Multi Type Room Air Conditioner SERVICE MANUAL MODEL: LM-1830C2L/M LM-1830H2L/M LM-2430C2L/M LM-2430H2L/M … Exploded View and Replacement Parts List … 3- Functions• Room temperature sensor. (THERMISTOR)• Maintains the room temperature in accordance with the Setting Temp.• Indoor fan is delayed for 5 seconds at the starting.• Restarting is inhibited for approx. 3 minutes.• High, Med, Low, Chaos— Lights up in operation— Lights up in Sleep Mode— Lights up in Timer Mode— Lights up …

Operation Details 1. MAIN UNIT FUNCTION • DISPLAY 1) C/O Model Operation Indicator • On while in appliance operation, off while in appliance pause • Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on) Sleep Timer Indicator • On while in sleep timer mode, off when sleep timer cancel or appliance operation pause Timer Indicator • On while in timer mode (on/off), off when timer mode is completed or canceled. Comp. Running Incidator • While in appliance operation, on while in outdoor unit compressor running, off while in compressor off 2) H/P Model Operation Indicator • On while in appliance operation, off while in appliance pause • Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on) Sleep Timer Indicator • On while in sleep timer mode, off when sleep timer cancel or appliance operation pause Timer Indicator • On while in timer mode (on/off), off when timer mode is completed or canceled Defrost Indicator • Off except when hot start during heating mode operation or while in defrost control * Cooling Mode Operation • When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop. • When it reaches 0.5°C above the setting temp, they start to operate again. Compressor ON Temp ? Setting Temp+0.5°C Compressor OFF Temp ?Setting Temp-0.5°C • While in compressor running, operating with the airflow speed set by the remote control. While in compressor not running, operating with the low airflow speed regardless of the setting. * Healthy Dehumidification Mode • When the dehumidification operation input by the remote control is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature. 26°C ?Intake Air Temp ? 25°C 24°C ?Intake Intake Air Temp<26°C ? Intake Air Temp-1°C 18°C ?Intake Intake Air Temp<24°C ? Intake Air Temp-0.5°C Intake Air Temp<18°C ? 18°C…. 1. Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Electronic Parts Troubleshooting Guide Turn off Main Power Turn on Main Power Does “beeping” sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK. Check the voltage of power(About AC 220V/AC240V, 60Hz) • Main power’s voltage • Voltage applied to the unit • Connecting method of Indoor/Outdoor connecting cable • Check Fuse (Outdoor PCB Ass’y) • Check Varistor ZNRØ1J(Outdoor PCB Ass’y) Check the connection housing for contacting • Connector related to CN-DC/AC • Display PWB Ass’y Check Check each load(Indoor/Outdoor Fan Motor, Compressor, Stepping Motor etc.) and contacting condition of related connector PCB Board Operation Check Items • Power Transformer (Outdoor unit) - Input Voltage - Output Voltage * • IC01D(7812) Output (Indoor/Outdoor unit) * • IC02D(7805) Output (Indoor/Outdoor unit) * • IC01A(KIA7036, Reset IC) X01(8MHz) • Replace Trans • Replace IC01D • Replace IC02D • Replace faulty parts - About AC220V/240V ± 10% - Check the power voltage - About AC14 ± 3V • DC + 12V • DC + 5V • Voltage of Micom No. 2, (DC +4.5V over) and Soldering condition. Content Remedy NO YES (After 10 seconds)

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