Samsung Electronics
5-2-6 When the fan motor does not operated
5-7
1) Check points
(1) Is the voltage of the power source normal ?(AC198V ~ AC264V)
(2) Is the electric wire in good contact ?(CN71, RY71)
(3) Is the starting condenser in good contact?
(4) Is the fan motor connector in good contact?(CN73)
(5) Is the output voltage of the IC01(KA7812) and IC02(KA7805) normal ?
Turn off the power, and then turn it on again five
seconds later.
Replace the fan motor.
Dose the buzzer sound, when the power on?
Check whether the "COOL" LED lamp is on and the
operation starts when pressing the on/off button
of the remocon.
Is the IC03(MAIN PCB) output normal?
When the fan motor is High, IC03(MAIN PCB)
No. 14 pin –> LOW.
When the fan motor is Low, IC03(MAIN PCB)
No. 15 pin –> LOW.
Does the relay(RY 72, 73) operate normally?
When the fan motor is High, RY72 should operate.
When the fan motor is Low, RY73 should operate.
Go to the clause "No power".
• Go to the clause of "when the remocon
does not operated".
• Check the IC03(MAIN PCB) for a short
and cold soldering.
• Replace the IC03(MAIN PCB).
• Check the relay coil resistance.
(Normal: About 400
Ω
)
• Replace the relay.
N
Y
Y
Y
Is the fan motor normal?
Y
Y
N
N
N
• Check the fan motor resistance.
(0
Ω
: short,
∞Ω
: open)
N
AW126JB-2 6/27/98 10:40 AM Page 11
