Samsung AS12SGGE Training Manual page 89

8
TROUBLESHOOTING
Troubleshooting for Non Inverter Cooling Only
When the Outdoor Unit Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal?
(2) Is the set temperature of the remote control higher than room temperature in COOL mode?
(3) Is the POWER IN connector (CN71) linked correctly?
(4) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(N(1), 1)?
2) Troubleshooting procedure
After unplugging out the power cord should be
reconnected within five seconds.
Does the OPERATION lamp blink
Does the timer lamp blink during operation ?
Is the power relay RY71 operated by adjusting the
Test rod location
+
IC04 Pin No.38
Is rating Voltage ±10% range applied relay between
88 | SAMSUNG
YES
NO
#
room temperature?
Normal
Voltage
- Condition
GND RY71 ON DC 4.8V
NO
Terminal block No. N(1) and No. 1
YES
YES
Is the room sensor normal register?
10°C
17.96kΩ
(12K)
(Cont.)
NO
Check as in the procedure "No Power parts"
YES Room temperature sensor
is out of order
NO
Microcomputer is
out of order.
Power relay is
out of order
@
!
NO
20°C 30°C
12.09kΩ 8.3kΩ
YES
#
PCB Should be
@
checked.
PCB should be
checked.
Power relay should be
replaced.
Outdoor unit is
out of order.