Samsung MH18ZC1(C2)-09 Service Manual page 33

Troubleshooting
5-4-4 When the fan of indoor unit does not operate
1) Inspection items
(1) Is the power voltage normal?
(2) Is the connector of indoor fan with the good contact? (CN73)
(3) Is the soldering status of running condenser (CR71) with the good contact?
(4) Is connector of the Hall IC with the good contact (CN43)?
(5) Is the indoor fan rotating when it is under operation mode?
(6) Is the FAN LED (green) flickering when the indoor fan stalled (for more than 15 seconds)
and the trouble condition of speed detecting part?
Error occurs after the
indoor unit fan motor is
rotating for 15 seconds?
(FAN Lamp flickering)
Y
Replacement of indoor
unit fan motor.
5-10
Put the power off and put it on after 5 seconds.
Is the operation lamp flickering for 3 minutes and
then put off?
Y
If the operation /stop button of the remote controller
is pressed, is the operation lamp flickering and then
is the indoor fan rotating after 5~6 seconds?
Y
Is AC 120V and higher shown across the indoor
fan connector (CN73) ?
Is the type of MICOM (IC 04) Pin no.
N
63 old type ?
Is the pin no. 12 of IC 06 (KID 65003)
the old type?
Is the pin no 25 of MICOM
the old type?
Replace the indoor unit PCB Ass'y due to the
Micom defect.
Y
N
Y
N
Y
N
120Hz
Y
N
120Hz
Y
N
If the power is not available (indoor
unit), item no 5-3-1.
Replace of indoor unit PCB Ass'y.
Replace the IC 06 (KID 65003) and
SS71(G3MB202pl).
Replace Q401 (Ksc 945Y).
Samsung Electronics