LG DH504ELY6 Service Manual - Page 21

4. TROUBLESHOOTING GUIDE CONDITION 1. Dehumidifier does not start. (Both compressor and fan motor do not operate.) No power CAUSE Poor plug contact at outlet. Bucket is full. Humidity control is at Off position Wire disconnected or loose Capacitor. (Discharge capacitor before testing.) 2. Motor runs but compressor does not run. Voltage (115V ± 10%) Wiring Rotary switch Defrost control 3. Does not defrost control. 4. Insufficient dehumidification Capacitor (Discharge capacitor before servicing.) Compressor Overload protector (OLP) Defrost control is defective. Low relative humidity Poor air circulation H/E clogged with dust and dirt Air filter is dirty. Motor is not operating. -21- REMEDY Check power supply at outlet. Correct if none. Install plug properly or replace it. If Auto Shut Off lights, empty the bucket and replace properly. Turn the humidity control switch toward Max. Connect wire. Refer to wiring diagram for terminal identification. Repair or replace loose terminal. Test capacitor. Replace if not within ±10% of manufacturer's rating. Replace if shorted, open, or damaged. It must be between 103.5V and 126.5V. If not within limits, call an electrician Check the wire connections; If loose, repair or replace the terminal. If the wires are disconnected, refer to wiring diagram for identification, and replace the wires. Check the wire connections; If not according to the wiring diagram, correct the connections. Check for continuity, refer to the wiring diagram for terminal identification. Replace the switch if the circuit is open. The Defrost Control senses frost build-up on the evaporator coil and automatically shuts off the compressor. The fan continues to run, drawing air across the coil, and melting the frost. When the coil is defrosted, the compressor automatically restarts, and dehumidifying resumes. Check the capacitor. Replace if not within ±10% of manufacturer's rating. Replace if shorted, open, or damaged. Check the compressor for open circuit or ground. If open or grounded, replace the compressor. Check the compressor OLP if externally mounted. Replace if open. (If the compressor temperature is high, remove OLP, cool, and retest.) Check defrost control, replace it. Turn dehumidifier off. Move dehumidifier to obtain free and unobstructed air circulation. Clean evaporator and/or condenser assembly Clean it. Check Motor, repair or replace it.