Product specifications

Samsung Electronics
5-10
Troubleshooting
(2) When all of the indoor units (B & C) are turned off
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Turn off the outdoor power, and then turn on
the power in 5 seconds.
Is the SV1 turned off after operating for
about 2 minutes
when all of the indoor units (B & C)
are turned off?
• Check and replace the
IC02-IC03.
• Check and replace the C901.
(1) Does the No14 pin output of
the IC04 maintain "High"?
(2) Does the No1 pin output of "Low"?
Are the Q906 and Q908 in "turn-on"
condition?
Is the Q907 in "turn-off" condition?
Is the No8 pin output of
the IC04 in "High" condition?
Does the No8 pin output of
the IC04 change from "High" to "Low"?
Does the turning on and then
turning off of the Q702 lead to
turning off of the SV-BY relay (RY72)?
Normal
• Check and replace the IC04.
• Check and replace the IC04
maintain resistance
(R902, R903,R905, R906).
(1) Is the No.12 pin voltage
of the IC04 DC7V?
(2) Is the No.3 pin voltage
of the IC04 DC5V?
Check and replace each transistor
Is the voltage at both
ends of the C901 0V?
Is the No10 pin voltage
of the IC04 DC7V?
Is the voltage charged to
the C904 above DC7V?
The "High" condition should be maintained for about 2 minutes
until the voltage of about DC7V or higher is applied to the C904.
Check and replace the R920 and R921.
Check and replace the C904.
IC04 Check and replace
The output is changed from "High" to "Low" when charging
to the C904 is completed.
Check and replace the Q702 and relay.
(Resistance at both ends of the relay: 400Ω)
Replace the SV-BY solenoid.
• Check and replace the IC04.
• Check and replace the R922,
and R924.