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TROUBLESHOOTING
- The refrigerator of this model has BLDC FAN motor. BLDC motor is driven by DC 7~12V.
- On the normal condition of COMP ON, it operates together with F-FAN motor.
If door is opened and closed once at a high ambient temperature, it will be operated after 1 minute
delay.
Therefore, you are advised not to taken it for an error.
-. If there is a trouble, you should select the self-diagnostic function to check the trouble before power off.
4-2-2. If FAN does not operate(F, R, C - FAN)
Start
Is COMPRESSOR ON ?
Door & MICOM State
Door
F FAN pulse voltage
CN76#7(Brown)
The voltage measured around 2~3V
with multi-meter though the voltage is
very weak because of pulse signal
Display for checking the self-diagnostic function
R FAN ERROR
Typical PCB Ground
REG1 Heater Sink
F
MICOM
(#83)
Close
Open
5V(High)
0V(Low)
0V(Low)
5V(High)
R MICOM(#82)
Right and Left
Excute manualoperation.
If initial temperature of F Room
is under the 41
(5
), waitng
7 minutes and then activate.
FAN work normally
Repair the connection
of Door switch
Replace MAIN PCB
1) F-FAN 2) R-FAN 3) C-FAN
Typical PCB Ground
REG1 Heater Sink
Power on with about 7
minutes delay after power
OFF. (For preventing the
over load of compressor)
Expected causes
Check that if FAN-MOTOR has failure
itself.
Check that if wiring connection has bad
contact.
Check the input of the fan motor rotation
pulse when motor fan operates.
CN76-7(F),8(R),9(C)will generate the pulse signal when motor rotates.
These signals will be inputted into MICOM.
Unless signals are not inputted during motor operating, will be ON 10
seconds after fan Off. But if signals are not still entered, the above operation
will restart four times more.
If signals are not entered continuously, the motor will be restarted after 10
seconds.
This function is effective when the normal operation of motor would be
restrained by foreign matters such as ice.
Checking method of R,F,C FAN Motor voltage
The voltage between PCB typical Ground REG1 Heater Sink and
F FAN ; CN76#3(Yellow) shall be less than DC 7~12V.
R FAN ; CN76#4(Orange) shall be less than DC 7~12V.
C FAN ; CN76#5(Sky-blue) shall be less than DC 7~12V.
- Motor rpm could be changed by capability without previous.
Is the voltage between MAIN
PCB REG1 Heater Sink and CN76#3
(Yellow) around DC7~12V?
Is the voltage between MAIN
PCB REG1,Heater Sink and CN76#4
(Orange) around DC7~12V?
Is the voltage between MAIN
PCB REG1, HEAT SINK and
CN76#5(Sky -blue) around DC7~12V?
Is the external temperature above
66.2 (19 )?
Recheck after 7 minutes
(Time could be delayed
depending on the
temperatures. If the
temperature is lower, It
may not operate : about
59 (below 15)
Is the voltage between MAIN
PCB REG1,Heater Sink and
CN30#2 (Purple) around 0V?
Is the voltage between MAIN
PCB REG1 Heater Sink and CN30#1
(Black) around 4.5~5V?
Does DC7~12V alternate with
below DC 2V between MAIN PCB REG1
Heater Sink and CN76 #3(Yellow)
Does DC7~12V alternate with below
DC 2V between MAIN PCB REG1 Heater
Sink and CN76#4(Orange)
Does DC7~12V alternate with below
DC 2V between MAIN PCB REG1 Heater
Sink and CN76#5(Sky-blue)
In initial power to appliance, the compressor
and fans of fresh food/ freezer, compressor
fan operate. If freezer temperature is
sensed of 41by momentary power
failure, fans will operate after 5 minutes.
Reference
F FAN ERROR
C FAN ERROR