LG LFX28995 Series Service Manual

9-7 Poor cooling in Freezer compartment No 1 Checking flow Check the F Sensor resistance 2 Reset the unit and Input Test 1 Mode. (Push the button 1 time) 3 Open the freezer door and Check the air flow. The F Sensor is determined by the temperature. For example, 23 indicate -4°F. Result & SVC Action Temperature -22°F / -30°C -13°F / -25°C -4°F / -20°C 5°F / -15°C 14°F / -10°C 23°F / -5°C 32°F / 0°C Result 40 30 23 17 13 10 8 Status Windy No windy SVC Action Go to the 4 Check the F Fan motor 4 Check the air temperature. Cold or not ? Status Cold Not cold SVC Action Explain ...

B5. LED blinks seven times, then repeats (IPM Fault: A & E Inverters) Protection Logic Blink Blink Blink Blink Blink Blink Blink OFF Protection logic Check B Blink 7 times (Lock Piston Trip) Check B5 Compressor Doesn’t work Y N Repeat Check Procedure Replace Drive PCB N Y Check IPM visual inspection (turn off) Short Test Point A Power Reset Compressor Damage Check C3 Replace Compressor NG Y Modify - Purpose: Prevent high current due to IPM Short - Cause: Damaged IPM (Dead Short) - Test for a dead short at Point A with a VOM. - Logic: Compressor is forced off and tries to restart in 20 ...

SVC action Explain to customer Go to the 3 Result Normal operation False operation 8-11 Screen Malfunction Error (LCD Display) No 1 2 Checking flow Check the switch connection. Check the switch Result & SVC Action SVC action Explain to customer Change the Main PCB Result Normal operation False operation 3 Repeat the on / off button ...

LED two - time repetiton (Stroke Trip) on - on - off - on - on - off - on - on - off repeating PCB Parts defect or Compress or Connector miss connecting (Piston over run) 1. Please check, Whether connector of compressor is attached rightly or not. after power off 2. After the first action, You check on normal operation of compressor. 3. If the same symptom arises after the second action, replace PCB Piston constraint 1. After resetting power, check if it is running normal 2. If the same symptom arises after the first action 3. If the same symptom arises after the second action, replac ...

12-1 Check A - There is PC Board located in the PCB case. The control driver is PC board for the compressor. - This step shows the source voltage of the driver PC board. * Driver PCB located in machine room. Step1. Open PCB Cover Step2. Check Driver PCB ...

8-9 Communication Error (Er CO) No 1 2 Checking flow Check the loose connection. Check the Red to White/Red. Result & SVC Action Result 12 V Other SVC Action Go to the 3 Check the Hinge (loose connection) Change the Main PCB 5 Check the White/Red to Orange. 6 Check the White/Red to White/Black. 3 Check the Orange to White/Red. Result 0 or 5 V Other SVC Action Change the Display PCB Go to the 4 4 Check the White/Black to White/Red. Result 0 or 5 V Other SVC Action Change the Main PCB Go to the 5 Result 0 or 5 V Other SVC Action Change the Display PCB Go to the 6 Result 0 or 5 V ...

12-6-2 SEALED SYSTEM DIAGNOSIS “Not Cooling” Complaint All components operating, No airflow problems, Not frosted up as a defrost problem problem has been isolated to sealed system area Frost Pattern? Partial Equalization Test Very Slow None Equalization Test Very Fast Fast Very Fast Inefficient Compressor Partial Restriction Complete Restriction Condenser Temperature Cap Tube Sound Yes No Air/Low Side Leak Loss of Change Very Slow Faint Hotter than Normal None to Weak Room Temperature Compressor Not Pumping Trace of Oil Undercharge (The equalization test is trying to restart a comp ...