Samsung RFG298HD Service Manual page 54

TROUBlESHOOTING
※ RSelf-diagnosticschecklist
LED
F R
FF-DEF Error
Ice Maker(FF)
Function Error
Ice Room-
FAN Error
Panel ↔ Main
Communication Error
Comp starting Failure
IPM Fanlt
Comp Abnormal
current Detection
Motor Locked Over
RPM
Comp under voltage
Comp over voltage
Trouble contents
Item
Separation of fresh food compartment
defrost heater housing part, contact
error, disconnection, short circuit or
temperature fuse error. Display error :
the defrosting does not finish though
fresh food compartment defrost is
heating continuously for more than 80
minutes.
Display error when open error is
detected by Heater : separation of
Ice Pipe Heater housing part,
contact error, disconnection, short
circuit.
Display error during operation of
applicable fan motor : Feed back
signal line contact error rnotor wire
separation motor error.
Display pc - Er in the panel with
alarm : MICOM MAIN ↔ PANEL
communication error.
When the Compressor fails
starting
When there is a IPM Fault error
When ther is abnormal crrunt
detected at the Compressor
When there is a Compressor
restriction error
When there is a low voltage error
When there is a over voltage error
F
53
Diagnostic method
After separating MAIN PCB CN70
wire from PCB, resistance value
between CN70 White ↔ CN70 Gray
shall be 120(440) ohm±7%.
(Resistanc e value is varied by input
power) 0 ohm : heater short, ∞ ohm
: wire/bimetal open (Must power off)
After changing the Ice Maker(R),
plug the refrigerator power code
again, and check the operation.
The voltage of MAIN PCB CN76-
"2"(Black) ↔ CN76-"1" (Gray): shall
be between 7V~12V
Actually, If there is not a problem, it is
desirable to replace Main and Panel
PCB With the oscilloscope after a
cable problem confirming.
Check if there is a short between
compressor terminals. Check IPM
Voltage [Under 13.5V] Check if there
is a short between IPM Pins [#1~33]
Check the Compressor and the
Cycle
Check the Compressor connections
Check the voltage of Resistance of R308
[0.09Ohm] Check the Compressor and the Cycle
Check the voltage of Resistance of R308 [Short/Open]
Check the voltage of both of C103 terminals [Unstable
Voltage] Check the Compressor and the Cycle
Check the voltage of Resistance of
R513 [Short/Open]
Check the voltage of Resistance of
R501, R505, R509 [Short/Open]
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