SERVICE MANUAL MU-GA20VB- MU-GA20VB- MU-GA25VB- MU-GA25VB- MU-GA35VB- E1 OUTDOOR UNIT. No. OB386. Wireless type Models HFC

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1 SPLIT-TYPE, AIR CONDITIONERS Revision B: MU-A20VB- E2 and MU-A25VB - have been added. Please void OB86 REVISED EDITION-A. E2 OUTDOOR UNIT SERVICE MANUAL HFC utilized R40A No. OB86 REVISED EDITION-B Wireless type Models MU-A20VB- E MU-A20VB- E2 MU-A25VB- E MU-A25VB- E2 MU-A5VB- E Indoor unit service manual MSC-A VB Series (OB85) MSC-CA VB Series (OB9) CONTENTS MU-A20VB MU-A25VB MU-A5VB. TECHNICAL CHANES 2 2. PART NAMES AND FUNCTIONS. SPECIFICATION 4. NOISE CRITERIA CURVES 5 5. OUTLINES AND DIMENSIONS 6 6. WIRIN DIARAM 6 7. REFRIERANT SYSTEM DIARAM 7 8. PERFORMANCE CURVES 8 9. TROUBLESHOOTIN 7 0. DISASSEMBLY INSTRUCTIONS 20. PARTS LIST RoHS PARTS LIST 24 NOTE: This service manual describes technical data of outdoor units. RoHS compliant products have <> mark on the spec name plate. For servicing of RoHS compliant products, refer to the RoHS Parts List.

2 Revision A: -. PARTS LIST has been modified. (The parts No. of BACK PANEL has been changed.) Revision B: MU-A20VB- E2 and MU-A25VB- E2 have been added. TECHNICAL CHANES MU-A07YV-. Indication of capacity has been changed.(btu base kw base) 2. Unit size has been changed. (W780mm x H540mm x D255mm W800mm x H550mm x D285mm). Outdoor fan motor has been changed. (RC6V20-AC RA6V2-AC) 4. Stop valve cover has been added. 5. Outdoor fan capacitor has been changed. 6. Compressor capacitor has been changed. MU-A09YV-. Indication of capacity has been changed.(btu base kw base) 2. Unit size has been changed. (W780mm x H540mm x D255mm W800mm x H550mm x D285mm). Outdoor fan motor has been changed. (RC6V20-AC RA6V2-AC) 4. Stop valve cover has been added. 5. Outdoor fan capacitor has been changed. 6. Compressor capacitor has been changed. 7. Compressor has been changed. (RN099VHSHT RN092VHSHT) MU-A2YV- E E E. Indication of capacity has been changed.(btu base kw base) 2. Unit size has been changed. (W780mm x H540mm x D255mm W800mm x H550mm x D285mm). Outdoor fan motor has been changed. (RC6V-AC RA6V-KA) 4. Stop valve cover has been added. 5. Outdoor fan capacitor has been changed. 6. Compressor capacitor has been changed. 7. Compressor has been changed. (RN5VHSHT 5PS2DAH0) 8. Stop valve (as) has been changed from [2.7 to [ Fuse for compressor protection has been added. MU-A20VB- MU-A25VB- E E MU-A20VB- MU-A25VB- MU-A5VB- MU-A20VB- MU-A25VB-. Compressor has been changed. (RN092VHST KN092VDMHC) 2. Compressor capacitor has been changed.. Capillary tube has been changed. ([.0x[.4x700 [.0x[.4x900) E E E E2 E2 2

3 2 PART NAMES AND FUNCTIONS OUTDOOR UNIT MU-A20VB MU-A25VB MU-A5VB Air inlet back : MU-A20VB ( MU-A25VB ) back and side : MU-A5VB Piping Drain hose Air outlet Drain outlet SPECIFICATION Capacity Electrical data Capacity Dehumidification Outdoor air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compressor motor current Fan motor current kw R/h K /h A A W A(kW) % A A A Coefficient of performance(c.o.p) Model Output W Winding " resistance(at 20:) Model Winding " resistance(at 20:) Dimensions WOHOD mm Weight kg Sound level db Fan speed rpm Fan speed regulator Refrigerant filling kg capacity (R40A) Refrigeration oil (Model) cc Compressor Fan motor Special remarks Outdoor model Outdoor unit power supply NOTE: Test conditions are based on ISO 55. Cooling : Indoor DB27 C WB9 C Outdoor DB5 C WB24 C Indoor-Outdoor piping length : 5m MU-A20VB - E Single phase 20V,50Hz , RN092VHSHT 600 C-R.87 C-S 6.4 RA6V2-AC WHT-BLK 66 BLK-RED o550o (NEO22 ) MU-A20VB - E2 Single phase 20V,50Hz , KN092VDMHC 650 C-R.62 C-S 5.40 RA6V2-AC WHT-BLK 66 BLK-RED o550o (NEO22 )

4 Outdoor model MU-A25VB - E MU-A25VB - E2 MU-A5VB - E Capacity Electrical data Capacity Dehumidification Outdoor air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compressor motor current Fan motor current kw R/h K /h A A W A(kW) % A A A Coefficient of performance(c.o.p) Model Output W Winding " resistance(at 20:) Model Winding " resistance(at 20:) Dimensions WOHOD mm Weight kg Sound level db Fan speed rpm Fan speed regulator Refrigerant filling kg capacity (R40A) Refrigeration oil (Model) cc Compressor Fan motor Special remarks Outdoor unit power supply Single phase 20V,50Hz 2.5., RN092VHSHT 600 C-R.87 C-S 6.4 RA6V2-AC WHT-BLK 66 BLK-RED o550o (NEO22 ) Single phase 20V,50Hz 2.5., KN092VDMHC 650 C-R.62 C-S 5.40 RA6V2-AC WHT-BLK 66 BLK-RED o550o (NEO22 ) Single phase 20V,50Hz.45.7, , PS2DAH0 900 C-R 2.80 C-S 5.4 RA6V-KA WHT-BLK 25 BLK-RED o550o (RB68A) NOTE: Test conditions are based on ISO 55. Cooling : Indoor DB27 C WB9 C Outdoor DB5 C WB24 C Indoor-Outdoor piping length : 5m 4

5 4 NOISE CRITERIA CURVES MU-A20VB MU-A25VB FUNCTION COOL SPL(dB(A)) 45 LINE MU-A5VB FUNCTION COOL SPL(dB(A)) 49 LINE 90 Test conditions, Cooling : DB27: WB9: 90 Test conditions, Cooling :DB5: WB24: OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE THRESHOLD OF HEARIN FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-0 NC-20 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE THRESHOLD OF HEARIN FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-0 NC-20 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz OUTDOOR UNIT m MICROPHONE 5

6 5 OUTLINES AND DIMENSIONS MU-A20VB MU-A25VB MU-A5VB OUTDOOR UNIT 400 Air in Drain hole [42 REQUIRED SPACE 00mm or more Basically open 00mm or more without any obstruction in front and on both sides of the unit. 00mm or more Unit: mm Air in (MU-A5VB) Bolt pitch for installation 04~25 200mm or more 50mm or more holes 0X2 Air out Service panel Open two sides of left, right, or rear side. Handle Liquid refrigerant pipe joint Refrigerant pipe (flared) [ Service port as refrigerant pipe joint Refrigerant pipe (flared) [ Bolt pitch for installation WIRIN DIARAM MU-A20VB MU-A25VB OUTDOOR UNIT TO INDOOR UNIT CONNECTIN 2V TB2 WHT 2 BLK 52C BRN DSAR POWER SUPPLY ~/N 20V 50Hz CIRCUIT BREAKER TB L N PE RN/YLW BRN BLU BLU NO 52C COM WHT C2 C RED WHT 2 WHT RED BLK S RED BLK WHT C MC MF R SYMBOL NAME SYMBOL NAME SYMBOL NAME C COMPRESSOR CAPACITOR MC COMPRESSOR(INNER PROTECTOR) TB2 TERMINAL BLOCK C2 DSAR OUTDOOR FAN CAPACITOR SURE ABSORBER MF TB OUTDOOR FAN MOTOR(INNER FUSE) TERMINAL BLOCK 52C COMPRESSOR CONTACTOR NOTE:. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring). Symbols below indicate. /: Terminal block, : Connector 6

7 MU-A5VB OUTDOOR UNIT TO INDOOR UNIT CONNECTIN 2V TB2 WHT 2 BLK 52C BRN DSAR POWER SUPPLY ~/N 20V 50Hz CIRCUIT BREAKER TB L N PE BRN BLU RN/YLW F BLU BRN NO 52C COM WHT C2 WHT RED WHT C 5C 4 2 RED BLK RED BLK WHT S WHT C MC MF R SYMBOL NAME SYMBOL NAME SYMBOL NAME C C2 DSAR F COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURE ABSORBER FUSE (T20AL250V) MC MF TB TB2 COMPRESSOR OUTDOOR FAN MOTOR (INNER FUSE) TERMINAL BLOCK TERMINAL BLOCK 5C 52C OVERLOAD RELAY COMPRESSOR CONTACTOR NOTE:. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring). Symbols below indicate. /: Terminal block, : Connector 7 REFRIERANT SYSTEM DIARAM MU-A20VB MU-A25VB MU-A5VB OUTDOOR UNIT Refrigerant pipe [9.52 (with heat insulator) Stop valve (with service port) Unit:mm Flared connection Muffler Outdoor heat exchanger Compressor Flared connection Stop valve Strainer #00 Refrigerant pipe [6.5 (with heat insulator) Capillary tube [.0x[.4x700 (MU-A20VB- E, MU-A25VB- E ) [.0x[.4x900 (MU-A20VB- E2, MU-A25VB- E2 ) [.0x[.4x450 (MU-A5VB) Refrigerant flow in cooling 7

8 MAX. REFRIERANT PIPIN LENTH Model MU-A20VB MU-A25VB MU-A5VB Refrigerant piping : m Max. length Max. height A B MAX. HEIHT DIFFERENCE Indoor unit 0 Piping size O.D : mm as Liquid Length of connecting pipe : m Indoor unit Outdoor unit as 0.4 as 0 Liquid 0.5 Liquid 0 Max. Height B Refrigerant Piping Max. length A Outdoor unit ADDITIONAL REFRIERANT CHARE(R40A : g) Model MU-A20VB MU-A25VB MU-A5VB Outdoor unit precharged m 0 Refrigerant piping length (one way) 0m 5m 20m 25m Calculation : Xg=20g/m x(a-7)m 8 PERFORMANCE CURVES MU-A20VB MU-A25VB MU-A5VB The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions, since 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. () UARANTEED VOLTAE 98~264V (2) AIR FLOW Air flow should be set at MAX. () MAIN READINS () Indoor intake air wet-bulb temperature : CWB } (2) Indoor outlet air wet-bulb temperature : CWB Cooling () Outdoor intake air dry-bulb temperature : CDB (4) Total input: W Indoor air wet/dry-bulb temperature difference on the left side of the chart on next page 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. How to measure the indoor air wet-bulb/dry-bulb temperature difference. 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 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.. Check that the air filter is cleaned. 4. Open windows and doors of room. 5. Press the EMERENCY OPERATION switch once to start the EMERENCY COOL MODE. 6. When system stabilizes after more than 5 minutes, measure temperature and take an average temperature minutes later, measure temperature again and check that the temperature does not change. 8

9 INDOOR UNIT OUTDOOR UNIT Wet-and dry-bulb thermometers Wet-and dry-bulb thermometers 8-.CAPACITY AND THE INPUT CURVES MSC-A20VB MU-A20VB MSC-A25VB MU-A25VB MSC-A5VB MU-A5VB 8-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor unit are under the same temperature/humidity condition. Dry-bulb temperature Relative humidity(%) ➁ Air flow should be set at MAX. The unit of pressure has been changed to MPa on the international system of units(si unit system). The conversion factor is : (MPa[auge]) =0.2(kgf/f[auge] ) (kgf/f[auge])(mpa[auge]) MU-A20VB. 4 20V Outdoor low pressure Outdoor unit current (A) 2 MU-A20VB 20V (:) (%) Ambient temperature( C) Ambient humidity(%) (%) 5(:) Ambient temperature( C) Ambient humidity(%)

10 (kgf/f[auge])(mpa[auge]) Outdoor low pressure MU-A25VB V (:) (%) Ambient temperature( C) Ambient humidity(%) Outdoor unit current (A) 4 MU-A25VB 20V (%) 5(:) Ambient temperature( C) Ambient humidity(%) (kgf/f[auge])(mpa[auge]). Outdoor low pressure MU-A5VB 20V Outdoor unit current (A) MU-A5VB 20V (:) (%) Ambient temperature( C) Ambient humidity(%) (:) (%) Ambient temperature( C) Ambient humidity(%) 0

11 PERFORMANCE DATA COOL operation (20V) MSC-A20VB : MU-A20VB CAPACITY : 2.(kW) SHF : 0.74 INPUT : 75(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 0 SHC SHF INPUT 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 Q

12 PERFORMANCE DATA COOL operation (20V) MSC-A20VB : MU-A20VB CAPACITY : 2.(kW) SHF : 0.74 INPUT : 75(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 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 2

13 PERFORMANCE DATA COOL operation (20V) MSC-A25VB : MU-A25VB CAPACITY : 2.5(kW) SHF : 0.70 INPUT : 775(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 0 SHC SHF INPUT 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 Q

14 PERFORMANCE DATA COOL operation (20V) MSC-A25VB : MU-A25VB CAPACITY : 2.5(kW) SHF : 0.70 INPUT : 775(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 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 4

15 PERFORMANCE DATA COOL operation (20V) MSC-A5VB : MU-A5VB CAPACITY :.45(kW) SHF : 0.66 INPUT : 20(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 0 SHC SHF INPUT 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 5 Q

16 PERFORMANCE DATA COOL operation (20V) MSC-A5VB : MU-A5VB CAPACITY :.45(kW) SHF : 0.66 INPUT : 20(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 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 6

17 9 TROUBLESHOOTIN MU-A20VB MU-A25VB MU-A5VB 9-. Cautions on troubleshooting. Before troubleshooting, check the following: ) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the following during servicing. ) Before servicing the air conditioner, be sure to turn off the main 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. ) 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. Lead wiring Housing point 7

18 9-2. Instruction of troubleshooting MU-A20VB MU-A25VB MU-A5VB Start Indoor unit operates. Outdoor unit doesn't operate. Indoor unit operates. Outdoor unit doesn't operate normally. Indoor unit doesn't receive the signal from remote controller. OPERATION INDICATOR lamp on the indoor unit is flashing on and off. Outdoor unit operates in only Test Run operation. W Outdoor unit doesn't stop even if indoor unit stops. Indoor unit operates, when the EMERENCY OPERATION switch is pressed. Indoor unit doesn't operate, when the EMERENCY OPERATION switch is pressed. Check room temperature thermistor. Refer to "Test point diagram and voltage". Check of wiring diagram of outdoor unit (Refer to 6. WIRIN DIARAM.) Refer to "Check of remote controller and receiver P.C. board".. Check indoor / outdoor connecting wire. 2. Refer to "Check of indoor electronic control P.C. board". Flash on and off at 0.5-second intervals Cause: Wrong setting of switch (SW2-2) on the electronic control P.C. board. 2-time flash Cause: Indoor unit Trouble of room temperature/ indoor coil thermistor -time flash Cause: Indoor unit Trouble of indoor fan motor 4-time flash Cause: Indoor unit Trouble of indoor unit control system Refer to indoor unit service manual. Refer to 9-4. A "Check of MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER " (When outdoor unit doesn't operate.). Check room temperature thermistor and indoor coil thermistor. Refer to "Test point diagram and voltage". Refer to "Check of indoor fan motor". Replace the indoor electronic control P.C. board. W "Test run operation" means the operation within 0 minutes after EMERENCY OPERATION switch is pressed. 8

19 9-. Trouble criterion of main parts MU-A20VB MU-A25VB MU-A5VB Part name Compressor (MC) INNER PROTECTOR MU-A20/ A25VB- E 50i 5 C OPEN 90i0 C CLOSE MU-A20/ A25VB- E2 60i 5 C OPEN 90i0 C CLOSE OVERLOAD RELAY MU-A5VB 40i 5 C OPEN 75i 5 C CLOSE C-R C-S Check method and criterion Measure the resistance between the terminals with a tester. (Coil wiring temperature 0 C ~ 40 C) MU-A20/A25VB- E.4~4.8Ω 5.4~6.6Ω Normal MU-A20/A25VB- E2.9~.9Ω 4.76~5.8Ω MU-A5VB 2.46~.0Ω 4.79~5.56Ω Figure MU-A20/A25VB WHT C P AUX. MAIN S R BLK RED MU-A5VB R C AUX. MAIN S R Outdoor fan motor (MF) INNER FUSE 45i 2 C CUT OFF Measure the resistance between the terminals with a tester. (Coil wiring temperature 0 C ~ 40 C) Color of lead wire WHT-BLK BLK-RED Normal MU-A20/A25VB MU-A5VB 2 ~ 96Ω 24 ~ 296Ω 89 ~ 2Ω 270 ~ 2Ω MAIN AUX. FUSE BLK REDWHT 9-4. Troubleshooting flow Indoor unit MSC type When OPERATION INDICATOR lamp flashes 0.5-second intervals. Outdoor unit doesn t operate. P INNER PROTECTOR R OVERLOAD RELAY A Check of MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER Start Turn OFF the power supply (indoor / outdoor unit). Set switch (SW2-2) on the indoor electronic control P.C. board to MU type. w Yes Does the unit operate? No Refer to the "Instruction of troubleshooting." OK w Set the switch (SW2-2) on the indoor electronic control P.C. board to MU type, when the outdoor unit is MU type. If the setting is MUH or MXZ type, the unit does not work. Refer to "MU & MUX TYPE / MUH& MXZ TYPE SWITCH OVER AND AUTO RESTART FUNCTION" on the indoor unit service manual. 9

20 0 DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to () 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. () Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. Sleeve Locking lever Slide the sleeve. 2Pull the terminal while pushing the locking lever. Connector Hold the sleeve, and pull out the terminal slowly. MU-A20VB MU-A25VB MU-A5VB OUTDOOR UNIT OPERATIN PROCEDURE. Removing the cabinet () Remove the screws of the top panel. (2) Remove the screw of the service panel. () Remove the screws of the cabinet. (4) Remove the screws of the front panel and motor support. (5) Remove the service panel, and remove the screw from the insides. (6) Remove the top panel. (7) Remove the cabinet. Photo PHOTOS Screw of the front panel and motor support Photo Screws of the top panel Photo 2 Screws of the cabinet MU-A20/A25VB Screw of the Service panel Screws of the top panel Screws of the cabinet Screw of the cabinet 20

21 OPERATIN PROCEDURE 2. Removing the electrical parts () Remove the service panel and the cabinet.(refer to.) (2) Remove the following parts. Compressor capacitor (C) Outdoor fan capacitor (C2) Terminal block (TB, TB2) Surge absorber (DSAR) Compressor contactor (52C) Photo 4 Compressor capacitor (C) PHOTOS Compressor contactor (52C) Terminal block(tb2) Terminal block (TB) Outdoor fan capacitor (C2) Surge absorber (DSAR). Removing the propeller and the outdoor fan motor () Remove the cabinet. (Refer to.) (2) Remove the propeller nut. () Remove the propeller. NOTE : Loose 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) Remove lead clamps and disconnect the outdoor fan motor connector. (5) Remove screws fixing the fan motor. (6) Remove the outdoor fan motor. Photo 5 Screws of the outdoor fan motor Propeller Hook Outdoor fan motor Outdoor fan motor connector Propeller nut 4. Removing the compressor () Remove the cabinet. (Refer to.) (2) Remove the relay panel. () Remove the soundproof felt. (4) Remove the terminal cover on the compressor. (5) Disconnect lead wires from the glass terminal of the compressor. (6) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (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. (0) Remove the compressor. Photo 6 lass terminal Compressor Screws of the outdoor fan motor Discharge pipe Suction pipe 2 Compressor nuts

22 PARTS LIST (non-rohs compliant) MU-A20VB MU-A25VB MU-A5VB -. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS This figure shows MU-A20/A25VB. 22

23 PARTS LIST (non-rohs compliant) MU-A20VB MU-A25VB MU-A5VB -. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. RA6V2- RA6V- Symbol Q'ty/unit No. Part No. Part name in Wiring Remarks Diagram MU-A20VB- E MU-A25VB- E MU-A5VB- E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E OUTDOOR HEAT EXCHANER OUTDOOR HEAT EXCHANER OUTDOOR FAN MOTOR OUTDOOR FAN MOTOR PROPELLER CABINET CABINET RILLE(OUT) BASE BASE COMPRESSOR RUBBER SET COMPRESSOR RUBBER SET COMPRESSOR COMPRESSOR STOP VALVE(AS) STOP VALVE(LIQUID) BACK PANEL BACK PANEL SERVICE PANEL TERMINAL BLOCK TERMINAL BLOCK OUTDOOR FAN CAPACITOR OUTDOOR FAN CAPACITOR COMPRESSOR CAPACITOR COMPRESSOR CAPACITOR CONDENSER NET CONDENSER NET MOTOR SUPPORT TOP PANEL SEPARATOR FUSE FUSE HOLDER COMPRESSOR CONTACTOR SURE ABSORBER CAPILLARY TUBE CAPILLARY TUBE OVERLOAD RELAY MF MF MC MC TB TB2 C2 C2 C C F 52C DSAR 5C RUBBERS/SET RUBBERS/SET RN092VHSHT 5PS2DAH0 {9.52 {6.5 P 2P.8µF/440VAC 2.0µF/440VAC 20µF/440VAC 25µF/440VAC T20AL250V {.0x{.4x700 {.0x{.4x450 2

24 2 RoHS PARTS LIST (RoHS compliant) MU-A20VB MU-A25VB MU-A5VB 2-. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS This figure shows MU-A20/A25VB. 24

25 RoHS PARTS LIST (RoHS compliant) MU-A20VB MU-A25VB MU-A5VB 2-. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. No RoHS Symbol Q'ty/unit Part No. Part name in Wiring MU- MU- MU- MU- MU- Remarks Diagram A20VB- A20VB- A25VB- A25VB- A5VB- E E2 E E2 E E OUTDOOR HEAT EXCHANER E OUTDOOR HEAT EXCHANER E OUTDOOR FAN MOTOR MF RA6V2- E OUTDOOR FAN MOTOR MF RA6V- E PROPELLER E CABINET E CABINET E RILLE(OUT) E BASE E BASE E2 A BASE E COMPRESSOR RUBBER SET RUBBERS/SET E COMPRESSOR RUBBER SET RUBBERS/SET E COMPRESSOR RUBBER SET RUBBERS/SET E COMPRESSOR MC RN092VHSHT E COMPRESSOR MC 5PS2DAH0 E2 B4 900 COMPRESSOR MC KN092VDMHC E STOP VALVE(AS) {9.52 E STOP VALVE(LIQUID) {6.5 E2 B4 662 STOP VALVE(LIQUID) {6.5 E BACK PANEL E BACK PANEL E SERVICE PANEL E TERMINAL BLOCK TB P E TERMINAL BLOCK TB2 2P E OUTDOOR FAN CAPACITOR C2.8µF/440VAC E OUTDOOR FAN CAPACITOR C2 2.0µF/440VAC E COMPRESSOR CAPACITOR C 20µF/440VAC E COMPRESSOR CAPACITOR C 25µF/440VAC E CONDENSER NET E CONDENSER NET E MOTOR SUPPORT E TOP PANEL E SEPARATOR E FUSE F T20AL250V E FUSE HOLDER E COMPRESSOR CONTACTOR 52C E SURE ABSORBER DSAR E CAPILLARY TUBE {.0x{.4x700 E CAPILLARY TUBE {.0x{.4x450 E2 B4 96 CAPILLARY TUBE {.0x{.4x900 E OVERLOAD RELAY 5C 25

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28 HEAD OFFICE: TOKYO BLD.,2-7-, MARUNOUCHI, CHIYODA-KU, TOKYO00-80, JAPAN C Copyright 2005 MITSUBISHI ELECTRIC ENINEERIN CO.,LTD Distributed in May No.OB86 REVISED EDITION-B 6 Distributed in Mar No.OB86 REVISED EDITION-A 6 Distributed in Jan No.OB86 6 Made in Japan New publication, effective May 2006 Specifications subject to change without notice.