Samsung Electronics
5-4
5-2-3 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)
1 ) Checklist :
(1) Is input voltage normal?(198~264VA C )
(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 (terminal-tab) linked corre c t l y ?
(5) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(5P)?
2 ) Troubleshooting pro c e d u re
Troubleshooting
After unplugging out the power cord should
be reconnected within five seconds.
Does the operating lamp blink
YES
YES
NO
NO
NO 1
YES 3
2
NO
YES
1 NO
2 NO
Outdoor unit is
out of order.
Power relay is
out of order
Power relay should be
replaced.
PCB should be
checked.
Microcomputer is
out of order.
PCB should be
checked.
Room temperature sensor is
out of order
Check as in the procedure "No Power parts"
Refer to page 5-2.
YES 3
Is the room sensor normal register?
10°C 20°C 30°C
17.96k Ω 12.09k Ω 8.3k Ω
Does the timer lamp blink during operation ?
Is the power relay RY71 operated by adjusting
the room temperature?
Is AC 198 - 264V applied relay between Terminal
Tap(TB71) and RY 71 terminal No. 3
Test rod location
Normal
+ - Condition
Voltage
IC1 Pin No.63 GND RY73 ON DC 4.8V
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