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11-2 Check B
Measures depending on the trip and the number of LED blinks
BlinkOFF BlinkOFF
B1. LED blinks once with FCT0 trip (FCT0 fault).
Purpose: To determine failure in motor voltage and current detection
When th e compressor connection is unstable (approx. for 25 -28 seconds after th e power is turn ed on),
check the voltage values of point A (motor voltage), point B (motor voltage) and Point C (motor current).
Spec: Points A, B, & C 2.5V ±0.3V
Logic: Restart every 30 seconds after
the compressor is turn ed off.
Check the
protection
logic
Check for FCT0 or
if the LED
blinks once
(FCT0 fault)
Does the voltage deviate
from the spec.?
(2.2 –2.8V)
Replace
the PCB
Y
Reset the power
N
GND
Voltage
Rec
ord
Be careful not to short the circuit to a near
by element when checking the C point voltage.
Protection Logic
GND
CA
B
Measures depending on the trip and the number of LED blinks
Y
Y
Protection Logic
B2. LED blinks twice with stroke strip (stroke trip).
BlinkOFF BlinkOFFBlinkBlink
Purpose: To prevent the piston from colliding with nearby objects due to an abnormally large stroke.
Case 1. When th e compressor does not operate: Failure in harness connection between PCB and compressor.
Case 2. When the compressor operates intermittently: System failure such as faulty condenser fan or freezer fan,
clogging due to moisture, capillary tu be clogging, and coolant leakage
Logic: Restart every 1 minute after th e compressor is tu rned off.
Check the
protection
logic
Check for stroke trip or
if LED blinks twice
(stroke trip)
Comp. does not
operate
Y
N
Is the comp. OK?
Replace the
compressor
N
Reset the
power
Does the stroke trip
occur?
Check for leakage
and the cycle
Y
Recheck the
inspection
procedure
Check the harness
connection
Repair harness
N
N
Rec
ord
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