Troubleshooting
Samsung Electronics
81
Yes
Yes
Yes
4-7
Troubleshooting
4-6-4 Fan error (E458, E475)
1. Check items
2. Check procedure
Yes
No
Yes
No
Yes
No
No
FAN 1 error(E458), FAN 2 error(E475)
1) Are the input power voltage and power connection correct?
2) Is the motor wire connected to the outdoor PCB correctly?
3) Is there no obstacle at the surrounding of motor and propeller?
4) Does the driver in the motor case broken?
Is the connection of FAN housing certainly to
PCB socket?(CN90, CN91)
Check the connection of CN90 and CN91
Take each Fan motor housing after 1 minutes
from turning the power
Exchange the FAN motor because of driver
inside of the motor case broken
Is each resistance of FAN cable housing normal?(*)
(*)Resistance of FAN cable housing at the normal temperature(10˚C~30˚C)
wire
pin number
Resistance
Remark
RED - BLACK
1-3
over 1MΩ
+300V motor power
WHITE - BLACK
4-3
1KΩ ~ 2KΩ
+15V control power
YELLOW - BLACK
5-3
200KΩ ~ 300KΩ
control
BLUE - BLACK
6-3
10KΩ ~ 50KΩ
pulse
ORANGE - BLACK
7-3
10KΩ ~ 50KΩ
reverse
Mount each Fan housing to PCB socket and
turn on the power
Follow the check procedure of
outdoor unit power supply error check
Is the Pin voltage #1 - #3 of CN90 and 91
over 250V?
No
Exchange INVERTER PCB
Is the Pin voltage #5 - #3 of CN90 and 91 15V?
No
Exchange INVERTER PCB
Is the Pin voltage #5 - #3 of CN90 and 91
within 1-6V during the operation?
Exchange the FAN motor not in rotation
Is the Fan in rotation during
TEST operation in cooling mode
Cont.
# TEST operation #
press K1 or K2 button on the
MAIN PCB after power on.
4-6-4
