Operating Instructions and Installation
4-18
Samsung Electronics
4-3-7When outdoor units cannot be turned on
1. Cause of the breakdown
1) Is power voltage 220V?
2) Is AC power properly connected?
3) Are the LEDs of Main PCB and inverter PCB of the outdoor unit on?
4) Is the power supply of the outdoor unit 220V?
2. Inspection order
Yes
No
Bridge 10de replacement (DB300)
Yes
Yes
Yes
Yes
Switch off the main power (breaker or power
outlet) then turn on again after 30 seconds.
Replace outdoor unit PCB for
Outdoor MICOM defect.
Check and replace the wire that connects the
outdoor terminal block to outdoor unit’s PCB
(contact point, short-circuit)
No
Is the voltage of N-L of the
outdoor unit’s PCB
AC187V~AC253V?
Is the voltage of the both side of
BD01, “~” and “~” of the outdoor unit’s
Main PCB AC187V~AC253V?
Is the voltage of C101 chemical
condenser of the outdoor units’ Main PCB
DC265V~DC357V?
No
R001 Resistance replacement
Is the resistance value of
R001 180Ω~220Ω?
No
Connect the connection wire of the reactor
Is reactor 1 and 2
(reactor connection wire) properly connected
to the reactor?
Yes
Power ok?
Yes
No
Finish
