Mitsubishi Electric MUCF-13NV-E3 Service Manual Download

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SERVICE MANUAL

FLOOR AND CEILING TYPE AIR CONDITIONERS

CONTENTS

1. TECHNICAL CHANGES ····································2

2. PART NAMES AND FUNCTIONS······················2

3. SPECIFICATION·················································4

4. NOISE CRITERIA CURVES ······························ 5

5. OUTLINES AND DIMENSIONS ·························6

6. WIRING DIAGRAM ············································7

7. REFRIGERANT SYSTEM DIAGRAM ················8

8. PERFORMANCE CURVES ································9

9. MICROPROCESSOR CONTROL ····················15

10. SERVICE FUNCTIONS·····································21

11. TROUBLESHOOTING ······································22

12. DISASSEMBLY INSTRUCTIONS·····················28

13. PARTS LIST······················································32

14. OPTIONAL PARTS···········································35

Wireless type
Model

MCF-13NV-

(WH)

·MUCF-13NV-

(When installed on the ceiling)

(When installed on the floor)

No. OB239

MCF-13NV -

Summary of Contents for MUCF-13NV-E3

Page 1: ...LINES AND DIMENSIONS 6 6 WIRING DIAGRAM 7 7 REFRIGERANT SYSTEM DIAGRAM 8 8 PERFORMANCE CURVES 9 9 MICROPROCESSOR CONTROL 15 10 SERVICE FUNCTIONS 21 11 TROUBLESHOOTING 22 12 DISASSEMBLY INSTRUCTIONS 28 13 PARTS LIST 32 14 OPTIONAL PARTS 35 Wireless type Model MCF 13NV WH MUCF 13NV E3 E3 When installed on the ceiling When installed on the floor No OB239 MCF 13NV E3 ...

Page 2: ...er Air inlet Operation section Air cleaning filter whilte bellows type option Front panel Receiving section Operation indicator lamp Horizontal vane Vertical vanes Emergency operation switch When installed on the ceiling 2 TECHNICAL CHANGES 1 MCF 13NV MCF 13NV 1 Indoor unit model name has changed MUCF 13NV MUCF 13NV 1 Outdoor unit model has changed E3 E2 E3 E2 MCF 13NV E3 ...

Page 3: ...3 RESET RESET CLOCK CLOCK MCF 13NV E3 OUTDOOR UNIT MUCF 13NV E3 Air inlet Piping Drain hose Air outlet Drain outlet back and side REMOTE CONTROLLER ...

Page 4: ...nit RT11 at 25 RT12 at 25 Sound level Hi Fan speed Hi Fan speed regulator Outdoor unit Outdoor unit Air direction Refrigerant filling capacity R 22 Refrigerating machine oil Model Thermistor Weight Special remarks Model Output Winding resistance at 20 Model Winding resistance at 20 Model Winding resistance at 20 MCF 13NV E3 Cooling Single phase 220 240V 50Hz 3 7 1 6 678 10 6 3 6 3 1 310 1 380 95 9...

Page 5: ...ing DB 27 WB 19 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE Hi 220 240V NOTCH 43 44 SPL dB A LINE MCF 13NV E3 MUCF 13NV 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 35 WB 24 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOI...

Page 6: ... MCF 13NV E3 MUCF 13NV E3 320 25 4 3 3 5 155 90 104 74 260 10 780 500 122 40 540 320 285 255 Service panel Gas refrigerant pipe joint Refrigerant 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 Unit mm OUTDOOR UNIT If clearance behind the outdoor units only 40B or 50B side A must be fully open 10cm or more 10cm or m...

Page 7: ...OR SOLID STATE RELAY TERMINAL BLOCK CONTACTOR PE MODEL WIRING DIAGRAM MCF 13NV E3 1Slide the sleeve 2Pull the wire while pushing the locking lever NOTE 1 Use copper conductors only For field wiring 2 W shows the terminals with a lock mechanism so they cannot be removed when you pull the lead wire Be sure to pull the lead wire by pushing the locking lever projected part of the terminal with a finge...

Page 8: ... UNIT OUTDOOR UNIT Unit mm MCF 13NV E3 MUCF 13NV E3 A Refrigerant piping Max length 15m 49ft Max Height difference 5m 16ft Height difference should be within 5m regardless of which unit indoor or outdoor position is high MAX REFRIGERANT PIPING LENGTH MAX HEIGHT DIFFERENCE ADDITIONAL REFRIGERANT CHARGE R 22 g Length m ft A 15 49 Gas 12 7 1 2 Liquid 6 35 1 4 Piping size O D mm in Model MCF 13NV E3 O...

Page 9: ... outlet air wet bulb temperature for your reference at service How to measure the indoor air wet 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 indoor air outlet The thermometers must be attached to the position where air speed is high 2 Attach at least...

Page 10: ...ld be set at MAX 20 25 30 0 3 0 4 0 5 0 6 0 7 0 8 20 25 30 3 4 5 6 7 8 Ambient temperature Ambient humidity 18 50 60 70 32 Ambient temperature Ambient humidity 18 50 60 70 32 Outdoor unit current A Outdoor low pressure 7 6 5 4 3 8 kgf F G MPa G 220 240V 220 240V 3 The unit of pressure has been changed to MPa on the international system of units SI unit system The conversion factor is 1 MPa G 10 2 ...

Page 11: ...0 40 1362 27 26 5 11 1 43 0 28 1258 4 96 1 39 0 28 1323 4 88 1 37 0 28 1362 4 74 1 33 0 28 1402 28 18 4 35 3 48 0 80 1048 4 16 3 33 0 80 1100 4 00 3 20 0 80 1153 3 85 3 08 0 80 1205 28 20 4 53 3 08 0 68 1100 4 35 2 96 0 68 1166 4 22 2 87 0 68 1192 4 07 2 77 0 68 1245 28 22 4 72 2 64 0 56 1140 4 55 2 55 0 56 1212 4 44 2 49 0 56 1245 4 26 2 38 0 56 1297 28 24 4 96 2 18 0 44 1192 4 77 2 10 0 44 1258 ...

Page 12: ... 0 52 1389 3 77 1 96 0 52 1467 3 64 1 90 0 52 1493 27 24 4 26 1 70 0 40 1441 4 00 1 60 0 40 1507 3 89 1 55 0 40 1539 27 26 4 48 1 25 0 28 1493 4 22 1 18 0 28 1559 4 09 1 14 0 28 1592 28 18 3 63 2 90 0 80 1284 3 33 2 66 0 80 1362 3 20 2 56 0 80 1389 28 20 3 81 2 59 0 68 1336 3 55 2 42 0 68 1402 3 42 2 33 0 68 1441 28 22 4 03 2 26 0 56 1389 3 77 2 11 0 56 1467 3 64 2 04 0 56 1493 28 24 4 26 1 87 0 4...

Page 13: ...0 52 1311 4 26 2 21 0 52 1366 27 24 4 96 1 98 0 40 1256 4 77 1 91 0 40 1325 4 66 1 86 0 40 1366 4 51 1 81 0 40 1435 27 26 5 11 1 43 0 28 1325 4 96 1 39 0 28 1394 4 88 1 37 0 28 1435 4 74 1 33 0 28 1477 28 18 4 35 3 48 0 80 1104 4 16 3 33 0 80 1159 4 00 3 20 0 80 1214 3 85 3 08 0 80 1270 28 20 4 53 3 08 0 68 1159 4 35 2 96 0 68 1228 4 22 2 87 0 68 1256 4 07 2 77 0 68 1311 28 22 4 72 2 64 0 56 1201 ...

Page 14: ... 0 52 1463 3 77 1 96 0 52 1546 3 64 1 90 0 52 1573 27 24 4 26 1 70 0 40 1518 4 00 1 60 0 40 1587 3 89 1 55 0 40 1622 27 26 4 48 1 25 0 28 1573 4 22 1 18 0 28 1642 4 09 1 14 0 28 1677 28 18 3 63 2 90 0 80 1352 3 33 2 66 0 80 1435 3 20 2 56 0 80 1463 28 20 3 81 2 59 0 68 1408 3 55 2 42 0 68 1477 3 42 2 33 0 68 1518 28 22 4 03 2 26 0 56 1463 3 77 2 11 0 56 1546 3 64 2 04 0 56 1573 28 24 4 26 1 87 0 4...

Page 15: ...stopped with the OPERATE STOP ON OFF button on the remote controller and restarted within 2 hours in I FEEL CONTROL mode the system operates in previous mode automatically regardless of the room temperature Example Previous operation COOL mode of I FEEL CONTROL or COOL mode When the system is restarted after 2 hours and more the operation mode is determined by the room temperature at start up of t...

Page 16: ... mode of I FEEL CONTROL 1 Indoor fan speed control Indoor fan operates at the set speed by FAN SPEED CONTROL button In Auto the fan speed is as follows Initial temperature difference Fan speed Room temperature minus set temperature 2 degrees or more Hi Room temperature minus set temperature Between 1 and 2 degrees Me Room temperature minus set temperature less than 1 degree Lo 2 Coil frost prevent...

Page 17: ... 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 5minutes because protection Coil frost prevention has the priority However when coil frost prevention works while the compressor is not operating it s speed becomes Lo 9 2 COOL OPERATION 1 Press OPERATE STOP ON OFF button OPER...

Page 18: ... finished d When the test run starts e When the power supply turns ON 4 VANE AUTO mode In VANE AUTO mode the microprocessor automatically determines the vane angle and operation to make the optimum room temperature distribution 6 Dew prevention During COOL or DRY operation at Position 4 or 5 when the compressor cumulative operation time exceeds 1 hour the angle of horizontal vane automatically cha...

Page 19: ... to place 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 TIME...

Page 20: ...ed are memorized by the the auto restart P C board The AUTO RESTART function sets to work the moment the power has restored after power failure Then the unit will restart automatically However if the unit is operated in I FEEL CONTROL mode before power failure the operation is not memorized In I FEEL CONTROL mode the operation is decided by the initial room temperature NOTE The operation settings ...

Page 21: ...int J1 and J2 Jumper wires are mounted to each J1 and J2 Cut J1 and J2 according to the number of indoor unit as shown in Table 1 After modification push the RESET button NOTE At power supply failure or installation indoor unit deletes the memory about remote controller When the power supply is turned on and indoor unit receives the first signals from the remote controller the remote controller nu...

Page 22: ...eck if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the abnormality indication is flashing on and off before starting service work 2 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 troubleshoo...

Page 23: ...r Refer to Check of outdoor unit on page 26 Indoor unit doesn t receive the signal from remote controller Refer to Check of receiver P C board on page 25 OPERATION INDICATOR lamp on the indoor unit is flashing on and off Indoor unit doesn t receive the signal from remote controller Also OPERATION INDICATOR lamp doesn t flash when the EMERGENCY OPERATION switch is pressed Refer to Check of indoor e...

Page 24: ...Coil wiring temperature 10 C 40 C Figure C S R BLK RED WHT P BLK RED ORN YLWBLU BRN WHT GRN YLW P Normal 8kΩ 20kΩ Abnormal Opened or short circuited Normal 1 86 2 28Ω 3 5 4 29Ω C R C S Normal Abnormal Opened or short circuited WHT BLK Normal Abnormal Opened or short circuited WHT BLK BLK RED 155 191Ω 363 445Ω 195 212Ω BLK YLW 44 1 47 8Ω YLW BLU 31 4 34 1Ω BLU BRN 42 6 46 1Ω BRN RED 22 3 24 2Ω Abno...

Page 25: ...er Is LCD display on the remote controller visible Replace the batteries see page 22 Remove the batteries and then set them back Check if the unit operates with the remote controller Does the unit operate with remote controller Turn on a radio to AM and press switch on remote controller Is noise heard from radio Replace the remote controller Are there any fluorescent lights of inverter or rapid st...

Page 26: ...F11 blown Check of outdoor unit D Start Press the EMERGENCY OPERATION switch 3 minute time delay works Test run operation operates for 30 minutes Replace the indoor electronic control P C board Check the outdoor unit fan motor and the compressor Check the continuity of indoor and outdoor unit connection No No Yes Yes Check voltage to the terminal block of indoor unit Is there 220 240V AC to termin...

Page 27: ... 20 30 40 50 60 Temperature C Resistance K TEST POINT DIAGRAM AND VOLTAGE MCF 13NV E3 Indoor electronic control P C board Room temperature thermistor RT11 Fan motor power supply 7 5 6 4 3 2 1 8 Lo Hi Fuse 250V AC 3 15A Power supply input 220 240V AC 12V DC 5V DC Time short point Indoor coil thermistor RT12 Fan motor voltage 220 240V AC JHA Release of AUTO RESTART FUNCTION Refer to page 21 CN104 ...

Page 28: ...d and remove the catch 7 Take out the sirocco fan and the indoor fan motor Photo 1 Photo 2 Photo 3 Photo 4 Screws of the grill Electronic box Fan casing upper Indoor fan motor Screws of the motor band Fan casing upper Motor band Terminal box 12 1 MCF 13NV INDOOR UNIT E3 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector is a terminal with lock mechan...

Page 29: ... 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 installations 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 of the front panel Installations and screws screws ...

Page 30: ...des 6 Remove the top panel 7 Remove the cabinet Photo 1 Photo 3 Screws of the top panel Service panel Screws of the service panel Screws of the top panel Screws of the cabinet Screws of the cabinet Photo 2 Screws of the front panel and motor support 2 Removing the electrical parts 1 Remove the service panel and the cabinet Refer to 1 2 Remove the following parts Compressor capacitor C1 Outdoor fan...

Page 31: ...ressor 1 Remove the cabinet 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 compressor 6 Release 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 co...

Page 32: ... E02 227 303 FRONT PANEL WH GRILLE WH VANE WH AIR FILTER BACK PANEL IN NOZZLE WH FAN CASING U FAN CASING L INDOOR HEAT EXCHANGER DRAIN PAN UNION GAS UNION LIQUID INSTALLATION METAL L INSTALLATION METAL R GRILLE CATCH WH VANE MOTOR 12 7 6 35 3PCS SET 1 1 1 2 1 1 2 2 1 1 1 1 1 1 3 1 Symbol in Wiring Diagram MCF 13NV E3 WH VM 16 2 3 13 18 17 17 18 E02 227 426 E02 141 083 REMOTE CONTROLLER REMOTE CONT...

Page 33: ...27 468 E02 324 307 E02 336 385 E02 324 452 INDOOR FAN MOTOR SIROCCO FAN FAN MOTOR RUBBER MOUNT TERMINAL BLOCK TERMINAL BLOCK SWITCH ROOM TEMPERATURE P C BOARD ELECTRONIC CONTROL P C BOARD FUSE RECEIVER P C BOARD INDOOR COIL THERMISTOR VARISTOR AUTO RESTART P C BOARD RA4V19 2PCS SET FigureA FigureB 3 15A 1 2 2 1 1 1 1 1 1 1 1 1 MF TB TB F11 RT12 NR11 MCF 13NV E3 WH 8 9 6 5 1 3 4 2 11 13 3 INDOOR UN...

Page 34: ...UPPORT COMPRESSOR BASE OUTDOOR FAN MOTOR PROPELLER FAN COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR TERMINAL BLOCK OUT CAPILLARY TUBE COMPRESSOR RUBBER SET STOP VALVE LIQUID STOP VALVE GAS BACK PANEL OUT TOP PANEL FUSE RH 231VHAT RA6V33 30 440VAC 1 5 440VAC 3 0X 1 6X300 3RUBBERS SET 6 35 12 7 250V2A 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 MC MF C1 C2 TB F Symbol in Wiring Diagram MUCF 13NV E3 Part num...

Page 35: ...ed it may reduce the air conditioner 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 Remove the air filter and the deodorizing filter together Separate the deodorizing filter gray sponge type from the air filter Remove the air filter and the air clea...

Page 36: ...NOUCHI TOKYO100 8310 TELEX J24532 CABLE MELCO TOKYO C CCopyright 1999 MITSUBISHI ELECTRIC ENGINEERING CO LTD Issued in Jun 1999 No OB239 268 Printed in Japan New publication effective Jun 1999 Specifications subject to change without notice ...

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