Mitsubishi Electric Mr. Slim MSZ-FD09NA Service Manual Download Page 27 | Manualshive

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27

L AREA R

POWER

No.

Abnormal

point

Operation indicator lamp

Symptom

Condition

Correspondence

1

MXZ type

Operation
mode
setting

POWER lamp is lighted.
AREA lamps

fl

ash.

2.5-second OFF

Outdoor unit
operates but
indoor unit does
not operate.

The operation mode of the each indoor unit
is differently set to COOL (includes DRY) and
HEAT at the same time, the operation mode
of the indoor unit that has operated at

fi

rst has

the priority.

Unify the operation mode.
Refer to outdoor unit service
manual.

•

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Summary of Contents for Mr. Slim MSZ-FD09NA

Page 1: ...ESSOR CONTROL 12 9 TROUBLESHOOTING 22 10 DISASSEMBLY INSTRUCTIONS 36 MSZ FD09NA MSZ FD12NA No OBH497 REVISED EDITION C SPLIT TYPE AIR CONDITIONERS INDOOR UNIT Outdoor unit service manual MUZ FD NA Series OBH498 MXZ A NA Series OB444 NOTE RoHS compliant products have G mark on the spec name plate PARTS CATALOG OBB497 Revision C 3 SPECIFICATION has been corrected Please void OBH497 REVISED EDITION B...

Page 2: ...2 Revision A 3 SPECIFICATION has been corrected Revision B 3 SPECIFICATION has been corrected Revision C 3 SPECIFICATION has been corrected ...

Page 3: ...3 1 TECHNICAL CHANGES MSZ FD09NA MSZ FD12NA 1 New model ...

Page 4: ...troller holder 1 Fixing screw for 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 1 AREA lamp indicates AREA setting In AREA setting the horizontal air flow direction changes automatically according to the detection of i see Sensor which detects the floor wall temperature to air condition the room evenly i see control ...

Page 5: ...62 226 381 410 144 202 350 367 HEAT Dry CFM 166 240 367 381 166 240 399 420 Moisture removal pt h 2 1 2 9 Sound level Low Med High Powerful Cooling dB A 22 31 39 42 22 33 43 45 Heating dB A 22 31 40 42 22 33 43 44 Cond drain connection O D in 5 8 Dimensions W in 31 13 32 D 10 1 8 H 11 5 8 Weight Ib 27 External finish Munsell 1 0Y 9 2 0 2 Remote controller Wireless type Control voltage by built in ...

Page 6: ...or Outdoor DB WB DB WB Cooling Standard temperature 80 67 95 Maximum temperature 90 73 115 Minimum temperature 67 57 14 Maximum humidity 78 Heating Standard temperature 70 60 47 43 Maximum temperature 80 67 75 65 Minimum temperature 70 60 5 15 U model 4 14 U model 3 1 OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed voltage V Indoor unit 208 230 V 1 phase 60 Hz Min 187 208 230 Max 253 Model...

Page 7: ... 16 3 3 8 3 13 16 Air out Indoor unit 2 1 8 1 5 8 2 1 2 Installation plate 7 16 X 1 Oblong hole 8 7 8 8 7 8 8 3 8 10 13 9 16 13 6 1 8 6 1 8 Wall hole ø2 9 16 2 11 16 1 8 1 5 8 8 5 16 9 1 8 9 15 16 7 8 2 1 2 7 16 X 13 16 Oblong hole ø1 3 8 O D ø1 4 19 11 16 Flared connection ø1 4 ø3 8 16 15 16 Flared connection ø3 8 Insulation ø1 1 8 O D Connected part ø5 8 O D Air in Piping Insulation Liquid line ...

Page 8: ...8 5 WIRING DIAGRAM MSZ FD09NA MSZ FD12NA ...

Page 9: ...ing Refrigerant flow in heating Unit inch Indoor heat exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe 3 8 with heat insulator Refrigerant pipe 1 4 with heat insulator Indoor coil thermistor RT12 main Indoor coil thermistor RT13 sub ...

Page 10: ...n in Table 1 After modification press the RESET button NOTE For modification take out the batteries and press the OPERATE STOP ON OFF but ton twice or 3 times at first After finish modification put back the bat teries then press the RESET button J2 J1 MSZ FD09NA MSZ FD12NA Table 1 1 unit operation 2 units operation 3 units operation 4 units operation No 1 unit No modification Same as at left Same ...

Page 11: ...UTO RESTART FUNCTION automatically starts operation in the same mode just before the shutoff of the main power Operation If the main power has been cut the operation settings remain After the power is restored the unit restarts automatically according to the memory However it takes at least 3 minutes for the compressor to start running How to release AUTO RESTART FUNCTION Turn off the main power o...

Page 12: ...ction OPERATE STOP ON OFF button FAN SPEED CONTROL button OPERATION SELECT button POWERFUL button Indication of remote controller model is on back Temperature buttons NOTE Last setting will be stored after the unit is turned OFF with the remote controller Indoor unit receives the signal of the remote controller with beeps INDOOR UNIT LAMP The lamps at the center of the indoor unit indicates the op...

Page 13: ... temperature operation Low outside temperature operation is as same as COOL mode 8 1 2 8 3 HEAT OPERATION 1 Press OPERATE STOP ON OFF button POWER lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERATION SELECT button 3 Press TEMPERATURE buttons TOO WARM or TOO COOL button to select the desired temperature The setting range is 61 88 F 16 31 C 1 Cold air prevention contro...

Page 14: ...ulti system air conditioner can connect two or more indoor units with one outdoor unit When you try to operate two or more indoor units with one outdoor unit simultaneously one for the cooling and the others for heating the operation mode of the indoor unit that operates earlier is selected Other indoor units cannot operate and operation indicator lamp flashes as shown in the figure below In this ...

Page 15: ...HEAT operation Vane angle is fixed to Angle 4 9 To change the airflow direction not to blow directly onto your body To change the air flow direction When to use this function COOL DRY HEAT Pressing and holding VANE CONTROL button for 2 seconds or more the horizontal vane reverses and moves horizontal posi tion Use this function if you don t want the air from the indoor unit to blow directly onto y...

Page 16: ...he motor are controlled by pulse signals approx 12 V transmitted from microprocessor 2 The vertical vane angle and mode change as follows by pressing WIDE VANE button 3 Positioning The vane presses the vane stopper once to confirm the standard position and then set to the desired angle Confirming of standard position is performed in the following cases a OPERATE STOP ON OFF button is pressed POWER...

Page 17: ...the indoor unit is moved with the stepping motor and it detects the floor wall temperature i see Sensor is installed here Enlarged view of i see Sensor i see Sensor When AREA setting is not activated the sensing range of i see Sensor differs depending on the installation location of the air conditioner Refer to Remote controller in SERVICE FUNCTIONS Install the front panel correctly after being re...

Page 18: ...the remote controller The horizontal air flow direction is controlled in this range Installed at center Installed at left Installed at right Indoor unit display AREA Remote controller display or or Lighted Not lighted L R L R L R L R L R Ex In COOL mode Moving of horizontal air flow direction Indoor unit display NOTE Indication of AREA setting Lighted Not lighted The horizontal air flow direction ...

Page 19: ... the right left and center RIGHT in AREA setting first turning to the LEFT for adjusting the position then CENTER RIGHT CENTER RIGHT CENTER The sensor turns to the right and center LEFT in AREA setting first turning to the LEFT for adjusting the position then CENTER LEFT CENTER LEFT CENTER The sensor turns to the left and center The sensor finishes turning to one area to another for 3 seconds and ...

Page 20: ... setting 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 but ton 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...

Page 21: ...rizontal vane operates in VANE AUTO mode Emergency operation continues until 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 EMERGENCY OPERATION switch during normal operation 8 10 3 MINUTE TIME DELAY OPERATION When the system turns OFF compressor will not restart for 3 mi...

Page 22: ...tion is flashing on and off before starting service work 2 Before servicing check that the connector and terminal are connected properly 3 When the P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 9 2 9 3 and 9 4 4 How to replace batteries Weak batteries may cause the remote controller ...

Page 23: ...abnormal point with the indoor unit failure mode table Refer to 9 2 2 Make sure to check at least two 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 outdoor unit is abnormal Check the blinking pattern and confi...

Page 24: ...he main indoor coil thermistor the sub indoor coil thermistor 9 7 3 time flash 2 5 second OFF Serial signal The serial signal from outdoor unit is not re ceived for a maximum of 6 minutes Refer to 9 6 How to check miswiring and serial signal error 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emit during the 12 seconds the indoor fan operation Refer ...

Page 25: ... 5 sec ond intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal POWER lamp 2 time flash Cause Indoor unit Trouble of room tem perature indoor coil thermistor POWER lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor POWER lamp 4 time flash Cause Indoor unit Trouble of indoor unit control system POWER lamp 5 time flash Cause Outdoor unit Outdoor power system abnorma...

Page 26: ... in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board 5 Outdoor power sys tem POWER lamp flashes 5 time flash 2 5 second OFF It consecutively occurs 3 times that the com pressor stops for overcurrent protection or start up failure protection within 1 minute after start up Refer to How to check of in verter compressor Refer to outdoor ...

Page 27: ...ghted AREA lamps flash 2 5 second OFF Outdoor unit operates but indoor unit does not operate The operation mode of the each indoor unit is differently set to COOL includes DRY and HEAT at the same time the operation mode of the indoor unit that has operated at first has the priority Unify the operation mode Refer to outdoor unit service manual ...

Page 28: ...rt temperature 50 86 F 10 30 C Color of the lead wire Normal Horizontal vane motor MV1 BRN other one 313 375 Ω Vertical vane motor MV2 268 322 Ω i see Sensor motor MT 223 268 Ω i see Sensor RR Cover the i see Sensor with black vinyl tape Then turn ON the power supply i see Sensor is energized Measure the voltage between connector terminals of i see Sensor with a tester Part temperature 50 104 F 10...

Page 29: ...ure the voltage between CN211 and 2 Measure the voltage between CN211 and If more than 12 seconds passes after EMERGENCY OPERATION switch is pressed the voltage measured at 2 above goes 0 VDC although the indoor electronic control P C board is normal Is there 294 325 VDC between CN211 and and does the voltage between CN211 and rise to the range of 3 to 6 VDC within 12 seconds after EMERGENCY OPERA...

Page 30: ...oller visible Remove the batteries then set them back and press RESET button Refer to 9 1 4 Check if the unit operates with the remote controller Yes No Turn ON a radio to AM and press OP ERATE STOP ON OFF button 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...

Page 31: ...istor NR11 and fuse F11 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 1 2 1 The fan motor connector s lead wire is red whereas is black 2 Connect of the tester to fan motor connector s lead wire and to lead wire otherwise the...

Page 32: ...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 VDC between outdoor terminal block S2 and S3 Confirmation of serial signal Yes No Is there any error of the in door outdoor connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block Yes Replace the indoor out door connecti...

Page 33: ...rength 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...

Page 34: ...hermistor RT11 CN111 Indoor coil thermistor RT12 RT13 CN112 Timer short mode point JPG JPS Refer to 7 1 SW P C Board i see Sensor CN110 Fuse F11 Vertical vanes CN151 CN201 Used for check of con ducting of thermal fuse 0 or 15 VDC 3 6 VDC 15 VDC Fiducial terminal of cathode side on measur ing high voltage DC 294 325 VDC Cement resistor R111 Indoor fan motor CN211 Emergency operation switch SW1 208 ...

Page 35: ...35 2 Power monitor receiver P C board 3 Monitor P C board ...

Page 36: ...ushing it upward DISASSEMBLY INSTRUCTIONS 10 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Connector Sleeve Locking lever Photo 1 Screws of the panel Front panel Horizontal vane Terminal with locking mecha...

Page 37: ...ower monitor receiver P C board holder and pull out the power monitor receiver P C board 9 Open the sensor holder and pull out the SW P C board 10 Pull the electronic control P C board slightly toward you from the electrical box and disconnect TAB3 and all the connectors on the electronic control P C board 11 Pull out the electronic control P C board from the electrical box 12 Remove the ground wi...

Page 38: ...ceiver P C board holder and the holder See Photo 4 6 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 5 Removing the vertical vane motor unit 1 Remove the nozzle assembly Refer to 4 2 Remove the crank of the vertical vane motor unit from the arm of the vertical vane 3 Remove the screw of the vertical vane motor unit and pull the vertical vane motor unit 4 Remove the ...

Page 39: ...emove the screws fixing the motor bed See Photo 9 5 Loosen the screw fixing the line flow fan See Photo 10 6 Remove the motor bed together with fan motor and motor band 7 Release the hooks of the motor band Remove the motor band Pull out the indoor fan motor 8 Remove the indoor coil thermistor from the heat exchanger Install the indoor coil thermistor RT12 in its former posi tion when assembling i...

Page 40: ...C CO LTD Distributed in Nov 2008 No OBH497 REVISED EDITION C 5 Distributed in Apr 2008 No OBH497 REVISED EDITION B 7 Distributed in Mar 2008 No OBH497 REVISED EDITION A 7 Distributed in Jan 2008 No OBH497 7 Made in Japan New publication effective Nov 2008 Specifications subject to change without notice TM ...

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