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 whether
the fuse on the control board is normal.
20[A]/250[V]:
✳✳
035/052
✳✳
30[A]/250[V]:
✳✳
070
✳✳
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
12-2
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2006-04-14 ソタネト 2:26:12
Summary of Contents for UH035EAV Series
Page 46: ...MEMO Samsung Electronics 4 27 ...
Page 57: ...Samsung Electronics 5 11 5 3 Ass y Control Out UH035EAV DB93 03453A ...
Page 59: ...Samsung Electronics Ass y Control Out cont UH052EAV DB93 03665D UH070EAV DB93 03665E 5 13 ...
Page 106: ...Samsung Electronics MEMO 8 5 ...
Page 111: ...9 2 Refrigerating Cycle Diagram 9 5 Samsung Electronics EH035EAV UH035EAV ...
Page 112: ...Samsung Electronics EH052EAV UH052EAV EH070EAV UH070EAV Circuit Descriptions 9 6 ...
Page 164: ...Samsung Electronics 14 10 MEMO ...
Page 165: ...Samsung Electronics MEMO 14 11 ...