The Outdoor Unit Fan Error - Samsung AC052FBMDEH/EU Service Manual

4-5-3 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 41over 250V?
Is the Pin voltage #5 - #3 of CN40 and 41 15V?
Is the Pin voltage #5 - #3 of CN40 and 41within 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 41changed
high(4-5V) and low(0-1V) in case ofmaking manual
rotation slowly?
Is the Pin voltage #7 - #3 of CN40 and 41 low(0-1V) in
normal rotation?
Samsung Electronics
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Check AC power source. Reconnect wires correctly
Exchange the FAN motor because of driver inside
No
of the motor case broken
Follow the check procedure of outdoor unit power
No
supply error check
No
Exchange INVERTER PCB
No
Exchange INVERTER PCB
No
Exchange the FAN motor not in rotation
Yes
Exchange INVERTER PCB
No
Exchange the FAN motor
Exchange the FAN motor
# TEST operation #
press K900 button on the
MAIN PCB after power on.
- once : cooling mode
- twice in a second : heating mode
4-12