Samsung AS12SGGE Training Manual page 84

Troubleshooting for Non Inverter Heat Pump
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 set temperature of the remote control lower than room temperature in HEAT mode?
(4) Is the POWER IN connector (CN71) linked correctly?
(5) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(N(1), 1, 2, 3)?
2) Troubleshooting procedure
After unplugging out the power cord should be
reconnected within five seconds.
Does the OPERATION lamp blink
YES
Does the timer lamp blink during operation ?
NO
#
Is the power relay RY71 operated by adjusting the
room temperature?
Test rod location
+ - Condition
IC4 Pin No.38 GND RY71 ON
NO
Is rating voltage ±10% range applied relay between
Terminal block No. N(1) and No. 1
YES
(7K/9K)
NO
YES
!
NO
Normal
Voltage
DC 4.8V
Power relay is
out of order
!
NO
YES
@
Is the room sensor normal register?
10°C 20°C
17.96kΩ 12.09kΩ
YES
#
TROUBLESHOOTING
(Cont.)
Check as in the procedure "No Power parts"
Room temperature sensor is
out of order
@ PCB should be
checked.
Microcomputer is
out of order.
PCB should be
checked.
Power relay should be
replaced.
Outdoor unit is
out of order.
30°C
8.3kΩ
SAMSUNG | 83
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