ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT AQT12WHWE UQT12WHWE AQT12WHWB UQT12WHWB SERVICE Manual AIR CONDITIONER CONTENTS 1. Product Specifications 2. Disassembly and Reassembly 3. Refrigerating Cycle Diagram 4. Set Up Model Option 5. Troubleshooting 6. Exploded Views and Parts List 7.
2) Open the Front Grille by pulling right and left sides of the hook. 3) Loosen 1 of the right screw and detach the Terminal Cover. 4) Detach the thermistor from the Front Grille. 5) Loosen 2 fixing screws of Front Grille. Samsung Electronics...
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1) Take all the connector of PCB upper side (Main PCB) out. (Inclusion Power Cord) 2) Detach the outdoor unit connection wire from the Terminal Block. 3) Loosen 4 fixing screws of Ass'y Control-In. Tray Drain 1) Pull Tray Drain out from the Back Body. Samsung Electronics...
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1) Loosen the fixing screw and detach the Fan Motor & Motor Holder. Cross Fan 2) Detach the Fan Motor from the Fan. 3) Detach the Fan From the left Holder Bearing. Samsung Electronics...
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Cabinet-Side edge and a fixing screw on the Cabinet-Front lower to detach the Cabinet-Front. 2) Loosen 2 fixing screws of the Ass'y-Control. 3) Loosen 6 fixing screws of the Cabinet-Side 4) Loosen 2 fixing screws of the Cabinet-Side Samsung Electronics...
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3) Disassemble the pipe in both inlet and outlet of the Compressor with welding torch. 4) Disassemble the pipe in both inlet and outlet of the Condenser with welding torch. 5) Loosen the 3 bolts at the bottom. 6) Detach the Compressor. Samsung Electronics...
Every time you push the button, the display panel reads . . . repeatedly. Setting Option SEG4. Push the button to set the display panel to Every time you push the button, the display panel reads . . . repeatedly. Samsung Electronics...
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Every time you push the button, the display panel reads . . . repeatedly. Setting Option SEG10. Push the button to set the display panel to Every time you push the button, the display panel reads . . . repeatedly. Samsung Electronics...
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If all lamps of indoor unit are flickering, Plug out, plug in power plug again and press ON/OFF key to retry. If the unit is not working properly or all lamps are continuously flickering after setting the option code, see if the correct option code is set up for its model. Samsung Electronics...
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4-2 Table of the option Code Option Code Model SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 AQT12WHWB AQT12WHWE Samsung Electronics...
The compressor stops intermittently or the fan speed of the The compressor stops intermittently in a COOL mode or indoor unit decreases to prevent inside/outside air frozen DRY mode, and fan speed of the indoor unit decreases. depending on the inside/outside air temperature. Samsung Electronics...
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Problem with the outdoor unit or PCB outdoor unit remote control. • In 3 minutes, check the voltage No power source Problem with the relay (RY71) or PCB between the indoor unit terminal displayed. block N(1) and 1. Samsung Electronics...
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Check whether the fuse on the Replace fuse control board is normal. F701: 3.15[A]/250[V] Check the output of SMPS on the control board. Input power: AC230±15%[V] Replace the control board IC02 Input: DC 12[V] IC02 output: DC 5[V] Check the setting temperature Samsung Electronics...
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Test rod location Normal Voltage PCB CN72 Condition About AC pin #3 and #5 Fan operate 180V Replace Motor Motor Fan-Capacitor is out of order Fan-Capacitor Fan motor Fan motor is out of order. should be replaced. Samsung Electronics...
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Is rating voltage ±10% range applied relay between Power relay is Power relay should be Terminal block No. N(1) and No. 1 out of order replaced. Outdoor unit is out of order. Is the room sensor normal register? 10°C 20°C 30°C 17.96kΩ 12.09kΩ 8.3kΩ Samsung Electronics...
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Voltage at pin #57~#60 Micom (IC04) is faulty. of micom (IC04) change? (Squarewave) Voltage at pin #16 of IC06(ULN2003A) and #10~#12 of Driver IC06/08 (ULN2003A) is faulty. IC08(ULN2003A) change? (Squarewave) UP/DOWN louver motor is faulty. Samsung Electronics...
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Is the voltage between Abnormal IC05 CN71 #1 and CN71 #5 rating voltage ±10% range Abnormal 4-Way valve of Outdoor Unit. Abnormal RY73 or connecting Cable PCB should be replaced. 4-Way valve should be replaced or connecting Cable Check. Samsung Electronics...
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SENSOR Resistance Value : 40˚C-5.83kΩ Connect the sensor to CN43, supply power, and measure the voltage of #1 and #2 of the CN43 connector. Poor ASS'Y PCB Replace Below 0.5V? Poor ASS'Y PCB Replace Over 4.9V? MICOM Error or Connector(CN43) check Samsung Electronics...
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When the voltage descends below 3V, the assembly module PCB is normal and the main PCB is poor. Then replace the main PCB. 3. Replace the assembly display PCB because the module PCB is poor if the voltage between No. 2~3 of CN91 maintains 5V after the remote control starts operation. Samsung Electronics...
2) The fan motor of the indoor unit doesn't run. • Fan Motor Connector(CN72) is faulty 3) The power voltage between terminal #3 and #5 • ASS'Y Main PCB is faulty • Connection is faulty of the connector(CN72) is 0V. Samsung Electronics...
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32.430 3.537 6.941 14.680 33.890 3.652 7.192 15.280 35.430 3.772 7.455 15.900 37.050 3.897 7.729 16.550 38.760 4.026 8.015 17.240 40.560 4.161 8.313 17.960 Temperature Sensor Characteristic Curve Temperature (˚C) At the temperature of 25˚C(10KΩ) Resistance Value (Kohm) Samsung Electronics...
∞, 0Ω . . . Open or Short Abnormal Stepping Motor Measure the resistance between the red wire and each terminal wire with a tester. Normal About 300Ω at the normal temperature (20˚C ~ 30˚C) ∞, 0Ω . . . Open or Short Abnormal Samsung Electronics...
6. Exploded Views and Parts List 6-1 Indoor Unit 3-8-1 You can search for the updated part code number through the ITSELF. URL : http://itself.sec.samsung.co.kr Samsung Electronics...
• STEPPING MOTOR DRIVE (H/M/L) PART • BUZZER DRIVE • FUNCTION DRIVE* BLADE-H STEPPING MOTOR MOVING SELECT -Blade -Auto grille* ON, OFF TIMER SELECT DC 5V TEMPERATURE SELECT VOLTAGE REGULATOR SLEEP SELECT DC 12V SMPS Power Block FUNCTION* SELECT AC INPUT Samsung Electronics...
8. Wiring Diagram 8-1 Indoor Unit Code No : DB98-15139A This Document can not be used without Samsung's authorization. Samsung Electronics...
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8-2 Outdoor Unit MOTOR CAPACITOR FAN MOTOR COMP CAPACITOR O.L.P OVER LOAD PROTECTOR Code No : DB98-15607A This Document can not be used without Samsung's authorization. Samsung Electronics...