Samsung AQ07ACVE, Service Manual

Page: 32 / 56

Samsung Electronics
5-4
5-2-3 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal?(198-264V~)
(2) Is the set temperature of the remote control higher than room temperature in COOL mode?
(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 correctly?
(5) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(5P)?
2) Troubleshooting procedure
Troubleshooting
After unplugging out the power cord
should be reconnected within five sec-
onds.
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
IC06 Pin No.3 GND RY71 ON DC 4.8V
TSH00-9 5/31/01 1:57 PM Page 5-4