- 61 -
12-2 Check B
B1. LED blinks once, then repeats (FCT0 Fault)
- Purpose: Detecting motor current and voltage error
- Check voltage at point A (Motor Voltage), point B (Motor Current) and Point C (Capacitor
Voltage) when compressor is off.
- Spec: Points A, B, & C 2.5V
0.3V
Protection Logic
Blink
OFF Blink OFF
Y
N
Protection
logic
Check B
Blink 1 time
(FCT 0) Check B1
Out of spec?
(2.2 - 2.8V)
Reset Power
Replace Driver PCB
B2. LED blinks two times, then repeats (Stroke Trip)
Protection Logic
Blink
Blink OFF Blink Blink OFF
Y
Y
Y
Y
Protection
logic
Check B
Blink 2 times
(Stroke Trip) Check B2
Compressor
Doesn’t work
Y
N
Compressor
Works Intermittently
Capacitor
Spec.
Check C
Compressor
Damage
Check C
Replace
Capacitor
Replace
Compressor
N
N
Reset
Power
Stroke Trip
Occur?
Y
Repeat
Check Procedure
Harness
Connecting
Check C
Fix Harness
N
N
Cycle
Check E
Fix
Cycle
Replace
Driver PCB
OK
NG
- Purpose: Prevent abnormally long piston strokes.
- Case 1. If compressor doesn’t work and LED blinks - Cause: Possibly harness from compressor to PCB might be
defective.
- Case 2. If compressor works intermittently and LED blinks - Cause: Condenser Fan or Freezer Fan is not running. Sealed
system problem such as moisture restriction, restriction at capillary tube or refrigerant leak.
- Logic: Compressor is forced to off and then tries to restart after 1 minute.
GND
Voltage
C
A
B
Содержание LFX31915 Series
Страница 20: ... 20 5 CIRCUIT DIAGRAM ...
Страница 22: ... 22 7 PCB PICTURE 7 1 Main PCB P No MFG EBR75234702 2011 01 Picture CON2 CON3 CON1 CON5 CON6 CON7 ...
Страница 23: ... 23 7 2 Display PCB Sub PCB P No Display PCB EBR 729554 2011 03 Sub PCB EBR60070709 2011 01 Picture ...
Страница 86: ...P No MFL62188080 JUL 2013 Printed in Korea ...