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Troubleshooting
5-2-3 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)
1 )
Checklist :
(1) Is input voltage normal? (the rating voltage ±10% range)
(2) Is the set temperature of the remote control higher than room temperature in COOL m o d e ?
(3) Is the set temperature of the remote control lower than room temperature in HEAT mode?
(4) Is the POWER IN connector (CN78) linked corre c t l y ?
(5) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(7P)?
2 )
Troubleshooting pro c e d u re
After unplugging out the power cord should be recon-
nected within five seconds.
Does the operating lamp blink
Does the timer lamp blink during operation ?
Is the power relay RY71 operated by adjusting the room
temperature?
Test rod location
+
-
IC04 Pin #59
GND
Is the rating voltage ±10% range applied relay between
CN78
5-4
NO
YES
YES
NO
NO
Normal
Condition
Voltage
RY71 ON
DC 4.8V
NO
and
.
YES
Is the room sensor normal register?
10°C
17.96k Ω
Check as in the procedure "No Power parts"
PCB and Room tempera-
ture sensor should be
checked.
PCB is
out of order.
NO
Power relay is
out of order
Outdoor unit is
NO
(25°C
10KΩ)
20°C
30°C
12.09k Ω
8.3k Ω
YES
Refer to page 5-2.
Room temperature sensor is
out of order
PCB should be
checked.
Power relay should be
replaced.
out of order.
Samsung Electronics
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