LG GR-J303TS Service Manual - Page 10

3-1-7. FRONT-C HEATER CONTROL 1. A heater for prevention of dewing is installed on the FRONT-C part between the middle compartment and the lower compartment, and turns on at the time of COMP ON and for 20 minutes after COMP OFF. 2. It turns off in the test mode (turn on after power off for normal operation). 3-1-8. BUZZER RINGING 1. "Ding~Dong~" sound rings when pressing the front display button. 2. No buzzer rings if pressing the button not according to the operation order. 3-1-9. POWER FAILURE COMPENSATION FUNCTION 1. Previous operation is performs even applying power again after power failure. However, error status or test mode status is excluded. 3-1-10. OPERATION RESPOND TO AMBIENT TEMPERATURE 1. This is function of maintaining keeping temperature constantly irrespective of season by compensating for the inrefrigerator temperature through ambient temperature of the refrigerator to prevent that the in-refrigerator temperature changes according to ambient temperature (weak cold in winter, excess cold in summer). Keeping Temperature (based on "Mid") 4.0 °C -0.5 °C -1.5 °C Season Spring Operation Respond to Ambient Temperature In General Operation Summer Fall Winter 3-1-11. DEFROSTING (REMOVAL OF FROST) 1. Defrosting is simultaneously performed by using the defrosting heater at the upper compartment and the middle compartment whenever sum of compressor operation time reaches to 6 hours. 2. Defrosting is started if sum of compressor operation time reaches to 4 hours in input of initial power (or in returning from power failure). 3. Complete defrosting function where defrosting sensor temperature of each room reaches to 7°C (16°C for GR-J213) for the upper compartment, 16°C for the middle compartment respectively, after starting defrost work. However, poor defrost is indicated if not reaching to 7°C (16°C for GR-J213) for the upper compartment, 16°C for the middle compartment respectively 2 hours after starting defrost (See 3-1-11 Failure Diagnosis Function). 4. Poor defrost is indicated if the defrosting sensor is poor, and defrosting of the relevant room is not done. - 10 -