Mitsubishi Electric Mr.SLIM SEZ Series Technical & Service Manual Download Page 30 | Manualshive

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29

REFRIGERANT SYSTEM DIAGRAM

6

Pipe temperature
thermistor/liquid
(TH2)

Distributor

Condenser/evaporator
temperature thermistor
(TH5)

Room temperature
thermistor (TH1)

Refrigerant flow in cooling

Refrigerant flow in heating

Strainer
#50

Strainer
#50

Heat exchanger

Refrigerant GAS pipe connection
(Flare)

Refrigerant LIQUID pipe connection
(Flare)

SEZ-M25DA(L)
SEZ-M35DA(L)
SEZ-M50DA(L)
SEZ-M60DA(L)
SEZ-M71DA(L)

HWE17040.qxd 17.11.7 16:41 Page 29

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Summary of Contents for Mr.SLIM SEZ Series

Page 1: ...RVICE MANUAL Model name Indoor unit Model name Indoor unit SEZ M25DA L SEZ M35DA L SEZ M50DA L SEZ M60DA L SEZ M71DA L Series SEZ 2018 INDOOR UNIT WIRED REMOTE CONTROLLER optional for DA type WIRELESS REMOTE CONTROLLER supplied for DAL type ON OFF TEMP ...

Page 2: ...2 2 PART NAMES AND FUNCTIONS 8 3 SPECIFICATIONS 13 4 OUTLINES AND DIMENSIONS 26 5 WIRING DIAGRAM 28 6 REFRIGERANT SYSTEM DIAGRAM 29 7 TROUBLESHOOTING 30 8 DISASSEMBLY PROCEDURE 42 CONTENTS HWE17040 qxd 17 11 7 16 41 Page 1 ...

Page 3: ... refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released Make sure that the inside and outside of refrige rant piping is clean and i...

Page 4: ...e refrigerant pipes 12 When performing brazing work be sure to ventilate the room sufficiently Make sure that there are no hazardous or flammable materials nearby When performing the work in a closed room small room or similar location make sure that there are no refriger ant leaks before performing the work If refrigerant leaks and accumulates it may ignite or poisonous gases may be released 13 D...

Page 5: ...ipment Where electrical components are being changed they shall be fit for the purpose and to the correct specification At all times the manufacturer s maintenance and service guidelines shall be followed If in doubt consult the manufacturer s technical department for assistance The following checks shall be applied to installations using flammable refrigerants The charge size is in accordance wit...

Page 6: ...for flammable refrigerants it is important that best practice is followed since flammability is a considera tion The following procedure shall be adhered to remove refrigerant purge the circuit with inert gas evacuate purge again with inert gas open the circuit by cutting or brazing The refrigerant charge shall be recovered into the correct recovery cylinders For appliances containing flammable re...

Page 7: ...hat only appropriate refrig erant recovery cylinders are employed Ensure that the correct number of cylinders for holding the total system charge are available All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant i e special cylinders for the recovery of refrigerant Cylinders shall be complete with pressure relief valve and associated shut off val...

Page 8: ... side pressure of 5 3MPa G or over 2 Charge hose Use pressure performance of 5 09MPa G or over 3 Electronic weighing scale 4 Gas leak detector Use the detector for R134a R407 R410A or R32 5 Adaptor for reverse flow check Attach on vacuum pump 6 Refrigerant charge base 7 Refrigerant cylinder R32 or R410A refrigerant Cylinder with syphon 8 Refrigerant recovery equipment Electronic weighing scale Uni...

Page 9: ...8 2 PART NAMES AND FUNCTIONS Indoor Unit SEZ M25DA L SEZ M35DA L SEZ M50DA L SEZ M60DA L SEZ M71DA L Air outlet duct flange Air outlet Air inlet HWE17040 qxd 17 11 7 16 41 Page 8 ...

Page 10: ...lation Manual Note All icons are displayed for explanation 5 6 1 2 3 4 Press to turn ON OFF the indoor unit 1 ON OFF button This lamp lights up in green while the unit is in operation It blinks while the remote controller is starting up or when there is an error Press to save the setting Main display Press to change the operation mode Main menu Press to move the cursor down Press to return to the ...

Page 11: ...Restriction Maintenance Initial setting ON OFF timer Auto OFF timer Temp range Operation lock Manual vane angle Main Sub Timer Main display Contrast Display details Auto mode Administrator password Language selection Daylight saving time Service Input maintenance info Function setting Check Self check Maintenance password Remote controller check Test run Clock Auto descending panel Menu structure ...

Page 12: ... cannot be operated Initial setting Main Sub When connecting 2 remote controllers one of them needs to be designated as a sub controller Clock Use to set the current time Main display Use to switch between Full and Basic modes for the Main display The initial setting is Full Contrast Use to adjust screen contrast Daylight saving time Sets the daylight saving time Initial setting Display details Ma...

Page 13: ...older included with the remote controller on a wall and be sure to always place the remote controller in the holder after use CLOCK CHECK RESET SET TESTRUN MODE FAN VANE LOUVER min h AUTOSTART AUTOSTOP ON OFF TEMP NOT AVAILABLE MODELSELECT TESTRUN CHECK SET TEMPERATURE button SET TEMPERATURE button sets and any desired room temperature AUTO STOP AUTO START button Used for selecting timed starting ...

Page 14: ...minal block Power outlet A Accessory 3 Min size of wire Amperage of wire breaker 19 to 30 67 to 86 17 to 28 63 to 83 220 240V 50 60Hz 0 04 0 39 Sirocco fan x 2 5 15 35 50 DC blushless motor 0 096 Direct driven 5 5 7 0 9 0 Galvanized 200 x 700 x 700 7 7 8 x 27 9 16 x 27 9 16 17 5 1 6 1 8 15 ø6 35 ø1 4 Flare ø9 52 ø3 8 Flare O D 32 1 9 32 23 26 30 Polystyrene foam Polyethylene foam Urethane foam PP ...

Page 15: ...Power outlet A Accessory 3 Min size of wire Amperage of wire breaker 19 to 30 67 to 86 17 to 28 63 to 83 220 240V 50 60Hz 0 07 0 63 Sirocco fan x 3 5 15 35 50 DC blushless motor 0 096 Direct driven 10 0 12 5 15 0 Galvanized 200 x 900 x 700 7 7 8 x 35 7 16 x 27 9 16 22 1 6 1 8 15 ø6 35 ø1 4 Flare ø12 7 ø1 2 Flare O D 32 1 9 32 30 34 37 Polystyrene foam Polyethylene foam Urethane foam PP Honeycomb f...

Page 16: ...pacity indicates the maximum value at operation under the following condition 3 Wired Remote Controller optional for DA model Wireless Remote Controller supplied for DAL model Refrigerant piping diameter R32 R410A Sound pressure level Low Mid High measured in anechoic room Heat exchanger Terminal block Power outlet A Accessory 3 Min size of wire Amperage of wire breaker 19 to 30 67 to 86 17 to 28 ...

Page 17: ...HOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz SEZ M25DA L External static pressure 50Pa High Middle 33 SPL dB 29 Low 25 LINE 50 60Hz NOTCH 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OC...

Page 18: ...IMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz SEZ M35DA L External static pressure 50Pa High Middle 35 SPL dB 31 Low 25 LINE 50 60Hz NOTCH 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC ...

Page 19: ...IMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz SEZ M50DA L External static pressure 50Pa High Middle 39 SPL dB 36 Low 32 LINE 50 60Hz NOTCH 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC ...

Page 20: ...IMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz SEZ M60DA L External static pressure 50Pa High Middle 39 SPL dB 36 Low 32 LINE 50 60Hz NOTCH 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC ...

Page 21: ... FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz SEZ M71DA L External static pressure 50Pa High Middle 42 SPL dB 37 Low 32 LINE 50 60Hz NOTCH 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND...

Page 22: ...e Pa SEZ M25DA L External static pressure 5Pa 220 240V 50 60Hz Middle Low High Rated point Limit 0 10 20 30 40 50 60 70 80 4 5 6 7 8 9 10 Airflow rate m3 min External static pressure Pa SEZ M25DA L External static pressure 50Pa 220 240V 50 60Hz Middle Low High Limit Rated point 0 10 20 30 40 50 60 70 80 4 5 6 7 8 9 10 Airflow rate m3 min External static pressure Pa SEZ M25DA L External static pres...

Page 23: ...al static pressure 5Pa 220 240V 50 60Hz Middle Low High Limit Rated point 0 20 10 30 40 50 60 70 80 External static pressure Pa Airflow rate m3 min SEZ M35DA L External static pressure 50Pa 220 240V 50 60Hz 6 7 8 9 10 11 12 Middle Low High Limit Rated point 0 20 10 30 40 50 60 70 80 External static pressure Pa SEZ M35DA L External static pressure 35Pa 220 240V 50 60Hz 6 7 8 9 10 11 12 Airflow rate...

Page 24: ... 0 40 30 20 10 8 9 10 11 12 13 14 15 16 Middle Low High Limit Rated point External static pressure Pa SEZ M50DA L External static pressure 50Pa 220 240V 50 60Hz Airflow rate m3 min 8 9 10 11 12 13 14 15 16 0 10 20 30 40 50 60 70 80 Middle Low High Limit Rated point External static pressure Pa SEZ M50DA L External static pressure 35Pa 220 240V 50 60Hz Airflow rate m3 min 8 9 10 11 12 13 14 15 16 0 ...

Page 25: ...1 12 13 14 15 16 17 18 19 0 40 30 20 10 Middle Low High Limit Rated point External static pressure Pa SEZ M60DA L External static pressure 50Pa 220 240V 50 60Hz Airflow rate m3 min 9 10 11 12 13 14 15 16 17 18 19 0 10 20 30 40 60 70 50 80 Middle Limit Rated point Low High External static pressure Pa SEZ M60DA L External static pressure 35Pa 220 240V 50 60Hz Airflow rate m3 min 9 10 11 12 13 14 15 ...

Page 26: ... 20 10 11 12 13 14 15 16 17 18 19 20 21 Middle Low High Limit Rated point External static pressure Pa SEZ M71DA L External static pressure 50Pa 220 240V 50 60Hz Airflow rate m3 min 21 20 19 18 17 16 15 14 13 12 11 0 10 20 30 40 50 80 70 60 Middle Low High Limit Rated point External static pressure Pa SEZ M71DA L External static pressure 35Pa 220 240V 50 60Hz Airflow rate m3 min 0 10 20 30 40 50 80...

Page 27: ... line Suspension bolt hole 4 14X30 Slot Air filter Control box 2XE 2 9 2X2 2 9 L 2 9 Knockout hole 27 Indoor outdoor connecting line Knockout hole 27 Remote controller transmission line 10 170 57 15 20 100 100X E 1 F 30 D Duct 625 Suspension bolt pitch 90 A 23 B Suspension bolt pitch C 23 677 700 25 100 23 150 Duct 116 70 270 102 25 49 10 88 100 100XJ K 88 12 12 37 100 20 157 5 20 H 200 37 Note1 U...

Page 28: ...ection and replacement of the motor fan drain pump heat exchanger and electric box in one of the following ways Select an installation site for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects 1 When a space of 300 mm or more is available below the unit between the unit and the ceiling Fig 1 Create access door 1 and 2 450 x 450 mm each as shown ...

Page 29: ...OOR POWER SUPPLY I B LED1 POWER SUPPLY I B CN90 CONNECTOR WIRELESS ZNR01 02 VARISTOR AUX RELAY X1 FUSE FUSE AC250V 6 3A DSA CONNECTOR CENTRALLY CONTROL CN41 CN51 CONNECTOR HA TERMINAL A CN2L NAME SYMBOL EXPLANATION SW1 SW2 INDOOR CONTROLLER BOARD CN32 I B SYMBOL SYMBOL NAME CONNECTOR LOSSNAY CONNECTOR REMOTE SWITCH SWE ARRESTER SWITCH FOR MODEL SELECTION SWITCH FOR CAPACITY CODE CONNECTOR EMERGENC...

Page 30: ... thermistor TH5 Room temperature thermistor TH1 Refrigerant flow in cooling Refrigerant flow in heating Strainer 50 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Refrigerant LIQUID pipe connection Flare SEZ M25DA L SEZ M35DA L SEZ M50DA L SEZ M60DA L SEZ M71DA L HWE17040 qxd 17 11 7 16 41 Page 29 ...

Page 31: ...ing details Judge what is wrong and take a corrective action according to 7 3 SELF DIAGNOSIS ACTION TABLE Conduct troubleshooting and ascertain the cause of the trouble according to 7 4 TROUBLESHOOTING BY INFERIOR PHENOMENA 1 2 Reset check code logs and restart the unit after finishing service 3 There is no abnormality in electrical component controller board remote controller etc 1 Re check the a...

Page 32: ...eration For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED1 power for microcomputer Indicates whether control power is supplied Make sure that this LED is always lit LED2 power for remote controller Indicates whether power is supplied to the remote controller This LED lights only in the case of the indoor unit which is connected to the outdoor u...

Page 33: ... interruption When compressor locked Abnormal high discharging temperature 49C worked insufficient refrigerant Abnormal high pressure 63H worked Overheating safeguard operation Abnormal temperature of heat sink Outdoor unit fan protection stop Compressor overcurrent interruption Abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or v...

Page 34: ...unication between indoor and outdoor units AUTO RESTART FUNCTION Indoor controller board This model is equipped with the AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode set temperature and the fan speed are memorized by the indoor controller board The auto restart function sets to work the moment the power has restored after power failure then...

Page 35: ...ove 2 Check contact failure of connector CN44 on the indoor controller board Refer to 7 5 Turn the power on again and check restart after inserting connector again 4 Check pipe liquid temperature with remote controller in test run mode If pipe liquid temperature is extremely low in cooling mode or high in heating mode refrigerant circuit may have defective 5 Check pipe liquid temperature with remo...

Page 36: ...tive Indoor controller board is defective 5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit clogs 8 Bypass circuit of outdoor unit is defective Cooling or drying mode 1 Check clogging of the filter 2 Remove shields 4 Refer to 7 7 DC FAN MOTOR FAN MOTOR INDOOR CONTROLLER BOARD 5 Check outdoor fan motor 67 Check operating condition of refrigerant circuit Hea...

Page 37: ...entioned problem of 1 3 4 Diagnose remote controllers a When RC OK is displayed Remote controllers have no problem Turn the power off and on again to check If abnormality generates again replace indoor controller board b When RC NG is displayed Replace remote controller c When RC E3 is displayed d When ERC 00 06 is displayed c d Noise may be causing abnormality If the unit is not normal after repl...

Page 38: ...ransmit signals Error Code Abnormal point and detection method Cause Countermeasure Fb Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board 1 Defective indoor controller board 1 Replace indoor controller board E1 or E2 Remote controller control board 1 Abnormal if data cannot be read normal ly from the nonvolatile memory of the...

Page 39: ... 2 LED2 on indoor controller board is blinking When LED1 on indoor controller board is also blinking Connection failure of indoor outdoor unit connecting wire When LED1 is lit 1 Mis wiring of remote controller wires Under twin triple indoor unit system 2 or more indoor units are wired together 2 Refrigerant address for outdoor unit is wrong or not set Under grouping control system there are some u...

Page 40: ...Indoor outdoor transmission 0 24VDC CNMF Fan motor output 1 4 310 340 VDC 5 4 15 VDC 6 4 0 6 5 VDC 7 4 Stop 0 or 15 VDC Run 7 5 VDC 0 15 pulse CNP Drain up mechanism output 200VAC CN2L LOSSNAY CN90 Wireless remote controller 1 VFG Voltage on the side of PC672 and C955 Same with the voltage between 7 and 4 of CNMF VCC Voltage between the C955 pins 15 VDC Same with the voltage between 5 and 4 of CNM...

Page 41: ...mperature 10 C 30 C Pipe temperature thermistor liquid TH2 Wiring diagram Check method and criterion Part name Normal 8kΩ 20kΩ Abnormal Opened or short circuited Motor Board with build in motor Current detecting resistor Regulator Hall IC Motor winding Power device Pre driver Vm Power supply for motor Vcc Power supply for control Vsp Speed command voltage PG Pulse output for rotation GND HWE17040 ...

Page 42: ...he voltage in the indoor controller circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector VDC DC310 340V TEST POINT 2 VCC between 5 and 4 of the fan connector VCC DC15V Wiring recovery Replace drain pump DP Replace indoor controller board Replace the fan motor Replace indoor controller board I B Replace fan motor MF Replace indoor controller board Replace the fan motor Is the voltage...

Page 43: ...over A to remove it 2 Thermistor Intake air 1 Remove the control box cover according to the procedure in section 1 1 Pull out the thermistor holder B and thermis tor C on the control box A Fig 1 Fig 2 SEZ M DA model only M71DA L model only B C Fig 3 DISASSEMBLY PROCEDURE 8 Exercise caution when removing heavy parts HWE17040 qxd 17 11 7 16 41 Page 42 ...

Page 44: ... 2 Remove the fixing screws on the bottom plate D E to remove it 2 Removing the drainpan 1 Pull out the drain pan in the direction of the arrow 1 Note Drain the water out of the drain pan before removing it To avoid dew condensation use insulated screws in the places marked with circles in Fig 6 D E a a a a a Tab Fig 4 Fig 5 Insulation material E Fig 6 HWE17040 qxd 17 11 7 16 41 Page 43 ...

Page 45: ...nger cover 1 Remove the four fixing screws on the heat exchanger cover F to remove it 3 Removing the thermistor 1 Remove the thermistor G from the thermistor holder H on the copper tube Thermistor size Liquid pipe ø8mm Condenser evaporator ø6mm F Fig 7 G H Fig 8 Exercise caution when removing heavy parts HWE17040 qxd 17 11 7 16 41 Page 44 ...

Page 46: ...he top half of the fan casing off Fig 12 Exercise caution when removing heavy parts 2 Removing the fan casing bottom half 1 Squeeze the tabs on the fan casing to remove it in the direction of arrow 2 a a Tab Fig 10 5 Fan and fan motor 1 Removing the filter and the bottom plate 1 Push down the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on th...

Page 47: ...changer 1 Remove the drain pan according to the proce dure in section 3 2 Remove the heat exchanger cover according to the procedure in section 4 2 3 Removing the cover 1 Remove the two fixing screws on the cover L to remove it 4 Removing the Heat exchanger 1 Remove the fixing screws on the heat exchanger M to remove it L Fig 15 M Fig 16 Exercise caution when removing heavy parts HWE17040 qxd 17 1...

Page 48: ...HWE17040 qxd 17 11 7 16 41 Page 47 ...

Page 49: ...HWE17040 qxd 17 11 7 16 41 Page 48 ...

Page 50: ...HWE17040 New publication effective Nov 2017 Specifications subject to change without notice www MitsubishiElectric com ...

Page 51: ...andard Inverter Product Information Sheet SEZ M25 71DA Declaration of Conformity MCPEU11004F SEZ M25 71DA Installation Manual VZ79D586H02 SEZ M25 71DA Instruction Book VZ79D585H02 SEZ M25 71DA Parts List BWE017250 SEZ M25 71DA Service Manual HWE17040 ...

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