Samsung AR18NSFPEWQNEU, Service Manual

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10-35
10-2-34 Outdoor detailed inspection procedure
No procedure Inspection Method Cause
1
Plug out and pull the PCB out of
the control box
Check the PCB fuse
(Wait 3 minutes after power off)
1) Is 1st fuse disconnected?
2) Is indoor PBA faulty?
. Over current
. AC part and pattern short of Indoor
PBA
. AC part and pattern short of Outdoor
PBA
2 Check the Wiring
1) Is the Compressor wire connected
clockwise?
2) Is the Reactor wire connected
normal?
3) Is the Fan wire connected normal?
4) Is the 4way wire connected normal?
5) Is the sensor wire connected
. Wrong assembly
. Installation(service) condition is bad
Check the power voltage
1) Is the voltage between Terminal
block "L" , "N" 220V ~ 24VAC? . Power cord is faulty, Indoor PBA
fault, Wrong Power cable Wiring
2) Is the PFC050(#3-#4) input
voltage 200Vac~240Vac?
. L,N,E wire wrong wiring (Terminal
Block-PBA)
. Fuse open
. PT 021 OPEN
. RY021, RY022 is faulty
. Inverter Micom(IC501)error
3) Is the CE151 voltage 280Vdc~320dc?
. Power circuit is faulty
. Load short
3) Is the CE101 voltage 280Vdc~320dc?
. PFC050 is faulty
. Reactor wire is wrong connection
4) Is the SMPS is normal?
MAIN 12V(CE175) : 11Vdc ~ 13Vdc
. Switching Trans of Power circuit is
faulty
. Load short
5) Is the SMPS is normal?
MAIN 18V(CE170) : 17Vdc ~19Vdc
. Switching Trans of Power circuit is
faulty
. Load short
6) Is the SMPS is normal?
MAIN 5V(CE174) : 4.5V ~ 5.5Vdc
. Switching Trans of Power circuit is
faulty
. Load short
4 Check the LED lamp display
1) Normal : RED on, GRN blink, YEL off
2) Abnormal
- All off : check no power
- abnormal display : check error
mode
. L,N,C wire wrong wiring
. Outdoor PBA is faulty
Supply power and operate the set
(Use Remote-control, button in
indoor set)
3