Samsung AC030JN4DCH Service Manual page 51

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
3. Is the power supply voltage 12V?
4. Is there a fault with a fuse of EMI PBA?
(Short-Normal,
Fan Motor Connector
After separating and resetting
the power, check everything is normal.
(Separate the connector after turning off the
power to the terminal box!
When detaching and attaching the connector
during power supply, the motor can be
damaged.)
replace the fan motor.
Samsung Electronics
Continued
290 Vdc?
Open-Fault)
Outdoor main PBA checking part
Fuse
Fuse
Yes
Indoor control PBA checking part
Front Fuse
If it is normal,
Outdoor inverter PBA
checking part
Fan Motor
Connector
[RC090/100/125/140/145 HXE ,
RC100DHXB ]
No
12V power
Bridge Diode
Bridge Diode (back)
[RC072DHXB ]
No
Indoor control PBA checking part
[RC072DHXB ]
(Continued)
After replacing the main PBA and resetting
the power, check everything is normal.
Outdoor EMI PBA checking part
EMI PBA Fuse
Display PBA checking part
12V power
Connect the power supply.
(Switch off power to the terminal box!)
1. Connect the power supply.
2. Check whether the power of the outdoor unit
is supplied by powering on the terminal box.
Troubleshooting
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