS LIST eee 43 14 OPTIONAL PART SA 47 NOTE This service manual describes technical data of the indoor units RoHS compliant products have lt G gt m
46. ND T2W L3V 376 TERMINAL BLOCK a N a N a N N Se Se a N O M21 L3V 307 ROOM TEMPERATURE THERMISTOR N d N Se N Se mh mh md h NO O md N9 N9 NO d mh md ek mnd d NO O T2W L3V 450 ELECTRONIC CONTROL P C BOARD 21 N u ee Se N O N M N ee ee ee M N O AUTO RESTART T2W L4V 450 ELECTRONIC CONTROL P C BOARD AUTO RESTART T2W L5V 450 ELECTRONIC CONTROL P C BOARD AUTO RESTART M21 L3V 328 DISPLAY RECEIVER SWITCH P C BOARD T2W L3V 043 LAMP COVER M21 L3V 306 HORIZONTAL VANE MOTOR UNIT UP amp DOWN M21 L3V 300 INDOOR FAN MOTOR ASSEMBLY UPPER RC0J30 M21 L3V 302 LINE FLOW FAN UPPER T2W L3V 382 FUSE T3 15AL250V JI G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G T2W L3V 384 VARISTOR x Including fan motor rubber mount 2PCS SET 45 h h h h h h h h h im RoHS PARTS LIST RoHS compliant MFZ KA25VA MFZ KA35VA MFZ KA50VA 13 4 INDOOR UNIT HEAT EXCHANGER D TE ARAF HEA T UR IRA AAR AAA AAAS ka al 7 Js L I gt
47. R UNIT Refrigerant pipe 12 7 MFZ KASOVA with heat insulator E Flared connection Indoor coil opt thermistor RT12 main exchanger Distributor Indoor coil thermistor RT12 RT14 RT15 main RT13 sub Room temperature thermistor RT11 Flared connection Refrigerant pipe 46 35 Refrigerant flow in cooling with heat insulator gt Refrigerant flow in heating 8 8 PERFORMANCE CURVES MFZ KA25VA MFZ KA35VA MFZ KA50VA The standard data contained in these specifications apply only to the operation of the air conditioner under normal condition Operating conditions vary according to the areas where these units are installed The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve 1 GUARANTEED VOLTAGE 2 AIR FLOW Air flow should be set at MAX 3 MAIN READINGS COOLING HEATING 1 Indoor intake air wet bulb temperature C WB 1 Indoor intake air dry bulb temperature C DB 2 Indoor outlet air wet bulb temperature C WB 2 Indoor outlet air dry bulb temperature C DB 3 Outdoor intake air dry bulb temperature C DB 3 Outdoor intake air wet bulb temperature C WB 4 Total input W 4 Total input W Indoor air wet dry bulb temperature difference on the side of the following chart shows the difference between the indoor in
48. UPPORT N O OI Oo N T2W AGT 049 SM SHAFT T2W AGT 047 DAMPER LIMIT SWITCH CLOSE T2W AAT 047 DAMPER LIMIT SWITCH OPEN M21 WJ7 306 DAMPER LOCK MOTOR RIGHT 8 LEFT M21 W60 703 DRAIN HOSE T2W AGT 041 DAMPER T2W A4T 049 LOCK SHAFT T2W AST 309 LINE FLOW FAN LOWER T2W A4T 301 INDOOR FAN MOTOR ASSEMBLY LOWER RC0J30 T2W A4T 515 MOTOR BAND T2W YH1 376 TERMINAL BLOCK M21 H81 307 ROOM TEMPERATURE THERMISTOR N Se N m N See oe oe oe oe a ee oe Ma N N N m a ole T2W A4T 450 ELECTRONIC CONTROL P C BOARD m m N ee ee ee te Se AUTO RESTART T2W A5T 450 ELECTRONIC CONTROL P C BOARD AUTO RESTART T2W AGT 450 ELECTRONIC CONTROL P C BOARD AUTO RESTART T2W A4T 328 DISPLAY RECEIVER SWITCH P C BOARD M21 EOW 043 LAMP COVER T2W A4T 306 HORIZONTAL VANE MOTOR UNIT UP amp DOWN T2W A4T 300 INDOOR FAN MOTOR ASSEMBLY UPPER RC0J30 T2W A4T 309 LINE FLOW FAN UPPER T2W A4T 382 FUSE T3 15AL250V T2W A4T 384 VARISTOR Including fan motor rubber mount 2PCS SET 41 LI PARTS LIST non RoHS compliant MFZ KA25VA MFZ KA35VA MFZ KA50VA 12 4 INDOOR UNIT HEAT EXCHANGER
49. ait 5 seconds or more and then press EMERGENCY OPERATION switch Measure the supply voltage as follows within 12 seconds after EMERGENCY OPERATION switch is pressed If more than 12 seconds passes by turn OFF the power supply and turn ON it again then measure the voltage 1 Measure the voltage between 212 and GX 2 Measure the voltage between CN212 and Is there anything that interferes the rotation of the line flow fan more than 12 seconds passes after EMERGENCY OPERATION switch is pressed the voltage mentioned in above 2 goes OV DC although the indoor electronic control P C board is normal Yes Remove the object and adjust the line flow fan Is there 311V DC between CN211 O and and does the voltage between CN212 and rise to the range between 3 and 6VDC within 12 seconds after EMERGENCY OPERATION switch is pressed Indoor electronic control P C Board Replace the indoor fan motor Fuse F11 JROSJRO VARISTOR NR11 40 101010 L1 CNTXI CN1Y1 aes Rem EH CN152 Replace the indoor electronic control P C board L1 22 Measure the voltage between 212 and while the fan motor is rotating Is OV DC or 15V DC held unchanged Yes Unchanged Replace the indoor fan motor 28 Indoor unit operates by pressing EMERGENCY OPERATION switch but does not o
50. ark on the spec name plate For servicing of ROHS compliant products refer to the RoHS Parts List Revision A e MFZ KA25VA 42 MFZ KA35VA 42 and MFZ KA50VA L42 have been added e Failure mode recall function has been corrected RoHS PARTS LIST has been added TECHNICAL CHANGES MFZ KA25VA m gt MFZ KA25VA MFZ KA3SVA m gt MFZ KA35VA MFZ KASOVA m gt 2 5 gt 2 gt fo gt fo 1 The operation of thermo off unit has been changed When 2 or more indoor units are connected with a multi type outdoor unit and operated in heat mode lt lA1 gt Indoor fan operates with very Low speed or stops 2 Indoor fan operates intermittently with very Low speed or stops 2 PART NAMES AND FUNCTIONS INDOOR UNIT MFZ KA25VA MFZ KA35VA MFZ KASOVA Front grille Vertical vane Fan guard Air outlet Horizontal vane y ad NN Panel EI Catechin air filter 2 x x x Air cleaning filter Anti Allergy Enzyme Filter blue bellows type Remote controller u A y Damper LI Ji Air outlet Vertical vane Air inlet
51. at capacity kW INPUT Total power input W WB Wet bulb temperature 15 PERFORMANCE DATA COOLING operation Rated frequency 75Hz MFZ KASOVA SUZ KA50VA TH CAPACITY 4 8 kW SHF 0 63 INPUT 1550 W OUTDOOR DB C INDOOR INDOOR 21 25 27 30 DB C WB C Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 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 22 6 12 1 53 0 25 1349 5 90 1 48 0 25 1434 5 76 1 44 0 25 1473 5 52 1 38 0 25 1535 23 18 5 64 2 99 0 53 1240 5 40 2 86 0 53 1302 5 18 2 75 0 53 1364 4 99 2 65 0 53 1426 23 20 5 88 2 41 0 41 1302 5 64 2 31 0 41 1380 5 47 2 24 0 41 1411 5 28 12 16 0 41 1473 23 22 16 12 1 77 0 29 1349 5 90 1 71 0 29 1434 5 76 1 67 0 29 1473 5 52 1 60 0 29 1535 24 18 5 64 3 21 0 57 1240 5 40 3 08 0 57 1302 5 18 2 95 0 57
52. ature C 545545225 25521252528 159219951003 NOTE The above curves for the heating operation without any frost 14515951548 Y xx NN OINNSINNG L lt lt L DS sa i a cj a SUZ KA25VA TH SUZ KA25VA TH SUZ KA25VA TH SUZ KA25VA TH Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input 1 5 2 0 2 0 2 5 2 e 2 2 p 815 81 5 820 1 0 5 8 51 5 o o o o 81 0 21 0 8 5 9 8 81 0 E o 205 gt 8 S 50 5 90 5 5 8 8 205 0 0 0 0 0 0 0 0 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor SUZ KA35VA TH SUZ KA35VA TH SUZ KA35VA TH SUZ KA35VA TH T Correction of Cooling capacity 5 a of Cooling total input Z6 Correction of Heating capacity 5 s Correction of Heating total input 2 p g p 8 815 81 5 520 c 1 0 amp S E c S c1 5 a 51 0 91 0 5 8 9 8 810 mel 20 5 8 gt 8 9 5 8 505 805 805 5 c S 0 0 0 0 0 0 0 0 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor SUZ KA50VA TH SUZ KA50VA TH SUZ KA50VA TH SUZ KA50VA TH Corr
53. block S2 Inverter P C board Parts side V LED O n Blinking OFF inverter controlled lighting equipment Turn OFF the power supply and then turn it ON again Press EMERGENCY OPERATION switch Reinstall either the unit or the Is the serial light away signal error from the indicated 6 other minutes later Attach a filter on receiving section of Yes the indoor B unit Y Turn ON the power supply of the outdoor unit Y In 3 minutes after turning ON the power supply of the outdoor unit does the LED on the inverter P C board repeat quick blinking 3 6 second OFF and 0 8 second ON Be sure to check above in 3 minutes after turning ON After 3 minutes LED blinks 6 times When the inverter P C board is normal LED also blinks 6 times after 3 minutes j Lighting Yes Make them sure X1 Mis wiring may damage indoor electronic control P C board during operation Be sure to confirm the wiring is correct before the operation starts No Replace the inverter P C board 2 3 2 Be careful to the residual voltage of smoothing capacitor Remove the short circuit between outdoor terminal block S2 and S3 Is there amplitude of 10 to 20V DC between outdoor terminal block S2 Is there any error of the indoor outdoor connecting wire such as the damage of th
54. door fan operation 2 5 second OFF 1 time flash Refer to 10 6 2 Check of indoor every 0 5 second Indoor fan motor Lower fan motor Lower When it cannot be read properly data in the Repl ihe indoor electron nirol 12 time flash Not lighted Indoor control system nonvolatile memory of the indoor electronic amp P ace the Indoor electronic contro 2 5 second OFF control P C board P C board 13 time flash Indoor coil thermistor Anen Ie Indoor coll termister Short Replace to the characteristic of the main t l open circuit is detected every 8 seconds 2s secondorr Notlighted Main 3 dunna operation id 3 indoor coil thermistor 10 7 14 time flash When the damper is not located at the ume i designated position BO 2 5 second OFF Not lighted Damper 9 Refer to 10 6 Check of damper 23 10 3 Instruction of troubleshooting Start Indoor unit i operates OPERATION INDICATOR Outdoor unit doesn t oesn t receive Outdoor unit the signal from lamp on the indoor unit is doesn t perate normally flashing on and off remote controller operate If blinking of OPERATION Outdoor unit Outdoor unit Unit doesn t Indoor unit Indoor unit INDICATOR lamp cannot be operates only doesn t operate operates when
55. e wire and S3 Confirmation of serial No intermediate connection poor signal contact to the terminal block No Yes Is there any error of the Is there 230V AC between outdoor indoor outdoor connecting wire terminal block S1 and S2 Such as the damage of the wire Confirmation of power voltage No intermediate connection poor contact to the terminal block Yes 31 Replace the indoor electronic control P C board Be sure to release the failure mode recall function after checking No Yes Yes Replace the indoor outdoor connecting Replace the indoor outdoor connecting When the left lamp of OPERATION INDICATOR lamp flashes 15 time Indoor unit and outdoor unit do not operate Check of damper After performing the check make sure to release the failure mode recall function Turn OFF the power supply Y Is there anything that interferes the opening Yes R mene or closing movement of the damper emove the object v No Turn ON the power supply v Set up the failure mode recall function gt Turn ON the power supply While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 second
56. econd ON gt i i hh j OFF H 48 4 6 4 _ 0 No beep i Beeps i pa No beep i Beeps Repeated cvcle Repeated cycle gt Repeated cycle 22 2 Indoor unit failure mode table NOTE Blinking patterns of this mode differs from the ones of Troubleshooting check table 10 4 Left lamp of Right lamp of i OPERATION OPERATION emna point Check point Countermeasure INDICATOR lamp JINDICATOR lam Failure mode Not lighted Not lighted Normal When the room temperature thermistor T 1 time flash Not lighted Room temperature short or open circuit is detected every 8 Refer to the characteristics of the room every 0 5 second thermistor seconds during operation temperature thermistor 10 7 n When the indoor coil thermistor short or Refer to the characteristic of the main 1 2 2 time flash Not lighted MO 2 open circuit is detected every 8 seconds indoor coil thermistor and the sub indoor 2 5 second OFF i during operation coil thermistor 10 7 3 time flash Not lighted Serial signal error When the serial signal from the outdoor unit is Refer to 10 6 How to check miswiring 2 5 second OFF not received for a maximum of 6 minutes and serial signal error When the rotational frequency feedback Ref 10 6 1 Check of i Not lighted Indoor fan motor Upper signal is not emitted during 12 second the Hs 4 11 time flash in
57. ection of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input 1 5 2 0 2 0 A E p 8 o 9 2 8 815 81 82 0 1 0 S 5 5 8 51 5 S 3 8 51 0 1 5 5 8 51 0 205 8 gt 8 ud G 30 5 g0 805 T 0 0 0 0 0 0 0 0 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT How to operate fixed frequency operation Test run operation H Press the EMERGENCY OPERATION switch or the Test button to COOL or HEAT mode i2 Test run operation starts and continue to operate for 30 minutes i3 Compressor starts at rated frequency in COOL mode or 58Hz in HEAT mode i4 Indoor fan operates at High speed i5 After 30 minutes test run operation finishes and EMERGENCY OPERATION starts j6 To cancel test run operation EMERGENCY OPERATION press the EMERGENCY OPERATION switch or the ON OFF button on remote controller 10 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOLING operation Both indoor and outdoor unit are under the Dry bulb temperature Relative humidity same temperature humidity condition 20 50 Air flow High speed Operational frequency 57Hz SUZ KA25VA TH 25 60 77Hz SUZ KA35VA TH 30 70
58. he power CN212 and of the indoor fan motor Replace the indoor fan motor supply connector Does the unit operate with the remote controller Turn OFF the power supply Short open circuit Does OPERATION INDICATOR lamp light up by Measure the resistance of the horizontal vane Replace the horizontal vane motor and the indoor pressing EMERGENCY OPERATION switch Refer to 10 5 electronic control P C board Replace the varistor NR11 and fuse F11 Ves Are the varistor NR11 burnt No y and the fuse F11 blown Turn OFF the power supply Check both parts side and pattern Be sure to check both the fuse side of the indoor electronic control P C and the varistor in any case board visually No Is the fuse F11 blown only yes Measure the EL between and of the indoor fan X1 The fan motor connector s lead wire is red whereas is black motor connector to CN211 CN212 on the indoor electronic control X2 Connect of the tester to fan motor connector s lead P C board 1 2 wire and to lead wire otherwise the resistance cannot be measured properly Y Is the resistance 1MQ No 5 l Replace the fuse F11 and the indoor fan motor or more Yes Replace the fuse 11 Measure the cement resistance R111 on the indoor electronic control P C board Is the resistance app
59. hough the adjust the line flow fan indoor electronic control P C board is normal Is there 311V DC between CN211 and and does the voltage between CN211 and rise to the range between 3 and 6V DC within 12 seconds after EMERGENCY OPERATION switch is pressed Indoor electronic control P C Board Replace the indoor fan motor Fuse F11 H JR05 R06 VARISTOR NR11 IC101 om nies M 111 111111 152 C4 CN211 Replace the indoor electronic control P C board Ck CN212 The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops No Changed Measure the voltage between CN211 and while the fan motor is rotating Is OV DC or 15V DC held unchanged Replace the indoor electronic control P C board Yes Unchanged Replace the indoor fan motor 27 When the left lamp of OPERATION INDICATOR lamp flashes 3 times and the right lamp of OPERATION INDICATOR lamp flashes ON and OFF every 0 5 second Indoor fan does not operate A 2 Check of indoor fan motor lower 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 CN212 Turn ON the power supply w
60. igh Low 1 890 1 746 2 058 1 506 1 896 1 668 1 956 1 356 2 940 1 650 2 940 2 210 Starting current 1 4 0 5 0 8 5 lectrical Compressor motor current 1 23 35 45 45 65 80 Fan motor current 1 0 33 0 33 0 30 Coefficient of performance C O 431 4 07 3231 36 310 323 Model KNBO73FDVH KNBO92FCAH SNB130FLDH Output 550 650 850 Winding resistance at 20 C Compressor U V 1 53 U W 1 53 V W 1 53 U V 0 49 U W 0 49 V W 0 49 U V 0 45 U W 0 45 V W 0 45 Model RC0J50 AL RC0J50 AL RC0J60 AA Winding resistance at 20 Fan motor WHT BLK 37 5 BLK RED 37 5 RED WHT 37 5 WHT BLK 37 5 BLK RED 37 5 RED WHT 37 5 WHT BLK 15 2 BLK RED 15 2 RED WHT 15 2 Dimensions WxHxD 800x550x285 800x550x285 840x850x330 Weight 33 37 53 Sound level 1 46 47 48 53 55 Fan speed High Low High Med Low 810 750 880 81 0 650 840 760 880 800 630 800 480 800 650 Fan speed regulator 2 3 2 3 2 Refrigerant filling capacity R410A 0 90 1 05 1 60 Refrigerating oil Model 0 32 NEO22 0 32 NEO22 0 45 NEO22 Thermistor RT61 at 32 6 32 6 Thermistor RT62 at 100 C 13 4 13 4 Thermistor RT64 at 50 C 17 17 Thermistor RT65 at 25 C 10 10 Thermistor RT61 at
61. indoor coil motor control system in outdoor control or trouble thermistor system abnormality unit system of serial signal Refer to 10 6 Check room Refer to 10 6 Replace the Refer to Refer to Replace the Check Refer to Howto temperature 1 2 indoor How to check Check of inverter Flow chart of 10 6 check the thermistor Check of electronic jithe inverter outdoor board or the detailed Check of mis wiring and indoor indoor fan control jcompressor thermistors the outdoor outdoor unit damper and serial coil thermis motor P C board electronic failure mode signal error tor control P C recall function when Refer to 10 7 board outdoor unit Test point doesn t work diagram and voltage brunan Sec amaga AANA D ee eee E Aa Enep 10 4 Troubleshooting check table OPERATION INDICATOR 2 Lighted 2 Blinking Not lighted Flashing of OPERATION INDICATOR lamp left hand side lamp indicates abnormalities NOTE Before taking measures make sure that the symptom reappears for accurate troubleshooting Self check table Abnormal point Operation indicator lamp Symptom Check point Countermeasure Mis Wiring or serial signal Left lamp flashes 0 5 second ON 80808
62. lace the indoor electronic control P C board Replace the motor that indicates the abnormal value 1 Is there OV DC between CN1X1 and 2 Is there 5V DC between CN1Y1 and Replace either or both damper limit switches open close as follows 1 No Replace the damper limit switch open Yes 2 No Replace the damper v limit switch close Make the damper close by pressing VANE CONTROL button Y 1 Measure the voltage between CN1X1 and 2 Measure the voltage between CN1Y1 and Y 1 Is there 5V DC between CN1X1 and 2 Is there OV DC between CN1Y1 and 1 No Replace either or both damper limit switches open close as follows 1 No Replace the damper Replace the indoor electronic control P C board 32 2 No limit switch open Yes 2 No Replace the damper limit switch close F Electromagnetic noise enters into TV sets or radios No Is the unit earthed Earth the unit Yes Is the distance between the ar vo TE unit within 3m or is the distance between the unit or the antennas antennas and the outdoor and the outdoor unit unit within 3m v Is the distance between the TV sets or radios and the vos Extend the distance between sets or radios and the indoor unit within 1m or is the TV sets or radios and the sets or
63. memorize the abnormal condition which has occurred once Even though OPERATION INDICATOR 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 which doesn t recur 1 Flow chart of failure mode recall function for the indoor outdoor unit Operational procedure The cause of abnormality cannot be found because the abnormality doesn t recur While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds Setting up the failure mode recall function Turn ON the power supply While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds Y Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 3 1 1 Regardless of normal or abnormal a short beep is e
64. ment of the air cleaning filter 1 Remove the catechin air filter 3 Attach a new air cleaning filter Fix the filter Open the front grille with the tabs securelv Catechin air filter 2 Remove the air cleaning filter 4 Install the catechin air filter Be sure to install its both ends into the tabs Air cleaning filter as shown below Catechin air filter Install 5 Securely close the front grille 47 sa MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Jun 2006 No OB410 REVISED EDITION A 8 Distributed in May 2005 No OB410 8 New publication effective Jun 2006 Made in Japan Specifications subject to change without notice
65. mitted once as the signal is received Y Does the left lamp of OPERATION INDICATOR lamp l s aqe No Indoor unit is normal on the indoor unit blink at the interval of 0 5 seconds OFF But the outdoor unit might be abnormal because there are some Blinks Either indoor or outdoor unit is abnormal abnormalities that are not memorized in the indoor unit Beep are emitted at the same timing Confirm if outdoor unit is abnormal according to the flow chart of the as the blinking of the left lamp of detailed outdoor unit failure mode recall function OPERATION INDICATOR lamp 3X2 Yes Judgment of indoor outdoor abnormality y Blinks Before blinking does the left lamp of OPERATION Yes INDICATOR lamp stay ON for 3 seconds Stays ON for 3 seconds without beep The outdoor unit is abnormal w ui The outdoor unit is abnormal neci dno allah ad confirm the Check the blinking pattern and confirm the abnormal point with the abnormal point with the indoor unit failure mode table 10 2 2 outdoor unit failure mode table Refer to outdoor unit service manual Make sure to check at least two consecutive blinking cycles Sure to checkiat eastimoconse utive DINING Cycles No Releasing the failure mode recall function fi Release the failure mode recall function bv the following procedures Turn OFF the power supply and turn
66. motor See Photo 11 and 12 6 Lift the nozzle slightly and remove the lock shaft from with in the nozzle and remove the damper lock motors ML1 ML2 7 Remove the screws of the damper motor support and then the damper motor support 8 Remove the screws of the damper motor and then the damper motor from the damper motor support 9 Disconnect the connector from the damper motor 10 Remove the damper limit switches LS1 LS2 7 Removing the indoor fan motor lower 1 Remove the panel Refer to 1 2 Remove the nozzle assembly lower and the drain hose Refer to 6 3 Remove the screw of the ground wire of the indoor fan motor lower and then the ground wire See Photo 13 4 Remove the screw of the motor band and then the motor band See Photo 13 5 Remove the line flow fan and the indoor fan motor lower from the box Photo 13 Screw of Screw of the the motor band ground wire Screw of Screw of the nozzle the nozzle Photo 10 Lead wires of the damper motor and the damper lock motor Photo 11 Screw of the support Screw of the damper damper Drain hose damper motor Screws of the motor support lock motor Left Photo 12 Screws of the damper lock motor Right 38 12 PARTS LIST non RoHS compliant MFZ KA25VA MFZ KA35VA MFZ KA50VA 12 1 INDOOR UNIT STRUCTURAL PARTS 12 2 ACCESSORY AND REMOTE CONTROL
67. not operate An abnormality other than above mentioned is detected Confirm the abnormality in detail using the failure mode recall function Refer to outdoor unit service manual Indoor damper Left lamp flashes 15 time flash sososososososososo s0808 0800000 2 5 second OFF Indoor unit and outdoor unit do not operate When the damper is not located at the designated position Refer to 10 6 Check of damper 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 OPERATION INDICATOR lamp flashing 25 OPERATION INDICATOR w x 7 s L 16 N N 2 em 20 IO Y f FIM 2 Abnormal point Operation indicator lamp Lighted Blinking abnormality Not lighted OPERATION INDICATOR lamp left hand side lamp is lighted Symptom Check point Flashing of OPERATION INDICATOR lamp right hand side lamp indicates Countermeasure MXZtype Right lamp flash Operation 000008000008 mode l Outdoor unit operates but indoor unit ws setting 2 5 second OFF does not operate When the operation mode of the each indoor unit is differently set to COOL includes DRY and HEAT at the same time the operation mode of the indoor unit that has operated at fir
68. ns TIME FORWARD button 4 BACKWARD button RESET clock 319 E RESET button CLOCK SET button J VANE CONTROL button SPECIFICATION Indoor model MFZ KA25VA MFZ KA35VA MFZ KA50VA Function Cooling Heating Cooling Heating Cooling Heating Power supply Single phase 230V 50Hz Single phase 230V 50Hz Single phase 230V 50Hz Air flow Super High 522 546 546 570 642 708 Air flow High Med Low 426 348 288 456 372 300 444 366 300 468 372 312 552 4741 426 588 528 444 Electrical Power outlet 10 10 10 Running current 1 0 2 0 2 0 2 Power input 1 25 25 25 Auxiliary heater Power factor 1 54 54 54 Fan motor current 1 0 2 0 2 0 2 Model Upper RCOJ3O GA RCOJ3O GA RCOJ3O GA Model Lower RCOJ3O HA RCOJ3O HA RCOJ3O HA Dimensions WxHxD 700 600 200 700 600 200 700 600 200 Weight 14 14 14 Air direction 5 5 5 Sound level Super High 37 38 43 44 Sound level High Med Low 32 27 22 33 28 23 38 28 25 39 35 32 speed Super High 1 080 1 010 1 130 1 030 1 280 1 260 Fan speed High Med Low 940 800 700 870 740 630 970 830 720 890 740 650 1 140 1 020 940 1 070 930 850
69. oving the panel Photo 1 1 Push both sides of the upper part of the front grille and pull the front grille open and then remove the front grille from the panel See Photo 1 2 Remove the screws of the panel See Photo 2 3 Open the horizontal vane and push the left right and middle of the upper part of the panel and pull the panel Push toward you See Photo 2 4 Lift up the panel and remove it from the box Grille Photo 2 Screws of the panel Horizontal vane 35 OPERATING PROCEDURE PHOTOS 2 Removing the electronic control P C board and the Photo 3 display receiver P C board 1 Remove the panel Refer to 1 Y 2 Remove the screw of the electrical cover and then the electrical cover See Photo 3 8 Remove the screw of the ground wires under the electrical box and then the ground wires See Photo 4 4 Remove the screw of the ground wires connected to the indoor fan motor lower and then the ground wires See Photo 4 b Remove the screw of the ground wires connected to the indoor heat exchanger and then the ground wires See Photo 4 6 Unhook the lamp cover from the catch See Photo 4 7 Open the lamp cover and pull out the display receiver P C board 8 Remove the screw of the ground wires connected to the electronic control P C board and then the ground wires See Photo 4 9 Pull the electronic control P C board slightly toward
70. ower supply and with the remote controller headed towards the indoor unit press the OPERATE STOP ON OFF button If one or two beeps is heard from the indoor unit modification is completed correctly 19 9 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 D If the main power has been cut the operation settings remain After the power is restored the unit restarts automatically according to the memory However it takes at least 3 minutes for the compressor to start running How to release AUTO RESTART FUNCTION Turn off the main power for the unit Solder the Jumper wire to JRO7 on the indoor electronic control P C board Refer to 10 7 CN111 CN112 NOTE 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 AUTO START STOP timer is active the timer setting is cancelled e f the unit has been off with the remote controller before power failure the auto restart function does not work
71. perate with the remote coniroller of remote controller and receiver P C board Check if the remote controller is exclusive for this air conditioner C Switch on the remote controller i No Is the LCD display on ane he p Replace the batteries Refer to 10 1 4 remote controller visible not clear Y Yes Remove the batteries then set them back and press RESET button Refer to 10 1 4 Check if the unit operates with the remote controller Does the unit operate with the No Turn on a radio to AM and press switch on remote controller the remote controller Yes Y No Is noise heard from radio p Replace the remote controller Y Yes Are there any fluorescent lights of Yes Reinstall the unit away from lights inverter or of rapid start type within Attach a filter on receiving part the range of 1m Y Replace the indoor electronic control P C board 29 The unit cannot be operated 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 Remove indoor fan motor connector CN211 CN212 and Turn OFF the power supply vane motor connector CN151 CN152 from the indoor NI Measure the resistance between CN211 Short open circuit electronic control P C board and turn ON t
72. r of the lead wire Normal Abnormal BRN other one 2350 2550 Open or short circuit Horizontal vane motor MV2 Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Color of the lead wire Normal Abnormal BRN other one 2820 306Q Open or short circuit 26 ORN GRN 10 6 Troubleshooting flow When the left lamp of OPERATION INDICATOR lamp flashes 3 times and the right lamp of OPERATION INDICATOR lamp is not lighted Indoor fan does not operate A 1 Check of indoor fan motor upper 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 Turn ON the power supply wait 5 seconds or more and then press EMERGENCY OPERATION switch Measure the supply voltage as follows within 12 seconds after EMERGENCY OPERATION switch is pressed If more than 12 seconds passes by turn OFF the power supply and turn ON it again then measure the voltage 1 Measure the voltage between CN211 and 2 Measure the voltage between CN211 and Is there anything that interferes the rotation of the line flow fan Yes i xlf more than 12 seconds passes after EMERGENCY OPERATION switch Remove the object and is pressed the voltage mentioned in above 2 goes OV DC alt
73. res X O IA x Lead wiring Housing point 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 board is supposed to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 10 2 10 3 and 10 4 4 How to replace batteries Weak batteries may cause the remote controller malfunction In this case replace the batteries to operate the remote controller normally Remove the front lid and insert batteries Press RESET button with tip end of ball point pen Then reattach the front lid or the like and then use the remote controller Cs Insert the negative pole of the batteries first Check if the polarity RESET button of the batteries are correct NOTE 1 If RESET button is not pressed the remote controller may not operate correctly 2 This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by the battery replacement INFORMATION FOR MULTI SYSTEM A
74. rox 40 Replace the indoor electronic control P C board and the indoor fan motor Yes Indoor electronic Replace the indoor electronic control P C board control P C Board Fuse F11 H JRos JRO6 VARISTOR NR11 gt 11010 CNTX1 CN1Y1 CN151 citri CN152 CN211 CN212 R111 X 30 When the left lamp of 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 of 230V AC in the power supply Yes Turn ON the power supply Y Is there 230V AC between outdoor terminal block S1 and 52 4 Yes No No Check the power supply Check the wiring Press EMERGENCY O PERATION switch once Is the serial signal error Y Does the left lamp of OPERATION INDICATOR lamp light up lt Confirmation of the power supply to the indoor unit gt Yes yY No indicated 6 minutes later gt F Yes lt Is there any mis wiring poor contact or wire disconnection of the indoor outdoor connecting wire No Y A Y Turn OFF the power supply Check once again i if the indoor outdoor connecting wire is not wrongly connected Short circuit the ou and S3 x1 door terminal
75. s v Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 3 1 Y With the remote controller headed towards the indoor unit press VANE CONTROL button Y Does the damper open and close Normally the damper opens and closes each time VANE CONTROL button is pressed While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds 4 MITSUBISHI ELECTRIC X1 Regardless of normal or abnormal a short beep is emitted once as the signal is received Indoor electronic control P C Board Fuse F11 H JR05 R06 VARISTOR NR11 4O 101010 o om CNIY1 CN151 LJ Turn OFF the power supply 111 eri TH 5 152 Measure the resistance according to 10 5 2 5 Md prd O LI 11 1 Measure the resistance of the damper lock motors ML1 2 CN212 2 Measure the resistance of the damper motor MV2 Y 1 Measure the voltage between CN1X1 and 2 Measure the voltage between CN1Y1 and Is the resistance value normal each l Yes Rep
76. st has the priority Unify the operation mode Refer to outdoor unit service manual 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 OPERATION INDICATOR lamp flashing 10 5 Trouble judgement criteria of main parts MFZ KA25VA MFZ KA35VA MFZ KASOVA Part name Check method and criteria Room temperature thermistor RT11 Indoor coil thermistor RT12 MAIN RT13 SUB Measure the resistance with a tester Part temperature 10 C 30 C Normal Abnormal 8 kQ 20 Open or short circuit Indoor fan motor Upper MF1 Check 10 6 B 1 Indoor fan motor Lower MF2 Check 10 6 9 2 Damper lock motor Right ML1 Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Color of the lead wire Normal Abnormal BRN other one 2350 2550 Open or short circuit Damper lock motor Left ML2 Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Color of the lead wire Normal Abnormal BRN other one 2350 2550 Open or short circuit Horizontal vane motor MV1 Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Colo
77. take air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service How to measure the indoor air wet bulb dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air inlet as shown in the figure and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet The thermometers must be attached to the position where air speed is high attach at least 2 sets of wet and dry bulb thermometers to the outdoor air inlet Cover the thermometers to prevent direct rays of the sun ine 3 Check that the air filter is cleaned 4 Open windows and doors of the room 5 Press the EMERGENCY OPERATION switch once to start the COOL HEAT MODE 6 When system stabilizes after more than 15 minutes measure temperature and take an average temperature 7 10 minutes later measure temperature again and check that the temperature does not change Wet and dry bulb INDOOR UNIT E OUTDOOR UNIT TECTI re Wet and dry bulb thermometers FRONT VIEW VIEW 2 Cooling capacity Total input cooling 5 7 4 10 4 12 5 14 1 4 5 6 8 9 5 11 4 813 S 1 3 E H 8
78. unit and outdoor unit do not operate When it cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board Outdoor power System Left lamp flashes 5 time flash sososososooooososo NTN b TS 2 5 second OFF Indoor unit and outdoor unit do not operate The compressor stops 3 times consecutively for over current protection or start up failure protection within 1 minute after start up Refer to Check of inverter compressor Refer to outdoor unit service manual Check the stop valve Outdoor thermistors Left lamp flashes 6 time flash osoooocoso a 2 5 second OFF Indoor unit and outdoor unit do not operate When the outdoor thermistors short or open circuit during the compressor operation Refer to Check of outdoor thermistor Refer to outdoor unit service manual Outdoor control system Left lamp flashes 7 time flash 2 5 second OFF Indoor unit and outdoor unit do not operate When it cannot properly read data in the nonvolatile memory of the inverter P C board or of the outdoor electronic control P C board Replace the inverter P C board or the outdoor electronic control P C board Refer to outdoor unit service manual Other abnormality Left lamp flashes 14 time flash sososososo sososooooo Lo 2 5 second OFF Indoor unit and outdoor unit do
79. x from the box 36 OPERATING PROCEDURE PHOTOS 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 Screw of the horizontal vane motor unit 5 Removing the indoor fan motor upper 1 Remove the panel Refer to 1 2 Remove the electrical box Refer to 3 3 Remove the nozzle upper See Photo 7 4 Unhook the water cover from the catches and remove the water cover See Photo 7 5 Removing the screw of the motor band and then the motor band See Photo 8 6 Remove the line flow fan and the indoor fan motor upper from the box Photo 7 Photo 8 Nozzle lt Upper gt Water cover Screw of the motor band 37 OPERATING PROCEDURE PHOTOS 6 Removing the damper lock motor the damper motor and the damper limit switch 1 Remove the panel Refer to 1 2 Remove the screws of the nozzle assembly lower See Photo 9 3 Remove the drain hose from the nozzle assembly lower and pull out the nozzle assembly lower toward you 4 Remove the tape fixing the lead wires of the damper motor and the damper lock motor from the nozzle assembly lt lower gt See Photo 10 5 Remove the screws of the damper lock

Mitsubishi Electric MFZ-KA25VA air conditioner

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