Samsung RF28HMEDBSR Service Manual page 64

TROUBLESHOOTING
※ R Self-diagnostics check list
LED
F R
or
Item
Display error when open error is detected
Flex Zone-Damper- by damper heater : separation of Damper
Heater Error Heater housing part, contact error,
disconnection, short circuit.
Display error when open error is detected
Ice Maker(FF) Function
by Heater : separation of Ice Pipe Heater
housing part, contact error, disconnection,
Error
short circuit.
Display error when the Ice Maker(FZ) kit
Ice Room-FAN Error operate moving ice over 3 times or it is
not leveled.
Main mycom ↔ Display "41-E" message
Display ↔ Main Mycom and make a buzzing sound when the
Communication Error communication between displays does
not work.
Display error when open error is detected
by ice duct heater : separation of Ice
Ice Duct Heater Error
Duct Heater housing part, contact error,
disconnection, short circuit.
Display error when open error is detected
I c e R o o m B u c k e t by ice room bucket heater : separation
Heater Error of Ice Room Bucket Heater housing part,
contact error, disconnection, short circuit.
Comp starting Failure
When the Compressor fails starting
Error
IPM Fault Error When there is a IPM Fault error
C o m p A b n o r m a l
When there is abnormal current detected
c u r r e n t D e t e c t i o n
at the Compressor
Error
Motor Locked Over When there is a Compressor restriction
RPM Error error
Comp under voltage
When there is a low voltage error
Error
Comp over voltage
When there is a over voltage error
Error
Trouble contents
F R
64
Diagnostic method
After separating MAIN PCB CN77 wire from
PCB, resistance value between Black ↔ Brown
wire shall be 135 ohm± 7%.
0 ohm : heater short, ∞ Ohm : wire / bimetal
Open.
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.
After separating MAIN PCB CN70 wire from
PCB, resistance value between CN70 Brown
↔ CN70 Gray shall be 63(230) ohm ± 7%.
(Resistance value is varied by input power) 0
ohm : heater short, ∞ ohm : wire/bimetal open
(Must power off)
After separating MAIN PCB CN79 wire from
PCB, resistance value between Yellow ↔ Pink
wire shall be 135 ohm± 7%.
0 ohm : heater short, ∞ Ohm : wire / bimetal
Open.
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]