Mitsubishi Electric MU-GE50VB Service Manual Download Page 24

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OPERATING PROCEDURE

PHOTOS

2. Removing the electrical parts <MU-GE50VB>

(1) Remove the service panel and the cabinet. (Refer to 1.)
(2) Remove the following parts.
• Compressor capacitor (C1)
• Outdoor fan capacitor (C2)
• Terminal block (TB1, TB2)
• Surge absorber (DSAR)
• Compressor contactor (52C)

Photo 3 <MU-GE50VB>

3. Removing the deicer P.C. board <MUH-GE50VB>

(1) Remove the service panel and the cabinet. (Refer to 1.)
(2) Disconnect all the connectors and the terminals on the

deicer P.C. board.

(3) Remove the deicer P.C. board.

Photo 4 <MUH-GE50VB>

4. Removing the propeller and the outdoor fan

motor

(1) Remove the cabinet. (Refer to 1.)
(2) Remove the propeller nut.
(3) Remove the propeller.

NOTE: Loosen the propeller in the rotating direction for

removal.

When attaching the propeller, align the mark on the
propeller and the motor shaft cut section.

Set the propeller in position by using the cut on the
shaft and the mark on the propeller.

(4) Disconnect the outdoor fan motor connector.
(5) Remove screws fixing the fan motor.
(6) Remove the outdoor fan motor.

Photo 5 <MU-GE50VB>

Photo 6 <MUH-GE50VB>

Terminal
block (TB1)

Surge absorber
(DSAR)

Screw of the
relay panel

Terminal
block (TB2)

Outdoor fan
capacitor (C2)

Screw of the
relay panel

Compressor
contactor (52C)

Terminal
block (TB1)

Surge absorber
(DSAR)

Screw of the
relay panel

Terminal
block (TB2)

Terminal cover

Screw of the
relay panel

Deicer P.C. board

Propeller

Propeller
nut

Screw of the
outdoor fan motor

Hook

Outdoor fan motor
connector

Screw of the
outdoor fan motor

Hook

Outdoor fan motor

Propeller

Propeller
nut

Compressor
capacitor (C1)

Summary of Contents for MU-GE50VB

Page 1: ... 8 PERFORMANCE CURVES 8 9 ACTUATOR CONTROL 16 10 SERVICE FUNCTIONS 17 11 TROUBLESHOOTING 17 12 DISASSEMBLY INSTRUCTIONS 23 HFC utilized R410A SPLIT TYPE AIR CONDITIONERS Models MU GE50VB E1 MUH GE50VB E1 SERVICE MANUAL OUTDOOR UNIT Indoor unit service manual MS MSH GE VB Series OBH529 No OBH530 NOTE This service manual describes technical data of outdoor units PARTS CATALOG OBB530 ...

Page 2: ...W 850 mm H 605 mm D 290 mm W 800 mm H 550 mm D 285 mm 2 Outdoor fan motor has been changed RA6V50 PA RA6V33 KA MUH GA50VB E1 MUH GE50VB E1 1 Unit size has been changed W 850 mm H 605 mm D 290 mm W 800 mm H 550 mm D 285 mm 2 Outdoor fan motor has been changed RA6V60 MA RA6V33 KB ...

Page 3: ...pressor Model RN196VHSHT RN196VHSHT Output W 1 300 1 300 Compressor motor current A 7 57 7 60 6 90 Fan motor Model RA6V33 KA RA6V33 KB Fan motor current A 0 33 0 33 Dimensions W H D mm 800 550 285 800 550 285 Weight kg 38 40 Special remarks Dehumidification h 2 5 2 5 Air flow h 1 902 1 902 Sound level dB 52 52 Fan speed rpm 855 855 Fan speed regulator 1 1 Refrigerant filling capacity R410A kg 1 35...

Page 4: ...e35 C Wet bulb temperature24 C 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 0002 MICRO BAR BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb temperature35 C Wet bulb temperature24 C Heating Dry bulb temperature 7 C Wet bulb temperature 6 C MU GE50VB COOL FUNCTION 52 SPL dB A LINE MUH GE50VB COOL...

Page 5: ...tion 304 325 40 Liquid refrigerant pipe joint Refrigerant pipe flared ø6 35 Gas refrigerant pipe joint Refrigerant pipe flared ø12 7 4 3 3 5 2 holes 10 21 REQUIRED SPACE Basically open 100mm or more without any obstruction in front and on both sides of the unit 350mm or more 200mm or more 100mm or more 100mm or more Open two sides of left right or rear side Drain hole ø42 Unit mm OUTDOOR UNIT MU G...

Page 6: ...6 WIRING DIAGRAM 6 MU GE50VB MUH GE50VB ...

Page 7: ...nt pipe ø6 35 with heat insulator Stop valve with service port R V coil heating ON cooling OFF Flared connection Flared connection Compressor Stop valve Capillary tube ø3 0 ø1 8 600 2 pcs Refrigerant flow in cooling Refrigerant flow in heating Outdoor heat exchanger Capillary tube 3 0 x 1 6 x 450 Strainer 100 Refrigerant pipe 6 35 with heat insulator Stop valve with service port Compressor Flared ...

Page 8: ...emperature CWB 7 Total input W Indoor air wet dry bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service Cooling Heating MUH GE50VB Length of connecting pipe m Indoor unit Piping size O D mm Liquid 6 35 Gas 12 7 Outdoor unit Gas 0...

Page 9: ...east 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 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 intake Cover the thermometers to prevent direct rays of the sun 3 Check that t...

Page 10: ...18 32 230 V 15 20 50 25 60 30 70 35 C 0 3 0 4 0 5 0 6 0 7 0 8 0 9 3 4 5 6 7 8 9 Outdoor low pressure Ambient temperature C Ambient humidity 18 32 230V 15 20 50 25 60 30 70 35 C 6 7 8 9 10 Ambient temperature C Ambient humidity Outdoor unit current A kgf cm2 Gauge MPa Gauge MUH GE50VB MUH GE50VB 18 32 230V 15 20 50 25 60 30 70 35 C 6 7 8 9 10 18 32 230V 15 20 50 25 60 30 70 35 C 0 3 0 4 0 5 0 6 0 7...

Page 11: ...n indoor Dry bulb temperature 20 0 C Wet bulb temperature 14 5 C Outdoor Dry bulb temperature 7 15 20 C Wet bulb temperature 6 12 14 5 C 21 7 2 230V 0 5 10 15 20 25 3 4 5 6 Outdoor unit current A Ambient temperature C MUH GE50VB ...

Page 12: ... 27 24 6 70 2 35 0 35 1647 6 45 2 26 0 35 1738 6 30 2 21 0 35 1792 6 10 2 14 0 35 1882 27 26 6 90 1 59 0 23 1738 6 70 1 54 0 23 1828 6 60 1 52 0 23 1882 6 40 1 47 0 23 1937 28 18 5 88 4 41 0 75 1448 5 63 4 22 0 75 1520 5 40 4 05 0 75 1593 5 20 3 90 0 75 1665 28 20 6 13 3 86 0 63 1520 5 88 3 70 0 63 1611 5 70 3 59 0 63 1647 5 50 3 47 0 63 1720 28 22 6 38 3 25 0 51 1575 6 15 3 14 0 51 1674 6 00 3 06...

Page 13: ... 59 1846 4 80 2 83 0 59 1937 4 63 2 73 0 59 1991 4 45 2 63 0 59 2045 27 22 5 45 2 56 0 47 1919 5 10 2 40 0 47 2027 4 93 2 31 0 47 2063 4 75 2 23 0 47 2100 27 24 5 75 2 01 0 35 1991 5 40 1 89 0 35 2082 5 25 1 84 0 35 2127 5 10 1 79 0 35 2172 27 26 6 05 1 39 0 23 2063 5 70 1 31 0 23 2154 5 53 1 27 0 23 2199 5 35 1 23 0 23 2244 28 18 4 90 3 68 0 75 1774 4 50 3 38 0 75 1882 4 33 3 24 0 75 1919 4 15 3 ...

Page 14: ...0 59 1495 5 88 3 47 0 59 1584 5 70 3 36 0 59 1620 5 50 3 25 0 59 1691 27 22 6 38 3 00 0 47 1549 6 15 2 89 0 47 1647 6 00 2 82 0 47 1691 5 75 2 70 0 47 1762 27 24 6 70 2 35 0 35 1620 6 45 2 26 0 35 1709 6 30 2 21 0 35 1762 6 10 2 14 0 35 1851 27 26 6 90 1 59 0 23 1709 6 70 1 54 0 23 1798 6 60 1 52 0 23 1851 6 40 1 47 0 23 1905 28 18 5 88 4 41 0 75 1424 5 63 4 22 0 75 1495 5 40 4 05 0 75 1566 5 20 3...

Page 15: ...0 59 2011 27 22 5 45 2 56 0 47 1887 5 10 2 40 0 47 1994 4 93 2 31 0 47 2029 4 75 2 23 0 47 2065 27 24 5 75 2 01 0 35 1958 5 40 1 89 0 35 2047 5 25 1 84 0 35 2092 5 10 1 79 0 35 2136 27 26 6 05 1 39 0 23 2029 5 70 1 31 0 23 2118 5 53 1 27 0 23 2163 5 35 1 23 0 23 2207 28 18 4 90 3 68 0 75 1744 4 50 3 38 0 75 1851 4 33 3 24 0 75 1887 4 15 3 11 0 75 1922 28 20 5 15 3 24 0 63 1816 4 80 3 02 0 63 1905 ...

Page 16: ...336 4 42 1481 5 04 1594 5 72 1674 6 34 1723 6 99 1787 26 2 81 1208 3 48 1417 4 11 1562 4 78 1674 5 46 1755 6 08 1803 6 76 1852 NOTE Q Total capacity kW INPUT Total power input W DB Dry bulb temperature WB Wet bulb temperature ACTUATOR CONTROL 9 Compressor ON OFF COOL DRY 5 seconds HEAT 5 seconds ON OFF ON OFF ON OFF ON OFF ON OFF R V coil Outdoor fan R V coil control Heating ON Cooling OFF Dry OFF...

Page 17: ...ower 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 wires MU GE50VB MUH GE50VB ...

Page 18: ...terminal block TB1 Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch 3 minute time delay works Test run operation operates for 30 minutes Outdoor fan motor doesn t operate No Rectify the indoor and outdoor connecting wire Rectify the connecting wire Check the compressor and compressor capacitor and rectify the connecting wire Start Yes Is there 230 V AC between 4 on ...

Page 19: ...ected or is not short circuit After 3 minutes does the unit operate in HEAT mode OK No Is there 230 V AC between CN721 on the deicer P C board Replace the deicer P C board Yes Yes Yes No Replace the R V coil Turn ON the power supply and operate the indoor unit in COOL mode by pressing the EMERGENCY OPERATION switch Unit operates HEAT mode even if it is set to COOL mode First measure the resistance...

Page 20: ...etween 0 20 V Turn ON the power supply indoor outdoor unit Press EMERGENCY OPERATION switch once Is this mis wiring poor contact or wire disconnection Correct them Replace the indoor electronic control P C board Yes Yes After 3 minutes mis wiring is indicated 0 5 second ON 0 5 second OFF on OPERATION INDICATOR lamp on indoor unit Short circuit of JPG and JPS on the indoor electronic control P C bo...

Page 21: ... the power supply and press the EMERGENCY OPERATION switch Is the resistance of thermistor normal No Yes Does the unit operate 10 minutes or more Replace the deicer P C board OK Defective contact of the connector is considered Turn OFF the power supply Start When OPERATION INDICATOR lamp flashes 6 time Thermistors in the outdoor unit are abnormal ...

Page 22: ... F61 Fuse T2AL250V CN661 Defrost thermistor RT61 12 V DC J204 J101 R601 5 10 V DC 5 V DC J205 J101 Power supply input 230 V AC NR61 Varistor Jumper wire for change in defrost setting JRF JRG Refer to 10 2 Defrost interval time short pin JPDS JPSG Refer to 10 1 11 4 TEST POINT DIAGRAM AND VOLTAGE ...

Page 23: ...erminal with locking mechanism Detaching points Connector Sleeve Locking lever MU GE50VB MUH GE50VB NOTE Turn OFF power supply before disassembling OPERATING PROCEDURE PHOTOS 1 Removing the cabinet 1 Remove the screw fixing the service panel 2 Pull down the service panel and remove it 3 Disconnect the power supply and indoor outdoor con necting wire 4 Remove the screws fixing the top panel 5 Remov...

Page 24: ...eller in the rotating direction for removal When attaching the propeller align the mark on the propeller and the motor shaft cut section Set the propeller in position by using the cut on the shaft and the mark on the propeller 4 Disconnect the outdoor fan motor connector 5 Remove screws fixing the fan motor 6 Remove the outdoor fan motor Photo 5 MU GE50VB Photo 6 MUH GE50VB Terminal block TB1 Surg...

Page 25: ...essor 6 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0 MPa 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 Photo 7 MU GE50VB Photo 8 MUH GE50VB Compressor Suction pipe Discharge pipe Glass terminal 4 Way valve Discharge...

Page 26: ...26 ...

Page 27: ...27 ...

Page 28: ...ECTRIC ENGINEERING CO LTD Distributed in Dec 2008 No OBH530 5 Made in Japan New publication effective Dec 2008 Specifications subject to change without notice HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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