12-2 Check B
B1. LED blinks once, then repeats (FCT0 Fault:A-Inverter)
Protection Logic
Blink OFF Blink OFF
- 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
:" GND
0 Voltage
i
Protection
logic
Check B
b[ Blink I time
(FCT 0) Check B1
Replace Driver PCB ]
B2. LED blinks two times, then repeats (Stroke Trip: A & E Inverters)
Protection Logic
Blink Blink OFF Blink Blink OFF
- 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.
[ Protection I _1 Blink 2 times I
logic
Check B FI (Stroke Trip)Check B2 I N _.[
L_J _ ' J/ i
Driver PCB N .._ompressor_Y
I Check Procedure ]
Fix Harness I
Replace ]
Capacitor
.,, _ _ Compressor ,_,, N_j
"_ Damage _ Replace
,_ ,,- _ Compressor
,, _, Check C ,- _
1
- 54 -
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