Troubleshooting
4-26 Samsung Electronics
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1. Test items
1) Check the power connection of outdoor unit.
2) Check the whole connection part of the power wire.
3) Check the power on the indoor unit.
4) Check the co
nnection of the power wire of the Terminal Block.
5) Check the connection of the power wire between the MainļEMI PBA of the outdoor unit.
6) Connect the power wire. (Nev
er forget to turn off the power of the Terminal Box).
7) Check the power supply parts. (Check after turning off the power of the Terminal Box!)
8) Check everything is no
rmal after separating the fan motor connector and resetting the power.
(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.)
2. Check procedure
Yes
Yes
Yes
30 seconds after turning off the Main Power
Switch (Breaker or Power outlet), turn on the
power.
Check all power wire connections.
1. Check the power of the terminal box, 3-phase
power phase, and wire assembling.
2. If the connection is made in the power wire
(extension of
the power wire), make sure that it
is securely connected.
3. Check the circuit breaker due to over-current,
or leakage. Check whether several units are
connected to one b
reaker.
Check the connection of Terminal Block power
wire.
1. Check whether each wires were connected
rightly. (Refer to electrical schematics)
Connect the power wire (First turn off the power
of the Terminal Box!)
1. Connect the power wire.
2. Turn on the Terminal Box and check whether
normal power is supplied to the ou
tdoor unit.
No
No
No
Check the power to the outdoor unit.
1. Is the voltage 220Vac between the wires?
(Yes) LļN
Check the power to the indoor unit.
1. Is the voltage 220Vac between the wires?
(Yes) 1(L)ļ2(N)
Check the connection
of the power supply between MainļEMI PCB.
1. Is there a fault in the connection of the
power supply to Main PCB
and EMI PCB?
䭓7-segment off.
䭓Conduct the following test if the mode is
not Eco-mode (power saving mode).
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