Product specifications

5-2-4 When the compressor is not operated
Samsung Electronics 5-5
1) Check points
(1) Is the voltage of the power source normal ? (AC 198V ~ AC 264V)
(2) Is the desired temperature lower than the indoor temperature in the “COOL” mode?
(Compressor stopped)
(3) Is the desired temperature higher than the indoor temperature in the “HEAT” mode?
(Compressor stopped)
(4) Is the starting condenser in good contact?
(5) Is the electric wire in good contact ? (CN71, RY71)
(6) 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 compressor.
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 compressor is ON, IC03(MAIN PCB)
No. 14 pin –> Low.
Does the relay(RY71) operate normally?
When the compressor is ON, the RY71 should operat.
Is the compressor normal?
Go to the clause "No power".
• Go to the clause "when he remocon
does not operate".
• Check the IC03(MAIN PCB) for short and
cold soldering.
• Replace the IC03(MAIN PCB).
• Check the relay coil resistance.
(resistance : About 150Ω±20Ω)
• Replace the relay.
• Check the operation of the O.L.P,
and replace it if necessary.
• Check the compressor
resistance.(0Ω : short, ∞Ω : open)
N
Y
Y
Y
Y
Y
N
Normal operation.
N
Y
N
N
N
Check whether the compressor is activated in three
minutes after turning on the power with the "COOL" or
"HEAT" LED lamp being switched on when selecting the
cool mode of the remocon.
AW126JB-2 6/27/98 10:40 AM Page 9