Samsung AP500PF, Service Manual

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Troubleshooting
5-4
Samsung Electronics
5-3-3 When the Compressor Does not Operate
1) Checkpoints
(1) Is the voltage of the power source normal?(AC 187V - AC 253V)
(2) Is the desired temperature set at a higher level than the current temperature at the time of “Cool”
o p e r a t i o n ?
(3) Is the power-in good contact with the comp. connector(GT 1, 2, 3)?
(4) Check the wirings of the outdoor and indoor unit for a wrong connection or poor contact.
(5) Isn’t the compressor in a 3-minute stand-by state?
2) Checking pro c e d u res(after checking the checkpoints of clause 1)
Y
N
N
N
Y
Y
Y
Y
N
N
N
Y
Y
N
Turn off the power, and then turn it on in 5 seconds.
Then the compressor and relay are norm a l .
Replace the relay when the
resistance is 0
Ω
or
∞
.
Then check and replace the
MICOM (IC1).
Then check and
replace the IC 3
Is it “low” when
checking the output
wave of the IC 3
No. 16.
Check and measure
the resistance
value after turning
off the power.
Check whether the relay(RY1) is turned on and the com-
pressor is operated in 3 minutes after starting the
“COD” operation by activating the on/off button and
operation made key.
Is the resistance at both ends/of the re l a y ( RY 1) coil approximately 400
Ω
?
Is it “high” when checking the output wave of the MICOM
(IC1) pin No. 6?
Is the voltage at both ends/of the relay(RY1) coil DC 12V?
Is the voltage at both ends/of the electronic contactor coil
AC 220V?
Replace the compressor.
Then check and replace the
electronic contactor
Then check the wiring of indoor and Then
check the wiring of indoor and or open.
Is the voltage at both ends/of the electronic contactor terminal AC 220V?