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Mitsubishi Electric MS-30SV-A1, Service Manual

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Mitsubishi Electric MS-30SV-A1 Service Manual Download Page 37

37

TEST POINT DIAGRAM AND VOLTAGE
MS-30SV  -
Indoor electronic control P.C. board

A1

Fan motor power supply

Fuse (F11) 
250V AC 3.15A

}

Power supply input

240V AC

+

}

5V DC

Indoor coil 
thermistor(RT12(main))

Timer short mode point
(JPS, JPG)
(Refer to page 24.)

Emergency operation 
switch

+

}

12V DC

Indoor coil thermistor(RT12(main), RT13(sub))

Room temperature thermistor (RT11)

Room temperature
thermistor(RT11)

How to set “Auto restart function”
Cut the Resistor JR07. (Refer to page 25.)

Indoor coil 
thermistor(RT13(sub))

OB255--2qxp  7/20/00 10:12 AM  Page 37

Summary of Contents for MS-30SV-A1

Page 1: ...D DIMENSIONS 6 5 WIRING DIAGRAM 8 6 REFRIGERANT SYSTEM DIAGRAM 10 7 PERFORMANCE CURVES 11 8 MICROPROCESSOR CONTROL 15 9 SERVICE FUNCTIONS 24 10 TROUBLESHOOTING 26 11 DISASSEMBLY INSTRUCTIONS 40 12 PARTS LIST 44 13 OPTIONAL PARTS BACK COVER Wireless type Model MS 30SV WH MU 30SV A1 A1 No OB255 MS 30SV A1 OB255 1qxp 7 20 00 10 09 AM Page 1 ...

Page 2: ...2 Grille Operation Indicator PART NAMES AND FUNCTIONS 1 INDOOR UNIT MS 30SV A1 OUTDOOR UNIT MU 30SV A1 When the grille is opened OB255 1qxp 7 20 00 10 09 AM Page 2 ...

Page 3: ... 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 OB255 1qxp 7 20 00 10 09 AM Page 3 ...

Page 4: ... Output Winding resistance at20 Model Winding resistance at20 Dimensions WOHOD Weight Sound level Hi Fan speed Hi Fan speed regulator Refrigerant filling capacity R 22 Refrigerating oil Model Thermistor RT62 at25 Thermistor RT63 at0 kW K h L h A A W A kW A A mm kg dB rpm k k k K h A A W mm kg dB rpm kg L k k MS 30SV A1 Single phase 240V 50Hz 25 93 0 35 RC4V40 AA WHT BLK 138 2 BLK RED 159 0 1100O32...

Page 5: ...R CONTINUOUS NOISE COOLING FUNCTION 45 SPL dB A LINE Hi NOTCH 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 temperature 35 Wet bulb temperature 24 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE COOLING FUNCTION 55 SPL dB A LI...

Page 6: ...1 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 16 0 43m Insulation 50 O D 32 I D Installation plate Wall hole 75 Wireless remote controller Installation plate Indoor unit MS 30SV A1 INDOOR UNIT Unit mm OB255 1qxp 7 20 00 10 09 AM Page 6 ...

Page 7: ... 39 5 27 5 Terminal block for indoor and outdoor unit connection Terminal block for power line 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 Drain hole 2 12o23...

Page 8: ...R11 RT11 RT12 RT13 SYMBOL C11 F11 HIC1 MF MV1 NAME NAME NAME INDOOR FAN CAPACITOR FUSE 3 15A DC DC CONVERTER INDOOR FAN MOTOR INNER PROTECTOR VANE MOTOR HORIZONTAL VANE MOTOR VERTICAL VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR MAIN INDOOR COIL THERMISTOR SUB SOLID STATE RELAY TERMINAL BLOCK NOTE 1 About the outdoor side electric wiring refer to the outdoor unit electric wiring dia...

Page 9: ...RT63 SR61 SR62 TB1 SYMBOL CT C1 C2 DSAR F61 LEV MC NAME NAME NAME CURRENT TRANS COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 3 15A EXPANSION VALVE COIL COMPRESSOR INNER PROTECTOR OUTDOOR FAN MOTOR INNER PROTECTOR VARISTOR DISCHARGE TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR SOLID STATE RELAY SOLID STATE RELAY TERMINAL BLOCK TERMINAL BLOCK TRANS CONTACTOR SOFT START REL...

Page 10: ...Capillary tube 4 0 2 4 100 MS 30SV A1 INDOOR UNIT OUTDOOR UNIT Unit mm MU 30SV A1 MAX REFRIGERANT PIPING LENGTH Model Refrigerant piping Max length A MS 30SV 30 15 88 9 52 Gas 0 43 Liquid 0 5 Length of connecting pipe m Piping size O D mm Indoor unit Outdoor unit Liquid Gas A1 Gas 0 Liquid 0 MAX HEIGHT DIFFERENCE Refrigerant Piping Max length A w Height difference should be within 15m regardless o...

Page 11: ...ry 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 2 sets of wet and dry bulb thermometers to the outdoor air intake Cover the thermometers to p...

Page 12: ... 35 10 11 12 13 14 15 16 17 Outdoor low pressure Outdoor unit current A MPa Gauge OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation 1 1 Both indoor and outdoor unit are under the same temperature humidity condition 2 2 Air flow should be set at MAX Dry bulb temperature Relative humidity 20 50 25 60 30 70 MU 30SV A1 OB255 1qxp 7 20 00 10 09 AM Page 12 ...

Page 13: ...3 0 21 3418 11 26 2 36 0 21 3596 11 09 2 33 0 21 3702 10 75 2 26 0 21 3809 28 18 9 87 7 21 0 73 2848 9 45 6 90 0 73 2990 9 07 6 62 0 73 3133 8 74 6 38 0 73 3275 28 20 10 29 6 28 0 61 2990 9 87 6 02 0 61 3168 9 58 5 84 0 61 3240 9 24 5 64 0 61 3382 28 22 10 71 5 25 0 49 3097 10 33 5 06 0 49 3293 10 08 4 94 0 49 3382 9 66 4 73 0 49 3524 28 24 11 26 4 16 0 37 3240 10 84 4 01 0 37 3418 10 58 3 92 0 37...

Page 14: ...8 2 01 0 21 4236 9 28 1 95 0 21 4325 8 99 1 89 0 21 4414 28 18 8 23 6 01 0 73 3489 7 56 5 52 0 73 3702 7 27 5 30 0 73 3774 6 97 5 09 0 73 3845 28 20 8 65 5 28 0 61 3631 8 06 4 92 0 61 3809 7 77 4 74 0 61 3916 7 48 4 56 0 61 4023 28 22 9 16 4 49 0 49 3774 8 57 4 20 0 49 3987 8 27 4 05 0 49 4058 7 98 3 91 0 49 4130 28 24 9 66 3 57 0 37 3916 9 07 3 36 0 37 4094 8 82 3 26 0 37 4183 8 57 3 17 0 37 4272...

Page 15: ...ion Indicator lamp The operation indicator at the right side of the indoor unit indi cates the operation state 8 MICROPROCESSOR CONTROL Once the operation mode are set the same operation mode can be repeated by simply turning the OPERATE STOP ON OFF button ON Indoor unit receives the signal with a beep tone When the system turns off 3 minute time delay will operate to protect system from overload ...

Page 16: ... The indoor fan operates at the set speed and the compressor stops for 5 minutes After that if RT12 or RT13 still reads below 1 C this mode prolonged until the RT12 and RT13 reads over 1 C TOO COOL TOO WARM COOL mode of I FEEL CONTROL 1 Indoor fan speed control Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat s OFF ON In AUTO the fan speed ...

Page 17: ...in 3 min ON OFF OFF OFF OFF OFF ON ON ON ON ON ON OFF OFF OFF 4 Discharge temperature protection 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 3 minutes after the compressor i...

Page 18: ...prevention is as same as COOL mode of I FEEL CONTROL 8 3 DRY OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select DRY mode with the OPERATION SELECT button 3 The microprocessor reads the room temper ature and determines the set temperature Set temperature is as shown on the right chart Thermostat SET TEMP does not work The othe...

Page 19: ...he power supply turns ON 4 VANE AUTO mode In VANE AUTO mode the microprocessor automatically determines the horizontal vane angle and operation to make the optimum room temperature distribution 1 1 In COOL and DRY operation 2 2 In FAN operation Vane angle is fixed to Angle 1 Vane angle is fixed to Angle 4 6 Dew prevention During COOL or DRY operation at vane Angle 4 or 5 when the compressor cumula...

Page 20: ...stor Tp w 1 at starting of this operation next downward blow time is decided Then when the downward blow has been finished next upward blow time is decided For initial 10 minutes the swing operation is performed in table G H for quick cooling but G Tp w 1 is 24 or less Also after 10 minutes when the difference of set temperature and room temperature is more than 2 the swing opera tion is performed...

Page 21: ...he 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 8 7 TIMER OPERATION 1 How to set the timer 1 Press OPERATE STOP ...

Page 22: ...he LEV to adjust to set opening after closing the LEV much once Stop of indoor unit Opening in stop 150 pulse LEV is set that opening becomes 500 pulse after 3 minutes passed Remote controller ON LEV positioning LEV opening is closed completely once Power ON Breaker ON LEV is positioned However afterwards LEV is not positioned at the first remote controller ON Approximate for 2 minutes since compr...

Page 23: ...ence RT is 3 or more the target temperature is changed again The LEV opening is controlled based on the changed target discharge temperature and the temper ature difference RT Ta more than Tb 10 Tb 5 to Tb 10 Tb 2 to Tb 5 Tb 2 to Tb 2 Tb 5 to Tb 2 Tb 10 to Tb 5 less than Tb 10 less than 2 20 10 2 0 2 5 10 NOTE Discharge temperature Ta Target discharge temperature Tb 3 or more 60 20 2 0 2 5 10 RT 2...

Page 24: ...lowing figures Sec A WITH SOFT START RELAY WITHOUT SOFT START RELAY 9 SERVICE FUNCTIONS 9 2 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 9 1 T...

Page 25: ...t the setting How to set AUTO RESTART FUNCTION 1 Turn off the main power for the unit 2 Pull out the indoor electronic control P C board and the display P C board Refer to page 40 3 Cut the RESISTOR JR07 on the indoor electronic control P C board Refer to page 37 Operation 1 If the main power 240V AC has been cut the operation settings remain 2 After the power is restored the unit restarts automat...

Page 26: ...anel 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 Housing point Lead wiring Insert the minus pole of the batteries first Check if the polarity of t...

Page 27: ...r unit Trouble of indoor fan motor 5 time flash Cause Outdoor unit Outdoor power system abnormality 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer to F How to check mis wiring When outdoor unit doesn t work on page 34 Check room temperature thermistor and indoor coil thermis tor Refer to Test point diagr...

Page 28: ... does not operate Room tempera ture thermistor 2 time flash 2 5 second OFF Detect Indoor coil room temperature thermistor short or open circuit every 8 seconds during operation Refer to the characteristics of indoor coil thermistor auxiliary indoor coil thermistor and room temperature thermistor on page 37 3 time flash 2 5 second OFF Indoor fan repeats 12 seconds ON and 3 minutes OFF When the indo...

Page 29: ...stor with your hands to warm it up Part temperature 20 C 40 C Normal 100 k 300 k Abnormal Open or short circuit Normal 5 k 60 k Abnormal Open or short circuit Motor part Sensor part Measure the resistance between the terminals with a tester Coil wiring temperature 10 C 30 C 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 App...

Page 30: ...lter on receiving part Switch on the remote controller Is LCD display on the remote con troller visible Yes Does the unit operate with the remote controller Yes OK No not clear Yes No No No 5V or 0V DC No Repair the indoor fan motor Disconnect lead wires from connector CN211 on the indoor electronic control P C board Measure resistance between lead wires No 1 and No 4 and then No 1 and No 3 Are le...

Page 31: ...lace 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 ...

Page 32: ...V AC between 2 on the soft start relay and N on the outdoor terminal block Yes Is there 240V AC CN730 on the deicer P C board Replace the deicer P C board Replace the deicer P C board No Yes No Is there 240V AC between 1 on the soft start relay and N on the outdoor terminal block No No Check the noise filter P C board Turn OFF the power supply and remove the noise filter P C board Replace the nois...

Page 33: ...ply again 3 Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch 4 Operate the unit for 1 minute or more and stop it by pressing the EMERGENCY OPERATION switch again Ok No After 30 seconds did outdoor fan stop Replace the deicer P C board Yes Ok No Yes Replace the soft start relay No Make the connection of wiring correct Is there 240V AC between 2 on the soft start rela...

Page 34: ... the indoor electronic control P C board Is there 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 Refer to page 38 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 38 Replace the deicer P C board Yes Yes Yes A...

Page 35: ...ristics of LEV coil No Properly fix LEV coil to the body Replace the DEICER P C board NOTE After check LEV do the undermentioned operation 1 Turn OFF the breaker of the unit and turn ON again 2 Press the RESET button on the remote controller 1 During pressing OPERATION SELECT button on remote controller press RESET button 2 First release RESET button Confirm all displays of remote controller 3 The...

Page 36: ... of each thermistor Check of compressor H Ok Replace the compressor Is resistance of compressor 1 several at 10 40 of winding temperature Replace the compressor Check the refrigerant circuit Does compressor operate continuously No Check the power supply and connection of wiring Check the deicer P C board Refer to page 38 Check the power supply voltage No Turn ON the power supply Yes Replace the de...

Page 37: ...Indoor coil thermistor RT12 main Timer short mode point JPS JPG Refer to page 24 Emergency operation switch 12V DC Indoor coil thermistor RT12 main RT13 sub Room temperature thermistor RT11 Room temperature thermistor RT11 How to set Auto restart function Cut the Resistor JR07 Refer to page 25 Indoor coil thermistor RT13 sub OB255 2qxp 7 20 00 10 12 AM Page 37 ...

Page 38: ...thermistor RT63 20 10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature Resistance k CN662 1 2 Discharge tem perature ther mistor RT62 Refer to page 36 CN662 3 4 Ambient tempera ture thermistor RT63 Refer to page 36 LEV connector CN724 Fan motor connector CN711 Varistor NR61 CN7301 3 240V AC Refer to page 34 R601 10V DC Refer to page 34 Refer to page 34 J101 J401 0V DC J202 R614 Refer to ...

Page 39: ...9 MU 30SV Noise filter P C board A1 Power supply output 240V AC Power supply input 240V AC LD81 LD80 LD83 LD82 MU 30SV Soft start relay A1 A1 A2 Terminal 1 Terminal 2 OB255 2qxp 7 20 00 10 13 AM Page 39 ...

Page 40: ...he front panel Remove the screws 2 Pull the panel down to your side slightly and unhook the catches at the top Photo 1 Photo 2 Front panel 11 1 MS 30SV INDOOR UNIT A1 2 Removing the electronic control P C board and the dis play 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 clam...

Page 41: ...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 Remove the water cut 5 ...

Page 42: ...e 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 motor shaft cut sectio...

Page 43: ...ws 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 Recover ga...

Page 44: ... in Wiring Diagram Q ty unit Including No 2 6 7 3PCS SET 4PCS SET AIR CLEANING DEODORIZING Remarks Part No NO Part Name 1 2 3 4 5 6 7 8 9 10 1 1 2 1 1 3 4 1 1 1 WH MS 30SV A1 12 2 INDOOR UNIT HEAT EXCHANGER 4 7 6 3 2 5 11 8 13 12 1 CATCH SCREW CAP E02 527 620 E02 527 667 E02 527 666 INDOOR HEAT EXCHANGER UNION LIQUID UNION GAS 9 52 15 88 11 12 13 1 1 1 12 2 INDOOR UNIT HEAT EXCHANGER 12 1 INDOOR U...

Page 45: ...MOTOR SUPPORT SET LEFT FUSE VARISTOR DISPLAY P C BOARD RECEIVER ASSEMBLY MOTOR VAND Symbol in Wiring Diagram Q ty unit UP DOWN RIGHT LEFT RC4V40 Including RUBBER MOUNT 4P AUTO RESTART Including No 21 3 15A Remarks Part No NO Part Name MV1 MV2 MF RT11 RT12 RT13 TB F11 NR11 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MS 30SV A1 WH Part numbers that are circled are not shown in the illustration MS 30...

Page 46: ...U 30SV 12 5 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS A1 2 31 15 5 20 6 21 3 10 18 16 7 13 1 17 20 22 9 19 8 23 24 27 28 29 12 11 30 32 4 A B 28 OB255 2qxp 7 20 00 10 13 AM Page 46 ...

Page 47: ...TDOOR HEAT EXCHANGER COMPRESSOR COMPRESSOR RUBBER SET BASE STOP VALVE LIQUID STOP VALVE GAS MOTOR SUPPORT CAPILLARY TUBE CAPILLARY TUBE PROPELLER FAN PROPELLER FAN NUT OUTDOOR FAN MOTOR COMPRESSOR CAPACITOR TERMINAL BLOCK TERMINAL BLOCK THERMISTOR DEICER P C BOARD NOISE FILTER P C BOARD SOFT START RELAY SURGE ABSORBER FUSE VARISTOR REAR GUARD HANDLE OUTDOOR FAN CAPACITOR EXPANSION VALVE EXPANSION ...

Page 48: ... 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 MAC 2200DF Model Part No MS 30SV A1 MAC 1700FT Model Part No MS 30SV A1 3m 5m 7m 10m 15m 15 88 5 8 9 52 3 8 31 27 MAC 860PIE MAC 861PIE MAC 862...

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