Samsung UH052EAV, Руководство по обслуживанию

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12-2 Samsung Electronics
12-2 Fault Diagnosis by Symptom
12-2-1 No Power (completely dead)-Initial diagnosis
1. Checklist :
1) Is input voltage normal?
2) Is AC power linked correctly?
3) Is input voltage of DC regulator IC KA7805 (IC16, IC19) normal? (11VDC-12.5VDC) - Outdoor Controller
4) Is output voltage of DC regulator IC KA7805 (IC16, IC19) normal? (4.5VDC-5.5VDC) - Outdoor Controller
2. Troubleshooting procedure
PCB should be replaced
No
Replace fuse
No
Reconnect wires correctly
No
◆
Check the display board
operate
Press the
Power Button on the
remote control unit to operate the
air conditioner
Unplug the power cord and
plug it after 30 seconds
◆
Check the indoor unit/outdoor Unit
control board
does not operate
Check whether
2 wires of power cord are
connected correctly to the
terminal block and
control board.
Check the input/output
voltage of SMPS on the INV PCB.
DC_Link voltage(C101):DC300[V]
IC16, IC19 Input:DC12[V]
output: DC5[V]
◆
Check the setting temperature
Yes
Yes
Yes
Yes
Check whether
the fuse on the control board is normal.
20[A]/250[V]:
✳✳
052
✳✳✳
30[A]/250[V]:
✳✳
070
✳✳✳
25890A(1)_1.indd 2 2006-04-14 ｿﾀﾈﾄ 2:23:54