Samsung AS12SGGE Training Manual page 77

8
TROUBLESHOOTING
Troubleshooting for Non Inverter Cooling Only
8-1-2. Fault Diagnosis by Symptom
No Power (completely dead)-Initial diagnosis
1) Checklist :
(1) Is input voltage normal?
(2) Is AC power linked correctly?
(3) Is input voltoge of DC regulator IC KA7805 (IC02) normal? (11VDC-12.5VDC)
(4) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC)
2) Troubleshooting procedure
Unplug the power cord and
plug it after 5 seconds
Press the Power Button on the
remote control unit to
operate the air conditioner
Check the indoor unit
control board
Check whether two wires
of power cord are
connected correctly to the
terminal block and control board.
Check whether the fuse on the
control board is normal.
F701: 3.15[A]/250[V]
Check the output of SMPS
on the control board.
Input power: AC230±15%[V]
IC02 Input: DC 12[V]
IC02 output: DC 5[V]
Check the setting temperature
76 | SAMSUNG
operate
does not operate
NO
YES
NO
YES
NO
YES
(7K/9K)
(Cont.)
Check the of indoor unit display board
Reconnect wires correctly
Replace fuse
Replace the control board