Samsung AQV12NSA Service Manual page 59

Troubleshooting
12-2-4 The Outdoor unit Fan error
1. Checklist :
1) Are the input power voltage and the power connection correct?
2) Is the motor wire connected to the outdoor PCB correctly?
3) Is there no assembly error or none-assembly in the terminal of motor wire connector?
4) Is there no obstacle at the surrounding of motor and propeller?
2. Troubleshooting procedure
Is the Pin voltage of CN01
#1, #3 over 250V?
Yes
Is the Pin voltage of CN01 #3, #5
within 1V~5V during the operation?
Yes
Is the Pin voltage of CN01 #6 changed
during the operation?(Square-Wave)
Yes
Exchange the PCB.
12-5
All manuals and user guides at all-guides.com
No
Follow the Check Procedure of
outdoor unit power supply error check.
No
Does the Pin voltage of IC01(MICOM)
No.13 change?(Square-Wave)
No
Pull out the power cord and
execute the following step after 30 seconds.
Disassemble the BLDC FAN Wire.
Exchange the BLDC FAN MOTOR.
Yes
FAN DRIVE CIRCUIT
(Q901,Q902 etc.) error
Exchange the PCB.
No
Is the short between
the BLDC FAN Wires?
Yes
No
Exchange the PCB.
MICOM Error
Exchange the PCB.
Samsung Electronics