Mitsubishi Electric MUCFH-13NV-E4 Service Manual Download Page 36 | Manualshive

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36

4. Defrosting

Defrosting of outdoor heat exchanger is controlled by DEICER P.C. board, with detection by the defrost thermistor RT61.

(1) Starting conditions of defrost

When all conditions of a) ~ c) are satisfied, the defrosting operation starts.
a) The compressor cumulative operation time exceeds 40 minutes without the defrosting operation working.
b) The defrost thermistor RT61 reads - 3°C or less.
c) After releasing the high pressure protection 4 minutes and 15 seconds have elapsed.

(2) Releasing conditions of defrost

When the condition d) or e) is satisfied, the defrosting operation stops.
d) The defrost thermistor RT61 reads 3.1°C or more.
e) The defrosting time exceeds 10 minutes.

(3) Defrosting time chart

NOTE1.: • When the indoor coil thermistor reads above 18°C, indoor fan operates at Very Low for 30 seconds.

When the indoor coil thermistor reads 18°C or less, the indoor fan stops.

3.1

:

or more

-3

:

or less

Compressor contactor
(Outdoor 52C)

X62
(R.V. coil)

SR61
(Outdoor fan)

Defrost
counter

Indoor fan

Indoor vane

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Position 1

Set
Position

Max. 10 min.

30 sec.

15 sec.

30 sec.

5 sec.

NOTE1

Defrost thermistor RT61

Very Low

(MCFH-24)

(MCFH-13/18)

NOTE2. : • Refer to service manual OB185 REVISED EDITION-C for MCFH-13NV-

or MCFH-18NV-

is connected

with MXZ-32NV-

.

• Refer to service manual OB227 REVISED EDITION-B for MCFH-13NV-

or MCFH-18NV-

is connected

with MXZ-32RV-

.

• Refer to service manual OB254 for MCFH-13NV-

or MCFH-18NV-

is connected with MXZ-32SV-

.

E1

E3

E4

E1

E3

E4

E2

E3

E4

OB267--2.qxp 01.12.19 3:00 PM Page 36

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Summary of Contents for MUCFH-13NV-E4

Page 1: ... for MCFH 13NV or MCFH 18NV is connected with MXZ 32RV Refer to service manual OB254 for MCFH 13NV or MCFH 18NV is connected with MXZ 32SV As for parts lists all sub number s series are included E1 E3 E4 E1 E3 E4 E2 E3 E4 E3 E3 E2 E2 E1 E1 Revision MUCFH 18NV has been added MUCFH 18NV MUCFH 18NV Path of outdoor heat exchanger has changed Temperature range of high pressure protection has changed Pl...

Page 2: ...rain hose Drain pipe cover Knockout cover Screw for 4 o 10mm 2 2 1 1 2 2 1 1 1 2 Q ty Remote controller 2 MCFH 13NV MUCFH 13NV MCFH 13NV MUCFH 13NV 1 Remote controller has changed SWING button is removed but SWING MODE function is available by VANE CONTROL button MCHF 18NV MUCFH 18NV MCFH 18NV MUCFH 18NV 1 Remote controller has changed SWING button is removed but SWING MODE function is available b...

Page 3: ...Piping Drain hose MUCFH 24NV E3 Air inlet Air outlet ACCESSORIES Item Drain socket Drain cap 33 Drain cap 16 1 2 1 Q ty MUCFH 18NV E3 E4 MUCFH 24NV E3 1 6 1 2 MUCFH 13NV E4 OUTDOOR UNIT MUCFH 13NV E4 Air inlet Piping Drain hose Air outlet Drain outlet back and side ...

Page 4: ... the front lid Signal transmitting section Operation display section OPERATE STOP ON OFF button TEMPERATURE buttons OPERATION SELECT button FAN SPEED CONTROL button OFF TIMER button HR button MIN button TIME SET button ON TIMER button RESET button VANE CONTROL button CLOCK SET button MCFH 13NV MCFH 18NV MCFH 24NV E3 E3 E4 REMOTE CONTROLLER ...

Page 5: ...35 520 MS56 33 18 Cooling 5 0 2 6 9 3 9 0 2 030 2 120 99 98 0 36 2 46 2 36 8 55 8 25 0 39 Heating 5 4 8 9 8 6 1 910 2 010 98 97 0 36 2 83 2 69 8 15 7 85 0 39 Single phase 220 240 V 50Hz 840 696 570 15 52 58 RB4V36 AB WHT BLK 82 9 BLK YLW 65 6 YLW BLU 36 0 BLU BRN 27 0 BRN RED 13 7 1100 650 180 26 5 48 48 43 45 38 40 1 310 1 330 1 120 1 170 920 1 000 3 10 10 2 142 2 244 NH 36VMDT 1 700 C R 1 20 C S...

Page 6: ... 24 Heating DB 7 WB 6 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE SPEED 49 49 SPL dB A LINE High MCFH 18NV E3 MUCFH 18NV MUCFH 18NV E4 E3 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 002 MICRO BAR BAND CENTER FREQUENCIES Hz Test conditions Cooling DB 27 WB 19 Heating DB 20 WB 15 APPROXIMATE THRE...

Page 7: ...0 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 002 MICRO BAR BAND CENTER FREQUENCIES Hz APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE Test conditions Cooling DB 35 WB 24 Heating DB 7 WB 6 High SPEED 53 53 SPL dB A LINE When installed on the floor When installed on the ceiling 50cm or more 50cm or more 50cm or more 50cm or more 100cm or more 650 616 5 80 8 906 112 8 114 16 110...

Page 8: ...nt pipe flared 12 7 Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 Airout Air in Air in 109 32 110 147 Drainage 3holes 33 MUCFH 18NV MUCFH 18NV E4 E3 605 292 20 50 133 500 161 850 74 30 100 157 35 30 Service panel Liquid refrigerant pipe joint Refrigerant pipe flared Gas refrigerant pipe joint Refrigerant pipe flared 6 35 15 88 MUCFH 13NV E4 OUTDOOR UNIT 100mm or more 100mm or more 100...

Page 9: ... 362 17 15 39 5 27 5 Terminal block for indoor and outdoor unit connection Handle for moving 179 524 441 445 450 468 553 850 40 60 524 Service panel Refrigerant pipe flared connection 15 88 Refrigerant pipe flared connection 9 52 Knock out hole for front piping refrigerant drainage and wiring Knock out hole for right piping refrigerant drainage and wiring 60 120 45 53 Knock out holes for power lin...

Page 10: ...C MF NR61 RT61 SR61 SYMBOL C1 C65 DSAR F61 IC881 NAME NAME NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 2A DC DC CONVERTER COMPRESSOR INNER PROTECTOR OUTDOOR FAN MOTOR INNER PROTECTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK R V COIL RELAY R V COIL COMPRESSOR CONTACTOR VG79B037H02 VG79B013H01 NOTE 1 About the outdoor side electric wiring refer to the outd...

Page 11: ...SYMBOL MV NR11 RT11 RT12 SYMBOL C11 F11 HIC1 MF NAME NAME NAME INDOOR FAN CAPACITOR FUSE 3 15A DC DC DONVERTER INDOOR FAN MOTOR INNER PROTECTOR VANE MOTOR VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR SOLID STATE RELAY SWITCH ROOM TEMPERATURE THERMISTOR P C BOARD TERMINAL BLOCK CONTACTOR NOTE 1 About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram f...

Page 12: ...OMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 2A DC DC CONVERTER SYMBOL MC MF NR61 RT61 SR61 NAME COMPRESSOR INNER PROTECTOR FAN MOTOR INNER PROTECTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY SYMBOL TB X62 21S4 52C NAME TERMINAL BLOCK R V COIL RELAY R V COIL COMPRESSOR CONTACTOR NOTE 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for s...

Page 13: ... V COIL COMPRESSOR CONTACTOR NOTES 1 Use copper conductors only For field wiring 2 Since the indoor and outdoor unit connecting wires have polarity connect them according to the numbers 3 2 N 3 Symbols below indicate Terminal block Connector AUTO RESTART ASSY 5 CN 104 CIRCUIT BREAKER POWER SUPPLY N 220 240V 50Hz SR144 LDFH BLK TB GRN YLW TRANS HIC1 MV 5 6 CN 151 BLK 12VDC 8 3 RED L N BRN 220 240V ...

Page 14: ...ting ON cooling OFF Capillary tube 3 0o 1 4o500 INDOOR UNIT MCFH 13NV E4 OUTDOOR UNIT MUCFH 13NV E4 Defrost thermistor RT61 Indoor heat exchanger Outdoor heat exchanger Distributor Flared connection Room temperature thermistor RT11 Coil temperature thermistor RT12 Flared connection Stop valve Stop valve with service port Strainer Capillary tube Capillary tube 3 0o 1 6o750 Capillary tube 3 0o 1 6o7...

Page 15: ... Model A Refrigerant piping Max length 15m W Max Height difference 5m MAX REFRIGERANT PIPING LENGTH MAX HEIGHT DIFFERENCE MCFH 13NV MUCFH 13NV MCFH 18NV MUCFH 18NV MUCFH 18NV MCFH 24NV MUCFH 24NV E3 E3 E4 E3 E3 E4 E4 Refrigerant piping MAX length mm A 15 Piping size O D mm Gas Liquid 12 7 6 35 15 88 wIt does not matter which unit is higher Models Outdoor unit precharged 1 350 1 800 Refrigerant pip...

Page 16: ...d 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 2 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 3 Check that the air filter is cleane...

Page 17: ... 5 6 4 3 0 7 0 6 0 5 0 4 0 3 0 2 15 18 20 25 30 32 35 50 60 70 Ambient temperature Ambient humidity Outdoor low pressure 10 9 8 7 6 5 15 18 20 25 30 32 35 50 60 70 Ambient temperature Ambient humidity Outdoor unit current A 240V 220V 7 6 4 3 2 5 220 240V MPa Gauge kgf F Gauge MUCFH 13NV E4 MUCFH 18NV MUCFH 18NV E4 E3 2 Air flow should be set at MAX 3 The unit of pressure has been changed to MPa on...

Page 18: ...utdoor unit current A 5 7 10 15 20 25 7 8 9 10 240V 220V 50 60 70 Ambient temperature Ambient humidity 50 60 70 Ambient temperature Ambient humidity 50 60 70 Ambient temperature Ambient humidity MUCFH 18NV MUCFH 18NV E4 E3 Ambient temperature Ambient humidity 240V 220V 13 12 11 10 9 8 7 15 18 20 25 30 32 35 50 60 70 Ambient temperature Ambient humidity Outdoor unit current A 0 7 0 6 0 5 0 4 0 3 0 ...

Page 19: ... 27 24 4 96 2 08 0 42 1192 4 77 2 00 0 42 1258 4 66 1 96 0 42 1297 4 51 1 90 0 42 1362 27 26 5 11 1 53 0 30 1258 4 96 1 49 0 30 1323 4 88 1 47 0 30 1362 4 74 1 42 0 30 1402 28 18 4 35 3 56 0 82 1048 4 16 3 41 0 82 1100 4 00 3 28 0 82 1153 3 85 3 16 0 82 1205 28 20 4 53 3 17 0 70 1100 4 35 3 04 0 70 1166 4 22 2 95 0 70 1192 4 07 2 85 0 70 1245 28 22 4 72 2 74 0 58 1140 4 55 2 64 0 58 1212 4 44 2 58...

Page 20: ... 27 24 4 26 1 79 0 42 1441 4 00 1 68 0 42 1507 3 89 1 63 0 42 1539 3 77 1 59 0 42 1572 27 26 4 48 1 34 0 30 1493 4 22 1 27 0 30 1559 4 09 1 23 0 30 1592 3 96 1 19 0 30 1624 28 18 3 63 2 97 0 82 1284 3 33 2 73 0 82 1362 3 20 2 62 0 82 1389 3 07 2 52 0 82 1415 28 20 3 81 2 67 0 70 1336 3 55 2 49 0 70 1402 3 42 2 40 0 70 1441 3 29 2 31 0 70 1480 28 22 4 03 2 34 0 58 1389 3 77 2 19 0 58 1467 3 64 2 11...

Page 21: ... 27 24 4 96 2 08 0 42 1274 4 77 2 00 0 42 1344 4 66 1 96 0 42 1386 4 51 1 90 0 42 1456 27 26 5 11 1 53 0 30 1344 4 96 1 49 0 30 1414 4 88 1 47 0 30 1456 4 74 1 42 0 30 1498 28 18 4 35 3 56 0 82 1120 4 16 3 41 0 82 1176 4 00 3 28 0 82 1232 3 85 3 16 0 82 1288 28 20 4 53 3 17 0 70 1176 4 35 3 04 0 70 1246 4 22 2 95 0 70 1274 4 07 2 85 0 70 1330 28 22 4 72 2 74 0 58 1218 4 55 2 64 0 58 1295 4 44 2 58...

Page 22: ... 27 24 4 26 1 79 0 42 1540 4 00 1 68 0 42 1610 3 89 1 63 0 42 1645 3 77 1 59 0 42 1680 27 26 4 48 1 34 0 30 1596 4 22 1 27 0 30 1666 4 09 1 23 0 30 1701 3 96 1 19 0 30 1736 28 18 3 63 2 97 0 82 1372 3 33 2 73 0 82 1456 3 20 2 62 0 82 1484 3 07 2 52 0 82 1512 28 20 3 81 2 67 0 70 1428 3 55 2 49 0 70 1498 3 42 2 40 0 70 1540 3 29 2 31 0 70 1582 28 22 4 03 2 34 0 58 1484 3 77 2 19 0 58 1568 3 64 2 11...

Page 23: ...46 2010 27 24 6 70 2 28 0 34 1847 6 45 2 19 0 34 1949 6 30 2 14 0 34 2010 6 10 2 07 0 34 2111 27 26 6 90 1 52 0 22 1949 6 70 1 47 0 22 2050 6 60 1 45 0 22 2111 6 40 1 41 0 22 2172 28 18 5 88 4 35 0 74 1624 5 63 4 16 0 74 1705 5 40 4 00 0 74 1786 5 20 3 85 0 74 1868 28 20 6 13 3 80 0 62 1705 5 88 3 64 0 62 1807 5 70 3 53 0 62 1847 5 50 3 41 0 62 1929 28 22 6 38 3 19 0 50 1766 6 15 3 08 0 50 1878 6 ...

Page 24: ...46 2355 27 24 5 75 1 96 0 34 2233 5 40 1 84 0 34 2335 5 25 1 79 0 34 2385 5 10 1 73 0 34 2436 27 26 6 05 1 33 0 22 2314 5 70 1 25 0 22 2416 5 53 1 22 0 22 2466 5 35 1 18 0 22 2517 28 18 4 90 3 63 0 74 1989 4 50 3 33 0 74 2111 4 33 3 20 0 74 2152 4 15 3 07 0 74 2192 28 20 5 15 3 19 0 62 2071 4 80 2 98 0 62 2172 4 63 2 87 0 62 2233 4 45 2 76 0 62 2294 28 22 5 45 2 73 0 50 2152 5 10 2 55 0 50 2274 4 ...

Page 25: ...46 2099 27 24 6 70 2 28 0 34 1929 6 45 2 19 0 34 2035 6 30 2 14 0 34 2099 6 10 2 07 0 34 2205 27 26 6 90 1 52 0 22 2035 6 70 1 47 0 22 2141 6 60 1 45 0 22 2205 6 40 1 41 0 22 2268 28 18 5 88 4 35 0 74 1696 5 63 4 16 0 74 1781 5 40 4 00 0 74 1866 5 20 3 85 0 74 1950 28 20 6 13 3 80 0 62 1781 5 88 3 64 0 62 1887 5 70 3 53 0 62 1929 5 50 3 41 0 62 2014 28 22 6 38 3 19 0 50 1844 6 15 3 08 0 50 1961 6 ...

Page 26: ...46 2459 27 24 5 75 1 96 0 34 2332 5 40 1 84 0 34 2438 5 25 1 79 0 34 2491 5 10 1 73 0 34 2544 27 26 6 05 1 33 0 22 2417 5 70 1 25 0 22 2523 5 53 1 22 0 22 2576 5 35 1 18 0 22 2629 28 18 4 90 3 63 0 74 2078 4 50 3 33 0 74 2205 4 33 3 20 0 74 2247 4 15 3 07 0 74 2290 28 20 5 15 3 19 0 62 2162 4 80 2 98 0 62 2268 4 63 2 87 0 62 2332 4 45 2 76 0 62 2396 28 22 5 45 2 73 0 50 2247 5 10 2 55 0 50 2374 4 ...

Page 27: ... 27 24 8 04 2 73 0 34 2475 7 74 2 63 0 34 2611 7 56 2 57 0 34 2693 7 32 2 49 0 34 2829 27 26 8 28 1 82 0 22 2611 8 04 1 77 0 22 2747 7 92 1 74 0 22 2829 7 68 1 69 0 22 2910 28 18 7 05 5 22 0 74 2176 6 75 5 00 0 74 2285 6 48 4 80 0 74 2394 6 24 4 62 0 74 2502 28 20 7 35 4 56 0 62 2285 7 05 4 37 0 62 2421 6 84 4 24 0 62 2475 6 60 4 09 0 62 2584 28 22 7 65 3 83 0 50 2366 7 38 3 69 0 50 2516 7 20 3 60...

Page 28: ... 27 24 6 90 2 35 0 34 2992 6 48 2 20 0 34 3128 6 30 2 14 0 34 3196 6 12 2 08 0 34 3264 27 26 7 26 1 60 0 22 3101 6 84 1 50 0 22 3237 6 63 1 46 0 22 3305 6 42 1 41 0 22 3373 28 18 5 88 4 35 0 74 2666 5 40 4 00 0 74 2829 5 19 3 84 0 74 2883 4 98 3 69 0 74 2938 28 20 6 18 3 83 0 62 2774 5 76 3 57 0 62 2910 5 55 3 44 0 62 2992 5 34 3 31 0 62 3074 28 22 6 54 3 27 0 50 2883 6 12 3 06 0 50 3046 5 91 2 96...

Page 29: ... 27 24 8 04 2 73 0 34 2503 7 74 2 63 0 34 2640 7 56 2 57 0 34 2723 7 32 2 49 0 34 2860 27 26 8 28 1 82 0 22 2640 8 04 1 77 0 22 2778 7 92 1 74 0 22 2860 7 68 1 69 0 22 2943 28 18 7 05 5 22 0 74 2200 6 75 5 00 0 74 2310 6 48 4 80 0 74 2420 6 24 4 62 0 74 2530 28 20 7 35 4 56 0 62 2310 7 05 4 37 0 62 2448 6 84 4 24 0 62 2503 6 60 4 09 0 62 2613 28 22 7 65 3 83 0 50 2393 7 38 3 69 0 50 2544 7 20 3 60...

Page 30: ... 27 24 6 90 2 35 0 34 3025 6 48 2 20 0 34 3163 6 30 2 14 0 34 3231 6 12 2 08 0 34 3300 27 26 7 26 1 60 0 22 3135 6 84 1 50 0 22 3273 6 63 1 46 0 22 3341 6 42 1 41 0 22 3410 28 18 5 88 4 35 0 74 2695 5 40 4 00 0 74 2860 5 19 3 84 0 74 2915 4 98 3 69 0 74 2970 28 20 6 18 3 83 0 62 2805 5 76 3 57 0 62 2943 5 55 3 44 0 62 3025 5 34 3 31 0 62 3108 28 22 6 54 3 27 0 50 2915 6 12 3 06 0 50 3080 5 91 2 96...

Page 31: ...PUT 15 3 40 1242 4 10 1490 4 81 1681 5 51 1815 6 21 1929 6 86 1986 7 56 2025 21 3 24 1337 3 89 1585 4 59 1757 5 24 1891 5 94 1986 6 59 2044 7 26 2120 26 2 92 1433 3 62 1681 4 27 1853 4 97 1986 5 67 2082 6 32 2139 7 02 2197 CAPACITY 5 4 KW INPUT 2010 W OUTDOOR WB INDOOR 10 5 0 5 10 15 20 DB Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 3 40 1307 4 10 1568 4 81 1769 5 51 1910 6 21 2030 ...

Page 32: ... to the room temperature at set time the operation starts When the system is stopped with the OPERATE STOP ON OFF button on the remote con troller and restarted within 2 hours in I FEEL CON TROL mode the system operates in previous mode automatically regardless of the room tempera ture Example Previous operation COOL mode of I FEEL CONTROL or COOL mode When the system is restarted after 2 hours an...

Page 33: ...r TOO COOL buttons when you feel too warm or too cool Each time the TOO WARM or TOO COOL button is pressed the indoor unit receives the signal and emits a beep tone Fuzzy control When the TOO COOL or TOO WARM button is pressed the microprocessor changes the set temperature consider ing the room temperature the frequency of pressing TOO COOL or TOO WARM button and the user s preference to heat or c...

Page 34: ...t Indoor fan Outdoor fan Compressor ON 8 min 1 min 4 min 3 min ON OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON ON 3 Coil frost prevention The operation is as same as coil frost prevention during COOL mode of I FEEL CONTROL Indoor fan operates at the set speed and the compressor stops for 5 minutes because protection Coil frost prevention has the priority However when coil frost prevention works ...

Page 35: ...ssure protection During heating operation the outdoor fan motor is controlled by the temperature of indoor coil thermistor RT12 temperature for excess rise protection of compressor discharge pressure Outdoor fan OFF 52 C MUCFH 13NV MUCFH 24NV 50 C MUCFH 18NV 56 C MUCFH 18NV Outdoor fan ON 48 C MUCFH 13NV MUCFH 24NV 46 C MUCFH 18NV 52 C MUCFH 18NV E4 E3 E3 E4 E4 E3 E3 E4 High pressure protection Re...

Page 36: ...e defrosting time exceeds 10 minutes 3 Defrosting time chart NOTE1 When the indoor coil thermistor reads above 18 C indoor fan operates at Very Low for 30 seconds When the indoor coil thermistor reads 18 C or less the indoor fan stops 3 1 or more 3 or less Compressor contactor Outdoor 52C X62 R V coil SR61 Outdoor fan Defrost counter Indoor fan Indoor vane ON OFF ON OFF ON OFF ON OFF ON OFF Positi...

Page 37: ...ATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with the OPERATION SELECT button 3 Press TEMPERATURE buttons TOO WARM or TOO COOL button to select the desired temperature The setting range is 16 31 C 4 Indoor fan speed control high pressure protection defrosting R V coil control are same as HEAT mode of I FEEL CONTRO...

Page 38: ... mode the microprocessor automatically determines the vane angle and operation to make the optimum room temperature distribution 1 In COOL and DRY operation 2 In HEAT operation Vane angle is fixed to position 1 Vane angle is fixed to position 4 4 1 1 2 3 4 5 5 STOP operation OFF and ON TIMER standby When the following cases occur the vane returns to the closed position a When the OPERATE STOP ON O...

Page 39: ...on AUTO START operation ON timer OFF TIMER button AUTO STOP operation OFF timer 4 Press HR and MIN button to set the timer Time setting is 10 minute units HR and MIN button will work when or mark is flashing These marks disappear in 1 minute After setting the ON timer check that OPERATION INDICATOR lamp of the indoor unit lights NOTE1 Be sure to place the remote controller at the position where it...

Page 40: ...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 9 7 EMERGENCY TEST OPERATION In case of test run operation or emergency operation use the EMERGENCY OPERATION switch on the front of the indoor unit Emergency operation is available when the remote controller is m...

Page 41: ...f the deicer P C board is cut the defrost interval time will be changed JRG When the JRG wire of the deicer P C board is cut the defrost temperature will be changed Refer to page 54 Jumper wire JPC JPE JRF JRG Model MUCFH 13NV MUCFH 18NV MUCFH 18NV MUCFH 24NV Change point Defrost interval time changes from 40 minutes to 15 minutes Defrost start temperature changes from 3 to 0 Defrost finish temper...

Page 42: ...times the abnormality indication is flashing on and off before starting service work 2 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 3 When troubleshooting refer to the flow chart and the check table on page 43 and 44 4 How to replace batteries Weak batteries may cause the remote con...

Page 43: ...Trouble of room temp erature indoor coil temperature thermistor 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Check room temperature thermistor and indoor coil tempera ture thermis tor Refer to Test point diagram and voltage on page 52 Refer to H Check of outdoor thermistor on page 51 MCHF 24NV 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer the deic...

Page 44: ...rol P C board Check deicer P C board Check electrical parts Check resistance of thermistor Re connect connector Check indoor electronic control P C board Check deicer P C board Check resistance of thermistor Re connect connector 4 Outdoor power system 5 time flash 2 5 second OFF Outdoor unit does not run When the compressor opera tion is continuously three times interrupted by over current protect...

Page 45: ...2Ω C R C S Normal Abnormal Open or short circuit 18 24NV WHT BLK Normal Abnormal Open or short circuit 102 126Ω 97 120Ω 18NV WHT BLK BLK RED 13NV 155 190Ω 364 446Ω 13NV 79 87Ω 175 190Ω BLK YLW 63 69Ω 66 72Ω YLW BLU 34 38Ω 45 50Ω BLU BRN 25 29Ω 30 33Ω BRN RED 13 15Ω 22 24Ω Abnormal Open or short circuit 13 18NV BLK REDORNWHT MAIN AUX P INNER PROTECTOR P BRN YLW PNK RED ORN BLU ROTOR Vane motor MV M...

Page 46: ...uit or open circuit Indoor unit operates by pressing the EMERGENCY OPERATION switch but does not operate with the remote con troller Replace the batteries Refer to page 42 Turn on a radio to AM and press switch on remote controller Is noise heard from radio Are there any fluorescent lights of inverter or rapid start type within the range of 1m Is the voltage approx 4V DC Replace the indoor electro...

Page 47: ...ssor and outdoor fan does not operate Start Press EMERGENCY OPERATION switch 3 minute time delay works Test run operation operates for 30 minutes Check the deicer P C board and compressor contactor 52C at first then check the outdoor fan motor and compressor Check the continuity of indoor and outdoor unit connection No No Yes Yes Check voltage to terminal block of indoor unit Is there 220 240V AC ...

Page 48: ...240V AC between 2 T1 on the compressor contactor 52C and N on the outdoor terminal block Yes Is there 220 240V AC between CN730 1 3 on the deicer P C board w1 Replace the deicer P C board Replace the deicer P C board No Yes No Is there 220 240V AC between 1 L1 on the compressor contactor 52C and N on the outdoor terminal block No No Make the connection of wiring correct Yes Yes Is there 220 240V A...

Page 49: ... DC between J9 J8 MUCFH 13 18NV J101 J401 MUCFH 24NV on the deicer P C board Is there 10V DC between both ends of R601 on the deicer P C board By tester the stylus is between 5 10V DC Replace the deicer P C board Rectify indoor outdoor unit connecting wire Check and rectify fuse and varistor on the deicer P C board Rectify indoor outdoor unit connecting wire Replace the indoor electronic control P...

Page 50: ... wiring correct Check of R V coil G After 3 minutes is there 220 240V AC between CN721 1 3 on the deicer P C board Replace the deicer P C board Yes No Replace the R V coil Disconnect the TAB52 on the deicer P C board Turn ON the power supply and operate the indoor unit in HEAT mode by pressing the EMERGENCY OPERATION switch After 3 minutes is there 220 240V AC between CN721 1 3 on the deicer P C b...

Page 51: ...or have the characteristics on page 45 No Yes Does the unit operate 10 minutes or more Replace the deicer P C board Ok W1 W1 It is thought defective contact of the connector Turn OFF the power supply Ambient temperature thermistor RT63 Defrost thermistor RT61 w Disconnect the connectors CN661 and or CN662 from the deicer P C board Check the characteristics of each thermistor H When OPERATION INDIC...

Page 52: ...C Resistance K TEST POINT DIAGRAM AND VOLTAGE MCFH 13NV MCFH 18NV MCFH 24NV E3 E3 E4 Indoor electronic control P C board Fan motor power supply 220 240V AC 7 5 6 4 3 2 1 8 Low High Fuse F11 250V AC 3 15A Power supply input 220 240V AC 12V DC 5V DC Time short point Indoor coil thermistor RT12 Room temperature thermistor RT11 Very Low Med JHA Release of AUTO RESTART FUNCTION Refer to page 42 Room te...

Page 53: ... 240V AC R601 5 10V DC Power supply input 220 240V AC Defrost thermistor RT61 Fuse F61 2A 250V Defrost interval time short pin JP607 R853 Refer to page 41 J9 J8 5V DC Jumper wire for change in defrost setting JPC JPE Refer to page 41 52C 12V DC 12V DC DEICER P C BOARD Outdoor deicer P C board ...

Page 54: ... 5V DC CN661 1 2 Defrost ther mistor RT61 Defrost thermistor RT61 Ambient temperature thermistor RT63 20 10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature Resistance k CN662 3 4 Ambient tempera ture thermistor RT63 Fan motor CN711 220 240V Varistor NR61 Refer to page 48 or 49 J101 J401 R V coil CN721 220 240V Power sup ply input CN7301 3 220 240V AC R601 10V DC Refer to page 49 Refer t...

Page 55: ...ck cover and remove the terminal block 4 Remove the screws of the electronic box cover 5 Pull out the electronic control P C board 2 Removing the indoor fan motor 1 Remove the grill Refer to 1 1 2 2 Remove the screws of the pipe support assembly 3 Remove the fan casing upper 4 Disconnect the connector of the indoor fan motor 5 Disconnect the ground wire of the fan motor 6 Remove the screws of the ...

Page 56: ...ly Photo 6 4 Remove the electronic box Refer to 1 5 Remove the indoor fan motor Refer to 2 6 Remove the screws of the motor support 7 Remove the fan casing Iower 8 Remove the insulation of the drain pan and remove the screws Photo 7 9 Remove the screws under the drain pan Photo 8 10 Remove the drain pan 11 Remove the indoor heat exchanger Photo 5 Photo 6 Photo 7 Photo 8 Screws Insulation and screw...

Page 57: ...ides 6 Remove the top panel 7 Remove the cabinet 2 Removing the deicer P C board 1 Remove the service panel and the cabinet 2 Disconnect all the connectors and the terminals on the deicer P C board 3 Remove the deicer P C board Photo 4 Terminal block Screws Deicer P C board Photo 1 Photo 3 Screws of the top panel Service panel Screws of the service panel Screws of the top panel Screws of the cabin...

Page 58: ...net Refer to 1 2 Remove the relay panel 3 Remove the soundproof felt 4 Remove the terminal cover on the compressor 5 Disconnect lead wires from the glass terminal of the com pressor 6 Recover gas from the refrigerant circuit 7 Disconnect the welded part of the discharge pipe 8 Disconnect the welded part of the suction pipe 9 Remove nuts fixing the compressor 10 Remove the compressor NOTE Before us...

Page 59: ...oving the deicer P C board 1 Remove the service panel and the cabinet 2 Disconnect all the connectors and the terminals on the deicer P C board 3 Remove the deicer P C board 12 3 MUCFH 18NV MUCFH 18NV OUTDOOR UNIT E4 E3 Photo 1 Photo 3 Photo 2 Black lead wire White lead wire Screws Screws Service panel Terminal block Screws Compressor Red lead wire Deicer P C board ...

Page 60: ...e soundproof felt 3 Remove the terminal cover on the compressor 4 Remove the electrical assembly Refer to 2 5 Recover gas from the refrigerant circuit 6 Disconnect the welded part of the discharge pipe 7 Disconnect the welded part of the suction pipe 8 Remove nuts fixing the compressor 9 Remove the compressor Photo 5 Terminal cover Compressor Discharge pipe Suction pipe Compressor nuts Photo 4 pro...

Page 61: ...move the screws of the cabinet Open the cabinet to a 45 degree angle Then lift it and unhook the catches to remove 3 Removing the propeller fan and the outdoor fan motor 1 Remove the cabinet Refer to 1 2 Remove the propeller fan nut and the propeller fan NOTE Loose the propeller fan in the rotating direction for removal When attaching the propeller fan align the mark on the propeller fan and the m...

Page 62: ... rear guard 4 Remove the screws of the separator support plate and the separator support plate 5 Remove the screws of the motor support and the motor support 6 Remove the relay panel Disconnect the fan motor lead wires 7 Remove the soundproof felt 8 Remove the screws of the separator and the separator 9 Recover gas from the refrigerant circuit 10 Remove the screws of the heat exchanger and the hea...

Page 63: ...ALLATION METAL R UNION LIQUID UNION LIQUID BACK PANEL NOZZLE INDOOR HEAT EXCHANGER VANE GRILLE CATCH 12 7 15 88 9 52 6 35 3PCS SET 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 2 1 1 1 2...

Page 64: ... 2 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 MF MF TB TB RT12 NR11 NR11 F11 12 13 E02 257 426 E02 576 426 E02 141 083 E02 527 083 REMOTE CONTROLLER REMOTE CONTROLLER REMOTE CONTROLLER HOLDER REMOTE CONTROLLER HOL...

Page 65: ... EXCHANGER CABINET GRILLE OUT COMPRESSOR COMPRESSOR RUBBER SET BASE STOP VALVE GAS STOP VALVE LIQUID 4 WAY VALVE SERVICE PANEL BACK PANEL MOTOR SUPPORT TOP PANEL CAPILLARY TUBE CAPILLARY TUBE RH 231VHAT 3RUBBERS SET 12 7 6 35 3 0 1 8 200 3 0 1 4 500 MC MUCFH 13NV E3 1 1 1 1 3 1 1 1 1 1 1 1 1 1 2 1 1 1 1 3 1 1 1 1 1 1 1 1 1 2 MUCFH 13NV E4 Part number that is circled is not shown in the illustratio...

Page 66: ...emarks Symbol in Wiring Diagram Q ty unit MUCFH 13NV E3 RA6V33 30 440VAC 2A 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MUCFH 13NV E4 1 2 3 4 5 6 7 8 9 PROPELLER FAN OUTDOOR FAN MOTOR DEFROST THERMISTOR COMPRESSOR CAPACITOR DEICER P C BOARD SURGE ABSORBER TERMINAL BLOCK OUT R V COIL FUSE MF RT61 C1 DSAR TB 21S4 F61 E02 336 501 E02 442 301 E02 440 310 E02 079 353 E02 445 451 E02 128 383 E02 198 374 E02 440...

Page 67: ...R HEAT EXCHANGER OUTDOOR HEAT EXCHANGER OUTDOOR HEAT EXCHANGER BACK PANEL CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE COMPRESSOR CONTACTOR FUSE SURGE ABSORBER R V COIL R V COIL CHECK VALVE CHECK VALVE 3RUBBERS SET 4RUBBERS SET RH 231VHAT NH 36VMDT 12 7 15 88 6 35 30 440VAC 50 440VAC RA6V40 RA6V50 3 0X 2 0X600 3 0X 2 0X250 3 0X 1 6X350 3 0X 1 6X750 2A 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1...

Page 68: ...68 MUCFH 24NV MUCFH 24NV E2 E1 8 1 4 5 6 2 3 7 18 11 10 12 15 13 16 17 20 21 23 24 14 25 9 19 13 9 OUTDOOR UNIT STRUCTURAL PARTS 13 10 ACCESSORY 22 33 34 ...

Page 69: ...OR RUBBER SET COMPRESSOR STOP VALVE LIQUID STOP VALVE GAS DEFROST THERMISTOR 4 WAY VALVE COMPRESSOR CONTACTOR FAN MOTOR RELAY OUTDOOR FAN CAPACITOR COMPRESSOR CAPACITOR DEICER P C BOARD THERMOSTAT SURGE ABSORBER CR SURGE ABSORBER CZ SURGE ABSORBER R V COIL CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE CHECK VALVE Symbol in Wiring Diagram Q ty unit 1 1 1 1 1 1 1 1 2 1 1 1 1 4 1 1 1 1 1 1...

Page 70: ...70 MUCFH 24NV 13 11 OUTDOOR UNIT STRUCTURAL PARTS E3 1 7 29 9 27 26 15 20 10 25 8 5 13 6 2 16 21 17 4 3 24 23 28 14 22 12 11 19 13 13 18 13 12 ACCESSORY 35 36 ...

Page 71: ...PELLER FAN NUT BASE STOP VALVE LIQUID STOP VALVE GAS CABINET HANDLE FAN GUARD COMPRESSOR RUBBER SET COMPRESSOR SERVICE PANEL COVER PANEL DEFROST THERMISTOR TERMINAL BLOCK OUTDOOR FAN CAPACITOR SURGE ABSORBER COMPRESSOR CONTACTOR COMPRESSOR CAPACITOR DEICER P C BOARD REAR PANEL REAR GUARD SIDE PANEL MOTOR SUPPORT CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE FUSE CHECK VALVE CHECK VALVE DISCHAGE PRE...

Page 72: ...Standard interval for the filter replacement is about 1 year 14 1 AIR CLEANING FILTER If the air cleaning filter is clogged it may lower the unit s capacity or cause condensation at the air outlet The air cleaning filter is disposable The standard usable term is about 4 months However if the color of the filter turns to dark brown replace soon Models MCFH 13NV MCFH 18NV MCFH 24NV E3 E3 E4 Part No ...

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