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5-3-6 (H)(I) Check of discharge temperature sensor and comp top OLP temperature sensor.
Connector of outdoor unit control board
(PIN#3,4 of CN41 - discharge temperature sensor)
Pin1, 2 - Take out the thermistor connected to comp top OLP t e m p e r a t u re sensor and measure
the resistance between two wires and if it is same as follows, it is normal but if not, re p l a c e .
Ambient temperature
(°C)
Resistance of ther-
mistor [KΩ]
5-3-7 (J)(K) Check the defrost temperature sensor and outdoor temperature sensor
Connector of outdoor unit control board
(PIN#1,2 of CN41 - outdoor temperature sensor)
Pin3, 4 - Take out the thermistor connected to defrost temperature sensor and measure the re s i s-
tance between two wires and if it is same as follows, it is normal but if not, replace it.
Ambient temperature
(°C)
Resistance of ther-
mistor [KΩ]
5-3-8 (L) Check of operation current abnormal rise mode
The operation abnormal current mode is the protection control for the safe operation by detect-
ing the operation current of inverter aircon by the current sensor on the control board .
If the operation current abnormal rise occurs,
♦The ventilation is not good because the outdoor unit is installed wrong (the ambient tempera-
t u re is higher than 50 °C)
-> Reinstall the outdoor unit so that the good ventilation can be made.
♦If the Refrigerant is overc h a rged.
-> Check the amount of Refrigerant.
♦If the comp is locked.
-> Replace the comp.
♦If the comp is operating without the revolution of fan motor.
-> Check the fan motor connector, replace the fan motor.
♦If the protection cover is operating with bending to the outdoor.
-> Take out the protection cover.
♦If two outdoor units are operating face to face. (the bad ventilation is made)
-> Reinstall the outdoor unit for the good ventilation.
♦The air circulation is bad due to the attachment of falling leaves
-> Take away the leaves for the good ventilation.
Check the elements of current sensor block of the outdoor control board .
♦R801 — 1 KΩ
♦R802 — 1.5 KΩ
♦R803 — 15 KΩ
Samsung Electronics
0°C
10°C
20°C
553
362
242
15°C
20°C
25°C
14.68
12.09
10
30°C
40°C
50°C
82
166
165
30°C
35°C
40°C
8.31
6.94
5.83
Troubleshooting
The error of data of
within 5%.
The error of data of
within 1%.
5-7
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Table of Contents
Troubleshooting
