Sunlight Supply Samsung Programmable Thermostat for Split Systems - Manual (Page 74)

12-
7
Indoor fan motor speed detecting error (BLDC fan)
Indoor display ل ل ሱ Indoor fan error
1.Checklist :
1) Is the indoor units fan motor properly connected with the connector(CN72)?
2) Is the AC voltage correct?
2. Troubleshooting procedure
Does the fan rotate?
Power o ī and Separate the Fan motor wire from
CN72 on Indoor PBA
NO
YES
Is the fan error appeared again?
Reassemble the fan wire and input the power again
YES
Is the voltage of CN72 #3-#5 and
#3-#6 with in 1Vdc~15Vdc during
the opera Ɵon?
YES
Exchange the Indoor PBA
Terminate the
service
NO
NO
PBA problem or Motor problem
Change the PBA Įrst and check the operaƟon
Exchange the Fan motor
Is there short among each pin
#1~#6
YES
Exchange the Fan
motor
Is the voltage of CN72 #1-#3 over
250Vdc
NO
Follow the check procedure of Indoor unit power
supply error check
NO
YES
Restart a Ōer power oī.