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31

MSZ-D30NA- 

8

  MSZ-D36NA- 

8

  MSY-D30NA- 

8

  MSY-D36NA- 

8

Indoor electronic control P.C. board

Cement resistor (R111) 

approximately 4Ω

(+)0 V DC or 

15 V DC

230 V AC

Fuse (F11)

T3.15AL250V

Indoor coil thermistor/ 

RT12 (CN112)(MAIN) 

RT13 (CN112)(SUB)
Horizontal vane 

motor (CN151)

SW P.C. board

Power monitor 

receiver 

P.C. board

12 V DC

5 V DC

(+)3-6 V DC

15 V DC

(-) Fiducial terminal of 

cathode side on measur-

ing high-voltage DC

325 V DC

Power supply input

Indoor fan motor

(CN211)

}

Varistor (NR11)

Room temperature

thermistor/RT11 

(CN111)

}

Timer short 

mode point 

JPG, JPS

(Refer to 7-1.)

Vertical vane motor (CN152)

Indoor coil thermistor [RT12 (MAIN), RT13 (SUB)]

Room temperature thermistor (RT11)

Temperature (°F)

Resistance (kΩ)

40

30

20

10

0

32 50 68 86 104 122 140

Release of Auto restart function

Solder the Jumper wire to JR07

(Refer to 7-3.)

 (+)

 (-)

Receiver P.C.board connector 

(CN301)

OBH501D

Содержание MSZ-D30NA

Страница 1: ...ROPROCESSOR CONTROL 12 9 TROUBLESHOOTING 19 10 DISASSEMBLY INSTRUCTIONS 32 Models MSZ D30NA MSZ D30NA 8 MSZ D36NA MSZ D36NA 8 MSY D30NA MSY D30NA 8 MSY D36NA MSY D36NA 8 No OBH501 REVISED EDITION D INDOOR UNIT Outdoor unit service manual MUZ D NA Series OBH502 MUY D NA Series OBH502 PARTS CATALOG OBB501 OBH501 REVISED EDITION C is void Revision D 9 7 TEST POINT DIAGRAM AND VOLTAGE has been modifie...

Страница 2: ...ventilation After stopping the operation of the air conditioner turn off the power supply breaker and pull the power plug Discharge the capacitor before the work involving the electric parts Precautions during the repair service Do not perform the work involving the electric parts with wet hands Do not pour water into the electric parts Do not touch the refrigerant Do not touch the hot or cold are...

Страница 3: ...0NA MSZ D36NA 8 1 Electronic control P C board has been changed MSZ D36NA MSZ D36NA 8 1 Electronic control P C board has been changed MSY D30NA MSY D30NA 8 1 Electronic control P C board has been changed MSY D36NA MSY D36NA 8 1 Electronic control P C board has been changed OBH501D ...

Страница 4: ...r 3 5 1 6 mm Black 2 Battery AAA for remote controller 2 Wireless remote controller 1 Felt tape Used for left or left rear piping 2 L Joint pipe 1 Conduit plate 1 Air cleaning filter 2 Remote controller Operation indicator lamp Remote control receiving section Emergency operation switch Horizontal vane Air outlet Air filter Catechin air filter Air inlet Front panel Air cleaning filter Anti Allergy En...

Страница 5: ...848 887 350 576 763 798 HEAT Dry 445 639 848 887 445 639 848 887 Moisture removal pt h 9 9 11 3 11 9 Sound level Low Med High Powerful Cooling dB A 32 42 49 51 Heating 34 42 49 50 34 42 49 50 Cond drain connection O D in 5 8 Dimensions W in 46 1 16 D 11 5 8 H 14 3 8 Weight Ib 40 External finish Munsell 1 0Y 9 2 0 2 Remote controller Wireless type Control voltage by built in transformer 12 24 V DC ...

Страница 6: ...65 Minimum temperature 70 60 14 13 3 2 OUTLET AIR SPEED AND COVERAGE RANGE Model Mode Function Airflow CFM Air speed ft sec Coverage range ft MSZ D30NA MSZ D36NA HEAT Dry 848 23 6 45 0 MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA COOL Dry 848 23 6 45 0 Wet 763 21 3 40 7 The air coverage range is the figure up to the position where the air speed is 1 ft sec when air is blown out horizon tally from the u...

Страница 7: ... 8 1 7 8 4 11 16 7 8 11 5 8 1 7 8 1 8 5 3 8 5 7 8 2 5 8 2 1 2 2 15 16 ø1 1 4 O D ø9 16 I D ø1 15 16 O D ø1 1 4 I D ø3 8 19 11 16 Flared connection ø3 8 ø5 8 16 7 8 Joint connection ø5 8 Joint ø1 15 16 O D ø1 1 4 I D ø5 8 Flared connection ø5 8 Insulation ø1 1 8 Connected part ø9 16 O D 4 11 16 or more 8 11 16 or more 9 3 8 or more 4 3 16 or more 3 8 or more 2 3 16 or more In case of left left back...

Страница 8: ...8 5 WIRING DIAGRAM MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA MSZ D30NA 8 MSZ D36NA 8 MSY D30NA 8 MSY D36NA 8 OBH501D ...

Страница 9: ...in heating MSZ D30NA MSZ D36NA only Indoor heat exchanger Strainer Room temperature thermistor RT11 Refrigerant pipe ø5 8 with heat insulator Flared connection Indoor coil thermistor RT12 Main Refrigerant pipe ø3 8 with heat insulator Distributor Indoor coil thermistor RT13 Sub Joint Flared connection Joint connection OBH501D ...

Страница 10: ...r 3 times at first After finish modification put back the batteries then press the RESET button J2 J1 The P C board has the print J1 and J2 Solder J1 and J2 according to the number of indoor unit as shown in Table 1 After modification press the RESET button Table 1 1 unit operation 2 units operation 3 units operation 4 units operation No 1 unit No modification Same as at left Same as at left Same ...

Страница 11: ...orized when 10 seconds have passed after the indoor unit was operated with the remote controller If main power is turned OFF or a power failure occurs while AUTO START STOP timer is active the timer setting is cancelled If the unit has been off with the remote controller before power failure the auto restart function does not work as the power button of the remote controller is off To prevent brea...

Страница 12: ... 2 C or more away from set temperature The room temperature is approaching the set temperature About 2 F 1 C to 4 F 2 C from set temperature INDOOR UNIT DISPLAY SECTION Lit Blinking Not lit Signal transmitting section Operation display section Temperature buttons OPERATE STOP ON OFF button NOTE Use the remote controller provided with the unit only Do not use other remote controller Indication of r...

Страница 13: ...tem perature is low or when defrosting is being done the indoor fan will stop or rotate in Very Low speed 2 High pressure protection The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con densing pressure from increasing excessively When the temperature of indoor heat exchanger becomes too high the high pressure protection works The in...

Страница 14: ... When the TOO COOL or TOO WARM button is pressed the microprocessor changes the set temperature considering the room temperature the frequency of pressing TOO COOL or TOO WARM button and the user s preference to heat or cool So this is called Fuzzy control and works only in I FEEL CONTROL mode In DRY mode of I FEEL CONTROL the set temperature doesn t change To raise the set temperature 2 4 F 1 2 C...

Страница 15: ...the vane angle at Angle 4 5 when the compressor cumulative operation time exceeds 1 hour the vane angle automatically changes to Angle 1 for dew prevention 7 SWING mode By selecting SWING mode with VANE CONTROL button the horizontal vane swings vertically 8 Cold air prevention in HEAT operation MSZ The horizontal vane position is set to Upward 9 ECONO COOL operation ECONOmical operation When ECONO...

Страница 16: ...angle Confirming of standard position is performed a OPERATE STOP ON OFF button is pressed POWER ON OFF b SWING is started or finished c The power supply turns ON 4 SWING MODE By selecting SWING mode with WIDE VANE button the vertical vane swings horizontally The remote controller displays 5 WIDE MODE By selecting WIDE mode with WIDE VANE button indoor fan speed becomes faster than setting fan spe...

Страница 17: ...ng a Press OFF TIMER button during operation b Set the time of the timer using TIME SET buttons and Each time FORWARD button is pressed the set time increases by 10 minutes each time BACKWARD button is pressed the set time decreases by 10 minutes 2 To release the timer To release ON timer press ON TIMER button To release OFF timer press OFF TIMER button TIMER is cancelled and the display of set ti...

Страница 18: ...n VANE AUTO mode Emergency operation continues until the emergency operation switch is pressed once or twice or the unit receives any signal from the remote controller In case of latter normal operation will start NOTE Do not press the emergency operation switch during normal operation 8 11 CHANGING TEMPERATURE INDICATION F C 8 10 3 MINUTE TIME DELAY OPERATION When the system turns OFF compressor ...

Страница 19: ...ke sure check how many times the OPERATION INDICATOR lamp is blinking on and off before starting service work 2 Before servicing verify that all connectors and terminals are connected properly 3 When the electronic control P C board seems to be defective check for disconnection of the copper foil pattern and burnt or discolored components 4 When troubleshooting refer to 9 2 9 3 and 9 4 4 How to re...

Страница 20: ...heck the blinking pattern and confirm the abnormal point with the table of indoor unit failure mode recall function Refer to 9 2 2 Make sure to check at least 2 consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller The ou...

Страница 21: ...cteristics of the main indoor coil thermistor the sub indoor coil thermistor 9 7 3 time blink 2 5 second OFF Serial signal The serial signal from outdoor unit is not received for a maximum of 6 minutes Refer to 9 6 How to check miswiring and serial signal error 11 time blink 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emit during the 12 seconds the indoor fan op...

Страница 22: ...amp Blink on and off at 0 5 sec ond intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal Left lamp 2 time blink Cause Indoor unit Trouble of room tem perature indoor coil thermistor Left lamp 3 time blink Cause Indoor unit Trouble of indoor fan motor Left lamp 4 time blink Cause Indoor unit Trouble of indoor unit control sys tem Left lamp 5 time blink Cause Outdoor unit Outdoo...

Страница 23: ...Left lamp blinks 4 time blink 2 5 second OFF Indoor unit and outdoor unit do not operate It cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board 5 Outdoor power system Left lamp blinks 5 time blink 2 5 second OFF Indoor unit and outdoor unit do not operate It consecutively occurs 3 times that the compressor s...

Страница 24: ...o 9 7 Test point diagram and voltage Indoor electronic control P C board the chart of thermistor Indoor fan motor MF Check 9 6 Horizontal vane motor MV1 Vertical vane motor MV2 Measure the resistance between the terminals with a multimeter Part temperature 50 86 F Horizontal vane motor MV1 Color of the lead wire Normal BRN other one 240 260 Ω Vertical vane motor MV2 Color of the lead wire Normal B...

Страница 25: ...he voltage between CN211 and 2 Measure the voltage between CN211 and If 12 seconds or more passes after the emergency operation switch is pressed the voltage mentioned above 2 goes 0 V DC although the indoor electronic control P C board is normal Is there 294 325 V DC between CN211 and and does the voltage between CN211 and rise to the range of 3 to 6 V DC within 12 seconds after the emer gency op...

Страница 26: ...eck if the unit operates with the remote controller Yes No Turn ON a radio to AM and press switch ON the remote controller Is noise heard from radio Yes No Replace the remote controller Are there any fluorescent lights of inverter or rapid start type within the range of 3 28 ft Yes No Reinstall the unit away from lights Attach a filter on receiving part Measure the voltage between receiver P C boa...

Страница 27: ...or electronic control P C board Are the varistor NR11 burnt and the fuse F11 blown No No Yes Yes Be sure to check both the fuse and the varistor in any case Is the fuse F11 blown only Measure the resistance between and of the indoor fan motor connector to CN211 on the indoor electronic control P C board 1 2 1 The fan motor connector s lead wire is red whereas is black 2 Connect of the multimeter t...

Страница 28: ...nverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Turn OFF the power supply Remove the short circuit between out door terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20 V DC between outdoor terminal block S2 and S3 Confirmation of serial signal Yes No Is there any error of the indoor outdoor con...

Страница 29: ...h or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indo...

Страница 30: ...tor RT12 CN112 MAIN RT13 CN112 SUB Horizontal vane motor CN151 SW P C board Power monitor receiver P C board 12 V DC 5 V DC 3 6 V DC 15 V DC Fiducial terminal of cathode side on measur ing high voltage DC 325 V DC Power supply input Indoor fan motor CN211 Varistor NR11 Room temperature thermistor RT11 CN111 Timer short mode point JPG JPS Refer to 7 1 Vertical vane motor CN152 Release of Auto resta...

Страница 31: ... 3 6 V DC 15 V DC Fiducial terminal of cathode side on measur ing high voltage DC 325 V DC Power supply input Indoor fan motor CN211 Varistor NR11 Room temperature thermistor RT11 CN111 Timer short mode point JPG JPS Refer to 7 1 Vertical vane motor CN152 Indoor coil thermistor RT12 MAIN RT13 SUB Room temperature thermistor RT11 Temperature F Resistance kΩ 40 30 20 10 0 32 50 68 86 104 122 140 Rel...

Страница 32: ...rol P C board 8 Remove the screw on lower side of the electrical box See photo 3 Remove the electrical box 9 Remove the indoor electronic control P C board 10 Remove the SW holder from the electrical box 11 Open the SW holder and pull out the SW P C board 12 Remove the power monitor receiver holder from the electri cal box 13 Open the power monitor receiver holder and pull out the power monitor re...

Страница 33: ... shaft of the vertical vane motor 6 Remove the vertical vane motor from the vertical vane motor unit 7 Disconnect the connector of vertical vane motor from the vertical vane motor 5 Removing the horizontal vane motor 1 Remove the nozzle assembly Refer to section 3 2 Remove the screws of the horizontal vane motor unit and pull out the horizontal vane motor unit 3 Disconnect the connector from the h...

Страница 34: ... the hooks of the motor bed 8 Remove the motor band and the motor bed together with indoor fan motor Be careful not to drop the indoor fan motor because it is heavy 9 Remove the screw of the motor band and remove the motor band then pull out the indoor fan motor 10 Remove the screws of the left side of the heat exchanger 11 Lift the left side of the heat exchanger 12 Remove the line flow fan to th...

Страница 35: ...ked position Do not pull the lead wire when removing the indoor coil thermistor Holder shape Clip shape When fixing the indoor coil thermistor to the clip shape holder shape part the lead wire should point down 1 Set the indoor coil thermistor in the center of the clip shape part 2 Check the marked mounting position 3 Mount the clip shape part Position and procedure for mounting the clip shape par...

Страница 36: ...HI ELECTRIC CORPORATION Issued Nov 2021 No OBH501 REVISED EDITION D Issued Apr 2011 No OBH501 REVISED EDITION C Issued Jun 2008 No OBH501 REVISED EDITION B 6 Issued Mar 2008 No OBH501 REVISED EDITION A 7 Published Feb 2008 No OBH501 7 Made in Japan Specifications are subject to change without notice ...

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