LG GR-J303TS Service Manual - Page 12

3-1-13. FAILURE DIAGNOSIS FUNCTION (1) Failure Mode 1. Failure diagnosis function is intended in order that service is easily done when failure to affect performance of the product during use occurs. 2. Function is neither done, nor buzzer sound rings even when pressing the button in occurrence of failure. 3. The product returns to normal operation if failure is released during display of failure code in occurrence of failure (RESET). 4. LEDs other than failure code turn off in occurrence of failure. BEST MODEL (GR-J303TG) BETTER MODEL (GR-J303TS) NO Item 1 Failure of upper compartment (K1) sensor Failure Display (Food LED) F1 F2 F3 F4 F5 FS Failures Upper compartment sensor is disconnected or shorted Remarks 2 Failure of middle Middle compartment sensor is compartment (K2) US disconnected or shorted sensor 3 Failure of lower Lower compartment sensor is disconnected compartment (K3) LS or shorted sensor * Check wiring of respective relevant sensor. 4 Failure of upper Upper compartment defrosting sensor is compartment d1 disconnected or shorted defrosting sensor 5 Failure of middle compartment defrosting sensor Middle compartment defrosting sensor is d2 disconnected or shorted 6 sensor Failure of ambient temperature sensor Note 1) Ambient temperature sensor is disconnected or shorted 7 Failure of single motor damper When ON/OFF of the reed-S/W is not Damper motor damaged, dP dectected even when driving the single frozen, coil damaged, driving motor damper for 2 minutes IC(photo coupler) failure 8 Poor defrosting at upper compartment H1 When defrosting sensor at the upper compartment Short of temperature fuse, does not reach to more than 7°C even when two short of heater, clogging of hours have passed after starting defrost drain, poor heater driving relay 9 Poor defrosting at middle compartment H2 When defrost sensor at the middle compartment Short of temperature fuse, does not reach to more than 16°C even when short of heater, clogging of two hours have passed after starting defrost drain, poor heater driving relay 10 Poor communication CO When no communication is consecutively done for 30 seconds Taking out of connector, Poor TR on communication part Note 1) All LEDs except for failure display LED (F1, F2, F3, F4, F5) turn on if simultaneously pressing both upper "Store" button and middle "Store" button for a second where poor ambient temperature sensor exists. - 12 -