Samsung AQ07P8GE Training Manual - page 79
78 | SAMSUNG
8
TROUBLESHOOTING
Troubleshooting for Non Inverter Cooling Only
(7K/9K)
(Cont.)
◆
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
YES
YES
NO
NO
NO
NO
YES
YES
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"
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 rating voltage ±10% range applied relay between Terminal
block No. N(1) and No.1
Test rod location
Normal
+
-
Condition
Voltage
IC4 Pin No.38
GND
RY71 ON
DC 4.8V
#
!
@
!
@
#
NO
YES
DB98_08187A(1)_57~100 3/27/03 2:24 PM Page 78