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Troubleshooting
5-3-6 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 Temperature sensor)
Measure the resistance between two wires and if it is same as follows, it is normal but if not,
5-3-7 Check the deice temperature sensor and outdoor femperauite sensor
> Connector of outdoor unit control board
-
(PIN#1,2 of CN51 - outdoor temperature -sensor),(PIN#3,4 éi CN52-deice Temperature sensor)
Measure the resistance between two wires and if it is same as follows, it is normal but if not,
replace it.
sem a fete te Ta a
Resistance of
thermistor [KQ]
14.68
12.09
ao
5-3-8 Check of operation current abnormal increase mode
> The operation abnormal current mode is the protection control for the safe epemdion by detect-_
ing the operation current of inverter aircon by the current sensor on the conto? board.
> If the operation current.abnormal increase occurs,
2
:
The ventilation is not good because the outdoor unit is 'inetalled wrong (the ainbient tempera-
. ture is higher. than 50°C)
— Reinstall the outdoor unit so that the Sood ventilation can be made.
elf the Refrigerant is overcharged.
> Check the amount of Refrigerant.
olf the comp is locked.
— Replace the comp.
elf the comp. is operating without.the revolution of fan motor.
— Check the fan motor connector, replace the fan motor.
elf the protection cover is operating with bending to the outdoor.
— Take out the protection cover.
¢I£ 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.
Samsung Electronics
5-7
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