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SERVICE FUNCTIONS

10

10-1. COMPULSORY DEFROSTING MODE FOR SERVICE

By short circuit of the connector JP607 and R853(MSH-18RV)/ JPG1 and R871(MSH-24/30RV) on the outdoor deicer P.C.
board, defrosting mode can be accomplished regardless of the defrost interval restriction. (Refer to page 69 or 70.)
Defrost thermistor RT61 must read below -3°C.

10-2. CHANGE IN DEFROST SETTING

MUH-18RV
<JPC> When the JPC wire of the deicer P.C. board is cut, the defrost interval time will be changed.
<JPE> When the JPE wire of the deicer P.C. board is cut, the defrost temperature will be changed. (Refer to page 69.)
MUH-24/30RV
<JRF> When the JRF wire of 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 70.)

10-4. 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, P.C. boards of remote controller 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 :

MUH-18RV -

MUH-18RV -

Jumper wire

JPC

JPE

Model

Change point

Defrost interval time changes from 40 minutes to 15 minutes.

Defrost start temperature changes from -3

:

to 0

:

.

Defrost finish temperature changes from 3

:

to 10

:

.

E1

MUH-24RV -

MUH-30RV -

Jumper wire

JRF

JRG

Model

Change point

Defrost interval time changes from 40 minutes to 15 minutes.

Defrost start temperature does not change.(-3.0

:

)

Defrost finish temperature changes from 3

:

to 15

:

.(MSH-24RV)

Defrost finish temperature changes from 13

:

to 15

:

.(NSH-30RV)

E1

E1

E2

10-3. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board.
The time will be shortened as follows.

Set time : 1 minute

➔

1-second

Set time : 3 minute

➔

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.)

MSH-18RV -
MSH-24RV -
MSH-30RV -

E1

E1

E1

MUH-18RV -

MUH-18RV -

MUH-24RV -
MUH-30RV -

E1

E1

E2

E1

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, push the RESET button.

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 push the RESET
button.

OB272-2.qxp 02.1.26 1:23 PM Page 50

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Содержание MSH-18RV

Страница 1: ...RV MSH 24RV WH MUH 24RV MSH 30RV WH MUH 30RV E1 E1 E1 E1 E2 E1 E1 No OB272 REVISED EDITION A SPLIT TYPE HEAT PUMP AIR CONDITIONERS MSH 18RV MSH 24RV E1 E1 Revision MUH 18RV has been added MUH 18RV MUH 18RV Path of outdoor heat exchanger has changed E2 E1 E2 Refer to the Service Manual OB185 REVISED EDITION C when MSH 18RV is connected with MXZ 32NV or MXZ 32NV as multi system units Refer to the Se...

Страница 2: ...gency operation switch Operation indicator lamp Receiving section MSH 18RV MSH 24RV E1 E1 MSH 30RV E1 TECHNICAL CHANGES MSH 18NV MSH 18RV MSH 24NV MSH 24RV 1 Remote controller has changed SLEEP MODE function has removed ECONO COOL operation has added SWING button is removed but SWING MODE function is available by VANE CONTROL button MSH 30RV New model MUH 18NV MUH 18RV 1 Outdoor model name has cha...

Страница 3: ...plate Installation plate fixing screw 4 o 25 mm Remote controller mouting hardware Fixing screw for 3 o 3 5 o 1 6 mm Black Battery AAA for remote controller Wireless remote controller Felt tape Used for left or left rear piping 1 7 1 2 2 1 1 1 6 1 2 2 1 1 MSH 18RV MSH 24RV E1 MSH 30RV E1 E1 Outdoor unit 8 9 Drain socket Drain cap 33 Drain cap 16 1 6 1 2 1 MUH 18RV MUH 18RV E1 MUH 24RV MUH 30RV E1 ...

Страница 4: ...EEL COOL HEAT DRY PM CLOCK AM RESET CLOCK Open 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 ECONO COOL button VANE CONTROL button CLOCK SET button ...

Страница 5: ...ESET CLOCK Open 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 ECONO COOL button VANE button Horizontal vane button CLOCK SET button LONG button WIDE VANE button Vertical vane button ...

Страница 6: ...6 MSH 24RV E1 Single phase 220 240V 50Hz 816 726 630 25 98 59 0 29 RA4V27 EE WHT BLK 183 3 BLK RED 250 5 1 015O320O190 14 5 45 42 38 1 260 1 140 1 020 3 10 10 MUH 24RV E1 2 640 2 760 2 100 2 250 0 58 NH 47VMDT 2 200 C R 0 96 C S 2 07 RA6V85 AA WHT BLK 62 7 BLK YLW 30 2 YLW RED 62 9 870o850o295 72 53 720 750 570 610 2 2 40 1 200 MS32N1 33 18 33 18 Cooling 6 0 3 1 12 6 11 7 2 720 2 750 2 21 2 18 11 ...

Страница 7: ... k K h A A W mm kg dB rpm kg cc k k k MSH 30RV E1 Single phase 220 240V 50Hz 25 82 84 0 33 0 35 RC4V40 AA WHT BLK 138 2 BLK RED 159 0 1 100O325O227 16 5 47 43 39 3 10 10 10 MUH 30RV E1 0 56 0 58 NH 56VNHT 2 700 C R 0 66 C S 1 58 RA6V75 AA WHT BLK 62 8 BLK YLW 55 9 YLW RED 26 0 870o850o295 79 55 790 820 420 450 2 2 30 1 200 MS32N1 33 18 231 44 33 18 Cooling 8 3 4 5 960 822 684 15 3 15 5 3 300 3 460...

Страница 8: ...re 20 Wet bulb temperature 15 5 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR MSH 18RV E1 MSH 24RV E1 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb temperature 35 Wet bulb temperature 24 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 52 SPL dB A LINE High NOTCH Heating D...

Страница 9: ...re 19 47 SPL dB A LINE High NOTCH Heating Dry bulb temperature 20 Wet bulb temperature 15 5 MSH 30RV E1 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb temperature 35 Wet bulb temperature 24 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 55 SPL dB A LINE High NOTCH Heating Dry bulb ...

Страница 10: ...allation plate Liquid line 8 0 5m Gas line 12 0 43m Insulation 50 O D 28 I D Insulation 28 Drain hose 16 Air out Air in Wireless remote controller 162 19 58 100mm or more 100mm or more 100mm or more 350mm or more 500mm or more Drainage 3holes 33 Air out Air in Air in Service panel Liquid refrigerant pipe joint Refregerant pipe flared 6 35 Gas refregerant pipe joint Refregerant pipe flared 15 88 3 ...

Страница 11: ...53 791 56 1068 1100 325 Air out Air in Insulation 28 Drain hose 16 Connected part O D Liquid line 9 52 0 5m Gas line 19 0 43m Insulation 50 O D 32 I D Installation plate Wall hole 75 Wireless remote controller Installation plate Indoor unit INDOOR UNIT MSH 30RV E1 Unit mm ...

Страница 12: ...5 39 5 27 5 Terminal block for indoor and outdoor unit connection Terminal block for power line MUH 30RV only 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 42 45 104 33 Bottom piping hole 2 U shaped notched holes Drain hole 33 ...

Страница 13: ...E 93 DC DC CONVERTER SYMBOL IC141 MF MV NR11 RT11 NAME HYBRID IC INDOOR FAN MOTOR INNER FUSE VANE MOTOR VARISTOR ROOM TEMPERATURE THERMISTOR SYMBOL RT12 TB 52C NAME INDOOR COIL TEMPERATURE THERMISTOR TERMINAL BLOCK CONTACTOR L FROM INDOOR UNIT CONNECTING 12V 3 TB RED RED RED ORN WHT BLK RT61 F61 X62 1 1 2 3 4 1 2 3 4 CN730 CN661 CN721 CN720 SR61 CN711 TAB21 TRANS TAB20 RED S C R MC MF BLK BLK BLU ...

Страница 14: ...ut the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Connector Terminal block NOTES SYMBOL C1 C65 DSAR F61 IC881 NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 2A DC DC CONVERTER SYMBOL MC MF NR61 RT61 SR61 NAME COMPRESOR INNER PROTECTOR OUTDOOR FAN MOTOR INNER P...

Страница 15: ...ISTOR ROOM TEMPERATURE THERMISTOR SYMBOL RT12 TB 52C NAME INDOOR COIL THERMISTOR TERMINAL BLOCK CONTACTOR PE CIRCUIT BREAKER DEICER P C BOARD 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 N 2 3 Symbols below indicate Terminal block Connector WHT WHT CZ RED GRN YLW COM NO T61 BLU ORN C2 ...

Страница 16: ...copper conductors only For field wiring 2 Since the indoor and outdoor unit connecting wires have polarity connect them according to the numbers 3 N L 3 Symbols below indicate Terminal block Connector SG79J149H02 MUH 30RV E1 MODEL WIRING DIAGRAM INDOOR UNIT TB TAB12 3 3 REMOTE CONTROLLER RECEIVER P C BOARD DISPLAY P C BOARD 102 CN 101 CN RED BLU MV2 GRN YLW TO OUTDOOR UNIT CONNECTING 12V CN201 3 2...

Страница 17: ...ant flow in heating Strainer Distributor 4 way valve MSH 24RV E1 MUH 24RV E1 INDOOR UNIT OUTDOOR UNIT Indoor heat exchanger Room temperature thermistor RT11 Refrigerant pipe 15 88 with heat insulator Flared connection Flared connection Indoor coil thermistor RT12 Refrigerant pipe 9 52 with heat insulator Stop valve Strainer Check valve Check valve Capillary tube 3 0X 1 6X350 Capillary tube 4 0X 2 ...

Страница 18: ... RT12 main LEV R V coil heating ON cooling OFF Strainer Strainer Strainer Check valve Accumulator Ambient temperature thermistor RT63 Strainer Capillary tube 4 2 3 0 50 Model Piping size O D mm Length of connecting pipe m Refrigerant piping Max length m A 15 30 Indoor unit Gas 0 43 Liquid 0 5 Gas 15 88 Liquid 6 35 9 52 Outdoor unit Gas 0 Liquid 0 MSH 18RV E1 MUH 18RV E1 MSH 24RV E1 MUH 24RV E1 MSH...

Страница 19: ...Refrigerant piping length m 7 Model MSH 24RV E1 MUH 24RV E1 Refrigerant piping length one way Outdoor unit precharged 2 400 15m 520 7m 0 10m 195 Calculation Xg 65g m Refrigerant piping length m 7 Outdoor unit precharged 0 195 520 Refrigerant piping length one way 15m 10m 7m Model MSH 30RV 2 300 E1 20m 25m 30m 845 1495 1170 MUH 30RV E1 Calculation Xg 65g mo Refrigerant piping length m 7 ...

Страница 20: ... page shows the differ ence between the indoor intake 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 intake as shown in the figure and at least 2 sets of wet and dry bulb thermometers to the...

Страница 21: ...essure has been changed to MPa on the international system of units SI unit system The conversion factor is 1 MPa Gauge 10 2 kgf f f Gauge 15 20 50 25 60 30 70 35 0 3 0 4 0 5 0 6 0 7 18 32 220V 240V 7 6 5 4 3 15 20 50 25 60 30 70 35 6 7 8 9 10 11 18 32 220V 240V MUH 18RV MUH 18RV E2 E1 MUH 18RV MUH 18RV E2 E1 Outdoor low pressure Ambient temperature C Ambient humidity Ambient temperature C Ambient...

Страница 22: ... 11 10 9 Outdoor unit current A Ambient temperature C MUH 24RV E1 220V 240V MUH 30RV E1 Ambient temperature C Ambient humidity 15 18 20 50 25 60 30 32 70 35 0 2 0 3 0 4 0 5 0 6 220 240V 2 3 4 5 6 Ambient temperature C Ambient humidity 15 18 20 50 25 60 30 32 70 35 10 11 12 13 14 15 16 17 220V 240V Outdoor low pressure Outdoor unit current A kgf F Gauge MPa Gauge MUH 30RV E1 Ambient temperature C 7...

Страница 23: ... 1949 2050 1705 1807 1878 1949 2050 1705 1807 1878 1949 2050 1705 1807 1878 1949 2050 1705 1807 1878 1949 2050 5 51 5 81 5 51 5 81 6 12 5 51 5 81 6 12 5 51 5 81 6 12 6 43 5 51 5 81 6 12 6 43 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 2 64 2 09 2 86 2 33 1 71 3 08 2 56...

Страница 24: ...2172 2274 2335 2416 2111 2172 2274 2335 2416 2111 2172 2274 2335 2416 4 41 4 72 4 41 4 72 5 02 4 41 4 72 5 02 4 41 4 72 5 02 5 36 4 41 4 72 5 02 5 36 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 2 12 1 70 2 29 1 89 1 41 2 47 2 08 1 61 2 65 2 26 1 81 1 29 2 82 2 45 2 01 ...

Страница 25: ... 2035 2141 1781 1887 1961 2035 2141 1781 1887 1961 2035 2141 1781 1887 1961 2035 2141 1781 1887 1961 2035 2141 5 51 5 81 5 51 5 81 6 12 5 51 5 81 6 12 5 51 5 81 6 12 6 43 5 51 5 81 6 12 6 43 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 5 51 5 81 6 12 6 43 6 73 2 64 2 09 2 86 2 33 1 71 3 08 2 56...

Страница 26: ...2268 2374 2438 2523 2205 2268 2374 2438 2523 2205 2268 2374 2438 2523 4 41 4 72 4 41 4 72 5 02 4 41 4 72 5 02 4 41 4 72 5 02 5 36 4 41 4 72 5 02 5 36 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 4 41 4 72 5 02 5 36 5 64 2 12 1 70 2 29 1 89 1 41 2 47 2 08 1 61 2 65 2 26 1 81 1 29 2 82 2 45 2 01 ...

Страница 27: ...2747 2285 2421 2516 2611 2747 2285 2421 2516 2611 2747 2285 2421 2516 2611 2747 2285 2421 2516 2611 2747 6 48 6 84 6 48 6 84 7 20 6 48 6 84 7 20 6 48 6 84 7 20 7 56 6 48 6 84 7 20 7 56 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 3 05 2 39 3 30 2 67 1 94 3 56 2 94 2 23 ...

Страница 28: ... 2829 2910 3046 3128 3327 2829 2910 3046 3128 3327 2829 2910 3046 3128 3327 5 19 5 55 5 19 5 55 5 91 5 19 5 55 5 91 5 19 5 55 5 91 6 30 5 19 5 55 5 91 6 30 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 2 44 1 94 2 65 2 16 1 60 2 85 2 39 1 83 3 06 2 61 2 07 1 45 3 27 2 83...

Страница 29: ...2778 2310 2448 2544 2640 2778 2310 2448 2544 2640 2778 2310 2448 2544 2640 2778 2310 2448 2544 2640 2778 6 48 6 84 6 48 6 84 7 20 6 48 6 84 7 20 6 48 6 84 7 20 7 56 6 48 6 84 7 20 7 56 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 6 48 6 84 7 20 7 56 7 92 3 05 2 39 3 30 2 67 1 94 3 56 2 94 2 23 ...

Страница 30: ... 2860 2943 3080 3163 3273 2860 2943 3080 3163 3273 2860 2943 3080 3163 3273 5 19 5 55 5 19 5 55 5 91 5 19 5 55 5 91 5 19 5 55 5 91 6 30 5 19 5 55 5 91 6 30 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 5 19 5 55 5 91 6 30 6 63 2 44 1 94 2 65 2 16 1 60 2 85 2 39 1 83 3 06 2 61 2 07 1 45 3 27 2 83...

Страница 31: ... 22 0 20 3333 10 96 2 19 0 20 3432 10 62 2 12 0 20 3531 28 18 9 75 7 02 0 72 2640 9 34 6 72 0 72 2772 8 96 6 45 0 72 2904 8 63 6 22 0 72 3036 28 20 10 17 6 10 0 60 2772 9 75 5 85 0 60 2937 9 46 5 68 0 60 3003 9 13 5 48 0 60 3135 28 22 10 58 5 08 0 48 2871 10 21 4 90 0 48 3053 9 96 4 78 0 48 3135 9 55 4 58 0 48 3267 28 24 11 12 4 00 0 36 3003 10 71 3 85 0 36 3168 10 46 3 76 0 36 3267 10 13 3 65 0 3...

Страница 32: ...20 4010 8 88 1 78 0 20 4092 28 18 8 13 5 86 0 72 3234 7 47 5 38 0 72 3432 7 18 5 17 0 72 3498 6 89 4 96 0 72 3564 28 20 8 55 5 13 0 60 3366 7 97 4 78 0 60 3531 7 68 4 61 0 60 3630 7 39 4 43 0 60 3729 28 22 9 05 4 34 0 48 3498 8 47 4 06 0 48 3696 8 18 3 92 0 48 3762 7 89 3 78 0 48 3828 28 24 9 55 3 44 0 36 3630 8 96 3 23 0 36 3795 8 72 3 14 0 36 3878 8 47 3 05 0 36 3960 28 26 10 04 2 41 0 24 3762 9...

Страница 33: ...98 10 62 2 12 0 20 3702 28 18 9 75 7 02 0 72 2768 9 34 6 72 0 72 2906 8 96 6 45 0 72 3045 8 63 6 22 0 72 3183 28 20 10 17 6 10 0 60 2906 9 75 5 85 0 60 3079 9 46 5 68 0 60 3149 9 13 5 48 0 60 3287 28 22 10 58 5 08 0 48 3010 10 21 4 90 0 48 3201 9 96 4 78 0 48 3287 9 55 4 58 0 48 3425 28 24 11 12 4 00 0 36 3149 10 71 3 85 0 36 3322 10 46 3 76 0 36 3425 10 13 3 65 0 36 3598 28 26 11 45 2 75 0 24 332...

Страница 34: ...0 72 3598 7 18 5 17 0 72 3668 6 89 4 96 0 72 3737 28 20 8 55 5 13 0 60 3529 7 97 4 78 0 60 3702 7 68 4 61 0 60 3806 7 39 4 43 0 60 3910 28 22 9 05 4 34 0 48 3668 8 47 4 06 0 48 3875 8 18 3 92 0 48 3944 7 89 3 78 0 48 4014 28 24 9 55 3 44 0 36 3806 8 96 3 23 0 36 3979 8 72 3 14 0 36 4066 8 47 3 05 0 36 4152 28 26 10 04 2 41 0 24 3944 9 46 2 27 0 24 4117 9 17 2 20 0 24 4204 8 88 2 13 0 24 4290 29 18...

Страница 35: ... 34 8 06 2618 2742 2841 MSH 24RV MUH 24RV 220V E1 E1 NOTE Q Total capacity kW INPUT Total power input W DB Dry bulb temperature 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 CAPACITY 6 2 KW INPUT 2580 W 15 21 26 3 91 3 72 3 35 1677 1806 1935 4 71 4 46 4 15 2012 2141 2270 5 52 5 27 4 90 2270 2374 2503 6 32 6 01 5 70 2451 2554 2683 7 13 6 82 6 51 2606...

Страница 36: ...OO WARM Signal transmitting section Operation display section OPERATE STOP ON OFF button TEMPERATURE buttons MSH 18RV MSH 24RV E1 E1 MSH 30RV E1 ON OFF FAN TOO WARM TOO COOL VANE MODE ECONO COOL STOP START HR MIN WIDE VANE LONG I FEEL COOL HEAT DRY PM CLOCK AM RESET CLOCK OPERATION SELECT button FAN SPEED CONTROL button OFF TIMER button HR button MIN button TIME SET button ON TIMER button RESET bu...

Страница 37: ... to 25 24 Initial room temperature minus 2 Initial room temperature minus 2 1 4 The initial set temperature is decided by the initial room temperature 1 When the system is restarted with the remote controller the system operates with the previous set temperature regard less of room temperature at restart The set temperature is calculated by the previous set temperature 5 TEMPERATURE buttons In I F...

Страница 38: ...hart Example 4 Discharge temperature protection MSH 30RV The compressor is controlled by the temperature of discharge temperature thermistor RT62 for excess rise protection of compressor discharge pressure Compressor When the temperature of discharge temperature thermistor RT62 goes to 120 or more the compressor is turned OFF After 3 minutes since the compressor has been turned OFF if the temperat...

Страница 39: ...s as follows Set temperature minus room temperature 2 degrees or more High Set temperature minus room temperature Between 1 and 2 degrees Med Set temperature minus room temperature less than 1 degree Low 2 Cold air prevention control The fan runs at set speed when the indoor coil thermistor RT12 temperature exceeds 22 C The fan operates Low when the temperature of indoor coil thermistor RT12 is be...

Страница 40: ...frost thermistor RT61 NOTE 2 When connected to MXZ 32NV MXZ 32NV MXZ 32RV or MXZ 32SV outdoor unit the indoor unit send the data for the temperature to the outdoor unit according to the indoor coil thermistor RT12 temperature For the further information refer to the service manual No OB185 REVISED EDITION C Outdoor unit MXZ 32NV or MXZ 32NV No OB227 REVISED EDITION B Outdoor unit MXZ 32RV or No OB...

Страница 41: ...efrost counter Indoor fan Indoor vane ON OFF ON OFF ON OFF ON OFF ON OFF Horizontal Set position Max 10 min 30 sec 15 sec 30 sec 5 sec NOTE1 5 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 Under the heat operat...

Страница 42: ...function when the room temperature is 13 C or below 9 4 HEAT OPERATION 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 d...

Страница 43: ... the fan speed is switched the rotational frequency changes smoothly 2 Fan motor lock up protection When the rotational frequency feedback signal has not output for 12 seconds or when the microprocessor cannot detect the signal for 12 seconds the fan motor is regarded locked up Then the electric current to the fan motor is shut off 3 minutes later the electric current is applied to the fan motor a...

Страница 44: ...ne swings in various cycle according to the temperature of indoor heat exchanger Tp w 1 SWING operation makes you feel cooler than set temperature So even though the set temperature is higher than that in COOL mode the air conditioner can keep comfort As a result energy can be saved ECONO COOL operation is cancelled when the ECONO COOL button is pressed once again or VANE CONTROL button MSH 18 24R...

Страница 45: ...nge as follows by pressing the WIDE VANE button 3 Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle Confirming of standard position is performed in case of follows a When the OPERATE STOP ON OFF button is pressed POWER ON OFF b When the SWING is started or finished c When the power supply turns ON 4 SWING MODE By selecting S...

Страница 46: ...ace the remote controller at the position where its signal can reach the air conditioner even during TIMER operation or the set time may deviate within the range of about 10 minutes NOTE2 Reset the timer in the following cases or the set time may deviate and other malfunctions may occur A power failure occurs The circuit breaker functions 2 Cancel TIMER setting can be cancelled with the ON OFF TIM...

Страница 47: ... the test run operation This operation is for servicing The indoor fan speed runs at High speed and the system is in continuous operation The thermostat is ON After 30 minutes of test run operation the system shifts to EMERGENCY COOL HEAT MODE with a set temperature of 24 C The fan speed shifts to Med speed The coil frost prevention works even in emergency operation and defrosting too In the test ...

Страница 48: ...d LEV opening is corrected to be once every 2 minutes so that discharge temperature becomes the target discharge temperature When the discharge temperature is lower than target one LEV is corrected in closed direction when the discharge temperature is higher than target one LEV is corrected in opening direction At thermostat OFF Opening in stop 150 pulse LEV is set to the initial opening after abo...

Страница 49: ...us as follows Tb HEAT COOL Normal COOL RT is less than 2 or RT is 2 or more and less than 3 COOL RT is 3 or more NOTE Target discharge temperature Tb 93 93 75 65 Operation mode NOTE Opening increases and decreases to be in the target discharge temperature during operation Opening completely Positioning Power ON Initial opening Standard opening Remote controller ON Operation Thermostat OFF Standard...

Страница 50: ...ard Remove batteries before modification The board has a print as shown below MUH 18RV MUH 18RV Jumper wire JPC JPE Model Change point Defrost interval time changes from 40 minutes to 15 minutes Defrost start temperature changes from 3 to 0 Defrost finish temperature changes from 3 to 10 E1 MUH 24RV MUH 30RV Jumper wire JRF JRG Model Change point Defrost interval time changes from 40 minutes to 15...

Страница 51: ...ailure occurs while AUTO START STOP timer is active the timer setting is cancelled If the unit has been off with the remote controller before power failure the auto restart function does not work as the power button of the remote controller is off To prevent breaker off due to the rush of starting current systematize other home appliances not to turn on at the same time When some air conditioners ...

Страница 52: ...the batteries to operate the remote controller normally 1 Remove the front lid and insert batteries Then re attach the front lid Lead wiring Housing point MSH 18RV MUH 18RV MUH 18RV MSH 24RV MUH 24RV MSH 30RV MUH 30RV E1 E1 E1 E1 E2 E1 E1 NOTE2 INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT MXZ 32NV MXZ 32NV MXZ 32RV MXZ 32SV Multi system air conditioner Outdoor unit MXZ 32NV MXZ 32NV M...

Страница 53: ...ote controller and receiver P C board on page 59 Flash on and off at 0 5 second intervals Cause Indoor Outdoor unit Mis wiring 2 time flash Cause Indoor unit Trouble of room temp erature indoor coil thermistor 3 time flash Cause Indoor unit Trouble of indoor fan motor 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Refer to G How to check mis wiring and serial signal error Wh...

Страница 54: ...r control system Refer to H How to check mis wiring When outdoor unit doesn t work on page 65 Check room temperature thermistor and indoor coil thermis tor Refer to Test point diagram and voltage on page 67 or 68 Refer to A Check of indoor fan motor on page 59 Refer to J Check of outdoor thermistor on page 66 Replace the deicer P C board MSH 30RV 10 time flash Cause Outdoor unit Trouble of low dis...

Страница 55: ...ck connector CN121 to make sure rotational frequency feedback signal of 1 5V or over exists Check indoor electronic control P C board Check indoor fan motor Re connect connector Check outdoor DEICER P C board Check resistance of thermistor Re connect connector 2 3 5 Outdoor power system 5 time flash 2 5 second OFF Outdoor unit does not run When the compressor opera tion is continuously three times...

Страница 56: ... How to check mis wiring on page 65 Refer to G How to check mis wiring and serial signal error on page 64 3 Indoor fan motor 7 Low discharge temperature protection MSH 30RV When discharge temperature has been 50 or less on cool operation or has been 49 or less on heat operation for 20 minutes Abnormal point Outdoor unit does not operate Room tempera ture thermistor 2 time flash 2 5 second OFF Dete...

Страница 57: ...ircuit Terminal Normal 0 90Ω 1 12Ω 1 79Ω 2 21Ω C R MUH 18RV 0 84Ω 1 04Ω 1 82Ω 2 24Ω MUH 24RV C S Normal Abnormal Open or short circuit 176Ω 192Ω 240Ω 261Ω WHT BLK BLK RED Color of lead wire BRN YLW YLW GRY Normal 4 5 5 5V Abnormal Remain 0V or 5V When fan revolved one time 0V 5V 0V Approx Color of lead wire Normal Abnormal Open or short circuit 97Ω 120Ω MUH 18RV 102Ω 126Ω WHT BLK BLK RED BLK YLW N...

Страница 58: ...rmal 5 k 60 k Abnormal Open or short circuit Motor part Sensor part Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Color of lead wire BRN YLW YLW GRY Abnormal Remain 0V or 5V Normal 4 5 5 5V Measure the voltage power ON When fan revolved one time 0V 5V 0V Approx Measure the resistance between the terminals with a tester Part temperature 10 C 40 C Color of lea...

Страница 59: ...ltage between receiver P C board connector No 2 and No 1 MSH 18 24RV CN301 No 1 and No 3 MSH 30RV when the remote controller button is pressed Is the voltage approx 4V DC Replace the indoor electronic control P C board Replace the receiver P C board Replace the remote controller Re install the unit away from lights Attach a filter on receiving part Yes 0 or No others Yes No Yes No Switch on the re...

Страница 60: ...ace the indoor electronic control P C board Is winding resistance of fan motor 0 Is winding resistance of vane motor 0 No Yes Replace the vane motor No Yes Yes Is varistor NR11 burnt Replace the varistor Yes Turn OFF the power supply Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P C board and turn ON the power supply No No Does the unit o...

Страница 61: ...tor 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 AC between CN711 1 3 or 2 3 on the deicer P C ...

Страница 62: ...ck Yes 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 Yes Is there 220 240V AC between CN711 1 3 or 2 3 on the deicer P C board w1 Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch No Make the c...

Страница 63: ...nection of wiring correct 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 board Repla...

Страница 64: ... 10V DC between both ends of R601 on the deicer P C board Refer to page 69 or 70 2 By tester the stylus is between 5 10V Replace the deicer P C board Rectify in out connecting wire Check and rectify the fuse and the varistor on the outdoor deicer P C board Rectify in out connecting wire Replace the indoor electronic control P C board 1 Short circuit of JPG and JPS on the indoor electronic control ...

Страница 65: ...ontrol P C board Is there 220 240V AC between L N on the outdoor terminal block No Check the outdoor power supply and connection of wiring Is there 5V DC between J101 J401 on the deicer P C board Refer to page 70 Yes No Replace the deicer P C board Yes No Make the wiring between CN730 on the deicer P C board and outdoor terminal block correct Refer to page 70 Replace the deicer P C board Yes Yes Y...

Страница 66: ...rection Is LEV coil properly fixed to the body Ok Do you hear LEV click click Do you touch LEV and feel it vibrate Does the resistance of LEV coil have the characterictics No Yes Yes Yes No LEV CN724 WHT RED RED ORN YLW BRN BRN BLU Resistance 30 3 37 0 Characteristics of LEV coil No Properly fix LEV coil to the body Replace the deicer P C board NOTE After check of LEV do the undermentioned operati...

Страница 67: ...11 250V AC 3 15A Power supply input 220 240V AC 5V DC Indoor coil thermistor RT12 Emergency operation switch 12V DC P C board 0 20V DC R132 Room temperature thermistor RT11 Resistance k C144 C144 JPG JP41 Timer short mode point JPS JPG Refer to page 50 How to set Auto restart function Cut the Resistor JR06 Refer to page 51 ...

Страница 68: ...V AC 5V DC Indoor coil thermistor RT12 main Timer short mode point JPS JPG Refer to page 50 Emergency operation switch 12V DC Indoor coil thermistor RT12 main RT13 sub Room temperature thermistor RT11 Resistance k Room temperature thermistor RT11 How to set Auto restart function Cut the Resistor JR07 Refer to page 51 Indoor coil thermistor RT13 sub PS132 ...

Страница 69: ...220 240V AC R601 5 10V DC Refer to page 64 220 240V AC Fuse 2A 250V Defrost interval time short pin JP607 R853 Refer to page 50 J9 J8 5V DC Jumper wire for change in defrost setting JPC JPE Refer to page 50 52C 12V DC 12V DC CN661 1 2 Defrost thermistor RT61 Refer to page 66 Refer to page 64 ...

Страница 70: ... 30 40 50 60 70 80 90 100110120 0 100 200 300 400 500 600 700 800 900 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 MSH 30RV only CN662 1 2 Discharge temper ature thermistor RT62 Refer to page 66 CN662 3 4 Ambient tempera ture thermistor RT63 Refer to page 66 LEV connector CN724 Fan motor connector CN711 Va...

Страница 71: ...res on the electronic control P C board 9 Remove the electronic control P C board and display P C board Photo 2 Photo 1 Front panel Screws Screw of the termi nal block Indoor coil thermistor Indoor electronic control P C board Screw of the ground wire Receiver holder Receiver P C board Display P C board Lamp holder 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with...

Страница 72: ...ove the front panel 2 Remove the electrical box 3 Unhook the catches on the both sides of the nozzle assem bly 4 Remove the nozzle assembly 5 Remove the screws of the bearing support 6 Remove the screw of the heat exchanger unhook the catch 7 Lifting the heat exchanger remove the bearing support 8 Loose the screw fixing the line flow fan remove the line flow fan 9 Remove the screws of the motor ba...

Страница 73: ...holder Screw of the termi nal block Receiver P C board 2 Removing the electronic control P C board the receiver P C board and the display P C board 1 Remove the front panel Refer to 1 2 Remove the screw of the electrical cover Remove the electrical cover 3 Remove the screw of the V A clamp Remove the V A clamp 4 Remove the screw of the terminal block 5 Remove the screw of the ground wire 6 Disconn...

Страница 74: ...ut the drain hose from the nozzle assembly remove the nozzle assembly 6 Remove the screws of the vane motor disconnect the con nector 7 Remove the vane motor Screws fixing the fan motor 5 Removing the line flow fan and the indoor fan motor 1 Remove the front panel Refer to 1 2 Remove the electrical box Refer to 3 3 Pull out the drain hose from the nozzle assembly remove the nozzle assembly 4 Remov...

Страница 75: ...g 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 MUH 18RV MUH 18RV OUTDOOR UNIT E2 E1 Photo 1 Photo 3 Photo 2 Black lead wire White lead wire Screws Screws Service panel Terminal block Screws Compressor capacitor Red lead wire Deicer P C board ...

Страница 76: ...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...

Страница 77: ...t 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 motor shaft cut section Set the propeller fan i...

Страница 78: ...he screws of the side panel and the side panel 3 Remove the screws of the rear guard and the 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 Rec...

Страница 79: ...0 E02 143 234 E02 138 000 E02 138 010 E02 143 067 E02 141 100 E02 516 007 Part number that is circled is not shown in the illustration 1 2 3 4 5 6 MSH 18RV WH MSH 24RV WH 13 1 INDOOR UNIT STRUCTURAL PARTS E1 E1 E02 141 620 E02 138 667 E02 176 667 E02 138 666 8 9 10 INDOOR HEAT EXCHANGER UNION LIQUID UNION LIQUID UNION GAS 6 35 9 52 15 88 1 1 1 1 1 1 9 10 8 13 2 INDOOR UNIT HEAT EXCHANGER 13 1 INDO...

Страница 80: ...AN MOTOR FAN MOTOR RUBBER MOUNT DISPLAY P C BOARD VARISTOR FUSE THERMAL FUSE THERMAL FUSE SURGE ABSORBER SURGE ABSORBER Part No Symbol in Wiring Diagram Part Name RT12 MV TB TB RT11 MF MF NR11 F11 F12 F12 DSAR DSAR Q ty unit MSH 18RV 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 WH E1 MSH 24RV WH E1 AUTO RESTART AUTO RESTART RA4V27 RA4V27 2PCS SET 3 15A 93 93 Rema...

Страница 81: ...FAN MOTOR SUPPORT COMPRESSOR RUBBER SET COMPRESSOR BASE STOP VALVE GAS STOP VALVE LIQUID SERVICE PANEL 4 WAY VALVE COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR TERMINAL BLOCK DEICER P C BOARD DEFROST THERMISTOR COMPRESSOR CONTACTOR CAPILLARY TUBE CAPILLARY TUBE FUSE R V COIL SURGE ABSORBER CHECK VALVE 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 MC C1 MF TB RT61 52C F61 21S4 DSAR 4RUBBERS SET PH 36...

Страница 82: ...82 MUH 24RV 13 6 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS E1 1 5 28 6 26 25 24 8 2 20 17 3 23 22 27 9 21 19 7 8 8 18 13 14 15 16 10 11 12 4 ...

Страница 83: ... 29 30 31 32 33 TOP PANEL AMBIENT TEMPERATURE THRMISTOR OUTDOOR HEAT EXCHANGER OUTDOOR FAN MOTOR PROPELLER FAN BASE CABINET HANDLE FAN GUARD 4 WAY VALVE R V COIL DEFROST THERMISTOR COMPRESSOR RUBBER SET COMPRESSOR STOP VALVE LIQUID STOP VALVE GAS SERVICE PANEL COVER PANEL TERMINAL BLOCK OUTDOOR FAN CAPACITOR SURGE ABSORBER COMPRESSOR CONTACTOR COMPRESSOR CAPACITOR DEICER P C BOARD REAR PANEL REAR ...

Страница 84: ...P PANEL Symbol in Wiring Diagram Q ty unit Including No 4 5 6 4PCS SET 3PCS SET Remarks Part No NO Part Name 1 2 3 4 5 6 7 8 9 1 1 1 4 3 1 2 1 1 WH 13 8 INDOOR UNIT HEAT EXCHANGER 2 4 5 7 6 1 10 8 11 12 3 CATCH SCREW CAP E02 527 620 E02 527 666 E02 527 667 INDOOR HEAT EXCHANGER UNION GAS UNION LIQUID 15 88 9 52 10 11 12 1 1 1 13 8 INDOOR UNIT HEAT EXCHANGER 13 7 INDOOR UNIT STRUCTURAL PARTS Option...

Страница 85: ... TEMPERATURE THERMISTOR TERMINAL BLOCK INDOOR COIL THERMISTOR VANE MOTOR SUPPORT SET RIGHT VANE MOTOR SUPPORT SET LEFT Symbol in Wiring Diagram Q ty unit 3 15A RC4V40 Including RUBBER MOUNT RIGHT LEFT UP DOWN AUTO RESTART Including No 16 Remarks Part No NO Part Name F11 NR11 MF MV2 MV1 RT11 TB RT12 RT13 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 WH Part numbers that are circled are not shown in t...

Страница 86: ...86 MUH 30RV 13 11 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS E1 1 3 5 28 2 26 25 10 13 7 24 6 29 8 4 2 14 20 15 12 11 23 22 27 9 21 17 16 19 18 A B 9 31 30 ...

Страница 87: ... 25 26 27 28 29 30 31 32 33 34 35 TOP PANEL THERMISTOR OUTDOOR HEAT EXCHANGER OUTDOOR FAN MOTOR PROPELLER FAN PROPELLER FAN NUT BASE CABINET HANDLE FAN GUARD 4 WAY VALVE R V COIL DEFROST THERMISTOR COMPRESSOR RUBBER SET COMPRESSOR STOP VALVE LIQUID STOP VALVE GAS SERVICE PANEL COVER PANEL TERMINAL BLOCK TERMINAL BLOCK OUTDOOR FAN CAPACITOR SURGE ABSORBER COMPRESSOR CONTACTOR COMPRESSOR CAPACITOR D...

Страница 88: ... and rinse it Dry the filter in the shade thoroughly When the filter color is still dark even after cleaning replace the filter with a new one Replace the filter at least once a year DEODORIZING FILTER and AIR CLEANING FILTER can be attached on either side Model Part No MAC 1100FT MAC 1700FT MSH 18RV E1 MSH 24RV E1 MSH 30RV E1 Model Part No MAC 1600DF MAC 2200DF MSH 18RV E1 MSH 24RV E1 MSH 30RV E1...

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