User manual LG GR-409GUPA

[. . . ] Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REFRIGERANT CYCLE DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 9-2-1 ­ 37 ­ <Self-diagnosis by check codes> 1) The self-diagnosis by the check codes is conducted under the block displays of item B-H in Table 9-2-1. 2) Remote control key operation under the service mode is conducted by ON/OFF or TEMP . The remote control display by each key operation is varied as shown below. Two digit number is displayed in a hexadecimal number. 3) The self-diagnosis by the check codes is conducted with procedures shown below. a) Enter the service mode and make sure the off timer display of the remote control shows . "" b) Operate the "ON/OFF" key and make sure the timer lamp on the display section is blinking (5 Hz). c) At the same time, also make sure the operation lamp is also blinking. This shows that the protection circuit on the indoor P . C. key and make sure the remote control display shows " " and blinking of the operation lamp. If the operation lamp is blinking, it shows the protection circuits for connecting cable is working or thermal fuse is blown. key so that the display is increased one by one to continue checks by the self-diagnosis as shown in the next table. YES Does the power turn on by pushing the [START/STOP] button of the remote control?YES (No problem) Does the transmission indicator of remote control blink normally and transmit certainly?YES Replace the remote control. NO NO Remote control is defective. Does the fuse (F01) blow?Terminal) NO NO Is the indication voltage (DC12V or 5V) of main P. C. YES YES Parts (R21, R109, SG01, C15, C01, DB01, C02, IC01, T01) are defective. YES Wrong wiring of AC cord or connecting cable is defective. Replace the thermal fuse set. Is the voltage NO across C02 measured DC310V~340V?YES Shut off the power Is the secondary voltage of SW trans- NO supply once, and turn it on again after disformer (T01) measured connecting the motor DC35V, DC12V, connector CN10 . YES Is the secondary voltage of SW NO transformer measured DC35V, DC12V, and DC7V?YES Refer to the paragraph "Pre-check", or defective circuit before power P. C. board. * SW transformer (T01) or IC (IC01) for power supply is defective. Replace the main P. C. board. Motor is defective. * Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of damage of the motor. ­ 40 ­ 9-3-2. [. . . ] board assembly. ­ 62 ­ No. Part name Procedure 1) Perform the process , -1 above. 2) Remove the terminal cover of compressor. 3) Remove OL holder and pull overload relay up. 4) Disconnect the lead wire from the overload relay terminal. Remarks , -6 Overload relay Terminal cover OL holder Parts position Compressor (For unit D) Fan motor Compressor (For unit C) Lower unit 1) Perform the process ·, , above. [. . . ]