Samsung AC052MN4DKH - Page 59

Troubleshooting
4-24 Samsung Electronics
8IFOUIFPVUEPPSVOJUQPXFSJTOPU0/*OJUJBM%JBHOPTJTQIBTFQSPEVDUT
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
䭓 7-segment off.
䭓 Conduct the following test if the mode is
not Eco-mode
(power saving mode).
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 o
utdoor unit.
No
No
No
Check the power
supply of the outdoor unit.
1. Is the wire voltage 380Vac? (Yes) L1(R)ļL2(S),
L2(S)ļL3(T), L1(R)ļL3(T)
2. Is the phase voltage to the neutral wire 220Va
c?
(Yes) L1(R)/L2(S)/L3(T)ļN
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?
Continue