Samsung EH035CAV Service Manual page 130

12-2-3 The Outdoor unit Fan error (only UH035CAV)
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?
Is the Pin voltage of CN01 #3, #5
within 1~5V during the operation?
Is the Pin voltage of CN01 #3, #6 changed
during the operation? (Square-Wave)
Exchange the PCB.
Samsung Electronics
141 Kinderkamack Rd, Park Ridge, NJ 07656 Tel: 201-782-1782 Fax: 201-782-1783 Web: www.amgair.com Email: info@amgair.com
No
outdoor unit power supply error check.
Yes
No
Yes
No
execute the following step after 30 seconds.
Yes
Air Marketing Group LLC
Follow the Check Procedure of
Does the Pin voltage of IC01 (MICOM)
No.13 change? (Square-Wave)
Yes
FAN DRIVE CIRCUIT
(Q901,Q902 etc.) error
Exchange the PCB.
Pull out the power cord and
Disassemble the BLDC FAN Wire.
Is the short between
the BLDC FAN Wires?
Yes
Exchange the BLDC FAN MOTOR.
Troubleshooting
No
Exchange the PCB.
MICOM Error
No
Exchange the PCB.
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