Samsung AQV12A1ME - Page 26

5-7
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 CN51 - discharge temperature sensor), (PIN#1,2 of CN52-OLP Te m p e r a t u re sensor)
M e a s u re the resistance between two wires and if it is same as follows, it is normal but if not,
re p l a c e .
5-3-7 (J)(K) Check the defrost temperature sensor and outdoor temperature sensor
Connector of outdoor unit control board
(PIN#1,2 of CN51 - outdoor temperature sensor),(PIN#3,4 of CN52-deice Te m p e r a t u re sensor)
M e a s u re the resistance between two wires and if it is same as follows, it is normal but if not,
replace it.
5-3-8 (L) Check the heatsink temperature sensor of IPM
Connector of outdoor unit IPM board ( C N 0 2 )
M e a s u re the resistance between two wires and if it is same as follows, it is normal but if not,
replace it.
5-3-9 (M) Check of operation current abnormal increase 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 increase 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 .
♦R506 — 680Ω ♦R507 — 1.8 KΩ ♦R508 — 10 KΩ
0°C
Ambient temperature
(°C)
Resistance of ther-
mistor [KΩ]
553
362
242
166 165
82
10°C 20°C
30°C
40°C 50°C
Ambient temperature
(°C)
Resistance of ther-
mistor [KΩ]
15°C
14.68 12.09
10 8.31
6.94 5.83
20°C
25°C
30°C
35°C 40°C
Ambient temperature
(°C)
Resistance of ther-
mistor [KΩ]
15°C
77.4 61.4 49.1 39.5 31.9 26
20°C
25°C
30°C
35°C 40°C
Troubleshooting
Samsung Electronics