Samsung AC030JN4DCH Service Manual page 50

Troubleshooting
4-3-8
1. Test Item
1) Check the power supply to the outdoor unit.
2) Check the whole connection part of the power supply.
3) Check the power to the indoor unit.
4) Check the connection of the power supply to the terminal block
5) Check the connection of the power supply between the Main EMI PBA of the outdoor unit
(RC072DHXB excluded).
6) Connect the power supply. (Never forget to turn off the power of the terminal box).
7) Check the power supply parts. (Check after turning off the power to the terminal box!)
8) Check everything is normal after separating the fan motor connector and resetting the power.
(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.)
2. Check procedure
30 seconds after turning off the main power
switch (breaker or power socket),
turn on the power.
Check the power supply of the outdoor unit.
1. Is the line voltage 220 Vac? (Yes) L N
Check the power to the indoor unit.
1. Is the line voltage 220 Vac? (Yes) 1(L) 2(N)
Check the connection
of the power supply between Main EMI PBA.
1. Is there a fault in the connection of the
power supply to Main PBA
and EMI PBA?
4-24
Yes
RC090/100/125/140/145 HXE ,
RC100DHXB
Yes
Yes
Continued
No
RC072DHXB
No
RC090/100/125/140/145 HXE ,
RC100DHXB
No
∙ 7-segment off.
∙ Conduct the following test if the mode
is not eco mode (power saving mode):
Check the whole connection part of the power
supply.
1. Check the power of the terminal box, 3-phase
electric power, and wire assembling.
2. If the connection is made in the power lines
(extension of the power line), check whether the
lines are firmly connected.
3. Check the circuit breaker due to over-current,
or leakage. Check whether several units are
connected to one breaker.
Check the connection of the power supply to the
terminal block
1. Check wires are correctly connected by
referring to the electrical circuit.
RC072DHXB
Connect the power supply.
(Power off 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.
RC072DHXB
Samsung Electronics
Series ignored