Samsung AC052MN4DKH Service Manual page 60

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Check the power parts.
(Switch off power to the Terminal Box
before inspection!)
1. Is there a fault with a fuse? (Short-Normal, Open-Fault)
2. When the bridge diode is measured with "+ / -" (output voltage),
does the voltage exceed 290Vdc?
3. Is the power supply voltage 12V?
4. Is there a fault with a fuse of EMI PCB?
(Short-Normal, Open-Fault)
Fan Motor connector
after separating and resetting the power,
check everything is normal.
(Separate the connector after turning off the power of the
Terminal Box! When detaching and attaching the connector
during power supply, the motor can be damaged.)
If it is normal, replace the Fan Motor.
Samsung Electronics
Yes
No
After replacing the main PCB and resetting the
power, check everything is normal.
Connect the power wire (First turn off the power of
No
the Terminal Box!)
1. Connect the power wire.
2. Turn on the Terminal Box and check whether
normal power is supplied to the outdoor unit.
Troubleshooting
(cont.)
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