Samsung AM26A1C13 Service Manual page 11

3-2-3 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 (terminal-tab) linked correctly?
(4) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(5P)?
2) Troubleshooting procedure
(1) Checking procedures for the indoor unit.
After unplugging out the power cord should be
reconnected 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 No.63 GND
IC04 Pin No.62 GND
1) Is AC 198 - 264V applied relay between Terminal Tap(TB71)
and RY 71 terminal No. 3
2) Is AC 198 - 264V applied relay between Terminal Tap(TB71)
andCN 71 terminal No. 1
B Room or C Room operating
Proceed to the checking points for the outdoor unit.
10
NO
YES
YES
NO
NO 1
Normal
Condition Voltage
RY73 ON DC 4.8V
RY72 ON DC 4.8V
NO
YES
1 NO
Is the room sensor normal register?
10¡C
17.96k ½
Check as in the procedure "No Power parts"
Room temperature sensor is
out of order
2
Microcomputer is
out of order.
YES 3
Power relay is
out of order
A Room operation
ÒAÓCompreessor or outdoor fan-motor replaced
2 NO
20¡C 30¡C
12.09k ½ 8.3k ½
YES 3
Refer to page 8.
PCB should be checked.
PCB should be
checked.
Power relay should be
replaced.