Samsung AS12SGGE Training Manual page 82

Troubleshooting for Non Inverter Heat Pump
8-2-2. 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 voltage 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
does not operate
Check the indoor unit
control board
Check whether two wires
of power cord are
connected correctly to the
terminal block and control board.
YES
Check whether the fuse on the
control board is normal.
F701: 3.15[A]/250[V]
YES
Check the output of SMPS
on the control board.
Input power: AC230±15%[V]
IC02 Input: DC 12[V]
IC02 output: DC 5[V]
YES
Check the setting temperature
(7K/9K)
operate
Check the of indoor unit display board
NO
Reconnect wires correctly
NO
NO
Replace the control board
TROUBLESHOOTING
(Cont.)
Replace fuse
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