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Revision A:
• 3. SPECIFICATION has been corrected.
Please void OBH497.
INDOOR UNIT
No. OBH497
REVISED EDITION-A
SERVICE MANUAL
Wireless type
Models
MSZ-FD09NA
MSZ-FD12NA
Outdoor unit service manual
MUZ-FD•NA Series (OBH498)
MXZ-A·NA Series (OB444)
CONTENTS
1. TECHNICAL CHANGES······································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. OUTLINES AND DIMENSIONS ························ 7
5. W
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Revision A: • 3. SPECIFICATION has been corrected. 2
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1 TECHNICAL CHANGES MSZ-FD09NA MSZ-FD12NA 1. New model. 3
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2 PART NAMES AND FUNCTIONS MSZ-FD09NA MSZ-FD12NA AREA lamp POWER lamp Remote control Operation indicator receiving section lamp Front panel Airfilter Air inlet Remote controller Platinum deodorizing filter Anti-allergy Enzyme Filter i-see Sensor Air outlet Emergency operation switch Fan Horizontal vane Heat exchanger AREA lamp indicates AREA setting i-see control operation In AREA setting, the horizontal air flow i-see Sensor constantly measure direction changes automatically floor/wall temp
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3 SPECIFICATION Indoor model MSZ-FD09NA MSZ-FD12NA Power supply V, phase, Hz 208/230 , 1 , 60 Max. fuse size (time delay)/ Disconnect switchA15 Min. circuit ampacity A 1.0 1.0 Fan motor F.L.A 0.76 HEAT Dry CFM 166 - 240 - 381 166 - 240 - 420 Airfl ow COOL Dry 162 - 226 - 339 162 - 226 - 381 Low - Med. - High CFM (Wet) (144 - 202 - 307) (144 - 202 - 350) Moisture removal pt./h 2.1 2.9 Cooling dB(A) 22 - 31 - 39 22 - 33 - 43 Sound level Low - Med. - High Heating dB(A) 22 - 31 - 40 22 - 33 - 43 Co
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3-1. OPERATING RANGE (1) POWER SUPPLY Rated voltage Guaranteed Voltage Min.187 V 208 V 230 V Max.253 V 208/230 V Indoor unit 1 phase 60 Hz (2) OPERATION Intake air temperature (°F) Mode Condition Indoor Outdoor DB WB DB WB Standard temperature 80 67 95 — Maximum temperature 90 73 115 — Cooling Minimum temperature 67 57 14 — Maximum humidity 78 % — Standard temperature 70 60 47 43 Heating Maximum temperature 80 67 75 65 Minimum temperature 70 60 14 13 3-2. OUTLET AIR SPEED AND COVERAGE RA
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4 OUTLINES AND DIMENSIONS Unit : inch MSZ-FD09NA MSZ-FD12NA 7/16 X 1 Oblong hole 7/16 X 13/16 Oblong hole 8-7/8 8-7/8 2-1/2 2-1/2 Installation plate 31-3/8 30-7/8 1/2 6-1/8 6-1/8 2-1/8 13-9/16 13 2-11/16 Indoor unit Wall hole ø2-9/16 Air in Installation plate 10-1/8 1/4 Piping 2-3/16 27-1/16 2-3/16 Drain hose 1-11/16 1-11/16 3-3/8 3-13/16 2-5/16 3/4 Air out Insulation ø1-3/8 O.D Liquid line ø1/4 19-11/16 (Flared connection ø1/4) Gas line ø3/8 16-15/16 (Flared connection ø3/8) Drain hose Insul
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5 WIRING DIAGRAM MSZ-FD09NA MSZ-FD12NA 8
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6 REFRIGERANT SYSTEM DIAGRAM Unit:inch MSZ-FD09NA MSZ-FD12NA Refrigerant pipe 3/8 (with heat insulator) Indoor coil Indoor thermistor heat RT12 (main) exchanger Flared connection Indoor coil thermistor RT13 (sub) Room temperature thermistor RT11 Flared connection Refrigerant pipe 1/4 (with heat insulator) Refrigerant flow in cooling Refrigerant flow in heating 9
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7 SERVICE FUNCTIONS MSZ-FD09NA MSZ-FD12NA 7-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board. The time will be shortened as follows. (Refer to 9-7.) Set time : 1-minute 1-second Set time : 3-minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS.) 7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION A maximum
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7-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO 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, i
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8 MICROPROCESSOR CONTROL MSZ-FD09NA MSZ-FD12NA WIRELESS REMOTE CONTROLLER Signal transmitting section Operation display section VANE CONTROL button OPERATE/STOP FAN SPEED CONTROL button (ON/OFF) button OFF TIMER button OPERATION SELECT button ON TIMER button POWERFUL button TIME SET buttons Temperature buttons FORWARD button BACKWARD button WIDE VANE button i-see button (Vertical vane button) AREA button CLOCK SET button RESET button Indication of remote controller model is on back NOTE: Last
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8-1. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. POWER lamp of the indoor unit turns on with a beep tone. (2) Select COOL 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. Coil frost prevention The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting. When the temperature of
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8-4. AUTO CHANGE OVER ··· AUTO MODE OPERATION Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation. Mode selection (1) Initial mode When unit starts the operation with AUTO operation from off; • If the room temperature is higher than the set temperature, operation starts in COOL mode. • If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode. (2) Mode change COOL mode changes to HEAT mode when abo
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(3) Positioning To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the selected angle. Confirming of standard position is performed in the following cases: (a) The operation starts or finishes (including timer operation). (b) The test run operation starts. (c) Standby mode (only during multi system operation) starts or finishes. (4) VANE AUTO ( ) mode The microprocessor automatically determines the vane angle to make the optimum room tem
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(10) POWERFUL ( ) operation. The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode. The POWERFUL mode is automatically released 15 minutes after operation starts, and the operation mode returns to the mode prior to POWERFUL operation 2. Vertical vane (1) Vane motor drive These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx.
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8-6. i-see CONTROL OPERATION The sensors constantly measure the room and floor/wall temperatures to automatically adjust to the set temperature by esti- mating the temperature actually perceived by a person inside the room (“sensory temperature”). Advantages · The air inside the room is conditioned quickly to a comfortable condition. · The room will not become too cold or hot even when the air conditioner is kept on for a long period. · The air conditioner will not overcool or overheat, which me
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Indoor unit installation location and air-conditioning area Installed at left Installed at center Installed at right LEFT RIGHT LEFT RIGHT LEFT RIGHT ·Be sure to set the slide switch inside the remote controller to an appropriate position in accordance with the installed position of the indoor unit. If the switch is not set correctly, the air conditioner may not function properly. (Refer to "Remote controller in SERVICE FUNCTIONS".) To air-condition mainly To air-condition the entire room To air
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Operation and operating range i-see sensor moves 30 degrees from the center in both right and left side. i-see Sensor turning to the center i-see Sensor turning to the right i-see Sensor turning to the left i-see Sensor operates as follows in accordance with AREA setting made with the remote controller. “AUTO” in AREA setting; first turning to the LEFT for adjusting the position then ····· CENTER RIGHT CENTER LEFT CENTER ····· (The sensor turns to
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8-8. TIMER OPERATION 1. How to set the time (1) Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially “0:00 AM” blinks at the current time dis- play of TIME MONITOR, so set the current time correctly with CLOCK SET button. How to set the current time (a) Press the CLOCK set button. (b) Press the TIME SET buttons ( and ) to set the current time. • Each time FORWARD button ( ) is pressed, the set time increases by 1 minu
