The Outdoor Unit Fan Error; Samsung Electronics - Samsung AQ09VFUAGM/CV Service Manual

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The Outdoor unit Fan error

1. Checklist:
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?
2. Troubleshooting procedure
Is the connection of FAN housing certainly to
PCB socket?(CN40, CN41)
Take off each Fan motor housing after 1 minutes
from turning off the power
Is each resistance of FAN cable housing
pin #1-#3 over 1Mohm, pin #4-#3, #5-#3 and
#6-#3 over 1Kohm on each FAN motor?
Mount each Fan housing to PCB socket and
turn on the power
Is the Pin voltage #1 - #3 of CN40 and 41
over 250V?
Is the Pin voltage #5 - #3 of CN40 and 41 15V?
Is the Pin voltage #5 - #3 of CN40 and 41
within 1-6V during the operation?
Is the Fan in rotation during
TEST operation in cooling mode
Is the Pin voltage #6 - #3 of CN40 and 41
changed high(4-5V) and low(0-1V) in case of
making manual rotation slowly?
Is the Pin voltage #7 - #3 of CN40 and
41 low(0-1V) in normal rotation?
12-35
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Check the connection of CN40 and CN41
Exchange the FAN motor because of driver
inside of the motor case broken
Follow the check procedure of
outdoor unit power supply error check
Exchange INVERTER PCB
Exchange INVERTER PCB
Exchange the FAN motor not in rotation
Exchange INVERTER PCB
Exchange the FAN motor
Exchange INVERTER PCB
# TEST operation #
press K900 button on the
MAIN PCB after power on.
- once : cooling mode
- twice in a second :
heating mode

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